Merge pull request #3859 from monopole/pinToCmdConfig

Pin to cmd/config v0.9.11

.dockerignore

@@ -0,0 +1,8 @@
+.github
+docs
+examples
+functions
+hack
+site
+travis
+*.md

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,68 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ""
+labels:
+  - kind/bug
+assignees: ""
+---
+
+<!--
+Please read this page: https://kubernetes-sigs.github.io/kustomize/contributing/bugs/ before
+filing a bug
+-->
+
+<!-- Feel free to skip the sections if they are not applicable. -->
+
+**Describe the bug**
+
+<!-- A clear and concise description of what the bug is. -->
+
+**Files that can reproduce the issue**
+
+<!--
+We cannot figure out or fix the issue if we don't know how to reproduce. Please
+provide a minimum set of files that can reproduce the issue. You can paste the
+file contents here or provide a link to a tarball or git repo.
+
+Example:
+
+kustomization.yaml
+
+```
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+...
+```
+
+resources.yaml
+
+```
+apiVersion: v1
+kind: Deployment
+...
+```
+
+...
+-->
+
+**Expected output**
+
+<!-- What's the expected output? -->
+
+**Actual output**
+
+<!-- What's the actual output? -->
+
+**Kustomize version**
+
+<!-- Please use the latest version when it's possible. -->
+
+**Platform**
+
+<!-- Linux/macOS/Windows? -->
+
+**Additional context**
+
+<!-- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/config.yaml

@@ -0,0 +1 @@
+blank_issues_enabled: true

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,26 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ""
+labels:
+  - kind/feature
+assignees: ""
+---
+
+<!-- Feel free to skip the sections if they are not applicable. -->
+
+**Is your feature request related to a problem? Please describe.**
+
+<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
+
+**Describe the solution you'd like**
+
+<!-- A clear and concise description of what you want to happen. -->
+
+**Describe alternatives you've considered**
+
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+**Additional context**
+
+<!-- Add any other context or screenshots about the feature request here. -->

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,9 @@
+---
+name: Question
+about: Ask a question about the kustomize
+title: "[Question]"
+labels: ""
+assignees: ""
+---
+
+<!-- Please describe your question here -->

.github/workflows/go.yml

@@ -0,0 +1,100 @@
+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: ./scripts/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

.gitignore

@@ -19,3 +19,5 @@
 
 # macOS
 *.DS_store
+
+.bin

.golangci-kustomize.yml

@@ -0,0 +1,50 @@
+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

.golangci.yml

@@ -1,30 +0,0 @@
-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

.travis.yml

@@ -1,43 +0,0 @@
-os:
-  - linux
-  - osx
-# TODO: Speed up the slowness of the osx travis runs
-# Maybe cache brew installs?
-#
-# TODO: Uncomment when some gets the 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:
-  - "1.13"
-
-go_import_path: sigs.k8s.io/kustomize
-
-before_install:
-  - source ./travis/consider-early-travis-exit.sh
-
-# Skip the install process; let pre-commit.sh do it.
-install: true
-
-script:
-  - ./travis/verify-deps.sh
-  - ./travis/pre-commit.sh
-  - ./travis/kyaml-pre-commit.sh
-
-# TBD. Suppressing for now.
-notifications:
-  email: false

CONTRIBUTING.md

@@ -14,7 +14,7 @@ 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.md) - Common resources for existing developers
+- [Contributor Cheat Sheet](https://git.k8s.io/community/contributors/guide/contributor-cheatsheet/README.md) - Common resources for existing developers
 
 ## Mentorship
 

Makefile

@@ -1,79 +1,370 @@
-# This Makefile is (and must be) used by
-# travis/pre-commit.sh to qualify pull requests.
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
 #
-# That script generates all the code that needs
-# to be generated, and runs all the tests.
-#
-# Functionality in that script, expressed in bash, is
-# gradually being moved here.
+# Makefile for kustomize CLI and API.
 
-MYGOBIN := $(shell go env GOPATH)/bin
+SHELL := /usr/bin/env bash
+MYGOBIN = $(shell go env GOBIN)
+ifeq ($(MYGOBIN),)
+MYGOBIN = $(shell go env GOPATH)/bin
+endif
+export PATH := $(MYGOBIN):$(PATH)
+MODULES := '"cmd/config" "api/" "kustomize/" "kyaml/"'
+
+# Provide defaults for REPO_OWNER and REPO_NAME if not present.
+# Typically these values would be provided by Prow.
+ifndef REPO_OWNER
+REPO_OWNER := "kubernetes-sigs"
+endif
+
+ifndef REPO_NAME
+REPO_NAME := "kustomize"
+endif
 
 .PHONY: all
-all:
-	./travis/pre-commit.sh
+all: verify-kustomize
 
-$(MYGOBIN)/golangci-lint:
-	cd api; go install github.com/golangci/golangci-lint/cmd/golangci-lint
+.PHONY: verify-kustomize
+verify-kustomize: \
+	lint-kustomize \
+	test-unit-kustomize-all \
+	test-examples-kustomize-against-HEAD \
+	test-examples-kustomize-against-4.0
 
+# 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-multi-module \
+	test-unit-kustomize-all \
+	test-unit-cmd-all \
+	test-go-mod \
+	test-examples-kustomize-against-HEAD \
+	test-examples-kustomize-against-4.0
+
+.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; \
+	)
+
+# Install from version specified in api/go.mod.
 $(MYGOBIN)/mdrip:
-	cd api; go install github.com/monopole/mdrip
-
-# TODO: need a new release of the API, followed by a new pluginator.
-# pluginator v1.1.0 is too old for the code currently needed in the API.
-# Can release a new one at any time, just haven't done so.
-# When one has been released,
-#  - uncomment the pluginator line in './api/internal/tools/tools.go'
-#  - pin the version tag in './api/go.mod' to match the new release
-#  - change the following to 'cd api; go install sigs.k8s.io/kustomize/pluginator'
-$(MYGOBIN)/pluginator:
-	cd pluginator; go install .
+	cd api; \
+	go install github.com/monopole/mdrip
 
+# Install from version specified in api/go.mod.
 $(MYGOBIN)/stringer:
-	cd api; go install golang.org/x/tools/cmd/stringer
+	cd api; \
+	go install golang.org/x/tools/cmd/stringer
 
-# Specific version tags for these utilities are pinned in ./api/go.mod
-# which seems to be as good a place as any to do so.
-# That's the reason for all the occurances of 'cd api;' in the
-# dependencies; 'go install' uses the local 'go.mod' to get the version.
-install-tools: $(MYGOBIN)/golangci-lint \
+# Install from version specified in api/go.mod.
+$(MYGOBIN)/goimports:
+	cd api; \
+	go install golang.org/x/tools/cmd/goimports
+
+# Build from local source.
+$(MYGOBIN)/gorepomod:
+	cd cmd/gorepomod; \
+	go install .
+
+# Build from local source.
+$(MYGOBIN)/k8scopy:
+	cd cmd/k8scopy; \
+	go install .
+
+# Build from local source.
+$(MYGOBIN)/pluginator:
+	cd cmd/pluginator; \
+	go install .
+
+# Build from local source.
+$(MYGOBIN)/prchecker:
+	cd cmd/prchecker; \
+	go install .
+
+# Build from local source.
+$(MYGOBIN)/kustomize: build-kustomize-api
+	cd kustomize; \
+	go install .
+
+.PHONY: install-tools
+install-tools: \
+	$(MYGOBIN)/goimports \
+	$(MYGOBIN)/golangci-lint-kustomize \
+	$(MYGOBIN)/gorepomod \
+	$(MYGOBIN)/helmV3 \
+	$(MYGOBIN)/k8scopy \
 	$(MYGOBIN)/mdrip \
 	$(MYGOBIN)/pluginator \
+	$(MYGOBIN)/prchecker \
 	$(MYGOBIN)/stringer
 
-.PHONY: lint
-lint: install-tools
-	cd api; $(MYGOBIN)/golangci-lint run ./...
-	cd kustomize; $(MYGOBIN)/golangci-lint run ./...
-	cd pluginator; $(MYGOBIN)/golangci-lint run ./...
+### 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).
 
-.PHONY: unit-test-api
-unit-test-api:
-	cd api; go test ./...
+# Where all generated builtin plugin code should go.
+pGen=api/builtins
+# Where the builtin Go plugin modules live.
+pSrc=plugin/builtin
 
-.PHONY: unit-test-plugins
-unit-test-plugins:
-	./hack/runPluginUnitTests.sh
+_builtinplugins = \
+	AnnotationsTransformer.go \
+	ConfigMapGenerator.go \
+	HashTransformer.go \
+	ImageTagTransformer.go \
+	LabelTransformer.go \
+	LegacyOrderTransformer.go \
+	NamespaceTransformer.go \
+	PatchJson6902Transformer.go \
+	PatchStrategicMergeTransformer.go \
+	PatchTransformer.go \
+	PrefixSuffixTransformer.go \
+	ReplacementTransformer.go \
+	ReplicaCountTransformer.go \
+	SecretGenerator.go \
+	ValueAddTransformer.go \
+	HelmChartInflationGenerator.go
 
-.PHONY: unit-test-kustomize
-unit-test-kustomize:
+# 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)/ReplacementTransformer.go: $(pSrc)/replacementtransformer/ReplacementTransformer.go
+$(pGen)/ReplicaCountTransformer.go: $(pSrc)/replicacounttransformer/ReplicaCountTransformer.go
+$(pGen)/SecretGenerator.go: $(pSrc)/secretgenerator/SecretGenerator.go
+$(pGen)/ValueAddTransformer.go: $(pSrc)/valueaddtransformer/ValueAddTransformer.go
+$(pGen)/HelmChartInflationGenerator.go: $(pSrc)/helmchartinflationgenerator/HelmChartInflationGenerator.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: build-kustomize-external-go-plugin
+build-kustomize-external-go-plugin:
+	./hack/buildExternalGoPlugins.sh ./plugin
+
+.PHONY: clean-kustomize-external-go-plugin
+clean-kustomize-external-go-plugin:
+	./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 cmd/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: generate-kustomize-api
+generate-kustomize-api: $(MYGOBIN)/k8scopy
+	cd api; go generate ./...
+
+.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: unit-test-all
-unit-test-all: unit-test-api unit-test-kustomize unit-test-plugins
+.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:
+	./scripts/kyaml-pre-commit.sh
+
+test-go-mod:
+	./scripts/check-go-mod.sh
+
+# Environment variables are defined at
+# https://github.com/kubernetes/test-infra/blob/master/prow/jobs.md#job-environment-variables
+.PHONY: test-multi-module
+test-multi-module: $(MYGOBIN)/prchecker
+	( \
+		export MYGOBIN=$(MYGOBIN); \
+		export REPO_OWNER=$(REPO_OWNER); \
+		export REPO_NAME=$(REPO_NAME); \
+		export PULL_NUMBER=$(PULL_NUMBER); \
+		export MODULES=$(MODULES); \
+		./scripts/check-multi-module.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-4.0: $(MYGOBIN)/mdrip
+	./hack/testExamplesAgainstKustomize.sh v4@v4.0.5
 
 # 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.
 $(MYGOBIN)/kubeval:
-	d=$(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
+	( \
+		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.
-$(MYGOBIN)/helm:
-	d=$(shell mktemp -d); cd $$d; \
-	wget https://storage.googleapis.com/kubernetes-helm/helm-v2.13.1-linux-amd64.tar.gz; \
-	tar -xvzf helm-v2.13.1-linux-amd64.tar.gz; \
-	mv linux-amd64/helm $(MYGOBIN); \
-	rm -rf $$d
+# 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 $$d; \
+		tgzFile=helm-v3.5.3-linux-amd64.tar.gz; \
+		wget https://get.helm.sh/$$tgzFile; \
+		tar -xvzf $$tgzFile; \
+		mv linux-amd64/helm $(MYGOBIN)/helmV3; \
+		rm -rf $$d \
+	)
+
+$(MYGOBIN)/kind:
+	( \
+        set -e; \
+        d=$(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; \
+	)
+
+# linux only.
+$(MYGOBIN)/gh:
+	( \
+		set -e; \
+		d=$(shell mktemp -d); cd $$d; \
+		tgzFile=gh_1.0.0_linux_amd64.tar.gz; \
+		wget https://github.com/cli/cli/releases/download/v1.0.0/$$tgzFile; \
+		tar -xvzf $$tgzFile; \
+		mv gh_1.0.0_linux_amd64/bin/gh  $(MYGOBIN)/gh; \
+		rm -rf $$d \
+	)
+
+.PHONY: clean
+clean: clean-kustomize-external-go-plugin
+	go clean --cache
+	rm -f $(builtinplugins)
+	rm -f $(MYGOBIN)/kustomize
+	rm -f $(MYGOBIN)/golangci-lint-kustomize
+
+# Handle pluginator manually.
+# rm -f $(MYGOBIN)/pluginator
+
+# Nuke the site from orbit.  It's the only way to be sure.
+.PHONY: nuke
+nuke: clean
+	go clean --modcache

OWNERS_ALIASES

@@ -5,7 +5,13 @@ aliases:
   kustomize-maintainers:
     - droot
     - justinsb
-    - liujingfang1
-    - mengqiy
+    - knverey
     - monopole
+    - mortent
+    - natasha41575
+    - phanimarupaka
     - pwittrock
+    - Shell32-Natsu
+# emeritus
+#    - liujingfang1
+#    - mengqiy

README.md

@@ -9,30 +9,31 @@ patch [kubernetes style] API objects.  It's like
 [`make`], in that what it does is declared in a file,
 and it's like [`sed`], in that it emits edited text.
 
-This tool is sponsored by [sig-cli] ([KEP]), and
-inspired by [DAM].
+This tool is sponsored by [sig-cli] ([KEP]).
 
+ - [Installation instructions](https://kubernetes-sigs.github.io/kustomize/installation)
+ - [General documentation](https://kubernetes-sigs.github.io/kustomize)
+ - [Examples](examples)
 
-[![Build Status](https://travis-ci.org/kubernetes-sigs/kustomize.svg?branch=master)](https://travis-ci.org/kubernetes-sigs/kustomize)
+[![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)
 [![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](docs/INSTALL.md).
-
-Browse the [docs](docs) or jump right into the
-tested [examples](examples).
-
 ## kubectl integration
 
-Since [v1.14][kubectl announcement] the kustomize build system has been included in kubectl.
+The kustomize build flow at [v2.0.3] was added
+to [kubectl v1.14][kubectl announcement].  The kustomize
+flow in kubectl has remained frozen at v2.0.3 while work
+to extract kubectl from the k/k repo, and work to remove
+kustomize's dependence on core k/k code ([#2506]) has proceeded.
+The reintegration effort is tracked in [#1500] (and its blocking
+issues).
 
-| kubectl version | kustomize version |
-|---------|--------|
-| v1.16.0 | [v2.0.3](https://github.com/kubernetes-sigs/kustomize/tree/v2.0.3) |
-| v1.15.x | [v2.0.3](https://github.com/kubernetes-sigs/kustomize/tree/v2.0.3) |
-| v1.14.x | [v2.0.3](https://github.com/kubernetes-sigs/kustomize/tree/v2.0.3) |
+[v2.0.3]: /../../tree/v2.0.3
+[#2506]: https://github.com/kubernetes-sigs/kustomize/issues/2506
+[#1500]: https://github.com/kubernetes-sigs/kustomize/issues/1500
 
-For examples and guides for using the kubectl integration please see the [kubectl book] or the [kubernetes documentation].
+For examples and guides for using the kubectl integration please
+see the [kubectl book] or the [kubernetes documentation].
 
 ## Usage
 
@@ -107,7 +108,7 @@ 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, refering to
+An overlay is just another kustomization, referring to
 the base, and referring to patches to apply to that
 base.
 
@@ -133,20 +134,8 @@ The YAML can be directly [applied] to a cluster:
 
 ## Community
 
-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]
+- [file a bug](https://kubernetes-sigs.github.io/kustomize/contributing/bugs/) instructions
+- [contribute a feature](https://kubernetes-sigs.github.io/kustomize/contributing/features/) instructions
 
 ### Code of conduct
 
@@ -155,32 +144,27 @@ is governed by the [Kubernetes Code of Conduct].
 
 [`make`]: https://www.gnu.org/software/make
 [`sed`]: https://www.gnu.org/software/sed
-[DAM]: docs/glossary.md#declarative-application-management
+[DAM]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#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
-[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
+[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
 [imageBase]: docs/images/base.jpg
 [imageOverlay]: docs/images/overlay.jpg
-[kind/feature]: https://github.com/kubernetes-sigs/kustomize/labels/kind%2Ffeature
 [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
+[kubectl book]: https://kubectl.docs.kubernetes.io/guides/introduction/kustomize/
 [kubernetes documentation]: https://kubernetes.io/docs/tasks/manage-kubernetes-objects/kustomization/
-[kubernetes style]: docs/glossary.md#kubernetes-style-object
-[kustomization]: docs/glossary.md#kustomization
-[overlay]: docs/glossary.md#overlay
-[overlays]: docs/glossary.md#overlay
+[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
 [release page]: https://github.com/kubernetes-sigs/kustomize/releases
-[resource]: docs/glossary.md#resource
-[resources]: docs/glossary.md#resource
+[resource]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#resource
+[resources]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#resource
 [sig-cli]: https://github.com/kubernetes/community/blob/master/sig-cli/README.md
-[variant]: docs/glossary.md#variant
-[variants]: docs/glossary.md#variant
+[variant]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#variant
+[variants]: https://kubernetes-sigs.github.io/kustomize/api-reference/glossary#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]: docs/workflows.md
+[workflows]: https://kubernetes-sigs.github.io/kustomize/guides

api/builtins/AnnotationsTransformer.go

@@ -0,0 +1,44 @@
+// 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/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 {
+	if len(p.Annotations) == 0 {
+		return nil
+	}
+	for _, r := range m.Resources() {
+		err := r.ApplyFilter(annotations.Filter{
+			Annotations: p.Annotations,
+			FsSlice:     p.FieldSpecs,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func NewAnnotationsTransformerPlugin() resmap.TransformerPlugin {
+	return &AnnotationsTransformerPlugin{}
+}

api/builtins/ConfigMapGenerator.go

@@ -0,0 +1,39 @@
+// 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{}
+}

api/builtins/HashTransformer.go

@@ -0,0 +1,40 @@
+// 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.KustHasher
+}
+
+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 := res.Hash(p.hasher)
+			if err != nil {
+				return err
+			}
+			res.StorePreviousId()
+			res.SetName(fmt.Sprintf("%s-%s", res.GetName(), h))
+		}
+	}
+	return nil
+}
+
+func NewHashTransformerPlugin() resmap.TransformerPlugin {
+	return &HashTransformerPlugin{}
+}

api/builtins/HelmChartInflationGenerator.go

@@ -0,0 +1,333 @@
+// Code generated by pluginator on HelmChartInflationGenerator; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/imdario/mergo"
+	"github.com/pkg/errors"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+)
+
+// HelmChartInflationGeneratorPlugin is a plugin to generate resources
+// from a remote or local helm chart.
+type HelmChartInflationGeneratorPlugin struct {
+	h *resmap.PluginHelpers
+	types.HelmGlobals
+	types.HelmChart
+	tmpDir string
+}
+
+var KustomizePlugin HelmChartInflationGeneratorPlugin
+
+const (
+	valuesMergeOptionMerge    = "merge"
+	valuesMergeOptionOverride = "override"
+	valuesMergeOptionReplace  = "replace"
+)
+
+var legalMergeOptions = []string{
+	valuesMergeOptionMerge,
+	valuesMergeOptionOverride,
+	valuesMergeOptionReplace,
+}
+
+// Config uses the input plugin configurations `config` to setup the generator
+// options
+func (p *HelmChartInflationGeneratorPlugin) Config(
+	h *resmap.PluginHelpers, config []byte) (err error) {
+	if h.GeneralConfig() == nil {
+		return fmt.Errorf("unable to access general config")
+	}
+	if !h.GeneralConfig().HelmConfig.Enabled {
+		return fmt.Errorf("must specify --enable-helm")
+	}
+	if h.GeneralConfig().HelmConfig.Command == "" {
+		return fmt.Errorf("must specify --helm-command")
+	}
+	p.h = h
+	if err = yaml.Unmarshal(config, p); err != nil {
+		return
+	}
+	return p.validateArgs()
+}
+
+// This uses the real file system since tmpDir may be used
+// by the helm subprocess.  Cannot use a chroot jail or fake
+// filesystem since we allow the user to use previously
+// downloaded charts.  This is safe since this plugin is
+// owned by kustomize.
+func (p *HelmChartInflationGeneratorPlugin) establishTmpDir() (err error) {
+	if p.tmpDir != "" {
+		// already done.
+		return nil
+	}
+	p.tmpDir, err = ioutil.TempDir("", "kustomize-helm-")
+	return err
+}
+
+func (p *HelmChartInflationGeneratorPlugin) validateArgs() (err error) {
+	if p.Name == "" {
+		return fmt.Errorf("chart name cannot be empty")
+	}
+
+	// ChartHome might be consulted by the plugin (to read
+	// values files below it), so it must be located under
+	// the loader root (unless root restrictions are
+	// disabled, in which case this can be an absolute path).
+	if p.ChartHome == "" {
+		p.ChartHome = "charts"
+	}
+
+	// The ValuesFile may be consulted by the plugin, so it must
+	// be under the loader root (unless root restrictions are
+	// disabled).
+	if p.ValuesFile == "" {
+		p.ValuesFile = filepath.Join(p.ChartHome, p.Name, "values.yaml")
+	}
+
+	if err = p.errIfIllegalValuesMerge(); err != nil {
+		return err
+	}
+
+	// ConfigHome is not loaded by the plugin, and can be located anywhere.
+	if p.ConfigHome == "" {
+		if err = p.establishTmpDir(); err != nil {
+			return errors.Wrap(
+				err, "unable to create tmp dir for HELM_CONFIG_HOME")
+		}
+		p.ConfigHome = filepath.Join(p.tmpDir, "helm")
+	}
+	return nil
+}
+
+func (p *HelmChartInflationGeneratorPlugin) errIfIllegalValuesMerge() error {
+	if p.ValuesMerge == "" {
+		// Use the default.
+		p.ValuesMerge = valuesMergeOptionOverride
+		return nil
+	}
+	for _, opt := range legalMergeOptions {
+		if p.ValuesMerge == opt {
+			return nil
+		}
+	}
+	return fmt.Errorf("valuesMerge must be one of %v", legalMergeOptions)
+}
+
+func (p *HelmChartInflationGeneratorPlugin) absChartHome() string {
+	if filepath.IsAbs(p.ChartHome) {
+		return p.ChartHome
+	}
+	return filepath.Join(p.h.Loader().Root(), p.ChartHome)
+}
+
+func (p *HelmChartInflationGeneratorPlugin) runHelmCommand(
+	args []string) ([]byte, error) {
+	stdout := new(bytes.Buffer)
+	stderr := new(bytes.Buffer)
+	cmd := exec.Command(p.h.GeneralConfig().HelmConfig.Command, args...)
+	cmd.Stdout = stdout
+	cmd.Stderr = stderr
+	env := []string{
+		fmt.Sprintf("HELM_CONFIG_HOME=%s", p.ConfigHome),
+		fmt.Sprintf("HELM_CACHE_HOME=%s/.cache", p.ConfigHome),
+		fmt.Sprintf("HELM_DATA_HOME=%s/.data", p.ConfigHome)}
+	cmd.Env = append(os.Environ(), env...)
+	err := cmd.Run()
+	if err != nil {
+		helm := p.h.GeneralConfig().HelmConfig.Command
+		err = errors.Wrap(
+			fmt.Errorf(
+				"unable to run: '%s %s' with env=%s (is '%s' installed?)",
+				helm, strings.Join(args, " "), env, helm),
+			stderr.String(),
+		)
+	}
+	return stdout.Bytes(), err
+}
+
+// createNewMergedValuesFile replaces/merges original values file with ValuesInline.
+func (p *HelmChartInflationGeneratorPlugin) createNewMergedValuesFile() (
+	path string, err error) {
+	if p.ValuesMerge == valuesMergeOptionMerge ||
+		p.ValuesMerge == valuesMergeOptionOverride {
+		if err = p.replaceValuesInline(); err != nil {
+			return "", err
+		}
+	}
+	var b []byte
+	b, err = yaml.Marshal(p.ValuesInline)
+	if err != nil {
+		return "", err
+	}
+	return p.writeValuesBytes(b)
+}
+
+func (p *HelmChartInflationGeneratorPlugin) replaceValuesInline() error {
+	pValues, err := p.h.Loader().Load(p.ValuesFile)
+	if err != nil {
+		return err
+	}
+	chValues := make(map[string]interface{})
+	if err = yaml.Unmarshal(pValues, &chValues); err != nil {
+		return err
+	}
+	switch p.ValuesMerge {
+	case valuesMergeOptionOverride:
+		err = mergo.Merge(
+			&chValues, p.ValuesInline, mergo.WithOverride)
+	case valuesMergeOptionMerge:
+		err = mergo.Merge(&chValues, p.ValuesInline)
+	}
+	p.ValuesInline = chValues
+	return err
+}
+
+// copyValuesFile to avoid branching.  TODO: get rid of this.
+func (p *HelmChartInflationGeneratorPlugin) copyValuesFile() (string, error) {
+	b, err := p.h.Loader().Load(p.ValuesFile)
+	if err != nil {
+		return "", err
+	}
+	return p.writeValuesBytes(b)
+}
+
+// Write a absolute path file in the tmp file system.
+func (p *HelmChartInflationGeneratorPlugin) writeValuesBytes(
+	b []byte) (string, error) {
+	if err := p.establishTmpDir(); err != nil {
+		return "", fmt.Errorf("cannot create tmp dir to write helm values")
+	}
+	path := filepath.Join(p.tmpDir, p.Name+"-kustomize-values.yaml")
+	return path, ioutil.WriteFile(path, b, 0644)
+}
+
+func (p *HelmChartInflationGeneratorPlugin) cleanup() {
+	if p.tmpDir != "" {
+		os.RemoveAll(p.tmpDir)
+	}
+}
+
+// Generate implements generator
+func (p *HelmChartInflationGeneratorPlugin) Generate() (rm resmap.ResMap, err error) {
+	defer p.cleanup()
+	if err = p.checkHelmVersion(); err != nil {
+		return nil, err
+	}
+	if path, exists := p.chartExistsLocally(); !exists {
+		if p.Repo == "" {
+			return nil, fmt.Errorf(
+				"no repo specified for pull, no chart found at '%s'", path)
+		}
+		if _, err := p.runHelmCommand(p.pullCommand()); err != nil {
+			return nil, err
+		}
+	}
+	if len(p.ValuesInline) > 0 {
+		p.ValuesFile, err = p.createNewMergedValuesFile()
+	} else {
+		p.ValuesFile, err = p.copyValuesFile()
+	}
+	if err != nil {
+		return nil, err
+	}
+	var stdout []byte
+	stdout, err = p.runHelmCommand(p.templateCommand())
+	if err != nil {
+		return nil, err
+	}
+
+	rm, err = p.h.ResmapFactory().NewResMapFromBytes(stdout)
+	if err == nil {
+		return rm, nil
+	}
+	// try to remove the contents before first "---" because
+	// helm may produce messages to stdout before it
+	stdoutStr := string(stdout)
+	if idx := strings.Index(stdoutStr, "---"); idx != -1 {
+		return p.h.ResmapFactory().NewResMapFromBytes([]byte(stdoutStr[idx:]))
+	}
+	return nil, err
+}
+
+func (p *HelmChartInflationGeneratorPlugin) templateCommand() []string {
+	args := []string{"template"}
+	if p.ReleaseName != "" {
+		args = append(args, p.ReleaseName)
+	}
+	args = append(args, filepath.Join(p.absChartHome(), p.Name))
+	if p.ValuesFile != "" {
+		args = append(args, "--values", p.ValuesFile)
+	}
+	if p.ReleaseName == "" {
+		// AFAICT, this doesn't work as intended due to a bug in helm.
+		// See https://github.com/helm/helm/issues/6019
+		// I've tried placing the flag before and after the name argument.
+		args = append(args, "--generate-name")
+	}
+	return args
+}
+
+func (p *HelmChartInflationGeneratorPlugin) pullCommand() []string {
+	args := []string{
+		"pull",
+		"--untar",
+		"--untardir", p.absChartHome(),
+		"--repo", p.Repo,
+		p.Name}
+	if p.Version != "" {
+		args = append(args, "--version", p.Version)
+	}
+	return args
+}
+
+// chartExistsLocally will return true if the chart does exist in
+// local chart home.
+func (p *HelmChartInflationGeneratorPlugin) chartExistsLocally() (string, bool) {
+	path := filepath.Join(p.absChartHome(), p.Name)
+	s, err := os.Stat(path)
+	if err != nil {
+		return "", false
+	}
+	return path, s.IsDir()
+}
+
+// checkHelmVersion will return an error if the helm version is not V3
+func (p *HelmChartInflationGeneratorPlugin) checkHelmVersion() error {
+	stdout, err := p.runHelmCommand([]string{"version", "-c", "--short"})
+	if err != nil {
+		return err
+	}
+	r, err := regexp.Compile(`v?\d+(\.\d+)+`)
+	if err != nil {
+		return err
+	}
+	v := r.FindString(string(stdout))
+	if v == "" {
+		return fmt.Errorf("cannot find version string in %s", string(stdout))
+	}
+	if v[0] == 'v' {
+		v = v[1:]
+	}
+	majorVersion := strings.Split(v, ".")[0]
+	if majorVersion != "3" {
+		return fmt.Errorf("this plugin requires helm V3 but got v%s", v)
+	}
+	return nil
+}
+
+func NewHelmChartInflationGeneratorPlugin() resmap.GeneratorPlugin {
+	return &HelmChartInflationGeneratorPlugin{}
+}

api/builtins/ImageTagTransformer.go

@@ -0,0 +1,50 @@
+// Code generated by pluginator on ImageTagTransformer; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"sigs.k8s.io/kustomize/api/filters/imagetag"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+)
+
+// Find matching image declarations and replace
+// the name, tag and/or digest.
+type ImageTagTransformerPlugin struct {
+	ImageTag   types.Image       `json:"imageTag,omitempty" yaml:"imageTag,omitempty"`
+	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
+}
+
+func (p *ImageTagTransformerPlugin) Config(
+	_ *resmap.PluginHelpers, c []byte) (err error) {
+	p.ImageTag = types.Image{}
+	p.FieldSpecs = nil
+	return yaml.Unmarshal(c, p)
+}
+
+func (p *ImageTagTransformerPlugin) Transform(m resmap.ResMap) error {
+	for _, r := range m.Resources() {
+		// traverse all fields at first
+		err := r.ApplyFilter(imagetag.LegacyFilter{
+			ImageTag: p.ImageTag,
+		})
+		if err != nil {
+			return err
+		}
+		// then use user specified field specs
+		err = r.ApplyFilter(imagetag.Filter{
+			ImageTag: p.ImageTag,
+			FsSlice:  p.FieldSpecs,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func NewImageTagTransformerPlugin() resmap.TransformerPlugin {
+	return &ImageTagTransformerPlugin{}
+}

api/builtins/LabelTransformer.go

@@ -0,0 +1,44 @@
+// 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/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 {
+	if len(p.Labels) == 0 {
+		return nil
+	}
+	for _, r := range m.Resources() {
+		err := r.ApplyFilter(labels.Filter{
+			Labels:  p.Labels,
+			FsSlice: p.FieldSpecs,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func NewLabelTransformerPlugin() resmap.TransformerPlugin {
+	return &LabelTransformerPlugin{}
+}

api/builtins/LegacyOrderTransformer.go

@@ -0,0 +1,46 @@
+// Code generated by pluginator on LegacyOrderTransformer; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"sort"
+
+	"github.com/pkg/errors"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/resource"
+)
+
+// Sort the resources using an ordering defined in the Gvk class.
+// This puts cluster-wide basic resources with no
+// dependencies (like Namespace, StorageClass, etc.)
+// first, and resources with a high number of dependencies
+// (like ValidatingWebhookConfiguration) last.
+type LegacyOrderTransformerPlugin struct{}
+
+// Nothing needed for configuration.
+func (p *LegacyOrderTransformerPlugin) Config(
+	_ *resmap.PluginHelpers, _ []byte) (err error) {
+	return nil
+}
+
+func (p *LegacyOrderTransformerPlugin) Transform(m resmap.ResMap) (err error) {
+	resources := make([]*resource.Resource, m.Size())
+	ids := m.AllIds()
+	sort.Sort(resmap.IdSlice(ids))
+	for i, id := range ids {
+		resources[i], err = m.GetByCurrentId(id)
+		if err != nil {
+			return errors.Wrap(err, "expected match for sorting")
+		}
+	}
+	m.Clear()
+	for _, r := range resources {
+		m.Append(r)
+	}
+	return nil
+}
+
+func NewLegacyOrderTransformerPlugin() resmap.TransformerPlugin {
+	return &LegacyOrderTransformerPlugin{}
+}

api/builtins/NamespaceTransformer.go

@@ -0,0 +1,55 @@
+// 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/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"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"`
+}
+
+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 r.IsEmpty() {
+			// Don't mutate empty objects?
+			continue
+		}
+		r.StorePreviousId()
+		if err := r.ApplyFilter(namespace.Filter{
+			Namespace: p.Namespace,
+			FsSlice:   p.FieldSpecs,
+		}); 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
+}
+
+func NewNamespaceTransformerPlugin() resmap.TransformerPlugin {
+	return &NamespaceTransformerPlugin{}
+}

api/builtins/PatchJson6902Transformer.go

@@ -0,0 +1,93 @@
+// 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/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+)
+
+type PatchJson6902TransformerPlugin struct {
+	ldr          ifc.Loader
+	decodedPatch jsonpatch.Patch
+	Target       *types.Selector `json:"target,omitempty" yaml:"target,omitempty"`
+	Path         string          `json:"path,omitempty" yaml:"path,omitempty"`
+	JsonOp       string          `json:"jsonOp,omitempty" yaml:"jsonOp,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 {
+	if p.Target == nil {
+		return fmt.Errorf("must specify a target for patch %s", p.JsonOp)
+	}
+	resources, err := m.Select(*p.Target)
+	if err != nil {
+		return err
+	}
+	for _, res := range resources {
+		err = res.ApplyFilter(patchjson6902.Filter{
+			Patch: p.JsonOp,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func NewPatchJson6902TransformerPlugin() resmap.TransformerPlugin {
+	return &PatchJson6902TransformerPlugin{}
+}

api/builtins/PatchStrategicMergeTransformer.go

@@ -0,0 +1,89 @@
+// 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/resmap"
+	"sigs.k8s.io/kustomize/api/resource"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+)
+
+type PatchStrategicMergeTransformerPlugin struct {
+	loadedPatches []*resource.Resource
+	Paths         []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
+	Patches       string                      `json:"patches,omitempty" yaml:"patches,omitempty"`
+}
+
+func (p *PatchStrategicMergeTransformerPlugin) Config(
+	h *resmap.PluginHelpers, c []byte) (err error) {
+	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 {
+		patches, err := loadFromPaths(h, p.Paths)
+		if err != nil {
+			return err
+		}
+		p.loadedPatches = append(p.loadedPatches, patches...)
+	}
+	if p.Patches != "" {
+		patches, err := h.ResmapFactory().RF().SliceFromBytes([]byte(p.Patches))
+		if err != nil {
+			return err
+		}
+		p.loadedPatches = append(p.loadedPatches, patches...)
+	}
+	if len(p.loadedPatches) == 0 {
+		return fmt.Errorf(
+			"patch appears to be empty; files=%v, Patch=%s", p.Paths, p.Patches)
+	}
+	return nil
+}
+
+func loadFromPaths(
+	h *resmap.PluginHelpers,
+	paths []types.PatchStrategicMerge) (
+	result []*resource.Resource, err error) {
+	var patches []*resource.Resource
+	for _, path := range paths {
+		// For legacy reasons, attempt to treat the path string as
+		// actual patch content.
+		patches, err = h.ResmapFactory().RF().SliceFromBytes([]byte(path))
+		if err != nil {
+			// Failing that, treat it as a file path.
+			patches, err = h.ResmapFactory().RF().SliceFromPatches(
+				h.Loader(), []types.PatchStrategicMerge{path})
+			if err != nil {
+				return
+			}
+		}
+		result = append(result, patches...)
+	}
+	return
+}
+
+func (p *PatchStrategicMergeTransformerPlugin) Transform(m resmap.ResMap) error {
+	for _, patch := range p.loadedPatches {
+		target, err := m.GetById(patch.OrgId())
+		if err != nil {
+			return err
+		}
+		if err = m.ApplySmPatch(
+			resource.MakeIdSet([]*resource.Resource{target}), patch); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func NewPatchStrategicMergeTransformerPlugin() resmap.TransformerPlugin {
+	return &PatchStrategicMergeTransformerPlugin{}
+}

api/builtins/PatchTransformer.go

@@ -0,0 +1,145 @@
+// 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"
+	"sigs.k8s.io/kustomize/api/filters/patchjson6902"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/resource"
+	"sigs.k8s.io/kustomize/api/types"
+	"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"`
+	Options      map[string]bool `json:"options,omitempty" yaml:"options,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
+		if p.Options["allowNameChange"] {
+			p.loadedPatch.SetAllowNameChange("true")
+		}
+		if p.Options["allowKindChange"] {
+			p.loadedPatch.SetAllowKindChange("true")
+		}
+	} else {
+		p.decodedPatch = patchJson
+	}
+	return nil
+}
+
+func (p *PatchTransformerPlugin) Transform(m resmap.ResMap) error {
+	if p.loadedPatch == nil {
+		return p.transformJson6902(m, p.decodedPatch)
+	}
+	// The patch was a strategic merge patch
+	return p.transformStrategicMerge(m, p.loadedPatch)
+}
+
+// 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 target.ApplySmPatch(patch)
+	}
+	selected, err := m.Select(*p.Target)
+	if err != nil {
+		return err
+	}
+	return m.ApplySmPatch(resource.MakeIdSet(selected), patch)
+}
+
+// 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 {
+		res.StorePreviousId()
+		err = res.ApplyFilter(patchjson6902.Filter{
+			Patch: p.Patch,
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// 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{}
+}

api/builtins/PrefixSuffixTransformer.go

@@ -0,0 +1,104 @@
+// Code generated by pluginator on PrefixSuffixTransformer; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"errors"
+
+	"sigs.k8s.io/kustomize/api/filters/prefixsuffix"
+	"sigs.k8s.io/kustomize/api/resid"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	"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.FsSlice `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
+}
+
+// A Gvk skip list for prefix/suffix modification.
+// hard coded for now - eventually should be part of config.
+var prefixSuffixFieldSpecsToSkip = types.FsSlice{
+	{Gvk: resid.Gvk{Kind: "CustomResourceDefinition"}},
+	{Gvk: resid.Gvk{Group: "apiregistration.k8s.io", Kind: "APIService"}},
+	{Gvk: resid.Gvk{Kind: "Namespace"}},
+}
+
+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() {
+		// TODO: move this test into the filter (i.e. make a better filter)
+		if p.shouldSkip(r.OrgId()) {
+			continue
+		}
+		id := r.OrgId()
+		// current default configuration contains
+		// only one entry: "metadata/name" with no GVK
+		for _, fs := range p.FieldSpecs {
+			// TODO: this is redundant to filter (but needed for now)
+			if !id.IsSelected(&fs.Gvk) {
+				continue
+			}
+			// TODO: move this test into the filter.
+			if smellsLikeANameChange(&fs) {
+				// "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)
+				if p.Prefix != "" || p.Suffix != "" {
+					r.StorePreviousId()
+				}
+			}
+			err := r.ApplyFilter(prefixsuffix.Filter{
+				Prefix:    p.Prefix,
+				Suffix:    p.Suffix,
+				FieldSpec: fs,
+			})
+			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 NewPrefixSuffixTransformerPlugin() resmap.TransformerPlugin {
+	return &PrefixSuffixTransformerPlugin{}
+}

api/builtins/ReplacementTransformer.go

@@ -0,0 +1,65 @@
+// Code generated by pluginator on ReplacementTransformer; DO NOT EDIT.
+// pluginator {unknown  1970-01-01T00:00:00Z  }
+
+package builtins
+
+import (
+	"fmt"
+
+	"sigs.k8s.io/kustomize/api/filters/replacement"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/types"
+	kyaml "sigs.k8s.io/kustomize/kyaml/yaml"
+	"sigs.k8s.io/yaml"
+)
+
+// Replace values in targets with values from a source
+type ReplacementTransformerPlugin struct {
+	ReplacementList []types.ReplacementField `json:"replacements,omitempty" yaml:"replacements,omitempty"`
+	Replacements    []types.Replacement      `json:"omitempty" yaml:"omitempty"`
+}
+
+func (p *ReplacementTransformerPlugin) Config(
+	h *resmap.PluginHelpers, c []byte) (err error) {
+	p.ReplacementList = []types.ReplacementField{}
+	if err := yaml.Unmarshal(c, p); err != nil {
+		return err
+	}
+
+	for _, r := range p.ReplacementList {
+		if r.Path != "" && (r.Source != nil || len(r.Targets) != 0) {
+			return fmt.Errorf("cannot specify both path and inline replacement")
+		}
+		if r.Path != "" {
+			// load the replacement from the path
+			content, err := h.Loader().Load(r.Path)
+			if err != nil {
+				return err
+			}
+			repl := types.Replacement{}
+			if err := yaml.Unmarshal(content, &repl); err != nil {
+				return err
+			}
+			p.Replacements = append(p.Replacements, repl)
+		} else {
+			// replacement information is already loaded
+			p.Replacements = append(p.Replacements, r.Replacement)
+		}
+	}
+	return nil
+}
+
+func (p *ReplacementTransformerPlugin) Transform(m resmap.ResMap) (err error) {
+	var nodes []*kyaml.RNode
+	for _, r := range m.Resources() {
+		nodes = append(nodes, r.Node())
+	}
+	_, err = replacement.Filter{
+		Replacements: p.Replacements,
+	}.Filter(nodes)
+	return err
+}
+
+func NewReplacementTransformerPlugin() resmap.TransformerPlugin {
+	return &ReplacementTransformerPlugin{}
+}

api/builtins/ReplicaCountTransformer.go

@@ -0,0 +1,73 @@
+// 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/filters/replicacount"
+	"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 _, fs := range p.FieldSpecs {
+		matcher := p.createMatcher(fs)
+		resList := m.GetMatchingResourcesByAnyId(matcher)
+		if len(resList) > 0 {
+			found = true
+			for _, r := range resList {
+				// There are redundant checks in the filter
+				// that we'll live with until resolution of
+				// https://github.com/kubernetes-sigs/kustomize/issues/2506
+				err := r.ApplyFilter(replicacount.Filter{
+					Replica:   p.Replica,
+					FieldSpec: fs,
+				})
+				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(fs types.FieldSpec) resmap.IdMatcher {
+	return func(r resid.ResId) bool {
+		return r.Name == p.Replica.Name && r.Gvk.IsSelected(&fs.Gvk)
+	}
+}
+
+func NewReplicaCountTransformerPlugin() resmap.TransformerPlugin {
+	return &ReplicaCountTransformerPlugin{}
+}

api/builtins/SecretGenerator.go

@@ -0,0 +1,39 @@
+// 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{}
+}

api/builtins/ValueAddTransformer.go

@@ -0,0 +1,141 @@
+// 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/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 = res.ApplyFilter(namespace.Filter{
+					Namespace: p.Value,
+				})
+			} else {
+				err = res.ApplyFilter(valueadd.Filter{
+					Value:            p.Value,
+					FieldPath:        t.FieldPath,
+					FilePathPosition: t.FilePathPosition,
+				})
+			}
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func NewValueAddTransformerPlugin() resmap.TransformerPlugin {
+	return &ValueAddTransformerPlugin{}
+}

api/builtins/annotationstransformer.go

@@ -1,39 +0,0 @@
-// Code generated by pluginator on AnnotationsTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-	"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(
-	h *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 {
-	t, err := transform.NewMapTransformer(
-		p.FieldSpecs,
-		p.Annotations,
-	)
-	if err != nil {
-		return err
-	}
-	return t.Transform(m)
-}
-
-func NewAnnotationsTransformerPlugin() resmap.TransformerPlugin {
-	return &AnnotationsTransformerPlugin{}
-}

api/builtins/configmapgenerator.go

@@ -1,43 +0,0 @@
-// Code generated by pluginator on ConfigMapGenerator; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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.GeneratorOptions
-	types.ConfigMapArgs
-}
-
-func (p *ConfigMapGeneratorPlugin) Config(
-	h *resmap.PluginHelpers, config []byte) (err error) {
-	p.GeneratorOptions = types.GeneratorOptions{}
-	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.GeneratorOptions, p.ConfigMapArgs)
-}
-
-func NewConfigMapGeneratorPlugin() resmap.GeneratorPlugin {
-	return &ConfigMapGeneratorPlugin{}
-}

api/builtins/hashtransformer.go

@@ -1,39 +0,0 @@
-// Code generated by pluginator on HashTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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, config []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{}
-}

api/builtins/imagetagtransformer.go

@@ -1,185 +0,0 @@
-// Code generated by pluginator on ImageTagTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"fmt"
-	"regexp"
-	"strings"
-
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/yaml"
-)
-
-// Find matching image declarations and replace
-// the name, tag and/or digest.
-type ImageTagTransformerPlugin struct {
-	ImageTag   types.Image       `json:"imageTag,omitempty" yaml:"imageTag,omitempty"`
-	FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
-}
-
-func (p *ImageTagTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	p.ImageTag = types.Image{}
-	p.FieldSpecs = nil
-	return yaml.Unmarshal(c, p)
-}
-
-func (p *ImageTagTransformerPlugin) Transform(m resmap.ResMap) error {
-	for _, r := range m.Resources() {
-		for _, path := range p.FieldSpecs {
-			if !r.OrgId().IsSelected(&path.Gvk) {
-				continue
-			}
-			err := transform.MutateField(
-				r.Map(), path.PathSlice(), false, p.mutateImage)
-			if err != nil {
-				return err
-			}
-		}
-		// Kept for backward compatibility
-		if err := p.findAndReplaceImage(r.Map()); err != nil && r.OrgId().Kind != `CustomResourceDefinition` {
-			return err
-		}
-	}
-	return nil
-}
-
-func (p *ImageTagTransformerPlugin) mutateImage(in interface{}) (interface{}, error) {
-	original, ok := in.(string)
-	if !ok {
-		return nil, fmt.Errorf("image path is not of type string but %T", in)
-	}
-
-	if !isImageMatched(original, p.ImageTag.Name) {
-		return original, nil
-	}
-	name, tag := split(original)
-	if p.ImageTag.NewName != "" {
-		name = p.ImageTag.NewName
-	}
-	if p.ImageTag.NewTag != "" {
-		tag = ":" + p.ImageTag.NewTag
-	}
-	if p.ImageTag.Digest != "" {
-		tag = "@" + p.ImageTag.Digest
-	}
-	return name + tag, nil
-}
-
-// findAndReplaceImage replaces the image name and
-// tags inside one object.
-// It searches the object for container session
-// then loops though all images inside containers
-// session, finds matched ones and update the
-// image name and tag name
-func (p *ImageTagTransformerPlugin) findAndReplaceImage(obj map[string]interface{}) error {
-	paths := []string{"containers", "initContainers"}
-	updated := false
-	for _, path := range paths {
-		containers, found := obj[path]
-		if found {
-			if _, err := p.updateContainers(containers); err != nil {
-				return err
-			}
-			updated = true
-		}
-	}
-	if !updated {
-		return p.findContainers(obj)
-	}
-	return nil
-}
-
-func (p *ImageTagTransformerPlugin) updateContainers(in interface{}) (interface{}, error) {
-	containers, ok := in.([]interface{})
-	if !ok {
-		return nil, fmt.Errorf(
-			"containers path is not of type []interface{} but %T", in)
-	}
-	for i := range containers {
-		container := containers[i].(map[string]interface{})
-		containerImage, found := container["image"]
-		if !found {
-			continue
-		}
-		imageName := containerImage.(string)
-		if isImageMatched(imageName, p.ImageTag.Name) {
-			newImage, err := p.mutateImage(imageName)
-			if err != nil {
-				return nil, err
-			}
-			container["image"] = newImage
-		}
-	}
-	return containers, nil
-}
-
-func (p *ImageTagTransformerPlugin) findContainers(obj map[string]interface{}) error {
-	for key := range obj {
-		switch typedV := obj[key].(type) {
-		case map[string]interface{}:
-			err := p.findAndReplaceImage(typedV)
-			if err != nil {
-				return err
-			}
-		case []interface{}:
-			for i := range typedV {
-				item := typedV[i]
-				typedItem, ok := item.(map[string]interface{})
-				if ok {
-					err := p.findAndReplaceImage(typedItem)
-					if err != nil {
-						return err
-					}
-				}
-			}
-		}
-	}
-	return nil
-}
-
-func isImageMatched(s, t string) bool {
-	// Tag values are limited to [a-zA-Z0-9_.-].
-	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
-}
-
-func NewImageTagTransformerPlugin() resmap.TransformerPlugin {
-	return &ImageTagTransformerPlugin{}
-}

api/builtins/inventorytransformer.go

@@ -1,128 +0,0 @@
-// Code generated by pluginator on InventoryTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/hasher"
-	"sigs.k8s.io/kustomize/api/inventory"
-	"sigs.k8s.io/kustomize/api/kv"
-	"sigs.k8s.io/kustomize/api/resid"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/yaml"
-)
-
-type InventoryTransformerPlugin struct {
-	h                *resmap.PluginHelpers
-	types.ObjectMeta `json:"metadata,omitempty" yaml:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
-	Policy           string `json:"policy,omitempty" yaml:"policy,omitempty"`
-}
-
-func (p *InventoryTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	p.h = h
-	err = yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	if p.Policy == "" {
-		p.Policy = types.GarbageIgnore.String()
-	}
-	if p.Policy != types.GarbageCollect.String() &&
-		p.Policy != types.GarbageIgnore.String() {
-		return fmt.Errorf(
-			"unrecognized garbagePolicy '%s'", p.Policy)
-	}
-	return nil
-}
-
-// Transform generates an inventory object from the input ResMap.
-// This ConfigMap supports the pruning command in
-// the client side tool proposed here:
-// https://github.com/kubernetes/enhancements/pull/810
-//
-// The inventory data is written to the ConfigMap's
-// annotations, rather than to the key-value pairs in
-// the ConfigMap's data field, since
-//   1. Keys in a ConfigMap's data field are too
-//      constrained for this purpose.
-//   2. Using annotations allow any object to be used,
-//      not just a ConfigMap, should some other object
-//      (e.g. some App object) become more desirable
-//      for this purpose.
-func (p *InventoryTransformerPlugin) Transform(m resmap.ResMap) error {
-
-	inv, h, err := makeInventory(m)
-	if err != nil {
-		return err
-	}
-
-	args := types.ConfigMapArgs{}
-	args.Name = p.Name
-	args.Namespace = p.Namespace
-	opts := &types.GeneratorOptions{
-		Annotations: make(map[string]string),
-	}
-	opts.Annotations[inventory.HashAnnotation] = h
-	err = inv.UpdateAnnotations(opts.Annotations)
-	if err != nil {
-		return err
-	}
-
-	cm, err := p.h.ResmapFactory().RF().MakeConfigMap(
-		kv.NewLoader(p.h.Loader(), p.h.Validator()), opts, &args)
-	if err != nil {
-		return err
-	}
-
-	if p.Policy == types.GarbageCollect.String() {
-		for _, byeBye := range m.AllIds() {
-			m.Remove(byeBye)
-		}
-	}
-	return m.Append(cm)
-}
-
-func makeInventory(m resmap.ResMap) (
-	inv *inventory.Inventory, hash string, err error) {
-	inv = inventory.NewInventory()
-	var keys []string
-	for _, r := range m.Resources() {
-		ns := r.GetNamespace()
-		item := resid.NewResIdWithNamespace(r.GetGvk(), r.GetName(), ns)
-		if _, ok := inv.Current[item]; ok {
-			return nil, "", fmt.Errorf(
-				"item '%v' already in inventory", item)
-		}
-		inv.Current[item], err = computeRefs(r, m)
-		if err != nil {
-			return nil, "", err
-		}
-		keys = append(keys, item.String())
-	}
-	h, err := hasher.SortArrayAndComputeHash(keys)
-	return inv, h, err
-}
-
-func computeRefs(
-	r *resource.Resource, m resmap.ResMap) (refs []resid.ResId, err error) {
-	for _, refid := range r.GetRefBy() {
-		ref, err := m.GetByCurrentId(refid)
-		if err != nil {
-			return nil, err
-		}
-		refs = append(
-			refs,
-			resid.NewResIdWithNamespace(
-				ref.GetGvk(), ref.GetName(), ref.GetNamespace()))
-	}
-	return
-}
-
-func NewInventoryTransformerPlugin() resmap.TransformerPlugin {
-	return &InventoryTransformerPlugin{}
-}

api/builtins/labeltransformer.go

@@ -1,39 +0,0 @@
-// Code generated by pluginator on LabelTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/transform"
-	"sigs.k8s.io/kustomize/api/types"
-	"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(
-	h *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 {
-	t, err := transform.NewMapTransformer(
-		p.FieldSpecs,
-		p.Labels,
-	)
-	if err != nil {
-		return err
-	}
-	return t.Transform(m)
-}
-
-func NewLabelTransformerPlugin() resmap.TransformerPlugin {
-	return &LabelTransformerPlugin{}
-}

api/builtins/legacyordertransformer.go

@@ -1,46 +0,0 @@
-// Code generated by pluginator on LegacyOrderTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"sort"
-
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-)
-
-// Sort the resources using an ordering defined in the Gvk class.
-// This puts cluster-wide basic resources with no
-// dependencies (like Namespace, StorageClass, etc.)
-// first, and resources with a high number of dependencies
-// (like ValidatingWebhookConfiguration) last.
-type LegacyOrderTransformerPlugin struct{}
-
-// Nothing needed for configuration.
-func (p *LegacyOrderTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	return nil
-}
-
-func (p *LegacyOrderTransformerPlugin) Transform(m resmap.ResMap) (err error) {
-	resources := make([]*resource.Resource, m.Size())
-	ids := m.AllIds()
-	sort.Sort(resmap.IdSlice(ids))
-	for i, id := range ids {
-		resources[i], err = m.GetByCurrentId(id)
-		if err != nil {
-			return errors.Wrap(err, "expected match for sorting")
-		}
-	}
-	m.Clear()
-	for _, r := range resources {
-		m.Append(r)
-	}
-	return nil
-}
-
-func NewLegacyOrderTransformerPlugin() resmap.TransformerPlugin {
-	return &LegacyOrderTransformerPlugin{}
-}

api/builtins/namespacetransformer.go

@@ -1,131 +0,0 @@
-// Code generated by pluginator on NamespaceTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"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"`
-}
-
-func (p *NamespaceTransformerPlugin) Config(
-	h *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()
-		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 tranformation produces ID conflict: %#v", matches)
-		}
-	}
-	return nil
-}
-
-const metaNamespace = "metadata/namespace"
-
-// 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 != metaNamespace || (fs.Path == metaNamespace && id.IsNamespaceableKind())) {
-			res = append(res, fs)
-		}
-	}
-	return res
-}
-
-func (p *NamespaceTransformerPlugin) changeNamespace(
-	referrer *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{}
-}

api/builtins/patchjson6902transformer.go

@@ -1,100 +0,0 @@
-// Code generated by pluginator on PatchJson6902Transformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"fmt"
-
-	"github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
-	"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/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"`
-}
-
-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
-	}
-	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)
-}
-
-func NewPatchJson6902TransformerPlugin() resmap.TransformerPlugin {
-	return &PatchJson6902TransformerPlugin{}
-}

api/builtins/patchstrategicmergetransformer.go

@@ -1,90 +0,0 @@
-// Code generated by pluginator on PatchStrategicMergeTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"fmt"
-
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"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"`
-}
-
-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
-		}
-		err = target.Patch(patch.Kunstructured)
-		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
-			}
-		}
-	}
-	return nil
-}
-
-func NewPatchStrategicMergeTransformerPlugin() resmap.TransformerPlugin {
-	return &PatchStrategicMergeTransformerPlugin{}
-}

api/builtins/patchtransformer.go

@@ -1,145 +0,0 @@
-// Code generated by pluginator on PatchTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-package builtins
-
-import (
-	"fmt"
-
-	"github.com/evanphx/json-patch"
-	"github.com/pkg/errors"
-	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/api/resource"
-	"sigs.k8s.io/kustomize/api/types"
-	"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"`
-}
-
-func (p *PatchTransformerPlugin) Config(
-	h *resmap.PluginHelpers, c []byte) (err error) {
-	err = yaml.Unmarshal(c, p)
-	if err != nil {
-		return err
-	}
-	if p.Patch == "" && p.Path == "" {
-		err = fmt.Errorf(
-			"must specify one of patch and path in\n%s", string(c))
-		return
-	}
-	if p.Patch != "" && p.Path != "" {
-		err = fmt.Errorf(
-			"patch and path can't be set at the same time\n%s", string(c))
-		return
-	}
-	var in []byte
-	if p.Path != "" {
-		in, err = h.Loader().Load(p.Path)
-		if err != nil {
-			return
-		}
-	}
-	if p.Patch != "" {
-		in = []byte(p.Patch)
-	}
-
-	patchSM, errSM := h.ResmapFactory().RF().FromBytes(in)
-	patchJson, errJson := jsonPatchFromBytes(in)
-	if errSM != nil && errJson != nil {
-		err = fmt.Errorf(
-			"unable to get either a Strategic Merge Patch or JSON patch 6902 from %s", p.Patch)
-		return
-	}
-	if errSM == nil && errJson != nil {
-		p.loadedPatch = patchSM
-	}
-	if errJson == nil && errSM != nil {
-		p.decodedPatch = patchJson
-	}
-	if patchSM != nil && patchJson != nil {
-		err = fmt.Errorf(
-			"a patch can't be both a Strategic Merge Patch and JSON patch 6902 %s", p.Patch)
-	}
-
-	return nil
-}
-
-func (p *PatchTransformerPlugin) Transform(m resmap.ResMap) error {
-	if p.loadedPatch != nil && p.Target == nil {
-		target, err := m.GetById(p.loadedPatch.OrgId())
-		if err != nil {
-			return err
-		}
-		err = target.Patch(p.loadedPatch.Kunstructured)
-		if err != nil {
-			return err
-		}
-		return nil
-	}
-
-	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 {
-		if p.decodedPatch != nil {
-			rawObj, err := res.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.Patch)
-			}
-			err = res.UnmarshalJSON(modifiedObj)
-			if err != nil {
-				return err
-			}
-		}
-		if p.loadedPatch != nil {
-			patchCopy := p.loadedPatch.DeepCopy()
-			patchCopy.SetName(res.GetName())
-			patchCopy.SetNamespace(res.GetNamespace())
-			patchCopy.SetGvk(res.GetGvk())
-			err = res.Patch(patchCopy.Kunstructured)
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-// 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{}
-}

api/builtins/prefixsuffixtransformer.go

@@ -1,123 +0,0 @@
-// Code generated by pluginator on PrefixSuffixTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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(
-	h *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{}
-}

api/builtins/replicacounttransformer.go

@@ -1,89 +0,0 @@
-// Code generated by pluginator on ReplicaCountTransformer; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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(
-	h *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{}
-}

api/builtins/secretgenerator.go

@@ -1,42 +0,0 @@
-// Code generated by pluginator on SecretGenerator; DO NOT EDIT.
-// pluginator {Version:unknown GitCommit:$Format:%H$ BuildDate:1970-01-01T00:00:00Z GoOs:linux GoArch:amd64}
-
-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.GeneratorOptions
-	types.SecretArgs
-}
-
-func (p *SecretGeneratorPlugin) Config(h *resmap.PluginHelpers, config []byte) (err error) {
-	p.GeneratorOptions = types.GeneratorOptions{}
-	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.GeneratorOptions, p.SecretArgs)
-}
-
-func NewSecretGeneratorPlugin() resmap.GeneratorPlugin {
-	return &SecretGeneratorPlugin{}
-}

api/filesys/confirmeddir_test.go

@@ -4,6 +4,7 @@
 package filesys_test
 
 import (
+	"os"
 	"path/filepath"
 	"testing"
 
@@ -98,6 +99,7 @@ func TestNewTempConfirmDir(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
+	defer os.RemoveAll(string(tmp))
 
 	delinked, err := filepath.EvalSymlinks(string(tmp))
 	if err != nil {

api/filesys/file.go

@@ -6,34 +6,8 @@ package filesys
 import (
 	"io"
 	"os"
-	"time"
 )
 
-var _ os.FileInfo = &fileInfo{}
-
-// fileInfo implements os.FileInfo for a fileInMemory instance.
-type fileInfo struct {
-	*fileInMemory
-}
-
-// Name returns the name of the file
-func (fi *fileInfo) Name() string { return fi.name }
-
-// Size returns the size of the file
-func (fi *fileInfo) Size() int64 { return int64(len(fi.content)) }
-
-// Mode returns the file mode
-func (fi *fileInfo) Mode() os.FileMode { return 0777 }
-
-// ModTime returns the modification time
-func (fi *fileInfo) ModTime() time.Time { return time.Time{} }
-
-// IsDir returns if it is a directory
-func (fi *fileInfo) IsDir() bool { return fi.dir }
-
-// Sys should return underlying data source, but it now returns nil
-func (fi *fileInfo) Sys() interface{} { return nil }
-
 // File groups the basic os.File methods.
 type File interface {
 	io.ReadWriteCloser

api/filesys/fileinfo.go

@@ -0,0 +1,34 @@
+// 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 }

api/filesys/fileinmemory.go

@@ -1,56 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"bytes"
-	"os"
-)
-
-var _ File = &fileInMemory{}
-
-// fileInMemory implements File in-memory for tests.
-type fileInMemory struct {
-	name    string
-	content []byte
-	dir     bool
-	open    bool
-}
-
-// makeDir makes a fake directory.
-func makeDir(name string) *fileInMemory {
-	return &fileInMemory{name: name, dir: true}
-}
-
-// Close marks the fake file closed.
-func (f *fileInMemory) Close() error {
-	f.open = false
-	return nil
-}
-
-// Read never fails, and doesn't mutate p.
-func (f *fileInMemory) Read(p []byte) (n int, err error) {
-	return len(p), nil
-}
-
-// Write saves the contents of the argument to memory.
-func (f *fileInMemory) Write(p []byte) (n int, err error) {
-	f.content = p
-	return len(p), nil
-}
-
-// ContentMatches returns true if v matches fake file's content.
-func (f *fileInMemory) ContentMatches(v []byte) bool {
-	return bytes.Equal(v, f.content)
-}
-
-// GetContent the content of a fake file.
-func (f *fileInMemory) GetContent() []byte {
-	return f.content
-}
-
-// Stat returns nil.
-func (f *fileInMemory) Stat() (os.FileInfo, error) {
-	return nil, nil
-}

api/filesys/filesystem.go

@@ -8,13 +8,20 @@ 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(name string) (File, error)
+	Create(path string) (File, error)
 	// MkDir makes a directory.
 	Mkdir(path string) error
-	// MkDir makes a directory path, creating intervening directories.
+	// MkDirAll makes a directory path, creating intervening directories.
 	MkdirAll(path string) error
 	// RemoveAll removes path and any children it contains.
 	RemoveAll(path string) error
@@ -30,11 +37,13 @@ type FileSystem interface {
 	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
+	// 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.
+	// 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

api/filesys/fsinmemory.go

@@ -1,223 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-)
-
-var _ FileSystem = &fsInMemory{}
-
-// fsInMemory implements FileSystem using a in-memory filesystem
-// primarily for use in tests.
-type fsInMemory struct {
-	m map[string]*fileInMemory
-}
-
-// MakeFsInMemory returns an instance of fsInMemory with no files in it.
-func MakeFsInMemory() FileSystem {
-	result := &fsInMemory{m: map[string]*fileInMemory{}}
-	result.Mkdir(separator)
-	return result
-}
-
-const (
-	separator = string(filepath.Separator)
-	doubleSep = separator + separator
-)
-
-// Create assures a fake file appears in the in-memory file system.
-func (fs *fsInMemory) Create(name string) (File, error) {
-	f := &fileInMemory{}
-	f.open = true
-	fs.m[name] = f
-	return fs.m[name], nil
-}
-
-// Mkdir assures a fake directory appears in the in-memory file system.
-func (fs *fsInMemory) Mkdir(name string) error {
-	fs.m[name] = makeDir(name)
-	return nil
-}
-
-// MkdirAll delegates to Mkdir
-func (fs *fsInMemory) MkdirAll(name string) error {
-	return fs.Mkdir(name)
-}
-
-// RemoveAll presumably does rm -r on a path.
-// There's no error.
-func (fs *fsInMemory) RemoveAll(name string) error {
-	var toRemove []string
-	for k := range fs.m {
-		if strings.HasPrefix(k, name) {
-			toRemove = append(toRemove, k)
-		}
-	}
-	for _, k := range toRemove {
-		delete(fs.m, k)
-	}
-	return nil
-}
-
-// Open returns a fake file in the open state.
-func (fs *fsInMemory) Open(name string) (File, error) {
-	if _, found := fs.m[name]; !found {
-		return nil, fmt.Errorf("file %q cannot be opened", name)
-	}
-	return fs.m[name], nil
-}
-
-// CleanedAbs cannot fail.
-func (fs *fsInMemory) CleanedAbs(path string) (ConfirmedDir, string, error) {
-	if fs.IsDir(path) {
-		return ConfirmedDir(path), "", nil
-	}
-	d := filepath.Dir(path)
-	if d == path {
-		return ConfirmedDir(d), "", nil
-	}
-	return ConfirmedDir(d), filepath.Base(path), nil
-}
-
-// Exists returns true if file is known.
-func (fs *fsInMemory) Exists(name string) bool {
-	_, found := fs.m[name]
-	return found
-}
-
-// Glob returns the list of matching files
-func (fs *fsInMemory) Glob(pattern string) ([]string, error) {
-	var result []string
-	for p := range fs.m {
-		if fs.pathMatch(p, pattern) {
-			result = append(result, p)
-		}
-	}
-	sort.Strings(result)
-	return result, nil
-}
-
-// IsDir returns true if the file exists and is a directory.
-func (fs *fsInMemory) IsDir(name string) bool {
-	f, found := fs.m[name]
-	if found && f.dir {
-		return true
-	}
-	if !strings.HasSuffix(name, separator) {
-		name = name + separator
-	}
-	for k := range fs.m {
-		if strings.HasPrefix(k, name) {
-			return true
-		}
-	}
-	return false
-}
-
-// ReadFile always returns an empty bytes and error depending on content of m.
-func (fs *fsInMemory) ReadFile(name string) ([]byte, error) {
-	if ff, found := fs.m[name]; found {
-		return ff.content, nil
-	}
-	return nil, fmt.Errorf("cannot read file %q", name)
-}
-
-// WriteFile always succeeds and does nothing.
-func (fs *fsInMemory) WriteFile(name string, c []byte) error {
-	ff := &fileInMemory{}
-	ff.Write(c)
-	fs.m[name] = ff
-	return nil
-}
-
-// Walk implements filepath.Walk using the fake filesystem.
-func (fs *fsInMemory) Walk(path string, walkFn filepath.WalkFunc) error {
-	info, err := fs.lstat(path)
-	if err != nil {
-		err = walkFn(path, info, err)
-	} else {
-		err = fs.walk(path, info, walkFn)
-	}
-	if err == filepath.SkipDir {
-		return nil
-	}
-	return err
-}
-
-func (fs *fsInMemory) pathMatch(path, pattern string) bool {
-	match, _ := filepath.Match(pattern, path)
-	return match
-}
-
-func (fs *fsInMemory) lstat(path string) (*fileInfo, error) {
-	f, found := fs.m[path]
-	if !found {
-		return nil, os.ErrNotExist
-	}
-	return &fileInfo{f}, nil
-}
-
-func (fs *fsInMemory) join(elem ...string) string {
-	for i, e := range elem {
-		if e != "" {
-			return strings.Replace(
-				strings.Join(elem[i:], separator), doubleSep, separator, -1)
-		}
-	}
-	return ""
-}
-
-func (fs *fsInMemory) readDirNames(path string) []string {
-	var names []string
-	if !strings.HasSuffix(path, separator) {
-		path += separator
-	}
-	pathSegments := strings.Count(path, separator)
-	for name := range fs.m {
-		if name == path {
-			continue
-		}
-		if strings.Count(name, separator) > pathSegments {
-			continue
-		}
-		if strings.HasPrefix(name, path) {
-			names = append(names, filepath.Base(name))
-		}
-	}
-	sort.Strings(names)
-	return names
-}
-
-func (fs *fsInMemory) walk(path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
-	if !info.IsDir() {
-		return walkFn(path, info, nil)
-	}
-
-	names := fs.readDirNames(path)
-	if err := walkFn(path, info, nil); err != nil {
-		return err
-	}
-	for _, name := range names {
-		filename := fs.join(path, name)
-		fileInfo, err := fs.lstat(filename)
-		if err != nil {
-			if err := walkFn(filename, fileInfo, os.ErrNotExist); err != nil && err != filepath.SkipDir {
-				return err
-			}
-		} else {
-			err = fs.walk(filename, fileInfo, walkFn)
-			if err != nil {
-				if !fileInfo.IsDir() || err != filepath.SkipDir {
-					return err
-				}
-			}
-		}
-	}
-	return nil
-}

api/filesys/fsinmemory_test.go

@@ -1,149 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys_test
-
-import (
-	"bytes"
-	"reflect"
-	"testing"
-
-	. "sigs.k8s.io/kustomize/api/filesys"
-)
-
-func TestExists(t *testing.T) {
-	fSys := MakeFsInMemory()
-	if fSys.Exists("foo") {
-		t.Fatalf("expected no foo")
-	}
-	fSys.Mkdir("/")
-	if !fSys.IsDir("/") {
-		t.Fatalf("expected dir at /")
-	}
-}
-
-func TestIsDir(t *testing.T) {
-	fSys := MakeFsInMemory()
-	expectedName := "my-dir"
-	err := fSys.Mkdir(expectedName)
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	shouldExist(t, fSys, expectedName)
-	if !fSys.IsDir(expectedName) {
-		t.Fatalf(expectedName + " should be a dir")
-	}
-}
-
-func shouldExist(t *testing.T, fSys FileSystem, name string) {
-	if !fSys.Exists(name) {
-		t.Fatalf(name + " should exist")
-	}
-}
-
-func shouldNotExist(t *testing.T, fSys FileSystem, name string) {
-	if fSys.Exists(name) {
-		t.Fatalf(name + " should not exist")
-	}
-}
-
-func TestRemoveAll(t *testing.T) {
-	fSys := MakeFsInMemory()
-	fSys.WriteFile("/foo/project/file.yaml", []byte("Unused"))
-	fSys.WriteFile("/foo/project/subdir/file.yaml", []byte("Unused"))
-	fSys.WriteFile("/foo/apple/subdir/file.yaml", []byte("Unused"))
-	shouldExist(t, fSys, "/foo/project/file.yaml")
-	shouldExist(t, fSys, "/foo/project/subdir/file.yaml")
-	shouldExist(t, fSys, "/foo/apple/subdir/file.yaml")
-	err := fSys.RemoveAll("/foo/project")
-	if err != nil {
-		t.Fatalf("Unexpected error: %v", err)
-	}
-	shouldNotExist(t, fSys, "/foo/project/file.yaml")
-	shouldNotExist(t, fSys, "/foo/project/subdir/file.yaml")
-	shouldExist(t, fSys, "/foo/apple/subdir/file.yaml")
-}
-
-func TestIsDirDeeper(t *testing.T) {
-	fSys := MakeFsInMemory()
-	fSys.WriteFile("/foo/project/file.yaml", []byte("Unused"))
-	fSys.WriteFile("/foo/project/subdir/file.yaml", []byte("Unused"))
-	if !fSys.IsDir("/") {
-		t.Fatalf("/ should be a dir")
-	}
-	if !fSys.IsDir("/foo") {
-		t.Fatalf("/foo should be a dir")
-	}
-	if !fSys.IsDir("/foo/project") {
-		t.Fatalf("/foo/project should be a dir")
-	}
-	if fSys.IsDir("/fo") {
-		t.Fatalf("/fo should not be a dir")
-	}
-	if fSys.IsDir("/x") {
-		t.Fatalf("/x should not be a dir")
-	}
-}
-
-func TestCreate(t *testing.T) {
-	fSys := MakeFsInMemory()
-	f, err := fSys.Create("foo")
-	if f == nil {
-		t.Fatalf("expected file")
-	}
-	if err != nil {
-		t.Fatalf("unexpected error")
-	}
-	shouldExist(t, fSys, "foo")
-}
-
-func TestReadFile(t *testing.T) {
-	fSys := MakeFsInMemory()
-	f, err := fSys.Create("foo")
-	if f == nil {
-		t.Fatalf("expected file")
-	}
-	if err != nil {
-		t.Fatalf("unexpected error")
-	}
-	content, err := fSys.ReadFile("foo")
-	if len(content) != 0 {
-		t.Fatalf("expected no content")
-	}
-	if err != nil {
-		t.Fatalf("expected no error")
-	}
-}
-
-func TestWriteFile(t *testing.T) {
-	fSys := MakeFsInMemory()
-	c := []byte("heybuddy")
-	err := fSys.WriteFile("foo", c)
-	if err != nil {
-		t.Fatalf("expected no error")
-	}
-	content, err := fSys.ReadFile("foo")
-	if err != nil {
-		t.Fatalf("expected read to work: %v", err)
-	}
-	if bytes.Compare(c, content) != 0 {
-		t.Fatalf("incorrect content: %v", content)
-	}
-}
-
-func TestGlob(t *testing.T) {
-	fSys := MakeFsInMemory()
-	fSys.Create("dir/foo")
-	fSys.Create("dir/bar")
-	files, err := fSys.Glob("dir/*")
-	if err != nil {
-		t.Fatalf("expected no error")
-	}
-	expected := []string{
-		"dir/bar",
-		"dir/foo",
-	}
-	if !reflect.DeepEqual(files, expected) {
-		t.Fatalf("incorrect files found by glob: %v", files)
-	}
-}

api/filesys/fsnode.go

@@ -0,0 +1,602 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package filesys
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"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 offset is not nil the file is open and it tracks
+	// the current file offset.
+	offset *int
+}
+
+// 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.
+		if result.offset != nil {
+			return nil, fmt.Errorf("cannot add already opened file '%s'", n.Path())
+		}
+		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) {
+	f, err := n.AddFile(path, nil)
+	if err != nil {
+		return f, err
+	}
+	f.offset = new(int)
+	return f, nil
+}
+
+// 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 in read-write mode and sets the offset its start.
+// Writing right after opening the file will replace the original content
+// and move the offset forward, as with a file opened with O_RDWR | O_CREATE.
+//
+// As an example, let's consider a file with content "content":
+// - open: sets offset to start, content is "content"
+// - write "@": offset increases by one, the content is now "@ontent"
+// - read the rest: since offset is 1, the read operation returns "ontent"
+// - write "$": offset is at EOF, so "$" is appended and content is now "@ontent$"
+// - read the rest: returns 0 bytes and EOF
+// - close: the content is still "@ontent$"
+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)
+	}
+	if result.offset != nil {
+		return nil, fmt.Errorf("cannot open previously opened file '%s'", path)
+	}
+	result.offset = new(int)
+	return result, nil
+}
+
+// Close marks the node closed.
+func (n *fsNode) Close() error {
+	if n.offset == nil {
+		return fmt.Errorf("cannot close already closed file '%s'", n.Path())
+	}
+	n.offset = nil
+	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)
+	}
+	if result.isNodeADir() {
+		return nil, fmt.Errorf("cannot read content from non-file '%s'", n.Path())
+	}
+	c = make([]byte, len(result.content))
+	copy(c, result.content)
+	return c, nil
+}
+
+// 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())
+	}
+	if n.offset == nil {
+		return 0, fmt.Errorf("cannot read from closed file '%s'", n.Path())
+	}
+
+	rest := n.content[*n.offset:]
+	if len(d) < len(rest) {
+		rest = rest[:len(d)]
+	} else {
+		err = io.EOF
+	}
+	copy(d, rest)
+	*n.offset += len(rest)
+	return len(rest), err
+}
+
+// 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())
+	}
+	if n.offset == nil {
+		return 0, fmt.Errorf("cannot write to closed file '%s'", n.Path())
+	}
+	n.content = append(n.content[:*n.offset], p...)
+	*n.offset = len(n.content)
+	return len(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
+}

api/filesys/fsnode_test.go

@@ -0,0 +1,854 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package filesys
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"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) {
+	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())
+		}
+		buff, err := ioutil.ReadAll(f)
+		if err != nil {
+			t.Fatalf("%s; unexpected error: %v", c.what, err)
+		}
+		if string(buff) != 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))
+		}
+		if err := f.Close(); err != nil {
+			t.Fatalf("%s; unexpected error: %v", c.what, err)
+		}
+		stuff, err = fSys.ReadFile(c.path)
+		if err != nil {
+			t.Fatalf("%s; unexpected error: %v", c.what, err)
+		}
+		both := content + shortContent
+		if string(stuff) != both {
+			t.Fatalf("%s; unexpected content '%s', expected '%s'", c.what, stuff, both)
+		}
+		if err := fSys.WriteFile(c.path, []byte(shortContent)); err != nil {
+			t.Fatalf("%s; unexpected error: %v", c.what, err)
+		}
+		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', expected '%s'", c.what, stuff, shortContent)
+		}
+	}
+
+	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) {
+	t.Helper()
+	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)
+		}
+	}
+}
+
+func TestFileOps(t *testing.T) {
+	const path = "foo.txt"
+	content := strings.Repeat("longest content", 100)
+
+	fs := MakeFsInMemory()
+	f, err := fs.Create(path)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if _, err := fs.Open(path); err == nil {
+		t.Fatalf("expected already opened error, got nil")
+	}
+	if _, err := fmt.Fprint(f, content); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if err := f.Close(); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if err := f.Close(); err == nil {
+		t.Fatalf("expected already closed error, got nil")
+	}
+
+	f, err = fs.Open(path)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	defer f.Close()
+
+	for {
+		buf := make([]byte, rand.Intn(10))
+		n, err := f.Read(buf)
+		if err != nil && err != io.EOF {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if content[:n] != string(buf[:n]) {
+			t.Fatalf("unexpected read: expected %q got %q", content[:n], buf[:n])
+		}
+		content = content[n:]
+		if err != io.EOF {
+			continue
+		}
+		if len(content) == 0 {
+			break
+		}
+		t.Fatalf("unexpected EOF: remaining %d bytes", len(content))
+	}
+}

api/filesys/rpath.go

@@ -1,12 +0,0 @@
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-package filesys
-
-import "path/filepath"
-
-// RootedPath returns a rooted path, e.g. "/foo/bar" as
-// opposed to "foo/bar".
-func RootedPath(elem ...string) string {
-	return separator + filepath.Join(elem...)
-}

api/filesys/util.go

@@ -0,0 +1,125 @@
+// 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:]...))
+}

api/filesys/util_test.go

@@ -0,0 +1,374 @@
+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)
+		}
+	}
+}

api/filters/annotations/annotations.go

@@ -0,0 +1,44 @@
+// 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 := yaml.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: filtersutil.SetEntry(
+						k, f.Annotations[k], yaml.NodeTagString),
+					CreateKind: yaml.MappingNode, // Annotations are MappingNodes.
+					CreateTag:  yaml.NodeTagMap,
+				}); err != nil {
+					return nil, err
+				}
+			}
+			return node, nil
+		})).Filter(nodes)
+	return nodes, err
+}

api/filters/annotations/annotations_test.go

@@ -0,0 +1,226 @@
+// 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()
+			}
+		})
+	}
+}

api/filters/annotations/doc.go

@@ -0,0 +1,6 @@
+// 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

api/filters/annotations/example_test.go

@@ -0,0 +1,61 @@
+// 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",
+				"booleanValue": "true",
+				"numberValue":  "42",
+			},
+			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:
+	//     booleanValue: "true"
+	//     foo: bar
+	//     numberValue: "42"
+	// ---
+	// apiVersion: example.com/v1
+	// kind: Bar
+	// metadata:
+	//   name: instance
+	//   annotations:
+	//     booleanValue: "true"
+	//     foo: bar
+	//     numberValue: "42"
+}

api/filters/fieldspec/doc.go

@@ -0,0 +1,6 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package fieldspec contains a yaml.Filter to modify a resource
+// that matches the FieldSpec.
+package fieldspec

api/filters/fieldspec/example_test.go

@@ -0,0 +1,61 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fieldspec_test
+
+import (
+	"bytes"
+	"log"
+	"os"
+
+	. "sigs.k8s.io/kustomize/api/filters/fieldspec"
+	"sigs.k8s.io/kustomize/api/filters/filtersutil"
+	"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 := Filter{
+		CreateKind: yaml.ScalarNode,
+		SetValue:   filtersutil.SetScalar("green"),
+		FieldSpec:  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
+}

api/filters/fieldspec/fieldspec.go

@@ -0,0 +1,185 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fieldspec
+
+import (
+	"fmt"
+	"strings"
+
+	"sigs.k8s.io/kustomize/api/filters/filtersutil"
+	"sigs.k8s.io/kustomize/api/internal/utils"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kyaml/errors"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+var _ yaml.Filter = Filter{}
+
+// Filter possibly mutates its object argument using a FieldSpec.
+// If the object matches the FieldSpec, and the node found
+// by following the fieldSpec's path is non-null, this filter calls
+// the setValue function on the node at the end of the path.
+// If any part of the path doesn't exist, the filter returns
+// without doing anything and without error, unless it was set
+// to create the path. If set to create, it creates a tree of maps
+// along the path, and the leaf node gets the setValue called on it.
+// Error on GVK mismatch, empty or poorly formed path.
+// Filter expect kustomize style paths, not JSON paths.
+// Filter stores internal state and should not be reused
+type Filter struct {
+	// FieldSpec contains the path to the value to set.
+	FieldSpec types.FieldSpec `yaml:"fieldSpec"`
+
+	// Set the field using this function
+	SetValue filtersutil.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 Filter) 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 = utils.PathSplitter(fltr.FieldSpec.Path)
+	err := fltr.filter(obj)
+	if err != nil {
+		s, _ := obj.String()
+		return nil, errors.WrapPrefixf(err,
+			"considering field '%s' of object\n%v", fltr.FieldSpec.Path, s)
+	}
+	return obj, nil
+}
+
+// Recursively called.
+func (fltr Filter) filter(obj *yaml.RNode) error {
+	if len(fltr.path) == 0 {
+		// found the field -- set its value
+		return fltr.SetValue(obj)
+	}
+	if obj.IsTaggedNull() || obj.IsNil() {
+		return nil
+	}
+	switch obj.YNode().Kind {
+	case yaml.SequenceNode:
+		return fltr.handleSequence(obj)
+	case yaml.MappingNode:
+		return fltr.handleMap(obj)
+	case yaml.AliasNode:
+		return fltr.filter(yaml.NewRNode(obj.YNode().Alias))
+	default:
+		return errors.Errorf("expected sequence or mapping node")
+	}
+}
+
+// handleMap calls filter on the map field matching the next path element
+func (fltr Filter) handleMap(obj *yaml.RNode) error {
+	fieldName, isSeq := isSequenceField(fltr.path[0])
+	if fieldName == "" {
+		return fmt.Errorf("cannot set or create an empty field name")
+	}
+	// lookup the field matching the next path element
+	var operation yaml.Filter
+	var kind yaml.Kind
+	tag := yaml.NodeTagEmpty
+	switch {
+	case !fltr.FieldSpec.CreateIfNotPresent || fltr.CreateKind == 0 || isSeq:
+		// don't create the field if we don't find it
+		operation = yaml.Lookup(fieldName)
+		if isSeq {
+			// The query path thinks this field should be a sequence;
+			// accept this hint for use later if the tag is NodeTagNull.
+			kind = yaml.SequenceNode
+		}
+	case len(fltr.path) <= 1:
+		// create the field if it is missing: use the provided node kind
+		operation = yaml.LookupCreate(fltr.CreateKind, fieldName)
+		kind = fltr.CreateKind
+		tag = fltr.CreateTag
+	default:
+		// create the field if it is missing: must be a mapping node
+		operation = yaml.LookupCreate(yaml.MappingNode, fieldName)
+		kind = yaml.MappingNode
+		tag = yaml.NodeTagMap
+	}
+
+	// locate (or maybe create) the field
+	field, err := obj.Pipe(operation)
+	if err != nil {
+		return errors.WrapPrefixf(err, "fieldName: %s", fieldName)
+	}
+	if field == nil {
+		// No error if field not found.
+		return nil
+	}
+
+	// if the value exists, but is null and kind is set,
+	// then change it to the creation type
+	// TODO: update yaml.LookupCreate to support this
+	if field.YNode().Tag == yaml.NodeTagNull && yaml.IsCreate(kind) {
+		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 Filter) handleSequence(obj *yaml.RNode) error {
+	if err := obj.VisitElements(func(node *yaml.RNode) error {
+		// recurse on each element -- re-allocating a Filter 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) {
+	shorter := strings.TrimSuffix(name, "[]")
+	return shorter, shorter != name
+}
+
+// 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
+}

api/filters/fieldspec/fieldspec_test.go

@@ -0,0 +1,564 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fieldspec_test
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/api/filters/fieldspec"
+	"sigs.k8s.io/kustomize/api/filters/filtersutil"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+func TestFilter_Filter(t *testing.T) {
+	testCases := map[string]struct {
+		input     string
+		expected  string
+		filter    fieldspec.Filter
+		fieldSpec string
+		error     string
+	}{
+		"path not found": {
+			fieldSpec: `
+path: a/b
+group: foo
+kind: Bar
+`,
+			input: `
+apiVersion: foo
+kind: Bar
+xxx:
+`,
+			expected: `
+apiVersion: foo
+kind: Bar
+xxx:
+`,
+			filter: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+		"empty path": {
+			fieldSpec: `
+group: foo
+kind: Bar
+`,
+			input: `
+apiVersion: foo
+kind: Bar
+xxx:
+`,
+			expected: `
+apiVersion: foo
+kind: Bar
+xxx:
+`,
+			error: `considering field '' of object
+apiVersion: foo
+kind: Bar
+xxx:
+: cannot set or create an empty field name`,
+			filter: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"update": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"update-kind-not-match": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"update-group-not-match": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"update-version-not-match": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"bad-version": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"bad-meta": {
+			fieldSpec: `
+path: a/b
+group: foo
+version: v1beta1
+kind: Bar
+`,
+			input: `
+a:
+  b: c
+`,
+			filter: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+			error: "missing Resource metadata",
+		},
+
+		"miss-match-type": {
+			fieldSpec: `
+path: a/b/c
+kind: Bar
+`,
+			input: `
+kind: Bar
+a:
+  b: a
+`,
+			error: `considering field 'a/b/c' of object
+kind: Bar
+a:
+  b: a
+: expected sequence or mapping node`,
+			filter: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		"add": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("e"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"update-in-sequence": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue: filtersutil.SetScalar("e"),
+			},
+		},
+
+		// Don't create a sequence
+		"empty-sequence-no-create": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("e"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		// Create a new field for an element in a sequence
+		"empty-sequence-create": {
+			fieldSpec: `
+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: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("e"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"group v1": {
+			fieldSpec: `
+path: a/b
+group: v1
+create: true
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("e"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"version v1": {
+			fieldSpec: `
+path: a/b
+version: v1
+create: true
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+a:
+  b: e
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("e"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"successfully set field on array entry no sequence hint": {
+			fieldSpec: `
+path: spec/containers/image
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+  - image: foo
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+  - image: bar
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"successfully set field on array entry with sequence hint": {
+			fieldSpec: `
+path: spec/containers[]/image
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+  - image: foo
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+  - image: bar
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+		"failure to set field on array entry with sequence hint in path": {
+			fieldSpec: `
+path: spec/containers[]/image
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers: []
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+
+		"failure to set field on array entry, no sequence hint in path": {
+			fieldSpec: `
+path: spec/containers/image
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+spec:
+  containers:
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+		"fieldname with slash '/'": {
+			fieldSpec: `
+path: a/b\/c/d
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+a:
+  b/c:
+    d: foo
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+a:
+  b/c:
+    d: bar
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+		"fieldname with multiple '/'": {
+			fieldSpec: `
+path: a/b\/c/d\/e/f
+version: v1
+kind: Bar
+`,
+			input: `
+apiVersion: v1
+kind: Bar
+a:
+  b/c:
+    d/e:
+      f: foo
+`,
+			expected: `
+apiVersion: v1
+kind: Bar
+a:
+  b/c:
+    d/e:
+      f: bar
+`,
+			filter: fieldspec.Filter{
+				SetValue:   filtersutil.SetScalar("bar"),
+				CreateKind: yaml.ScalarNode,
+			},
+		},
+	}
+
+	for n := range testCases {
+		tc := testCases[n]
+		t.Run(n, func(t *testing.T) {
+			err := yaml.Unmarshal([]byte(tc.fieldSpec), &tc.filter.FieldSpec)
+			if !assert.NoError(t, err) {
+				t.FailNow()
+			}
+
+			out := &bytes.Buffer{}
+			rw := &kio.ByteReadWriter{
+				Reader:                bytes.NewBufferString(tc.input),
+				Writer:                out,
+				OmitReaderAnnotations: true,
+			}
+
+			// run the filter
+			err = kio.Pipeline{
+				Inputs:  []kio.Reader{rw},
+				Filters: []kio.Filter{kio.FilterAll(tc.filter)},
+				Outputs: []kio.Writer{rw},
+			}.Execute()
+			if tc.error != "" {
+				if !assert.EqualError(t, err, tc.error) {
+					t.FailNow()
+				}
+				// stop rest of test
+				return
+			}
+
+			if !assert.NoError(t, err) {
+				t.FailNow()
+			}
+
+			// check results
+			if !assert.Equal(t,
+				strings.TrimSpace(tc.expected),
+				strings.TrimSpace(out.String())) {
+				t.FailNow()
+			}
+		})
+	}
+}

api/filters/fieldspec/gvk.go

@@ -0,0 +1,49 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+package fieldspec
+
+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,
+	}
+}

api/filters/fieldspec/gvk_test.go

@@ -0,0 +1,156 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+package fieldspec
+
+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()
+			}
+		})
+	}
+}

api/filters/filtersutil/setters.go

@@ -0,0 +1,33 @@
+package filtersutil
+
+import (
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+// SetFn is a function that accepts an RNode to possibly modify.
+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.NodeTagString && 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),
+		})
+	}
+}

api/filters/fsslice/doc.go

@@ -0,0 +1,6 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package fsslice contains a yaml.Filter to modify a resource if
+// it matches one or more FieldSpec entries.
+package fsslice

api/filters/fsslice/example_test.go

@@ -0,0 +1,63 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fsslice_test
+
+import (
+	"bytes"
+	"log"
+	"os"
+
+	"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"
+)
+
+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:   filtersutil.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
+}

api/filters/fsslice/fsslice.go

@@ -0,0 +1,47 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fsslice
+
+import (
+	"sigs.k8s.io/kustomize/api/filters/fieldspec"
+	"sigs.k8s.io/kustomize/api/filters/filtersutil"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+var _ yaml.Filter = Filter{}
+
+// Filter ranges over an FsSlice to modify fields on a single object.
+// An FsSlice is a range of FieldSpecs. A FieldSpec is a GVK plus a path.
+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 filtersutil.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 := (&fieldspec.Filter{
+			FieldSpec:  fltr.FsSlice[i],
+			SetValue:   fltr.SetValue,
+			CreateKind: fltr.CreateKind,
+			CreateTag:  fltr.CreateTag,
+		}).Filter(obj)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return obj, nil
+}

api/filters/fsslice/fsslice_test.go

@@ -0,0 +1,121 @@
+// 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/filtersutil"
+	. "sigs.k8s.io/kustomize/api/filters/fsslice"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+type TestCase struct {
+	input    string
+	expected string
+	filter   Filter
+	fsSlice  string
+	error    string
+}
+
+var tests = map[string]TestCase{
+	"empty": {
+		fsSlice: `
+`,
+		input: `
+apiVersion: foo/v1
+kind: Bar
+`,
+		expected: `
+apiVersion: foo/v1
+kind: Bar
+`,
+		filter: Filter{
+			SetValue:   filtersutil.SetScalar("e"),
+			CreateKind: yaml.ScalarNode,
+		},
+	},
+	"two": {
+		fsSlice: `
+- path: a/b
+  group: foo
+  version: v1
+  create: true
+  kind: Bar
+- path: q/r[]/s/t
+  group: foo
+  version: v1
+  create: true
+  kind: Bar
+`,
+		input: `
+apiVersion: foo/v1
+kind: Bar
+q:
+  r:
+  - s: {}
+`,
+		expected: `
+apiVersion: foo/v1
+kind: Bar
+q:
+  r:
+  - s: {t: e}
+a:
+  b: e
+`,
+		filter: Filter{
+			SetValue:   filtersutil.SetScalar("e"),
+			CreateKind: yaml.ScalarNode,
+		},
+	},
+}
+
+func TestFilter(t *testing.T) {
+	for name := range tests {
+		test := tests[name]
+		t.Run(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()
+			}
+		})
+	}
+}

api/filters/imagetag/doc.go

@@ -0,0 +1,12 @@
+// 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

api/filters/imagetag/example_test.go

@@ -0,0 +1,126 @@
+// 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
+}

api/filters/imagetag/imagetag.go

@@ -0,0 +1,69 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package imagetag
+
+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"
+)
+
+// Filter modifies an "image tag", the value used to specify the
+// name, tag, version digest etc. of (docker) container images
+// used by a pod template.
+type Filter struct {
+	// imageTag is the tag we want to apply to the inputs
+	// The name of the image is used as a key, and other fields
+	// can specify a new name, tag, etc.
+	ImageTag types.Image `json:"imageTag,omitempty" yaml:"imageTag,omitempty"`
+
+	// FsSlice contains the FieldSpecs to locate an image field,
+	// e.g. Path: "spec/myContainers[]/image"
+	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) {
+	// FsSlice is an allowlist, not a denyList, so to deny
+	// something via configuration a new config mechanism is
+	// needed. Until then, hardcode it.
+	if f.isOnDenyList(node) {
+		return node, nil
+	}
+	if err := node.PipeE(fsslice.Filter{
+		FsSlice:  f.FsSlice,
+		SetValue: updateImageTagFn(f.ImageTag),
+	}); err != nil {
+		return nil, err
+	}
+	return node, nil
+}
+
+func (f Filter) isOnDenyList(node *yaml.RNode) bool {
+	meta, err := node.GetMeta()
+	if err != nil {
+		// A missing 'meta' field will cause problems elsewhere;
+		// ignore it here to keep the signature simple.
+		return false
+	}
+	// Ignore CRDs
+	// https://github.com/kubernetes-sigs/kustomize/issues/890
+	return meta.Kind == `CustomResourceDefinition`
+}
+
+func updateImageTagFn(imageTag types.Image) filtersutil.SetFn {
+	return func(node *yaml.RNode) error {
+		return node.PipeE(imageTagUpdater{
+			ImageTag: imageTag,
+		})
+	}
+}

api/filters/imagetag/imagetag_test.go

@@ -0,0 +1,674 @@
+// 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
+	}{
+		"ignore CustomResourceDefinition": {
+			input: `
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: whatever
+spec:
+  containers:
+  - image: whatever
+`,
+			expectedOutput: `
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: whatever
+spec:
+  containers:
+  - image: whatever
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:    "whatever",
+					NewName: "theImageShouldNotChangeInACrd",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/containers/image",
+				},
+			},
+		},
+
+		"legacy multiple images in 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: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "apache",
+					Digest:  "12345",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/containers/image",
+				},
+			},
+		},
+		"legacy 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: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "apache",
+					NewTag:  "3.2.1",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/containers/image",
+				},
+				{
+					Path: "spec/initContainers/image",
+				},
+			},
+		},
+		"legacy updates at 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: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "apache",
+					NewTag:  "3.2.1",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/containers/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers/image",
+				},
+			},
+		},
+		"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",
+				},
+			},
+		},
+
+		"new Tag": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx-tagged
+      - image: nginx:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx
+        name: nginx-notag
+      - image: nginx@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:v2
+        name: nginx-tagged
+      - image: nginx:v2
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx:v2
+        name: nginx-notag
+      - image: nginx:v2
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:   "nginx",
+					NewTag: "v2",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers[]/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers[]/image",
+				},
+			},
+		},
+		"newImage": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx-tagged
+      - image: nginx:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx
+        name: nginx-notag
+      - image: nginx@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: busybox:1.7.9
+        name: nginx-tagged
+      - image: busybox:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: busybox
+        name: nginx-notag
+      - image: busybox@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "busybox",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers[]/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers[]/image",
+				},
+			},
+		},
+		"newImageAndTag": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx-tagged
+      - image: nginx:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx
+        name: nginx-notag
+      - image: nginx@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: busybox:v3
+        name: nginx-tagged
+      - image: busybox:v3
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: busybox:v3
+        name: nginx-notag
+      - image: busybox:v3
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "busybox",
+					NewTag:  "v3",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers[]/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers[]/image",
+				},
+			},
+		},
+		"newDigest": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx-tagged
+      - image: nginx:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx
+        name: nginx-notag
+      - image: nginx@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx@sha256:222222222222222222
+        name: nginx-tagged
+      - image: nginx@sha256:222222222222222222
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx@sha256:222222222222222222
+        name: nginx-notag
+      - image: nginx@sha256:222222222222222222
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:   "nginx",
+					Digest: "sha256:222222222222222222",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers/image",
+				},
+			},
+		},
+		"newImageAndDigest": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: nginx:1.7.9
+        name: nginx-tagged
+      - image: nginx:latest
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: nginx
+        name: nginx-notag
+      - image: nginx@sha256:111111111111111111
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: busybox@sha256:222222222222222222
+        name: nginx-tagged
+      - image: busybox@sha256:222222222222222222
+        name: nginx-latest
+      - image: foobar:1
+        name: replaced-with-digest
+      - image: postgres:1.8.0
+        name: postgresdb
+      initContainers:
+      - image: busybox@sha256:222222222222222222
+        name: nginx-notag
+      - image: busybox@sha256:222222222222222222
+        name: nginx-sha256
+      - image: alpine:1.8.0
+        name: init-alpine
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:    "nginx",
+					NewName: "busybox",
+					Digest:  "sha256:222222222222222222",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers[]/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers[]/image",
+				},
+			},
+		},
+		"emptyContainers": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  containers:
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  containers: []
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:   "nginx",
+					NewTag: "v2",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/containers[]/image",
+					//					CreateIfNotPresent: true,
+				},
+			},
+		},
+		"tagWithBraces": {
+			input: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: some.registry.io/my-image:{GENERATED_TAG}
+        name: my-image
+`,
+			expectedOutput: `
+group: apps
+apiVersion: v1
+kind: Deployment
+metadata:
+  name: deploy1
+spec:
+  template:
+    spec:
+      containers:
+      - image: some.registry.io/my-image:my-fixed-tag
+        name: my-image
+`,
+			filter: Filter{
+				ImageTag: types.Image{
+					Name:   "some.registry.io/my-image",
+					NewTag: "my-fixed-tag",
+				},
+			},
+			fsSlice: []types.FieldSpec{
+				{
+					Path: "spec/template/spec/containers[]/image",
+				},
+				{
+					Path: "spec/template/spec/initContainers[]/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()
+			}
+		})
+	}
+}

api/filters/imagetag/legacy.go

@@ -0,0 +1,113 @@
+// 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,
+			})
+		})
+	}
+}

api/filters/imagetag/legacy_test.go

@@ -0,0 +1,136 @@
+// 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()
+			}
+		})
+	}
+}

api/filters/imagetag/updater.go

@@ -0,0 +1,43 @@
+// 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})
+}

api/filters/labels/doc.go

@@ -0,0 +1,6 @@
+// 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

api/filters/labels/example_test.go

@@ -0,0 +1,55 @@
+// 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
+}

api/filters/labels/labels.go

@@ -0,0 +1,45 @@
+// 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 := yaml.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: filtersutil.SetEntry(
+						k, f.Labels[k], yaml.NodeTagString),
+					CreateKind: yaml.MappingNode, // Labels are MappingNodes.
+					CreateTag:  yaml.NodeTagMap,
+				}); err != nil {
+					return nil, err
+				}
+			}
+			return node, nil
+		})).Filter(nodes)
+	return nodes, err
+}

api/filters/labels/labels_test.go

@@ -0,0 +1,413 @@
+// 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()
+			}
+		})
+	}
+}

api/filters/nameref/doc.go

@@ -0,0 +1,3 @@
+// Package nameref contains a kio.Filter implementation of the kustomize
+// name reference transformer.
+package nameref

api/filters/nameref/nameref.go

@@ -0,0 +1,396 @@
+package nameref
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+	"sigs.k8s.io/kustomize/api/filters/fieldspec"
+	"sigs.k8s.io/kustomize/api/resid"
+	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/api/resource"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+// Filter updates a name references.
+type Filter struct {
+	// Referrer refers to another resource X by X's name.
+	// E.g. A Deployment can refer to a ConfigMap.
+	// The Deployment is the Referrer,
+	// the ConfigMap is the ReferralTarget.
+	// This filter seeks to repair the reference in Deployment, given
+	// that the ConfigMap's name may have changed.
+	Referrer *resource.Resource
+
+	// NameFieldToUpdate is the field in the Referrer
+	// that holds the name requiring an update.
+	// This is the field to write.
+	NameFieldToUpdate types.FieldSpec
+
+	// ReferralTarget is the source of the new value for
+	// the name, always in the 'metadata/name' field.
+	// This is the field to read.
+	ReferralTarget resid.Gvk
+
+	// Set of resources to scan to find the ReferralTarget.
+	ReferralCandidates resmap.ResMap
+}
+
+// At time of writing, in practice this is called with a slice with only
+// one entry, the node also referred to be the resource in the Referrer field.
+func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
+	return kio.FilterAll(yaml.FilterFunc(f.run)).Filter(nodes)
+}
+
+// The node passed in here is the same node as held in Referrer;
+// that's how the referrer's name field is updated.
+// Currently, however, this filter still needs the extra methods on Referrer
+// to consult things like the resource Id, its namespace, etc.
+// TODO(3455): No filter should use the Resource api; all information
+// about names should come from annotations, with helper methods
+// on the RNode object.  Resource should get stupider, RNode smarter.
+func (f Filter) run(node *yaml.RNode) (*yaml.RNode, error) {
+	if err := f.confirmNodeMatchesReferrer(node); err != nil {
+		// sanity check.
+		return nil, err
+	}
+	if err := node.PipeE(fieldspec.Filter{
+		FieldSpec: f.NameFieldToUpdate,
+		SetValue:  f.set,
+	}); err != nil {
+		return nil, errors.Wrapf(
+			err, "updating name reference in '%s' field of '%s'",
+			f.NameFieldToUpdate.Path, f.Referrer.CurId().String())
+	}
+	return node, nil
+}
+
+// This function is called on the node found at FieldSpec.Path.
+// It's some node in the Referrer.
+func (f Filter) set(node *yaml.RNode) error {
+	if yaml.IsMissingOrNull(node) {
+		return nil
+	}
+	switch node.YNode().Kind {
+	case yaml.ScalarNode:
+		return f.setScalar(node)
+	case yaml.MappingNode:
+		return f.setMapping(node)
+	case yaml.SequenceNode:
+		return applyFilterToSeq(seqFilter{
+			setScalarFn:  f.setScalar,
+			setMappingFn: f.setMapping,
+		}, node)
+	default:
+		return fmt.Errorf("node must be a scalar, sequence or map")
+	}
+}
+
+// This method used when NameFieldToUpdate doesn't lead to
+// one scalar field (typically called 'name'), but rather
+// leads to a map field (called anything). In this case we
+// must complete the field path, looking for both  a 'name'
+// and a 'namespace' field to help select the proper
+// ReferralTarget to read the name and namespace from.
+func (f Filter) setMapping(node *yaml.RNode) error {
+	if node.YNode().Kind != yaml.MappingNode {
+		return fmt.Errorf("expect a mapping node")
+	}
+	nameNode, err := node.Pipe(yaml.FieldMatcher{Name: "name"})
+	if err != nil {
+		return errors.Wrap(err, "trying to match 'name' field")
+	}
+	if nameNode == nil {
+		// This is a _configuration_ error; the field path
+		// specified in NameFieldToUpdate.Path doesn't resolve
+		// to a map with a 'name' field, so we have no idea what
+		// field to update with a new name.
+		return fmt.Errorf("path config error; no 'name' field in node")
+	}
+	candidates, err := f.filterMapCandidatesByNamespace(node)
+	if err != nil {
+		return err
+	}
+	oldName := nameNode.YNode().Value
+	referral, err := f.selectReferral(oldName, candidates)
+	if err != nil || referral == nil {
+		// Nil referral means nothing to do.
+		return err
+	}
+	f.recordTheReferral(referral)
+	if referral.GetName() == oldName && referral.GetNamespace() == "" {
+		// The name has not changed, nothing to do.
+		return nil
+	}
+	if err = node.PipeE(yaml.FieldSetter{
+		Name:        "name",
+		StringValue: referral.GetName(),
+	}); err != nil {
+		return err
+	}
+	if referral.GetNamespace() == "" {
+		// Don't write an empty string into the namespace field, as
+		// it should not replace the value "default".  The empty
+		// string is handled as a wild card here, not as an implicit
+		// specification of the "default" k8s namespace.
+		return nil
+	}
+	return node.PipeE(yaml.FieldSetter{
+		Name:        "namespace",
+		StringValue: referral.GetNamespace(),
+	})
+}
+
+func (f Filter) filterMapCandidatesByNamespace(
+	node *yaml.RNode) ([]*resource.Resource, error) {
+	namespaceNode, err := node.Pipe(yaml.FieldMatcher{Name: "namespace"})
+	if err != nil {
+		return nil, errors.Wrap(err, "trying to match 'namespace' field")
+	}
+	if namespaceNode == nil {
+		return f.ReferralCandidates.Resources(), nil
+	}
+	namespace := namespaceNode.YNode().Value
+	nsMap := f.ReferralCandidates.GroupedByOriginalNamespace()
+	if candidates, ok := nsMap[namespace]; ok {
+		return candidates, nil
+	}
+	nsMap = f.ReferralCandidates.GroupedByCurrentNamespace()
+	// This could be nil, or an empty list.
+	return nsMap[namespace], nil
+}
+
+func (f Filter) setScalar(node *yaml.RNode) error {
+	referral, err := f.selectReferral(
+		node.YNode().Value, f.ReferralCandidates.Resources())
+	if err != nil || referral == nil {
+		// Nil referral means nothing to do.
+		return err
+	}
+	f.recordTheReferral(referral)
+	if referral.GetName() == node.YNode().Value {
+		// The name has not changed, nothing to do.
+		return nil
+	}
+	return node.PipeE(yaml.FieldSetter{StringValue: referral.GetName()})
+}
+
+// In the resource, make a note that it is referred to by the Referrer.
+func (f Filter) recordTheReferral(referral *resource.Resource) {
+	referral.AppendRefBy(f.Referrer.CurId())
+}
+
+// getRoleRefGvk returns a Gvk in the roleRef field. Return error
+// if the roleRef, roleRef/apiGroup or roleRef/kind is missing.
+func getRoleRefGvk(n *yaml.RNode) (*resid.Gvk, error) {
+	roleRef, err := n.Pipe(yaml.Lookup("roleRef"))
+	if err != nil {
+		return nil, err
+	}
+	if roleRef.IsNil() {
+		return nil, fmt.Errorf("roleRef cannot be found in %s", n.MustString())
+	}
+	apiGroup, err := roleRef.Pipe(yaml.Lookup("apiGroup"))
+	if err != nil {
+		return nil, err
+	}
+	if apiGroup.IsNil() {
+		return nil, fmt.Errorf(
+			"apiGroup cannot be found in roleRef %s", roleRef.MustString())
+	}
+	kind, err := roleRef.Pipe(yaml.Lookup("kind"))
+	if err != nil {
+		return nil, err
+	}
+	if kind.IsNil() {
+		return nil, fmt.Errorf(
+			"kind cannot be found in roleRef %s", roleRef.MustString())
+	}
+	return &resid.Gvk{
+		Group: apiGroup.YNode().Value,
+		Kind:  kind.YNode().Value,
+	}, nil
+}
+
+// sieveFunc returns true if the resource argument satisfies some criteria.
+type sieveFunc func(*resource.Resource) bool
+
+// doSieve uses a function to accept or ignore resources from a list.
+// If list is nil, returns immediately.
+// It's a filter obviously, but that term is overloaded here.
+func doSieve(list []*resource.Resource, fn sieveFunc) (s []*resource.Resource) {
+	for _, r := range list {
+		if fn(r) {
+			s = append(s, r)
+		}
+	}
+	return
+}
+
+func acceptAll(r *resource.Resource) bool {
+	return true
+}
+
+func previousNameMatches(name string) sieveFunc {
+	return func(r *resource.Resource) bool {
+		for _, id := range r.PrevIds() {
+			if id.Name == name {
+				return true
+			}
+		}
+		return false
+	}
+}
+
+func previousIdSelectedByGvk(gvk *resid.Gvk) sieveFunc {
+	return func(r *resource.Resource) bool {
+		for _, id := range r.PrevIds() {
+			if id.IsSelected(gvk) {
+				return true
+			}
+		}
+		return false
+	}
+}
+
+// If the we are updating a 'roleRef/name' field, the 'apiGroup' and 'kind'
+// fields in the same 'roleRef' map must be considered.
+// If either object is cluster-scoped (!IsNamespaceableKind), there
+// can be a referral.
+// E.g. a RoleBinding (which exists in a namespace) can refer
+// to a ClusterRole (cluster-scoped) object.
+// https://kubernetes.io/docs/reference/access-authn-authz/rbac/#role-and-clusterrole
+// Likewise, a ClusterRole can refer to a Secret (in a namespace).
+// Objects in different namespaces generally cannot refer to other
+// with some exceptions (e.g. RoleBinding and ServiceAccount are both
+// namespaceable, but the former can refer to accounts in other namespaces).
+func (f Filter) roleRefFilter() sieveFunc {
+	if !strings.HasSuffix(f.NameFieldToUpdate.Path, "roleRef/name") {
+		return acceptAll
+	}
+	roleRefGvk, err := getRoleRefGvk(f.Referrer.AsRNode())
+	if err != nil {
+		return acceptAll
+	}
+	return previousIdSelectedByGvk(roleRefGvk)
+}
+
+func prefixSuffixEquals(other resource.ResCtx) sieveFunc {
+	return func(r *resource.Resource) bool {
+		return r.PrefixesSuffixesEquals(other)
+	}
+}
+
+func (f Filter) sameCurrentNamespaceAsReferrer() sieveFunc {
+	referrerCurId := f.Referrer.CurId()
+	if !referrerCurId.IsNamespaceableKind() {
+		// If the referrer is cluster-scoped, let anything through.
+		return acceptAll
+	}
+	return func(r *resource.Resource) bool {
+		if !r.CurId().IsNamespaceableKind() {
+			// Allow cluster-scoped through.
+			return true
+		}
+		if r.GetKind() == "ServiceAccount" {
+			// Allow service accounts through, even though they
+			// are in a namespace.  A RoleBinding in another namespace
+			// can reference them.
+			return true
+		}
+		return referrerCurId.IsNsEquals(r.CurId())
+	}
+}
+
+// selectReferral picks the best referral from a list of candidates.
+func (f Filter) selectReferral(
+	// The name referral that may need to be updated.
+	oldName string,
+	candidates []*resource.Resource) (*resource.Resource, error) {
+	candidates = doSieve(candidates, previousNameMatches(oldName))
+	candidates = doSieve(candidates, previousIdSelectedByGvk(&f.ReferralTarget))
+	candidates = doSieve(candidates, f.roleRefFilter())
+	candidates = doSieve(candidates, f.sameCurrentNamespaceAsReferrer())
+	if len(candidates) == 1 {
+		return candidates[0], nil
+	}
+	candidates = doSieve(candidates, prefixSuffixEquals(f.Referrer))
+	if len(candidates) == 1 {
+		return candidates[0], nil
+	}
+	if len(candidates) == 0 {
+		return nil, nil
+	}
+	if allNamesAreTheSame(candidates) {
+		// Just take the first one.
+		return candidates[0], nil
+	}
+	ids := getIds(candidates)
+	f.failureDetails(candidates)
+	return nil, fmt.Errorf(" found multiple possible referrals: %s", ids)
+}
+
+func (f Filter) failureDetails(resources []*resource.Resource) {
+	fmt.Printf(
+		"\n**** Too many possible referral targets to referrer:\n%s\n",
+		f.Referrer.MustYaml())
+	for i, r := range resources {
+		fmt.Printf(
+			"--- possible referral %d:\n%s", i, r.MustYaml())
+		fmt.Println("------")
+	}
+}
+
+func allNamesAreTheSame(resources []*resource.Resource) bool {
+	name := resources[0].GetName()
+	for i := 1; i < len(resources); i++ {
+		if name != resources[i].GetName() {
+			return false
+		}
+	}
+	return true
+}
+
+func getIds(rs []*resource.Resource) string {
+	var result []string
+	for _, r := range rs {
+		result = append(result, r.CurId().String())
+	}
+	return strings.Join(result, ", ")
+}
+
+func checkEqual(k, a, b string) error {
+	if a != b {
+		return fmt.Errorf(
+			"node-referrerOriginal '%s' mismatch '%s' != '%s'",
+			k, a, b)
+	}
+	return nil
+}
+
+func (f Filter) confirmNodeMatchesReferrer(node *yaml.RNode) error {
+	meta, err := node.GetMeta()
+	if err != nil {
+		return err
+	}
+	gvk := f.Referrer.GetGvk()
+	if err = checkEqual(
+		"APIVersion", meta.APIVersion, gvk.ApiVersion()); err != nil {
+		return err
+	}
+	if err = checkEqual(
+		"Kind", meta.Kind, gvk.Kind); err != nil {
+		return err
+	}
+	if err = checkEqual(
+		"Name", meta.Name, f.Referrer.GetName()); err != nil {
+		return err
+	}
+	if err = checkEqual(
+		"Namespace", meta.Namespace, f.Referrer.GetNamespace()); err != nil {
+		return err
+	}
+	return nil
+}

api/filters/nameref/nameref_test.go

@@ -0,0 +1,789 @@
+package nameref
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/api/provider"
+	"sigs.k8s.io/kustomize/api/resid"
+	"sigs.k8s.io/kustomize/api/resmap"
+	filtertest_test "sigs.k8s.io/kustomize/api/testutils/filtertest"
+	"sigs.k8s.io/kustomize/api/types"
+)
+
+func TestNamerefFilter(t *testing.T) {
+	testCases := map[string]struct {
+		referrerOriginal string
+		candidates       string
+		referrerFinal    string
+		filter           Filter
+		originalNames    []string
+	}{
+		"simple scalar": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: NotSecret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "newName2"},
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: newName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+		"sequence": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+seq:
+- oldName1
+- oldName2
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: NotSecret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName1", "newName2"},
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+seq:
+- newName
+- oldName2
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "seq"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+		"mapping": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+map:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: NotSecret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "newName2"},
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+map:
+  name: newName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "map"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+		"mapping with namespace": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+  namespace: someNs
+map:
+  name: oldName
+  namespace: someNs
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+  namespace: someNs
+---
+apiVersion: apps/v1
+kind: NotSecret
+metadata:
+  name: newName2
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: thirdName
+`,
+			originalNames: []string{"oldName", "oldName", "oldName"},
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+  namespace: someNs
+map:
+  name: newName
+  namespace: someNs
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "map"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+		"null value": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+map:
+  name: null
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: NotSecret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "newName2"},
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+map:
+  name: null
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "map"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+	}
+
+	for tn, tc := range testCases {
+		t.Run(tn, func(t *testing.T) {
+			factory := provider.NewDefaultDepProvider().GetResourceFactory()
+			referrer, err := factory.FromBytes([]byte(tc.referrerOriginal))
+			if err != nil {
+				t.Fatal(err)
+			}
+			tc.filter.Referrer = referrer
+
+			resMapFactory := resmap.NewFactory(factory)
+			candidatesRes, err := factory.SliceFromBytesWithNames(
+				tc.originalNames, []byte(tc.candidates))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			candidates := resMapFactory.FromResourceSlice(candidatesRes)
+			tc.filter.ReferralCandidates = candidates
+
+			result := filtertest_test.RunFilter(t, tc.referrerOriginal, tc.filter)
+			if !assert.Equal(t,
+				strings.TrimSpace(tc.referrerFinal),
+				strings.TrimSpace(result)) {
+				t.FailNow()
+			}
+		})
+	}
+}
+
+func TestNamerefFilterUnhappy(t *testing.T) {
+	testCases := map[string]struct {
+		referrerOriginal string
+		candidates       string
+		referrerFinal    string
+		filter           Filter
+		originalNames    []string
+	}{
+		"multiple match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			referrerFinal: "",
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+		"no name": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  notName: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			referrerFinal: "",
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+		},
+	}
+
+	for tn, tc := range testCases {
+		t.Run(tn, func(t *testing.T) {
+			factory := provider.NewDefaultDepProvider().GetResourceFactory()
+			referrer, err := factory.FromBytes([]byte(tc.referrerOriginal))
+			if err != nil {
+				t.Fatal(err)
+			}
+			tc.filter.Referrer = referrer
+
+			resMapFactory := resmap.NewFactory(factory)
+			candidatesRes, err := factory.SliceFromBytesWithNames(
+				tc.originalNames, []byte(tc.candidates))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			candidates := resMapFactory.FromResourceSlice(candidatesRes)
+			tc.filter.ReferralCandidates = candidates
+
+			_, err = filtertest_test.RunFilterE(t, tc.referrerOriginal, tc.filter)
+			if err == nil {
+				t.Fatalf("expect an error")
+			}
+			if tc.referrerFinal != "" && !assert.EqualError(t, err, tc.referrerFinal) {
+				t.FailNow()
+			}
+		})
+	}
+}
+
+func TestCandidatesWithDifferentPrefixSuffix(t *testing.T) {
+	testCases := map[string]struct {
+		referrerOriginal string
+		candidates       string
+		referrerFinal    string
+		filter           Filter
+		originalNames    []string
+		prefix           []string
+		suffix           []string
+		inputPrefix      string
+		inputSuffix      string
+		err              bool
+	}{
+		"prefix match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix1", "prefix2"},
+			suffix:        []string{"", "suffix2"},
+			inputPrefix:   "prefix1",
+			inputSuffix:   "",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: newName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+		"suffix match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"", "prefix2"},
+			suffix:        []string{"suffix1", "suffix2"},
+			inputPrefix:   "",
+			inputSuffix:   "suffix1",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: newName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+		"prefix suffix both match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix1", "prefix2"},
+			suffix:        []string{"suffix1", "suffix2"},
+			inputPrefix:   "prefix1",
+			inputSuffix:   "suffix1",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: newName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+		"multiple match: both": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix", "prefix"},
+			suffix:        []string{"suffix", "suffix"},
+			inputPrefix:   "prefix",
+			inputSuffix:   "suffix",
+			referrerFinal: "",
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: true,
+		},
+		"multiple match: only prefix": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix", "prefix"},
+			suffix:        []string{"", ""},
+			inputPrefix:   "prefix",
+			inputSuffix:   "",
+			referrerFinal: "",
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: true,
+		},
+		"multiple match: only suffix": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"", ""},
+			suffix:        []string{"suffix", "suffix"},
+			inputPrefix:   "",
+			inputSuffix:   "suffix",
+			referrerFinal: "",
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: true,
+		},
+		"no match: neither match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix1", "prefix2"},
+			suffix:        []string{"suffix1", "suffix2"},
+			inputPrefix:   "prefix",
+			inputSuffix:   "suffix",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+		"no match: prefix doesn't match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix1", "prefix2"},
+			suffix:        []string{"suffix", "suffix"},
+			inputPrefix:   "prefix",
+			inputSuffix:   "suffix",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+		"no match: suffix doesn't match": {
+			referrerOriginal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			candidates: `
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName
+---
+apiVersion: apps/v1
+kind: Secret
+metadata:
+  name: newName2
+`,
+			originalNames: []string{"oldName", "oldName"},
+			prefix:        []string{"prefix", "prefix"},
+			suffix:        []string{"suffix1", "suffix2"},
+			inputPrefix:   "prefix",
+			inputSuffix:   "suffix",
+			referrerFinal: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dep
+ref:
+  name: oldName
+`,
+			filter: Filter{
+				NameFieldToUpdate: types.FieldSpec{Path: "ref/name"},
+				ReferralTarget: resid.Gvk{
+					Group:   "apps",
+					Version: "v1",
+					Kind:    "Secret",
+				},
+			},
+			err: false,
+		},
+	}
+
+	for tn, tc := range testCases {
+		t.Run(tn, func(t *testing.T) {
+			factory := provider.NewDefaultDepProvider().GetResourceFactory()
+			referrer, err := factory.FromBytes([]byte(tc.referrerOriginal))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if tc.inputPrefix != "" {
+				referrer.AddNamePrefix(tc.inputPrefix)
+			}
+			if tc.inputSuffix != "" {
+				referrer.AddNameSuffix(tc.inputSuffix)
+			}
+			tc.filter.Referrer = referrer
+
+			resMapFactory := resmap.NewFactory(factory)
+			candidatesRes, err := factory.SliceFromBytesWithNames(
+				tc.originalNames, []byte(tc.candidates))
+			if err != nil {
+				t.Fatal(err)
+			}
+			for i := range candidatesRes {
+				if tc.prefix[i] != "" {
+					candidatesRes[i].AddNamePrefix(tc.prefix[i])
+				}
+				if tc.suffix[i] != "" {
+					candidatesRes[i].AddNameSuffix(tc.suffix[i])
+				}
+			}
+
+			candidates := resMapFactory.FromResourceSlice(candidatesRes)
+			tc.filter.ReferralCandidates = candidates
+
+			if !tc.err {
+				if !assert.Equal(t,
+					strings.TrimSpace(tc.referrerFinal),
+					strings.TrimSpace(
+						filtertest_test.RunFilter(
+							t, tc.referrerOriginal, tc.filter))) {
+					t.FailNow()
+				}
+			} else {
+				_, err := filtertest_test.RunFilterE(
+					t, tc.referrerOriginal, tc.filter)
+				if err == nil {
+					t.Fatalf("an error is expected")
+				}
+			}
+		})
+	}
+}

api/filters/nameref/seqfilter.go

@@ -0,0 +1,57 @@
+package nameref
+
+import (
+	"fmt"
+
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+type setFn func(*yaml.RNode) error
+
+type seqFilter struct {
+	setScalarFn  setFn
+	setMappingFn setFn
+}
+
+func (sf seqFilter) Filter(node *yaml.RNode) (*yaml.RNode, error) {
+	if yaml.IsMissingOrNull(node) {
+		return node, nil
+	}
+	switch node.YNode().Kind {
+	case yaml.ScalarNode:
+		// Kind: Role/ClusterRole
+		// FieldSpec is rules.resourceNames
+		err := sf.setScalarFn(node)
+		return node, err
+	case yaml.MappingNode:
+		// 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
+		err := sf.setMappingFn(node)
+		return node, err
+	default:
+		return node, fmt.Errorf(
+			"%#v is expected to be either a string or a map of string", node)
+	}
+}
+
+// applyFilterToSeq will apply the filter to each element in the sequence node
+func applyFilterToSeq(filter yaml.Filter, node *yaml.RNode) error {
+	if node.YNode().Kind != yaml.SequenceNode {
+		return fmt.Errorf("expect a sequence node but got %v", node.YNode().Kind)
+	}
+
+	for _, elem := range node.Content() {
+		rnode := yaml.NewRNode(elem)
+		err := rnode.PipeE(filter)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

api/filters/nameref/seqfilter_test.go

@@ -0,0 +1,80 @@
+package nameref
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+func SeqFilter(node *yaml.RNode) (*yaml.RNode, error) {
+	if node.YNode().Value == "aaa" {
+		node.YNode().SetString("ccc")
+	}
+	return node, nil
+}
+
+func TestApplyFilterToSeq(t *testing.T) {
+	fltr := yaml.FilterFunc(SeqFilter)
+
+	testCases := map[string]struct {
+		input  string
+		expect string
+	}{
+		"replace in seq": {
+			input: `
+- aaa
+- bbb`,
+			expect: `
+- ccc
+- bbb`,
+		},
+	}
+
+	for tn, tc := range testCases {
+		t.Run(tn, func(t *testing.T) {
+			node, err := yaml.Parse(tc.input)
+			if err != nil {
+				t.Fatal(err)
+			}
+			err = applyFilterToSeq(fltr, node)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if !assert.Equal(t,
+				strings.TrimSpace(tc.expect),
+				strings.TrimSpace(node.MustString())) {
+				t.Fatalf("expect:\n%s\nactual:\n%s",
+					strings.TrimSpace(tc.expect),
+					strings.TrimSpace(node.MustString()))
+			}
+		})
+	}
+}
+
+func TestApplyFilterToSeqUnhappy(t *testing.T) {
+	fltr := yaml.FilterFunc(SeqFilter)
+
+	testCases := map[string]struct {
+		input string
+	}{
+		"replace in seq": {
+			input: `
+aaa`,
+		},
+	}
+
+	for tn, tc := range testCases {
+		t.Run(tn, func(t *testing.T) {
+			node, err := yaml.Parse(tc.input)
+			if err != nil {
+				t.Fatal(err)
+			}
+			err = applyFilterToSeq(fltr, node)
+			if err == nil {
+				t.Fatalf("expect an error")
+			}
+		})
+	}
+}

api/filters/namespace/doc.go

@@ -0,0 +1,9 @@
+// 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

api/filters/namespace/example_test.go

@@ -0,0 +1,50 @@
+// 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
+}

api/filters/namespace/namespace.go

@@ -0,0 +1,168 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package namespace
+
+import (
+	"sigs.k8s.io/kustomize/api/filters/fieldspec"
+	"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 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:   filtersutil.SetScalar(ns.Namespace),
+		CreateKind: yaml.ScalarNode, // Namespace is a ScalarNode
+		CreateTag:  yaml.NodeTagString,
+	})
+	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 hard-coded list 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 := fieldspec.GetGVK(meta)
+	if !gvk.IsNamespaceableKind() {
+		return nil
+	}
+	f := fsslice.Filter{
+		FsSlice: []types.FieldSpec{
+			{Path: types.MetadataNamespacePath, CreateIfNotPresent: true},
+		},
+		SetValue:   filtersutil.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.IsMissingOrNull(obj) {
+		return err
+	}
+
+	// add the namespace to each "subject" with name: default
+	err = obj.VisitElements(func(o *yaml.RNode) error {
+		// 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.IsMissingOrNull(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"
+)

api/filters/namespace/namespace_test.go

@@ -0,0 +1,311 @@
+// 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: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: default
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: default
+  namespace: foo
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: something
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: something
+  namespace: foo
+`,
+		expected: `
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: default
+  namespace: bar
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: default
+  namespace: bar
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+subjects:
+- name: something
+---
+apiVersion: rbac.authorization.k8s.io/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()
+			}
+		})
+	}
+}

api/filters/patchjson6902/doc.go

@@ -0,0 +1,6 @@
+// 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

api/filters/patchjson6902/example_test.go

@@ -0,0 +1,55 @@
+// 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
+}

api/filters/patchjson6902/patchjson6902.go

@@ -0,0 +1,65 @@
+// 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
+}

api/filters/patchjson6902/patchjson6902_test.go

@@ -0,0 +1,173 @@
+// 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()
+			}
+		})
+	}
+}

api/filters/patchstrategicmerge/doc.go

@@ -0,0 +1,6 @@
+// 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

api/filters/patchstrategicmerge/example_test.go

@@ -0,0 +1,49 @@
+// 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
+}

api/filters/patchstrategicmerge/patchstrategicmerge.go

@@ -0,0 +1,36 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+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{}
+
+// Filter does a strategic merge patch, which can delete nodes.
+func (pf Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
+	var result []*yaml.RNode
+	for i := range nodes {
+		r, err := merge2.Merge(
+			pf.Patch, nodes[i],
+			yaml.MergeOptions{
+				ListIncreaseDirection: yaml.MergeOptionsListPrepend,
+			},
+		)
+		if err != nil {
+			return nil, err
+		}
+		if r != nil {
+			result = append(result, r)
+		}
+	}
+	return result, nil
+}

api/filters/patchstrategicmerge/patchstrategicmerge_test.go

@@ -0,0 +1,749 @@
+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": {
+			input: `apiVersion: v1
+kind: Deployment
+metadata:
+  name: clown
+spec:
+  numReplicas: 1
+`,
+			patch: yaml.MustParse(`apiVersion: v1
+kind: Deployment
+metadata:
+  name: clown
+spec:
+  numReplicas: 999
+`),
+			expected: `apiVersion: v1
+kind: Deployment
+metadata:
+  name: clown
+spec:
+  numReplicas: 999
+`,
+		},
+		"nullMapEntry1": {
+			input: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    B:
+    C: Z
+`,
+			patch: yaml.MustParse(`
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    C: Z
+    D: W
+  baz:
+    hello: world
+`),
+			expected: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    C: Z
+    D: W
+  baz:
+    hello: world
+`,
+		},
+		"nullMapEntry2": {
+			input: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    C: Z
+    D: W
+  baz:
+    hello: world
+`,
+			patch: yaml.MustParse(`
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    B:
+    C: Z
+`),
+			expected: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+spec:
+  bar:
+    C: Z
+    D: W
+  baz:
+    hello: world
+`,
+		},
+		"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: foo0
+      - name: foo1
+      - name: foo2
+      - name: foo3
+`,
+		},
+		"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: foo0
+      - name: foo1
+      - name: foo2
+      - name: foo3
+`,
+		},
+		"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
+`,
+		},
+		"remove mapping - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+        $patch: delete   
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers: []
+`,
+		},
+		"replace mapping - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      $patch: replace
+      containers:
+      - name: new
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: new
+`,
+		},
+		"merge mapping - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test1
+        $patch: merge   
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test1
+`,
+		},
+		"remove list - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - whatever
+      - $patch: delete
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec: {}
+`,
+		},
+		"replace list - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: replace
+        image: replace
+      - $patch: replace   
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: replace
+        image: replace
+`,
+		},
+		"merge list - directive": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test
+        image: test
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test2
+        image: test2
+      - $patch: merge   
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myDeploy
+spec:
+  template:
+    spec:
+      containers:
+      - name: test2
+        image: test2
+      - name: test
+        image: test
+`,
+		},
+		"list map keys - add a port, no names": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: TCP
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: UDP
+       - containerPort: 80
+         protocol: UDP
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - image: test-image
+        name: test-deployment
+        ports:
+        - containerPort: 8080
+          protocol: UDP
+        - containerPort: 80
+          protocol: UDP
+        - containerPort: 8080
+          protocol: TCP
+`,
+		},
+		"list map keys - add name to port": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: UDP
+       - containerPort: 8080
+         protocol: TCP
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: UDP
+         name: UDP-name-patch
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - image: test-image
+        name: test-deployment
+        ports:
+        - containerPort: 8080
+          protocol: UDP
+          name: UDP-name-patch
+        - containerPort: 8080
+          protocol: TCP
+`,
+		},
+		"list map keys - replace port name": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: UDP
+         name: UDP-name-original
+       - containerPort: 8080
+         protocol: TCP
+         name: TCP-name-original
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+         protocol: UDP
+         name: UDP-name-patch
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - image: test-image
+        name: test-deployment
+        ports:
+        - containerPort: 8080
+          protocol: UDP
+          name: UDP-name-patch
+        - containerPort: 8080
+          protocol: TCP
+          name: TCP-name-original
+`,
+		},
+		"list map keys - add a port, no protocol": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 8080
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ name: test-deployment
+spec:
+ template:
+   spec:
+     containers:
+     - image: test-image
+       name: test-deployment
+       ports:
+       - containerPort: 80
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - image: test-image
+        name: test-deployment
+        ports:
+        - containerPort: 80
+        - containerPort: 8080
+`,
+		},
+
+		// Test for issue #3513
+		// Currently broken; when one port has only containerPort, the output
+		// should not merge containerPort 8301 together
+		// This occurs because when protocol is missing on the first port,
+		// the merge code uses [containerPort] as the merge key rather than
+		// [containerPort, protocol]
+		"list map keys - protocol only present on some ports": {
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: consul
+        image: "dashicorp/consul:1.9.1"
+        ports:
+        - containerPort: 8500
+          name: http
+        - containerPort: 8301
+          protocol: "TCP"
+        - containerPort: 8301
+          protocol: "UDP"
+`,
+			patch: yaml.MustParse(`
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+  labels:
+    test: label
+`),
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-deployment
+  labels:
+    test: label
+spec:
+  template:
+    spec:
+      containers:
+      - name: consul
+        image: "dashicorp/consul:1.9.1"
+        ports:
+        - containerPort: 8500
+          name: http
+        - containerPort: 8301
+          protocol: "TCP"
+        - containerPort: 8301
+          protocol: "UDP"
+`,
+		},
+	}
+
+	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()
+			}
+		})
+	}
+}

api/filters/prefixsuffix/doc.go

@@ -0,0 +1,6 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package prefixsuffix contains a kio.Filter implementation of the kustomize
+// PrefixSuffixTransformer.
+package prefixsuffix