update client-go version

2026-06-14 18:40:55 +00:00 · 2019-08-15 16:55:44 -07:00
12783 changed files with 31103 additions and 1023518 deletions
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -1,100 +0,0 @@
-name: Go
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-
-  lint:
-    name: Lint
-    runs-on: [ubuntu-latest]
-    steps:
-
-    - name: Set up Go 1.x
-      uses: actions/setup-go@v2
-      with:
-        go-version: ^1.13
-      id: go
-
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
-
-    - name: Lint
-      run: ./travis/kyaml-pre-commit.sh
-      env:
-        KUSTOMIZE_DOCKER_E2E: false # don't need to do e2e tests for linting
-
-  test-linux:
-    name: Test Linux
-    runs-on: [ubuntu-latest]
-    steps:
-
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v2
-        with:
-          go-version: ^1.13
-        id: go
-
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
-
-      - name: Test kyaml
-        run: go test -cover ./...
-        working-directory: ./kyaml
-
-      - name: Test cmd/config
-        run: go test -cover ./...
-        working-directory: ./cmd/config
-        env:
-          KUSTOMIZE_DOCKER_E2E: true
-
-  test-macos:
-    name: Test MacOS
-    runs-on: [macos-latest]
-    steps:
-
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v2
-        with:
-          go-version: ^1.13
-        id: go
-
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
-
-      - name: Test kyaml
-        run: go test -cover ./...
-        working-directory: ./kyaml
-
-      - name: Test cmd/config
-        run: go test -cover ./...
-        working-directory: ./cmd/config
-        env:
-          KUSTOMIZE_DOCKER_E2E: false # docker not installed on mac
-
-  test-windows:
-    name: Test Windows
-    runs-on: [windows-latest]
-    steps:
-
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v2
-        with:
-          go-version: ^1.13
-        id: go
-
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
-
-      - name: Test kyaml
-        run: go test -cover ./...
-        working-directory: ./kyaml
-
-      - name: Test cmd/config
-        run: go test -cover ./...
-        working-directory: ./cmd/config
-        env:
-          KUSTOMIZE_DOCKER_E2E: false # docker on windows not working well yet
--- a/.gitignore
+++ b/.gitignore
@@ -5,9 +5,6 @@
 *.so
 *.dylib

-.idea
-*.iml
-
 # Test binary, build with `go test -c`
 *.test

@@ -19,5 +16,3 @@

 # macOS
 *.DS_store
-
-.bin
--- a/.golangci-kustomize.yml
+++ b/.golangci-kustomize.yml
@@ -1,50 +0,0 @@
-run:
-  deadline: 5m
-
-linters:
-  disable-all: true
-  enable:
-    - bodyclose
-    - deadcode
-    - depguard
-    # - dogsled
-    - dupl
-    # - errcheck
-    # - funlen
-    # - gochecknoinits
-    - goconst
-    # - gocritic
-    - gocyclo
-    - gofmt
-    - goimports
-    - golint
-    - gosec
-    - gosimple
-    - govet
-    - ineffassign
-    - interfacer
-    - lll
-    - misspell
-    - nakedret
-    # - scopelint
-    - staticcheck
-    - structcheck
-    # stylecheck demands that acronyms not be treated as words
-    # in camelCase, so JsonOp become JSONOp, etc.  Yuck.
-    # - stylecheck
-    - typecheck
-    - unconvert
-    - unparam
-    - unused
-    - varcheck
-    # - whitespace
-
-linters-settings:
-  dupl:
-    threshold: 400
-  lll:
-    line-length: 170
-  gocyclo:
-    min-complexity: 15
-  golint:
-    min-confidence: 0.85
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -0,0 +1,30 @@
+run:
+  deadline: 5m
+
+linters:
+  disable-all: true
+  enable:
+    - dupl
+    - goconst
+    - gocyclo
+    - gofmt
+    - golint
+    - govet
+    - ineffassign
+    - interfacer
+    - lll
+    - misspell
+    - nakedret
+    - structcheck
+    - unparam
+    - varcheck
+
+linters-settings:
+  dupl:
+    threshold: 400 
+  lll:   
+    line-length: 170
+  gocyclo:
+    min-complexity: 15
+  golint:
+    min-confidence: 0.85
--- a/.travis.yml
+++ b/.travis.yml
@@ -0,0 +1,44 @@
+os:
+  - linux
+  - osx
+# TODO: Uncomment when tests running on Windows.
+#  - windows
+
+addons:
+  apt:
+    packages:
+    - tree
+  homebrew:
+    packages:
+    - tree
+    update: true
+
+# Only clone the most recent commit.
+git:
+  depth: 1
+
+language: go
+
+go:
+  - "1.12"
+
+go_import_path: sigs.k8s.io/kustomize
+
+before_install:
+  - source ./travis/consider-early-travis-exit.sh
+  - curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(go env GOPATH)/bin v1.17.1
+  - go get -u github.com/monopole/mdrip
+  # The following would install Helm if needed for some reason.
+  # - wget https://storage.googleapis.com/kubernetes-helm/helm-v2.13.1-linux-amd64.tar.gz
+  # - tar -xvzf helm-v2.13.1-linux-amd64.tar.gz
+  # - sudo mv linux-amd64/helm /usr/local/bin/helm
+
+# Skip the install process; let pre-commit.sh do it.
+install: true
+
+script:
+  - ./travis/pre-commit.sh
+
+# TBD. Suppressing for now.
+notifications:
+  email: false
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,15 +6,11 @@ _As contributors and maintainers of this project, and in the interest of fosteri

 ## Getting Started

-Dev guides:
-
- [Mac](docs/macDevGuide.md)
-
 We have full documentation on how to get started contributing here:

 - [Contributor License Agreement](https://git.k8s.io/community/CLA.md) Kubernetes projects require that you sign a Contributor License Agreement (CLA) before we can accept your pull requests
 - [Kubernetes Contributor Guide](http://git.k8s.io/community/contributors/guide) - Main contributor documentation, or you can just jump directly to the [contributing section](http://git.k8s.io/community/contributors/guide#contributing)
- [Contributor Cheat Sheet](https://git.k8s.io/community/contributors/guide/contributor-cheatsheet/README.md) - Common resources for existing developers
+- [Contributor Cheat Sheet](https://git.k8s.io/community/contributors/guide/contributor-cheatsheet.md) - Common resources for existing developers

 ## Mentorship

--- a/318
+++ b/318
@@ -1,318 +0,0 @@
-# Copyright 2019 The Kubernetes Authors.
-# SPDX-License-Identifier: Apache-2.0
-#
-# Makefile for kustomize CLI and API.
-
-MYGOBIN := $(shell go env GOPATH)/bin
-SHELL := /bin/bash
-export PATH := $(MYGOBIN):$(PATH)
-
-.PHONY: all
-all: verify-kustomize
-
-.PHONY: verify-kustomize
-verify-kustomize: \
-	lint-kustomize \
-	test-unit-kustomize-all \
-	test-examples-kustomize-against-HEAD \
-	test-examples-kustomize-against-3.6.1
-
-# The following target referenced by a file in
-# https://github.com/kubernetes/test-infra/tree/master/config/jobs/kubernetes-sigs/kustomize
-.PHONY: prow-presubmit-check
-prow-presubmit-check: \
-	lint-kustomize \
-	test-unit-kustomize-all \
-	test-examples-kustomize-against-HEAD \
-	test-examples-kustomize-against-3.6.1 \
-	test-unit-cmd-all \
-	test-go-mod
-
-.PHONY: verify-kustomize-e2e
-verify-kustomize-e2e: test-examples-e2e-kustomize
-
-# Other builds in this repo might want a different linter version.
-# Without one Makefile to rule them all, the different makes
-# cannot assume that golanci-lint is at the version they want
-# since everything uses the same implicit GOPATH.
-# This installs in a temp dir to avoid overwriting someone else's
-# linter, then installs in MYGOBIN with a new name.
-# Version pinned by hack/go.mod
-$(MYGOBIN)/golangci-lint-kustomize:
-	( \
-		set -e; \
-		cd hack; \
-		GO111MODULE=on go build -tags=tools -o $(MYGOBIN)/golangci-lint-kustomize github.com/golangci/golangci-lint/cmd/golangci-lint; \
-	)
-
-# Version pinned by api/go.mod
-$(MYGOBIN)/mdrip:
-	cd api; \
-	go install github.com/monopole/mdrip
-
-# Version pinned by api/go.mod
-$(MYGOBIN)/stringer:
-	cd api; \
-	go install golang.org/x/tools/cmd/stringer
-
-# Version pinned by api/go.mod
-$(MYGOBIN)/goimports:
-	cd api; \
-	go install golang.org/x/tools/cmd/goimports
-
-# Install resource from whatever is checked out.
-$(MYGOBIN)/resource:
-	cd cmd/resource; \
-	go install .
-
-# To pin pluginator, use this recipe instead:
-#   cd api;
-#   go install sigs.k8s.io/kustomize/pluginator/v2
-$(MYGOBIN)/pluginator:
-	cd pluginator; \
-	go install .
-
-# Install kustomize from whatever is checked out.
-$(MYGOBIN)/kustomize:
-	cd kustomize; \
-	go install .
-
-.PHONY: install-tools
-install-tools: \
-	$(MYGOBIN)/goimports \
-	$(MYGOBIN)/golangci-lint-kustomize \
-	$(MYGOBIN)/mdrip \
-	$(MYGOBIN)/pluginator \
-	$(MYGOBIN)/stringer
-
-### Begin kustomize plugin rules.
-#
-# The rules to deal with builtin plugins are a bit
-# complicated because
-#
-# - Every builtin plugin is a Go plugin -
-#   meaning it gets its own module directory
-#   (outside of the api module) with Go
-#   code in a 'main' package per Go plugin rules.
-# - kustomize locates plugins using the
-#   'apiVersion' and 'kind' fields from the
-#   plugin config file.
-# - k8s wants CamelCase in 'kind' fields.
-# - The module name (the last name in the path)
-#   must be the lowercased 'kind' of the
-#   plugin because Go and related tools
-#   demand lowercase in import paths, but
-#   allow CamelCase in file names.
-# - the generated code must live in the api
-#   module (it's linked into the api).
-
-# Where all generated builtin plugin code should go.
-pGen=api/builtins
-# Where the builtin Go plugin modules live.
-pSrc=plugin/builtin
-
-_builtinplugins = \
-	AnnotationsTransformer.go \
-	ConfigMapGenerator.go \
-	HashTransformer.go \
-	ImageTagTransformer.go \
-	LabelTransformer.go \
-	LegacyOrderTransformer.go \
-	NamespaceTransformer.go \
-	PatchJson6902Transformer.go \
-	PatchStrategicMergeTransformer.go \
-	PatchTransformer.go \
-	PrefixSuffixTransformer.go \
-	ReplicaCountTransformer.go \
-	SecretGenerator.go \
-	ValueAddTransformer.go
-
-# Maintaining this explicit list of generated files, and
-# adding it as a dependency to a few targets, to assure
-# they get recreated if deleted.  The rules below on how
-# to make them don't, by themselves, assure they will be
-# recreated if deleted.
-builtinplugins = $(patsubst %,$(pGen)/%,$(_builtinplugins))
-
-# These rules are verbose, but assure that if a source file
-# is modified, the corresponding generated file, and only
-# that file, will be recreated.
-$(pGen)/AnnotationsTransformer.go: $(pSrc)/annotationstransformer/AnnotationsTransformer.go
-$(pGen)/ConfigMapGenerator.go: $(pSrc)/configmapgenerator/ConfigMapGenerator.go
-$(pGen)/HashTransformer.go: $(pSrc)/hashtransformer/HashTransformer.go
-$(pGen)/ImageTagTransformer.go: $(pSrc)/imagetagtransformer/ImageTagTransformer.go
-$(pGen)/LabelTransformer.go: $(pSrc)/labeltransformer/LabelTransformer.go
-$(pGen)/LegacyOrderTransformer.go: $(pSrc)/legacyordertransformer/LegacyOrderTransformer.go
-$(pGen)/NamespaceTransformer.go: $(pSrc)/namespacetransformer/NamespaceTransformer.go
-$(pGen)/PatchJson6902Transformer.go: $(pSrc)/patchjson6902transformer/PatchJson6902Transformer.go
-$(pGen)/PatchStrategicMergeTransformer.go: $(pSrc)/patchstrategicmergetransformer/PatchStrategicMergeTransformer.go
-$(pGen)/PatchTransformer.go: $(pSrc)/patchtransformer/PatchTransformer.go
-$(pGen)/PrefixSuffixTransformer.go: $(pSrc)/prefixsuffixtransformer/PrefixSuffixTransformer.go
-$(pGen)/ReplicaCountTransformer.go: $(pSrc)/replicacounttransformer/ReplicaCountTransformer.go
-$(pGen)/SecretGenerator.go: $(pSrc)/secretgenerator/SecretGenerator.go
-$(pGen)/ValueAddTransformer.go: $(pSrc)/valueaddtransformer/ValueAddTransformer.go
-
-# The (verbose but portable) Makefile way to convert to lowercase.
-toLowerCase = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1))))))))))))))))))))))))))
-
-$(pGen)/%.go: $(MYGOBIN)/pluginator
-	@echo "generating $*"
-	( \
-		set -e; \
-		cd $(pSrc)/$(call toLowerCase,$*); \
-		go generate .; \
-		cd ../../../$(pGen); \
-		$(MYGOBIN)/goimports -w $*.go \
-	)
-
-# Target is for debugging.
-.PHONY: generate-kustomize-builtin-plugins
-generate-kustomize-builtin-plugins: $(builtinplugins)
-
-.PHONY: kustomize-external-go-plugin-build
-kustomize-external-go-plugin-build:
-	./hack/buildExternalGoPlugins.sh ./plugin
-
-.PHONY: kustomize-external-go-plugin-clean
-kustomize-external-go-plugin-clean:
-	./hack/buildExternalGoPlugins.sh ./plugin clean
-
-### End kustomize plugin rules.
-
-.PHONY: lint-kustomize
-lint-kustomize: install-tools $(builtinplugins)
-	cd api; \
-	$(MYGOBIN)/golangci-lint-kustomize -c ../.golangci-kustomize.yml run ./...
-	cd kustomize; \
-	$(MYGOBIN)/golangci-lint-kustomize -c ../.golangci-kustomize.yml run ./...
-	cd pluginator; \
-	$(MYGOBIN)/golangci-lint-kustomize -c ../.golangci-kustomize.yml run ./...
-
-# Used to add non-default compilation flags when experimenting with
-# plugin-to-api compatibility checks.
-.PHONY: build-kustomize-api
-build-kustomize-api: $(builtinplugins)
-	cd api; go build ./...
-
-.PHONY: test-unit-kustomize-api
-test-unit-kustomize-api: build-kustomize-api
-	cd api; go test ./...  -ldflags "-X sigs.k8s.io/kustomize/api/provenance.version=v444.333.222"
-
-.PHONY: test-unit-kustomize-plugins
-test-unit-kustomize-plugins:
-	./hack/testUnitKustomizePlugins.sh
-
-.PHONY: test-unit-kustomize-cli
-test-unit-kustomize-cli:
-	cd kustomize; go test ./...
-
-.PHONY: test-unit-kustomize-all
-test-unit-kustomize-all: \
-	test-unit-kustomize-api \
-	test-unit-kustomize-cli \
-	test-unit-kustomize-plugins
-
-test-unit-cmd-all:
-	./travis/kyaml-pre-commit.sh
-
-test-go-mod:
-	./travis/check-go-mod.sh
-
-.PHONY:
-test-examples-e2e-kustomize: $(MYGOBIN)/mdrip $(MYGOBIN)/kind
-	( \
-		set -e; \
-		/bin/rm -f $(MYGOBIN)/kustomize; \
-		echo "Installing kustomize from ."; \
-		cd kustomize; go install .; cd ..; \
-		./hack/testExamplesE2EAgainstKustomize.sh .; \
-	)
-
-.PHONY:
-test-examples-kustomize-against-HEAD: $(MYGOBIN)/kustomize $(MYGOBIN)/mdrip
-	./hack/testExamplesAgainstKustomize.sh HEAD
-
-.PHONY:
-test-examples-kustomize-against-3.6.1: $(MYGOBIN)/mdrip
-	( \
-		set -e; \
-		tag=v3.6.1; \
-		/bin/rm -f $(MYGOBIN)/kustomize; \
-		echo "Installing kustomize $$tag."; \
-		GO111MODULE=on go get sigs.k8s.io/kustomize/kustomize/v3@$${tag}; \
-		./hack/testExamplesAgainstKustomize.sh $$tag; \
-		echo "Reinstalling kustomize from HEAD."; \
-		cd kustomize; go install .; \
-	)
-
-# linux only.
-# This is for testing an example plugin that
-# uses kubeval for validation.
-# Don't want to add a hard dependence in go.mod file
-# to github.com/instrumenta/kubeval.
-# Instead, download the binary.
-$(MYGOBIN)/kubeval:
-	( \
-		set -e; \
-		d=$(shell mktemp -d); cd $$d; \
-		wget https://github.com/instrumenta/kubeval/releases/latest/download/kubeval-linux-amd64.tar.gz; \
-		tar xf kubeval-linux-amd64.tar.gz; \
-		mv kubeval $(MYGOBIN); \
-		rm -rf $$d; \
-	)
-
-# linux only.
-# This is for testing an example plugin that uses helm to inflate a chart
-# for subsequent kustomization.
-# Don't want to add a hard dependence in go.mod file to helm.
-# Instead, download the binaries.
-$(MYGOBIN)/helmV2:
-	( \
-		set -e; \
-		d=$(shell mktemp -d); cd $$d; \
-		tgzFile=helm-v2.13.1-linux-amd64.tar.gz; \
-		wget https://storage.googleapis.com/kubernetes-helm/$$tgzFile; \
-		tar -xvzf $$tgzFile; \
-		mv linux-amd64/helm $(MYGOBIN)/helmV2; \
-		rm -rf $$d \
-	)
-
-# Helm V3 differs from helm V2; downloading it to provide coverage for the
-# chart inflator plugin under helm v3.
-$(MYGOBIN)/helmV3:
-	( \
-		set -e; \
-		d=$(shell mktemp -d); cd $$d; \
-		tgzFile=helm-v3.2.0-rc.1-linux-amd64.tar.gz; \
-		wget https://get.helm.sh/$$tgzFile; \
-		tar -xvzf $$tgzFile; \
-		mv linux-amd64/helm $(MYGOBIN)/helmV3; \
-		rm -rf $$d \
-	)
-
-# Default version of helm is v2 for the time being.
-$(MYGOBIN)/helm: $(MYGOBIN)/helmV2
-	ln -s $(MYGOBIN)/helmV2 $(MYGOBIN)/helm
-
-$(MYGOBIN)/kind:
-	( \
-        set -e; \
-        d=$(shell mktemp -d); cd $$d; \
-        wget -O ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-$(shell uname)-amd64; \
-        chmod +x ./kind; \
-        mv ./kind $(MYGOBIN); \
-        rm -rf $$d; \
-	)
-
-.PHONY: clean
-clean: kustomize-external-go-plugin-clean
-	go clean --cache
-	rm -f $(builtinplugins)
-	rm -f $(MYGOBIN)/pluginator
-	rm -f $(MYGOBIN)/kustomize
-	rm -f $(MYGOBIN)/golangci-lint-kustomize
-
-# Nuke the site from orbit.  It's the only way to be sure.
-.PHONY: nuke
-nuke: clean
-	go clean --modcache
--- a/2
+++ b/2
@@ -9,5 +9,3 @@ aliases:
    - mengqiy
    - monopole
    - pwittrock
-    - mortent
-    - phanimarupaka
--- a/README.md
+++ b/README.md
@@ -12,26 +12,18 @@ and it's like [`sed`], in that it emits edited text.
 This tool is sponsored by [sig-cli] ([KEP]), and
 inspired by [DAM].

-[![Build Status](https://prow.k8s.io/badge.svg?jobs=kustomize-presubmit-master)](https://prow.k8s.io/job-history/kubernetes-jenkins/pr-logs/directory/kustomize-presubmit-master)
+
+[![Build Status](https://travis-ci.org/kubernetes-sigs/kustomize.svg?branch=master)](https://travis-ci.org/kubernetes-sigs/kustomize)
 [![Go Report Card](https://goreportcard.com/badge/github.com/kubernetes-sigs/kustomize)](https://goreportcard.com/report/github.com/kubernetes-sigs/kustomize)

 Download a binary from the [release page], or see
-these [instructions](https://kubernetes-sigs.github.io/kustomize/installation/).
+these [instructions](docs/INSTALL.md).

-Browse the [docs](https://kubernetes-sigs.github.io/kustomize/) or jump right into the
+Browse the [docs](docs) or jump right into the
 tested [examples](examples).

-## kubectl integration
+kustomize [v2.0.3] is available in [kubectl v1.15][kubectl].

-Since [v1.14][kubectl announcement] the kustomize build system has been included in kubectl.
-
-| kubectl version | kustomize version |
-|---------|--------|
-| v1.16.0 | [v2.0.3](/../../tree/v2.0.3) |
-| v1.15.x | [v2.0.3](/../../tree/v2.0.3) |
-| v1.14.x | [v2.0.3](/../../tree/v2.0.3) |
-
-For examples and guides for using the kubectl integration please see the [kubectl book] or the [kubernetes documentation].

 ## Usage

@@ -106,7 +98,7 @@ Take the work from step (1) above, move it into a
 `someApp` subdirectory called `base`, then
 place overlays in a sibling directory.

-An overlay is just another kustomization, referring to
+An overlay is just another kustomization, refering to
 the base, and referring to patches to apply to that
 base.

@@ -132,8 +124,20 @@ The YAML can be directly [applied] to a cluster:

 ## Community

- [file a bug](https://kubernetes-sigs.github.io/kustomize/contributing/bugs/) instructions
- [contribute a feature](https://kubernetes-sigs.github.io/kustomize/contributing/features/) instructions
+To file bugs please read [this](docs/bugs.md).
+
+Before working on an implementation, please
+
+ * Read the [eschewed feature list].
+ * File an issue describing
+   how the new feature would behave
+   and label it [kind/feature].
+
+### Other communication channels
+
+- [Slack]
+- [Mailing List]
+- General kubernetes [community page]

 ### Code of conduct

@@ -142,27 +146,30 @@ is governed by the [Kubernetes Code of Conduct].

 [`make`]: https://www.gnu.org/software/make
 [`sed`]: https://www.gnu.org/software/sed
-[DAM]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#declarative-application-management
+[DAM]: docs/glossary.md#declarative-application-management
 [KEP]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/0008-kustomize.md
 [Kubernetes Code of Conduct]: code-of-conduct.md
-[applied]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#apply
-[base]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#base
-[declarative configuration]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#declarative-application-management
+[Mailing List]: https://groups.google.com/forum/#!forum/kubernetes-sig-cli
+[Slack]: https://kubernetes.slack.com/messages/sig-cli
+[applied]: docs/glossary.md#apply
+[base]: docs/glossary.md#base
+[community page]: http://kubernetes.io/community/
+[declarative configuration]: docs/glossary.md#declarative-application-management
+[eschewed feature list]: docs/eschewedFeatures.md
 [imageBase]: docs/images/base.jpg
 [imageOverlay]: docs/images/overlay.jpg
-[kubectl announcement]: https://kubernetes.io/blog/2019/03/25/kubernetes-1-14-release-announcement
-[kubectl book]: https://kubectl.docs.kubernetes.io/pages/app_customization/introduction.html
-[kubernetes documentation]: https://kubernetes.io/docs/tasks/manage-kubernetes-objects/kustomization/
-[kubernetes style]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#kubernetes-style-object
-[kustomization]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#kustomization
-[overlay]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#overlay
-[overlays]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#overlay
+[kind/feature]: https://github.com/kubernetes-sigs/kustomize/labels/kind%2Ffeature
+[kubectl]: https://kubernetes.io/blog/2019/03/25/kubernetes-1-14-release-announcement
+[kubernetes style]: docs/glossary.md#kubernetes-style-object
+[kustomization]: docs/glossary.md#kustomization
+[overlay]: docs/glossary.md#overlay
+[overlays]: docs/glossary.md#overlay
 [release page]: https://github.com/kubernetes-sigs/kustomize/releases
-[resource]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#resource
-[resources]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#resource
+[resource]: docs/glossary.md#resource
+[resources]: docs/glossary.md#resource
 [sig-cli]: https://github.com/kubernetes/community/blob/master/sig-cli/README.md
-[variant]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#variant
-[variants]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#variant
+[variant]: docs/glossary.md#variant
+[variants]: docs/glossary.md#variant
 [v2.0.3]: https://github.com/kubernetes-sigs/kustomize/releases/tag/v2.0.3
 [v2.1.0]: https://github.com/kubernetes-sigs/kustomize/releases/tag/v2.1.0
-[workflows]: https://kubernetes-sigs.github.io/kustomize/guides
+[workflows]: docs/workflows.md
--- a/api/builtins/AnnotationsTransformer.go
+++ b/api/builtins/AnnotationsTransformer.go
@@ -1,42 +0,0 @@
-// Code generated by pluginator on AnnotationsTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/annotations"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-// Add the given annotations to the given field specifications.
-type AnnotationsTransformerPlugin struct {
-	Annotations map[string]string `json:"annotations,omitempty" yaml:"annotations,omitempty"`
-	FieldSpecs  []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-func (p *AnnotationsTransformerPlugin) Config(
-	_ *resmap.PluginHelpers, c []byte) (err error) {
-	p.Annotations = nil
-	p.FieldSpecs = nil
-	return yaml.Unmarshal(c, p)
-}
-
-func (p *AnnotationsTransformerPlugin) Transform(m resmap.ResMap) error {
-	for _, r := range m.Resources() {
-		err := filtersutil.ApplyToJSON(annotations.Filter{
-			Annotations: p.Annotations,
-			FsSlice:     p.FieldSpecs,
-		}, r)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func NewAnnotationsTransformerPlugin() resmap.TransformerPlugin {
-	return &AnnotationsTransformerPlugin{}
-}
--- a/api/builtins/ConfigMapGenerator.go
+++ b/api/builtins/ConfigMapGenerator.go
@@ -1,39 +0,0 @@
-// Code generated by pluginator on ConfigMapGenerator; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/kv"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/yaml"
-)
-
-type ConfigMapGeneratorPlugin struct {
-	h                *resmap.PluginHelpers
-	types.ObjectMeta `json:"metadata,omitempty" yaml:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
-	types.ConfigMapArgs
-}
-
-func (p *ConfigMapGeneratorPlugin) Config(h *resmap.PluginHelpers, config []byte) (err error) {
-	p.ConfigMapArgs = types.ConfigMapArgs{}
-	err = yaml.Unmarshal(config, p)
-	if p.ConfigMapArgs.Name == "" {
-		p.ConfigMapArgs.Name = p.Name
-	}
-	if p.ConfigMapArgs.Namespace == "" {
-		p.ConfigMapArgs.Namespace = p.Namespace
-	}
-	p.h = h
-	return
-}
-
-func (p *ConfigMapGeneratorPlugin) Generate() (resmap.ResMap, error) {
-	return p.h.ResmapFactory().FromConfigMapArgs(
-		kv.NewLoader(p.h.Loader(), p.h.Validator()), p.ConfigMapArgs)
-}
-
-func NewConfigMapGeneratorPlugin() resmap.GeneratorPlugin {
-	return &ConfigMapGeneratorPlugin{}
-}
--- a/api/builtins/HashTransformer.go
+++ b/api/builtins/HashTransformer.go
@@ -1,39 +0,0 @@
-// Code generated by pluginator on HashTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/ifc"
-	"sigs.k8s.io/kustomize/api/resmap"
-)
-
-type HashTransformerPlugin struct {
-	hasher ifc.KunstructuredHasher
-}
-
-func (p *HashTransformerPlugin) Config(
-	h *resmap.PluginHelpers, _ []byte) (err error) {
-	p.hasher = h.ResmapFactory().RF().Hasher()
-	return nil
-}
-
-// Transform appends hash to generated resources.
-func (p *HashTransformerPlugin) Transform(m resmap.ResMap) error {
-	for _, res := range m.Resources() {
-		if res.NeedHashSuffix() {
-			h, err := p.hasher.Hash(res)
-			if err != nil {
-				return err
-			}
-			res.SetName(fmt.Sprintf("%s-%s", res.GetName(), h))
-		}
-	}
-	return nil
-}
-
-func NewHashTransformerPlugin() resmap.TransformerPlugin {
-	return &HashTransformerPlugin{}
-}
--- a/api/builtins/LabelTransformer.go
+++ b/api/builtins/LabelTransformer.go
@@ -1,42 +0,0 @@
-// Code generated by pluginator on LabelTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/labels"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-// Add the given labels to the given field specifications.
-type LabelTransformerPlugin struct {
-	Labels     map[string]string `json:"labels,omitempty" yaml:"labels,omitempty"`
-	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-func (p *LabelTransformerPlugin) Config(
-	_ *resmap.PluginHelpers, c []byte) (err error) {
-	p.Labels = nil
-	p.FieldSpecs = nil
-	return yaml.Unmarshal(c, p)
-}
-
-func (p *LabelTransformerPlugin) Transform(m resmap.ResMap) error {
-	for _, r := range m.Resources() {
-		err := filtersutil.ApplyToJSON(labels.Filter{
-			Labels:  p.Labels,
-			FsSlice: p.FieldSpecs,
-		}, r)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func NewLabelTransformerPlugin() resmap.TransformerPlugin {
-	return &LabelTransformerPlugin{}
-}
--- a/api/builtins/NamespaceTransformer.go
+++ b/api/builtins/NamespaceTransformer.go
@@ -1,150 +0,0 @@
-// Code generated by pluginator on NamespaceTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/filters/namespace"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-// Change or set the namespace of non-cluster level resources.
-type NamespaceTransformerPlugin struct {
-	types.ObjectMeta `json:"metadata,omitempty" yaml:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
-	FieldSpecs       []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-
-	// YAMLSupport can be set to true to use the kyaml filter instead of the
-	// kunstruct transformer.
-	// TODO: change the default to use kyaml when it is stable
-	YAMLSupport bool `json:"yamlSupport,omitempty" yaml:"yamlSupport,omitempty"`
-}
-
-func (p *NamespaceTransformerPlugin) Config(
-	_ *resmap.PluginHelpers, c []byte) (err error) {
-	p.Namespace = ""
-	p.FieldSpecs = nil
-	return yaml.Unmarshal(c, p)
-}
-
-func (p *NamespaceTransformerPlugin) Transform(m resmap.ResMap) error {
-	if len(p.Namespace) == 0 {
-		return nil
-	}
-	for _, r := range m.Resources() {
-		if len(r.Map()) == 0 {
-			// Don't mutate empty objects?
-			continue
-		}
-
-		id := r.OrgId()
-
-		if p.YAMLSupport {
-			// use the new style transform
-			err := filtersutil.ApplyToJSON(namespace.Filter{
-				Namespace: p.Namespace,
-				FsSlice:   p.FieldSpecs,
-			}, r)
-			if err != nil {
-				return err
-			}
-		} else {
-			// use the old style transform
-			applicableFs := p.applicableFieldSpecs(id)
-			for _, fs := range applicableFs {
-				err := transform.MutateField(
-					r.Map(), fs.PathSlice(), fs.CreateIfNotPresent,
-					p.changeNamespace(r))
-				if err != nil {
-					return err
-				}
-			}
-		}
-
-		matches := m.GetMatchingResourcesByCurrentId(r.CurId().Equals)
-		if len(matches) != 1 {
-			return fmt.Errorf(
-				"namespace transformation produces ID conflict: %+v", matches)
-		}
-	}
-	return nil
-}
-
-// Special casing metadata.namespace since
-// all objects have it, even "ClusterKind" objects
-// that don't exist in a namespace (the Namespace
-// object itself doesn't live in a namespace).
-func (p *NamespaceTransformerPlugin) applicableFieldSpecs(id resid.ResId) []types.FieldSpec {
-	var res []types.FieldSpec
-	for _, fs := range p.FieldSpecs {
-		if id.IsSelected(&fs.Gvk) &&
-			(fs.Path != types.MetadataNamespacePath ||
-				(fs.Path == types.MetadataNamespacePath && id.IsNamespaceableKind())) {
-			res = append(res, fs)
-		}
-	}
-	return res
-}
-
-func (p *NamespaceTransformerPlugin) changeNamespace(
-	_ *resource.Resource) func(in interface{}) (interface{}, error) {
-	return func(in interface{}) (interface{}, error) {
-		switch in.(type) {
-		case string:
-			// will happen when the metadata/namespace
-			// value is replaced
-			return p.Namespace, nil
-		case []interface{}:
-			l, _ := in.([]interface{})
-			for idx, item := range l {
-				switch item.(type) {
-				case map[string]interface{}:
-					// Will happen when mutating the subjects
-					// field of ClusterRoleBinding and RoleBinding
-					inMap, _ := item.(map[string]interface{})
-					if _, ok := inMap["name"]; !ok {
-						continue
-					}
-					name, ok := inMap["name"].(string)
-					if !ok {
-						continue
-					}
-					// The only case we need to force the namespace
-					// if for the "service account". "default" is
-					// kind of hardcoded here for right now.
-					if name != "default" {
-						continue
-					}
-					inMap["namespace"] = p.Namespace
-					l[idx] = inMap
-				default:
-					// nothing to do for right now
-				}
-			}
-			return in, nil
-		case map[string]interface{}:
-			// Will happen if the createField=true
-			// when the namespace is added to the
-			// object
-			inMap := in.(map[string]interface{})
-			if len(inMap) == 0 {
-				return p.Namespace, nil
-			} else {
-				return in, nil
-			}
-		default:
-			return in, nil
-		}
-	}
-}
-
-func NewNamespaceTransformerPlugin() resmap.TransformerPlugin {
-	return &NamespaceTransformerPlugin{}
-}
--- a/api/builtins/PatchJson6902Transformer.go
+++ b/api/builtins/PatchJson6902Transformer.go
@@ -1,110 +0,0 @@
-// Code generated by pluginator on PatchJson6902Transformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-
-	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/filters/patchjson6902"
-	"sigs.k8s.io/kustomize/api/ifc"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-type PatchJson6902TransformerPlugin struct {
-	ldr          ifc.Loader
-	decodedPatch jsonpatch.Patch
-	Target       types.PatchTarget `json:"target,omitempty" yaml:"target,omitempty"`
-	Path         string            `json:"path,omitempty" yaml:"path,omitempty"`
-	JsonOp       string            `json:"jsonOp,omitempty" yaml:"jsonOp,omitempty"`
-
-	YAMLSupport bool `json:"yamlSupport,omitempty" yaml:"yamlSupport,omitempty"`
-}
-
-func (p *PatchJson6902TransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	p.ldr = h.Loader()
-	err = yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	if p.Target.Name == "" {
-		return fmt.Errorf("must specify the target name")
-	}
-	if p.Path == "" && p.JsonOp == "" {
-		return fmt.Errorf("empty file path and empty jsonOp")
-	}
-	if p.Path != "" {
-		if p.JsonOp != "" {
-			return fmt.Errorf("must specify a file path or jsonOp, not both")
-		}
-		rawOp, err := p.ldr.Load(p.Path)
-		if err != nil {
-			return err
-		}
-		p.JsonOp = string(rawOp)
-		if p.JsonOp == "" {
-			return fmt.Errorf("patch file '%s' empty seems to be empty", p.Path)
-		}
-	}
-	if p.JsonOp[0] != '[' {
-		// if it doesn't seem to be JSON, imagine
-		// it is YAML, and convert to JSON.
-		op, err := yaml.YAMLToJSON([]byte(p.JsonOp))
-		if err != nil {
-			return err
-		}
-		p.JsonOp = string(op)
-	}
-	p.decodedPatch, err = jsonpatch.DecodePatch([]byte(p.JsonOp))
-	if err != nil {
-		return errors.Wrapf(err, "decoding %s", p.JsonOp)
-	}
-	if len(p.decodedPatch) == 0 {
-		return fmt.Errorf(
-			"patch appears to be empty; file=%s, JsonOp=%s", p.Path, p.JsonOp)
-	}
-	return err
-}
-
-func (p *PatchJson6902TransformerPlugin) Transform(m resmap.ResMap) error {
-	id := resid.NewResIdWithNamespace(
-		resid.Gvk{
-			Group:   p.Target.Group,
-			Version: p.Target.Version,
-			Kind:    p.Target.Kind,
-		},
-		p.Target.Name,
-		p.Target.Namespace,
-	)
-	obj, err := m.GetById(id)
-	if err != nil {
-		return err
-	}
-	if !p.YAMLSupport {
-		rawObj, err := obj.MarshalJSON()
-		if err != nil {
-			return err
-		}
-		modifiedObj, err := p.decodedPatch.Apply(rawObj)
-		if err != nil {
-			return errors.Wrapf(
-				err, "failed to apply json patch '%s'", p.JsonOp)
-		}
-		return obj.UnmarshalJSON(modifiedObj)
-	} else {
-		return filtersutil.ApplyToJSON(patchjson6902.Filter{
-			Patch: p.JsonOp,
-		}, obj)
-	}
-}
-
-func NewPatchJson6902TransformerPlugin() resmap.TransformerPlugin {
-	return &PatchJson6902TransformerPlugin{}
-}
--- a/api/builtins/PatchStrategicMergeTransformer.go
+++ b/api/builtins/PatchStrategicMergeTransformer.go
@@ -1,108 +0,0 @@
-// Code generated by pluginator on PatchStrategicMergeTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-type PatchStrategicMergeTransformerPlugin struct {
-	h             *resmap.PluginHelpers
-	loadedPatches []*resource.Resource
-	Paths         []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
-	Patches       string                      `json:"patches,omitempty" yaml:"patches,omitempty"`
-
-	YAMLSupport bool `json:"yamlSupport,omitempty" yaml:"yamlSupport,omitempty"`
-}
-
-func (p *PatchStrategicMergeTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	p.h = h
-	err = yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	if len(p.Paths) == 0 && p.Patches == "" {
-		return fmt.Errorf("empty file path and empty patch content")
-	}
-	if len(p.Paths) != 0 {
-		for _, onePath := range p.Paths {
-			res, err := p.h.ResmapFactory().RF().SliceFromBytes([]byte(onePath))
-			if err == nil {
-				p.loadedPatches = append(p.loadedPatches, res...)
-				continue
-			}
-			res, err = p.h.ResmapFactory().RF().SliceFromPatches(
-				p.h.Loader(), []types.PatchStrategicMerge{onePath})
-			if err != nil {
-				return err
-			}
-			p.loadedPatches = append(p.loadedPatches, res...)
-		}
-	}
-	if p.Patches != "" {
-		res, err := p.h.ResmapFactory().RF().SliceFromBytes([]byte(p.Patches))
-		if err != nil {
-			return err
-		}
-		p.loadedPatches = append(p.loadedPatches, res...)
-	}
-
-	if len(p.loadedPatches) == 0 {
-		return fmt.Errorf(
-			"patch appears to be empty; files=%v, Patch=%s", p.Paths, p.Patches)
-	}
-	return err
-}
-
-func (p *PatchStrategicMergeTransformerPlugin) Transform(m resmap.ResMap) error {
-	patches, err := p.h.ResmapFactory().MergePatches(p.loadedPatches)
-	if err != nil {
-		return err
-	}
-	for _, patch := range patches.Resources() {
-		target, err := m.GetById(patch.OrgId())
-		if err != nil {
-			return err
-		}
-		if !p.YAMLSupport {
-			err = target.Patch(patch.Copy())
-			if err != nil {
-				return err
-			}
-			// remove the resource from resmap
-			// when the patch is to $patch: delete that target
-			if len(target.Map()) == 0 {
-				err = m.Remove(target.CurId())
-				if err != nil {
-					return err
-				}
-			}
-		} else {
-			patchCopy := patch.DeepCopy()
-			patchCopy.SetName(target.GetName())
-			patchCopy.SetNamespace(target.GetNamespace())
-			patchCopy.SetGvk(target.GetGvk())
-			node, err := filtersutil.GetRNode(patchCopy)
-			if err != nil {
-				return err
-			}
-			err = filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-				Patch: node,
-			}, target)
-		}
-	}
-	return nil
-}
-
-func NewPatchStrategicMergeTransformerPlugin() resmap.TransformerPlugin {
-	return &PatchStrategicMergeTransformerPlugin{}
-}
--- a/api/builtins/PatchTransformer.go
+++ b/api/builtins/PatchTransformer.go
@@ -1,193 +0,0 @@
-// Code generated by pluginator on PatchTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-	"strings"
-
-	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/filters/patchjson6902"
-	"sigs.k8s.io/kustomize/api/filters/patchstrategicmerge"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-type PatchTransformerPlugin struct {
-	loadedPatch  *resource.Resource
-	decodedPatch jsonpatch.Patch
-	Path         string          `json:"path,omitempty" yaml:"path,omitempty"`
-	Patch        string          `json:"patch,omitempty" yaml:"patch,omitempty"`
-	Target       *types.Selector `json:"target,omitempty" yaml:"target,omitempty"`
-
-	YAMLSupport bool `json:"yamlSupport,omitempty" yaml:"yamlSupport,omitempty"`
-}
-
-func (p *PatchTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) error {
-	err := yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	p.Patch = strings.TrimSpace(p.Patch)
-	if p.Patch == "" && p.Path == "" {
-		return fmt.Errorf(
-			"must specify one of patch and path in\n%s", string(c))
-	}
-	if p.Patch != "" && p.Path != "" {
-		return fmt.Errorf(
-			"patch and path can't be set at the same time\n%s", string(c))
-	}
-
-	if p.Path != "" {
-		loaded, loadErr := h.Loader().Load(p.Path)
-		if loadErr != nil {
-			return loadErr
-		}
-		p.Patch = string(loaded)
-	}
-
-	patchSM, errSM := h.ResmapFactory().RF().FromBytes([]byte(p.Patch))
-	patchJson, errJson := jsonPatchFromBytes([]byte(p.Patch))
-	if (errSM == nil && errJson == nil) ||
-		(patchSM != nil && patchJson != nil) {
-		return fmt.Errorf(
-			"illegally qualifies as both an SM and JSON patch: [%v]",
-			p.Patch)
-	}
-	if errSM != nil && errJson != nil {
-		return fmt.Errorf(
-			"unable to parse SM or JSON patch from [%v]", p.Patch)
-	}
-	if errSM == nil {
-		p.loadedPatch = patchSM
-	} else {
-		p.decodedPatch = patchJson
-	}
-	return nil
-}
-
-func (p *PatchTransformerPlugin) Transform(m resmap.ResMap) error {
-	if p.loadedPatch != nil {
-		// The patch was a strategic merge patch
-		return p.transformStrategicMerge(m, p.loadedPatch)
-	} else {
-		return p.transformJson6902(m, p.decodedPatch)
-	}
-}
-
-// transformStrategicMerge applies the provided strategic merge patch
-// to all the resources in the ResMap that match either the Target or
-// the identifier of the patch.
-func (p *PatchTransformerPlugin) transformStrategicMerge(m resmap.ResMap, patch *resource.Resource) error {
-	if p.Target == nil {
-		target, err := m.GetById(patch.OrgId())
-		if err != nil {
-			return err
-		}
-		return p.applySMPatch(target, patch)
-	}
-
-	resources, err := m.Select(*p.Target)
-	if err != nil {
-		return err
-	}
-	for _, res := range resources {
-		patchCopy := patch.DeepCopy()
-		patchCopy.SetName(res.GetName())
-		patchCopy.SetNamespace(res.GetNamespace())
-		patchCopy.SetGvk(res.GetGvk())
-		err := p.applySMPatch(res, patchCopy)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// applySMPatch applies the provided strategic merge patch to the
-// given resource. Depending on the value of YAMLSupport, it will either
-// use the legacy implementation or the kyaml-based solution.
-func (p *PatchTransformerPlugin) applySMPatch(resource, patch *resource.Resource) error {
-	if !p.YAMLSupport {
-		return resource.Patch(patch.Copy())
-	} else {
-		node, err := filtersutil.GetRNode(patch)
-		if err != nil {
-			return err
-		}
-		return filtersutil.ApplyToJSON(patchstrategicmerge.Filter{
-			Patch: node,
-		}, resource)
-	}
-}
-
-// transformJson6902 applies the provided json6902 patch
-// to all the resources in the ResMap that match the Target.
-func (p *PatchTransformerPlugin) transformJson6902(m resmap.ResMap, patch jsonpatch.Patch) error {
-	if p.Target == nil {
-		return fmt.Errorf("must specify a target for patch %s", p.Patch)
-	}
-
-	resources, err := m.Select(*p.Target)
-	if err != nil {
-		return err
-	}
-	for _, res := range resources {
-		err = p.applyJson6902Patch(res, patch)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// applyJson6902Patch applies the provided patch to the given resource.
-// Depending on the value of YAMLSupport, it will either
-// use the legacy implementation or the kyaml-based solution.
-func (p *PatchTransformerPlugin) applyJson6902Patch(resource *resource.Resource, patch jsonpatch.Patch) error {
-	if !p.YAMLSupport {
-		rawObj, err := resource.MarshalJSON()
-		if err != nil {
-			return err
-		}
-		modifiedObj, err := patch.Apply(rawObj)
-		if err != nil {
-			return errors.Wrapf(
-				err, "failed to apply json patch '%s'", p.Patch)
-		}
-		return resource.UnmarshalJSON(modifiedObj)
-	} else {
-		return filtersutil.ApplyToJSON(patchjson6902.Filter{
-			Patch: p.Patch,
-		}, resource)
-	}
-}
-
-// jsonPatchFromBytes loads a Json 6902 patch from
-// a bytes input
-func jsonPatchFromBytes(
-	in []byte) (jsonpatch.Patch, error) {
-	ops := string(in)
-	if ops == "" {
-		return nil, fmt.Errorf("empty json patch operations")
-	}
-
-	if ops[0] != '[' {
-		jsonOps, err := yaml.YAMLToJSON(in)
-		if err != nil {
-			return nil, err
-		}
-		ops = string(jsonOps)
-	}
-	return jsonpatch.DecodePatch([]byte(ops))
-}
-
-func NewPatchTransformerPlugin() resmap.TransformerPlugin {
-	return &PatchTransformerPlugin{}
-}
--- a/api/builtins/PrefixSuffixTransformer.go
+++ b/api/builtins/PrefixSuffixTransformer.go
@@ -1,123 +0,0 @@
-// Code generated by pluginator on PrefixSuffixTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"errors"
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/yaml"
-)
-
-// Add the given prefix and suffix to the field.
-type PrefixSuffixTransformerPlugin struct {
-	Prefix     string            `json:"prefix,omitempty" yaml:"prefix,omitempty"`
-	Suffix     string            `json:"suffix,omitempty" yaml:"suffix,omitempty"`
-	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-// Not placed in a file yet due to lack of demand.
-var prefixSuffixFieldSpecsToSkip = []types.FieldSpec{
-	{
-		Gvk: resid.Gvk{Kind: "CustomResourceDefinition"},
-	},
-	{
-		Gvk: resid.Gvk{Group: "apiregistration.k8s.io", Kind: "APIService"},
-	},
-}
-
-func (p *PrefixSuffixTransformerPlugin) Config(
-	_ *resmap.PluginHelpers, c []byte) (err error) {
-	p.Prefix = ""
-	p.Suffix = ""
-	p.FieldSpecs = nil
-	err = yaml.Unmarshal(c, p)
-	if err != nil {
-		return
-	}
-	if p.FieldSpecs == nil {
-		return errors.New("fieldSpecs is not expected to be nil")
-	}
-	return
-}
-
-func (p *PrefixSuffixTransformerPlugin) Transform(m resmap.ResMap) error {
-
-	// Even if both the Prefix and Suffix are empty we want
-	// to proceed with the transformation. This allows to add contextual
-	// information to the resources (AddNamePrefix and AddNameSuffix).
-
-	for _, r := range m.Resources() {
-		if p.shouldSkip(r.OrgId()) {
-			// Don't change the actual definition
-			// of a CRD.
-			continue
-		}
-		id := r.OrgId()
-		// current default configuration contains
-		// only one entry: "metadata/name" with no GVK
-		for _, path := range p.FieldSpecs {
-			if !id.IsSelected(&path.Gvk) {
-				// With the currrent default configuration,
-				// because no Gvk is specified, so a wild
-				// card
-				continue
-			}
-
-			if smellsLikeANameChange(&path) {
-				// "metadata/name" is the only field.
-				// this will add a prefix and a suffix
-				// to the resource even if those are
-				// empty
-				r.AddNamePrefix(p.Prefix)
-				r.AddNameSuffix(p.Suffix)
-			}
-
-			// the addPrefixSuffix method will not
-			// change the name if both the prefix and suffix
-			// are empty.
-			err := transform.MutateField(
-				r.Map(),
-				path.PathSlice(),
-				path.CreateIfNotPresent,
-				p.addPrefixSuffix)
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-func smellsLikeANameChange(fs *types.FieldSpec) bool {
-	return fs.Path == "metadata/name"
-}
-
-func (p *PrefixSuffixTransformerPlugin) shouldSkip(
-	id resid.ResId) bool {
-	for _, path := range prefixSuffixFieldSpecsToSkip {
-		if id.IsSelected(&path.Gvk) {
-			return true
-		}
-	}
-	return false
-}
-
-func (p *PrefixSuffixTransformerPlugin) addPrefixSuffix(
-	in interface{}) (interface{}, error) {
-	s, ok := in.(string)
-	if !ok {
-		return nil, fmt.Errorf("%#v is expected to be %T", in, s)
-	}
-	return fmt.Sprintf("%s%s%s", p.Prefix, s, p.Suffix), nil
-}
-
-func NewPrefixSuffixTransformerPlugin() resmap.TransformerPlugin {
-	return &PrefixSuffixTransformerPlugin{}
-}
--- a/api/builtins/ReplicaCountTransformer.go
+++ b/api/builtins/ReplicaCountTransformer.go
@@ -1,88 +0,0 @@
-// Code generated by pluginator on ReplicaCountTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/transform"
-
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/yaml"
-)
-
-// Find matching replicas declarations and replace the count.
-// Eases the kustomization configuration of replica changes.
-type ReplicaCountTransformerPlugin struct {
-	Replica    types.Replica     `json:"replica,omitempty" yaml:"replica,omitempty"`
-	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-func (p *ReplicaCountTransformerPlugin) Config(
-	_ *resmap.PluginHelpers, c []byte) (err error) {
-	p.Replica = types.Replica{}
-	p.FieldSpecs = nil
-	return yaml.Unmarshal(c, p)
-}
-
-func (p *ReplicaCountTransformerPlugin) Transform(m resmap.ResMap) error {
-	found := false
-	for i, replicaSpec := range p.FieldSpecs {
-		matcher := p.createMatcher(i)
-		matchOriginal := m.GetMatchingResourcesByOriginalId(matcher)
-		matchCurrent := m.GetMatchingResourcesByCurrentId(matcher)
-
-		for _, res := range append(matchOriginal, matchCurrent...) {
-			found = true
-			err := transform.MutateField(
-				res.Map(), replicaSpec.PathSlice(),
-				replicaSpec.CreateIfNotPresent, p.addReplicas)
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	if !found {
-		gvks := make([]string, len(p.FieldSpecs))
-		for i, replicaSpec := range p.FieldSpecs {
-			gvks[i] = replicaSpec.Gvk.String()
-		}
-		return fmt.Errorf("resource with name %s does not match a config with the following GVK %v",
-			p.Replica.Name, gvks)
-	}
-
-	return nil
-}
-
-// Match Replica.Name and FieldSpec
-func (p *ReplicaCountTransformerPlugin) createMatcher(i int) resmap.IdMatcher {
-	return func(r resid.ResId) bool {
-		return r.Name == p.Replica.Name &&
-			r.Gvk.IsSelected(&p.FieldSpecs[i].Gvk)
-	}
-}
-
-func (p *ReplicaCountTransformerPlugin) addReplicas(in interface{}) (interface{}, error) {
-	switch m := in.(type) {
-	case int64:
-		// Was already in the field.
-	case map[string]interface{}:
-		if len(m) != 0 {
-			// A map was already in the replicas field, don't want to
-			// discard this data silently.
-			return nil, fmt.Errorf("%#v is expected to be %T", in, m)
-		}
-		// Just got added, default type is map, but we can return anything.
-	default:
-		return nil, fmt.Errorf("%#v is expected to be %T", in, m)
-	}
-	return p.Replica.Count, nil
-}
-
-func NewReplicaCountTransformerPlugin() resmap.TransformerPlugin {
-	return &ReplicaCountTransformerPlugin{}
-}
--- a/api/builtins/SecretGenerator.go
+++ b/api/builtins/SecretGenerator.go
@@ -1,39 +0,0 @@
-// Code generated by pluginator on SecretGenerator; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/kv"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/yaml"
-)
-
-type SecretGeneratorPlugin struct {
-	h                *resmap.PluginHelpers
-	types.ObjectMeta `json:"metadata,omitempty" yaml:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
-	types.SecretArgs
-}
-
-func (p *SecretGeneratorPlugin) Config(h *resmap.PluginHelpers, config []byte) (err error) {
-	p.SecretArgs = types.SecretArgs{}
-	err = yaml.Unmarshal(config, p)
-	if p.SecretArgs.Name == "" {
-		p.SecretArgs.Name = p.Name
-	}
-	if p.SecretArgs.Namespace == "" {
-		p.SecretArgs.Namespace = p.Namespace
-	}
-	p.h = h
-	return
-}
-
-func (p *SecretGeneratorPlugin) Generate() (resmap.ResMap, error) {
-	return p.h.ResmapFactory().FromSecretArgs(
-		kv.NewLoader(p.h.Loader(), p.h.Validator()), p.SecretArgs)
-}
-
-func NewSecretGeneratorPlugin() resmap.GeneratorPlugin {
-	return &SecretGeneratorPlugin{}
-}
--- a/api/builtins/ValueAddTransformer.go
+++ b/api/builtins/ValueAddTransformer.go
@@ -1,142 +0,0 @@
-// Code generated by pluginator on ValueAddTransformer; DO NOT EDIT.
-// pluginator {unknown  1970-01-01T00:00:00Z  }
-
-package builtins
-
-import (
-	"fmt"
-	"path/filepath"
-	"strings"
-
-	"sigs.k8s.io/kustomize/api/filters/namespace"
-	"sigs.k8s.io/kustomize/api/filters/valueadd"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
-	"sigs.k8s.io/yaml"
-)
-
-// An 'Add' transformer inspired by the IETF RFC 6902 JSON spec Add operation.
-type ValueAddTransformerPlugin struct {
-	// Value is the value to add.
-	// Defaults to base name of encompassing kustomization root.
-	Value string `json:"value,omitempty" yaml:"value,omitempty"`
-
-	// Targets is a slice of targets that should have the value added.
-	Targets []Target `json:"targets,omitempty" yaml:"targets,omitempty"`
-
-	// TargetFilePath is a file path.  If specified, the file will be parsed into
-	// a slice of Target, and appended to anything that was specified in the
-	// Targets field.  This is just a means to share common target specifications.
-	TargetFilePath string `json:"targetFilePath,omitempty" yaml:"targetFilePath,omitempty"`
-}
-
-// Target describes where to put the value.
-type Target struct {
-	// Selector selects the resources to modify.
-	Selector *types.Selector `json:"selector,omitempty" yaml:"selector,omitempty"`
-
-	// NotSelector selects the resources to exclude
-	// from those included by overly broad selectors.
-	// TODO: implement this?
-	// NotSelector *types.Selector `json:"notSelector,omitempty" yaml:"notSelector,omitempty"`
-
-	// FieldPath is a JSON-style path to the field intended to hold the value.
-	FieldPath string `json:"fieldPath,omitempty" yaml:"fieldPath,omitempty"`
-
-	// FilePathPosition is passed to the filter directly.  Look there for doc.
-	FilePathPosition int `json:"filePathPosition,omitempty" yaml:"filePathPosition,omitempty"`
-}
-
-func (p *ValueAddTransformerPlugin) Config(h *resmap.PluginHelpers, c []byte) error {
-	err := yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	p.Value = strings.TrimSpace(p.Value)
-	if p.Value == "" {
-		p.Value = filepath.Base(h.Loader().Root())
-	}
-	if p.TargetFilePath != "" {
-		bytes, err := h.Loader().Load(p.TargetFilePath)
-		if err != nil {
-			return err
-		}
-		var targets struct {
-			Targets []Target `json:"targets,omitempty" yaml:"targets,omitempty"`
-		}
-		err = yaml.Unmarshal(bytes, &targets)
-		if err != nil {
-			return err
-		}
-		p.Targets = append(p.Targets, targets.Targets...)
-	}
-	if len(p.Targets) == 0 {
-		return fmt.Errorf("must specify at least one target")
-	}
-	for _, target := range p.Targets {
-		if err = validateSelector(target.Selector); err != nil {
-			return err
-		}
-		// TODO: call validateSelector(target.NotSelector) if field added.
-		if err = validateJsonFieldPath(target.FieldPath); err != nil {
-			return err
-		}
-		if target.FilePathPosition < 0 {
-			return fmt.Errorf(
-				"value of FilePathPosition (%d) cannot be negative",
-				target.FilePathPosition)
-		}
-	}
-	return nil
-}
-
-// TODO: implement
-func validateSelector(_ *types.Selector) error {
-	return nil
-}
-
-// TODO: Enforce RFC 6902?
-func validateJsonFieldPath(p string) error {
-	if len(p) == 0 {
-		return fmt.Errorf("fieldPath cannot be empty")
-	}
-	return nil
-}
-
-func (p *ValueAddTransformerPlugin) Transform(m resmap.ResMap) (err error) {
-	for _, t := range p.Targets {
-		var resources []*resource.Resource
-		if t.Selector == nil {
-			resources = m.Resources()
-		} else {
-			resources, err = m.Select(*t.Selector)
-			if err != nil {
-				return err
-			}
-		}
-		// TODO: consider t.NotSelector if implemented
-		for _, res := range resources {
-			if t.FieldPath == types.MetadataNamespacePath {
-				err = filtersutil.ApplyToJSON(namespace.Filter{
-					Namespace: p.Value,
-				}, res)
-			} else {
-				err = filtersutil.ApplyToJSON(valueadd.Filter{
-					Value:            p.Value,
-					FieldPath:        t.FieldPath,
-					FilePathPosition: t.FilePathPosition,
-				}, res)
-			}
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-func NewValueAddTransformerPlugin() resmap.TransformerPlugin {
-	return &ValueAddTransformerPlugin{}
-}
--- a/api/builtins/doc.go
+++ b/api/builtins/doc.go
@@ -1,8 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package builtins holds code generated from the builtin plugins.
-// The "builtin" plugins are written as normal plugins and can
-// be used as such, but they are also used to generate the code
-// in this package so they can be statically linked to client code.
-package builtins
--- a/api/filesys/confirmeddir.go
+++ b/api/filesys/confirmeddir.go
@@ -1,79 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"io/ioutil"
-	"path/filepath"
-	"strings"
-)
-
-// ConfirmedDir is a clean, absolute, delinkified path
-// that was confirmed to point to an existing directory.
-type ConfirmedDir string
-
-// NewTmpConfirmedDir returns a temporary dir, else error.
-// The directory is cleaned, no symlinks, etc. so it's
-// returned as a ConfirmedDir.
-func NewTmpConfirmedDir() (ConfirmedDir, error) {
-	n, err := ioutil.TempDir("", "kustomize-")
-	if err != nil {
-		return "", err
-	}
-
-	// In MacOs `ioutil.TempDir` creates a directory
-	// with root in the `/var` folder, which is in turn
-	// a symlinked path to `/private/var`.
-	// Function `filepath.EvalSymlinks`is used to
-	// resolve the real absolute path.
-	deLinked, err := filepath.EvalSymlinks(n)
-	return ConfirmedDir(deLinked), err
-}
-
-// HasPrefix returns true if the directory argument
-// is a prefix of self (d) from the point of view of
-// a file system.
-//
-// I.e., it's true if the argument equals or contains
-// self (d) in a file path sense.
-//
-// HasPrefix emulates the semantics of strings.HasPrefix
-// such that the following are true:
-//
-//   strings.HasPrefix("foobar", "foobar")
-//   strings.HasPrefix("foobar", "foo")
-//   strings.HasPrefix("foobar", "")
-//
-//   d := fSys.ConfirmDir("/foo/bar")
-//   d.HasPrefix("/foo/bar")
-//   d.HasPrefix("/foo")
-//   d.HasPrefix("/")
-//
-// Not contacting a file system here to check for
-// actual path existence.
-//
-// This is tested on linux, but will have trouble
-// on other operating systems.
-// TODO(monopole) Refactor when #golang/go/18358 closes.
-// See also:
-//   https://github.com/golang/go/issues/18358
-//   https://github.com/golang/dep/issues/296
-//   https://github.com/golang/dep/blob/master/internal/fs/fs.go#L33
-//   https://codereview.appspot.com/5712045
-func (d ConfirmedDir) HasPrefix(path ConfirmedDir) bool {
-	if path.String() == string(filepath.Separator) || path == d {
-		return true
-	}
-	return strings.HasPrefix(
-		string(d),
-		string(path)+string(filepath.Separator))
-}
-
-func (d ConfirmedDir) Join(path string) string {
-	return filepath.Join(string(d), path)
-}
-
-func (d ConfirmedDir) String() string {
-	return string(d)
-}
--- a/api/filesys/file.go
+++ b/api/filesys/file.go
@@ -1,15 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"io"
-	"os"
-)
-
-// File groups the basic os.File methods.
-type File interface {
-	io.ReadWriteCloser
-	Stat() (os.FileInfo, error)
-}
--- a/api/filesys/fileinfo.go
+++ b/api/filesys/fileinfo.go
@@ -1,34 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"os"
-	"time"
-)
-
-var _ os.FileInfo = fileInfo{}
-
-// fileInfo implements os.FileInfo for a fileInMemory instance.
-type fileInfo struct {
-	node *fsNode
-}
-
-// Name returns the name of the file
-func (fi fileInfo) Name() string { return fi.node.Name() }
-
-// Size returns the size of the file
-func (fi fileInfo) Size() int64 { return fi.node.Size() }
-
-// Mode returns the file mode
-func (fi fileInfo) Mode() os.FileMode { return 0777 }
-
-// ModTime returns a bogus time
-func (fi fileInfo) ModTime() time.Time { return time.Time{} }
-
-// IsDir returns true if it is a directory
-func (fi fileInfo) IsDir() bool { return fi.node.isNodeADir() }
-
-// Sys should return underlying data source, but it now returns nil
-func (fi fileInfo) Sys() interface{} { return nil }
--- a/api/filesys/fileondisk.go
+++ b/api/filesys/fileondisk.go
@@ -1,27 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"os"
-)
-
-var _ File = &fileOnDisk{}
-
-// fileOnDisk implements File using the local filesystem.
-type fileOnDisk struct {
-	file *os.File
-}
-
-// Close closes a file.
-func (f *fileOnDisk) Close() error { return f.file.Close() }
-
-// Read reads a file's content.
-func (f *fileOnDisk) Read(p []byte) (n int, err error) { return f.file.Read(p) }
-
-// Write writes bytes to a file
-func (f *fileOnDisk) Write(p []byte) (n int, err error) { return f.file.Write(p) }
-
-// Stat returns an interface which has all the information regarding the file.
-func (f *fileOnDisk) Stat() (os.FileInfo, error) { return f.file.Stat() }
--- a/api/filesys/filesystem.go
+++ b/api/filesys/filesystem.go
@@ -1,50 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package filesys provides a file system abstraction layer.
-package filesys
-
-import (
-	"path/filepath"
-)
-
-const (
-	Separator = string(filepath.Separator)
-	SelfDir   = "."
-	ParentDir = ".."
-)
-
-// FileSystem groups basic os filesystem methods.
-// It's supposed be functional subset of https://golang.org/pkg/os
-type FileSystem interface {
-	// Create a file.
-	Create(path string) (File, error)
-	// MkDir makes a directory.
-	Mkdir(path string) error
-	// MkDirAll makes a directory path, creating intervening directories.
-	MkdirAll(path string) error
-	// RemoveAll removes path and any children it contains.
-	RemoveAll(path string) error
-	// Open opens the named file for reading.
-	Open(path string) (File, error)
-	// IsDir returns true if the path is a directory.
-	IsDir(path string) bool
-	// CleanedAbs converts the given path into a
-	// directory and a file name, where the directory
-	// is represented as a ConfirmedDir and all that implies.
-	// If the entire path is a directory, the file component
-	// is an empty string.
-	CleanedAbs(path string) (ConfirmedDir, string, error)
-	// Exists is true if the path exists in the file system.
-	Exists(path string) bool
-	// Glob returns the list of matching files,
-	// emulating https://golang.org/pkg/path/filepath/#Glob
-	Glob(pattern string) ([]string, error)
-	// ReadFile returns the contents of the file at the given path.
-	ReadFile(path string) ([]byte, error)
-	// WriteFile writes the data to a file at the given path,
-	// overwriting anything that's already there.
-	WriteFile(path string, data []byte) error
-	// Walk walks the file system with the given WalkFunc.
-	Walk(path string, walkFn filepath.WalkFunc) error
-}
--- a/api/filesys/fsnode.go
+++ b/api/filesys/fsnode.go
@@ -1,557 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"bytes"
-	"fmt"
-	"log"
-	"os"
-	"path/filepath"
-	"regexp"
-	"sort"
-	"strings"
-
-	"github.com/pkg/errors"
-)
-
-var _ File = &fsNode{}
-var _ FileSystem = &fsNode{}
-
-// fsNode is either a file or a directory.
-type fsNode struct {
-	// What node owns me?
-	parent *fsNode
-
-	// Value to return as the Name() when the
-	// parent is nil.
-	nilParentName string
-
-	// A directory mapping names to nodes.
-	// If dir is nil, then self node is a file.
-	// If dir is non-nil, then self node is a directory,
-	// albeit possibly an empty directory.
-	dir map[string]*fsNode
-
-	// if this node is a file, this is the content.
-	content []byte
-
-	// if this node is a file, this tracks whether or
-	// not it is "open".
-	open bool
-}
-
-// MakeEmptyDirInMemory returns an empty directory.
-// The paths of nodes in this object will never
-// report a leading Separator, meaning they
-// aren't "absolute" in the sense defined by
-// https://golang.org/pkg/path/filepath/#IsAbs.
-func MakeEmptyDirInMemory() *fsNode {
-	return &fsNode{
-		dir: make(map[string]*fsNode),
-	}
-}
-
-// MakeFsInMemory returns an empty 'file system'.
-// The paths of nodes in this object will always
-// report a leading Separator, meaning they
-// are "absolute" in the sense defined by
-// https://golang.org/pkg/path/filepath/#IsAbs.
-// This is a relevant difference when using Walk,
-// Glob, Match, etc.
-func MakeFsInMemory() FileSystem {
-	return &fsNode{
-		nilParentName: Separator,
-		dir:           make(map[string]*fsNode),
-	}
-}
-
-// Name returns the name of the node.
-func (n *fsNode) Name() string {
-	if n.parent == nil {
-		// Unable to lookup name in parent.
-		return n.nilParentName
-	}
-	if !n.parent.isNodeADir() {
-		log.Fatal("parent not a dir")
-	}
-	for key, value := range n.parent.dir {
-		if value == n {
-			return key
-		}
-	}
-	log.Fatal("unable to find fsNode name")
-	return ""
-}
-
-// Path returns the full path to the node.
-func (n *fsNode) Path() string {
-	if n.parent == nil {
-		return n.nilParentName
-	}
-	if !n.parent.isNodeADir() {
-		log.Fatal("parent not a dir, structural error")
-	}
-	return filepath.Join(n.parent.Path(), n.Name())
-}
-
-// mySplit trims trailing separators from the directory
-// result of filepath.Split.
-func mySplit(s string) (string, string) {
-	dName, fName := filepath.Split(s)
-	return StripTrailingSeps(dName), fName
-}
-
-func (n *fsNode) addFile(name string, c []byte) (result *fsNode, err error) {
-	parent := n
-	dName, fileName := mySplit(name)
-	if dName != "" {
-		parent, err = parent.addDir(dName)
-		if err != nil {
-			return nil, err
-		}
-	}
-	if !isLegalFileNameForCreation(fileName) {
-		return nil, fmt.Errorf(
-			"illegal name '%s' in file creation", fileName)
-	}
-	result, ok := parent.dir[fileName]
-	if ok {
-		// File already exists; overwrite it.
-		result.content = c
-		return result, nil
-	}
-	result = &fsNode{
-		content: c,
-		parent:  parent,
-	}
-	parent.dir[fileName] = result
-	return result, nil
-}
-
-// Create implements FileSystem.
-// Create makes an empty file.
-func (n *fsNode) Create(path string) (result File, err error) {
-	return n.AddFile(path, []byte{})
-}
-
-// WriteFile implements FileSystem.
-func (n *fsNode) WriteFile(path string, d []byte) error {
-	_, err := n.AddFile(path, d)
-	return err
-}
-
-// AddFile adds a file and any necessary containing
-// directories to the node.
-func (n *fsNode) AddFile(
-	name string, c []byte) (result *fsNode, err error) {
-	if n.dir == nil {
-		return nil, fmt.Errorf(
-			"cannot add a file to a non-directory '%s'", n.Name())
-	}
-	return n.addFile(cleanQueryPath(name), c)
-}
-
-func (n *fsNode) addDir(path string) (result *fsNode, err error) {
-	parent := n
-	dName, subDirName := mySplit(path)
-	if dName != "" {
-		parent, err = n.addDir(dName)
-		if err != nil {
-			return nil, err
-		}
-	}
-	switch subDirName {
-	case "", SelfDir:
-		return n, nil
-	case ParentDir:
-		if n.parent == nil {
-			return nil, fmt.Errorf(
-				"cannot add a directory above '%s'", n.Path())
-		}
-		return n.parent, nil
-	default:
-		if !isLegalFileNameForCreation(subDirName) {
-			return nil, fmt.Errorf(
-				"illegal name '%s' in directory creation", subDirName)
-		}
-		result, ok := parent.dir[subDirName]
-		if ok {
-			if result.isNodeADir() {
-				// it's already there.
-				return result, nil
-			}
-			return nil, fmt.Errorf(
-				"cannot make dir '%s'; a file of that name already exists in '%s'",
-				subDirName, parent.Name())
-		}
-		result = &fsNode{
-			dir:    make(map[string]*fsNode),
-			parent: parent,
-		}
-		parent.dir[subDirName] = result
-		return result, nil
-	}
-}
-
-// Mkdir implements FileSystem.
-// Mkdir creates a directory.
-func (n *fsNode) Mkdir(path string) error {
-	_, err := n.AddDir(path)
-	return err
-}
-
-// MkdirAll implements FileSystem.
-// MkdirAll creates a directory.
-func (n *fsNode) MkdirAll(path string) error {
-	_, err := n.AddDir(path)
-	return err
-}
-
-// AddDir adds a directory to the node, not complaining
-// if it is already there.
-func (n *fsNode) AddDir(path string) (result *fsNode, err error) {
-	if n.dir == nil {
-		return nil, fmt.Errorf(
-			"cannot add a directory to file node '%s'", n.Name())
-	}
-	return n.addDir(cleanQueryPath(path))
-}
-
-// CleanedAbs implements FileSystem.
-func (n *fsNode) CleanedAbs(path string) (ConfirmedDir, string, error) {
-	node, err := n.Find(path)
-	if err != nil {
-		return "", "", errors.Wrap(err, "unable to clean")
-	}
-	if node == nil {
-		return "", "", fmt.Errorf("'%s' doesn't exist", path)
-	}
-	if node.isNodeADir() {
-		return ConfirmedDir(node.Path()), "", nil
-	}
-	return ConfirmedDir(node.parent.Path()), node.Name(), nil
-}
-
-// Exists implements FileSystem.
-// Exists returns true if the path exists.
-func (n *fsNode) Exists(path string) bool {
-	if !n.isNodeADir() {
-		return n.Name() == path
-	}
-	result, err := n.Find(path)
-	if err != nil {
-		return false
-	}
-	return result != nil
-}
-
-func cleanQueryPath(path string) string {
-	// Always ignore leading separator?
-	// Remember that filepath.Clean returns "." if
-	// given an empty string argument.
-	return filepath.Clean(StripLeadingSeps(path))
-}
-
-// Find finds the given node, else nil if not found.
-// Return error on structural/argument errors.
-func (n *fsNode) Find(path string) (*fsNode, error) {
-	if !n.isNodeADir() {
-		return nil, fmt.Errorf("can only find inside a dir")
-	}
-	if path == "" {
-		// Special case; check *before* cleaning and *before*
-		// comparison to nilParentName.
-		return nil, nil
-	}
-	if (n.parent == nil && path == n.nilParentName) || path == SelfDir {
-		// Special case
-		return n, nil
-	}
-	return n.findIt(cleanQueryPath(path))
-}
-
-func (n *fsNode) findIt(path string) (result *fsNode, err error) {
-	parent := n
-	dName, item := mySplit(path)
-	if dName != "" {
-		parent, err = n.findIt(dName)
-		if err != nil {
-			return nil, err
-		}
-		if parent == nil {
-			// all done, target doesn't exist.
-			return nil, nil
-		}
-	}
-	if !parent.isNodeADir() {
-		return nil, fmt.Errorf("'%s' is not a directory", parent.Path())
-	}
-	return parent.dir[item], nil
-}
-
-// RemoveAll implements FileSystem.
-// RemoveAll removes an item and everything it contains.
-func (n *fsNode) RemoveAll(path string) error {
-	result, err := n.Find(path)
-	if err != nil {
-		return err
-	}
-	if result == nil {
-		return fmt.Errorf("cannot find '%s' to remove it", path)
-	}
-	return result.Remove()
-}
-
-// Remove drop the node, and everything it contains, from its parent.
-func (n *fsNode) Remove() error {
-	if n.parent == nil {
-		return fmt.Errorf("cannot remove a root node")
-	}
-	if !n.parent.isNodeADir() {
-		log.Fatal("parent not a dir")
-	}
-	for key, value := range n.parent.dir {
-		if value == n {
-			delete(n.parent.dir, key)
-			return nil
-		}
-	}
-	log.Fatal("unable to find self in parent")
-	return nil
-}
-
-// isNodeADir returns true if the node is a directory.
-// Cannot collide with the poorly named "IsDir".
-func (n *fsNode) isNodeADir() bool {
-	return n.dir != nil
-}
-
-// IsDir implements FileSystem.
-// IsDir returns true if the argument resolves
-// to a directory rooted at the node.
-func (n *fsNode) IsDir(path string) bool {
-	result, err := n.Find(path)
-	if err != nil || result == nil {
-		return false
-	}
-	return result.isNodeADir()
-}
-
-// Size returns the size of the node.
-func (n *fsNode) Size() int64 {
-	if n.isNodeADir() {
-		return int64(len(n.dir))
-	}
-	return int64(len(n.content))
-}
-
-// Open implements FileSystem.
-// Open opens the node for reading (just marks it).
-func (n *fsNode) Open(path string) (File, error) {
-	result, err := n.Find(path)
-	if err != nil {
-		return nil, err
-	}
-	if result == nil {
-		return nil, fmt.Errorf("cannot find '%s' to open it", path)
-	}
-	result.open = true
-	return result, nil
-}
-
-// Close marks the node closed.
-func (n *fsNode) Close() error {
-	n.open = false
-	return nil
-}
-
-// ReadFile implements FileSystem.
-func (n *fsNode) ReadFile(path string) (c []byte, err error) {
-	result, err := n.Find(path)
-	if err != nil {
-		return nil, err
-	}
-	if result == nil {
-		return nil, fmt.Errorf("cannot find '%s' to read it", path)
-	}
-	c = make([]byte, len(result.content))
-	_, err = result.Read(c)
-	return c, err
-}
-
-// Read returns the content of the file node.
-func (n *fsNode) Read(d []byte) (c int, err error) {
-	if n.isNodeADir() {
-		return 0, fmt.Errorf(
-			"cannot read content from non-file '%s'", n.Path())
-	}
-	return copy(d, n.content), nil
-}
-
-// Write saves the contents of the argument to the file node.
-func (n *fsNode) Write(p []byte) (c int, err error) {
-	if n.isNodeADir() {
-		return 0, fmt.Errorf(
-			"cannot write content to non-file '%s'", n.Path())
-	}
-	n.content = make([]byte, len(p))
-	return copy(n.content, p), nil
-}
-
-// ContentMatches returns true if v matches fake file's content.
-func (n *fsNode) ContentMatches(v []byte) bool {
-	return bytes.Equal(v, n.content)
-}
-
-// GetContent the content of a fake file.
-func (n *fsNode) GetContent() []byte {
-	return n.content
-}
-
-// Stat returns an instance of FileInfo.
-func (n *fsNode) Stat() (os.FileInfo, error) {
-	return fileInfo{node: n}, nil
-}
-
-// Walk implements FileSystem.
-func (n *fsNode) Walk(path string, walkFn filepath.WalkFunc) error {
-	result, err := n.Find(path)
-	if err != nil {
-		return err
-	}
-	if result == nil {
-		return fmt.Errorf("cannot find '%s' to walk it", path)
-	}
-	return result.WalkMe(walkFn)
-}
-
-// Walk runs the given walkFn on each node.
-func (n *fsNode) WalkMe(walkFn filepath.WalkFunc) error {
-	fi, err := n.Stat()
-	// always visit self first
-	err = walkFn(n.Path(), fi, err)
-	if !n.isNodeADir() {
-		// it's a file, so nothing more to do
-		return err
-	}
-	// process self as a directory
-	if err == filepath.SkipDir {
-		return nil
-	}
-	// Walk is supposed to visit in lexical order.
-	for _, k := range n.sortedDirEntries() {
-		if err := n.dir[k].WalkMe(walkFn); err != nil {
-			if err == filepath.SkipDir {
-				// stop processing this directory
-				break
-			}
-			// bail out completely
-			return err
-		}
-	}
-	return nil
-}
-
-func (n *fsNode) sortedDirEntries() []string {
-	keys := make([]string, len(n.dir))
-	i := 0
-	for k := range n.dir {
-		keys[i] = k
-		i++
-	}
-	sort.Strings(keys)
-	return keys
-}
-
-// FileCount returns a count of files.
-// Directories, empty or otherwise, not counted.
-func (n *fsNode) FileCount() int {
-	count := 0
-	n.WalkMe(func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-		if !info.IsDir() {
-			count++
-		}
-		return nil
-	})
-	return count
-}
-
-func (n *fsNode) DebugPrint() {
-	n.WalkMe(func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			fmt.Printf("err '%v' at path %q\n", err, path)
-			return nil
-		}
-		if info.IsDir() {
-			if info.Size() == 0 {
-				fmt.Println("empty dir: " + path)
-			}
-		} else {
-			fmt.Println("     file: " + path)
-		}
-		return nil
-	})
-}
-
-var legalFileNamePattern = regexp.MustCompile("^[a-zA-Z0-9-_.]+$")
-
-// This rules enforced here should be simpler and tighter
-// than what's allowed on a real OS.
-// Should be fine for testing or in-memory purposes.
-func isLegalFileNameForCreation(n string) bool {
-	if n == "" || n == SelfDir || !legalFileNamePattern.MatchString(n) {
-		return false
-	}
-	return !strings.Contains(n, ParentDir)
-}
-
-// RegExpGlob returns a list of file paths matching the regexp.
-// Excludes directories.
-func (n *fsNode) RegExpGlob(pattern string) ([]string, error) {
-	var result []string
-	var expression = regexp.MustCompile(pattern)
-	n.WalkMe(func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-		if !info.IsDir() {
-			if expression.MatchString(path) {
-				result = append(result, path)
-			}
-		}
-		return nil
-	})
-	sort.Strings(result)
-	return result, nil
-}
-
-// Glob implements FileSystem.
-// Glob returns the list of file paths matching
-// per filepath.Match semantics, i.e. unlike RegExpGlob,
-// Match("foo/a*") will not match sub-sub directories of foo.
-// This is how /bin/ls behaves.
-func (n *fsNode) Glob(pattern string) ([]string, error) {
-	var result []string
-	n.WalkMe(func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-		if !info.IsDir() {
-			match, err := filepath.Match(pattern, path)
-			if err != nil {
-				return err
-			}
-			if match {
-				result = append(result, path)
-			}
-		}
-		return nil
-	})
-	sort.Strings(result)
-	return result, nil
-}
--- a/api/filesys/fsnode_test.go
+++ b/api/filesys/fsnode_test.go
@@ -1,788 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-	"testing"
-)
-
-const content = `
-Lorem ipsum dolor sit amet,
-consectetur adipiscing elit,
-sed do eiusmod tempor incididunt
-ut labore et dolore magna aliqua.
-`
-const shortContent = "hi"
-
-var topCases = []pathCase{
-	{
-		what:   "dotdot",
-		arg:    ParentDir,
-		errStr: "illegal name '..' in file creation",
-	},
-	{
-		what:   "empty",
-		arg:    "",
-		name:   "",
-		errStr: "illegal name '.' in file creation",
-	},
-	{
-		what: "simple",
-		arg:  "bob",
-		name: "bob",
-		path: "bob",
-	},
-	{
-		what: "longer",
-		arg:  filepath.Join("longer", "bob"),
-		name: "bob",
-		path: filepath.Join("longer", "bob"),
-	},
-	{
-		what: "longer yet",
-		arg:  filepath.Join("longer", "foo", "bar", "beans", "bob"),
-		name: "bob",
-		path: filepath.Join("longer", "foo", "bar", "beans", "bob"),
-	},
-	{
-		what: "tricky",
-		arg:  filepath.Join("bob", ParentDir, "sally"),
-		name: "sally",
-		path: "sally",
-	},
-	{
-		what: "trickier",
-		arg:  filepath.Join("bob", "sally", ParentDir, ParentDir, "jean"),
-		name: "jean",
-		path: "jean",
-	},
-}
-
-func TestMakeEmptyDirInMemory(t *testing.T) {
-	n := MakeEmptyDirInMemory()
-	if !n.isNodeADir() {
-		t.Fatalf("not a directory")
-	}
-	if n.Size() != 0 {
-		t.Fatalf("unexpected size %d", n.Size())
-	}
-	if n.Name() != "" {
-		t.Fatalf("unexpected name '%s'", n.Name())
-	}
-	if n.Path() != "" {
-		t.Fatalf("unexpected path '%s'", n.Path())
-	}
-	runBasicOperations(
-		t, "MakeEmptyDirInMemory", false, topCases, n)
-}
-
-func TestMakeFsInMemory(t *testing.T) {
-	runBasicOperations(
-		t, "MakeFsInMemory", true, topCases, MakeFsInMemory())
-}
-
-//nolint:gocyclo
-func runBasicOperations(
-	t *testing.T, tName string, isFSysRooted bool,
-	cases []pathCase, fSys FileSystem) {
-	buff := make([]byte, 500)
-	for _, c := range cases {
-		err := fSys.WriteFile(c.arg, []byte(content))
-		if c.errStr != "" {
-			if err == nil {
-				t.Fatalf("%s; expected error writing to  '%s'!", c.what, c.arg)
-			}
-			if !strings.Contains(err.Error(), c.errStr) {
-				t.Fatalf("%s; expected err containing '%s', got '%v'",
-					c.what, c.errStr, err)
-			}
-			continue
-		}
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if !fSys.Exists(c.path) {
-			t.Fatalf("%s; expect existence of '%s'", c.what, c.path)
-		}
-		stuff, err := fSys.ReadFile(c.path)
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if string(stuff) != content {
-			t.Fatalf("%s; unexpected content '%s'", c.what, stuff)
-		}
-		f, err := fSys.Open(c.arg)
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		fi, err := f.Stat()
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if fi.Name() != c.name {
-			t.Fatalf("%s; expected name '%s', got '%s'", c.what, c.name, fi.Name())
-		}
-		count, err := f.Read(buff)
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if string(buff[:count]) != content {
-			t.Fatalf("%s; unexpected buff '%s'", c.what, buff)
-		}
-		count, err = f.Write([]byte(shortContent))
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if count != len(shortContent) {
-			t.Fatalf("%s; unexpected count: %d", c.what, len(shortContent))
-		}
-		stuff, err = fSys.ReadFile(c.path)
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		if string(stuff) != shortContent {
-			t.Fatalf("%s; unexpected content '%s'", c.what, stuff)
-		}
-	}
-
-	var actualPaths []string
-	var err error
-	prefix := ""
-	{
-		root := SelfDir
-		if isFSysRooted {
-			root = Separator
-			prefix = Separator
-		}
-		err = fSys.Walk(root, func(path string, info os.FileInfo, err error) error {
-			if err != nil {
-				fmt.Printf("err '%v' at path %q\n", err, path)
-				return nil
-			}
-			if !info.IsDir() {
-				actualPaths = append(actualPaths, path)
-			}
-			return nil
-		})
-	}
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-	var expectedPaths []string
-	for _, c := range cases {
-		if c.errStr == "" {
-			expectedPaths = append(expectedPaths, prefix+c.path)
-		}
-	}
-	sort.Strings(expectedPaths)
-	assertEqualStringSlices(t, expectedPaths, actualPaths, tName)
-}
-
-type pathCase struct {
-	what   string
-	arg    string
-	name   string
-	path   string
-	errStr string
-}
-
-func TestAddDir(t *testing.T) {
-	cases := []pathCase{
-		{
-			what:   "dotdot",
-			arg:    ParentDir,
-			errStr: "cannot add a directory above ''",
-		},
-		{
-			what: "empty",
-			arg:  "",
-			name: "",
-			path: "",
-		},
-		{
-			what: "simple",
-			arg:  "bob",
-			name: "bob",
-			path: "bob",
-		},
-		{
-			what: "longer",
-			arg:  filepath.Join("longer", "bob"),
-			name: "bob",
-			path: filepath.Join("longer", "bob"),
-		},
-		{
-			what: "longer yet",
-			arg:  filepath.Join("longer", "foo", "bar", "beans", "bob"),
-			name: "bob",
-			path: filepath.Join("longer", "foo", "bar", "beans", "bob"),
-		},
-		{
-			what: "tricky",
-			arg:  filepath.Join("bob", ParentDir, "sally"),
-			name: "sally",
-			path: "sally",
-		},
-		{
-			what: "trickier",
-			arg:  filepath.Join("bob", "sally", ParentDir, ParentDir, "jean"),
-			name: "jean",
-			path: "jean",
-		},
-	}
-	for _, c := range cases {
-		n := MakeEmptyDirInMemory()
-		f, err := n.AddDir(c.arg)
-		if c.errStr != "" {
-			if err == nil {
-				t.Fatalf("%s; expected error!", c.what)
-			}
-			if !strings.Contains(err.Error(), c.errStr) {
-				t.Fatalf(
-					"%s; expected error with '%s', got '%v'",
-					c.what, c.errStr, err)
-			}
-			continue
-		}
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", c.what, err)
-		}
-		checkNode(t, c.what, f, c.name, 0, true, c.path)
-		checkOsStat(t, c.what, f, f.Name(), 0, true)
-	}
-}
-
-var bagOfCases = []pathCase{
-	{
-		what:   "empty",
-		arg:    "",
-		errStr: "illegal name '.' in file creation",
-	},
-	{
-		what: "simple",
-		arg:  "bob",
-		name: "bob",
-		path: "bob",
-	},
-	{
-		what: "longer",
-		arg:  filepath.Join("longer", "bob"),
-		name: "bob",
-		path: filepath.Join("longer", "bob"),
-	},
-	{
-		what: "longer",
-		arg:  filepath.Join("longer", "sally"),
-		name: "sally",
-		path: filepath.Join("longer", "sally"),
-	},
-	{
-		what: "even longer",
-		arg:  filepath.Join("longer", "than", "the", "other", "bob"),
-		name: "bob",
-		path: filepath.Join("longer", "than", "the", "other", "bob"),
-	},
-	{
-		what: "even longer",
-		arg:  filepath.Join("even", "much", "longer", "than", "the", "other", "bob"),
-		name: "bob",
-		path: filepath.Join("even", "much", "longer", "than", "the", "other", "bob"),
-	},
-}
-
-func TestAddFile(t *testing.T) {
-	n := MakeEmptyDirInMemory()
-	if n.FileCount() != 0 {
-		t.Fatalf("expected no files, got %d", n.FileCount())
-	}
-	expectedFileCount := 0
-	for _, c := range bagOfCases {
-		f, err := n.AddFile(c.arg, []byte(content))
-		if c.errStr != "" {
-			if err == nil {
-				t.Fatalf("%s; expected error!", c.what)
-			}
-			if !strings.Contains(err.Error(), c.errStr) {
-				t.Fatalf("%s; expected err containing '%s', got '%v'",
-					c.what, c.errStr, err)
-			}
-			continue
-		}
-		if err != nil {
-			t.Fatalf("%s; unexpected error %v", c.what, err)
-		}
-		checkNode(t, c.what, f, c.name, len(content), false, c.path)
-		checkOsStat(t, c.what, f, f.Name(), len(content), false)
-
-		result, err := n.Find(c.arg)
-		if err != nil {
-			t.Fatalf("%s; unexpected find error %v", c.what, err)
-		}
-		if result != f {
-			t.Fatalf("%s; unexpected find result %v", c.what, result)
-		}
-
-		result, err = n.Find(filepath.Join("longer", "bogus"))
-		if err != nil {
-			t.Fatalf("%s; unexpected find error %v", c.what, err)
-		}
-		if result != nil {
-			t.Fatalf("%s; unexpected find result %v", c.what, result)
-		}
-
-		expectedFileCount++
-		fc := n.FileCount()
-		if fc != expectedFileCount {
-			t.Fatalf("expected file count %d, got %d",
-				expectedFileCount, fc)
-		}
-	}
-}
-
-func checkNode(
-	t *testing.T, what string, f *fsNode, name string,
-	size int, isDir bool, path string) {
-	if f.isNodeADir() != isDir {
-		t.Fatalf("%s; unexpected isNodeADir = %v", what, f.isNodeADir())
-	}
-	if f.Size() != int64(size) {
-		t.Fatalf("%s; unexpected size %d", what, f.Size())
-	}
-	if name != f.Name() {
-		t.Fatalf("%s; expected name '%s', got '%s'", what, name, f.Name())
-	}
-	if path != f.Path() {
-		t.Fatalf("%s; expected path '%s', got '%s'", what, path, f.Path())
-	}
-}
-
-func checkOsStat(
-	t *testing.T, what string, f File, name string,
-	size int, isDir bool) {
-	info, err := f.Stat()
-	if err != nil {
-		t.Fatalf("%s; unexpected stat error %v", what, err)
-	}
-	if info.IsDir() != isDir {
-		t.Fatalf("%s; unexpected info.isNodeADir = %v", what, info.IsDir())
-	}
-	if info.Size() != int64(size) {
-		t.Fatalf("%s; unexpected info.size %d", what, info.Size())
-	}
-	if info.Name() != name {
-		t.Fatalf("%s; expected name '%s', got info.Name '%s'", what, name, info.Name())
-	}
-}
-
-var bunchOfFiles = []struct {
-	path     string
-	addAsDir bool
-}{
-	{
-		path: filepath.Join("b", "e", "a", "c", "g"),
-	},
-	{
-		path: filepath.Join("z", "r", "a", "b", "g"),
-	},
-	{
-		path: filepath.Join("b", "q", "a", "c", "g"),
-	},
-	{
-		path:     filepath.Join("b", "a", "a", "m", "g"),
-		addAsDir: true,
-	},
-	{
-		path: filepath.Join("b", "w"),
-	},
-	{
-		path: filepath.Join("b", "d", "a", "c", "m"),
-	},
-	{
-		path: filepath.Join("b", "d", "z"),
-	},
-	{
-		path: filepath.Join("b", "d", "y"),
-	},
-	{
-		path: filepath.Join("b", "d", "ignore", "c", "n"),
-	},
-	{
-		path: filepath.Join("b", "d", "x"),
-	},
-	{
-		path: filepath.Join("b", "d", "ignore", "c", "o"),
-	},
-	{
-		path: filepath.Join("b", "d", "ignore", "c", "m"),
-	},
-	{
-		path:     filepath.Join("b", "d", "a", "c", "i"),
-		addAsDir: true,
-	},
-	{
-		path: filepath.Join("x"),
-	},
-	{
-		path: filepath.Join("y"),
-	},
-	{
-		path: filepath.Join("b", "d", "a", "c", "i", "beans"),
-	},
-	{
-		path:     filepath.Join("b", "d", "a", "c", "r", "w"),
-		addAsDir: true,
-	},
-	{
-		path: filepath.Join("b", "d", "a", "c", "u"),
-	},
-}
-
-func makeLoadedFileTree(t *testing.T) *fsNode {
-	n := MakeEmptyDirInMemory()
-	var err error
-	expectedFileCount := 0
-	for _, item := range bunchOfFiles {
-		if item.addAsDir {
-			_, err = n.AddDir(item.path)
-		} else {
-			_, err = n.AddFile(item.path, []byte(content))
-			expectedFileCount++
-		}
-		if err != nil {
-			t.Fatalf("unexpected error %v", err)
-		}
-	}
-	fc := n.FileCount()
-	if fc != expectedFileCount {
-		t.Fatalf("expected file count %d, got %d",
-			expectedFileCount, fc)
-	}
-	return n
-}
-
-func TestWalkMe(t *testing.T) {
-	n := makeLoadedFileTree(t)
-	var actualPaths []string
-	err := n.WalkMe(func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			fmt.Printf("err '%v' at path %q\n", err, path)
-			return nil
-		}
-		if info.IsDir() {
-			if info.Name() == "ignore" {
-				return filepath.SkipDir
-			}
-		} else {
-			actualPaths = append(actualPaths, path)
-		}
-		return nil
-	})
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-	var expectedPaths []string
-	for _, c := range bunchOfFiles {
-		if !c.addAsDir && !strings.Contains(c.path, "ignore") {
-			expectedPaths = append(expectedPaths, c.path)
-		}
-	}
-	sort.Strings(expectedPaths)
-	assertEqualStringSlices(t, expectedPaths, actualPaths, "testWalkMe")
-}
-
-func TestRemove(t *testing.T) {
-	n := makeLoadedFileTree(t)
-	orgCount := n.FileCount()
-
-	// Remove the "ignore" directory and everything below it.
-	path := filepath.Join("b", "d", "ignore")
-	result, err := n.Find(path)
-	if err != nil {
-		t.Fatalf("%s; unexpected error %v", path, err)
-	}
-	if result == nil {
-		t.Fatalf("%s; expected to find '%s'", path, path)
-	}
-	if !result.isNodeADir() {
-		t.Fatalf("%s; expected to find a directory", path)
-	}
-	err = result.Remove()
-	if err != nil {
-		t.Fatalf("%s; unable to remove: %v", path, err)
-	}
-	result, err = n.Find(path)
-	if err != nil {
-		// Just because it's gone doesn't mean error.
-		t.Fatalf("%s; unexpected error %v", path, err)
-	}
-	if result != nil {
-		t.Fatalf("%s; should not have been able to find '%s'", path, path)
-	}
-
-	// There were three files below "ignore".
-	orgCount -= 3
-
-	// Now drop one more for a total of four dropped.
-	result, _ = n.Find(filepath.Join("y"))
-	err = result.Remove()
-	if err != nil {
-		t.Fatalf("%s; unable to remove: %v", path, err)
-	}
-	orgCount -= 1
-
-	fc := n.FileCount()
-	if fc != orgCount {
-		t.Fatalf("expected file count %d, got %d",
-			orgCount, fc)
-	}
-}
-
-func TestExists(t *testing.T) {
-	n := makeLoadedFileTree(t)
-	path := filepath.Join("b", "d", "a")
-	if !n.Exists(path) {
-		t.Fatalf("expected existence at %s", path)
-	}
-	if !n.IsDir(path) {
-		t.Fatalf("expected directory at %s", path)
-	}
-}
-
-func TestRegExpGlob(t *testing.T) {
-	n := makeLoadedFileTree(t)
-	expected := []string{
-		filepath.Join("b", "d", "a", "c", "i", "beans"),
-		filepath.Join("b", "d", "a", "c", "m"),
-		filepath.Join("b", "d", "a", "c", "u"),
-		filepath.Join("b", "d", "ignore", "c", "m"),
-		filepath.Join("b", "d", "ignore", "c", "n"),
-		filepath.Join("b", "d", "ignore", "c", "o"),
-		filepath.Join("b", "d", "x"),
-		filepath.Join("b", "d", "y"),
-		filepath.Join("b", "d", "z"),
-	}
-	paths, err := n.RegExpGlob("b/d/*")
-	if err != nil {
-		t.Fatalf("glob error: %v", err)
-	}
-	assertEqualStringSlices(t, expected, paths, "glob test")
-}
-
-func TestGlob(t *testing.T) {
-	n := makeLoadedFileTree(t)
-	expected := []string{
-		filepath.Join("b", "d", "x"),
-		filepath.Join("b", "d", "y"),
-		filepath.Join("b", "d", "z"),
-	}
-	paths, err := n.Glob("b/d/*")
-	if err != nil {
-		t.Fatalf("glob error: %v", err)
-	}
-	assertEqualStringSlices(t, expected, paths, "glob test")
-}
-
-func assertEqualStringSlices(t *testing.T, expected, actual []string, message string) {
-	if len(expected) != len(actual) {
-		t.Fatalf(
-			"%s; unequal sizes; len(expected)=%d, len(actual)=%d\n%+v\n%+v\n",
-			message, len(expected), len(actual), expected, actual)
-	}
-	for i := range expected {
-		if expected[i] != actual[i] {
-			t.Fatalf(
-				"%s; unequal entries; expected=%s, actual=%s",
-				message, expected[i], actual[i])
-		}
-	}
-}
-
-func TestFind(t *testing.T) {
-	cases := []struct {
-		what       string
-		arg        string
-		expectDir  bool
-		expectFile bool
-		errStr     string
-	}{
-		{
-			what: "garbage",
-			arg:  "///1(*&SA",
-		},
-		{
-			what: "simple",
-			arg:  "bob",
-		},
-		{
-			what: "no directory",
-			arg:  filepath.Join("b", "rrrrrr"),
-		},
-		{
-			what:      "is a directory",
-			arg:       filepath.Join("b", "d", "ignore"),
-			expectDir: true,
-		},
-		{
-			what:       "longer, ending in file",
-			arg:        filepath.Join("b", "d", "x"),
-			expectFile: true,
-		},
-		{
-			what:       "moar longer, ending in file",
-			arg:        filepath.Join("b", "d", "a", "c", "u"),
-			expectFile: true,
-		},
-		{
-			what:      "directory",
-			arg:       filepath.Join("b"),
-			expectDir: true,
-		},
-		{
-			// Querying for the empty string could
-			// 1) be an error,
-			// 2) return no result (and no error) as with
-			//    any illegal and therefore non-existent
-			//    file name,
-			// 3) return the node itself, like running
-			//    'ls' with no argument.
-			// Going with option 2 (no result, no error),
-			// since at this low level it makes more sense
-			// if the results for the empty string query
-			// differ from the results for the "." query.
-			what: "empty name",
-			arg:  "",
-		},
-		{
-			what:      "self dir",
-			arg:       SelfDir,
-			expectDir: true,
-		},
-		{
-			what: "parent dir - doesn't exist",
-			arg:  ParentDir,
-		},
-		{
-			what: "many parents - doesn't exist",
-			arg:  filepath.Join(ParentDir, ParentDir, ParentDir),
-		},
-	}
-
-	n := makeLoadedFileTree(t)
-	for _, item := range cases {
-		result, err := n.Find(item.arg)
-		if item.errStr != "" {
-			if err == nil {
-				t.Fatalf("%s; expected error", item.what)
-			}
-			if !strings.Contains(err.Error(), item.errStr) {
-				t.Fatalf("%s; expected err containing '%s', got '%v'",
-					item.what, item.errStr, err)
-			}
-			continue
-		}
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", item.what, err)
-		}
-		if result == nil {
-			if item.expectDir {
-				t.Fatalf(
-					"%s; expected to find directory '%s'", item.what, item.arg)
-			}
-			if item.expectFile {
-				t.Fatalf(
-					"%s; expected to find file '%s'", item.what, item.arg)
-			}
-			continue
-		}
-		if item.expectDir {
-			if !result.isNodeADir() {
-				t.Fatalf(
-					"%s; expected '%s' to be a directory", item.what, item.arg)
-			}
-			continue
-		}
-		if item.expectFile {
-			if result.isNodeADir() {
-				t.Fatalf("%s; expected '%s' to be a file", item.what, item.arg)
-			}
-			continue
-		}
-		t.Fatalf(
-			"%s; expected nothing for '%s', but got '%s'",
-			item.what, item.arg, result.Path())
-	}
-}
-
-func TestCleanedAbs(t *testing.T) {
-	cases := []struct {
-		what   string
-		full   string
-		cDir   string
-		name   string
-		errStr string
-	}{
-		{
-			what:   "empty",
-			full:   "",
-			errStr: "doesn't exist",
-		},
-		{
-			what:   "simple",
-			full:   "bob",
-			errStr: "'bob' doesn't exist",
-		},
-		{
-			what:   "no directory",
-			full:   filepath.Join("b", "rrrrrr"),
-			errStr: "'b/rrrrrr' doesn't exist",
-		},
-		{
-			what: "longer, ending in file",
-			full: filepath.Join("b", "d", "x"),
-			cDir: filepath.Join("b", "d"),
-			name: "x",
-		},
-		{
-			what: "moar longer, ending in file",
-			full: filepath.Join("b", "d", "a", "c", "u"),
-			cDir: filepath.Join("b", "d", "a", "c"),
-			name: "u",
-		},
-		{
-			what: "directory",
-			full: filepath.Join("b", "d"),
-			cDir: filepath.Join("b", "d"),
-			name: "",
-		},
-	}
-
-	n := makeLoadedFileTree(t)
-	for _, item := range cases {
-		cDir, name, err := n.CleanedAbs(item.full)
-		if item.errStr != "" {
-			if err == nil {
-				t.Fatalf("%s; expected error", item.what)
-			}
-			if !strings.Contains(err.Error(), item.errStr) {
-				t.Fatalf("%s; expected err containing '%s', got '%v'",
-					item.what, item.errStr, err)
-			}
-			continue
-		}
-		if err != nil {
-			t.Fatalf("%s; unexpected error: %v", item.what, err)
-		}
-		if cDir != ConfirmedDir(item.cDir) {
-			t.Fatalf("%s; expected cDir=%s, got '%s'", item.what, item.cDir, cDir)
-		}
-		if name != item.name {
-			t.Fatalf("%s; expected name=%s, got '%s'", item.what, item.name, name)
-		}
-	}
-}
--- a/api/filesys/fsondisk.go
+++ b/api/filesys/fsondisk.go
@@ -1,114 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"fmt"
-	"io/ioutil"
-	"log"
-	"os"
-	"path/filepath"
-)
-
-var _ FileSystem = fsOnDisk{}
-
-// fsOnDisk implements FileSystem using the local filesystem.
-type fsOnDisk struct{}
-
-// MakeFsOnDisk makes an instance of fsOnDisk.
-func MakeFsOnDisk() FileSystem {
-	return fsOnDisk{}
-}
-
-// Create delegates to os.Create.
-func (fsOnDisk) Create(name string) (File, error) { return os.Create(name) }
-
-// Mkdir delegates to os.Mkdir.
-func (fsOnDisk) Mkdir(name string) error {
-	return os.Mkdir(name, 0777|os.ModeDir)
-}
-
-// MkdirAll delegates to os.MkdirAll.
-func (fsOnDisk) MkdirAll(name string) error {
-	return os.MkdirAll(name, 0777|os.ModeDir)
-}
-
-// RemoveAll delegates to os.RemoveAll.
-func (fsOnDisk) RemoveAll(name string) error {
-	return os.RemoveAll(name)
-}
-
-// Open delegates to os.Open.
-func (fsOnDisk) Open(name string) (File, error) { return os.Open(name) }
-
-// CleanedAbs converts the given path into a
-// directory and a file name, where the directory
-// is represented as a ConfirmedDir and all that implies.
-// If the entire path is a directory, the file component
-// is an empty string.
-func (x fsOnDisk) CleanedAbs(
-	path string) (ConfirmedDir, string, error) {
-	absRoot, err := filepath.Abs(path)
-	if err != nil {
-		return "", "", fmt.Errorf(
-			"abs path error on '%s' : %v", path, err)
-	}
-	deLinked, err := filepath.EvalSymlinks(absRoot)
-	if err != nil {
-		return "", "", fmt.Errorf(
-			"evalsymlink failure on '%s' : %v", path, err)
-	}
-	if x.IsDir(deLinked) {
-		return ConfirmedDir(deLinked), "", nil
-	}
-	d := filepath.Dir(deLinked)
-	if !x.IsDir(d) {
-		// Programmer/assumption error.
-		log.Fatalf("first part of '%s' not a directory", deLinked)
-	}
-	if d == deLinked {
-		// Programmer/assumption error.
-		log.Fatalf("d '%s' should be a subset of deLinked", d)
-	}
-	f := filepath.Base(deLinked)
-	if filepath.Join(d, f) != deLinked {
-		// Programmer/assumption error.
-		log.Fatalf("these should be equal: '%s', '%s'",
-			filepath.Join(d, f), deLinked)
-	}
-	return ConfirmedDir(d), f, nil
-}
-
-// Exists returns true if os.Stat succeeds.
-func (fsOnDisk) Exists(name string) bool {
-	_, err := os.Stat(name)
-	return err == nil
-}
-
-// Glob returns the list of matching files
-func (fsOnDisk) Glob(pattern string) ([]string, error) {
-	return filepath.Glob(pattern)
-}
-
-// IsDir delegates to os.Stat and FileInfo.IsDir
-func (fsOnDisk) IsDir(name string) bool {
-	info, err := os.Stat(name)
-	if err != nil {
-		return false
-	}
-	return info.IsDir()
-}
-
-// ReadFile delegates to ioutil.ReadFile.
-func (fsOnDisk) ReadFile(name string) ([]byte, error) { return ioutil.ReadFile(name) }
-
-// WriteFile delegates to ioutil.WriteFile with read/write permissions.
-func (fsOnDisk) WriteFile(name string, c []byte) error {
-	return ioutil.WriteFile(name, c, 0666)
-}
-
-// Walk delegates to filepath.Walk.
-func (fsOnDisk) Walk(path string, walkFn filepath.WalkFunc) error {
-	return filepath.Walk(path, walkFn)
-}
--- a/api/filesys/fsondisk_test.go
+++ b/api/filesys/fsondisk_test.go
@@ -1,165 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys_test
-
-import (
-	"io/ioutil"
-	"os"
-	"path"
-	"path/filepath"
-	"reflect"
-	"testing"
-
-	. "sigs.k8s.io/kustomize/api/filesys"
-)
-
-func makeTestDir(t *testing.T) (FileSystem, string) {
-	fSys := MakeFsOnDisk()
-	td, err := ioutil.TempDir("", "kustomize_testing_dir")
-	if err != nil {
-		t.Fatalf("unexpected error %s", err)
-	}
-	testDir, err := filepath.EvalSymlinks(td)
-	if err != nil {
-		t.Fatalf("unexpected error %s", err)
-	}
-	if !fSys.Exists(testDir) {
-		t.Fatalf("expected existence")
-	}
-	if !fSys.IsDir(testDir) {
-		t.Fatalf("expected directory")
-	}
-	return fSys, testDir
-}
-
-func TestCleanedAbs_1(t *testing.T) {
-	fSys, testDir := makeTestDir(t)
-	defer os.RemoveAll(testDir)
-
-	d, f, err := fSys.CleanedAbs("")
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	wd, err := os.Getwd()
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	if d.String() != wd {
-		t.Fatalf("unexpected d=%s", d)
-	}
-	if f != "" {
-		t.Fatalf("unexpected f=%s", f)
-	}
-}
-
-func TestCleanedAbs_2(t *testing.T) {
-	fSys, testDir := makeTestDir(t)
-	defer os.RemoveAll(testDir)
-
-	d, f, err := fSys.CleanedAbs("/")
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	if d != "/" {
-		t.Fatalf("unexpected d=%s", d)
-	}
-	if f != "" {
-		t.Fatalf("unexpected f=%s", f)
-	}
-}
-
-func TestCleanedAbs_3(t *testing.T) {
-	fSys, testDir := makeTestDir(t)
-	defer os.RemoveAll(testDir)
-
-	err := fSys.WriteFile(
-		filepath.Join(testDir, "foo"), []byte(`foo`))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-
-	d, f, err := fSys.CleanedAbs(filepath.Join(testDir, "foo"))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	if d.String() != testDir {
-		t.Fatalf("unexpected d=%s", d)
-	}
-	if f != "foo" {
-		t.Fatalf("unexpected f=%s", f)
-	}
-}
-
-func TestCleanedAbs_4(t *testing.T) {
-	fSys, testDir := makeTestDir(t)
-	defer os.RemoveAll(testDir)
-
-	err := fSys.MkdirAll(filepath.Join(testDir, "d1", "d2"))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	err = fSys.WriteFile(
-		filepath.Join(testDir, "d1", "d2", "bar"),
-		[]byte(`bar`))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-
-	d, f, err := fSys.CleanedAbs(
-		filepath.Join(testDir, "d1", "d2"))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	if d.String() != filepath.Join(testDir, "d1", "d2") {
-		t.Fatalf("unexpected d=%s", d)
-	}
-	if f != "" {
-		t.Fatalf("unexpected f=%s", f)
-	}
-
-	d, f, err = fSys.CleanedAbs(
-		filepath.Join(testDir, "d1", "d2", "bar"))
-	if err != nil {
-		t.Fatalf("unexpected err=%v", err)
-	}
-	if d.String() != filepath.Join(testDir, "d1", "d2") {
-		t.Fatalf("unexpected d=%s", d)
-	}
-	if f != "bar" {
-		t.Fatalf("unexpected f=%s", f)
-	}
-}
-
-func TestReadFilesRealFS(t *testing.T) {
-	fSys, testDir := makeTestDir(t)
-	defer os.RemoveAll(testDir)
-
-	err := fSys.WriteFile(path.Join(testDir, "foo"), []byte(`foo`))
-	if err != nil {
-		t.Fatalf("unexpected error %s", err)
-	}
-	if !fSys.Exists(path.Join(testDir, "foo")) {
-		t.Fatalf("expected foo")
-	}
-	if fSys.IsDir(path.Join(testDir, "foo")) {
-		t.Fatalf("expected foo not to be a directory")
-	}
-
-	err = fSys.WriteFile(path.Join(testDir, "bar"), []byte(`bar`))
-	if err != nil {
-		t.Fatalf("unexpected error %s", err)
-	}
-
-	files, err := fSys.Glob(path.Join("testDir", "*"))
-	expected := []string{
-		path.Join(testDir, "bar"),
-		path.Join(testDir, "foo"),
-	}
-	if err != nil {
-		t.Fatalf("expected no error")
-	}
-	if reflect.DeepEqual(files, expected) {
-		t.Fatalf("incorrect files found by glob: %v", files)
-	}
-}
--- a/api/filesys/util.go
+++ b/api/filesys/util.go
@@ -1,125 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-// RootedPath returns a rooted path, e.g. "/foo/bar" as
-// opposed to "foo/bar".
-func RootedPath(elem ...string) string {
-	return Separator + filepath.Join(elem...)
-}
-
-// StripTrailingSeps trims trailing filepath separators from input.
-func StripTrailingSeps(s string) string {
-	k := len(s)
-	for k > 0 && s[k-1] == filepath.Separator {
-		k--
-	}
-	return s[:k]
-}
-
-// StripLeadingSeps trims leading filepath separators from input.
-func StripLeadingSeps(s string) string {
-	k := 0
-	for k < len(s) && s[k] == filepath.Separator {
-		k++
-	}
-	return s[k:]
-}
-
-// PathSplit converts a file path to a slice of string.
-// If the path is absolute (if the path has a leading slash),
-// then the first entry in the result is an empty string.
-// Desired:  path == PathJoin(PathSplit(path))
-func PathSplit(incoming string) []string {
-	if incoming == "" {
-		return []string{}
-	}
-	dir, path := filepath.Split(incoming)
-	if dir == string(os.PathSeparator) {
-		if path == "" {
-			return []string{""}
-		}
-		return []string{"", path}
-	}
-	dir = strings.TrimSuffix(dir, string(os.PathSeparator))
-	if dir == "" {
-		return []string{path}
-	}
-	return append(PathSplit(dir), path)
-}
-
-// PathJoin converts a slice of string to a file path.
-// If the first entry is an empty string, then the returned
-// path is absolute (it has a leading slash).
-// Desired:  path == PathJoin(PathSplit(path))
-func PathJoin(incoming []string) string {
-	if len(incoming) == 0 {
-		return ""
-	}
-	if incoming[0] == "" {
-		return string(os.PathSeparator) + filepath.Join(incoming[1:]...)
-	}
-	return filepath.Join(incoming...)
-}
-
-// InsertPathPart inserts 'part' at position 'pos' in the given filepath.
-// The first position is 0.
-//
-// E.g. if part == 'PEACH'
-//
-//                  OLD : NEW                    : POS
-//      --------------------------------------------------------
-//              {empty} : PEACH                  : irrelevant
-//                    / : /PEACH                 : irrelevant
-//                  pie : PEACH/pie              : 0 (or negative)
-//                 /pie : /PEACH/pie             : 0 (or negative)
-//                  raw : raw/PEACH              : 1 (or larger)
-//                 /raw : /raw/PEACH             : 1 (or larger)
-//      a/nice/warm/pie : a/nice/warm/PEACH/pie  : 3
-//     /a/nice/warm/pie : /a/nice/warm/PEACH/pie : 3
-//
-// * An empty part results in no change.
-//
-// * Absolute paths get their leading '/' stripped, treated like
-//   relative paths, and the leading '/' is re-added on output.
-//   The meaning of pos is intentionally the same in either absolute or
-//   relative paths; if it weren't, this function could convert absolute
-//   paths to relative paths, which is not desirable.
-//
-// * For robustness (liberal input, conservative output) Pos values that
-//   that are too small (large) to index the split filepath result in a
-//   prefix (postfix) rather than an error.  Use extreme position values
-//   to assure a prefix or postfix (e.g. 0 will always prefix, and
-//   9999 will presumably always postfix).
-func InsertPathPart(path string, pos int, part string) string {
-	if part == "" {
-		return path
-	}
-	parts := PathSplit(path)
-	if pos < 0 {
-		pos = 0
-	} else if pos > len(parts) {
-		pos = len(parts)
-	}
-	if len(parts) > 0 && parts[0] == "" && pos < len(parts) {
-		// An empty string at 0 indicates an absolute path, and means
-		// we must increment pos.  This change means that a position
-		// specification has the same meaning in relative and absolute paths.
-		// E.g. in either the path 'a/b/c' or the path '/a/b/c',
-		// 'a' is at 0, 'b' is at 1 and 'c' is at 2, and inserting at
-		// zero means a new first field _without_ changing an absolute
-		// path to a relative path.
-		pos++
-	}
-	result := make([]string, len(parts)+1)
-	copy(result, parts[0:pos])
-	result[pos] = part
-	return PathJoin(append(result, parts[pos:]...))
-}
--- a/api/filesys/util_test.go
+++ b/api/filesys/util_test.go
@@ -1,374 +0,0 @@
-package filesys_test
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-
-	. "sigs.k8s.io/kustomize/api/filesys"
-)
-
-// Confirm behavior of filepath.Match
-func TestFilePathMatch(t *testing.T) {
-	cases := []struct {
-		pattern  string
-		path     string
-		expected bool
-	}{
-		{
-			pattern:  "*e*",
-			path:     "hey",
-			expected: true,
-		},
-		{
-			pattern:  "*e*",
-			path:     "hay",
-			expected: false,
-		},
-		{
-			pattern:  "*e*",
-			path:     filepath.Join("h", "e", "y"),
-			expected: false,
-		},
-		{
-			pattern:  "*/e/*",
-			path:     filepath.Join("h", "e", "y"),
-			expected: true,
-		},
-		{
-			pattern:  "h/e/*",
-			path:     filepath.Join("h", "e", "y"),
-			expected: true,
-		},
-		{
-			pattern:  "*/e/y",
-			path:     filepath.Join("h", "e", "y"),
-			expected: true,
-		},
-		{
-			pattern:  "*/*/*",
-			path:     filepath.Join("h", "e", "y"),
-			expected: true,
-		},
-		{
-			pattern:  "*/*/*",
-			path:     filepath.Join("h", "e", "y", "there"),
-			expected: false,
-		},
-		{
-			pattern:  "*/*/*/t*e",
-			path:     filepath.Join("h", "e", "y", "there"),
-			expected: true,
-		},
-	}
-	for _, item := range cases {
-		match, err := filepath.Match(item.pattern, item.path)
-		if err != nil {
-			t.Fatalf("unexpected err: %v", err)
-		}
-		if match != item.expected {
-			t.Fatalf("'%s' '%s' %v\n", item.pattern, item.path, match)
-		}
-	}
-}
-
-// Confirm behavior of filepath.Split
-func TestFilePathSplit(t *testing.T) {
-	cases := []struct {
-		full string
-		dir  string
-		file string
-	}{
-		{
-			full: "",
-			dir:  "",
-			file: "",
-		},
-		{
-			full: SelfDir,
-			dir:  "",
-			file: SelfDir,
-		},
-		{
-			full: "rabbit.jpg",
-			dir:  "",
-			file: "rabbit.jpg",
-		},
-		{
-			full: "/",
-			dir:  "/",
-			file: "",
-		},
-		{
-			full: "/beans",
-			dir:  "/",
-			file: "beans",
-		},
-		{
-			full: "/home/foo/bar",
-			dir:  "/home/foo/",
-			file: "bar",
-		},
-		{
-			full: "/usr/local/",
-			dir:  "/usr/local/",
-			file: "",
-		},
-		{
-			full: "/usr//local//go",
-			dir:  "/usr//local//",
-			file: "go",
-		},
-	}
-	for _, p := range cases {
-		dir, file := filepath.Split(p.full)
-		if dir != p.dir || file != p.file {
-			t.Fatalf(
-				"in '%s',\ngot dir='%s' (expected '%s'),\n got file='%s' (expected %s).",
-				p.full, dir, p.dir, file, p.file)
-		}
-	}
-}
-
-func TestPathSplitAndJoin(t *testing.T) {
-	cases := map[string]struct {
-		original string
-		expected []string
-	}{
-		"Empty": {
-			original: "",
-			expected: []string{},
-		},
-		"One": {
-			original: "hello",
-			expected: []string{"hello"},
-		},
-		"Two": {
-			original: "hello/there",
-			expected: []string{"hello", "there"},
-		},
-		"Three": {
-			original: "hello/my/friend",
-			expected: []string{"hello", "my", "friend"},
-		},
-	}
-	for n, c := range cases {
-		f := func(t *testing.T, original string, expected []string) {
-			actual := PathSplit(original)
-			if len(actual) != len(expected) {
-				t.Fatalf(
-					"expected len %d, got len %d",
-					len(expected), len(actual))
-			}
-			for i := range expected {
-				if expected[i] != actual[i] {
-					t.Fatalf(
-						"at i=%d, expected '%s', got '%s'",
-						i, expected[i], actual[i])
-				}
-			}
-			joined := PathJoin(actual)
-			if joined != original {
-				t.Fatalf(
-					"when rejoining, expected '%s', got '%s'",
-					original, joined)
-			}
-		}
-		t.Run("relative"+n, func(t *testing.T) {
-			f(t, c.original, c.expected)
-		})
-		t.Run("absolute"+n, func(t *testing.T) {
-			f(t,
-				string(os.PathSeparator)+c.original,
-				append([]string{""}, c.expected...))
-		})
-	}
-}
-
-func TestInsertPathPart(t *testing.T) {
-	cases := map[string]struct {
-		original string
-		pos      int
-		part     string
-		expected string
-	}{
-		"rootOne": {
-			original: "/",
-			pos:      0,
-			part:     "___",
-			expected: "/___",
-		},
-		"rootTwo": {
-			original: "/",
-			pos:      444,
-			part:     "___",
-			expected: "/___",
-		},
-		"rootedFirst": {
-			original: "/apple",
-			pos:      0,
-			part:     "___",
-			expected: "/___/apple",
-		},
-		"rootedSecond": {
-			original: "/apple",
-			pos:      444,
-			part:     "___",
-			expected: "/apple/___",
-		},
-		"rootedThird": {
-			original: "/apple/banana",
-			pos:      444,
-			part:     "___",
-			expected: "/apple/banana/___",
-		},
-		"emptyLow": {
-			original: "",
-			pos:      -3,
-			part:     "___",
-			expected: "___",
-		},
-		"emptyHigh": {
-			original: "",
-			pos:      444,
-			part:     "___",
-			expected: "___",
-		},
-		"peachPie": {
-			original: "a/nice/warm/pie",
-			pos:      3,
-			part:     "PEACH",
-			expected: "a/nice/warm/PEACH/pie",
-		},
-		"rootedPeachPie": {
-			original: "/a/nice/warm/pie",
-			pos:      3,
-			part:     "PEACH",
-			expected: "/a/nice/warm/PEACH/pie",
-		},
-		"longStart": {
-			original: "a/b/c/d/e/f",
-			pos:      0,
-			part:     "___",
-			expected: "___/a/b/c/d/e/f",
-		},
-		"rootedLongStart": {
-			original: "/a/b/c/d/e/f",
-			pos:      0,
-			part:     "___",
-			expected: "/___/a/b/c/d/e/f",
-		},
-		"longMiddle": {
-			original: "a/b/c/d/e/f",
-			pos:      3,
-			part:     "___",
-			expected: "a/b/c/___/d/e/f",
-		},
-		"rootedLongMiddle": {
-			original: "/a/b/c/d/e/f",
-			pos:      3,
-			part:     "___",
-			expected: "/a/b/c/___/d/e/f",
-		},
-		"longEnd": {
-			original: "a/b/c/d/e/f",
-			pos:      444,
-			part:     "___",
-			expected: "a/b/c/d/e/f/___",
-		},
-		"rootedLongEnd": {
-			original: "/a/b/c/d/e/f",
-			pos:      444,
-			part:     "___",
-			expected: "/a/b/c/d/e/f/___",
-		},
-	}
-	for n, c := range cases {
-		t.Run(n, func(t *testing.T) {
-			actual := InsertPathPart(c.original, c.pos, c.part)
-			if actual != c.expected {
-				t.Fatalf("expected '%s', got '%s'", c.expected, actual)
-			}
-		})
-	}
-}
-
-func TestStripTrailingSeps(t *testing.T) {
-	cases := []struct {
-		full string
-		rem  string
-	}{
-		{
-			full: "foo",
-			rem:  "foo",
-		},
-		{
-			full: "",
-			rem:  "",
-		},
-		{
-			full: "foo/",
-			rem:  "foo",
-		},
-		{
-			full: "foo///bar///",
-			rem:  "foo///bar",
-		},
-		{
-			full: "/////",
-			rem:  "",
-		},
-		{
-			full: "/",
-			rem:  "",
-		},
-	}
-	for _, p := range cases {
-		dir := StripTrailingSeps(p.full)
-		if dir != p.rem {
-			t.Fatalf(
-				"in '%s', got dir='%s' (expected '%s')",
-				p.full, dir, p.rem)
-		}
-	}
-}
-
-func TestStripLeadingSeps(t *testing.T) {
-	cases := []struct {
-		full string
-		rem  string
-	}{
-		{
-			full: "foo",
-			rem:  "foo",
-		},
-		{
-			full: "",
-			rem:  "",
-		},
-		{
-			full: "/foo",
-			rem:  "foo",
-		},
-		{
-			full: "///foo///bar///",
-			rem:  "foo///bar///",
-		},
-		{
-			full: "/////",
-			rem:  "",
-		},
-		{
-			full: "/",
-			rem:  "",
-		},
-	}
-	for _, p := range cases {
-		dir := StripLeadingSeps(p.full)
-		if dir != p.rem {
-			t.Fatalf(
-				"in '%s', got dir='%s' (expected '%s')",
-				p.full, dir, p.rem)
-		}
-	}
-}
--- a/api/filters/annotations/annotations.go
+++ b/api/filters/annotations/annotations.go
@@ -1,43 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package annotations
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/filtersutil"
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-type annoMap map[string]string
-
-type Filter struct {
-	// Annotations is the set of annotations to apply to the inputs
-	Annotations annoMap `yaml:"annotations,omitempty"`
-
-	// FsSlice contains the FieldSpecs to locate the namespace field
-	FsSlice types.FsSlice
-}
-
-var _ kio.Filter = Filter{}
-
-func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	keys := filtersutil.SortedMapKeys(f.Annotations)
-	_, err := kio.FilterAll(yaml.FilterFunc(
-		func(node *yaml.RNode) (*yaml.RNode, error) {
-			for _, k := range keys {
-				if err := node.PipeE(fsslice.Filter{
-					FsSlice:    f.FsSlice,
-					SetValue:   fsslice.SetEntry(k, f.Annotations[k], yaml.StringTag),
-					CreateKind: yaml.MappingNode, // Annotations are MappingNodes.
-					CreateTag:  "!!map",
-				}); err != nil {
-					return nil, err
-				}
-			}
-			return node, nil
-		})).Filter(nodes)
-	return nodes, err
-}
--- a/api/filters/annotations/annotations_test.go
+++ b/api/filters/annotations/annotations_test.go
@@ -1,226 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package annotations
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-var annosFs = builtinconfig.MakeDefaultConfig().CommonAnnotations
-
-func TestAnnotations_Filter(t *testing.T) {
-	testCases := map[string]struct {
-		input          string
-		expectedOutput string
-		filter         Filter
-		fsslice        types.FsSlice
-	}{
-		"add": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-    auto: ford
-    bean: cannellini
-    clown: emmett kelley
-    dragon: smaug
-`,
-			filter: Filter{Annotations: annoMap{
-				"clown":  "emmett kelley",
-				"auto":   "ford",
-				"dragon": "smaug",
-				"bean":   "cannellini",
-			}},
-		},
-		"update": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: superman
-    fiend: luthor
-    bean: cannellini
-    clown: emmett kelley
-`,
-			filter: Filter{Annotations: annoMap{
-				"clown": "emmett kelley",
-				"hero":  "superman",
-				"fiend": "luthor",
-				"bean":  "cannellini",
-			}},
-		},
-		"data-fieldspecs": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    sleater: kinney
-a:
-  b:
-    sleater: kinney
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  annotations:
-    sleater: kinney
-a:
-  b:
-    sleater: kinney
-`,
-			filter: Filter{Annotations: annoMap{
-				"sleater": "kinney",
-			}},
-			fsslice: []types.FieldSpec{
-				{
-					Path:               "a/b",
-					CreateIfNotPresent: true,
-				},
-			},
-		},
-
-		"number": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-    2: ford
-    clown: "1"
-`,
-			filter: Filter{Annotations: annoMap{
-				"clown": "1",
-				"2":     "ford",
-			}},
-		},
-
-		// test quoting of values which are not considered strings in yaml 1.1
-		"yaml_1_1_compatibility": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    hero: batman
-    fiend: riddler
-    a: "y"
-    b: y1
-    c: "yes"
-    d: yes1
-    e: "true"
-    f: true1
-`,
-			filter: Filter{Annotations: annoMap{
-				"a": "y",
-				"b": "y1",
-				"c": "yes",
-				"d": "yes1",
-				"e": "true",
-				"f": "true1",
-			}},
-		},
-
-		// test quoting of values which are not considered strings in yaml 1.1
-		"null_annotations": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations: null
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  annotations:
-    a: a1
-    b: b1
-`,
-			filter: Filter{Annotations: annoMap{
-				"a": "a1",
-				"b": "b1",
-			}},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			filter := tc.filter
-			filter.FsSlice = append(annosFs, tc.fsslice...)
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(filtertest_test.RunFilter(t, tc.input, filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/annotations/doc.go
+++ b/api/filters/annotations/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package annotations contains a kio.Filter implementation of the kustomize
-// annotations transformer.
-package annotations
--- a/api/filters/annotations/example_test.go
+++ b/api/filters/annotations/example_test.go
@@ -1,55 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package annotations
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	fss := builtinconfig.MakeDefaultConfig().CommonAnnotations
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`)}},
-		Filters: []kio.Filter{Filter{
-			Annotations: map[string]string{
-				"foo": "bar",
-			},
-			FsSlice: fss,
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	//   annotations:
-	//     foo: bar
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	//   annotations:
-	//     foo: bar
-}
--- a/api/filters/filtersutil/filtersutil.go
+++ b/api/filters/filtersutil/filtersutil.go
@@ -1,21 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filtersutil
-
-import (
-	"sort"
-)
-
-// SortedMapKeys returns a sorted slice of keys to the given map.
-// Writing this function never gets old.
-func SortedMapKeys(m map[string]string) []string {
-	keys := make([]string, len(m))
-	i := 0
-	for k := range m {
-		keys[i] = k
-		i++
-	}
-	sort.Strings(keys)
-	return keys
-}
--- a/api/filters/filtersutil/filtersutil_test.go
+++ b/api/filters/filtersutil/filtersutil_test.go
@@ -1,34 +0,0 @@
-package filtersutil_test
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/filters/filtersutil"
-)
-
-func TestSortedKeys(t *testing.T) {
-	testCases := map[string]struct {
-		input    map[string]string
-		expected []string
-	}{
-		"empty": {
-			input:    map[string]string{},
-			expected: []string{}},
-		"one": {
-			input:    map[string]string{"a": "aaa"},
-			expected: []string{"a"}},
-		"three": {
-			input:    map[string]string{"c": "ccc", "b": "bbb", "a": "aaa"},
-			expected: []string{"a", "b", "c"}},
-	}
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			if !assert.Equal(t,
-				filtersutil.SortedMapKeys(tc.input),
-				tc.expected) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/fsslice/doc.go
+++ b/api/filters/fsslice/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package fsslice contains a yaml.Filter to modify a resource using an
-// FsSlice to identify fields to be updated within the resource.
-package fsslice
--- a/api/filters/fsslice/example_test.go
+++ b/api/filters/fsslice/example_test.go
@@ -1,62 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package fsslice_test
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-func ExampleFilter() {
-	in := &kio.ByteReader{
-		Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`),
-	}
-	fltr := fsslice.Filter{
-		CreateKind: yaml.ScalarNode,
-		SetValue:   fsslice.SetScalar("green"),
-		FsSlice: []types.FieldSpec{
-			{Path: "a/b", CreateIfNotPresent: true},
-		},
-	}
-
-	err := kio.Pipeline{
-		Inputs:  []kio.Reader{in},
-		Filters: []kio.Filter{kio.FilterAll(fltr)},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	// a:
-	//   b: green
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	// a:
-	//   b: green
-}
--- a/api/filters/fsslice/fieldspec_filter.go
+++ b/api/filters/fsslice/fieldspec_filter.go
@@ -1,155 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package fsslice
-
-import (
-	"strings"
-
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/errors"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// fieldSpecFilter applies a single fieldSpec to a single object
-// fieldSpecFilter stores internal state and should not be reused
-type fieldSpecFilter struct {
-	// FieldSpec contains the path to the value to set.
-	FieldSpec types.FieldSpec `yaml:"fieldSpec"`
-
-	// Set the field using this function
-	SetValue SetFn
-
-	// CreateKind defines the type of node to create if the field is not found
-	CreateKind yaml.Kind
-
-	CreateTag string
-
-	// path keeps internal state about the current path
-	path []string
-}
-
-func (fltr fieldSpecFilter) Filter(obj *yaml.RNode) (*yaml.RNode, error) {
-	// check if the FieldSpec applies to the object
-	if match, err := isMatchGVK(fltr.FieldSpec, obj); !match || err != nil {
-		return obj, errors.Wrap(err)
-	}
-	fltr.path = strings.Split(fltr.FieldSpec.Path, "/")
-	if err := fltr.filter(obj); err != nil {
-		s, _ := obj.String()
-		return nil, errors.WrapPrefixf(err,
-			"obj %v at path %v", s, fltr.FieldSpec.Path)
-	}
-	return obj, nil
-}
-
-func (fltr fieldSpecFilter) filter(obj *yaml.RNode) error {
-	if len(fltr.path) == 0 {
-		// found the field -- set its value
-		return fltr.SetValue(obj)
-	}
-	switch obj.YNode().Kind {
-	case yaml.SequenceNode:
-		return fltr.seq(obj)
-	case yaml.MappingNode:
-		return fltr.field(obj)
-	}
-	// not found -- this might be an error since the type doesn't match
-
-	return errors.Errorf("unsupported yaml node")
-}
-
-// field calls filter on the field matching the next path element
-func (fltr fieldSpecFilter) field(obj *yaml.RNode) error {
-	fieldName, isSeq := isSequenceField(fltr.path[0])
-
-	// lookup the field matching the next path element
-	var lookupField yaml.Filter
-	var kind yaml.Kind
-	var tag string
-	switch {
-	case !fltr.FieldSpec.CreateIfNotPresent || fltr.CreateKind == 0 || isSeq:
-		// dont' create the field if we don't find it
-		lookupField = yaml.Lookup(fieldName)
-	case len(fltr.path) <= 1:
-		// create the field if it is missing: use the provided node kind
-		lookupField = yaml.LookupCreate(fltr.CreateKind, fieldName)
-		kind = fltr.CreateKind
-		tag = fltr.CreateTag
-	default:
-		// create the field if it is missing: must be a mapping node
-		lookupField = yaml.LookupCreate(yaml.MappingNode, fieldName)
-		kind = yaml.MappingNode
-		tag = "!!map"
-	}
-
-	// locate (or maybe create) the field
-	field, err := obj.Pipe(lookupField)
-	if err != nil || field == nil {
-		return errors.WrapPrefixf(err, "fieldName: %s", fieldName)
-	}
-
-	// if the value exists, but is null, then change it to the creation type
-	// TODO: update yaml.LookupCreate to support this
-	if field.YNode().Tag == "!!null" {
-		field.YNode().Kind = kind
-		field.YNode().Tag = tag
-	}
-
-	// copy the current fltr and change the path on the copy
-	var next = fltr
-	// call filter for the next path element on the matching field
-	next.path = fltr.path[1:]
-	return next.filter(field)
-}
-
-// seq calls filter on all sequence elements
-func (fltr fieldSpecFilter) seq(obj *yaml.RNode) error {
-	if err := obj.VisitElements(func(node *yaml.RNode) error {
-		// recurse on each element -- re-allocating a fieldSpecFilter is
-		// not strictly required, but is more consistent with field
-		// and less likely to have side effects
-		// keep the entire path -- it does not contain parts for sequences
-		return fltr.filter(node)
-	}); err != nil {
-		return errors.WrapPrefixf(err,
-			"visit traversal on path: %v", fltr.path)
-	}
-
-	return nil
-}
-
-// isSequenceField returns true if the path element is for a sequence field.
-// isSequence also returns the path element with the '[]' suffix trimmed
-func isSequenceField(name string) (string, bool) {
-	isSeq := strings.HasSuffix(name, "[]")
-	name = strings.TrimSuffix(name, "[]")
-	return name, isSeq
-}
-
-// isMatchGVK returns true if the fs.GVK matches the obj GVK.
-func isMatchGVK(fs types.FieldSpec, obj *yaml.RNode) (bool, error) {
-	meta, err := obj.GetMeta()
-	if err != nil {
-		return false, err
-	}
-	if fs.Kind != "" && fs.Kind != meta.Kind {
-		// kind doesn't match
-		return false, err
-	}
-
-	// parse the group and version from the apiVersion field
-	group, version := parseGV(meta.APIVersion)
-
-	if fs.Group != "" && fs.Group != group {
-		// group doesn't match
-		return false, nil
-	}
-
-	if fs.Version != "" && fs.Version != version {
-		// version doesn't match
-		return false, nil
-	}
-
-	return true, nil
-}
--- a/api/filters/fsslice/fsslice.go
+++ b/api/filters/fsslice/fsslice.go
@@ -1,73 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package fsslice
-
-import (
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// SetFn sets a value
-type SetFn func(*yaml.RNode) error
-
-// SetScalar returns a SetFn to set a scalar value
-func SetScalar(value string) SetFn {
-	return func(node *yaml.RNode) error {
-		return node.PipeE(yaml.FieldSetter{StringValue: value})
-	}
-}
-
-// SetEntry returns a SetFn to set an entry in a map
-func SetEntry(key, value, tag string) SetFn {
-	n := &yaml.Node{
-		Kind:  yaml.ScalarNode,
-		Value: value,
-		Tag:   tag,
-	}
-	if tag == yaml.StringTag && yaml.IsYaml1_1NonString(n) {
-		n.Style = yaml.DoubleQuotedStyle
-	}
-	return func(node *yaml.RNode) error {
-		return node.PipeE(yaml.FieldSetter{
-			Name:  key,
-			Value: yaml.NewRNode(n),
-		})
-	}
-
-}
-
-var _ yaml.Filter = Filter{}
-
-// Filter uses an FsSlice to modify fields on a single object
-type Filter struct {
-	// FieldSpecList list of FieldSpecs to set
-	FsSlice types.FsSlice `yaml:"fsSlice"`
-
-	// SetValue is called on each field that matches one of the FieldSpecs
-	SetValue SetFn
-
-	// CreateKind is used to create fields that do not exist
-	CreateKind yaml.Kind
-
-	// CreateTag is used to set the tag if encountering a null field
-	CreateTag string
-}
-
-func (fltr Filter) Filter(obj *yaml.RNode) (*yaml.RNode, error) {
-	for i := range fltr.FsSlice {
-		// apply this FieldSpec
-		// create a new filter for each iteration because they
-		// store internal state about the field paths
-		_, err := (&fieldSpecFilter{
-			FieldSpec:  fltr.FsSlice[i],
-			SetValue:   fltr.SetValue,
-			CreateKind: fltr.CreateKind,
-			CreateTag:  fltr.CreateTag,
-		}).Filter(obj)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return obj, nil
-}
--- a/api/filters/fsslice/fsslice_test.go
+++ b/api/filters/fsslice/fsslice_test.go
@@ -1,379 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package fsslice_test
-
-import (
-	"bytes"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-type TestCase struct {
-	name     string
-	input    string
-	expected string
-	filter   fsslice.Filter
-	fsSlice  string
-	error    string
-}
-
-var tests = []TestCase{
-	{
-		name: "update",
-		fsSlice: `
- path: a/b
-  group: foo
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b: c
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b: e
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "update-kind-not-match",
-		fsSlice: `
- path: a/b
-  group: foo
-  kind: Bar1
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar2
-a:
-  b: c
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar2
-a:
-  b: c
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "update-group-not-match",
-		fsSlice: `
- path: a/b
-  group: foo1
-  kind: Bar
-`,
-		input: `
-apiVersion: foo2/v1beta1
-kind: Bar
-a:
-  b: c
-`,
-		expected: `
-apiVersion: foo2/v1beta1
-kind: Bar
-a:
-  b: c
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "update-version-not-match",
-		fsSlice: `
- path: a/b
-  group: foo
-  version: v1beta1
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta2
-kind: Bar
-a:
-  b: c
-`,
-		expected: `
-apiVersion: foo/v1beta2
-kind: Bar
-a:
-  b: c
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "bad-version",
-		fsSlice: `
- path: a/b
-  group: foo
-  version: v1beta1
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta2/something
-kind: Bar
-a:
-  b: c
-`,
-		expected: `
-apiVersion: foo/v1beta2/something
-kind: Bar
-a:
-  b: c
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "bad-meta",
-		fsSlice: `
- path: a/b
-  group: foo
-  version: v1beta1
-  kind: Bar
-`,
-		input: `
-a:
-  b: c
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-		error: "missing Resource metadata",
-	},
-
-	{
-		name: "miss-match-type",
-		fsSlice: `
- path: a/b/c
-  kind: Bar
-`,
-		input: `
-kind: Bar
-a:
-  b: a
-`,
-		error: "obj kind: Bar\na:\n  b: a\n at path a/b/c: unsupported yaml node",
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	{
-		name: "add",
-		fsSlice: `
- path: a/b/c/d
-  group: foo
-  create: true
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar
-a: {}
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar
-a: {b: {c: {d: e}}}
-`,
-		filter: fsslice.Filter{
-			SetValue:   fsslice.SetScalar("e"),
-			CreateKind: yaml.ScalarNode,
-		},
-	},
-
-	{
-		name: "update-in-sequence",
-		fsSlice: `
- path: a/b[]/c/d
-  group: foo
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b:
-  - c:
-      d: a
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b:
-  - c:
-      d: e
-`,
-		filter: fsslice.Filter{
-			SetValue: fsslice.SetScalar("e"),
-		},
-	},
-
-	// Don't create a sequence
-	{
-		name: "empty-sequence-no-create",
-		fsSlice: `
- path: a/b[]/c/d
-  group: foo
-  create: true
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar
-a: {}
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar
-a: {}
-`,
-		filter: fsslice.Filter{
-			SetValue:   fsslice.SetScalar("e"),
-			CreateKind: yaml.ScalarNode,
-		},
-	},
-
-	// Create a new field for an element in a sequence
-	{
-		name: "empty-sequence-create",
-		fsSlice: `
- path: a/b[]/c/d
-  group: foo
-  create: true
-  kind: Bar
-`,
-		input: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b:
-  - c: {}
-`,
-		expected: `
-apiVersion: foo/v1beta1
-kind: Bar
-a:
-  b:
-  - c: {d: e}
-`,
-		filter: fsslice.Filter{
-			SetValue:   fsslice.SetScalar("e"),
-			CreateKind: yaml.ScalarNode,
-		},
-	},
-
-	{
-		name: "group v1",
-		fsSlice: `
- path: a/b
-  group: v1
-  create: true
-  kind: Bar
-`,
-		input: `
-apiVersion: v1
-kind: Bar
-`,
-		expected: `
-apiVersion: v1
-kind: Bar
-`,
-		filter: fsslice.Filter{
-			SetValue:   fsslice.SetScalar("e"),
-			CreateKind: yaml.ScalarNode,
-		},
-	},
-
-	{
-		name: "version v1",
-		fsSlice: `
- path: a/b
-  version: v1
-  create: true
-  kind: Bar
-`,
-		input: `
-apiVersion: v1
-kind: Bar
-`,
-		expected: `
-apiVersion: v1
-kind: Bar
-a:
-  b: e
-`,
-		filter: fsslice.Filter{
-			SetValue:   fsslice.SetScalar("e"),
-			CreateKind: yaml.ScalarNode,
-		},
-	},
-}
-
-func TestFilter_Filter(t *testing.T) {
-	for i := range tests {
-		test := tests[i]
-		t.Run(test.name, func(t *testing.T) {
-			err := yaml.Unmarshal([]byte(test.fsSlice), &test.filter.FsSlice)
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-
-			out := &bytes.Buffer{}
-			rw := &kio.ByteReadWriter{
-				Reader:                bytes.NewBufferString(test.input),
-				Writer:                out,
-				OmitReaderAnnotations: true,
-			}
-
-			// run the filter
-			err = kio.Pipeline{
-				Inputs:  []kio.Reader{rw},
-				Filters: []kio.Filter{kio.FilterAll(test.filter)},
-				Outputs: []kio.Writer{rw},
-			}.Execute()
-			if test.error != "" {
-				if !assert.EqualError(t, err, test.error) {
-					t.FailNow()
-				}
-				// stop rest of test
-				return
-			}
-
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-
-			// check results
-			if !assert.Equal(t,
-				strings.TrimSpace(test.expected),
-				strings.TrimSpace(out.String())) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/fsslice/gvk.go
+++ b/api/filters/fsslice/gvk.go
@@ -1,49 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-package fsslice
-
-import (
-	"strings"
-
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// Return true for 'v' followed by a 1 or 2, and don't look at rest.
-// I.e. 'v1', 'v1beta1', 'v2', would return true.
-func looksLikeACoreApiVersion(s string) bool {
-	if len(s) < 2 {
-		return false
-	}
-	if s[0:1] != "v" {
-		return false
-	}
-	return s[1:2] == "1" || s[1:2] == "2"
-}
-
-// parseGV parses apiVersion field into group and version.
-func parseGV(apiVersion string) (group, version string) {
-	// parse the group and version from the apiVersion field
-	parts := strings.SplitN(apiVersion, "/", 2)
-	group = parts[0]
-	if len(parts) > 1 {
-		version = parts[1]
-	}
-	// Special case the original "apiVersion" of what
-	// we now call the "core" (empty) group.
-	if version == "" && looksLikeACoreApiVersion(group) {
-		version = group
-		group = ""
-	}
-	return
-}
-
-// GetGVK parses the metadata into a GVK
-func GetGVK(meta yaml.ResourceMeta) resid.Gvk {
-	group, version := parseGV(meta.APIVersion)
-	return resid.Gvk{
-		Group:   group,
-		Version: version,
-		Kind:    meta.Kind,
-	}
-}
--- a/api/filters/fsslice/gvk_test.go
+++ b/api/filters/fsslice/gvk_test.go
@@ -1,156 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-package fsslice
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-func TestParseGV(t *testing.T) {
-	testCases := map[string]struct {
-		input           string
-		expectedGroup   string
-		expectedVersion string
-	}{
-		"empty": {
-			input:           "",
-			expectedGroup:   "",
-			expectedVersion: "",
-		},
-		"certSigning": {
-			input:           "certificates.k8s.io/v1beta1",
-			expectedGroup:   "certificates.k8s.io",
-			expectedVersion: "v1beta1",
-		},
-		"extensions": {
-			input:           "extensions/v1beta1",
-			expectedGroup:   "extensions",
-			expectedVersion: "v1beta1",
-		},
-		"normal": {
-			input:           "apps/v1",
-			expectedGroup:   "apps",
-			expectedVersion: "v1",
-		},
-		"justApps": {
-			input:           "apps",
-			expectedGroup:   "apps",
-			expectedVersion: "",
-		},
-		"coreV1": {
-			input:           "v1",
-			expectedGroup:   "",
-			expectedVersion: "v1",
-		},
-		"coreV2": {
-			input:           "v2",
-			expectedGroup:   "",
-			expectedVersion: "v2",
-		},
-		"coreV2Beta1": {
-			input:           "v2beta1",
-			expectedGroup:   "",
-			expectedVersion: "v2beta1",
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			group, version := parseGV(tc.input)
-			if !assert.Equal(t, tc.expectedGroup, group) {
-				t.FailNow()
-			}
-			if !assert.Equal(t, tc.expectedVersion, version) {
-				t.FailNow()
-			}
-		})
-	}
-}
-
-func TestGetGVK(t *testing.T) {
-	testCases := map[string]struct {
-		input      string
-		expected   resid.Gvk
-		parseError string
-		metaError  string
-	}{
-		"empty": {
-			input: `
-`,
-			parseError: "EOF",
-		},
-		"junk": {
-			input: `
-congress: effective
-`,
-			metaError: "missing Resource metadata",
-		},
-		"normal": {
-			input: `
-apiVersion: apps/v1
-kind: Deployment
-`,
-			expected: resid.Gvk{Group: "apps", Version: "v1", Kind: "Deployment"},
-		},
-		"apiVersionOnlyWithSlash": {
-			input: `
-apiVersion: apps/v1
-`,
-			expected: resid.Gvk{Group: "apps", Version: "v1", Kind: ""},
-		},
-		"apiVersionOnlyNoSlash1": {
-			input: `
-apiVersion: apps
-`,
-			expected: resid.Gvk{Group: "apps", Version: "", Kind: ""},
-		},
-		"apiVersionOnlyNoSlash2": {
-			input: `
-apiVersion: v1
-`,
-			expected: resid.Gvk{Group: "", Version: "v1", Kind: ""},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			obj, err := yaml.Parse(tc.input)
-			if len(tc.parseError) != 0 {
-				if err == nil {
-					t.Error("expected parse error")
-					return
-				}
-				if !strings.Contains(err.Error(), tc.parseError) {
-					t.Errorf("expected parse err '%s', got '%v'", tc.parseError, err)
-				}
-				return
-			}
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-			meta, err := obj.GetMeta()
-			if len(tc.metaError) != 0 {
-				if err == nil {
-					t.Error("expected meta error")
-					return
-				}
-				if !strings.Contains(err.Error(), tc.metaError) {
-					t.Errorf("expected meta err '%s', got '%v'", tc.metaError, err)
-				}
-				return
-			}
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-			gvk := GetGVK(meta)
-			if !assert.Equal(t, tc.expected, gvk) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/imagetag/doc.go
+++ b/api/filters/imagetag/doc.go
@@ -1,12 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package imagetag contains two kio.Filter implementations to cover the
-// functionality of the kustomize imagetag transformer.
-//
-// Filter updates fields based on a FieldSpec and an ImageTag.
-//
-// LegacyFilter doesn't use a FieldSpec, and instead only updates image
-// references if the field is name image and it is underneath a field called
-// either containers or initContainers.
-package imagetag
--- a/api/filters/imagetag/example_test.go
+++ b/api/filters/imagetag/example_test.go
@@ -1,126 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - name: FooBar
-    image: nginx
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-spec:
-  containers:
-  - name: BarFoo
-    image: nginx:1.2.1
-`)}},
-		Filters: []kio.Filter{Filter{
-			ImageTag: types.Image{
-				Name:    "nginx",
-				NewName: "apache",
-				Digest:  "12345",
-			},
-			FsSlice: []types.FieldSpec{
-				{
-					Path: "spec/containers[]/image",
-				},
-			},
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	// spec:
-	//   containers:
-	//   - name: FooBar
-	//     image: apache@12345
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	// spec:
-	//   containers:
-	//   - name: BarFoo
-	//     image: apache@12345
-}
-
-func ExampleLegacyFilter() {
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - name: FooBar
-    image: nginx
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-spec:
-  containers:
-  - name: BarFoo
-    image: nginx:1.2.1
-`)}},
-		Filters: []kio.Filter{LegacyFilter{
-			ImageTag: types.Image{
-				Name:    "nginx",
-				NewName: "apache",
-				Digest:  "12345",
-			},
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	// spec:
-	//   containers:
-	//   - name: FooBar
-	//     image: apache@12345
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	// spec:
-	//   containers:
-	//   - name: BarFoo
-	//     image: apache@12345
-}
--- a/api/filters/imagetag/imagetag.go
+++ b/api/filters/imagetag/imagetag.go
@@ -1,44 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-type Filter struct {
-	// imageTag is the tag we want to apply to the inputs
-	ImageTag types.Image `json:"imageTag,omitempty" yaml:"imageTag,omitempty"`
-
-	// FsSlice contains the FieldSpecs to locate the namespace field
-	FsSlice types.FsSlice `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-var _ kio.Filter = Filter{}
-
-func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	_, err := kio.FilterAll(yaml.FilterFunc(f.filter)).Filter(nodes)
-	return nodes, err
-}
-
-func (f Filter) filter(node *yaml.RNode) (*yaml.RNode, error) {
-	if err := node.PipeE(fsslice.Filter{
-		FsSlice:  f.FsSlice,
-		SetValue: updateImageTagFn(f.ImageTag),
-	}); err != nil {
-		return nil, err
-	}
-	return node, nil
-}
-
-func updateImageTagFn(imageTag types.Image) fsslice.SetFn {
-	return func(node *yaml.RNode) error {
-		return node.PipeE(imageTagUpdater{
-			ImageTag: imageTag,
-		})
-	}
-}
--- a/api/filters/imagetag/imagetag_test.go
+++ b/api/filters/imagetag/imagetag_test.go
@@ -1,101 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	filtertest "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func TestImageTagUpdater_Filter(t *testing.T) {
-	testCases := map[string]struct {
-		input          string
-		expectedOutput string
-		filter         Filter
-		fsSlice        types.FsSlice
-	}{
-		"update with digest": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  image: nginx:1.2.1
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  image: apache@12345
-`,
-			filter: Filter{
-				ImageTag: types.Image{
-					Name:    "nginx",
-					NewName: "apache",
-					Digest:  "12345",
-				},
-			},
-			fsSlice: []types.FieldSpec{
-				{
-					Path: "spec/image",
-				},
-			},
-		},
-		"multiple matches in sequence": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: nginx:1.2.1
-  - image: not_nginx@54321
-  - image: nginx:1.2.1
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: apache:3.2.1
-  - image: not_nginx@54321
-  - image: apache:3.2.1
-`,
-			filter: Filter{
-				ImageTag: types.Image{
-					Name:    "nginx",
-					NewName: "apache",
-					NewTag:  "3.2.1",
-				},
-			},
-			fsSlice: []types.FieldSpec{
-				{
-					Path: "spec/containers/image",
-				},
-			},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			filter := tc.filter
-			filter.FsSlice = tc.fsSlice
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(filtertest.RunFilter(t, tc.input, filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/imagetag/legacy.go
+++ b/api/filters/imagetag/legacy.go
@@ -1,113 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// LegacyFilter is an implementation of the kio.Filter interface
-// that scans through the provided kyaml data structure and updates
-// any values of any image fields that is inside a sequence under
-// a field called either containers or initContainers. The field is only
-// update if it has a value that matches and image reference and the name
-// of the image is a match with the provided ImageTag.
-type LegacyFilter struct {
-	ImageTag types.Image `json:"imageTag,omitempty" yaml:"imageTag,omitempty"`
-}
-
-var _ kio.Filter = LegacyFilter{}
-
-func (lf LegacyFilter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	return kio.FilterAll(yaml.FilterFunc(lf.filter)).Filter(nodes)
-}
-
-func (lf LegacyFilter) filter(node *yaml.RNode) (*yaml.RNode, error) {
-	meta, err := node.GetMeta()
-	if err != nil {
-		return nil, err
-	}
-
-	// We do not make any changes if the type of the resource
-	// is CustomResourceDefinition.
-	if meta.Kind == `CustomResourceDefinition` {
-		return node, nil
-	}
-
-	fff := findFieldsFilter{
-		fields:        []string{"containers", "initContainers"},
-		fieldCallback: checkImageTagsFn(lf.ImageTag),
-	}
-	if err := node.PipeE(fff); err != nil {
-		return nil, err
-	}
-	return node, nil
-}
-
-type fieldCallback func(node *yaml.RNode) error
-
-// findFieldsFilter is an implementation of the kio.Filter
-// interface. It will walk the data structure and look for fields
-// that matches the provided list of field names. For each match,
-// the value of the field will be passed in as a parameter to the
-// provided fieldCallback.
-// TODO: move this to kyaml/filterutils
-type findFieldsFilter struct {
-	fields []string
-
-	fieldCallback fieldCallback
-}
-
-func (f findFieldsFilter) Filter(obj *yaml.RNode) (*yaml.RNode, error) {
-	return obj, f.walk(obj)
-}
-
-func (f findFieldsFilter) walk(node *yaml.RNode) error {
-	switch node.YNode().Kind {
-	case yaml.MappingNode:
-		return node.VisitFields(func(n *yaml.MapNode) error {
-			err := f.walk(n.Value)
-			if err != nil {
-				return err
-			}
-			key := n.Key.YNode().Value
-			if contains(f.fields, key) {
-				return f.fieldCallback(n.Value)
-			}
-			return nil
-		})
-	case yaml.SequenceNode:
-		return node.VisitElements(func(n *yaml.RNode) error {
-			return f.walk(n)
-		})
-	}
-	return nil
-}
-
-func contains(slice []string, str string) bool {
-	for _, s := range slice {
-		if s == str {
-			return true
-		}
-	}
-	return false
-}
-
-func checkImageTagsFn(imageTag types.Image) fieldCallback {
-	return func(node *yaml.RNode) error {
-		if node.YNode().Kind != yaml.SequenceNode {
-			return nil
-		}
-
-		return node.VisitElements(func(n *yaml.RNode) error {
-			// Look up any fields on the provided node that is named
-			// image.
-			return n.PipeE(yaml.Get("image"), imageTagUpdater{
-				ImageTag: imageTag,
-			})
-		})
-	}
-}
--- a/api/filters/imagetag/legacy_test.go
+++ b/api/filters/imagetag/legacy_test.go
@@ -1,136 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	filtertest "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func TestLegacyImageTag_Filter(t *testing.T) {
-	testCases := map[string]struct {
-		input          string
-		expectedOutput string
-		filter         LegacyFilter
-	}{
-		"updates multiple images inside containers": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: nginx:1.2.1
-  - image: nginx:2.1.2
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: apache@12345
-  - image: apache@12345
-`,
-			filter: LegacyFilter{
-				ImageTag: types.Image{
-					Name:    "nginx",
-					NewName: "apache",
-					Digest:  "12345",
-				},
-			},
-		},
-		"updates inside both containers and initContainers": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: nginx:1.2.1
-  - image: tomcat:1.2.3
-  initContainers:
-  - image: nginx:1.2.1
-  - image: apache:1.2.3
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: apache:3.2.1
-  - image: tomcat:1.2.3
-  initContainers:
-  - image: apache:3.2.1
-  - image: apache:1.2.3
-`,
-			filter: LegacyFilter{
-				ImageTag: types.Image{
-					Name:    "nginx",
-					NewName: "apache",
-					NewTag:  "3.2.1",
-				},
-			},
-		},
-		"updates on multiple depths": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: nginx:1.2.1
-  - image: tomcat:1.2.3
-  template:
-    spec: 
-      initContainers:
-      - image: nginx:1.2.1
-      - image: apache:1.2.3
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  containers:
-  - image: apache:3.2.1
-  - image: tomcat:1.2.3
-  template:
-    spec:
-      initContainers:
-      - image: apache:3.2.1
-      - image: apache:1.2.3
-`,
-			filter: LegacyFilter{
-				ImageTag: types.Image{
-					Name:    "nginx",
-					NewName: "apache",
-					NewTag:  "3.2.1",
-				},
-			},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			filter := tc.filter
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(filtertest.RunFilter(t, tc.input, filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/imagetag/updater.go
+++ b/api/filters/imagetag/updater.go
@@ -1,43 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package imagetag
-
-import (
-	"sigs.k8s.io/kustomize/api/image"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// imageTagUpdater is an implementation of the kio.Filter interface
-// that will update the value of the yaml node based on the provided
-// ImageTag if the current value matches the format of an image reference.
-type imageTagUpdater struct {
-	Kind     string      `yaml:"kind,omitempty"`
-	ImageTag types.Image `yaml:"imageTag,omitempty"`
-}
-
-func (u imageTagUpdater) Filter(rn *yaml.RNode) (*yaml.RNode, error) {
-	if err := yaml.ErrorIfInvalid(rn, yaml.ScalarNode); err != nil {
-		return nil, err
-	}
-
-	value := rn.YNode().Value
-
-	if !image.IsImageMatched(value, u.ImageTag.Name) {
-		return rn, nil
-	}
-
-	name, tag := image.Split(value)
-	if u.ImageTag.NewName != "" {
-		name = u.ImageTag.NewName
-	}
-	if u.ImageTag.NewTag != "" {
-		tag = ":" + u.ImageTag.NewTag
-	}
-	if u.ImageTag.Digest != "" {
-		tag = "@" + u.ImageTag.Digest
-	}
-
-	return rn.Pipe(yaml.FieldSetter{StringValue: name + tag})
-}
--- a/api/filters/labels/doc.go
+++ b/api/filters/labels/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package labels contains a kio.Filter implementation of the kustomize
-// labels transformer.
-package labels
--- a/api/filters/labels/example_test.go
+++ b/api/filters/labels/example_test.go
@@ -1,55 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package labels
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	fss := builtinconfig.MakeDefaultConfig().CommonLabels
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`)}},
-		Filters: []kio.Filter{Filter{
-			Labels: map[string]string{
-				"foo": "bar",
-			},
-			FsSlice: fss,
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	//   labels:
-	//     foo: bar
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	//   labels:
-	//     foo: bar
-}
--- a/api/filters/labels/labels.go
+++ b/api/filters/labels/labels.go
@@ -1,44 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package labels
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/filtersutil"
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-type labelMap map[string]string
-
-// Filter sets labels.
-type Filter struct {
-	// Labels is the set of labels to apply to the inputs
-	Labels labelMap `yaml:"labels,omitempty"`
-
-	// FsSlice identifies the label fields.
-	FsSlice types.FsSlice
-}
-
-var _ kio.Filter = Filter{}
-
-func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	keys := filtersutil.SortedMapKeys(f.Labels)
-	_, err := kio.FilterAll(yaml.FilterFunc(
-		func(node *yaml.RNode) (*yaml.RNode, error) {
-			for _, k := range keys {
-				if err := node.PipeE(fsslice.Filter{
-					FsSlice:    f.FsSlice,
-					SetValue:   fsslice.SetEntry(k, f.Labels[k], yaml.StringTag),
-					CreateKind: yaml.MappingNode, // Labels are MappingNodes.
-					CreateTag:  "!!map",
-				}); err != nil {
-					return nil, err
-				}
-			}
-			return node, nil
-		})).Filter(nodes)
-	return nodes, err
-}
--- a/api/filters/labels/labels_test.go
+++ b/api/filters/labels/labels_test.go
@@ -1,413 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package labels
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/resid"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func TestLabels_Filter(t *testing.T) {
-	testCases := map[string]struct {
-		input          string
-		expectedOutput string
-		filter         Filter
-	}{
-		"add": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-    auto: ford
-    bean: cannellini
-    clown: emmett kelley
-    dragon: smaug
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"clown":  "emmett kelley",
-					"auto":   "ford",
-					"dragon": "smaug",
-					"bean":   "cannellini",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-		"update": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: superman
-    fiend: luthor
-    bean: cannellini
-    clown: emmett kelley
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"clown": "emmett kelley",
-					"hero":  "superman",
-					"fiend": "luthor",
-					"bean":  "cannellini",
-				}, FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		"data-fieldspecs": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    sleater: kinney
-a:
-  b:
-    sleater: kinney
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  labels:
-    sleater: kinney
-a:
-  b:
-    sleater: kinney
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"sleater": "kinney",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-					{
-						Path:               "a/b",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		"fieldSpecWithKind": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v2
-kind: Bar
-metadata:
-  name: instance
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
---
-apiVersion: example.com/v2
-kind: Bar
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
-a:
-  b:
-    cheese: cheddar
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"cheese": "cheddar",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-					{
-						Gvk: resid.Gvk{
-							Kind: "Bar",
-						},
-						Path:               "a/b",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		"fieldSpecWithVersion": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v2
-kind: Bar
-metadata:
-  name: instance
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
-a:
-  b:
-    cheese: cheddar
---
-apiVersion: example.com/v2
-kind: Bar
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"cheese": "cheddar",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-					{
-						Gvk: resid.Gvk{
-							Version: "v1",
-						},
-						Path:               "a/b",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-		"fieldSpecWithVersionInConfigButNoGroupInData": {
-			input: `
-apiVersion: v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: v2
-kind: Bar
-metadata:
-  name: instance
-`,
-			expectedOutput: `
-apiVersion: v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
-a:
-  b:
-    cheese: cheddar
---
-apiVersion: v2
-kind: Bar
-metadata:
-  name: instance
-  labels:
-    cheese: cheddar
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"cheese": "cheddar",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-					{
-						Gvk: resid.Gvk{
-							Version: "v1",
-						},
-						Path:               "a/b",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		"number": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-    1: emmett kelley
-    auto: "2"
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"1":    "emmett kelley",
-					"auto": "2",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		// test quoting of values which are not considered strings in yaml 1.1
-		"yaml_1_1_compatibility": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    hero: batman
-    fiend: riddler
-    a: "y"
-    b: y1
-    c: "yes"
-    d: yes1
-    e: "true"
-    f: true1
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"a": "y",
-					"b": "y1",
-					"c": "yes",
-					"d": "yes1",
-					"e": "true",
-					"f": "true1",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-
-		"null_labels": {
-			input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels: null
-`,
-			expectedOutput: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  labels:
-    a: a1
-`,
-			filter: Filter{
-				Labels: labelMap{
-					"a": "a1",
-				},
-				FsSlice: []types.FieldSpec{
-					{
-						Path:               "metadata/labels",
-						CreateIfNotPresent: true,
-					},
-				},
-			},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(filtertest_test.RunFilter(t, tc.input, tc.filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/namespace/doc.go
+++ b/api/filters/namespace/doc.go
@@ -1,9 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package namespace contains a kio.Filter implementation of the kustomize
-// namespace transformer.
-//
-// Special cases for known Kubernetes resources have been hardcoded in addition
-// to those defined by the FsSlice.
-package namespace
--- a/api/filters/namespace/example_test.go
+++ b/api/filters/namespace/example_test.go
@@ -1,50 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package namespace_test
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/filters/namespace"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	fss := builtinconfig.MakeDefaultConfig().NameSpace
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: bar
-`)}},
-		Filters: []kio.Filter{namespace.Filter{Namespace: "app", FsSlice: fss}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	//   namespace: app
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	//   namespace: app
-}
--- a/api/filters/namespace/namespace.go
+++ b/api/filters/namespace/namespace.go
@@ -1,167 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package namespace
-
-import (
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-type Filter struct {
-	// Namespace is the namespace to apply to the inputs
-	Namespace string `yaml:"namespace,omitempty"`
-
-	// FsSlice contains the FieldSpecs to locate the namespace field
-	FsSlice types.FsSlice `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-var _ kio.Filter = Filter{}
-
-func (ns Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	return kio.FilterAll(yaml.FilterFunc(ns.run)).Filter(nodes)
-}
-
-// Run runs the filter on a single node rather than a slice
-func (ns Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
-	// hacks for hardcoded types -- :(
-	if err := ns.hacks(node); err != nil {
-		return nil, err
-	}
-
-	// Remove the fieldspecs that are for hardcoded fields.  The fieldspecs
-	// exist for backwards compatibility with other implementations
-	// of this transformation.
-	// This implementation of the namespace transformation
-	// Does not use the fieldspecs for implementing cases which
-	// require hardcoded logic.
-	ns.FsSlice = ns.removeFieldSpecsForHacks(ns.FsSlice)
-
-	// transformations based on data -- :)
-	err := node.PipeE(fsslice.Filter{
-		FsSlice:    ns.FsSlice,
-		SetValue:   fsslice.SetScalar(ns.Namespace),
-		CreateKind: yaml.ScalarNode, // Namespace is a ScalarNode
-		CreateTag:  yaml.StringTag,
-	})
-	return node, err
-}
-
-// hacks applies the namespace transforms that are hardcoded rather
-// than specified through FieldSpecs.
-func (ns Filter) hacks(obj *yaml.RNode) error {
-	meta, err := obj.GetMeta()
-	if err != nil {
-		return err
-	}
-
-	if err := ns.metaNamespaceHack(obj, meta); err != nil {
-		return err
-	}
-
-	return ns.roleBindingHack(obj, meta)
-}
-
-// metaNamespaceHack is a hack for implementing the namespace transform
-// for the metadata.namespace field on namespace scoped resources.
-// namespace scoped resources are determined by NOT being present
-// in a blacklist of cluster-scoped resource types (by apiVersion and kind).
-//
-// This hack should be updated to allow individual resources to specify
-// if they are cluster scoped through either an annotation on the resources,
-// or through inlined OpenAPI on the resource as a YAML comment.
-func (ns Filter) metaNamespaceHack(obj *yaml.RNode, meta yaml.ResourceMeta) error {
-	gvk := fsslice.GetGVK(meta)
-	if !gvk.IsNamespaceableKind() {
-		return nil
-	}
-	f := fsslice.Filter{
-		FsSlice: []types.FieldSpec{
-			{Path: types.MetadataNamespacePath, CreateIfNotPresent: true},
-		},
-		SetValue:   fsslice.SetScalar(ns.Namespace),
-		CreateKind: yaml.ScalarNode, // Namespace is a ScalarNode
-	}
-	_, err := f.Filter(obj)
-	return err
-}
-
-// roleBindingHack is a hack for implementing the namespace transform
-// for RoleBinding and ClusterRoleBinding resource types.
-// RoleBinding and ClusterRoleBinding have namespace set on
-// elements of the "subjects" field if and only if the subject elements
-// "name" is "default".  Otherwise the namespace is not set.
-//
-// Example:
-//
-// kind: RoleBinding
-// subjects:
-// - name: "default" # this will have the namespace set
-//   ...
-// - name: "something-else" # this will not have the namespace set
-//   ...
-func (ns Filter) roleBindingHack(obj *yaml.RNode, meta yaml.ResourceMeta) error {
-	if meta.Kind != roleBindingKind && meta.Kind != clusterRoleBindingKind {
-		return nil
-	}
-
-	// Lookup the namespace field on all elements.
-	// We should change the fieldspec so this isn't necessary.
-	obj, err := obj.Pipe(yaml.Lookup(subjectsField))
-	if err != nil || yaml.IsEmpty(obj) {
-		return err
-	}
-
-	// add the namespace to each "subject" with name: default
-	err = obj.VisitElements(func(o *yaml.RNode) error {
-		// copied from kunstruct based kustomize NamespaceTransformer plugin
-		// The only case we need to force the namespace
-		// if for the "service account". "default" is
-		// kind of hardcoded here for right now.
-		name, err := o.Pipe(
-			yaml.Lookup("name"), yaml.Match("default"),
-		)
-		if err != nil || yaml.IsEmpty(name) {
-			return err
-		}
-
-		// set the namespace for the default account
-		v := yaml.NewScalarRNode(ns.Namespace)
-		return o.PipeE(
-			yaml.LookupCreate(yaml.ScalarNode, "namespace"),
-			yaml.FieldSetter{Value: v},
-		)
-	})
-
-	return err
-}
-
-// removeFieldSpecsForHacks removes from the list fieldspecs that
-// have hardcoded implementations
-func (ns Filter) removeFieldSpecsForHacks(fs types.FsSlice) types.FsSlice {
-	var val types.FsSlice
-	for i := range fs {
-		// implemented by metaNamespaceHack
-		if fs[i].Path == types.MetadataNamespacePath {
-			continue
-		}
-		// implemented by roleBindingHack
-		if fs[i].Kind == roleBindingKind && fs[i].Path == subjectsField {
-			continue
-		}
-		// implemented by roleBindingHack
-		if fs[i].Kind == clusterRoleBindingKind && fs[i].Path == subjectsField {
-			continue
-		}
-		val = append(val, fs[i])
-	}
-	return val
-}
-
-const (
-	subjectsField          = "subjects"
-	roleBindingKind        = "RoleBinding"
-	clusterRoleBindingKind = "ClusterRoleBinding"
-)
--- a/api/filters/namespace/namespace_test.go
+++ b/api/filters/namespace/namespace_test.go
@@ -1,311 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package namespace_test
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/filters/namespace"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-var tests = []TestCase{
-	{
-		name: "add",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: foo
-`,
-		filter: namespace.Filter{Namespace: "foo"},
-	},
-
-	{
-		name: "null_ns",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  namespace: null
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: null
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: foo
-`,
-		filter: namespace.Filter{Namespace: "foo"},
-	},
-
-	{
-		name: "add-recurse",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
---
-apiVersion: example.com/v1
-kind: Bar
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  namespace: foo
-`,
-		filter: namespace.Filter{Namespace: "foo"},
-	},
-
-	{
-		name: "update",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  # update this namespace
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: bar
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  # update this namespace
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: foo
-`,
-		filter: namespace.Filter{Namespace: "foo"},
-	},
-
-	{
-		name: "update-rolebinding",
-		input: `
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: default
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: default
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: something
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: something
-  namespace: foo
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: default
-  namespace: bar
-metadata:
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: default
-  namespace: bar
-metadata:
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: something
-metadata:
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: RoleBinding
-subjects:
- name: something
-  namespace: foo
-metadata:
-  namespace: bar
-`,
-		filter: namespace.Filter{Namespace: "bar"},
-	},
-
-	{
-		name: "update-clusterrolebinding",
-		input: `
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: default
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: default
-  namespace: foo
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: something
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: something
-  namespace: foo
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: default
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: default
-  namespace: bar
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: something
---
-apiVersion: example.com/v1
-kind: ClusterRoleBinding
-subjects:
- name: something
-  namespace: foo
-`,
-		filter: namespace.Filter{Namespace: "bar"},
-	},
-
-	{
-		name: "data-fieldspecs",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-  namespace: foo
-a:
-  b:
-    c: foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: foo
-a:
-  b:
-    c: foo
-`,
-		filter: namespace.Filter{Namespace: "foo"},
-		fsslice: []types.FieldSpec{
-			{
-				Path:               "a/b/c",
-				CreateIfNotPresent: true,
-			},
-		},
-	},
-}
-
-type TestCase struct {
-	name     string
-	input    string
-	expected string
-	filter   namespace.Filter
-	fsslice  types.FsSlice
-}
-
-var config = builtinconfig.MakeDefaultConfig()
-
-func TestNamespace_Filter(t *testing.T) {
-	for i := range tests {
-		test := tests[i]
-		t.Run(test.name, func(t *testing.T) {
-			test.filter.FsSlice = append(config.NameSpace, test.fsslice...)
-			if !assert.Equal(t,
-				strings.TrimSpace(test.expected),
-				strings.TrimSpace(
-					filtertest_test.RunFilter(t, test.input, test.filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/patchjson6902/doc.go
+++ b/api/filters/patchjson6902/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package namespace contains a kio.Filter implementation of the kustomize
-// patchjson6902 transformer
-package patchjson6902
--- a/api/filters/patchjson6902/example_test.go
+++ b/api/filters/patchjson6902/example_test.go
@@ -1,55 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package patchjson6902
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-  namespace: bar
-`)}},
-		Filters: []kio.Filter{
-			Filter{
-				Patch: `
- op: replace
-  path: /metadata/namespace
-  value: "ns"
-`,
-			},
-		},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	//   namespace: ns
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	//   namespace: ns
-}
--- a/api/filters/patchjson6902/patchjson6902.go
+++ b/api/filters/patchjson6902/patchjson6902.go
@@ -1,65 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package patchjson6902
-
-import (
-	"strings"
-
-	jsonpatch "github.com/evanphx/json-patch"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-	k8syaml "sigs.k8s.io/yaml"
-)
-
-type Filter struct {
-	Patch string
-
-	decodedPatch jsonpatch.Patch
-}
-
-var _ kio.Filter = Filter{}
-
-func (pf Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	decodedPatch, err := pf.decodePatch()
-	if err != nil {
-		return nil, err
-	}
-	pf.decodedPatch = decodedPatch
-	return kio.FilterAll(yaml.FilterFunc(pf.run)).Filter(nodes)
-}
-
-func (pf Filter) decodePatch() (jsonpatch.Patch, error) {
-	patch := pf.Patch
-	// If the patch doesn't look like a JSON6902 patch, we
-	// try to parse it to json.
-	if !strings.HasPrefix(pf.Patch, "[") {
-		p, err := k8syaml.YAMLToJSON([]byte(patch))
-		if err != nil {
-			return nil, err
-		}
-		patch = string(p)
-	}
-	decodedPatch, err := jsonpatch.DecodePatch([]byte(patch))
-	if err != nil {
-		return nil, err
-	}
-	return decodedPatch, nil
-}
-
-func (pf Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
-	// We don't actually use the kyaml library for manipulating the
-	// yaml here. We just marshal it to json and rely on the
-	// jsonpatch library to take care of applying the patch.
-	// This means ordering might not be preserved with this filter.
-	b, err := node.MarshalJSON()
-	if err != nil {
-		return nil, err
-	}
-	res, err := pf.decodedPatch.Apply(b)
-	if err != nil {
-		return nil, err
-	}
-	err = node.UnmarshalJSON(res)
-	return node, err
-}
--- a/api/filters/patchjson6902/patchjson6902_test.go
+++ b/api/filters/patchjson6902/patchjson6902_test.go
@@ -1,173 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package patchjson6902
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	filtertest "sigs.k8s.io/kustomize/api/testutils/filtertest"
-)
-
-const input = `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: myDeploy
-spec:
-  replica: 2
-  template:
-    metadata:
-      labels:
-        old-label: old-value
-    spec:
-      containers:
-      - image: nginx
-        name: nginx
-`
-
-func TestSomething(t *testing.T) {
-	testCases := []struct {
-		testName       string
-		input          string
-		filter         Filter
-		expectedOutput string
-	}{
-		{
-			testName: "single operation, json",
-			input:    input,
-			filter: Filter{
-				Patch: `[
-{"op": "replace", "path": "/spec/replica", "value": 5}
-]`,
-			},
-			expectedOutput: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: myDeploy
-spec:
-  replica: 5
-  template:
-    metadata:
-      labels:
-        old-label: old-value
-    spec:
-      containers:
-      - image: nginx
-        name: nginx
-`,
-		},
-		{
-			testName: "multiple operations, json",
-			input:    input,
-			filter: Filter{
-				Patch: `[
-{"op": "replace", "path": "/spec/template/spec/containers/0/name", "value": "my-nginx"},
-{"op": "add", "path": "/spec/replica", "value": 999},
-{"op": "add", "path": "/spec/template/spec/containers/0/command", "value": ["arg1", "arg2", "arg3"]}
-]`,
-			},
-			expectedOutput: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: myDeploy
-spec:
-  replica: 999
-  template:
-    metadata:
-      labels:
-        old-label: old-value
-    spec:
-      containers:
-      - command:
-        - arg1
-        - arg2
-        - arg3
-        image: nginx
-        name: my-nginx
-`,
-		},
-		{
-			testName: "single operation, yaml",
-			input:    input,
-			filter: Filter{
-				Patch: `
- op: replace
-  path: /spec/replica
-  value: 5
-`,
-			},
-			expectedOutput: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: myDeploy
-spec:
-  replica: 5
-  template:
-    metadata:
-      labels:
-        old-label: old-value
-    spec:
-      containers:
-      - image: nginx
-        name: nginx
-`,
-		},
-		{
-			testName: "multiple operations, yaml",
-			input:    input,
-			filter: Filter{
-				Patch: `
- op: replace
-  path: /spec/template/spec/containers/0/name
-  value: my-nginx
- op: add
-  path: /spec/replica
-  value: 999
- op: add
-  path: /spec/template/spec/containers/0/command
-  value:
-  - arg1
-  - arg2
-  - arg3
-`,
-			},
-			expectedOutput: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: myDeploy
-spec:
-  replica: 999
-  template:
-    metadata:
-      labels:
-        old-label: old-value
-    spec:
-      containers:
-      - command:
-        - arg1
-        - arg2
-        - arg3
-        image: nginx
-        name: my-nginx
-`,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.testName, func(t *testing.T) {
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(
-					filtertest.RunFilter(t, tc.input, tc.filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/patchstrategicmerge/doc.go
+++ b/api/filters/patchstrategicmerge/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package patchstrategicmerge contains a kio.Filter implementation of the
-// kustomize strategic merge patch transformer.
-package patchstrategicmerge
--- a/api/filters/patchstrategicmerge/example_test.go
+++ b/api/filters/patchstrategicmerge/example_test.go
@@ -1,49 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package patchstrategicmerge
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-func ExampleFilter() {
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  replicas: 3
-`)}},
-		Filters: []kio.Filter{Filter{
-			Patch: yaml.MustParse(`
-spec:
-  template:
-    containers:
-    - image: nginx
-`),
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	// spec:
-	//   replicas: 3
-	//   template:
-	//     containers:
-	//     - image: nginx
-}
--- a/api/filters/patchstrategicmerge/patchstrategicmerge.go
+++ b/api/filters/patchstrategicmerge/patchstrategicmerge.go
@@ -1,21 +0,0 @@
-package patchstrategicmerge
-
-import (
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-	"sigs.k8s.io/kustomize/kyaml/yaml/merge2"
-)
-
-type Filter struct {
-	Patch *yaml.RNode
-}
-
-var _ kio.Filter = Filter{}
-
-func (pf Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	return kio.FilterAll(yaml.FilterFunc(pf.run)).Filter(nodes)
-}
-
-func (pf Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
-	return merge2.Merge(pf.Patch, node)
-}
--- a/api/filters/patchstrategicmerge/patchstrategicmerge_test.go
+++ b/api/filters/patchstrategicmerge/patchstrategicmerge_test.go
@@ -1,162 +0,0 @@
-package patchstrategicmerge
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	filtertest "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-func TestFilter(t *testing.T) {
-	testCases := map[string]struct {
-		input    string
-		patch    *yaml.RNode
-		expected string
-	}{
-		"simple patch": {
-			input: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-`,
-			patch: yaml.MustParse(`
-metadata:
-  name: yourDeploy
-`),
-			expected: `
-apiVersion: apps/v1
-metadata:
-  name: yourDeploy
-kind: Deployment
-`,
-		},
-		"container patch": {
-			input: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      containers:
-      - name: foo1
-      - name: foo2
-      - name: foo3
-`,
-			patch: yaml.MustParse(`
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      containers:
-      - name: foo0
-`),
-			expected: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      containers:
-      - name: foo1
-      - name: foo2
-      - name: foo3
-      - name: foo0
-`,
-		},
-		"volumes patch": {
-			input: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      volumes:
-      - name: foo1
-      - name: foo2
-      - name: foo3
-`,
-			patch: yaml.MustParse(`
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      volumes:
-      - name: foo0
-`),
-			expected: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  template:
-    spec:
-      volumes:
-      - name: foo1
-      - name: foo2
-      - name: foo3
-      - name: foo0
-`,
-		},
-		"nested patch": {
-			input: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  containers:
-  - name: nginx
-    args:
-    - abc
-`,
-			patch: yaml.MustParse(`
-spec:
-  containers:
-  - name: nginx
-    args:
-    - def
-`),
-			expected: `
-apiVersion: apps/v1
-metadata:
-  name: myDeploy
-kind: Deployment
-spec:
-  containers:
-  - name: nginx
-    args:
-    - def
-`,
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			f := Filter{
-				Patch: tc.patch,
-			}
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expected),
-				strings.TrimSpace(
-					filtertest.RunFilter(t, tc.input, f))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/prefixsuffix/doc.go
+++ b/api/filters/prefixsuffix/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package prefixsuffix contains a kio.Filter implementation of the kustomize
-// PrefixSuffixTransformer.
-package prefixsuffix
--- a/api/filters/prefixsuffix/example_test.go
+++ b/api/filters/prefixsuffix/example_test.go
@@ -1,47 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package prefixsuffix_test
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/filters/prefixsuffix"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	fss := builtinconfig.MakeDefaultConfig().NamePrefix
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`)}},
-		Filters: []kio.Filter{prefixsuffix.Filter{Prefix: "baz-", FsSlice: fss}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: baz-instance
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: baz-instance
-}
--- a/api/filters/prefixsuffix/prefixsuffix.go
+++ b/api/filters/prefixsuffix/prefixsuffix.go
@@ -1,44 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package prefixsuffix
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// Filter applies resource name prefix's and suffix's using the fieldSpecs
-type Filter struct {
-	Prefix string `json:"prefix,omitempty" yaml:"prefix,omitempty"`
-	Suffix string `json:"suffix,omitempty" yaml:"suffix,omitempty"`
-
-	FsSlice types.FsSlice `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-var _ kio.Filter = Filter{}
-
-func (ns Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	return kio.FilterAll(yaml.FilterFunc(ns.run)).Filter(nodes)
-}
-
-// Run runs the filter on a single node rather than a slice
-func (ns Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
-	// transformations based on data -- :)
-	err := node.PipeE(fsslice.Filter{
-		FsSlice:    ns.FsSlice,
-		SetValue:   ns.set,
-		CreateKind: yaml.ScalarNode, // Name is a ScalarNode
-		CreateTag:  yaml.StringTag,
-	})
-	return node, err
-}
-
-func (ns Filter) set(node *yaml.RNode) error {
-	return fsslice.SetScalar(fmt.Sprintf(
-		"%s%s%s", ns.Prefix, node.YNode().Value, ns.Suffix))(node)
-}
--- a/api/filters/prefixsuffix/prefixsuffix_test.go
+++ b/api/filters/prefixsuffix/prefixsuffix_test.go
@@ -1,167 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package prefixsuffix_test
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/filters/prefixsuffix"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-var tests = []TestCase{
-	{
-		name: "prefix",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: foo-instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: foo-instance
-`,
-		filter: prefixsuffix.Filter{Prefix: "foo-"},
-	},
-
-	{
-		name: "suffix",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance-foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance-foo
-`,
-		filter: prefixsuffix.Filter{Suffix: "-foo"},
-	},
-
-	{
-		name: "prefix-suffix",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: bar-instance-foo
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: bar-instance-foo
-`,
-		filter: prefixsuffix.Filter{Prefix: "bar-", Suffix: "-foo"},
-	},
-
-	{
-		name: "data-fieldspecs",
-		input: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-a:
-  b:
-    c: d
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-a:
-  b:
-    c: d
-`,
-		expected: `
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: foo-instance
-a:
-  b:
-    c: foo-d
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: foo-instance
-a:
-  b:
-    c: foo-d
-`,
-		filter: prefixsuffix.Filter{Prefix: "foo-"},
-		fsslice: []types.FieldSpec{
-			{
-				Path: "a/b/c",
-			},
-		},
-	},
-}
-
-type TestCase struct {
-	name     string
-	input    string
-	expected string
-	filter   prefixsuffix.Filter
-	fsslice  types.FsSlice
-}
-
-var config = builtinconfig.MakeDefaultConfig()
-
-func TestFilter(t *testing.T) {
-	for i := range tests {
-		test := tests[i]
-		t.Run(test.name, func(t *testing.T) {
-			test.filter.FsSlice = append(config.NamePrefix, test.fsslice...)
-			if !assert.Equal(t,
-				strings.TrimSpace(test.expected),
-				strings.TrimSpace(
-					filtertest_test.RunFilter(t, test.input, test.filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/replicacount/doc.go
+++ b/api/filters/replicacount/doc.go
@@ -1,6 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-// Package replicacount contains a kio.Filter implementation of the kustomize
-// ReplicaCountTransformer.
-package replicacount
--- a/api/filters/replicacount/example_test.go
+++ b/api/filters/replicacount/example_test.go
@@ -1,64 +0,0 @@
-package replicacount
-
-import (
-	"bytes"
-	"log"
-	"os"
-
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-)
-
-func ExampleFilter() {
-	err := kio.Pipeline{
-		Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
-apiVersion: example.com/v1
-kind: Foo
-metadata:
-  name: instance
-spec:
-  template:
-    replicas: 5
---
-apiVersion: example.com/v1
-kind: Bar
-metadata:
-  name: instance
-spec:
-  template:
-    replicas: 5
-`)}},
-		Filters: []kio.Filter{Filter{
-			Replica: types.Replica{
-				Count: 42,
-				Name:  "instance",
-			},
-			FsSlice: types.FsSlice{
-				{
-					Path: "spec/template/replicas",
-				},
-			},
-		}},
-		Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
-	}.Execute()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Output:
-	// apiVersion: example.com/v1
-	// kind: Foo
-	// metadata:
-	//   name: instance
-	// spec:
-	//   template:
-	//     replicas: 42
-	// ---
-	// apiVersion: example.com/v1
-	// kind: Bar
-	// metadata:
-	//   name: instance
-	// spec:
-	//   template:
-	//     replicas: 42
-}
--- a/api/filters/replicacount/replicacount.go
+++ b/api/filters/replicacount/replicacount.go
@@ -1,49 +0,0 @@
-package replicacount
-
-import (
-	"strconv"
-
-	"sigs.k8s.io/kustomize/api/filters/fsslice"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// Filter updates/sets replicas fields using the fieldSpecs
-type Filter struct {
-	Replica types.Replica `json:"replica,omitempty" yaml:"replica,omitempty"`
-
-	// FsSlice contains the FieldSpecs to locate the namespace field
-	FsSlice types.FsSlice `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-var _ kio.Filter = Filter{}
-
-func (rc Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	return kio.FilterAll(yaml.FilterFunc(rc.run)).Filter(nodes)
-}
-
-// run processes each node individually.
-func (rc Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
-	meta, err := node.GetMeta()
-	if err != nil {
-		return nil, err
-	}
-
-	// only update resources where the name matches the Replica name.
-	if meta.Name != rc.Replica.Name {
-		return node, nil
-	}
-
-	err = node.PipeE(fsslice.Filter{
-		FsSlice:    rc.FsSlice,
-		SetValue:   rc.set,
-		CreateKind: yaml.ScalarNode, // replicas is a ScalarNode
-		CreateTag:  yaml.IntTag,
-	})
-	return node, err
-}
-
-func (rc Filter) set(node *yaml.RNode) error {
-	return fsslice.SetScalar(strconv.FormatInt(rc.Replica.Count, 10))(node)
-}
--- a/api/filters/replicacount/replicacount_test.go
+++ b/api/filters/replicacount/replicacount_test.go
@@ -1,199 +0,0 @@
-package replicacount
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func TestFilter(t *testing.T) {
-	var config = builtinconfig.MakeDefaultConfig()
-
-	testCases := map[string]struct {
-		input    string
-		expected string
-		filter   Filter
-		fsslice  types.FsSlice
-	}{
-		"update field": {
-			input: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: dep
-spec:
-  replicas: 5
-`,
-			expected: `
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: dep
-spec:
-  replicas: 42
-`,
-			filter: Filter{
-				Replica: types.Replica{
-					Name:  "dep",
-					Count: 42,
-				},
-			},
-			fsslice: types.FsSlice{
-				{
-					Path: "spec/replicas",
-				},
-			},
-		},
-		"add field": {
-			input: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-`,
-			expected: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-    replicas: 42
-`,
-			filter: Filter{
-				Replica: types.Replica{
-					Name:  "cus",
-					Count: 42,
-				},
-			},
-			fsslice: types.FsSlice{
-				{
-					Path:               "spec/template/replicas",
-					CreateIfNotPresent: true,
-				},
-			},
-		},
-
-		"add_field_null": {
-			input: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-    replicas: null
-`,
-			expected: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-    replicas: 42
-`,
-			filter: Filter{
-				Replica: types.Replica{
-					Name:  "cus",
-					Count: 42,
-				},
-			},
-			fsslice: types.FsSlice{
-				{
-					Path:               "spec/template/replicas",
-					CreateIfNotPresent: true,
-				},
-			},
-		},
-		"no update if CreateIfNotPresent is false": {
-			input: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-`,
-			expected: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  template:
-    other: something
-`,
-			filter: Filter{
-				Replica: types.Replica{
-					Name:  "cus",
-					Count: 42,
-				},
-			},
-			fsslice: types.FsSlice{
-				{
-					Path: "spec/template/replicas",
-				},
-			},
-		},
-		"update multiple fields": {
-			input: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  replicas: 5
-  template:
-    replicas: 5
-`,
-			expected: `
-apiVersion: custom/v1
-kind: Custom
-metadata:
-  name: cus
-spec:
-  replicas: 42
-  template:
-    replicas: 42
-`,
-			filter: Filter{
-				Replica: types.Replica{
-					Name:  "cus",
-					Count: 42,
-				},
-			},
-			fsslice: types.FsSlice{
-				{
-					Path: "spec/template/replicas",
-				},
-				{
-					Path: "spec/replicas",
-				},
-			},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			tc.filter.FsSlice = append(config.Replicas, tc.fsslice...)
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expected),
-				strings.TrimSpace(
-					filtertest_test.RunFilter(t, tc.input, tc.filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/filters/valueadd/valueadd.go
+++ b/api/filters/valueadd/valueadd.go
@@ -1,124 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package valueadd
-
-import (
-	"strings"
-
-	"sigs.k8s.io/kustomize/api/filesys"
-	"sigs.k8s.io/kustomize/kyaml/kio"
-	"sigs.k8s.io/kustomize/kyaml/yaml"
-)
-
-// An 'Add' operation aspiring to IETF RFC 6902 JSON.
-//
-// The filter tries to add a value to a node at a particular field path.
-//
-// Kinds of target fields:
-//
-// - Non-existent target field.
-//
-//   The field will be added and the value inserted.
-//
-// - Existing field, scalar or map.
-//
-//   E.g. 'spec/template/spec/containers/[name:nginx]/image'
-//
-//   This behaves like an IETF RFC 6902 Replace operation would;
-//   the existing value is replaced without complaint, even though
-//   this  is an Add operation.  In contrast, a Replace operation
-//   must fail (report an error) if the field doesn't exist.
-//
-// - Existing field, list (array)
-//   Not supported yet.
-//   TODO: Honor fields with RFC-6902-style array indices
-//   TODO: like 'spec/template/spec/containers/2'
-//   TODO: Modify kyaml/yaml/PathGetter to allow this.
-//   The value will be inserted into the array at the given position,
-//   shifting other contents. To instead replace an array entry, use
-//   an implementation of an IETF RFC 6902 Replace operation.
-//
-// For the common case of a filepath in the field value, and a desire
-// to add the value to the filepath (rather than replace the filepath),
-// use a non-zero value of FilePathPosition (see below).
-type Filter struct {
-	// Value is the value to add.
-	//
-	// Empty values are disallowed, i.e. this filter isn't intended
-	// for use in erasing or removing fields. For that, use a filter
-	// more aligned with the IETF RFC 6902 JSON Remove operation.
-	//
-	// At the time of writing, Value's value should be a simple string,
-	// not a JSON document.  This particular filter focuses on easing
-	// injection of a single-sourced cloud project and/or cluster name
-	// into various fields, especially namespace and various filepath
-	// specifications.
-	Value string
-
-	// FieldPath is a JSON-style path to the field intended to hold the value.
-	FieldPath string
-
-	// FilePathPosition is a filepath field index.
-	//
-	// Call the value of this field _i_.
-	//
-	//   If _i_ is zero, negative or unspecified, this field has no effect.
-	//
-	//   If _i_ is > 0, then it's assumed that
-	//   - 'Value' is a string that can work as a directory or file name,
-	//   - the field value intended for replacement holds a filepath.
-	//
-	// The filepath is split into a string slice, the value is inserted
-	// at position [i-1], shifting the rest of the path to the right.
-	// A value of i==1 puts the new value at the start of the path.
-	// This change never converts an absolute path to a relative path,
-	// meaning adding a new field at position i==1 will preserve a
-	// leading slash. E.g. if Value == 'PEACH'
-	//
-	//                  OLD : NEW                    : FilePathPosition
-	//      --------------------------------------------------------
-	//              {empty} : PEACH                  : irrelevant
-	//                    / : /PEACH                 : irrelevant
-	//                  pie : PEACH/pie              : 1 (or less to prefix)
-	//                 /pie : /PEACH/pie             : 1 (or less to prefix)
-	//                  raw : raw/PEACH              : 2 (or more to postfix)
-	//                 /raw : /raw/PEACH             : 2 (or more to postfix)
-	//      a/nice/warm/pie : a/nice/warm/PEACH/pie  : 4
-	//     /a/nice/warm/pie : /a/nice/warm/PEACH/pie : 4
-	//
-	// For robustness (liberal input, conservative output) FilePathPosition
-	// values that that are too large to index the split filepath result in a
-	// postfix rather than an error.  So use 1 to prefix, 9999 to postfix.
-	FilePathPosition int `json:"filePathPosition,omitempty" yaml:"filePathPosition,omitempty"`
-}
-
-var _ kio.Filter = Filter{}
-
-func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
-	_, err := kio.FilterAll(yaml.FilterFunc(
-		func(node *yaml.RNode) (*yaml.RNode, error) {
-			fields := strings.Split(f.FieldPath, "/")
-			// TODO: support SequenceNode.
-			// Presumably here one could look for array indices (digits) at
-			// the end of the field path (as described in IETF RFC 6902 JSON),
-			// and if found, take it as a signal that this should be a
-			// SequenceNode instead of a ScalarNode, and insert the value
-			// into the proper slot, shifting every over.
-			n, err := node.Pipe(yaml.LookupCreate(yaml.ScalarNode, fields...))
-			if err != nil {
-				return node, err
-			}
-			// TODO: allow more kinds
-			if err := yaml.ErrorIfInvalid(n, yaml.ScalarNode); err != nil {
-				return nil, err
-			}
-			newValue := f.Value
-			if f.FilePathPosition > 0 {
-				newValue = filesys.InsertPathPart(
-					n.YNode().Value, f.FilePathPosition-1, newValue)
-			}
-			return n.Pipe(yaml.FieldSetter{StringValue: newValue})
-		})).Filter(nodes)
-	return nodes, err
-}
--- a/api/filters/valueadd/valueadd_test.go
+++ b/api/filters/valueadd/valueadd_test.go
@@ -1,109 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package valueadd
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
-)
-
-const someResource = `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: projects/whatever
-`
-
-func TestValueAddFilter(t *testing.T) {
-	testCases := map[string]struct {
-		input          string
-		expectedOutput string
-		filter         Filter
-	}{
-		"simpleAdd": {
-			input: `
-kind: SomeKind
-`,
-			expectedOutput: `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: valueAdded
-`,
-			filter: Filter{
-				Value:     "valueAdded",
-				FieldPath: "spec/resourceRef/external",
-			},
-		},
-		"replaceExisting": {
-			input: someResource,
-			expectedOutput: `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: valueAdded
-`,
-			filter: Filter{
-				Value:     "valueAdded",
-				FieldPath: "spec/resourceRef/external",
-			},
-		},
-		"prefixExisting": {
-			input: someResource,
-			expectedOutput: `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: valueAdded/projects/whatever
-`,
-			filter: Filter{
-				Value:            "valueAdded",
-				FieldPath:        "spec/resourceRef/external",
-				FilePathPosition: 1,
-			},
-		},
-		"postfixExisting": {
-			input: someResource,
-			expectedOutput: `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: projects/whatever/valueAdded
-`,
-			filter: Filter{
-				Value:            "valueAdded",
-				FieldPath:        "spec/resourceRef/external",
-				FilePathPosition: 99,
-			},
-		},
-		"placeInMiddleOfExisting": {
-			input: someResource,
-			expectedOutput: `
-kind: SomeKind
-spec:
-  resourceRef:
-    external: projects/valueAdded/whatever
-`,
-			filter: Filter{
-				Value:            "valueAdded",
-				FieldPath:        "spec/resourceRef/external",
-				FilePathPosition: 2,
-			},
-		},
-	}
-
-	for tn, tc := range testCases {
-		t.Run(tn, func(t *testing.T) {
-			filter := tc.filter
-			if !assert.Equal(t,
-				strings.TrimSpace(tc.expectedOutput),
-				strings.TrimSpace(filtertest_test.RunFilter(t, tc.input, filter))) {
-				t.FailNow()
-			}
-		})
-	}
-}
--- a/api/go.mod
+++ b/api/go.mod
@@ -1,21 +0,0 @@
-module sigs.k8s.io/kustomize/api
-
-go 1.14
-
-require (
-	github.com/evanphx/json-patch v4.5.0+incompatible
-	github.com/go-openapi/spec v0.19.5
-	github.com/golangci/golangci-lint v1.21.0
-	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
-	github.com/pkg/errors v0.8.1
-	github.com/stretchr/testify v1.4.0
-	github.com/yujunz/go-getter v1.4.1-lite
-	golang.org/x/tools v0.0.0-20191010075000-0337d82405ff
-	gopkg.in/yaml.v2 v2.3.0
-	k8s.io/api v0.17.0
-	k8s.io/apimachinery v0.17.0
-	k8s.io/client-go v0.17.0
-	k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a
-	sigs.k8s.io/kustomize/kyaml v0.3.4
-	sigs.k8s.io/yaml v1.2.0
-)
--- a/api/go.sum
+++ b/api/go.sum
@@ -1,590 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-github.com/360EntSecGroup-Skylar/excelize v1.4.1/go.mod h1:vnax29X2usfl7HHkBrX5EvSCJcmH3dT9luvxzu8iGAE=
-github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
-github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
-github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
-github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
-github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
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-k8s.io/utils v0.0.0-20191114184206-e782cd3c129f/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
-mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed h1:WX1yoOaKQfddO/mLzdV4wptyWgoH/6hwLs7QHTixo0I=
-mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
-mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b h1:DxJ5nJdkhDlLok9K6qO+5290kphDJbHOQO1DFFFTeBo=
-mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f h1:Cq7MalBHYACRd6EesksG1Q8EoIAKOsiZviGKbOLIej4=
-mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f/go.mod h1:4G1h5nDURzA3bwVMZIVpwbkw+04kSxk3rAtzlimaUJw=
-sigs.k8s.io/kustomize/kyaml v0.3.4 h1:RhxnabYltv4mdD5+I7pIaJtae+eaTn4TiZqPT7K+C7A=
-sigs.k8s.io/kustomize/kyaml v0.3.4/go.mod h1:XJL84E6sOFeNrQ7CADiemc1B0EjIxHo3OhW4o1aJYNw=
-sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
-sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4 h1:JPJh2pk3+X4lXAkZIk2RuE/7/FoK9maXw+TNPJhVS/c=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
--- a/api/hasher/hasher_test.go
+++ b/api/hasher/hasher_test.go
@@ -1,41 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package hasher_test
-
-import (
-	"testing"
-
-	. "sigs.k8s.io/kustomize/api/hasher"
-)
-
-func TestSortArrayAndComputeHash(t *testing.T) {
-	array1 := []string{"a", "b", "c", "d"}
-	array2 := []string{"c", "b", "d", "a"}
-	h1, err := SortArrayAndComputeHash(array1)
-	if err != nil {
-		t.Errorf("unexpected error %v", err)
-	}
-	if h1 == "" {
-		t.Errorf("failed to hash %v", array1)
-	}
-	h2, err := SortArrayAndComputeHash(array2)
-	if err != nil {
-		t.Errorf("unexpected error %v", err)
-	}
-	if h2 == "" {
-		t.Errorf("failed to hash %v", array2)
-	}
-	if h1 != h2 {
-		t.Errorf("hash is not consistent with reordered list: %s %s", h1, h2)
-	}
-}
-
-func TestHash(t *testing.T) {
-	// hash the empty string to be sure that sha256 is being used
-	expect := "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
-	sum := Hash("")
-	if expect != sum {
-		t.Errorf("expected hash %q but got %q", expect, sum)
-	}
-}
--- a/api/image/image.go
+++ b/api/image/image.go
@@ -1,50 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package image
-
-import (
-	"regexp"
-	"strings"
-)
-
-// IsImageMatched returns true if the value of t is identical to the
-// image name in the full image name and tag as given by s.
-func IsImageMatched(s, t string) bool {
-	// Tag values are limited to [a-zA-Z0-9_.{}-].
-	// Some tools like Bazel rules_k8s allow tag patterns with {} characters.
-	// More info: https://github.com/bazelbuild/rules_k8s/pull/423
-	pattern, _ := regexp.Compile("^" + t + "(@sha256)?(:[a-zA-Z0-9_.{}-]*)?$")
-	return pattern.MatchString(s)
-}
-
-// Split separates and returns the name and tag parts
-// from the image string using either colon `:` or at `@` separators.
-// Note that the returned tag keeps its separator.
-func Split(imageName string) (name string, tag string) {
-	// check if image name contains a domain
-	// if domain is present, ignore domain and check for `:`
-	ic := -1
-	if slashIndex := strings.Index(imageName, "/"); slashIndex < 0 {
-		ic = strings.LastIndex(imageName, ":")
-	} else {
-		lastIc := strings.LastIndex(imageName[slashIndex:], ":")
-		// set ic only if `:` is present
-		if lastIc > 0 {
-			ic = slashIndex + lastIc
-		}
-	}
-	ia := strings.LastIndex(imageName, "@")
-	if ic < 0 && ia < 0 {
-		return imageName, ""
-	}
-
-	i := ic
-	if ia > 0 {
-		i = ia
-	}
-
-	name = imageName[:i]
-	tag = imageName[i:]
-	return
-}
--- a/api/image/image_test.go
+++ b/api/image/image_test.go
@@ -1,80 +0,0 @@
-// Copyright 2020 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package image
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestIsImageMatched(t *testing.T) {
-	testCases := []struct {
-		testName  string
-		value     string
-		name      string
-		isMatched bool
-	}{
-		{
-			testName:  "identical",
-			value:     "nginx",
-			name:      "nginx",
-			isMatched: true,
-		},
-		{
-			testName:  "name is match",
-			value:     "nginx:12345",
-			name:      "nginx",
-			isMatched: true,
-		},
-		{
-			testName:  "name is not a match",
-			value:     "apache:12345",
-			name:      "nginx",
-			isMatched: false,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.testName, func(t *testing.T) {
-			assert.Equal(t, tc.isMatched, IsImageMatched(tc.value, tc.name))
-		})
-	}
-}
-
-func TestSplit(t *testing.T) {
-	testCases := []struct {
-		testName string
-		value    string
-		name     string
-		tag      string
-	}{
-		{
-			testName: "no tag",
-			value:    "nginx",
-			name:     "nginx",
-			tag:      "",
-		},
-		{
-			testName: "with tag",
-			value:    "nginx:1.2.3",
-			name:     "nginx",
-			tag:      ":1.2.3",
-		},
-		{
-			testName: "with digest",
-			value:    "nginx@12345",
-			name:     "nginx",
-			tag:      "@12345",
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.testName, func(t *testing.T) {
-			name, tag := Split(tc.value)
-			assert.Equal(t, tc.name, name)
-			assert.Equal(t, tc.tag, tag)
-		})
-	}
-}
--- a/api/internal/accumulator/loadconfigfromcrds.go
+++ b/api/internal/accumulator/loadconfigfromcrds.go
@@ -1,188 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator
-
-import (
-	"encoding/json"
-	"strings"
-
-	"github.com/go-openapi/spec"
-	"github.com/pkg/errors"
-	"k8s.io/kube-openapi/pkg/common"
-	"sigs.k8s.io/kustomize/api/filesys"
-	"sigs.k8s.io/kustomize/api/ifc"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/yaml"
-)
-
-type myProperties map[string]spec.Schema
-type nameToApiMap map[string]common.OpenAPIDefinition
-
-// LoadConfigFromCRDs parse CRD schemas from paths into a TransformerConfig
-func LoadConfigFromCRDs(
-	ldr ifc.Loader, paths []string) (*builtinconfig.TransformerConfig, error) {
-	tc := builtinconfig.MakeEmptyConfig()
-	for _, path := range paths {
-		content, err := ldr.Load(path)
-		if err != nil {
-			return nil, err
-		}
-		m, err := makeNameToApiMap(content)
-		if err != nil {
-			return nil, errors.Wrapf(err, "unable to parse open API definition from '%s'", path)
-		}
-		otherTc, err := makeConfigFromApiMap(m)
-		if err != nil {
-			return nil, err
-		}
-		tc, err = tc.Merge(otherTc)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return tc, nil
-}
-
-func makeNameToApiMap(content []byte) (result nameToApiMap, err error) {
-	if content[0] == '{' {
-		err = json.Unmarshal(content, &result)
-	} else {
-		err = yaml.Unmarshal(content, &result)
-	}
-	return
-}
-
-func makeConfigFromApiMap(m nameToApiMap) (*builtinconfig.TransformerConfig, error) {
-	result := builtinconfig.MakeEmptyConfig()
-	for name, api := range m {
-		if !looksLikeAk8sType(api.Schema.SchemaProps.Properties) {
-			continue
-		}
-		tc := builtinconfig.MakeEmptyConfig()
-		err := loadCrdIntoConfig(
-			tc, makeGvkFromTypeName(name), m, name, []string{})
-		if err != nil {
-			return result, err
-		}
-		result, err = result.Merge(tc)
-		if err != nil {
-			return result, err
-		}
-	}
-	return result, nil
-}
-
-// TODO: Get Group and Version for CRD from the
-// openAPI definition once
-// "x-kubernetes-group-version-kind" is available in CRD
-func makeGvkFromTypeName(n string) resid.Gvk {
-	names := strings.Split(n, filesys.SelfDir)
-	kind := names[len(names)-1]
-	return resid.Gvk{Kind: kind}
-}
-
-func looksLikeAk8sType(properties myProperties) bool {
-	_, ok := properties["kind"]
-	if !ok {
-		return false
-	}
-	_, ok = properties["apiVersion"]
-	if !ok {
-		return false
-	}
-	_, ok = properties["metadata"]
-	return ok
-}
-
-const (
-	// "x-kubernetes-annotation": ""
-	xAnnotation = "x-kubernetes-annotation"
-
-	// "x-kubernetes-label-selector": ""
-	xLabelSelector = "x-kubernetes-label-selector"
-
-	// "x-kubernetes-identity": ""
-	xIdentity = "x-kubernetes-identity"
-
-	// "x-kubernetes-object-ref-api-version": <apiVersion name>
-	xVersion = "x-kubernetes-object-ref-api-version"
-
-	// "x-kubernetes-object-ref-kind": <kind name>
-	xKind = "x-kubernetes-object-ref-kind"
-
-	// "x-kubernetes-object-ref-name-key": "name"
-	// default is "name"
-	xNameKey = "x-kubernetes-object-ref-name-key"
-)
-
-// loadCrdIntoConfig loads a CRD spec into a TransformerConfig
-func loadCrdIntoConfig(
-	theConfig *builtinconfig.TransformerConfig, theGvk resid.Gvk, theMap nameToApiMap,
-	typeName string, path []string) (err error) {
-	api, ok := theMap[typeName]
-	if !ok {
-		return nil
-	}
-	for propName, property := range api.Schema.SchemaProps.Properties {
-		_, annotate := property.Extensions.GetString(xAnnotation)
-		if annotate {
-			err = theConfig.AddAnnotationFieldSpec(
-				makeFs(theGvk, append(path, propName)))
-			if err != nil {
-				return
-			}
-		}
-		_, label := property.Extensions.GetString(xLabelSelector)
-		if label {
-			err = theConfig.AddLabelFieldSpec(
-				makeFs(theGvk, append(path, propName)))
-			if err != nil {
-				return
-			}
-		}
-		_, identity := property.Extensions.GetString(xIdentity)
-		if identity {
-			err = theConfig.AddPrefixFieldSpec(
-				makeFs(theGvk, append(path, propName)))
-			if err != nil {
-				return
-			}
-		}
-		version, ok := property.Extensions.GetString(xVersion)
-		if ok {
-			kind, ok := property.Extensions.GetString(xKind)
-			if ok {
-				nameKey, ok := property.Extensions.GetString(xNameKey)
-				if !ok {
-					nameKey = "name"
-				}
-				err = theConfig.AddNamereferenceFieldSpec(
-					builtinconfig.NameBackReferences{
-						Gvk: resid.Gvk{Kind: kind, Version: version},
-						FieldSpecs: []types.FieldSpec{
-							makeFs(theGvk, append(path, propName, nameKey))},
-					})
-				if err != nil {
-					return
-				}
-			}
-		}
-		if property.Ref.GetURL() != nil {
-			loadCrdIntoConfig(
-				theConfig, theGvk, theMap,
-				property.Ref.String(), append(path, propName))
-		}
-	}
-	return nil
-}
-
-func makeFs(in resid.Gvk, path []string) types.FieldSpec {
-	return types.FieldSpec{
-		CreateIfNotPresent: false,
-		Gvk:                in,
-		Path:               strings.Join(path, "/"),
-	}
-}
--- a/api/internal/accumulator/loadconfigfromcrds_test.go
+++ b/api/internal/accumulator/loadconfigfromcrds_test.go
@@ -1,181 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator_test
-
-import (
-	"reflect"
-	"testing"
-
-	"sigs.k8s.io/kustomize/api/filesys"
-	"sigs.k8s.io/kustomize/api/loader"
-
-	. "sigs.k8s.io/kustomize/api/internal/accumulator"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-// This defines two CRD's:  Bee and MyKind.
-//
-// Bee is boring, it's spec has no dependencies.
-//
-// MyKind, however, has a spec that contains
-// a Bee and a (k8s native) Secret.
-const (
-	crdContent = `
-{
-	"github.com/example/pkg/apis/jingfang/v1beta1.Bee": {
-		"Schema": {
-			"description": "Bee",
-			"properties": {
-				"apiVersion": {
-					"description": "APIVersion defines the versioned schema of this representation of an object. Servers should convert 
-recognized schemas to the latest internal value, and may reject unrecognized values. 
-More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources",
-					"type": "string"
-				},
-				"kind": {
-					"description": "Kind is a string value representing the REST resource this object represents. Servers may infer
-this from the endpoint the client submits requests to. Cannot be updated. In CamelCase.
-More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds",
-					"type": "string"
-				},
-				"metadata": {
-					"$ref": "k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta"
-				},
-				"spec": {
-					"$ref": "github.com/example/pkg/apis/jingfang/v1beta1.BeeSpec"
-				},
-				"status": {
-					"$ref": "github.com/example/pkg/apis/jingfang/v1beta1.BeeStatus"
-				}
-			}
-		},
-		"Dependencies": [
-			"github.com/example/pkg/apis/jingfang/v1beta1.BeeSpec",
-			"github.com/example/pkg/apis/jingfang/v1beta1.BeeStatus",
-			"k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta"
-		]
-	},
-	"github.com/example/pkg/apis/jingfang/v1beta1.BeeSpec": {
-		"Schema": {
-			"description": "BeeSpec defines the desired state of Bee"
-		},
-		"Dependencies": []
-	},
-	"github.com/example/pkg/apis/jingfang/v1beta1.BeeStatus": {
-		"Schema": {
-			"description": "BeeStatus defines the observed state of Bee"
-		},
-		"Dependencies": []
-	},
-	"github.com/example/pkg/apis/jingfang/v1beta1.MyKind": {
-		"Schema": {
-			"description": "MyKind",
-			"properties": {
-				"apiVersion": {
-					"description": "APIVersion defines the versioned schema of this representation of an object.
-Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values.
-More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources",
-					"type": "string"
-				},
-				"kind": {
-					"description": "Kind is a string value representing the REST resource this object represents.
-Servers may infer this from the endpoint the client submits requests to. Cannot be updated.
-In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds",
-					"type": "string"
-				},
-				"metadata": {
-					"$ref": "k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta"
-				},
-				"spec": {
-					"$ref": "github.com/example/pkg/apis/jingfang/v1beta1.MyKindSpec"
-				},
-				"status": {
-					"$ref": "github.com/example/pkg/apis/jingfang/v1beta1.MyKindStatus"
-				}
-			}
-		},
-		"Dependencies": [
-			"github.com/example/pkg/apis/jingfang/v1beta1.MyKindSpec",
-			"github.com/example/pkg/apis/jingfang/v1beta1.MyKindStatus",
-			"k8s.io/apimachinery/pkg/apis/meta/v1.ObjectMeta"
-		]
-	},
-	"github.com/example/pkg/apis/jingfang/v1beta1.MyKindSpec": {
-		"Schema": {
-			"description": "MyKindSpec defines the desired state of MyKind",
-			"properties": {
-				"beeRef": {
-					"x-kubernetes-object-ref-api-version": "v1beta1",
-					"x-kubernetes-object-ref-kind": "Bee",
-					"$ref": "github.com/example/pkg/apis/jingfang/v1beta1.Bee"
-				},
-				"secretRef": {
-					"description": "If defined, we use this secret for configuring the MYSQL_ROOT_PASSWORD 
-If it is not set we generate a secret dynamically",
-					"x-kubernetes-object-ref-api-version": "v1",
-					"x-kubernetes-object-ref-kind": "Secret",
-					"$ref": "k8s.io/api/core/v1.LocalObjectReference"
-				}
-			}
-		},
-		"Dependencies": [
-			"github.com/example/pkg/apis/jingfang/v1beta1.Bee",
-			"k8s.io/api/core/v1.LocalObjectReference"
-		]
-	},
-	"github.com/example/pkg/apis/jingfang/v1beta1.MyKindStatus": {
-		"Schema": {
-			"description": "MyKindStatus defines the observed state of MyKind"
-		},
-		"Dependencies": []
-	}
-}
-`
-)
-
-func TestLoadCRDs(t *testing.T) {
-	nbrs := []builtinconfig.NameBackReferences{
-		{
-			Gvk: resid.Gvk{Kind: "Secret", Version: "v1"},
-			FieldSpecs: []types.FieldSpec{
-				{
-					CreateIfNotPresent: false,
-					Gvk:                resid.Gvk{Kind: "MyKind"},
-					Path:               "spec/secretRef/name",
-				},
-			},
-		},
-		{
-			Gvk: resid.Gvk{Kind: "Bee", Version: "v1beta1"},
-			FieldSpecs: []types.FieldSpec{
-				{
-					CreateIfNotPresent: false,
-					Gvk:                resid.Gvk{Kind: "MyKind"},
-					Path:               "spec/beeRef/name",
-				},
-			},
-		},
-	}
-
-	expectedTc := &builtinconfig.TransformerConfig{
-		NameReference: nbrs,
-	}
-
-	fSys := filesys.MakeFsInMemory()
-	fSys.WriteFile("/testpath/crd.json", []byte(crdContent))
-	ldr, err := loader.NewLoader(loader.RestrictionRootOnly, "/testpath", fSys)
-	if err != nil {
-		t.Fatalf("unexpected error:%v", err)
-	}
-
-	actualTc, err := LoadConfigFromCRDs(ldr, []string{"crd.json"})
-	if err != nil {
-		t.Fatalf("unexpected error:%v", err)
-	}
-	if !reflect.DeepEqual(actualTc, expectedTc) {
-		t.Fatalf("expected\n %v\n but got\n %v\n", expectedTc, actualTc)
-	}
-}
--- a/api/internal/accumulator/namereferencetransformer.go
+++ b/api/internal/accumulator/namereferencetransformer.go
@@ -1,269 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator
-
-import (
-	"fmt"
-	"log"
-
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/transform"
-)
-
-type nameReferenceTransformer struct {
-	backRefs []builtinconfig.NameBackReferences
-}
-
-var _ resmap.Transformer = &nameReferenceTransformer{}
-
-// newNameReferenceTransformer constructs a nameReferenceTransformer
-// with a given slice of NameBackReferences.
-func newNameReferenceTransformer(br []builtinconfig.NameBackReferences) resmap.Transformer {
-	if br == nil {
-		log.Fatal("backrefs not expected to be nil")
-	}
-	return &nameReferenceTransformer{backRefs: br}
-}
-
-// Transform updates name references in resource A that
-// refer to resource B, given that B's name may have
-// changed.
-//
-// For example, a HorizontalPodAutoscaler (HPA)
-// necessarily refers to a Deployment, the thing that
-// the HPA scales. The Deployment name might change
-// (e.g. prefix added), and the reference in the HPA
-// has to be fixed.
-//
-// In the outer loop over the ResMap below, say we
-// encounter a specific HPA. Then, in scanning backrefs,
-// we encounter an entry like
-//
-//   - kind: Deployment
-//     fieldSpecs:
-//     - kind: HorizontalPodAutoscaler
-//       path: spec/scaleTargetRef/name
-//
-// This entry says that an HPA, via its
-// 'spec/scaleTargetRef/name' field, may refer to a
-// Deployment.  This match to HPA means we may need to
-// modify the value in its 'spec/scaleTargetRef/name'
-// field, by searching for the thing it refers to,
-// and getting its new name.
-//
-// As a filter, and search optimization, we compute a
-// subset of all resources that the HPA could refer to,
-// by excluding objects from other namespaces, and
-// excluding objects that don't have the same prefix-
-// suffix mods as the HPA.
-//
-// We look in this subset for all Deployment objects
-// with a resId that has a Name matching the field value
-// present in the HPA.  If no match do nothing; if more
-// than one match, it's an error.
-//
-// We overwrite the HPA name field with the value found
-// in the Deployment's name field (the name in the raw
-// object - the modified name - not the unmodified name
-// in the Deployment's resId).
-//
-// This process assumes that the name stored in a ResId
-// (the ResMap key) isn't modified by name transformers.
-// Name transformers should only modify the name in the
-// body of the resource object (the value in the ResMap).
-//
-func (o *nameReferenceTransformer) Transform(m resmap.ResMap) error {
-	// TODO: Too much looping, here and in transitive calls.
-	for _, referrer := range m.Resources() {
-		var candidates resmap.ResMap
-		for _, target := range o.backRefs {
-			for _, fSpec := range target.FieldSpecs {
-				if referrer.OrgId().IsSelected(&fSpec.Gvk) {
-					if candidates == nil {
-						candidates = m.SubsetThatCouldBeReferencedByResource(referrer)
-					}
-					err := transform.MutateField(
-						referrer.Map(),
-						fSpec.PathSlice(),
-						fSpec.CreateIfNotPresent,
-						o.getNewNameFunc(
-							// referrer could be an HPA instance,
-							// target could be Gvk for Deployment,
-							// candidate a list of resources "reachable"
-							// from the HPA.
-							referrer, target.Gvk, candidates))
-					if err != nil {
-						return err
-					}
-				}
-			}
-		}
-	}
-	return nil
-}
-
-// selectReferral picks the referral among a subset of candidates.
-// It returns the current name and namespace of the selected candidate.
-// Note that the content of the referricalCandidateSubset slice is most of the time
-// identical to the referralCandidates resmap. Still in some cases, such
-// as ClusterRoleBinding, the subset only contains the resources of a specific
-// namespace.
-func (o *nameReferenceTransformer) selectReferral(
-	oldName string,
-	referrer *resource.Resource,
-	target resid.Gvk,
-	referralCandidates resmap.ResMap,
-	referralCandidateSubset []*resource.Resource) (interface{}, interface{}, error) {
-
-	for _, res := range referralCandidateSubset {
-		id := res.OrgId()
-		if id.IsSelected(&target) && res.GetOriginalName() == oldName {
-			matches := referralCandidates.GetMatchingResourcesByOriginalId(id.Equals)
-			// If there's more than one match, there's no way
-			// to know which one to pick, so emit error.
-			if len(matches) > 1 {
-				return nil, nil, fmt.Errorf(
-					"multiple matches for %s:\n  %v",
-					id, getIds(matches))
-			}
-			// In the resource, note that it is referenced
-			// by the referrer.
-			res.AppendRefBy(referrer.CurId())
-			// Return transformed name of the object,
-			// complete with prefixes, hashes, etc.
-			return res.GetName(), res.GetNamespace(), nil
-		}
-	}
-
-	return oldName, nil, nil
-}
-
-// utility function to replace a simple string by the new name
-func (o *nameReferenceTransformer) getSimpleNameField(
-	oldName string,
-	referrer *resource.Resource,
-	target resid.Gvk,
-	referralCandidates resmap.ResMap,
-	referralCandidateSubset []*resource.Resource) (interface{}, error) {
-
-	newName, _, err := o.selectReferral(oldName, referrer, target,
-		referralCandidates, referralCandidateSubset)
-
-	return newName, err
-}
-
-// utility function to replace name field within a map[string]interface{}
-// and leverage the namespace field.
-func (o *nameReferenceTransformer) getNameAndNsStruct(
-	inMap map[string]interface{},
-	referrer *resource.Resource,
-	target resid.Gvk,
-	referralCandidates resmap.ResMap) (interface{}, error) {
-
-	// Example:
-	if _, ok := inMap["name"]; !ok {
-		return nil, fmt.Errorf(
-			"%#v is expected to contain a name field", inMap)
-	}
-	oldName, ok := inMap["name"].(string)
-	if !ok {
-		return nil, fmt.Errorf(
-			"%#v is expected to contain a name field of type string", oldName)
-	}
-
-	subset := referralCandidates.Resources()
-	if namespacevalue, ok := inMap["namespace"]; ok {
-		namespace := namespacevalue.(string)
-		bynamespace := referralCandidates.GroupedByOriginalNamespace()
-		if _, ok := bynamespace[namespace]; !ok {
-			return inMap, nil
-		}
-		subset = bynamespace[namespace]
-	}
-
-	newname, newnamespace, err := o.selectReferral(oldName, referrer, target,
-		referralCandidates, subset)
-	if err != nil {
-		return nil, err
-	}
-
-	if (newname == oldName) && (newnamespace == nil) {
-		// no candidate found.
-		return inMap, nil
-	}
-
-	inMap["name"] = newname
-	if newnamespace != "" {
-		// We don't want value "" to replace value "default" since
-		// the empty string is handled as a wild card here not default namespace
-		// by kubernetes.
-		inMap["namespace"] = newnamespace
-	}
-	return inMap, nil
-
-}
-
-func (o *nameReferenceTransformer) getNewNameFunc(
-	referrer *resource.Resource,
-	target resid.Gvk,
-	referralCandidates resmap.ResMap) func(in interface{}) (interface{}, error) {
-	return func(in interface{}) (interface{}, error) {
-		switch thing := in.(type) {
-		case string:
-			return o.getSimpleNameField(thing, referrer, target,
-				referralCandidates, referralCandidates.Resources())
-		case map[string]interface{}:
-			// Kind: ValidatingWebhookConfiguration
-			// FieldSpec is webhooks/clientConfig/service
-			return o.getNameAndNsStruct(thing, referrer, target,
-				referralCandidates)
-		case []interface{}:
-			for idx, item := range thing {
-				switch value := item.(type) {
-				case string:
-					// Kind: Role/ClusterRole
-					// FieldSpec is rules.resourceNames
-					newName, err := o.getSimpleNameField(value, referrer, target,
-						referralCandidates, referralCandidates.Resources())
-					if err != nil {
-						return nil, err
-					}
-					thing[idx] = newName
-				case map[string]interface{}:
-					// Kind: RoleBinding/ClusterRoleBinding
-					// FieldSpec is subjects
-					// Note: The corresponding fieldSpec had been changed from
-					// from path: subjects/name to just path: subjects. This is
-					// what get mutatefield to request the mapping of the whole
-					// map containing namespace and name instead of just a simple
-					// string field containing the name
-					newMap, err := o.getNameAndNsStruct(value, referrer, target,
-						referralCandidates)
-					if err != nil {
-						return nil, err
-					}
-					thing[idx] = newMap
-				default:
-					return nil, fmt.Errorf(
-						"%#v is expected to be either a []string or a []map[string]interface{}", in)
-				}
-			}
-			return in, nil
-		default:
-			return nil, fmt.Errorf(
-				"%#v is expected to be either a string or a []interface{}", in)
-		}
-	}
-}
-
-func getIds(rs []*resource.Resource) []string {
-	var result []string
-	for _, r := range rs {
-		result = append(result, r.CurId().String()+"\n")
-	}
-	return result
-}
--- a/api/internal/accumulator/namereferencetransformer_test.go
+++ b/api/internal/accumulator/namereferencetransformer_test.go
--- a/api/internal/accumulator/refvartransformer.go
+++ b/api/internal/accumulator/refvartransformer.go
@@ -1,117 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator
-
-import (
-	"fmt"
-
-	expansion2 "sigs.k8s.io/kustomize/api/internal/accumulator/expansion"
-
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-type refVarTransformer struct {
-	varMap            map[string]interface{}
-	replacementCounts map[string]int
-	fieldSpecs        []types.FieldSpec
-	mappingFunc       func(string) interface{}
-}
-
-// newRefVarTransformer returns a new refVarTransformer
-// that replaces $(VAR) style variables with values.
-// The fieldSpecs are the places to look for occurrences of $(VAR).
-func newRefVarTransformer(
-	varMap map[string]interface{}, fs []types.FieldSpec) *refVarTransformer {
-	return &refVarTransformer{
-		varMap:     varMap,
-		fieldSpecs: fs,
-	}
-}
-
-// replaceVars accepts as 'in' a string, or string array, which can have
-// embedded instances of $VAR style variables, e.g. a container command string.
-// The function returns the string with the variables expanded to their final
-// values.
-func (rv *refVarTransformer) replaceVars(in interface{}) (interface{}, error) {
-	switch vt := in.(type) {
-	case []interface{}:
-		var xs []interface{}
-		for _, a := range in.([]interface{}) {
-			x, ok := a.(string)
-			if !ok {
-				return nil, fmt.Errorf("expected array of strings, found %v", in)
-			}
-			xs = append(xs, expansion2.Expand(x, rv.mappingFunc))
-		}
-		return xs, nil
-	case map[string]interface{}:
-		inMap := in.(map[string]interface{})
-		xs := make(map[string]interface{}, len(inMap))
-		for k, v := range inMap {
-			s, ok := v.(string)
-			if !ok {
-				// This field can not contain a $(VAR) since it is not
-				// of string type. For instance .spec.replicas: 3 in
-				// a Deployment object
-				xs[k] = v
-			} else {
-				// This field can potentially contains a $(VAR) since it is
-				// of string type. For instance .spec.replicas: $(REPLICAS)
-				// in a Deployment object
-				xs[k] = expansion2.Expand(s, rv.mappingFunc)
-			}
-		}
-		return xs, nil
-	case interface{}:
-		s, ok := in.(string)
-		if !ok {
-			// This field can not contain a $(VAR) since it is not of string type.
-			return in, nil
-		}
-		// This field can potentially contain a $(VAR) since it is
-		// of string type.
-		return expansion2.Expand(s, rv.mappingFunc), nil
-	// staticcheck erroneously claims that `case nil`
-	// is unreachable here, so suppressing it.
-	//nolint:staticcheck
-	case nil:
-		return nil, nil
-	default:
-		return "", fmt.Errorf("invalid type encountered %T", vt)
-	}
-}
-
-// UnusedVars returns slice of Var names that were unused
-// after a Transform run.
-func (rv *refVarTransformer) UnusedVars() []string {
-	var unused []string
-	for k := range rv.varMap {
-		_, ok := rv.replacementCounts[k]
-		if !ok {
-			unused = append(unused, k)
-		}
-	}
-	return unused
-}
-
-// Transform replaces $(VAR) style variables with values.
-func (rv *refVarTransformer) Transform(m resmap.ResMap) error {
-	rv.replacementCounts = make(map[string]int)
-	rv.mappingFunc = expansion2.MappingFuncFor(
-		rv.replacementCounts, rv.varMap)
-	for _, res := range m.Resources() {
-		for _, fieldSpec := range rv.fieldSpecs {
-			if res.OrgId().IsSelected(&fieldSpec.Gvk) {
-				if err := transform.MutateField(
-					res.Map(), fieldSpec.PathSlice(),
-					false, rv.replaceVars); err != nil {
-					return err
-				}
-			}
-		}
-	}
-	return nil
-}
--- a/api/internal/accumulator/refvartransformer_test.go
+++ b/api/internal/accumulator/refvartransformer_test.go
@@ -1,166 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator
-
-import (
-	"reflect"
-	"testing"
-
-	"sigs.k8s.io/kustomize/api/k8sdeps/kunstruct"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	resmaptest_test "sigs.k8s.io/kustomize/api/testutils/resmaptest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func TestRefVarTransformer(t *testing.T) {
-	type given struct {
-		varMap map[string]interface{}
-		fs     []types.FieldSpec
-		res    resmap.ResMap
-	}
-	type expected struct {
-		res    resmap.ResMap
-		unused []string
-	}
-	testCases := []struct {
-		description string
-		given       given
-		expected    expected
-		errMessage  string
-	}{
-		{
-			description: "var replacement in map[string]",
-			given: given{
-				varMap: map[string]interface{}{
-					"FOO": "replacementForFoo",
-					"BAR": "replacementForBar",
-					"BAZ": int64(5),
-					"BOO": true,
-				},
-				fs: []types.FieldSpec{
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/map"},
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/slice"},
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/interface"},
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/nil"},
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/num"},
-				},
-				res: resmaptest_test.NewRmBuilder(
-					t, resource.NewFactory(kunstruct.NewKunstructuredFactoryImpl())).
-					Add(map[string]interface{}{
-						"apiVersion": "v1",
-						"kind":       "ConfigMap",
-						"metadata": map[string]interface{}{
-							"name": "cm1",
-						},
-						"data": map[string]interface{}{
-							"map": map[string]interface{}{
-								"item1": "$(FOO)",
-								"item2": "bla",
-								"item3": "$(BAZ)",
-								"item4": "$(BAZ)+$(BAZ)",
-								"item5": "$(BOO)",
-								"item6": "if $(BOO)",
-								"item7": 2019,
-							},
-							"slice": []interface{}{
-								"$(FOO)",
-								"bla",
-								"$(BAZ)",
-								"$(BAZ)+$(BAZ)",
-								"$(BOO)",
-								"if $(BOO)",
-							},
-							"interface": "$(FOO)",
-							"nil":       nil,
-							"num":       2019,
-						}}).ResMap(),
-			},
-			expected: expected{
-				res: resmaptest_test.NewRmBuilder(
-					t, resource.NewFactory(kunstruct.NewKunstructuredFactoryImpl())).
-					Add(map[string]interface{}{
-						"apiVersion": "v1",
-						"kind":       "ConfigMap",
-						"metadata": map[string]interface{}{
-							"name": "cm1",
-						},
-						"data": map[string]interface{}{
-							"map": map[string]interface{}{
-								"item1": "replacementForFoo",
-								"item2": "bla",
-								"item3": int64(5),
-								"item4": "5+5",
-								"item5": true,
-								"item6": "if true",
-								"item7": 2019,
-							},
-							"slice": []interface{}{
-								"replacementForFoo",
-								"bla",
-								int64(5),
-								"5+5",
-								true,
-								"if true",
-							},
-							"interface": "replacementForFoo",
-							"nil":       nil,
-							"num":       2019,
-						}}).ResMap(),
-				unused: []string{"BAR"},
-			},
-		},
-		{
-			description: "var replacement panic in map[string]",
-			given: given{
-				varMap: map[string]interface{}{},
-				fs: []types.FieldSpec{
-					{Gvk: resid.Gvk{Version: "v1", Kind: "ConfigMap"}, Path: "data/slice"},
-				},
-				res: resmaptest_test.NewRmBuilder(
-					t, resource.NewFactory(kunstruct.NewKunstructuredFactoryImpl())).
-					Add(map[string]interface{}{
-						"apiVersion": "v1",
-						"kind":       "ConfigMap",
-						"metadata": map[string]interface{}{
-							"name": "cm1",
-						},
-						"data": map[string]interface{}{
-							"slice": []interface{}{5}, // noticeably *not* a []string
-						}}).ResMap(),
-			},
-			errMessage: "expected array of strings, found [5]",
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.description, func(t *testing.T) {
-			// arrange
-			tr := newRefVarTransformer(tc.given.varMap, tc.given.fs)
-
-			// act
-			err := tr.Transform(tc.given.res)
-
-			// assert
-			if tc.errMessage != "" {
-				if err == nil {
-					t.Fatalf("missing expected error %v", tc.errMessage)
-				} else if err.Error() != tc.errMessage {
-					t.Fatalf("actual error doesn't match expected error: \nACTUAL: %v\nEXPECTED: %v", err.Error(), tc.errMessage)
-				}
-			} else {
-				if err != nil {
-					t.Errorf("unexpected error: %v", err)
-				}
-
-				a, e := tc.given.res, tc.expected.res
-				if !reflect.DeepEqual(a, e) {
-					err = e.ErrorIfNotEqualLists(a)
-					t.Fatalf("actual doesn't match expected: \nACTUAL:\n%v\nEXPECTED:\n%v\nERR: %v", a, e, err)
-				}
-			}
-		})
-	}
-}
--- a/api/internal/accumulator/resaccumulator_test.go
+++ b/api/internal/accumulator/resaccumulator_test.go
@@ -1,417 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package accumulator_test
-
-import (
-	"bytes"
-	"log"
-	"os"
-	"strings"
-	"testing"
-
-	. "sigs.k8s.io/kustomize/api/internal/accumulator"
-	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
-	"sigs.k8s.io/kustomize/api/k8sdeps/kunstruct"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	resmaptest_test "sigs.k8s.io/kustomize/api/testutils/resmaptest"
-	"sigs.k8s.io/kustomize/api/types"
-)
-
-func makeResAccumulator(t *testing.T) (*ResAccumulator, *resource.Factory) {
-	ra := MakeEmptyAccumulator()
-	err := ra.MergeConfig(builtinconfig.MakeDefaultConfig())
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	rf := resource.NewFactory(
-		kunstruct.NewKunstructuredFactoryImpl())
-	err = ra.AppendAll(
-		resmaptest_test.NewRmBuilder(t, rf).
-			Add(map[string]interface{}{
-				"apiVersion": "apps/v1",
-				"kind":       "Deployment",
-				"metadata": map[string]interface{}{
-					"name": "deploy1",
-				},
-				"spec": map[string]interface{}{
-					"template": map[string]interface{}{
-						"spec": map[string]interface{}{
-							"containers": []interface{}{
-								map[string]interface{}{
-									"command": []interface{}{
-										"myserver",
-										"--somebackendService $(SERVICE_ONE)",
-										"--yetAnother $(SERVICE_TWO)",
-									},
-								},
-							},
-						},
-					},
-				}}).
-			Add(map[string]interface{}{
-				"apiVersion": "v1",
-				"kind":       "Service",
-				"metadata": map[string]interface{}{
-					"name": "backendOne",
-				}}).
-			Add(map[string]interface{}{
-				"apiVersion": "v1",
-				"kind":       "Service",
-				"metadata": map[string]interface{}{
-					"name": "backendTwo",
-				}}).ResMap())
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	return ra, rf
-}
-
-func TestResolveVarsHappy(t *testing.T) {
-	ra, _ := makeResAccumulator(t)
-	err := ra.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne"},
-		},
-		{
-			Name: "SERVICE_TWO",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendTwo"},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	err = ra.ResolveVars()
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	c := getCommand(find("deploy1", ra.ResMap()))
-	if c != "myserver --somebackendService backendOne --yetAnother backendTwo" {
-		t.Fatalf("unexpected command: %s", c)
-	}
-}
-
-func TestResolveVarsOneUnused(t *testing.T) {
-	ra, _ := makeResAccumulator(t)
-	err := ra.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne"},
-		},
-		{
-			Name: "SERVICE_UNUSED",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendTwo"},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	var buf bytes.Buffer
-	log.SetOutput(&buf)
-	defer func() {
-		log.SetOutput(os.Stderr)
-	}()
-	err = ra.ResolveVars()
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	expectLog(t, buf, "well-defined vars that were never replaced: SERVICE_UNUSED")
-	c := getCommand(find("deploy1", ra.ResMap()))
-	if c != "myserver --somebackendService backendOne --yetAnother $(SERVICE_TWO)" {
-		t.Fatalf("unexpected command: %s", c)
-	}
-}
-
-func expectLog(t *testing.T, log bytes.Buffer, expect string) {
-	if !strings.Contains(log.String(), expect) {
-		t.Fatalf("expected log containing '%s', got '%s'", expect, log.String())
-	}
-}
-
-func TestResolveVarsVarNeedsDisambiguation(t *testing.T) {
-	ra, rf := makeResAccumulator(t)
-
-	rm0 := resmap.New()
-	err := rm0.Append(
-		rf.FromMap(
-			map[string]interface{}{
-				"apiVersion": "v1",
-				"kind":       "Service",
-				"metadata": map[string]interface{}{
-					"name":      "backendOne",
-					"namespace": "fooNamespace",
-				},
-			}))
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	err = ra.AppendAll(rm0)
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-
-	err = ra.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne",
-			},
-		},
-	})
-	if err == nil {
-		t.Fatalf("expected error")
-	}
-	if !strings.Contains(
-		err.Error(), "unable to disambiguate") {
-		t.Fatalf("unexpected err: %v", err)
-	}
-}
-
-func makeNamespacedConfigMapWithDataProviderValue(
-	namespace string,
-	value string,
-) map[string]interface{} {
-	return map[string]interface{}{
-		"apiVersion": "v1",
-		"kind":       "ConfigMap",
-		"metadata": map[string]interface{}{
-			"name":      "environment",
-			"namespace": namespace,
-		},
-		"data": map[string]interface{}{
-			"provider": value,
-		},
-	}
-}
-
-func makeVarToNamepaceAndPath(
-	name string,
-	namespace string,
-	path string,
-) types.Var {
-	return types.Var{
-		Name: name,
-		ObjRef: types.Target{
-			Gvk:       resid.Gvk{Version: "v1", Kind: "ConfigMap"},
-			Name:      "environment",
-			Namespace: namespace,
-		},
-		FieldRef: types.FieldSelector{FieldPath: path},
-	}
-}
-
-func TestResolveVarConflicts(t *testing.T) {
-	rf := resource.NewFactory(kunstruct.NewKunstructuredFactoryImpl())
-
-	// create configmaps in foo and bar namespaces with `data.provider` values.
-	fooAws := makeNamespacedConfigMapWithDataProviderValue("foo", "aws")
-	barAws := makeNamespacedConfigMapWithDataProviderValue("bar", "aws")
-	barGcp := makeNamespacedConfigMapWithDataProviderValue("bar", "gcp")
-
-	// create two variables with (apparently) conflicting names that point to
-	// fieldpaths that could be generalized.
-	varFoo := makeVarToNamepaceAndPath("PROVIDER", "foo", "data.provider")
-	varBar := makeVarToNamepaceAndPath("PROVIDER", "bar", "data.provider")
-
-	// create accumulators holding apparently conflicting vars that are not
-	// actually in conflict because they point to the same concrete value.
-	rm0 := resmap.New()
-	rm0.Append(rf.FromMap(fooAws))
-	ac0 := MakeEmptyAccumulator()
-	ac0.AppendAll(rm0)
-	ac0.MergeVars([]types.Var{varFoo})
-
-	rm1 := resmap.New()
-	rm1.Append(rf.FromMap(barAws))
-	ac1 := MakeEmptyAccumulator()
-	ac1.AppendAll(rm1)
-	ac1.MergeVars([]types.Var{varBar})
-
-	// validate that two vars of the same name which reference the same concrete
-	// value do not produce a conflict.
-	err := ac0.MergeAccumulator(ac1)
-	if err == nil {
-		t.Fatalf("see bug gh-1600")
-	}
-
-	// create an accumulator will have an actually conflicting value with the
-	// two above (because it contains a variable whose name is used in the other
-	// accumulators AND whose concrete values are different).
-	rm2 := resmap.New()
-	rm2.Append(rf.FromMap(barGcp))
-	ac2 := MakeEmptyAccumulator()
-	ac2.AppendAll(rm2)
-	ac2.MergeVars([]types.Var{varBar})
-	err = ac1.MergeAccumulator(ac2)
-	if err == nil {
-		t.Fatalf("dupe vars w/ different concrete values should conflict")
-	}
-}
-
-func TestResolveVarsGoodResIdBadField(t *testing.T) {
-	ra, _ := makeResAccumulator(t)
-	err := ra.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne"},
-			FieldRef: types.FieldSelector{FieldPath: "nope_nope_nope"},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	err = ra.ResolveVars()
-	if err == nil {
-		t.Fatalf("expected error")
-	}
-	if !strings.Contains(
-		err.Error(),
-		"not found in corresponding resource") {
-		t.Fatalf("unexpected err: %v", err)
-	}
-}
-
-func TestResolveVarsUnmappableVar(t *testing.T) {
-	ra, _ := makeResAccumulator(t)
-	err := ra.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_THREE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "doesNotExist"},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	err = ra.ResolveVars()
-	if err == nil {
-		t.Fatalf("expected error")
-	}
-	if !strings.Contains(
-		err.Error(),
-		"cannot be mapped to a field in the set of known resources") {
-		t.Fatalf("unexpected err: %v", err)
-	}
-}
-
-func TestResolveVarsWithNoambiguation(t *testing.T) {
-	ra1, rf := makeResAccumulator(t)
-	err := ra1.MergeVars([]types.Var{
-		{
-			Name: "SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne",
-			},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-
-	// Create another accumulator having a resource with different prefix
-	ra2 := MakeEmptyAccumulator()
-
-	m := resmaptest_test.NewRmBuilder(t, rf).
-		Add(map[string]interface{}{
-			"apiVersion": "apps/v1",
-			"kind":       "Deployment",
-			"metadata": map[string]interface{}{
-				"name": "deploy2",
-			},
-			"spec": map[string]interface{}{
-				"template": map[string]interface{}{
-					"spec": map[string]interface{}{
-						"containers": []interface{}{
-							map[string]interface{}{
-								"command": []interface{}{
-									"myserver",
-									"--somebackendService $(SUB_SERVICE_ONE)",
-								},
-							},
-						},
-					},
-				},
-			}}).
-		Add(map[string]interface{}{
-			"apiVersion": "v1",
-			"kind":       "Service",
-			"metadata": map[string]interface{}{
-				"name": "backendOne",
-			}}).ResMap()
-
-	// Make it seem like this resource
-	// went through a prefix transformer.
-	r := m.GetByIndex(1)
-	r.AddNamePrefix("sub-")
-	r.SetName("sub-backendOne") // original name remains "backendOne"
-
-	err = ra2.AppendAll(m)
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-
-	err = ra2.MergeVars([]types.Var{
-		{
-			Name: "SUB_SERVICE_ONE",
-			ObjRef: types.Target{
-				Gvk:  resid.Gvk{Version: "v1", Kind: "Service"},
-				Name: "backendOne",
-			},
-		},
-	})
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-	err = ra1.MergeAccumulator(ra2)
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-
-	err = ra1.ResolveVars()
-	if err != nil {
-		t.Fatalf("unexpected err: %v", err)
-	}
-}
-
-func find(name string, resMap resmap.ResMap) *resource.Resource {
-	for _, r := range resMap.Resources() {
-		if r.GetName() == name {
-			return r
-		}
-	}
-	return nil
-}
-
-// Assumes arg is a deployment, returns the command of first container.
-func getCommand(r *resource.Resource) string {
-	var m map[string]interface{}
-	var c []interface{}
-	m, _ = r.Map()["spec"].(map[string]interface{})
-	m, _ = m["template"].(map[string]interface{})
-	m, _ = m["spec"].(map[string]interface{})
-	c, _ = m["containers"].([]interface{})
-	m, _ = c[0].(map[string]interface{})
-
-	cmd, _ := m["command"].([]interface{})
-	n := make([]string, len(cmd))
-	for i, v := range cmd {
-		n[i] = v.(string)
-	}
-	return strings.Join(n, " ")
-}
--- a/api/internal/crawl/README.md
+++ b/api/internal/crawl/README.md
@@ -1,428 +0,0 @@
-## What is this?
-### In short
-Be the GoDoc.org of k8s configuration files.
-
-### More explicitly
-Support k8s document indexing from open-source configurations in order to make
-it easy for people to learn to use a new feature, explore k8s configs in a
-central hub, and see some metrics about kustomize use.
-
-We want people to be able to support three main classes of queries:
-
-1. Structured document queries: how should I use the following fields
-   - Grace periods: `spec:template:spec:terminationGracePeriod`?
-   - Kustomize inline patch: `patches:patch`?
-
-2. Key value queries: how should I use this more specific use case of a
-   structure configuration.
-   - HorizontalPodAutoScalers: `kind=HorizontalPodAutoScaler`?
-   - Patches on StatefulSets: `patches:target:kind=StatefulSet`?
-
-3. Full text search: search the comments and the document text from any
-   type of k8s config file.
-
-## Road map
-There is a lot that can be added in order to improve the state of this
-application. Some more details along with general thoughts and comments can be
-found in the Roadmap.md file in this directory. This README contains only
-what can be considered as mostly complete and iterable parts of this project.
-
-## Running this project
-Everything is configured using kubernetes, so it should be easy for people to
-spin this up on any k8s cluster. Everything should just work (TM).
-
-The config files live in the `config` directory.
-
-```
-config
-├── base
-│   └── kustomization.yaml
-├── crawler
-│   ├── base
-│   │   ├── github_api_secret.txt
-│   │   └── kustomization.yaml
-│   ├── cronjob
-│   │   ├── cronjob.yaml
-│   │   └── kustomization.yaml
-│   └── job
-│       ├── job.yaml
-│       └── kustomization.yaml
-├── elastic
-│   └── ...
-├── redis
-│   ├── document_keystore
-│   │   ├── kustomization.yaml
-│   │   ├── redis.yaml
-│   │   └── service.yaml
-│   └── http_cache
-│       ├── kustomization.yaml
-│       ├── redis.yaml
-│       └── service.yaml
-├── webapp
-│   ├── backend
-│   │   ├── deployment.yaml
-│   │   ├── kustomization.yaml
-│   │   └── service.yaml
-│   └── frontend
-│       ├── deployment.yaml
-│       ├── kustomization.yaml
-│       └── service.yaml
-└── schema_files
-    └── kustomization_index
-        ├── es_index_mappings.json
-        └── es_index_settings.json
-```
-
-To get everything up and running you have to:
-
-1. Get some instance of elasticsearch working... and configure the
-   configmapGenerator in `config/base` to point to the right endpoint(s). The
-   configurations that need this value to be populated are the following:
-    - `config/crawler/cronjob` to run periodic crawls.
-    - `config/crawler/job` to run crawls on demand.
-    - `config/webapp/backend` to run the search server.
-
-2. Configure the elasticsearch indices:
-```
-kustomize build config/schema_files/kustomization_index | kubectl apply -f -
-```
-This will run a `curl` command that reads json data from a ConfigMap. This will
-setup the schema.  If you want to make more complex modifications to the
-schema, you should refer to the elastic docs to figure out whether the mapping
-can be added to the current index, or whether you will need to copy the
-existing index into a different one with the appropriate mappings. Modifications
-can be made by using the elasticsearch go library and writing a simple program,
-or it can be made with any http command to the appropriate server endpoint from
-within the cluster. Unfortunately I did not have the time to write a few helper
-tools for this. Feel free to contact me if you need help with modifying
-elasticsearch configs, I'm by no means an expert, but I can try to help.
-
-3. (Optional) run the redis http chache for the crawler:
-```
-kubectl apply -k config/redis/http_cache
-```
-  This will create a deployment for the cache, and a service. The crawler should
-  be configured to connect to the `http_cache` if it exists, but you can always
-  check the logs to make sure it connects, and that the identifiers match in the
-  crawler configuration and for the service endpoint.
-
-  The please be aware that the cache does not have a persistent volume.
-
-4. Configure the main redis instance:
-```
-kubectl apply -k config/redis/document_keystore
-```
-  This will create a StatefulSet with a volume of 4GiB for a redis instance.
-
-5. Get an access token from GitHub.
-
-To be able to kindly ask GitHub for it's data on k8s config files, you'll need
-to create an access\_token. From my understanding, this is the only way to do
-these code search queries (without first specifying a repository).
-
-To generate a token, go to your GitHub's account in Settings > Developer
-Settings > Personal access tokens. It should look like this.
-
-![GitHub Token 1](
-https://sigs.k8s.io/kustomize/internal/tools/pictures/github_token.png)
-
-From here you want to generate a new token and  have the following
-configuration:
-
-![GitHub Token 1](
-https://sigs.k8s.io/kustomize/internal/tools/pictures/token_config.png)
-
-If you have uses for any other data from this token, (org data, or something
-else) you can pick and choose, but be careful since it can grant this
-application access to your notifications, etc. However, any such extension
-is explicitly a non-goal and would not be maintained by this project.
-
-6. Launch the crawler:
-```
-kustomize build config/crawler/cronjob | kubectl apply -f -
-```
-This will periodically run the crawler every day according to the cron timing
-rules in the cronjob.yaml file.
-
-Instead, to get the crawler running now, you can run:
-```
-kustomize build config/crawler/cronjob | kubectl apply -f -
-```
-which will launch a non-periodic version of the crawler. It will take a few
-minutes for the crawler to split the search, but then config files should
-start to get populated within 20 minutes. It may take a while to do the
-first crawl, since it has to fetch rate-limited endpoints for each new file it
-finds. It should get significantly faster to update in the future.
-
-5. Launch the search backend
-```
-kustomize build config/webapp/backend | kubectl apply -f -
-```
-
-6. Launch the search frontend
-```
-kustomize build config/webapp/frontend | kubectl apply -f -
-```
-
-## Notes about the components
-
-### Elasticsearch
-I will add a basic working setup soon. I just did the lazy thing and used an
-already packaged solution. Most clouds will provide their own elastic
-environments, however, Elasticsearch is also working on their own
-implementation of a
-![k8s operator](https://www.elastic.co/elasticsearch-kubernetes), which might
-be worth checking out. Please note that it comes with its own license
-agreement.
-
-### Redis
-There are two Redis instances that are used in this application.
-
-One of them is configured to have on disk persistence, so make sure to have
-that set up in your kubernetes cluster. Also note that it is running on a
-single master node (i.e. it does not automatically shard keys to multiple head
-nodes as part of a highly available cluster). Since it's storing a sparse
-graph, I can't imagine this being much of an issue, but it's probably worth
-mentioning.
-
-The other Redis instance is running as a HTTP (RFC 7234) cache for etags from
-GitHub (or any other document store from which we could crawl/index). This one
-does not require full persistent storage on disk. The caching strategy is an
-LRU cache which is probably a good starting point. It might be worth it to
-investigate other cache policies, but I think LRU will work well since
-documents may or may not expire anyway, and the amount of memory allocated for
-keys is fairly large, so eviction of frequently used documents seems unlikely
-anyway.
-
-### Nginx + Angular
-There is a Dockerfile included for generating the container image with Nginx
-(using the default package) and adding all of the supporting compiled angular
-files. Any modifications to the code-base should be compatible with this setup,
-so all that's needed is to rebuild the container image, and possibly modify
-the image tags in the k8s file.
-
-### Supporting Go binaries
-There are a few go binaries that each have their own Dockerfile to build
-containers in which to run them on k8s, namely the crawler and the search
-service. Their configurations are not optimal (read: needs to be cleaned up),
-but they are functional.
-
-## Technical details
-
-### Overall design and implementations
-
-There are a few components that are all running together in order to get
-the overall application to work smoothly. This section will provide a brief
-overview of each component with the following sections going into more details.
-
-The overall structure is outlined in the following figure:
-![overview](
-https://sigs.k8s.io/kustomize/internal/tools/pictures/sys_arch.png)
-
-#### Crawler
-The leftmost component consists of a crawler with an http cache of GitHub
-queries does two things, it first looks at the list of documents in
-elasticsearch and tries to update them. In doing so, it maintains a set of
-newly updated files to exclude them from other parts of the crawl.
-
-To find newly added documents, the crawler crawls any new dependencies
-introduced in the document updating step and it also queries GitHub for the
-most recently indexed kustomization.\* files. Each new file will be processed
-for efficient text queries and put into the document index. Any new dependency
-will also incur more crawl operations. Finally, a graphical
-representation of the documents and their dependencies is built in Redis to be
-used for graph algorithms such as PageRank and component analysis.
-
-#### Data library
-There are a few helper libaries for dealing with Elasticsearch, Redis and
-documents. This is not persistent, nor is it centralized. They act as small
-components that help to package common pieces of code. Eventually it may make
-sense to merge all of it together and make a proper persistent model around
-this while providing an external API for document insertion/deletion. But
-that is definitely out of scope in terms of getting this to run. However
-there are limitations with the current model in terms of minimizing the
-API surface for the different components of the application. For now this
-problem is mostly mitigated by having the query server only connected to
-a data node of the Elasticsearch cluster, but the problem of knowing what
-is accessible and what isn't is left to the programmer instead of being
-clearly and explicitly supported by the API.
-
-#### Server
-Uses the data library to communicate with the data store and answer queries.
-Processes the user entered text queries into somewhat optimized elasticsearch
-queries. Provides a few endpoints to get different metrics and to eventually
-allow for registration of remote repositories.
-
-This application has an exposing service in order to allow users of the
-application access to queries and the results.
-
-#### Nginx + Angular
-Communicates directly with the backend server to forward user queries and
-their results. Presents the results on an interface. It's still pretty simple
-looking but it seems usable (to me).
-
-
-### Crawling GitHub
-With the use of API keys, GitHub allows account owners to search for files
-using their API.
-
-The search endpoints allow for the use of metadata search
-that is fairly useful/powerful. For instance they provide a `filename:` keyword
-that permits us to look for `kustomization.yaml`, `kustomization.yml`, etc.
-This enables the fetching of a list of kustomization documents, from which
-we can get the actual content from another endpoint
-(raw.githubusercontent.com).
-
-However, the search API is fairly limited. There is a restriction to the number
-of documents that can be retrieved from this method. One possible way to
-mitigate this would be to periodically query GitHub for results, sorted by the
-last indexed time. This would allow you to collect most documents from this
-point forwards. The downside to this is that it may require a large number of
-requests to their API since you cannot know when new files will be added.
-Furthermore, there is a possibility that you would not be able to get all of
-files either, depending on the velocity of growth.
-
-The approach that was taken to mitigate this is to use the `filesize:` keyword
-and to shard the search space into contiguous buckets of appropriate size in
-order to get all of the documents. This is fairly efficient, since you can find
-a good enough way to shard the documents in
-`lg(max file size) * number of documents / 1000` API queries. Moreover, since
-queries are paginated with at most 100 results per query, this solution is
-competitive with getting the optimal (non-contiguous) sharding of result sets.
-Furthermore, filesize queries can be cached to minimize the total number of
-queries called to the API in order to shard the search space. This is done by
-querying for file size intervals that always start with 0..X and binary
-searching over the `filesize:` space. This will allow you to reuse a lot of
-queries when you're looking for the next range, since it is upper bounded and
-lower bounded to a smaller number of queries within a range that has also been
-queried. I think this is only true because filesizes are power law distributed,
-so searches will typically require less queries as they progress from left to
-right.
-
-However, this method in no way depends on intervals of the form 0..X, as
-the number of documents in the many intervals of the range search could be
-added together to also make this work. This approach just seemed simpler to
-implement, maintain, and debug so it was preferred.
-
-To get an idea of how efficient this method is, to shard the search space of
-7000 documents, it will only take ~90 API range queries which should only take
-a few minutes. While actually fetching the documents and their relevant
-metadata (creation time, etc.) will take several hours. Furthermore, this
-could be made more efficient if a prior distribution is approximated.
-This prior could be scaled to the number of documents that need to be fetched,
-and then finding a shard that has an adequate number of requests, will only
-take a few queries per shard. It could probably be supported in a constant
-number of size queries if the size of each shard is halved which shouldn't
-have terrible performance impact for the retrieval. However, there where
-more pressing things to implement. I might revisit this later.
-
-### Document Indexing and Processing
-In order to support simple text queries the structured documents must be
-processed in some way that makes searching them easy. The current method
-is to recursively traverse the map of configurations to generate each sub-path
-and each key-value pair for the leaf nodes of the recursion tree.
-
-However, note that this means that a document has to be valid yaml/json
-format in order for indexing to happen. The rest of the document is treated
-as mostly text and uses default text settings from Elasticsearch.
-
-What this means is that for the following yaml document:
-
-```yaml
-resources:
- service.yaml
- deployment.yaml
-
-configmapGenerator:
- name: app-configuration
-  files:
-  - config.yaml
-
-patchesJson6902:
- target:
-    version: v1
-    kind: StatefulSet
-    name: ss-name
-  path: ss-patch.yaml
- target:
-    version: v1
-    kind: Deployment
-    name: dep-name
-  path: dep-patch.yaml
-```
-
-the following flattened structure would look like:
-```
-{
-  "identifiers": [
-    "resources",
-    "configmapGenerator",
-    "configmapGenerator:name",
-    "configmapGenerator:files",
-    "patchesJson6902",
-    "patchesJson6902:target",
-    "patchesJson6902:target:version",
-    "patchesJson6902:target:kind",
-    "patchesJson6902:target:name",
-    "patchesJson6902:path",
-  ],
-  "values": [
-    "resources=service.yaml",
-    "resources=deployment.yaml",
-    "configmapGenerator:name=app-configuration",
-    "configmapGenerator:files=config.yaml",
-    "patchesJson6902:target:version=v1",
-    "patchesJson6902:target:kind=StatefulSet",
-    "patchesJson6902:target:name=ss-name",
-    "patchesJson6902:path=ss-patch.yaml",
-    "patchesJson6902:target:kind=Deployment",
-    "patchesJson6902:target:name=dep-name",
-    "patchesJson6902:path=dep-patch.yaml",
-  ],
-  ...
-}
-```
-
-Note that unique paths and values are deduplicated.
-
-On the search side, exact queries will be prioritized, but the document paths
-and key=value pairs will also be analyzed with 3-grams to have some amount of
-fuzzy search. The reason that a Levenshtein-Distance was not used instead, is due
-to searching multiple fields at the same time, which is a use case where
-Elasticsearch does not support proper fuzzy searching.
-
-### Document Search
-Given a text query, each token is considered separately. Each token will be fed
-through a handful of analyzers on the Elasticsearch side, and will be compared
-with the reverse document index of each document fields. It will then determine
-the best matching documents. Text ordering is largely insignificant. This makes
-sense for the structured search, but may leave room for improvement for the
-text only search within the document.
-
-Each token _must_ be matched, so each white space character acts as a
-conjunction of individual queries. There are also ways of telling
-Elasticsearch that some things _should_ match, but I think for now it makes
-more sense to leave it as is.
-
-I think this behavior is sufficient to make the search feel fairly intuitive
-while providing support for fairly complex use cases.
-
-### Metrics Computation
-From the each kustomization document that is indexed, we can find it's
-resources that are publicly available. This includes other kustomizations.
-From this, we can build a directed graph of dependencies and reverse
-dependencies.
-
-This opens up the possibility to add a plethora of graph metrics that can
-give the project maintainers feedback and insight into how people are using
-their tools.
-
-Some of these are useful such as getting an idea for how large the dependency
-graphs actually grow in practice, and can be used to find _popular_
-kustomizations within the corpus. This lends itself to implementing PageRank
-to help bubble up popular results as good search results. I unfortunately
-did not have the time to implement the algorithm, but I do plan to revisit
-this sometime soon to add a few good and efficient implementations of useful
-graph algorithms that would be useful to have. See the Roadmap.md for a more
-complete list of features that could be added and how I think they could be
-implemented.
--- a/api/internal/crawl/ROADMAP.md
+++ b/api/internal/crawl/ROADMAP.md
@@ -1,176 +0,0 @@
-# Road map and comments about this work
-
-From working on this project, here is a collection of thoughts and suggestions
-for future improvements. For any questions about this, or to request help do
-not hesitate to contact @damienr74 on GitHub, my email should be listed.
-
-I think this project has the potential for the K8s community to promote best
-practices. If this becomes popular, It could become easier to find
-*subjectively good* configurations. This can act as a way to guide newcomers
-to k8s config features that are easy to maintain, practical, and tested in some
-real world environment. However, a lot of work remains to be made if this is
-to happen. Extracting and ranking semantic-level information from the open
-source configuration files, is definitely not trivial, and will require a lot of
-though and consideration from the experts and the patterns that successful k8s
-project follow. This, is outside of my scope having little to no experience with
-k8s other than working on this project; however, if you have ideas I can
-probably suggest approaches in order to implement it, having worked a lot on
-this project.
-
-### Improving configuration files and container configs
-I did not have a lot of time to refactor the images to use configmaps for
-everything. This is a good thing to improve, should be fairly easy. Another
-thing that could make the user experience of launcing this could be to make all
-of the go utilities be subcommands to the same binary/container image. This
-would reduce the number of things that would have to be rebuilt, in order to get
-it running, and it would make the application (and its components) more self
-contained. (also has some disadvantages, so I'll let someone else decide.
-
-### Adding graph metrics
-From the Redis graph representation, we are able to run a multitude of graph
-algorithms (not all of which are implemented).
-
-The simplest one would be to run kruskal's algorithm to find connected
-components, and to compute graph metrics on each component. Here are some of the
-metrics that may be useful:
-
-+ Average size and histograms of the sizes of each components.
-
-+ Average size and histograms of the node with the highest in degree (rdeps) of
-  each component.
-
-+ Average size and histograms of the number of repositories in a connected
-  component.
-
-+ Any other metric that may be helpful to measure the scale of the kustomize
-  import graph.
-
-Another cool thing that may be helpful, would be to output the graph
-representation of deps/rdeps. This should be fairly easy to do with graphviz/dot
-so if anyone really wants this, I (damienr74) should be able to do it. Feel free
-to send me an email or to @ mention me in an issue.
-
-Note: dfs could also be used to find connected components, but I think union
-find is preferable, since the results can be stored and modified very
-efficiently. The only challenging part would be to implement deleting of edges
-and nodes from a component efficiently, but I know it is possible to support
-these operations with a union find structure.
-
-### Implementing PageRank
-The graph is set up to be able to efficiently compute PageRank since the edge
-weights are real valued, and the graph representation is sparse which means that
-it will fit in the memory of a single machine which will make the processing
-much more efficient.
-
-It could also be implemented as a Redis script, but I feel like there's
-something fundamentally wrong with implementing PageRank in lua. :P
-
-### Implement feature tracking
-Each day, when the crawler finds and indexes these structured documents,
-it should insert aggregate data to a separate index. This data could look like the
-following:
-
-```
-{
-  "kind": "kustomization",
-  "added_identifiers": [
-    {
-      "identifier": "some:new:k8s:feature",
-      "addedIn": [
-        "docID1",
-        "docID100",
-        "docID45",
-        ...
-      ],
-    },
-    {
-      "identifier": "another:k8s:feature",
-      "documents": [
-        ...
-      ],
-    },
-    ...
-  ]
-
-  "removed_identifiers": [
-    {
-      "identifier": "some:deprecated:field",
-      "documents": [
-        ...
-      ]
-    }
-  ]
-}
-```
-
-This would make it fairly easy to get deep insight into:
- the speed at which things can effectively be deprecated.
- how many people are migrating to current best practices.
- how many documents get updated frequently/rarely.
- detailed cross sections of growth/regression over conjunctions of features.
- a world of possibilities.
-
-This is also something that I would be interested to work on sometime soon, so
-feel free to contact me (damienr74) or ask questions about this.
-
-As needed, it could be a good idea to also aggregate past data with a larger
-granularity. for instance each month, the past 30 days can be aggregated into
-weekish durations, And every year these weekly aggregations can be converted
-into monthly summaries depending on how much data this ends up being, and how
-much you want to pay for the storage of this data.
-
-Another cool way to compress this data would be to dynamically compress this
-data into a logarithmic number of buckets with decreasing granularity. But it
-seems like overkill for the amount of data that we'd likely get.
-
-### The UI probably needs a lot of work
-I'm not much of a UI/UX person and have little to no experience in developing
-these types of applications. If anyone with Angular experience wants to dive in
-and completely restructure the app to make the UI/UX/Code health better that
-would be greatly appreciated.
-
-### Query tuning probably still has to be adjusted
-I'm also not an expert in Elasticsearch. From what I could read in the docs,
-I think I've made sane decisions in converting user queries into meaningful
-Elasticsearch queries, but I'm sure there are a lot of improvements that remain
-to be done in order to get more accurate results.
-
-
-### Some other signals that indicate the presence of a good configuration file
-There are lots of heuristics that could be used to achieve this. Here are a
-couple in no particular order:
-
-+ Penalize for the number of yaml `---` document splits. I'm not sure what the
-  general consensus is, but I think it's better to separate them, since it
-  makes git commits less noisy, it's a trivial transformation, and it makes
-  config files smaller. However, I can understand the argument that its somewhat
-  practical to keep an overall view of the configurations together (maybe).
-
-+ Penalize the number of unique identifiers in a structured document. I think
-  this makes sense, since we don't want to have someone game the search engine
-  to match documents with every possible path from the k8s docs. PageRank might
-  help with this to some extent, but with a small corpus it would be fairly easy
-  to game.
-
-+ Assign weights to the usefulness of certain fields. It would be good to
-  promote documents that use `keyRefFromConfigMap`, liveness probes, etc.
-
-These are the main ones I can think of, but I'm sure there are a *ton* of
-ways to achieve this.
-
-If the corpus gets large enough, we might even be able to use *blockchains*,
-*machine learning*, and maybe even self-driving cars.
-
-### Add more support for indexing of other k8s/kustomize related data
-One thing that jumps to mind is the use of kustomize plugins. They are easy
-to track since they all have an unused global variable: `var KustomizePluggin`
-it would be easy to run the pluginator command and generate godocs for each
-go file with this unique identifier.
-
-For the sake of completeness, here is the full GitHub query that we can use to
-find these:
-`api.github.com/search/code?q=var+KustomizePlugin+extension%3A.go&access_token=access_token`
-
-Godoc will not show much, since most packages will be using package main, but
-using pluginator we can make it a properly named package such that Godoc would
-actually generate the relevant documentation.
--- a/api/internal/crawl/backend/search_backend.go
+++ b/api/internal/crawl/backend/search_backend.go
@@ -1,195 +0,0 @@
-package server
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"log"
-	"net/http"
-	"os"
-	"strconv"
-	"strings"
-
-	"github.com/gorilla/mux"
-	"github.com/rs/cors"
-
-	"sigs.k8s.io/kustomize/api/internal/crawl/index"
-)
-
-type kustomizeSearch struct {
-	ctx context.Context
-	// Eventually pIndex *index.PlugginIndex
-	idx    *index.KustomizeIndex
-	router *mux.Router
-	log    *log.Logger
-}
-
-// New server. Creating a server does not launch it. To launch simply:
-//	srv, _ := NewKustomizeSearch(context.Backgroud())
-//	err := srv.Serve()
-//	if err != nil {
-//		// Handle server issues.
-//	}
-//
-// The server has three enpoints, two of which are functional:
-//
-// /search: processes the ?q= parameter for a text query and
-// returns a list of 10 resutls starting from the ?from= value provided,
-// with the default being zero.
-//
-// /metrics: returns overall metrics about the files indexed. Returns
-// timeseries data for kustomization files, and returns breakdown of file
-// counts by their 'kind' fields
-//
-// /register: not implemented, but meant as an endpoint for adding new
-// kustomization files to the corpus.
-func NewKustomizeSearch(ctx context.Context) (*kustomizeSearch, error) {
-	idx, err := index.NewKustomizeIndex(ctx, "kustomize")
-	if err != nil {
-		return nil, err
-	}
-
-	ks := &kustomizeSearch{
-		ctx:    ctx,
-		idx:    idx,
-		router: mux.NewRouter(),
-		log: log.New(os.Stdout, "Kustomize server: ",
-			log.LstdFlags|log.Llongfile|log.LUTC),
-	}
-
-	return ks, nil
-}
-
-// Set up common middleware and the routes for the server.
-func (ks *kustomizeSearch) routes() {
-
-	// Setup middleware.
-	ks.router.Use(func(handler http.Handler) http.Handler {
-		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Header().Set("Content-Type", "application/json")
-			handler.ServeHTTP(w, r)
-		})
-	})
-
-	ks.router.HandleFunc("/liveness", ks.liveness()).Methods(http.MethodGet)
-	ks.router.HandleFunc("/readiness", ks.readiness()).Methods(http.MethodGet)
-	ks.router.HandleFunc("/search", ks.search()).Methods(http.MethodGet)
-	ks.router.HandleFunc("/metrics", ks.metrics()).Methods(http.MethodGet)
-	ks.router.HandleFunc("/register", ks.register()).Methods(http.MethodPost)
-}
-
-// Start listening and serving on the provided port.
-func (ks *kustomizeSearch) Serve(port int) error {
-	ks.routes()
-	handler := cors.Default().Handler(ks.router)
-	s := &http.Server{
-		Addr:    fmt.Sprintf(":%d", port),
-		Handler: handler,
-		// Timeouts/Limits
-	}
-
-	return s.ListenAndServe()
-}
-
-// /liveness endpoint
-func (ks *kustomizeSearch) liveness() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
-	}
-}
-
-// /readyness endpoint
-func (ks *kustomizeSearch) readiness() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		opt := index.KustomizeSearchOptions{}
-		_, err := ks.idx.Search("", opt)
-		if err != nil {
-			http.Error(w,
-				`{ "error": "could not connect to database" }`,
-				http.StatusInternalServerError)
-			return
-		}
-		w.WriteHeader(http.StatusOK)
-	}
-}
-
-// /register endpoint.
-func (ks *kustomizeSearch) register() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		http.Error(w, "not implemented", http.StatusInternalServerError)
-	}
-}
-
-// /search endpoint.
-func (ks *kustomizeSearch) search() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		values := r.URL.Query()
-
-		queries := values["q"]
-		ks.log.Println("Query: ", values)
-
-		var from int
-		fromParam := values["from"]
-		if len(fromParam) > 0 {
-			from, _ = strconv.Atoi(fromParam[0])
-			if from < 0 {
-				from = 0
-			}
-		}
-		_, noKinds := values["nokinds"]
-
-		opt := index.KustomizeSearchOptions{
-			SearchOptions: index.SearchOptions{
-				Size: 10,
-				From: from,
-			},
-			KindAggregation: !noKinds,
-		}
-
-		results, err := ks.idx.Search(strings.Join(queries, " "), opt)
-		if err != nil {
-			ks.log.Println("Error: ", err)
-			http.Error(w, fmt.Sprintf(
-				`{ "error": "could not complete the query" }`),
-				http.StatusInternalServerError)
-			return
-		}
-
-		enc := json.NewEncoder(w)
-		setIndent(enc)
-		if err = enc.Encode(results); err != nil {
-			http.Error(w, `{ "error": "failed to send back results" }`,
-				http.StatusInternalServerError)
-			return
-		}
-		return
-	}
-}
-
-// metrics endpoint.
-func (ks *kustomizeSearch) metrics() http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		res, err := ks.idx.Search("", index.KustomizeSearchOptions{
-			KindAggregation:       true,
-			TimeseriesAggregation: true,
-		})
-		if err != nil {
-			http.Error(w, `{ "error": "could not perform the search."}`,
-				http.StatusInternalServerError)
-			return
-		}
-
-		enc := json.NewEncoder(w)
-		setIndent(enc)
-		if err := enc.Encode(res); err != nil {
-			http.Error(w, `{ "error": "could not format return value" }`,
-				http.StatusInternalServerError)
-			return
-		}
-	}
-}
-
-// make json response human readable.
-func setIndent(e *json.Encoder) {
-	e.SetIndent("", "  ")
-}
--- a/api/internal/crawl/cmd/backend/Dockerfile
+++ b/api/internal/crawl/cmd/backend/Dockerfile
@@ -1,14 +0,0 @@
-FROM golang:1.11 AS build
-
-ARG GO111MODULE=on
-
-WORKDIR /go/src/sigs.k8s.io/kustomize/api/internal/crawl
-COPY . /go/src/sigs.k8s.io/kustomize/api/internal/crawl
-
-RUN go mod download
-RUN CGO_ENABLED=0 go install sigs.k8s.io/kustomize/api/internal/crawl/cmd/backend/
-
-FROM scratch
-COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=build /go/bin/backend /
-ENTRYPOINT ["/backend"]
--- a/api/internal/crawl/cmd/backend/main.go
+++ b/api/internal/crawl/cmd/backend/main.go
@@ -1,29 +0,0 @@
-package main
-
-import (
-	"context"
-	"log"
-	"os"
-	server "sigs.k8s.io/kustomize/api/internal/crawl/backend"
-	"strconv"
-)
-
-func main() {
-	portStr := os.Getenv("PORT")
-	port, err := strconv.Atoi(portStr)
-	if portStr == "" || err != nil {
-		log.Fatalf("$PORT(%s) must be set to an integer\n", portStr)
-	}
-
-	ctx := context.Background()
-
-	ks, err := server.NewKustomizeSearch(ctx)
-	if err != nil {
-		log.Fatalf("Error creating kustomize server: %v", ks)
-	}
-
-	err = ks.Serve(port)
-	if err != nil {
-		log.Fatalf("Error while running server: %v", err)
-	}
-}
--- a/api/internal/crawl/cmd/crawler/Dockerfile
+++ b/api/internal/crawl/cmd/crawler/Dockerfile
@@ -1,15 +0,0 @@
-FROM golang:1.14 AS build
-
-ARG GO111MODULE=on
-
-WORKDIR /go/src/sigs.k8s.io/kustomize/api/internal/crawl
-COPY . /go/src/sigs.k8s.io/kustomize//api/internal/crawl
-
-RUN go mod download
-RUN CGO_ENABLED=0 go install -v ./cmd/crawler/crawler.go
-
-FROM scratch
-COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=build /go/bin/crawler /
-ENTRYPOINT ["/crawler"]
-CMD []
--- a/api/internal/crawl/cmd/crawler/crawler.go
+++ b/api/internal/crawl/cmd/crawler/crawler.go
@@ -1,206 +0,0 @@
-package main
-
-import (
-	"context"
-	"flag"
-	"fmt"
-	"log"
-	"net/http"
-	"os"
-	"time"
-
-	"sigs.k8s.io/kustomize/api/internal/crawl/utils"
-
-	"sigs.k8s.io/kustomize/api/internal/crawl/crawler"
-	"sigs.k8s.io/kustomize/api/internal/crawl/crawler/github"
-	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
-	"sigs.k8s.io/kustomize/api/internal/crawl/httpclient"
-	"sigs.k8s.io/kustomize/api/internal/crawl/index"
-
-	"github.com/gomodule/redigo/redis"
-)
-
-const (
-	githubAccessTokenVar = "GITHUB_ACCESS_TOKEN"
-	redisCacheURL        = "REDIS_CACHE_URL"
-	redisKeyURL          = "REDIS_KEY_URL"
-	retryCount           = 3
-)
-
-type CrawlMode int
-
-const (
-	CrawlUnknown CrawlMode = iota
-	// Crawl all the kustomization files in all the repositories of a Github user
-	CrawlUser
-	// Crawl all the kustomization files in a Github repo
-	CrawlRepo
-	// Crawl all the documents in the index
-	CrawlIndex
-	// Crawl all the kustomization files on Github
-	CrawlGithub
-	// Crawl all the documents in the index and crawling all the kustomization files on Github
-	CrawlIndexAndGithub
-)
-
-func NewCrawlMode(s string) CrawlMode {
-	switch s {
-	case "github-user":
-		return CrawlUser
-	case "github-repo":
-		return CrawlRepo
-	case "index+github":
-		return CrawlIndexAndGithub
-	case "index":
-		return CrawlIndex
-	case "github":
-		return CrawlGithub
-	default:
-		return CrawlUnknown
-	}
-}
-
-func main() {
-	indexNamePtr := flag.String(
-		"index", "kustomize", "The name of the ElasticSearch index.")
-	modePtr := flag.String("mode", "index+github",
-		`The crawling mode, which can be one of [github-user, github-repo, index, github, index+github].
-  * github-user: crawl all the kustomization files in all the repositories of a Github user (--github-user must be specified for this mode).
-  * github-repo: crawl all the kustomization files in a Github repository (--github-repo must be specified for this mode).
-  * index: crawl all the documents in the index.
-  * gihub: crawl all the kustomization files on Github.
-  * index+github: crawl all the documents in the index and crawling all the kustomization files on Github.`)
-	githubUserPtr := flag.String("github-user", "",
-		"A github user name (e.g., kubernetes-sigs). This flag is required for the `github-user` mode.")
-	githubRepoPtr := flag.String("github-repo", "",
-		"A github repository name (e.g., kubernetes-sigs/kustomize). This flag is required for the `github-repo` mode.")
-	flag.Parse()
-
-	githubToken := os.Getenv(githubAccessTokenVar)
-	if githubToken == "" {
-		log.Printf("Must set the variable '%s' to make github requests.\n",
-			githubAccessTokenVar)
-		return
-	}
-
-	ctx := context.Background()
-	idx, err := index.NewKustomizeIndex(ctx, *indexNamePtr)
-	if err != nil {
-		log.Printf("Could not create an index: %v\n", err)
-		return
-	}
-
-	cacheURL := os.Getenv(redisCacheURL)
-	cache, err := redis.DialURL(cacheURL)
-	clientCache := &http.Client{}
-	if err != nil {
-		log.Printf("Error: redis could not make a connection: %v\n", err)
-	} else {
-		clientCache = httpclient.NewClient(cache)
-	}
-
-	// docConverter takes in a plain document and processes it for the index.
-	docConverter := func(d *doc.Document) (crawler.CrawledDocument, error) {
-		kdoc := doc.KustomizationDocument{
-			Document: *d,
-		}
-
-		err := kdoc.ParseYAML()
-		return &kdoc, err
-	}
-
-	// Index updates the value in the index.
-	indexFunc := func(cdoc crawler.CrawledDocument, mode index.Mode) error {
-		switch d := cdoc.(type) {
-		case *doc.KustomizationDocument:
-			switch mode {
-			case index.Delete:
-				log.Printf("Deleting: %v", d)
-				return idx.Delete(d.ID())
-			default:
-				log.Printf("Inserting: %v", d)
-				return idx.Put(d.ID(), d)
-			}
-		default:
-			return fmt.Errorf("type %T not supported", d)
-		}
-	}
-
-	// seen tracks the IDs of all the documents in the index and their corresponding file types.
-	// This helps avoid indexing a given document multiple times.
-	seen := utils.NewSeenMap()
-
-	mode := NewCrawlMode(*modePtr)
-
-	ghCrawlerConstructor := func(user, repo string) crawler.Crawler {
-		if user != "" {
-			return github.NewCrawler(githubToken, retryCount, clientCache,
-				github.QueryWith(
-					github.Filename("kustomization.yaml"),
-					github.Filename("kustomization.yml"),
-					github.Filename("kustomization"),
-					github.User(user)),
-			)
-		} else if repo != "" {
-			return github.NewCrawler(githubToken, retryCount, clientCache,
-				github.QueryWith(
-					github.Filename("kustomization.yaml"),
-					github.Filename("kustomization.yml"),
-					github.Filename("kustomization"),
-					github.Repo(repo)),
-			)
-		} else {
-			return github.NewCrawler(githubToken, retryCount, clientCache,
-				github.QueryWith(
-					github.Filename("kustomization.yaml"),
-					github.Filename("kustomization.yml"),
-					github.Filename("kustomization")),
-			)
-		}
-	}
-
-	query := []byte(`{ "query":{ "match_all":{} } }`)
-	it := idx.IterateQuery(query, 10000, 60*time.Second)
-
-	switch mode {
-	case CrawlIndexAndGithub:
-		crawlers := []crawler.Crawler{ghCrawlerConstructor("", "")}
-		crawler.CrawlFromSeedIterator(ctx, it, crawlers, docConverter, indexFunc, seen)
-		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
-	case CrawlIndex:
-		crawlers := []crawler.Crawler{ghCrawlerConstructor("", "")}
-		crawler.CrawlFromSeedIterator(ctx, it, crawlers, docConverter, indexFunc, seen)
-	case CrawlGithub:
-		crawlers := []crawler.Crawler{ghCrawlerConstructor("", "")}
-		// add all the documents in the index into seen.
-		// this greatly reduces the time overhead of CrawlGithub.
-		for it.Next() {
-			for _, hit := range it.Value().Hits.Hits {
-				d := hit.Document.Document
-				seen.Set(d.ID(), d.FileType)
-			}
-		}
-		if err := it.Err(); err != nil {
-			log.Fatalf("Error iterating the index: %v\n", err)
-		}
-
-		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
-	case CrawlUser:
-		if *githubUserPtr == "" {
-			flag.Usage()
-			log.Fatalf("Please specify a github user with the github-user flag!")
-		}
-		crawlers := []crawler.Crawler{ghCrawlerConstructor(*githubUserPtr, "")}
-		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
-	case CrawlRepo:
-		if *githubRepoPtr == "" {
-			flag.Usage()
-			log.Fatalf("Please specify a github repository with the github-repo flag!")
-		}
-		crawlers := []crawler.Crawler{ghCrawlerConstructor("", *githubRepoPtr)}
-		crawler.CrawlGithub(ctx, crawlers, docConverter, indexFunc, seen)
-	case CrawlUnknown:
-		flag.Usage()
-		log.Fatalf("The --mode flag must be one of [github-user, github-repo, index, github, index+github].")
-	}
-}
--- a/api/internal/crawl/cmd/kustomize_stats/Dockerfile
+++ b/api/internal/crawl/cmd/kustomize_stats/Dockerfile
@@ -1,14 +0,0 @@
-FROM golang:1.11 AS build
-
-ARG GO111MODULE=on
-
-WORKDIR /go/src/sigs.k8s.io/kustomize/api/internal/crawl
-COPY . /go/src/sigs.k8s.io/kustomize/api/internal/crawl
-
-RUN go mod download
-RUN CGO_ENABLED=0 go install ./cmd/kustomize_stats
-
-FROM scratch
-COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=build /go/bin/kustomize_stats /
-ENTRYPOINT ["/kustomize_stats"]
--- a/api/internal/crawl/cmd/kustomize_stats/main.go
+++ b/api/internal/crawl/cmd/kustomize_stats/main.go
@@ -1,249 +0,0 @@
-package main
-
-import (
-	"context"
-	"crypto/sha256"
-	"flag"
-	"fmt"
-	"log"
-	"sort"
-	"time"
-
-	"sigs.k8s.io/kustomize/api/internal/crawl/doc"
-
-	"sigs.k8s.io/kustomize/api/internal/crawl/index"
-)
-
-// iterateArr adds each item in arr into countMap.
-func iterateArr(arr []string, countMap map[string]int) {
-	for _, item := range arr {
-		if _, ok := countMap[item]; !ok {
-			countMap[item] = 1
-		} else {
-			countMap[item]++
-		}
-	}
-
-}
-
-// SortMapKeyByValueInt takes a map as its input, sorts its keys according to their values
-// in the map, and outputs the sorted keys as a slice.
-func SortMapKeyByValueInt(m map[string]int) []string {
-	keys := make([]string, 0, len(m))
-	for key := range m {
-		keys = append(keys, key)
-	}
-	// sort keys according to their values in the map m
-	sort.Slice(keys, func(i, j int) bool { return m[keys[i]] > m[keys[j]] })
-	return keys
-}
-
-// SortMapKeyByValue takes a map as its input, sorts its keys according to their values
-// in the map, and outputs the sorted keys as a slice.
-func SortMapKeyByValueLen(m map[string][]string) []string {
-	keys := make([]string, 0, len(m))
-	for key := range m {
-		keys = append(keys, key)
-	}
-	// sort keys according to their values in the map m
-	sort.Slice(keys, func(i, j int) bool { return len(m[keys[i]]) > len(m[keys[j]]) })
-	return keys
-}
-
-func GeneratorOrTransformerStats(docs []*doc.KustomizationDocument) {
-	n := len(docs)
-	if n == 0 {
-		return
-	}
-
-	fileType := docs[0].FileType
-	fmt.Printf("There are totally %d %s files.\n", n, fileType)
-
-	GitRepositorySummary(docs, fileType)
-
-	// key of kindToUrls: a string in the KustomizationDocument.Kinds field
-	// value of kindToUrls: a slice of string urls defining a given kind.
-	kindToUrls := make(map[string][]string)
-
-	for _, d := range docs {
-		url := fmt.Sprintf("%s/blob/%s/%s", d.RepositoryURL, d.DefaultBranch, d.FilePath)
-		for _, kind := range d.Kinds {
-			if _, ok := kindToUrls[kind]; !ok {
-				kindToUrls[kind] = []string{url}
-			} else {
-				kindToUrls[kind] = append(kindToUrls[kind], url)
-			}
-		}
-	}
-	fmt.Printf("There are totally %d kinds of %s\n", len(kindToUrls), fileType)
-	sortedKeys := SortMapKeyByValueLen(kindToUrls)
-	for _, k := range sortedKeys {
-		sort.Strings(kindToUrls[k])
-		fmt.Printf("%s kind %s appears %d times\n", fileType, k, len(kindToUrls[k]))
-		for _, url := range kindToUrls[k] {
-			fmt.Printf("%s\n", url)
-		}
-	}
-}
-
-// GitRepositorySummary counts the distribution of docs:
-// 1) how many git repositories are these docs from?
-// 2) how many docs are from each git repository?
-func GitRepositorySummary(docs []*doc.KustomizationDocument, fileType string) {
-	m := make(map[string]int)
-	for _, d := range docs {
-		if _, ok := m[d.RepositoryURL]; ok {
-			m[d.RepositoryURL]++
-		} else {
-			m[d.RepositoryURL] = 1
-		}
-	}
-	sortedKeys := SortMapKeyByValueInt(m)
-	topN := 10
-	i := 0
-	for _, k := range sortedKeys {
-		if i >= topN {
-			break
-		}
-		fmt.Printf("%d %s are from %s\n", m[k], fileType, k)
-		i++
-	}
-}
-
-func main() {
-	topKindsPtr := flag.Int(
-		"kinds", -1,
-		`the number of kubernetes object kinds to be listed according to their popularities.
-By default, all the kinds will be listed.
-If you only want to list the 10 most popular kinds, set the flag to 10.`)
-	topIdentifiersPtr := flag.Int(
-		"identifiers", -1,
-		`the number of identifiers to be listed according to their popularities.
-By default, all the identifiers will be listed.
-If you only want to list the 10 most popular identifiers, set the flag to 10.`)
-	topKustomizeFeaturesPtr := flag.Int(
-		"kustomize-features", -1,
-		`the number of kustomize features to be listed according to their popularities.
-By default, all the features will be listed.
-If you only want to list the 10 most popular features, set the flag to 10.`)
-	indexNamePtr := flag.String(
-		"index", "kustomize", "The name of the ElasticSearch index.")
-	flag.Parse()
-
-	ctx := context.Background()
-	idx, err := index.NewKustomizeIndex(ctx, *indexNamePtr)
-	if err != nil {
-		log.Fatalf("Could not create an index: %v\n", err)
-	}
-
-	// count tracks the number of documents in the index
-	count := 0
-
-	// kustomizationFilecount tracks the number of kustomization files in the index
-	kustomizationFilecount := 0
-
-	kindsMap := make(map[string]int)
-	identifiersMap := make(map[string]int)
-	kustomizeIdentifiersMap := make(map[string]int)
-
-	// ids tracks the unique IDs of the documents in the index
-	ids := make(map[string]struct{})
-
-	// generatorFiles include all the non-kustomization files whose FileType is generator
-	generatorFiles := make([]*doc.KustomizationDocument, 0)
-
-	// transformersFiles include all the non-kustomization files whose FileType is transformer
-	transformersFiles := make([]*doc.KustomizationDocument, 0)
-
-	checksums := make(map[string]int)
-
-	// get all the documents in the index
-	query := []byte(`{ "query":{ "match_all":{} } }`)
-	it := idx.IterateQuery(query, 10000, 60*time.Second)
-	for it.Next() {
-		for _, hit := range it.Value().Hits.Hits {
-			sum := fmt.Sprintf("%x", sha256.Sum256([]byte(hit.Document.DocumentData)))
-			if _, ok := checksums[sum]; ok {
-				checksums[sum]++
-			} else {
-				checksums[sum] = 1
-			}
-
-			// check whether there is any duplicate IDs in the index
-			if _, ok := ids[hit.ID]; !ok {
-				ids[hit.ID] = struct{}{}
-			} else {
-				log.Printf("Found duplicate ID (%s)\n", hit.ID)
-			}
-
-			count++
-			iterateArr(hit.Document.Kinds, kindsMap)
-			iterateArr(hit.Document.Identifiers, identifiersMap)
-
-			if doc.IsKustomizationFile(hit.Document.FilePath) {
-				kustomizationFilecount++
-				iterateArr(hit.Document.Identifiers, kustomizeIdentifiersMap)
-
-			} else {
-				switch hit.Document.FileType {
-				case "generator":
-					generatorFiles = append(generatorFiles, hit.Document.Copy())
-				case "transformer":
-					transformersFiles = append(transformersFiles, hit.Document.Copy())
-				}
-			}
-		}
-	}
-
-	if err := it.Err(); err != nil {
-		log.Fatalf("Error iterating: %v\n", err)
-	}
-
-	sortedKindsMapKeys := SortMapKeyByValueInt(kindsMap)
-	sortedIdentifiersMapKeys := SortMapKeyByValueInt(identifiersMap)
-	sortedKustomizeIdentifiersMapKeys := SortMapKeyByValueInt(kustomizeIdentifiersMap)
-
-	fmt.Printf(`The count of unique document IDs in the kustomize index: %d
-There are %d documents in the kustomize index.
-%d kinds of kubernetes objects are customized:`, len(ids), count, len(kindsMap))
-	fmt.Printf("\n")
-
-	kindCount := 0
-	for _, key := range sortedKindsMapKeys {
-		if *topKindsPtr < 0 || (*topKindsPtr >= 0 && kindCount < *topKindsPtr) {
-			fmt.Printf("\tkind `%s` is customimzed in %d documents\n", key, kindsMap[key])
-			kindCount++
-		}
-	}
-
-	fmt.Printf("%d kinds of identifiers are found:\n", len(identifiersMap))
-	identifierCount := 0
-	for _, key := range sortedIdentifiersMapKeys {
-		if *topIdentifiersPtr < 0 || (*topIdentifiersPtr >= 0 && identifierCount < *topIdentifiersPtr) {
-			fmt.Printf("\tidentifier `%s` appears in %d documents\n", key, identifiersMap[key])
-			identifierCount++
-		}
-	}
-
-	fmt.Printf(`There are %d kustomization files in the kustomize index.
-%d kinds of kustomize features are found:`, kustomizationFilecount, len(kustomizeIdentifiersMap))
-	fmt.Printf("\n")
-	kustomizeFeatureCount := 0
-	for _, key := range sortedKustomizeIdentifiersMapKeys {
-		if *topKustomizeFeaturesPtr < 0 || (*topKustomizeFeaturesPtr >= 0 && kustomizeFeatureCount < *topKustomizeFeaturesPtr) {
-			fmt.Printf("\tfeature `%s` is used in %d documents\n", key, kustomizeIdentifiersMap[key])
-			kustomizeFeatureCount++
-		}
-	}
-
-	GeneratorOrTransformerStats(generatorFiles)
-	GeneratorOrTransformerStats(transformersFiles)
-
-	fmt.Printf("There are total %d checksums of document contents\n", len(checksums))
-	sortedChecksums := SortMapKeyByValueInt(checksums)
-	sortedChecksums = sortedChecksums[:20]
-	fmt.Printf("The top 20 checksums are:\n")
-	for _, key := range sortedChecksums {
-		fmt.Printf("checksum %s apprears %d\n", key, checksums[key])
-	}
-}
--- a/Show More
+++ b/Show More