Merge pull request #2258 from rhomel/api-0.3.3

increment api patch release to 0.3.3

.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:
-  - make verify-kustomize
-  - ./travis/kyaml-pre-commit.sh
-  - ./travis/check-go-mod.sh
-
-# TBD. Suppressing for now.
-notifications:
-  email: false

Makefile

@@ -21,7 +21,10 @@ verify-kustomize: \
 # https://github.com/kubernetes/test-infra/tree/master/config/jobs/kubernetes-sigs/kustomize
 .PHONY: prow-presubmit-check
 prow-presubmit-check: \
-	test-unit-kustomize-all
+	lint-kustomize \
+	test-unit-kustomize-all \
+	test-unit-cmd-all \
+	test-go-mod
 
 .PHONY: verify-kustomize-e2e
 verify-kustomize-e2e: test-examples-e2e-kustomize
@@ -203,6 +206,12 @@ test-unit-kustomize-all: \
 	test-unit-kustomize-cli \
 	test-unit-kustomize-plugins
 
+test-unit-cmd-all:
+	./travis/kyaml-pre-commit.sh
+
+test-go-mod:
+	./travis/check-go-mod.sh
+
 .PHONY:
 test-examples-kustomize-against-HEAD: $(MYGOBIN)/kustomize $(MYGOBIN)/mdrip
 	./hack/testExamplesAgainstKustomize.sh HEAD

api/builtins/ImageTagTransformer.go

@@ -144,8 +144,10 @@ func (p *ImageTagTransformerPlugin) findContainers(obj map[string]interface{}) e
 }
 
 func isImageMatched(s, t string) bool {
-	// Tag values are limited to [a-zA-Z0-9_.-].
-	pattern, _ := regexp.Compile("^" + t + "(@sha256)?(:[a-zA-Z0-9_.-]*)?$")
+	// Tag values are limited to [a-zA-Z0-9_.{}-].
+	// Some tools like Bazel rules_k8s allow tag patterns with {} characters.
+	// More info: https://github.com/bazelbuild/rules_k8s/pull/423
+	pattern, _ := regexp.Compile("^" + t + "(@sha256)?(:[a-zA-Z0-9_.{}-]*)?$")
 	return pattern.MatchString(s)
 }
 

api/resmap/resmap.go

@@ -114,7 +114,7 @@ type ResMap interface {
 	Append(*resource.Resource) error
 
 	// AppendAll appends another ResMap to self,
-	// failing on any OrgId collision.
+	// failing on any CurId collision.
 	AppendAll(ResMap) error
 
 	// AbsorbAll appends, replaces or merges the contents

cmd/config/ext/ext.go

@@ -0,0 +1,12 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package ext
+
+import "path/filepath"
+
+// GetOpenAPIFile returns the path to the file containing supplementary OpenAPI definitions.
+// Maybe be overridden to configure which file to read OpenAPI definitions from.
+var GetOpenAPIFile = func(args []string) (string, error) {
+	return filepath.Join(args[0], "kustomization"), nil
+}

cmd/config/go.mod

@@ -10,5 +10,7 @@ require (
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.4.0
 	k8s.io/apimachinery v0.17.0
-	sigs.k8s.io/kustomize/kyaml v0.0.12
+	sigs.k8s.io/kustomize/kyaml v0.0.0
 )
+
+replace sigs.k8s.io/kustomize/kyaml v0.0.0 => ../../kyaml

cmd/config/go.sum

@@ -156,15 +156,15 @@ gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20191026110619-0b21df46bc1d h1:LCPbGQ34PMrwad11aMZ+dbz5SAsq/0ySjRwQ8I9Qwd8=
-gopkg.in/yaml.v3 v3.0.0-20191026110619-0b21df46bc1d/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2 h1:XZx7nhd5GMaZpmDaEHFVafUZC7ya0fuo7cSJ3UCKYmM=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 k8s.io/apimachinery v0.17.0 h1:xRBnuie9rXcPxUkDizUsGvPf1cnlZCFu210op7J7LJo=
 k8s.io/apimachinery v0.17.0/go.mod h1:b9qmWdKlLuU9EBh+06BtLcSf/Mu89rWL33naRxs1uZg=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
 k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
-sigs.k8s.io/kustomize/kyaml v0.0.12 h1:5HFupVWGTHD4Tfu1+YL+A7oqUujySRkLiTeN1mACpc8=
-sigs.k8s.io/kustomize/kyaml v0.0.12/go.mod h1:tDOfJjL6slQVBLHJ76XfXAFgAOEdfm04AW2HehYOp8k=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

cmd/config/internal/commands/cmdcreatesetter.go

@@ -5,6 +5,7 @@ package commands
 
 import (
 	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
 	"sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/setters"
@@ -37,8 +38,7 @@ func NewCreateSetterRunner(parent string) *CreateSetterRunner {
 		"kind of the Resource on which to create the setter.")
 	set.Flags().MarkHidden("kind")
 	set.Flags().StringVar(&r.Set.SetPartialField.Type, "type", "",
-		"valid OpenAPI field type -- e.g. integer,boolean,string.")
-	set.Flags().MarkHidden("type")
+		"OpenAPI field type for the setter -- e.g. integer,boolean,string.")
 	set.Flags().BoolVar(&r.Set.SetPartialField.Partial, "partial", false,
 		"create a partial setter for only part of the field value.")
 	set.Flags().MarkHidden("partial")
@@ -85,9 +85,10 @@ func (r *CreateSetterRunner) preRunE(c *cobra.Command, args []string) error {
 	}
 	if setterVersion == "v2" {
 		var err error
-		r.OpenAPIFile, err = GetOpenAPIFile(args)
+		r.OpenAPIFile, err = ext.GetOpenAPIFile(args)
 		r.CreateSetter.Description = r.Set.SetPartialField.Description
 		r.CreateSetter.SetBy = r.Set.SetPartialField.SetBy
+		r.CreateSetter.Type = r.Set.SetPartialField.Type
 		if err != nil {
 			return err
 		}

cmd/config/internal/commands/cmdcreatesetter_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/commands"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 )
@@ -77,7 +78,9 @@ kind: Example
 			if !assert.NoError(t, err) {
 				t.FailNow()
 			}
-			commands.GetOpenAPIFile = func(args []string) (s string, err error) {
+			old := ext.GetOpenAPIFile
+			defer func() { ext.GetOpenAPIFile = old }()
+			ext.GetOpenAPIFile = func(args []string) (s string, err error) {
 				return f.Name(), nil
 			}
 

cmd/config/internal/commands/cmdcreatesubstitution.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/kyaml/errors"
 	"sigs.k8s.io/kustomize/kyaml/setters2"
 	"sigs.k8s.io/kustomize/kyaml/setters2/settersutil"
@@ -58,7 +59,7 @@ func (r *CreateSubstitutionRunner) preRunE(c *cobra.Command, args []string) erro
 		return err
 	}
 
-	r.OpenAPIFile, err = GetOpenAPIFile(args)
+	r.OpenAPIFile, err = ext.GetOpenAPIFile(args)
 	if err != nil {
 		return err
 	}

cmd/config/internal/commands/cmdcreatesubstitution_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/commands"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 )
@@ -101,6 +102,72 @@ spec:
         image: nginx:1.7.9 # {"$ref":"#/definitions/io.k8s.cli.substitutions.image"}
       - name: sidecar
         image: sidecar:1.7.9
+ `,
+		},
+		{
+			name: "substitution and create setters 1",
+			args: []string{
+				"image", "something/nginx::1.7.9/nginxotherthing", "--pattern", "something/IMAGE::TAG/nginxotherthing",
+				"--value", "IMAGE=image", "--value", "TAG=tag"},
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+      - name: nginx
+        image: something/nginx::1.7.9/nginxotherthing
+      - name: sidecar
+        image: sidecar:1.7.9
+ `,
+			inputOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+ `,
+			expectedOpenAPI: `
+apiVersion: v1alpha1
+kind: Example
+openAPI:
+  definitions:
+    io.k8s.cli.setters.image:
+      x-k8s-cli:
+        setter:
+          name: image
+          value: nginx
+    io.k8s.cli.setters.tag:
+      x-k8s-cli:
+        setter:
+          name: tag
+          value: 1.7.9
+    io.k8s.cli.substitutions.image:
+      x-k8s-cli:
+        substitution:
+          name: image
+          pattern: something/IMAGE::TAG/nginxotherthing
+          values:
+          - marker: IMAGE
+            ref: '#/definitions/io.k8s.cli.setters.image'
+          - marker: TAG
+            ref: '#/definitions/io.k8s.cli.setters.tag'
+ `,
+			expectedResources: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 3
+  template:
+    spec:
+      containers:
+      - name: nginx
+        image: something/nginx::1.7.9/nginxotherthing # {"$ref":"#/definitions/io.k8s.cli.substitutions.image"}
+      - name: sidecar
+        image: sidecar:1.7.9
  `,
 		},
 	}
@@ -120,7 +187,9 @@ spec:
 			if !assert.NoError(t, err) {
 				t.FailNow()
 			}
-			commands.GetOpenAPIFile = func(args []string) (s string, err error) {
+			old := ext.GetOpenAPIFile
+			defer func() { ext.GetOpenAPIFile = old }()
+			ext.GetOpenAPIFile = func(args []string) (s string, err error) {
 				return f.Name(), nil
 			}
 

cmd/config/internal/commands/cmdlistsetters.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/olekukonko/tablewriter"
 	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
 	"sigs.k8s.io/kustomize/kyaml/setters"
 	"sigs.k8s.io/kustomize/kyaml/setters2"
@@ -55,7 +56,7 @@ func (r *ListSettersRunner) preRunE(c *cobra.Command, args []string) error {
 func (r *ListSettersRunner) runE(c *cobra.Command, args []string) error {
 	if setterVersion == "v2" {
 		// use setters v2
-		path, err := GetOpenAPIFile(args)
+		path, err := ext.GetOpenAPIFile(args)
 		if err != nil {
 			return err
 		}

cmd/config/internal/commands/cmdlistsetters_test.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/commands"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 )
@@ -261,7 +262,9 @@ spec:
 				t.FailNow()
 			}
 			defer os.Remove(f.Name())
-			commands.GetOpenAPIFile = func(args []string) (s string, err error) {
+			old := ext.GetOpenAPIFile
+			defer func() { ext.GetOpenAPIFile = old }()
+			ext.GetOpenAPIFile = func(args []string) (s string, err error) {
 				err = ioutil.WriteFile(f.Name(), []byte(test.openapi), 0600)
 				if !assert.NoError(t, err) {
 					t.FailNow()

cmd/config/internal/commands/cmdset.go

@@ -6,10 +6,10 @@ package commands
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 
 	"github.com/olekukonko/tablewriter"
 	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/generateddocs/commands"
 	"sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/setters"
@@ -43,10 +43,6 @@ func NewSetRunner(parent string) *SetRunner {
 
 var setterVersion string
 
-var GetOpenAPIFile = func(args []string) (string, error) {
-	return filepath.Join(args[0], "kustomization"), nil
-}
-
 func SetCommand(parent string) *cobra.Command {
 	return NewSetRunner(parent).Command
 }
@@ -100,7 +96,7 @@ func (r *SetRunner) preRunE(c *cobra.Command, args []string) error {
 		r.Set.Value = args[2]
 		r.Set.Description = r.Perform.Description
 		r.Set.SetBy = r.Perform.SetBy
-		r.OpenAPIFile, err = GetOpenAPIFile(args)
+		r.OpenAPIFile, err = ext.GetOpenAPIFile(args)
 		if err != nil {
 			return err
 		}

cmd/config/internal/commands/cmdset_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/cmd/config/ext"
 	"sigs.k8s.io/kustomize/cmd/config/internal/commands"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 )
@@ -108,7 +109,6 @@ openAPI:
         setter:
           name: replicas
           value: "4"
-          setBy: me
  `,
 			expectedResources: `
 apiVersion: apps/v1
@@ -224,7 +224,9 @@ spec:
 			if !assert.NoError(t, err) {
 				t.FailNow()
 			}
-			commands.GetOpenAPIFile = func(args []string) (s string, err error) {
+			old := ext.GetOpenAPIFile
+			defer func() { ext.GetOpenAPIFile = old }()
+			ext.GetOpenAPIFile = func(args []string) (s string, err error) {
 				return f.Name(), nil
 			}
 

functions/examples/application-cr/LICENSE_TEMPLATE

@@ -0,0 +1,2 @@
+Copyright {{.Year}} {{.Holder}}
+SPDX-License-Identifier: Apache-2.0

functions/examples/application-cr/Makefile

@@ -0,0 +1,42 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+.PHONY: generate license fix vet fmt test build tidy image
+
+GOBIN := $(shell go env GOPATH)/bin
+
+build:
+	(cd image && go build -v -o $(GOBIN)/config-function .)
+
+all: generate license build fix vet fmt test lint tidy
+
+fix:
+	(cd image && go fix ./...)
+
+fmt:
+	(cd image && go fmt ./...)
+
+generate:
+	(which $(GOBIN)/mdtogo || go get sigs.k8s.io/kustomize/cmd/mdtogo)
+	(cd image && GOBIN=$(GOBIN) go generate ./...)
+
+license:
+	(which $(GOPATH)/bin/addlicense || go get github.com/google/addlicense)
+	$(GOPATH)/bin/addlicense  -y 2019 -c "The Kubernetes Authors." -f LICENSE_TEMPLATE .
+
+tidy:
+	(cd image && go mod tidy)
+
+lint:
+	(which $(GOBIN)/golangci-lint || go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.19.1)
+	(cd image && $(GOBIN)/golangci-lint run ./...)
+
+test:
+	(cd image && go test -cover ./...)
+
+vet:
+	(cd image && go vet ./...)
+
+image:
+	docker build image -t gcr.io/kustomize-functions/create-application:v0.1.0
+	docker push gcr.io/kustomize-functions/create-application:v0.1.0

functions/examples/application-cr/README.md

@@ -0,0 +1,30 @@
+# Append Application CR
+
+This is an example of appending an Application CR to a group of resources.
+
+This example is written in `go` and uses the `kyaml` libraries for parsing the
+input and writing the output.  Writing in `go` is not a requirement.
+
+## Function implementation
+
+The function is implemented as an [image](image), and built using `make image`.
+
+The template is implemented as a go program, which reads a collection of input
+Resource configuration, and looks for invalid configuration.
+
+## Function invocation
+
+The function is invoked by authoring a [local Resource](local-resource)
+with `metadata.annotations.[config.kubernetes.io/function]` and running:
+
+    kustomize config run local-resource/ --fn-path config/
+
+This exits non-zero if there is an error.
+
+## Running the Example
+
+Run the validator with:
+
+    kustomize config run local-resource/ --fn-path config/
+
+This will append an Application CR.  

functions/examples/application-cr/config/fn-config.yaml

@@ -0,0 +1,13 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+apiVersion: examples.config.kubernetes.io/v1beta1
+kind: CreateApp
+metadata:
+  annotations:
+    config.kubernetes.io/function: |
+      container:
+        image: gcr.io/kustomize-functions/create-application:v0.1.0
+spec:
+  managedBy: jingfang
+  name: example-app
+  namespace: example-namespace

functions/examples/application-cr/image/Dockerfile

@@ -0,0 +1,15 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+FROM golang:1.13-stretch
+ENV CGO_ENABLED=0
+WORKDIR /go/src/
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+COPY main.go .
+RUN go build -v -o /usr/local/bin/config-function ./
+
+FROM alpine:latest
+COPY --from=0 /usr/local/bin/config-function /usr/local/bin/config-function
+CMD ["config-function"]

functions/examples/application-cr/image/go.mod

@@ -0,0 +1,13 @@
+module sigs.k8s.io/kustomize/functions/examples/application-cr
+
+go 1.13
+
+require (
+	github.com/gogo/protobuf v1.3.1 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	golang.org/x/net v0.0.0-20200202094626-16171245cfb2 // indirect
+	k8s.io/apimachinery v0.17.2
+	sigs.k8s.io/application v0.8.2-0.20200228023238-a3b16d81fa81
+	sigs.k8s.io/kustomize/kyaml v0.1.1-0.20200227221838-a24cc4d305f4
+	sigs.k8s.io/yaml v1.1.0
+)

functions/examples/application-cr/image/go.sum

@@ -0,0 +1,520 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0 h1:ROfEUZz+Gh5pa62DJWXSaonyu3StP6EA6lPEXPI6mCo=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
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+k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
+k8s.io/utils v0.0.0-20190801114015-581e00157fb1/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
+k8s.io/utils v0.0.0-20191114184206-e782cd3c129f h1:GiPwtSzdP43eI1hpPCbROQCCIgCuiMMNF8YUVLF3vJo=
+k8s.io/utils v0.0.0-20191114184206-e782cd3c129f/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
+modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
+modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
+modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
+modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
+modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
+sigs.k8s.io/application v0.8.2-0.20200228023238-a3b16d81fa81 h1:UfB69/nuzg30T/EyejFxgIPHjKNbBmNL2rqOrtcV6Cs=
+sigs.k8s.io/application v0.8.2-0.20200228023238-a3b16d81fa81/go.mod h1:Mv+ht9RE/QNtITYCzRbt3XTIN6t6so6cInmiyg6wOIg=
+sigs.k8s.io/controller-runtime v0.4.0 h1:wATM6/m+3w8lj8FXNaO6Fs/rq/vqoOjO1Q116Z9NPsg=
+sigs.k8s.io/controller-runtime v0.4.0/go.mod h1:ApC79lpY3PHW9xj/w9pj+lYkLgwAAUZwfXkME1Lajns=
+sigs.k8s.io/kustomize/kyaml v0.1.1-0.20200227221838-a24cc4d305f4 h1:sAwSXsspJa7zmKAmrKlYpkdhoMjQUqA06SdBTvPL0S4=
+sigs.k8s.io/kustomize/kyaml v0.1.1-0.20200227221838-a24cc4d305f4/go.mod h1:/NdPPfrperSCGjm55cwEro1loBVtbtVIXSb7FguK6uk=
+sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
+sigs.k8s.io/structured-merge-diff v0.0.0-20190817042607-6149e4549fca/go.mod h1:IIgPezJWb76P0hotTxzDbWsMYB8APh18qZnxkomBpxA=
+sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18=
+sigs.k8s.io/testing_frameworks v0.1.2 h1:vK0+tvjF0BZ/RYFeZ1E6BYBwHJJXhjuZ3TdsEKH+UQM=
+sigs.k8s.io/testing_frameworks v0.1.2/go.mod h1:ToQrwSC3s8Xf/lADdZp3Mktcql9CG0UAmdJG9th5i0w=
+sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=

functions/examples/application-cr/image/main.go

@@ -0,0 +1,160 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package main implements adding an Application CR to a group of resources and
+// is run with `kustomize config run -- DIR/`.
+package main
+
+import (
+	"fmt"
+	"os"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/application/api/v1beta1"
+	yaml2 "sigs.k8s.io/yaml"
+
+	"sigs.k8s.io/kustomize/kyaml/kio"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+func appCR() error {
+	rw := &kio.ByteReadWriter{
+		Reader:                os.Stdin,
+		Writer:                os.Stdout,
+		OmitReaderAnnotations: true,
+		KeepReaderAnnotations: true,
+	}
+	p := kio.Pipeline{
+		Inputs:  []kio.Reader{rw}, // read the inputs into a slice
+		Filters: []kio.Filter{appCRFilter{rw: rw}},
+		Outputs: []kio.Writer{rw}, // copy the inputs to the output
+	}
+	if err := p.Execute(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	if err := appCR(); err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+}
+
+// appCRFilter implements kio.Filter
+type appCRFilter struct {
+	rw *kio.ByteReadWriter
+}
+
+// define the input API schema as a struct
+type API struct {
+	Spec struct {
+		ManagedBy string `yaml:"managedBy"`
+
+		Name string `yaml:"name"`
+
+		Namespace string `yaml:"namespace"`
+
+		Descriptor v1beta1.Descriptor `yaml:"descriptor,omitempty"`
+	} `yaml:"spec"`
+}
+
+// Filter checks each resource for validity, otherwise returning an error.
+func (f appCRFilter) Filter(in []*yaml.RNode) ([]*yaml.RNode, error) {
+	api := f.parseAPI()
+
+	groupKinds, err := getGroupKinds(in)
+	if err != nil {
+		return nil, err
+	}
+
+	app, err := addApplicationCR(api, groupKinds)
+	if err != nil {
+		return nil, err
+	}
+	err = addApplicationLabel(api.Spec.Name, in)
+	if err != nil {
+		return nil, err
+	}
+	if app != nil {
+		return append(in, app), nil
+	}
+	return in, nil
+
+}
+
+// parseAPI parses the functionConfig into an API struct.
+func (f *appCRFilter) parseAPI() API {
+	// parse the input function config -- TODO: simplify this
+	var api API
+	if err := yaml.Unmarshal([]byte(f.rw.FunctionConfig.MustString()), &api); err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+
+	return api
+}
+
+func getGroupKinds(in []*yaml.RNode) ([]metav1.GroupKind, error) {
+	var groupKinds []metav1.GroupKind
+	for _, r := range in {
+		meta, err := r.GetMeta()
+		if err != nil {
+			return nil, err
+		}
+		gvk := schema.FromAPIVersionAndKind(meta.APIVersion, meta.Kind)
+
+		found := false
+		for _, gk := range groupKinds {
+			if gk.Group == gvk.Group && gk.Kind == gvk.Kind {
+				break
+			}
+		}
+		if !found {
+			groupKinds = append(groupKinds, metav1.GroupKind{
+				Group: gvk.Group,
+				Kind:  gvk.Kind,
+			})
+		}
+	}
+	return groupKinds, nil
+}
+
+func addApplicationCR(api API, groupKinds []metav1.GroupKind) (*yaml.RNode, error) {
+	app := v1beta1.Application{
+		TypeMeta: metav1.TypeMeta{
+			APIVersion: "app.k8s.io/v1beta1",
+			Kind:       "Application",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace:   api.Spec.Namespace,
+			Name:        api.Spec.Name,
+			Labels:      map[string]string{"app.kubernetes.io/name": api.Spec.Name},
+			Annotations: map[string]string{"app.kubernetes.io/managed-by": api.Spec.ManagedBy},
+		},
+		Spec: v1beta1.ApplicationSpec{
+			ComponentGroupKinds: groupKinds,
+			Descriptor:          api.Spec.Descriptor,
+			Selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{"app.kubernetes.io/name": api.Spec.Name},
+			},
+		},
+	}
+
+	data, err := yaml2.Marshal(app)
+	if err != nil {
+		return nil, err
+	}
+	return yaml.Parse(string(data))
+}
+
+func addApplicationLabel(name string, in []*yaml.RNode) error {
+	for _, r := range in {
+		if _, err := r.Pipe(yaml.SetLabel("app.kubernetes.io/name", name)); err != nil {
+			return err
+		}
+	}
+	return nil
+}

functions/examples/application-cr/image/main_test.go

@@ -0,0 +1,251 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package main implements adding an Application CR to a group of resources and
+// is run with `kustomize config run -- DIR/`.
+package main
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+var input = `apiVersion: config.kubernetes.io/v1alpha1
+kind: ResourceList
+items:
+- apiVersion: v1
+  kind: ConfigMap
+  metadata:
+    name: the-map
+    annotations:
+      config.kubernetes.io/index: '0'
+      config.kubernetes.io/path: 'example.yaml'
+  data:
+    altGreeting: "Good Morning!"
+    enableRisky: "false"
+- apiVersion: apps/v1
+  kind: Deployment
+  metadata:
+    name: the-deployment
+    annotations:
+      config.kubernetes.io/index: '1'
+      config.kubernetes.io/path: 'example.yaml'
+  spec:
+    replicas: 3
+    template:
+      metadata:
+        labels:
+          deployment: hello
+      spec:
+        containers:
+        - name: the-container
+          image: monopole/hello:1
+          command: ["/hello", "--port=8080", "--enableRiskyFeature=$(ENABLE_RISKY)"]
+          ports:
+          - containerPort: 8080
+          env:
+          - name: ALT_GREETING
+            valueFrom:
+              configMapKeyRef:
+                name: the-map
+                key: altGreeting
+          - name: ENABLE_RISKY
+            valueFrom:
+              configMapKeyRef:
+                name: the-map
+                key: enableRisky
+- kind: Service
+  apiVersion: v1
+  metadata:
+    name: the-service
+    annotations:
+      config.kubernetes.io/index: '2'
+      config.kubernetes.io/path: 'example.yaml'
+  spec:
+    selector:
+      deployment: hello
+    type: LoadBalancer
+    ports:
+    - protocol: TCP
+      port: 8666
+      targetPort: 8080
+functionConfig:
+  # Copyright 2019 The Kubernetes Authors.
+  # SPDX-License-Identifier: Apache-2.0
+  apiVersion: examples.config.kubernetes.io/v1beta1
+  kind: CreateApp
+  spec:
+    managedBy: jingfang
+    name: example-app
+    namespace: example-namespace
+    descriptor:
+      links:
+      - description: About
+        url: https://worldpress.org/
+      - description: web server dashboard
+        url: https://metrics/internal/worldpress-01/web-app
+`
+
+var output = `apiVersion: config.kubernetes.io/v1alpha1
+kind: ResourceList
+items:
+- apiVersion: v1
+  kind: ConfigMap
+  metadata:
+    name: the-map
+    annotations:
+      config.kubernetes.io/index: '0'
+      config.kubernetes.io/path: 'example.yaml'
+    labels:
+      app.kubernetes.io/name: 'example-app'
+  data:
+    altGreeting: "Good Morning!"
+    enableRisky: "false"
+- apiVersion: apps/v1
+  kind: Deployment
+  metadata:
+    name: the-deployment
+    annotations:
+      config.kubernetes.io/index: '1'
+      config.kubernetes.io/path: 'example.yaml'
+    labels:
+      app.kubernetes.io/name: 'example-app'
+  spec:
+    replicas: 3
+    template:
+      metadata:
+        labels:
+          deployment: hello
+      spec:
+        containers:
+        - name: the-container
+          image: monopole/hello:1
+          command: ["/hello", "--port=8080", "--enableRiskyFeature=$(ENABLE_RISKY)"]
+          ports:
+          - containerPort: 8080
+          env:
+          - name: ALT_GREETING
+            valueFrom:
+              configMapKeyRef:
+                name: the-map
+                key: altGreeting
+          - name: ENABLE_RISKY
+            valueFrom:
+              configMapKeyRef:
+                name: the-map
+                key: enableRisky
+- kind: Service
+  apiVersion: v1
+  metadata:
+    name: the-service
+    annotations:
+      config.kubernetes.io/index: '2'
+      config.kubernetes.io/path: 'example.yaml'
+    labels:
+      app.kubernetes.io/name: 'example-app'
+  spec:
+    selector:
+      deployment: hello
+    type: LoadBalancer
+    ports:
+    - protocol: TCP
+      port: 8666
+      targetPort: 8080
+- apiVersion: app.k8s.io/v1beta1
+  kind: Application
+  metadata:
+    annotations:
+      app.kubernetes.io/managed-by: jingfang
+    creationTimestamp: null
+    labels:
+      app.kubernetes.io/name: example-app
+    name: example-app
+    namespace: example-namespace
+  spec:
+    componentKinds:
+    - group: ""
+      kind: ConfigMap
+    - group: apps
+      kind: Deployment
+    - group: ""
+      kind: Service
+    descriptor:
+      links:
+      - description: About
+        url: https://worldpress.org/
+      - description: web server dashboard
+        url: https://metrics/internal/worldpress-01/web-app
+    selector:
+      matchLabels:
+        app.kubernetes.io/name: example-app
+  status: {}
+functionConfig:
+  # Copyright 2019 The Kubernetes Authors.
+  # SPDX-License-Identifier: Apache-2.0
+  apiVersion: examples.config.kubernetes.io/v1beta1
+  kind: CreateApp
+  spec:
+    managedBy: jingfang
+    name: example-app
+    namespace: example-namespace
+    descriptor:
+      links:
+      - description: About
+        url: https://worldpress.org/
+      - description: web server dashboard
+        url: https://metrics/internal/worldpress-01/web-app
+`
+
+func Test(t *testing.T) {
+	oldStdin := os.Stdin
+	oldStdout := os.Stdout
+	defer func() {
+		os.Stdin = oldStdin
+		os.Stdout = oldStdout
+	}()
+	r, w, _ := os.Pipe()
+	os.Stdout = w
+
+	outC := make(chan string)
+	go func() {
+		var buf bytes.Buffer
+		_, err := io.Copy(&buf, r)
+		if err != nil {
+			outC <- ""
+		}
+		outC <- buf.String()
+	}()
+
+	tmpfile, err := ioutil.TempFile("", "test-input")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(tmpfile.Name()) // noerrcheck
+	if _, err := tmpfile.Write([]byte(input)); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := tmpfile.Seek(0, 0); err != nil {
+		t.Fatal(err)
+	}
+	os.Stdin = tmpfile
+
+	err = appCR()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := tmpfile.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := w.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	out := <-outC
+	if out != output {
+		t.Fatalf("expected %s\nbut got %s\n", output, out)
+	}
+}

functions/examples/application-cr/local-resource/example.yaml

@@ -0,0 +1,52 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+data:
+  altGreeting: "Good Morning!"
+  enableRisky: "false"
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: the-deployment
+spec:
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        deployment: hello
+    spec:
+      containers:
+        - name: the-container
+          image: monopole/hello:1
+          command: ["/hello", "--port=8080", "--enableRiskyFeature=$(ENABLE_RISKY)"]
+          ports:
+            - containerPort: 8080
+          env:
+            - name: ALT_GREETING
+              valueFrom:
+                configMapKeyRef:
+                  name: the-map
+                  key: altGreeting
+            - name: ENABLE_RISKY
+              valueFrom:
+                configMapKeyRef:
+                  name: the-map
+                  key: enableRisky
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: the-service
+spec:
+  selector:
+    deployment: hello
+  type: LoadBalancer
+  ports:
+    - protocol: TCP
+      port: 8666
+      targetPort: 8080

kyaml/fieldmeta/fieldmeta.go

@@ -5,6 +5,7 @@ package fieldmeta
 
 import (
 	"encoding/json"
+	"reflect"
 	"strconv"
 	"strings"
 
@@ -36,16 +37,29 @@ type PartialFieldSetter struct {
 	Value string `yaml:"value" json:"value"`
 }
 
+// IsEmpty returns true if the FieldMeta has any empty Schema
+func (fm *FieldMeta) IsEmpty() bool {
+	if fm == nil {
+		return true
+	}
+	return reflect.DeepEqual(fm.Schema, spec.Schema{})
+}
+
 // Read reads the FieldMeta from a node
 func (fm *FieldMeta) Read(n *yaml.RNode) error {
-	if n.YNode().LineComment != "" {
-		v := strings.TrimLeft(n.YNode().LineComment, "#")
+	// check for metadata on head and line comments
+	comments := []string{n.YNode().LineComment, n.YNode().HeadComment}
+	for _, c := range comments {
+		if c == "" {
+			continue
+		}
+		c := strings.TrimLeft(c, "#")
 		// if it doesn't Unmarshal that is fine, it means there is no metadata
 		// other comments are valid, they just don't parse
 
-		// TODO: consider most sophisticated parsing techniques similar to what is used
+		// TODO: consider more sophisticated parsing techniques similar to what is used
 		// for go struct tags.
-		if err := fm.Schema.UnmarshalJSON([]byte(v)); err != nil {
+		if err := fm.Schema.UnmarshalJSON([]byte(c)); err != nil {
 			// note: don't return an error if the comment isn't a fieldmeta struct
 			return nil
 		}

kyaml/go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/sergi/go-diff v1.1.0
 	github.com/stretchr/testify v1.4.0
 	github.com/xlab/treeprint v0.0.0-20181112141820-a009c3971eca
-	gopkg.in/yaml.v2 v2.2.4
-	gopkg.in/yaml.v3 v3.0.0-20191026110619-0b21df46bc1d
+	golang.org/x/net v0.0.0-20191004110552-13f9640d40b9 // indirect
+	gopkg.in/yaml.v2 v2.2.7
+	gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2
 )

kyaml/go.sum

@@ -39,18 +39,20 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 h1:k7pJ2yAPLPgbskkFdhRCsA77k2fySZ1zf2zCjvQCiIM=
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20191004110552-13f9640d40b9 h1:rjwSpXsdiK0dV8/Naq3kAw9ymfAeJIyd0upUIElB+lI=
+golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20191026110619-0b21df46bc1d h1:LCPbGQ34PMrwad11aMZ+dbz5SAsq/0ySjRwQ8I9Qwd8=
-gopkg.in/yaml.v3 v3.0.0-20191026110619-0b21df46bc1d/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2 h1:XZx7nhd5GMaZpmDaEHFVafUZC7ya0fuo7cSJ3UCKYmM=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

kyaml/openapi/openapi.go

@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"reflect"
 	"sync"
 
 	"github.com/go-openapi/spec"
@@ -32,6 +33,14 @@ type ResourceSchema struct {
 	Schema *spec.Schema
 }
 
+// IsEmpty returns true if the ResourceSchema is empty
+func (rs *ResourceSchema) IsEmpty() bool {
+	if rs == nil || rs.Schema == nil {
+		return true
+	}
+	return reflect.DeepEqual(*rs.Schema, spec.Schema{})
+}
+
 // SchemaForResourceType returns the Schema for the given Resource
 // TODO(pwittrock): create a version of this function that will return a schema
 // which can be used for duck-typed Resources -- e.g. contains common fields such
@@ -193,15 +202,15 @@ func SuppressBuiltInSchemaUse() {
 }
 
 // Elements returns the Schema for the elements of an array.
-func (r *ResourceSchema) Elements() *ResourceSchema {
+func (rs *ResourceSchema) Elements() *ResourceSchema {
 	// load the schema from swagger.json
 	initSchema()
 
-	if len(r.Schema.Type) != 1 || r.Schema.Type[0] != "array" {
+	if len(rs.Schema.Type) != 1 || rs.Schema.Type[0] != "array" {
 		// either not an array, or array has multiple types
 		return nil
 	}
-	s := *r.Schema.Items.Schema
+	s := *rs.Schema.Items.Schema
 	for s.Ref.String() != "" {
 		sc, e := Resolve(&s.Ref)
 		if e != nil {
@@ -219,8 +228,8 @@ const Elements = "[]"
 // Field is called.
 // If any Field or Elements call returns nil, then Lookup returns
 // nil immediately.
-func (r *ResourceSchema) Lookup(path ...string) *ResourceSchema {
-	s := r
+func (rs *ResourceSchema) Lookup(path ...string) *ResourceSchema {
+	s := rs
 	for _, p := range path {
 		if s == nil {
 			break
@@ -235,19 +244,19 @@ func (r *ResourceSchema) Lookup(path ...string) *ResourceSchema {
 }
 
 // Field returns the Schema for a field.
-func (r *ResourceSchema) Field(field string) *ResourceSchema {
+func (rs *ResourceSchema) Field(field string) *ResourceSchema {
 	// load the schema from swagger.json
 	initSchema()
 
 	// locate the Schema
-	s, found := r.Schema.Properties[field]
+	s, found := rs.Schema.Properties[field]
 	switch {
 	case found:
 		// no-op, continue with s as the schema
-	case r.Schema.AdditionalProperties != nil && r.Schema.AdditionalProperties.Schema != nil:
+	case rs.Schema.AdditionalProperties != nil && rs.Schema.AdditionalProperties.Schema != nil:
 		// map field type -- use Schema of the value
 		// (the key doesn't matter, they all have the same value type)
-		s = *r.Schema.AdditionalProperties.Schema
+		s = *rs.Schema.AdditionalProperties.Schema
 	default:
 		// no Schema found from either swagger.json or line comments
 		return nil
@@ -267,14 +276,14 @@ func (r *ResourceSchema) Field(field string) *ResourceSchema {
 }
 
 // PatchStrategyAndKey returns the patch strategy and merge key extensions
-func (r *ResourceSchema) PatchStrategyAndKey() (string, string) {
-	ps, found := r.Schema.Extensions[kubernetesPatchStrategyExtensionKey]
+func (rs *ResourceSchema) PatchStrategyAndKey() (string, string) {
+	ps, found := rs.Schema.Extensions[kubernetesPatchStrategyExtensionKey]
 	if !found {
 		// merge key and patch strategy must appear together
 		return "", ""
 	}
 
-	mk, found := r.Schema.Extensions[kubernetesMergeKeyExtensionKey]
+	mk, found := rs.Schema.Extensions[kubernetesMergeKeyExtensionKey]
 	if !found {
 		// merge key and patch strategy must appear together
 		return "", ""

kyaml/setters2/add.go

@@ -104,6 +104,17 @@ type SetterDefinition struct {
 
 	// Count is the number of fields set by this setter.
 	Count int `yaml:"count,omitempty"`
+
+	// Type is the type of the setter value.
+	Type string `yaml:"type,omitempty"`
+
+	// EnumValues is a map of possible setter values to actual field values.
+	// If EnumValues is specified, then the value set the by user 1) MUST
+	// be present in the enumValues map as a key, and 2) the map entry value
+	// MUST be used as the value to set in the configuration (rather than the key)
+	// Example -- may be used for t-shirt sizing values by allowing cpu to be
+	// set to small, medium or large, and then mapping these values to cpu values -- 0.5, 2, 8
+	EnumValues map[string]string `yaml:"enumValues,omitempty"`
 }
 
 func (sd SetterDefinition) AddToFile(path string) error {
@@ -127,6 +138,15 @@ func (sd SetterDefinition) Filter(object *yaml.RNode) (*yaml.RNode, error) {
 		sd.Description = ""
 	}
 
+	if sd.Type != "" {
+		err = def.PipeE(yaml.FieldSetter{Name: "type", StringValue: sd.Type})
+		if err != nil {
+			return nil, err
+		}
+		// don't write the type to the extension
+		sd.Type = ""
+	}
+
 	ext, err := def.Pipe(yaml.LookupCreate(yaml.MappingNode, K8sCliExtensionKey))
 	if err != nil {
 		return nil, err

kyaml/setters2/set.go

@@ -30,7 +30,7 @@ func (s *Set) Filter(object *yaml.RNode) (*yaml.RNode, error) {
 // visitScalar
 func (s *Set) visitScalar(object *yaml.RNode, p string) error {
 	// get the openAPI for this field describing how to apply the setter
-	ext, err := getExtFromComment(object)
+	ext, sch, err := getExtFromComment(object)
 	if err != nil {
 		return err
 	}
@@ -39,13 +39,13 @@ func (s *Set) visitScalar(object *yaml.RNode, p string) error {
 	}
 
 	// perform a direct set of the field if it matches
-	if s.set(object, ext) {
+	if s.set(object, ext, sch) {
 		s.Count++
 		return nil
 	}
 
 	// perform a substitution of the field if it matches
-	sub, err := s.substitute(object, ext)
+	sub, err := s.substitute(object, ext, sch)
 	if err != nil {
 		return err
 	}
@@ -57,7 +57,7 @@ func (s *Set) visitScalar(object *yaml.RNode, p string) error {
 
 // substitute updates the value of field from ext if ext contains a substitution that
 // depends on a setter whose name matches s.Name.
-func (s *Set) substitute(field *yaml.RNode, ext *cliExtension) (bool, error) {
+func (s *Set) substitute(field *yaml.RNode, ext *cliExtension, _ *spec.Schema) (bool, error) {
 	nameMatch := false
 
 	// check partial setters to see if they contain the setter as part of a
@@ -86,8 +86,15 @@ func (s *Set) substitute(field *yaml.RNode, ext *cliExtension) (bool, error) {
 		if err != nil {
 			return false, errors.Wrap(err)
 		}
-		// substitute the setters current value into the substitution pattern
-		p = strings.ReplaceAll(p, v.Marker, subSetter.Setter.Value)
+
+		if val, found := subSetter.Setter.EnumValues[subSetter.Setter.Value]; found {
+			// the setter has an enum-map.  we should replace the marker with the
+			// enum value looked up from the map rather than the enum key
+			p = strings.ReplaceAll(p, v.Marker, val)
+		} else {
+			// substitute the setters current value into the substitution pattern
+			p = strings.ReplaceAll(p, v.Marker, subSetter.Setter.Value)
+		}
 
 		if subSetter.Setter.Name == s.Name {
 			// the substitution depends on the specified setter
@@ -102,11 +109,15 @@ func (s *Set) substitute(field *yaml.RNode, ext *cliExtension) (bool, error) {
 	// TODO(pwittrock): validate the field value
 
 	field.YNode().Value = p
+
+	// substitutions are always strings
+	field.YNode().Tag = "!!str"
+
 	return true, nil
 }
 
 // set applies the value from ext to field if its name matches s.Name
-func (s *Set) set(field *yaml.RNode, ext *cliExtension) bool {
+func (s *Set) set(field *yaml.RNode, ext *cliExtension, sch *spec.Schema) bool {
 	// check full setter
 	if ext.Setter == nil || ext.Setter.Name != s.Name {
 		return false
@@ -114,8 +125,18 @@ func (s *Set) set(field *yaml.RNode, ext *cliExtension) bool {
 
 	// TODO(pwittrock): validate the field value
 
+	if val, found := ext.Setter.EnumValues[ext.Setter.Value]; found {
+		// the setter has an enum-map.  we should replace the marker with the
+		// enum value looked up from the map rather than the enum key
+		field.YNode().Value = val
+		return true
+	}
+
 	// this has a full setter, set its value
 	field.YNode().Value = ext.Setter.Value
+
+	// format the node so it is quoted if it is a string
+	yaml.FormatNonStringStyle(field.YNode(), *sch)
 	return true
 }
 
@@ -146,14 +167,50 @@ func (s SetOpenAPI) Filter(object *yaml.RNode) (*yaml.RNode, error) {
 	if def == nil {
 		return nil, errors.Errorf("no setter %s found", s.Name)
 	}
-	if err := def.PipeE(&yaml.FieldSetter{Name: "value", StringValue: s.Value}); err != nil {
+
+	// if the setter contains an enumValues map, then ensure the set value appears
+	// as a key in the map
+	if values, err := def.Pipe(yaml.Lookup("enumValues")); err != nil {
+		// error looking up the enumValues
+		return nil, err
+	} else if values != nil {
+		// contains enumValues map -- validate the set value against the map entries
+
+		// get the enumValues keys
+		fields, err := values.Fields()
+		if err != nil {
+			return nil, err
+		}
+
+		// search for the user provided value in the set of allowed values
+		var match bool
+		for i := range fields {
+			if fields[i] == s.Value {
+				// found a match, we are good
+				match = true
+				break
+			}
+		}
+		if !match {
+			// no match found -- provide an informative error to the user
+			return nil, errors.Errorf("%s does not match the possible values for %s: [%s]",
+				s.Value, s.Name, strings.Join(fields, ","))
+		}
+	}
+
+	v := yaml.NewScalarRNode(s.Value)
+	// values are always represented as strings the OpenAPI
+	// since the are unmarshalled into strings.  Use double quote style to
+	// ensure this consistently.
+	v.YNode().Tag = "!!str"
+	v.YNode().Style = yaml.DoubleQuotedStyle
+
+	if err := def.PipeE(&yaml.FieldSetter{Name: "value", Value: v}); err != nil {
 		return nil, err
 	}
 
-	if s.SetBy != "" {
-		if err := def.PipeE(&yaml.FieldSetter{Name: "setBy", StringValue: s.SetBy}); err != nil {
-			return nil, err
-		}
+	if err := def.PipeE(&yaml.FieldSetter{Name: "setBy", StringValue: s.SetBy}); err != nil {
+		return nil, err
 	}
 
 	if s.Description != "" {

kyaml/setters2/set_test.go

@@ -15,11 +15,12 @@ import (
 
 func TestSet_Filter(t *testing.T) {
 	var tests = []struct {
-		name     string
-		setter   string
-		openapi  string
-		input    string
-		expected string
+		name        string
+		description string
+		setter      string
+		openapi     string
+		input       string
+		expected    string
 	}{
 		{
 			name:   "set-replicas",
@@ -58,6 +59,184 @@ metadata:
   name: nginx-deployment
 spec:
   replicas: 4 # {"$ref": "#/definitions/io.k8s.cli.setters.replicas"}
+ `,
+		},
+		{
+			name:        "set-foo-type",
+			description: "if a type is specified for a setter, ensure the field is properly quoted",
+			setter:      "foo",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.foo:
+      x-k8s-cli:
+        setter:
+          name: foo
+          value: "4"
+      type: string
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: 3 # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: "4" # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+		},
+		{
+			name:        "set-foo-type-wrong",
+			description: "if a type is specified for a setter, for the field to the type",
+			setter:      "foo",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.foo:
+      x-k8s-cli:
+        setter:
+          name: foo
+          value: "4"
+      type: boolean
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: 3 # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: !!bool 4 # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+		},
+		{
+			name:        "set-foo-no-type",
+			description: "if a type is not specified for a setter, keep the existing quoting",
+			setter:      "foo",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.foo:
+      x-k8s-cli:
+        setter:
+          name: foo
+          value: "4"
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: 3 # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  annotations:
+    foo: 4 # {"$ref": "#/definitions/io.k8s.cli.setters.foo"}
+ `,
+		},
+		{
+			name:   "set-replicas-enum",
+			setter: "replicas",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "medium"
+          enumValues:
+            small: "1"
+            medium: "5"
+            large: "50"
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 1 # {"$ref": "#/definitions/io.k8s.cli.setters.replicas"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 5 # {"$ref": "#/definitions/io.k8s.cli.setters.replicas"}
+ `,
+		},
+		{
+			name:   "set-replicas-enum-large",
+			setter: "replicas",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "large"
+          enumValues:
+            small: "1"
+            medium: "5"
+            large: "50"
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 1 # {"$ref": "#/definitions/io.k8s.cli.setters.replicas"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  replicas: 50 # {"$ref": "#/definitions/io.k8s.cli.setters.replicas"}
  `,
 		},
 		{
@@ -155,6 +334,61 @@ spec:
       containers:
       - name: nginx
         image: nginx:1.8.1 # {"$ref": "#/definitions/io.k8s.cli.substitutions.image"}
+ `,
+		},
+		{
+			name:   "substitute-image-name-enum",
+			setter: "image-tag",
+			openapi: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.image-name:
+      x-k8s-cli:
+        setter:
+          name: image-name
+          value: "helloworld"
+          enumValues:
+            nginx: gcr.io/nginx
+            helloworld: us.gcr.io/helloworld
+    io.k8s.cli.setters.image-tag:
+      x-k8s-cli:
+        setter:
+          name: image-tag
+          value: "1.8.1"
+    io.k8s.cli.substitutions.image:
+      x-k8s-cli:
+        substitution:
+          name: image
+          pattern: IMAGE_NAME:IMAGE_TAG
+          values:
+          - marker: "IMAGE_NAME"
+            ref: "#/definitions/io.k8s.cli.setters.image-name"
+          - marker: "IMAGE_TAG"
+            ref: "#/definitions/io.k8s.cli.setters.image-tag"
+ `,
+			input: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9 # {"$ref": "#/definitions/io.k8s.cli.substitutions.image"}
+ `,
+			expected: `
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: nginx
+        image: us.gcr.io/helloworld:1.8.1 # {"$ref": "#/definitions/io.k8s.cli.substitutions.image"}
  `,
 		},
 		{
@@ -491,6 +725,29 @@ openAPI:
         setter:
           name: no-match-2
           value: "2"
+`,
+		},
+		{
+			name:   "set-annotation-quoted",
+			setter: "replicas",
+			value:  "3",
+			input: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: 4
+ `,
+			expected: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "3"
 `,
 		},
 		{
@@ -583,6 +840,137 @@ openAPI:
           value: "2"
 `,
 		},
+		{
+			name:   "set-replicas-set-by-empty",
+			setter: "replicas",
+			value:  "3",
+			input: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+          setBy: "package-default"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "4"
+          setBy: "package-default"
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+          setBy: "package-default"
+ `,
+			expected: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+          setBy: "package-default"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "3"
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+          setBy: "package-default"
+`,
+		},
+		{
+			name:   "set-replicas-with-enum",
+			setter: "replicas",
+			value:  "baz",
+			input: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+          setBy: "package-default"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "foo"
+          enumValues:
+            foo: bar
+            baz: biz
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+          setBy: "package-default"
+ `,
+			expected: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+          setBy: "package-default"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "baz"
+          enumValues:
+            foo: bar
+            baz: biz
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+          setBy: "package-default"
+`,
+		},
+		{
+			name:   "set-replicas-fail",
+			setter: "replicas",
+			value:  "hello",
+			input: `
+openAPI:
+  definitions:
+    io.k8s.cli.setters.no-match-1':
+      x-k8s-cli:
+        setter:
+          name: no-match-1
+          value: "1"
+          setBy: "package-default"
+    io.k8s.cli.setters.replicas:
+      x-k8s-cli:
+        setter:
+          name: replicas
+          value: "foo"
+          enumValues:
+            foo: bar
+            baz: biz
+    io.k8s.cli.setters.no-match-2':
+      x-k8s-cli:
+        setter:
+          name: no-match-2
+          value: "2"
+          setBy: "package-default"
+ `,
+			err: "hello does not match the possible values for replicas: [foo,baz]",
+		},
 		{
 			name:   "error",
 			setter: "replicas",

kyaml/setters2/settersutil/settercreator.go

@@ -19,6 +19,8 @@ type SetterCreator struct {
 
 	SetBy string
 
+	Type string
+
 	// FieldName if set will add the OpenAPI reference to fields with this name or path
 	// FieldName may be the full name of the field, full path to the field, or the path suffix.
 	// e.g. all of the following would match spec.template.spec.containers.image --
@@ -35,7 +37,9 @@ type SetterCreator struct {
 func (c SetterCreator) Create(openAPIPath, resourcesPath string) error {
 	// Update the OpenAPI definitions to hace the setter
 	sd := setters2.SetterDefinition{
-		Name: c.Name, Value: c.FieldValue, Description: c.Description, SetBy: c.SetBy}
+		Name: c.Name, Value: c.FieldValue, Description: c.Description, SetBy: c.SetBy,
+		Type: c.Type,
+	}
 	if err := sd.AddToFile(openAPIPath); err != nil {
 		return err
 	}

kyaml/setters2/settersutil/substitutioncreator.go

@@ -4,9 +4,13 @@
 package settersutil
 
 import (
+	"strings"
+
+	"sigs.k8s.io/kustomize/kyaml/errors"
 	"sigs.k8s.io/kustomize/kyaml/kio"
 	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/setters2"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
 // SubstitutionCreator creates or updates a substitution in the OpenAPI definitions, and
@@ -40,6 +44,12 @@ func (c SubstitutionCreator) Create(openAPIPath, resourcesPath string) error {
 		Values:  c.Values,
 		Pattern: c.Pattern,
 	}
+
+	err := c.CreateSettersForSubstitution(openAPIPath)
+	if err != nil {
+		return err
+	}
+
 	if err := d.AddToFile(openAPIPath); err != nil {
 		return err
 	}
@@ -62,3 +72,187 @@ func (c SubstitutionCreator) Create(openAPIPath, resourcesPath string) error {
 		Outputs: []kio.Writer{inout},
 	}.Execute()
 }
+
+// CreateSettersForSubstitution creates the setters for all the references in the substitution
+// values if they don't already exist in openAPIPath file.
+func (c SubstitutionCreator) CreateSettersForSubstitution(openAPIPath string) error {
+	y, err := yaml.ReadFile(openAPIPath)
+	if err != nil {
+		return err
+	}
+
+	m, err := c.GetValuesForMarkers()
+	if err != nil {
+		return err
+	}
+
+	// for each ref in values, check if the setter already exists, if not create them
+	for _, value := range c.Values {
+		obj, err := y.Pipe(yaml.Lookup(
+			// get the setter key from ref. Ex: from #/definitions/io.k8s.cli.setters.image_setter
+			// extract io.k8s.cli.setters.image_setter
+			"openAPI", "definitions", strings.TrimPrefix(value.Ref, "#/definitions/")))
+
+		if err != nil {
+			return err
+		}
+
+		if obj == nil {
+			sd := setters2.SetterDefinition{
+				// get the setter name from ref. Ex: from #/definitions/io.k8s.cli.setters.image_setter
+				// extract image_setter
+				Name:  strings.TrimPrefix(value.Ref, "#/definitions/io.k8s.cli.setters."),
+				Value: m[value.Marker],
+			}
+			err := sd.AddToFile(openAPIPath)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// GetValuesForMarkers parses the pattern and field value to derive values for the
+// markers in the pattern string. Returns error if the marker values can't be derived
+func (c SubstitutionCreator) GetValuesForMarkers() (map[string]string, error) {
+	m := make(map[string]string)
+	indices, err := c.GetStartIndices()
+	if err != nil {
+		return nil, err
+	}
+	fv := c.FieldValue
+	pattern := c.Pattern
+	fvInd := 0
+	patternInd := 0
+	// iterate fv, pattern with indices fvInd, patternInd respectively and when patternInd hits the index of a marker,
+	// freeze patternInd and iterate fvInd and capture string till we find the substring just after current marker
+	// and before next marker
+
+	// Ex: fv = "something/ubuntu:0.1.0", pattern = "something/IMAGE:VERSION", till patternInd reaches 10
+	// just proceed fvInd and patternInd and check if fv[fvInd]==pattern[patternInd] when patternInd is 10,
+	// freeze patternInd and move fvInd till it sees substring ':' which derives IMAGE = ubuntu and so on.
+	for fvInd < len(fv) && patternInd < len(pattern) {
+		// if we hit marker index, extract its corresponding value
+		if marker, ok := indices[patternInd]; ok {
+			// increment the patternInd to end of marker. This helps us to extract the substring before next marker.
+			patternInd += len(marker)
+			var value string
+			if value, fvInd, err = c.extractValueForMarker(fvInd, fv, patternInd, indices); err != nil {
+				return nil, err
+			}
+			// if marker is repeated in the pattern, make sure that the corresponding values
+			// are same and throw error if not.
+			if prevValue, ok := m[marker]; ok && prevValue != value {
+				return nil, errors.Errorf(
+					"marker %s is found to have different values %s and %s", marker, prevValue, value)
+			}
+			m[marker] = value
+		} else {
+			// Ex: fv = "samething/ubuntu:0.1.0" pattern = "something/IMAGE:VERSION". Error out at 'a' in fv.
+			if fv[fvInd] != pattern[patternInd] {
+				return nil, errors.Errorf(
+					"unable to derive values for markers, " +
+						"create setters for all markers and then try again")
+			}
+			fvInd++
+			patternInd++
+		}
+	}
+	// check if both strings are completely visited or throw error
+	if fvInd < len(fv) || patternInd < len(pattern) {
+		return nil, errors.Errorf(
+			"unable to derive values for markers, " +
+				"create setters for all markers and then try again")
+	}
+	return m, nil
+}
+
+// GetStartIndices returns the start indices of all the markers in the pattern
+func (c SubstitutionCreator) GetStartIndices() (map[int]string, error) {
+	indices := make(map[int]string)
+	for _, value := range c.Values {
+		found := false
+		for i := range c.Pattern {
+			if strings.HasPrefix(c.Pattern[i:], value.Marker) {
+				indices[i] = value.Marker
+				found = true
+			}
+		}
+		if !found {
+			return nil, errors.Errorf("unable to find marker " + value.Marker + " in the pattern")
+		}
+	}
+	if err := validateMarkers(indices); err != nil {
+		return nil, err
+	}
+	return indices, nil
+}
+
+// validateMarkers takes the indices map, checks if any of 2 markers not have delimiters,
+// checks if any marker is substring of other and returns error
+func validateMarkers(indices map[int]string) error {
+	for k1, v1 := range indices {
+		for k2, v2 := range indices {
+			if k1 != k2 && k1+len(v1) == k2 {
+				return errors.Errorf(
+					"markers %s and %s are found to have no delimiters between them,"+
+						" pre-create setters and try again", v1, v2)
+			}
+			if v1 != v2 && strings.Contains(v1, v2) {
+				return errors.Errorf(
+					"markers %s is substring of %s,"+
+						" no marker should be substring of other", v2, v1)
+			}
+		}
+	}
+	return nil
+}
+
+// extractValueForMarker returns the value string for a marker and the incremented index
+func (c SubstitutionCreator) extractValueForMarker(fvInd int, fv string, patternInd int, indices map[int]string) (string, int, error) {
+	nonMarkerStr := strTillNextMarker(indices, patternInd, c.Pattern)
+
+	// return the remaining string of fv till end if patternInd is at end of pattern
+	if patternInd == len(c.Pattern) {
+		return fv[fvInd:], len(fv), nil
+	}
+
+	// split remaining fv starting from fvInd with the non marker substring delimiter and get the first value
+	// In example fv = "something/ubuntu::0.1.0", pattern = "something/IMAGE::VERSION",
+	// split with "::" delimiter in fv which gives markerValue = ubuntu for marker IMAGE
+	// increment fvInd by length of extracted marker value and return fvInd
+	if markerValues := strings.Split(fv[fvInd:], nonMarkerStr); len(markerValues) > 0 {
+		return markerValues[0], fvInd + len(markerValues[0]), nil
+	}
+
+	return "", -1, errors.Errorf(
+		"unable to derive values for markers," +
+			" create setters for all markers and then try again")
+}
+
+// substrOfLen takes a string, start index and length and returns substring of given length
+// or till end of string
+func substrOfLen(str string, startInd int, length int) string {
+	return str[startInd:min(len(str), startInd+length)]
+}
+
+// strTillNextMarker takes in the indices map, a start index and returns the substring till
+// start of next marker
+func strTillNextMarker(indices map[int]string, startInd int, pattern string) string {
+	// initialize with max value which is length of pattern
+	nextMarkerStartInd := len(pattern)
+	for ind := range indices {
+		if ind > startInd {
+			nextMarkerStartInd = min(ind-startInd, nextMarkerStartInd)
+		}
+	}
+	return substrOfLen(pattern, startInd, nextMarkerStartInd)
+}
+
+func min(a int, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}

kyaml/setters2/settersutil/substitutioncreator_test.go

@@ -0,0 +1,111 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package settersutil
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/kustomize/kyaml/errors"
+	"sigs.k8s.io/kustomize/kyaml/setters2"
+)
+
+func TestGetValuesForMarkers(t *testing.T) {
+	var tests = []struct {
+		name           string
+		pattern        string
+		fieldValue     string
+		markers        []string
+		expectedError  error
+		expectedOutput map[string]string
+	}{
+		{
+			name:           "positive example",
+			markers:        []string{"IMAGE", "VERSION"},
+			pattern:        "something/IMAGE::VERSION/otherthing/IMAGE::VERSION/",
+			fieldValue:     "something/nginx::0.1.0/otherthing/nginx::0.1.0/",
+			expectedOutput: map[string]string{"IMAGE": "nginx", "VERSION": "0.1.0"},
+		},
+		{
+			name:          "marker with different values",
+			markers:       []string{"IMAGE", "VERSION"},
+			pattern:       "something/IMAGE:VERSION/IMAGE",
+			fieldValue:    "something/nginx:0.1.0/ubuntu",
+			expectedError: errors.Errorf("marker IMAGE is found to have different values nginx and ubuntu"),
+		},
+		{
+			name:          "unmatched pattern",
+			markers:       []string{"IMAGE", "VERSION"},
+			pattern:       "something/IMAGE:VERSION",
+			fieldValue:    "otherthing/nginx:0.1.0",
+			expectedError: errors.Errorf("unable to derive values for markers"),
+		},
+		{
+			name:          "unmatched pattern at the end",
+			markers:       []string{"IMAGE", "VERSION"},
+			pattern:       "something/IMAGE:VERSION/abc",
+			fieldValue:    "something/nginx:0.1.0/abcd",
+			expectedError: errors.Errorf("unable to derive values for markers"),
+		},
+		{
+			name:          "substring markers",
+			markers:       []string{"IMAGE", "VERSION", "MAGE"},
+			pattern:       "something/IMAGE:VERSION/abc/MAGE",
+			fieldValue:    "something/nginx:0.1.0/abc/ubuntu",
+			expectedError: errors.Errorf("no marker should be substring of other"),
+		},
+		{
+			name:          "markers with no delimiters",
+			markers:       []string{"IMAGE", "VERSION"},
+			pattern:       "something/IMAGEVERSION/",
+			fieldValue:    "something/nginx0.1.0/",
+			expectedError: errors.Errorf("no delimiters between them"),
+		},
+		{
+			name:          "unmatched delimiter",
+			markers:       []string{"IMAGE", "VERSION"},
+			pattern:       "something/IMAGE:^VERSION/otherthing/IMAGE::VERSION/",
+			fieldValue:    "something/nginx::0.1.0/otherthing/nginx::0.1.0/",
+			expectedError: errors.Errorf("unable to derive values for markers"),
+		},
+	}
+	for i := range tests {
+		test := tests[i]
+		t.Run(test.name, func(t *testing.T) {
+			values := []setters2.Value{}
+			for _, marker := range test.markers {
+				value := setters2.Value{
+					Marker: marker,
+				}
+				values = append(values, value)
+			}
+
+			sc := SubstitutionCreator{
+				Pattern:    test.pattern,
+				Values:     values,
+				FieldValue: test.fieldValue,
+			}
+
+			m, err := sc.GetValuesForMarkers()
+
+			if test.expectedError == nil {
+				// fail if expectedError is nil but actual error is not
+				if !assert.NoError(t, err) {
+					t.FailNow()
+				}
+				// check if all the expected markers and values are present in actual map
+				for k, v := range test.expectedOutput {
+					if val, ok := m[k]; ok {
+						assert.Equal(t, v, val)
+					} else {
+						t.FailNow()
+					}
+				}
+			} else {
+				//if expectedError is not nil, check for correctness of error message
+				assert.Contains(t, err.Error(), test.expectedError.Error())
+			}
+		})
+	}
+}

kyaml/setters2/types.go

@@ -19,8 +19,9 @@ type cliExtension struct {
 }
 
 type setter struct {
-	Name  string `yaml:"name,omitempty" json:"name,omitempty"`
-	Value string `yaml:"value,omitempty" json:"value,omitempty"`
+	Name       string            `yaml:"name,omitempty" json:"name,omitempty"`
+	Value      string            `yaml:"value,omitempty" json:"value,omitempty"`
+	EnumValues map[string]string `yaml:"enumValues,omitempty" json:"enumValues,omitempty"`
 }
 
 type substitution struct {
@@ -56,32 +57,32 @@ func getExtFromSchema(schema *spec.Schema) (*cliExtension, error) {
 
 // getExtFromComment returns the cliExtension openAPI extension if it is present as
 // a comment on the field.
-func getExtFromComment(object *yaml.RNode) (*cliExtension, error) {
+func getExtFromComment(object *yaml.RNode) (*cliExtension, *spec.Schema, error) {
 	// TODO(pwittrock): also use path to the field to get openapi, not just comments
 	// parse comment containing the extended openapi for this field
 	fm := fieldmeta.FieldMeta{}
 	if err := fm.Read(object); err != nil {
-		return nil, errors.Wrap(err)
+		return nil, nil, errors.Wrap(err)
 	}
 	if fm.Schema.Ref.String() == "" {
-		return nil, nil
+		return nil, nil, nil
 	}
 
 	// resolve the comment reference to the extended openapi definitions
 	r, err := openapi.Resolve(&fm.Schema.Ref)
 	if err != nil {
-		return nil, errors.Wrap(err)
+		return nil, nil, errors.Wrap(err)
 	}
 	if r == nil {
 		// no schema found
 		// TODO(pwittrock): should this be an error if it doesn't resolve?
-		return nil, nil
+		return nil, nil, nil
 	}
 
 	// get the cli extension from the openapi (contains setter information)
 	ext, err := getExtFromSchema(r)
 	if err != nil {
-		return nil, errors.Wrap(err)
+		return nil, nil, errors.Wrap(err)
 	}
-	return ext, nil
+	return ext, r, nil
 }

kyaml/yaml/filters.go

@@ -15,6 +15,7 @@ var Filters = map[string]func() Filter{
 	"AnnotationClearer": func() Filter { return &AnnotationClearer{} },
 	"AnnotationGetter":  func() Filter { return &AnnotationGetter{} },
 	"AnnotationSetter":  func() Filter { return &AnnotationSetter{} },
+	"LabelSetter":       func() Filter { return &LabelSetter{} },
 	"ElementAppender":   func() Filter { return &ElementAppender{} },
 	"ElementMatcher":    func() Filter { return &ElementMatcher{} },
 	"FieldClearer":      func() Filter { return &FieldClearer{} },

kyaml/yaml/kfns.go

@@ -68,3 +68,25 @@ func (g AnnotationGetter) Filter(rn *RNode) (*RNode, error) {
 func GetAnnotation(key string) AnnotationGetter {
 	return AnnotationGetter{Key: key}
 }
+
+// LabelSetter sets a label at metadata.labels.
+// Creates metadata.labels if does not exist.
+type LabelSetter struct {
+	Kind  string `yaml:"kind,omitempty"`
+	Key   string `yaml:"key,omitempty"`
+	Value string `yaml:"value,omitempty"`
+}
+
+func (s LabelSetter) Filter(rn *RNode) (*RNode, error) {
+	// some tools get confused about the type if labels are not quoted
+	v := NewScalarRNode(s.Value)
+	v.YNode().Tag = "!!str"
+	v.YNode().Style = yaml.SingleQuotedStyle
+	return rn.Pipe(
+		PathGetter{Path: []string{"metadata", "labels"}, Create: yaml.MappingNode},
+		FieldSetter{Name: s.Key, Value: v})
+}
+
+func SetLabel(key, value string) LabelSetter {
+	return LabelSetter{Key: key, Value: value}
+}

kyaml/yaml/kfns_test.go

@@ -0,0 +1,63 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package yaml
+
+import (
+	"testing"
+)
+
+var input = `apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+data:
+  altGreeting: "Good Morning!"
+  enableRisky: "false"
+`
+
+func TestSetLabel(t *testing.T) {
+	rn := MustParse(input)
+	_, err := rn.Pipe(SetLabel("foo", "bar"))
+	if err != nil {
+		t.Fatalf("unexpected error %v", err)
+	}
+	output := rn.MustString()
+
+	expected := `apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+  labels:
+    foo: 'bar'
+data:
+  altGreeting: "Good Morning!"
+  enableRisky: "false"
+`
+	if output != expected {
+		t.Fatalf("expected \n%s\nbut got \n%s\n", expected, output)
+	}
+}
+
+func TestAnnotation(t *testing.T) {
+	rn := MustParse(input)
+	_, err := rn.Pipe(SetAnnotation("foo", "bar"))
+	if err != nil {
+		t.Fatalf("unexpected error %v", err)
+	}
+	output := rn.MustString()
+
+	expected := `apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: the-map
+  annotations:
+    foo: 'bar'
+data:
+  altGreeting: "Good Morning!"
+  enableRisky: "false"
+`
+	if output != expected {
+		t.Fatalf("expected \n%s\nbut got \n%s\n", expected, output)
+	}
+}

kyaml/yaml/merge2/element_test.go

@@ -4,251 +4,461 @@
 package merge2_test
 
 var elementTestCases = []testCase{
-	{`merge Element -- keep field in dest`,
-		`
+	{description: `merge Element -- keep field in dest`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v0
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v0
+        command: ['run.sh']
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
 	},
 
-	{`merge Element -- add field to dest`,
-		`
+	{description: `merge Element -- add field to dest`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v0
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v0
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
 	},
 
-	{`merge Element -- add list, empty in dest`,
-		`
+	{description: `merge Element -- add list, empty in dest`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items: []
+spec:
+  template:
+    spec:
+      containers: []
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
 	},
 
-	{`merge Element -- add list, missing from dest`,
-		`
+	{description: `merge Element -- add list, missing from dest`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-  command: ['run.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+        command: ['run.sh']
 `,
 	},
 
-	{`merge Element -- add Element first`,
-		`
+	{description: `merge Element -- add Element first`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
-- name: foo
-  image: foo:v1
+spec:
+  template:
+    spec:
+      containers:
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
+      - name: foo
+        image: foo:v1
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v0
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v0
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
 	},
 
-	{`merge Element -- add Element second`,
-		`
+	{description: `merge Element -- add Element second`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v0
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v0
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
 	},
 
 	//
 	// Test Case
 	//
-	{`keep list -- list missing from src`,
-		`
+	{description: `keep list -- list missing from src`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
 	},
 
 	//
 	// Test Case
 	//
-	{`keep Element -- element missing in src`,
-		`
+	{description: `keep Element -- element missing in src`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v0
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v0
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
 	},
 
 	//
 	// Test Case
 	//
-	{`keep element -- empty list in src`,
-		`
+	{description: `keep element -- empty list in src`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items: {}
+spec:
+  template:
+    spec:
+      containers: {}
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
-		`
+		expected: `
+apiVersion: apps/v1
 kind: Deployment
-items:
-- name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
-  command: ['run2.sh']
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
 `,
 	},
 
 	//
 	// Test Case
 	//
-	{`remove Element -- null in src`,
-		`
+	{description: `remove Element -- null in src`,
+		source: `
+apiVersion: apps/v1
 kind: Deployment
-items: null
+spec:
+  template:
+    spec:
+      containers: null
 `,
-		`
+		dest: `
+apiVersion: apps/v1
 kind: Deployment
-items:
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:v1
+      - name: bar
+        image: bar:v1
+        command: ['run2.sh']
+`,
+		expected: `
+apiVersion: apps/v1
+kind: Deployment
+spec:
+  template:
+    spec: {}
+`,
+	},
+
+	//
+	// Test Case
+	//
+	{description: `infer merge keys merge'`,
+		source: `
+apiVersion: custom
+kind: Deployment
+containers:
 - name: foo
-  image: foo:v1
-- name: bar
-  image: bar:v1
   command: ['run2.sh']
 `,
-		`
+		dest: `
+apiVersion: custom
 kind: Deployment
+containers:
+- name: foo
+  image: foo:bar
 `,
+		expected: `
+apiVersion: custom
+kind: Deployment
+containers:
+- name: foo
+  image: foo:bar
+  command: ['run2.sh']
+`,
+		infer: true,
+	},
+
+	//
+	// Test Case
+	//
+	{description: `no infer merge keys merge using schema`,
+		source: `
+apiVersion: apps/v1
+kind: Deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        command: ['run2.sh']
+`,
+		dest: `
+apiVersion: apps/v1
+kind: Deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:bar
+`,
+		expected: `
+apiVersion: apps/v1
+kind: Deployment
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: foo:bar
+        command: ['run2.sh']
+`,
+		infer: false,
+	},
+
+	//
+	// Test Case
+	//
+	{description: `no infer merge keys merge using explicit schema as line comment'`,
+		source: `
+apiVersion: custom
+kind: Deployment
+containers:
+- name: foo
+  command: ['run2.sh']
+`,
+		dest: `
+apiVersion: custom
+kind: Deployment
+containers: # {"items":{"$ref": "#/definitions/io.k8s.api.core.v1.Container"},"type":"array","x-kubernetes-patch-merge-key":"name","x-kubernetes-patch-strategy": "merge"}
+- name: foo # hell ow
+  image: foo:bar
+`,
+		expected: `
+apiVersion: custom
+kind: Deployment
+containers: # {"items":{"$ref": "#/definitions/io.k8s.api.core.v1.Container"},"type":"array","x-kubernetes-patch-merge-key":"name","x-kubernetes-patch-strategy": "merge"}
+- name: foo
+  image: foo:bar
+  command: ['run2.sh']
+`,
+		infer: false,
 	},
 }

kyaml/yaml/merge2/list_test.go

@@ -4,21 +4,21 @@
 package merge2_test
 
 var listTestCases = []testCase{
-	{`replace List -- different value in dest`,
-		`
+	{description: `replace List -- different value in dest`,
+		source: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		dest: `
 kind: Deployment
 items:
 - 0
 - 1
 `,
-		`
+		expected: `
 kind: Deployment
 items:
 - 1
@@ -27,18 +27,18 @@ items:
 `,
 	},
 
-	{`replace List -- missing from dest`,
-		`
+	{description: `replace List -- missing from dest`,
+		source: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		dest: `
 kind: Deployment
 `,
-		`
+		expected: `
 kind: Deployment
 items:
 - 1
@@ -50,22 +50,22 @@ items:
 	//
 	// Test Case
 	//
-	{`keep List -- same value in src and dest`,
-		`
+	{description: `keep List -- same value in src and dest`,
+		source: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		dest: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		expected: `
 kind: Deployment
 items:
 - 1
@@ -77,18 +77,18 @@ items:
 	//
 	// Test Case
 	//
-	{`keep List -- unspecified in src`,
-		`
+	{description: `keep List -- unspecified in src`,
+		source: `
 kind: Deployment
 `,
-		`
+		dest: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		expected: `
 kind: Deployment
 items:
 - 1
@@ -100,19 +100,19 @@ items:
 	//
 	// Test Case
 	//
-	{`remove List -- null in src`,
-		`
+	{description: `remove List -- null in src`,
+		source: `
 kind: Deployment
 items: null
 `,
-		`
+		dest: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		expected: `
 kind: Deployment
 `,
 	},
@@ -120,19 +120,19 @@ kind: Deployment
 	//
 	// Test Case
 	//
-	{`remove list -- empty in src`,
-		`
+	{description: `remove list -- empty in src`,
+		source: `
 kind: Deployment
 items: {}
 `,
-		`
+		dest: `
 kind: Deployment
 items:
 - 1
 - 2
 - 3
 `,
-		`
+		expected: `
 kind: Deployment
 items: {}
 `,

kyaml/yaml/merge2/map_test.go

@@ -4,19 +4,19 @@
 package merge2_test
 
 var mapTestCases = []testCase{
-	{`merge Map -- update field in dest`,
-		`
+	{description: `merge Map -- update field in dest`,
+		source: `
 kind: Deployment
 spec:
   foo: bar1
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar0
   baz: buz
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -24,19 +24,19 @@ spec:
 `,
 	},
 
-	{`merge Map -- add field to dest`,
-		`
+	{description: `merge Map -- add field to dest`,
+		source: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar0
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -44,18 +44,18 @@ spec:
 `,
 	},
 
-	{`merge Map -- add list, empty in dest`,
-		`
+	{description: `merge Map -- add list, empty in dest`,
+		source: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		dest: `
 kind: Deployment
 spec: {}
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -63,17 +63,17 @@ spec:
 `,
 	},
 
-	{`merge Map -- add list, missing from dest`,
-		`
+	{description: `merge Map -- add list, missing from dest`,
+		source: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		dest: `
 kind: Deployment
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -81,19 +81,19 @@ spec:
 `,
 	},
 
-	{`merge Map -- add Map first`,
-		`
+	{description: `merge Map -- add Map first`,
+		source: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar1
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -101,19 +101,19 @@ spec:
 `,
 	},
 
-	{`merge Map -- add Map second`,
-		`
+	{description: `merge Map -- add Map second`,
+		source: `
 kind: Deployment
 spec:
   baz: buz
   foo: bar1
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar1
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -124,17 +124,17 @@ spec:
 	//
 	// Test Case
 	//
-	{`keep map -- map missing from src`,
-		`
+	{description: `keep map -- map missing from src`,
+		source: `
 kind: Deployment
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -145,18 +145,18 @@ spec:
 	//
 	// Test Case
 	//
-	{`keep map -- empty list in src`,
-		`
+	{description: `keep map -- empty list in src`,
+		source: `
 kind: Deployment
 items: {}
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		expected: `
 kind: Deployment
 spec:
   foo: bar1
@@ -168,18 +168,18 @@ items: {}
 	//
 	// Test Case
 	//
-	{`remove Map -- null in src`,
-		`
+	{description: `remove Map -- null in src`,
+		source: `
 kind: Deployment
 spec: null
 `,
-		`
+		dest: `
 kind: Deployment
 spec:
   foo: bar1
   baz: buz
 `,
-		`
+		expected: `
 kind: Deployment
 `,
 	},

kyaml/yaml/merge2/merge2.go

@@ -6,6 +6,7 @@
 package merge2
 
 import (
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 	"sigs.k8s.io/kustomize/kyaml/yaml/walk"
 )
@@ -16,7 +17,7 @@ func Merge(src, dest *yaml.RNode) (*yaml.RNode, error) {
 }
 
 // Merge parses the arguments, and merges fields from srcStr into destStr.
-func MergeStrings(srcStr, destStr string) (string, error) {
+func MergeStrings(srcStr, destStr string, infer bool) (string, error) {
 	src, err := yaml.Parse(srcStr)
 	if err != nil {
 		return "", err
@@ -26,10 +27,15 @@ func MergeStrings(srcStr, destStr string) (string, error) {
 		return "", err
 	}
 
-	result, err := Merge(src, dest)
+	result, err := walk.Walker{
+		Sources:               []*yaml.RNode{dest, src},
+		Visitor:               Merger{},
+		InferAssociativeLists: infer,
+	}.Walk()
 	if err != nil {
 		return "", err
 	}
+
 	return result.String()
 }
 
@@ -39,7 +45,7 @@ type Merger struct {
 
 var _ walk.Visitor = Merger{}
 
-func (m Merger) VisitMap(nodes walk.Sources) (*yaml.RNode, error) {
+func (m Merger) VisitMap(nodes walk.Sources, s *openapi.ResourceSchema) (*yaml.RNode, error) {
 	if err := m.SetComments(nodes); err != nil {
 		return nil, err
 	}
@@ -58,7 +64,7 @@ func (m Merger) VisitMap(nodes walk.Sources) (*yaml.RNode, error) {
 	return nodes.Dest(), nil
 }
 
-func (m Merger) VisitScalar(nodes walk.Sources) (*yaml.RNode, error) {
+func (m Merger) VisitScalar(nodes walk.Sources, s *openapi.ResourceSchema) (*yaml.RNode, error) {
 	if err := m.SetComments(nodes); err != nil {
 		return nil, err
 	}
@@ -73,7 +79,7 @@ func (m Merger) VisitScalar(nodes walk.Sources) (*yaml.RNode, error) {
 	return nodes.Dest(), nil
 }
 
-func (m Merger) VisitList(nodes walk.Sources, kind walk.ListKind) (*yaml.RNode, error) {
+func (m Merger) VisitList(nodes walk.Sources, s *openapi.ResourceSchema, kind walk.ListKind) (*yaml.RNode, error) {
 	if err := m.SetComments(nodes); err != nil {
 		return nil, err
 	}

kyaml/yaml/merge2/merge2_old_test.go

@@ -365,7 +365,7 @@ a:
   b:
     # header comment
     c: d
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -385,7 +385,7 @@ a:
   b:
     c: d
     # footer comment
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -404,7 +404,7 @@ a:
 a:
   b:
     c: d # line comment
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -426,7 +426,7 @@ a:
   b:
     # replace comment
     c: d
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -447,7 +447,7 @@ a:
   b:
     c: d
     # replace comment
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -466,7 +466,7 @@ a:
 a:
   b:
     c: d # replace comment
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}
@@ -484,7 +484,7 @@ a:
 a:
   b:
     c: d # replace comment
-`)
+`, true)
 	if !assert.NoError(t, err) {
 		return
 	}

kyaml/yaml/merge2/merge2_test.go

@@ -17,24 +17,27 @@ var testCases = [][]testCase{scalarTestCases, listTestCases, elementTestCases, m
 
 func TestMerge(t *testing.T) {
 	for i := range testCases {
-		for _, tc := range testCases[i] {
-			actual, err := MergeStrings(tc.source, tc.dest)
-			if !assert.NoError(t, err, tc.description) {
-				t.FailNow()
-			}
-			e, err := filters.FormatInput(bytes.NewBufferString(tc.expected))
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-			estr := strings.TrimSpace(e.String())
-			a, err := filters.FormatInput(bytes.NewBufferString(actual))
-			if !assert.NoError(t, err) {
-				t.FailNow()
-			}
-			astr := strings.TrimSpace(a.String())
-			if !assert.Equal(t, estr, astr, tc.description) {
-				t.FailNow()
-			}
+		for j := range testCases[i] {
+			tc := testCases[i][j]
+			t.Run(tc.description, func(t *testing.T) {
+				actual, err := MergeStrings(tc.source, tc.dest, tc.infer)
+				if !assert.NoError(t, err, tc.description) {
+					t.FailNow()
+				}
+				e, err := filters.FormatInput(bytes.NewBufferString(tc.expected))
+				if !assert.NoError(t, err) {
+					t.FailNow()
+				}
+				estr := strings.TrimSpace(e.String())
+				a, err := filters.FormatInput(bytes.NewBufferString(actual))
+				if !assert.NoError(t, err) {
+					t.FailNow()
+				}
+				astr := strings.TrimSpace(a.String())
+				if !assert.Equal(t, estr, astr, tc.description) {
+					t.FailNow()
+				}
+			})
 		}
 	}
 }
@@ -44,4 +47,5 @@ type testCase struct {
 	source      string
 	dest        string
 	expected    string
+	infer       bool
 }

kyaml/yaml/merge2/scalar_test.go

@@ -4,30 +4,30 @@
 package merge2_test
 
 var scalarTestCases = []testCase{
-	{`replace scalar -- different value in dest`,
-		`
+	{description: `replace scalar -- different value in dest`,
+		source: `
 kind: Deployment
 field: value1
 `,
-		`
+		dest: `
 kind: Deployment
 field: value0
 `,
-		`
+		expected: `
 kind: Deployment
 field: value1
 `,
 	},
 
-	{`replace scalar -- missing from dest`,
-		`
+	{description: `replace scalar -- missing from dest`,
+		source: `
 kind: Deployment
 field: value1
 `,
-		`
+		dest: `
 kind: Deployment
 `,
-		`
+		expected: `
 kind: Deployment
 field: value1
 `,
@@ -36,16 +36,16 @@ field: value1
 	//
 	// Test Case
 	//
-	{`keep scalar -- same value in src and dest`,
-		`
+	{description: `keep scalar -- same value in src and dest`,
+		source: `
 kind: Deployment
 field: value1
 `,
-		`
+		dest: `
 kind: Deployment
 field: value1
 `,
-		`
+		expected: `
 kind: Deployment
 field: value1
 `,
@@ -54,15 +54,15 @@ field: value1
 	//
 	// Test Case
 	//
-	{`keep scalar -- unspecified in src`,
-		`
+	{description: `keep scalar -- unspecified in src`,
+		source: `
 kind: Deployment
 `,
-		`
+		dest: `
 kind: Deployment
 field: value1
 `,
-		`
+		expected: `
 kind: Deployment
 field: value1
 `,
@@ -71,16 +71,16 @@ field: value1
 	//
 	// Test Case
 	//
-	{`remove scalar -- null in src`,
-		`
+	{description: `remove scalar -- null in src`,
+		source: `
 kind: Deployment
 field: null
 `,
-		`
+		dest: `
 kind: Deployment
 field: value1
 `,
-		`
+		expected: `
 kind: Deployment
 `,
 	},
@@ -88,16 +88,16 @@ kind: Deployment
 	//
 	// Test Case
 	//
-	{`remove scalar -- empty in src`,
-		`
+	{description: `remove scalar -- empty in src`,
+		source: `
 kind: Deployment
 field: {}
 `,
-		`
+		dest: `
 kind: Deployment
 field: value1
 `,
-		`
+		expected: `
 kind: Deployment
 field: {}
 `,
@@ -106,15 +106,15 @@ field: {}
 	//
 	// Test Case
 	//
-	{`remove scalar -- null in src, missing in dest`,
-		`
+	{description: `remove scalar -- null in src, missing in dest`,
+		source: `
 kind: Deployment
 field: null
 `,
-		`
+		dest: `
 kind: Deployment
 `,
-		`
+		expected: `
 kind: Deployment
 `,
 	},
@@ -122,15 +122,15 @@ kind: Deployment
 	//
 	// Test Case
 	//
-	{`merge an empty value`,
-		`
+	{description: `merge an empty value`,
+		source: `
 kind: Deployment
 field: {}
 `,
-		`
+		dest: `
 kind: Deployment
 `,
-		`
+		expected: `
 kind: Deployment
 field: {}
 `,

kyaml/yaml/merge3/list_test.go

@@ -9,224 +9,226 @@ var listTestCases = []testCase{
 	//
 	// Test Case
 	//
-	{`Replace list`,
-		`
+	{description: `Replace list`,
+		origin: `
 list:
 - 1
 - 2
 - 3`,
-		`
+		update: `
 list:
 - 2
 - 3
 - 4`,
-		`
+		local: `
 list:
 - 1
 - 2
 - 3`,
-		`
+		expected: `
 list:
 - 2
 - 3
-- 4`, nil},
+- 4`},
 
 	//
 	// Test Case
 	//
-	{`Add an updated list`,
-		`
+	{description: `Add an updated list`,
+		origin: `
 apiVersion: apps/v1
 list: # old value
 - 1
 - 2
 - 3
 `,
-		`
+		update: `
 apiVersion: apps/v1
 list: # new value
 - 2
 - 3
 - 4
 `,
-		`
+		local: `
 apiVersion: apps/v1`,
-		`
+		expected: `
 apiVersion: apps/v1
 list:
 - 2
 - 3
 - 4
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
-	{`Add keep an omitted field`,
-		`
+	{description: `Add keep an omitted field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: StatefulSet`,
-		`
+		local: `
 apiVersion: apps/v1
 list: # not present in sources
 - 2
 - 3
 - 4
 `,
-		`
+		expected: `
 apiVersion: apps/v1
 list: # not present in sources
 - 2
 - 3
 - 4
 kind: StatefulSet
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
 	// TODO(#36): consider making this an error
-	{`Change an updated field`,
-		`
+	{description: `Change an updated field`,
+		origin: `
 apiVersion: apps/v1
 list: # old value
 - 1
 - 2
 - 3`,
-		`
+		update: `
 apiVersion: apps/v1
 list: # new value
 - 2
 - 3
 - 4`,
-		`
+		local: `
 apiVersion: apps/v1
 list: # conflicting value
 - a
 - b
 - c`,
-		`
+		expected: `
 apiVersion: apps/v1
 list: # conflicting value
 - 2
 - 3
 - 4
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
-	{`Ignore a field -- set`,
-		`
+	{description: `Ignore a field -- set`,
+		origin: `
 apiVersion: apps/v1
 list: # ignore value
 - 1
 - 2
 - 3
 `,
-		`
+		update: `
 apiVersion: apps/v1
 list: # ignore value
 - 1
 - 2
-- 3`, `
+- 3`,
+		local: `
 apiVersion: apps/v1
 list:
 - 2
 - 3
 - 4
-`, `
+`,
+		expected: `
 apiVersion: apps/v1
 list:
 - 2
 - 3
 - 4
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
-	{`Ignore a field -- empty`,
-		`
+	{description: `Ignore a field -- empty`,
+		origin: `
 apiVersion: apps/v1
 list: # ignore value
 - 1
 - 2
 - 3`,
-		`
+		update: `
 apiVersion: apps/v1
 list: # ignore value
 - 1
 - 2
 - 3`,
-		`
+		local: `
 apiVersion: apps/v1
 `,
-		`
+		expected: `
 apiVersion: apps/v1
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
-	{`Explicitly clear a field`,
-		`
+	{description: `Explicitly clear a field`,
+		origin: `
 apiVersion: apps/v1`,
-		`
+		update: `
 apiVersion: apps/v1
 list: null # clear`,
-		`
+		local: `
 apiVersion: apps/v1
 list: # value to clear
 - 1
 - 2
 - 3`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
 	//
 	// Test Case
 	//
-	{`Implicitly clear a field`,
-		`
+	{description: `Implicitly clear a field`,
+		origin: `
 apiVersion: apps/v1
 list: # clear value
 - 1
 - 2
 - 3`,
-		`
+		update: `
 apiVersion: apps/v1`,
-		`
+		local: `
 apiVersion: apps/v1
 list: # old value
 - 1
 - 2
 - 3`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
 	//
 	// Test Case
 	//
 	// TODO(#36): consider making this an error
-	{`Implicitly clear a changed field`,
-		`
+	{description: `Implicitly clear a changed field`,
+		origin: `
 apiVersion: apps/v1
 list: # old value
 - 1
 - 2
 - 3`,
-		`
+		update: `
 apiVersion: apps/v1`,
-		`
+		local: `
 apiVersion: apps/v1
 list: # old value
 - a
 - b
 - c`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 }

kyaml/yaml/merge3/map_test.go

@@ -7,267 +7,267 @@ var mapTestCases = []testCase{
 	//
 	// Test Case
 	//
-	{`Add the annotations map field`,
-		`
+	{description: `Add the annotations map field`,
+		origin: `
 kind: Deployment`,
-		`
+		update: `
 kind: Deployment
 metadata:
   annotations:
     d: e # add these annotations
 `,
-		`
+		local: `
 kind: Deployment`,
-		`
+		expected: `
 kind: Deployment
 metadata:
   annotations:
-    d: e # add these annotations`, nil},
+    d: e # add these annotations`},
 
 	//
 	// Test Case
 	//
-	{`Add an annotation to the field`,
-		`
+	{description: `Add an annotation to the field`,
+		origin: `
 kind: Deployment
 metadata:
   annotations:
     a: b`,
-		`
+		update: `
 kind: Deployment
 metadata:
   annotations:
     a: b
     d: e  # add these annotations`,
-		`
+		local: `
 kind: Deployment
 metadata:
   annotations:
     g: h  # keep these annotations`,
-		`
+		expected: `
 kind: Deployment
 metadata:
   annotations:
     g: h # keep these annotations
-    d: e # add these annotations`, nil},
+    d: e # add these annotations`},
 
 	//
 	// Test Case
 	//
-	{`Add an annotation to the field, field missing from dest`,
-		`
+	{description: `Add an annotation to the field, field missing from dest`,
+		origin: `
 kind: Deployment
 metadata:
   annotations:
     a: b # ignored because unchanged`,
-		`
+		update: `
 kind: Deployment
 metadata:
   annotations:
     a: b # ignore because unchanged
     d: e`,
-		`
+		local: `
 kind: Deployment`,
-		`
+		expected: `
 kind: Deployment
 metadata:
   annotations:
-    d: e`, nil},
+    d: e`},
 
 	//
 	// Test Case
 	//
-	{`Update an annotation on the field, field messing rom the dest`,
-		`
+	{description: `Update an annotation on the field, field messing rom the dest`,
+		origin: `
 kind: Deployment
 metadata:
   annotations:
     a: b
     d: c`,
-		`
+		update: `
 kind: Deployment
 metadata:
   annotations:
     a: b
     d: e  # set these annotations`,
-		`
+		local: `
 kind: Deployment
 metadata:
   annotations:
     g: h  # keep these annotations`,
-		`
+		expected: `
 kind: Deployment
 metadata:
   annotations:
     g: h # keep these annotations
-    d: e # set these annotations`, nil},
+    d: e # set these annotations`},
 
 	//
 	// Test Case
 	//
-	{`Add an annotation to the field, field missing from dest`,
-		`
+	{description: `Add an annotation to the field, field missing from dest`,
+		origin: `
 kind: Deployment
 metadata:
   annotations:
     a: b # ignored because unchanged`,
-		`
+		update: `
 kind: Deployment
 metadata:
   annotations:
     a: b # ignore because unchanged
     d: e`,
-		`
+		local: `
 kind: Deployment`,
-		`
+		expected: `
 kind: Deployment
 metadata:
   annotations:
-    d: e`, nil},
+    d: e`},
 
 	//
 	// Test Case
 	//
-	{`Remove an annotation`,
-		`
+	{description: `Remove an annotation`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     a: b`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations: {}`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     c: d
     a: b`,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
-    c: d`, nil},
+    c: d`},
 
 	//
 	// Test Case
 	//
 	// TODO(#36) support ~annotations~: {} deletion
-	{`Specify a field as empty that isn't present in the source`,
-		`
+	{description: `Specify a field as empty that isn't present in the source`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations: null`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations:
     a: b`,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: foo`, nil},
+  name: foo`},
 
 	//
 	// Test Case
 	//
-	{`Remove an annotation`,
-		`
+	{description: `Remove an annotation`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     a: b`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     c: d
     a: b`,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
-    c: d`, nil},
+    c: d`},
 
 	//
 	// Test Case
 	//
-	{`Remove annotations field`,
-		`
+	{description: `Remove annotations field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     a: b`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo`,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
-	{`Remove annotations field, but keep in dest`,
-		`
+	{description: `Remove annotations field, but keep in dest`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   annotations:
     a: b`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations:
     foo: bar # keep this annotation even though the parent field was removed`,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations:
-    foo: bar # keep this annotation even though the parent field was removed`, nil},
+    foo: bar # keep this annotation even though the parent field was removed`},
 
 	//
 	// Test Case
 	//
-	{`Remove annotations, but they are already empty`,
-		`
+	{description: `Remove annotations, but they are already empty`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -275,24 +275,24 @@ metadata:
   annotations:
     a: b
 `,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
 `,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations: {}
 `,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: foo
   annotations: {}
-`, nil},
+`},
 }

kyaml/yaml/merge3/merge3.go

@@ -13,11 +13,12 @@ import (
 func Merge(dest, original, update *yaml.RNode) (*yaml.RNode, error) {
 	// if update == nil && original != nil => declarative deletion
 
-	return walk.Walker{Visitor: Visitor{},
+	return walk.Walker{
+		Visitor: Visitor{},
 		Sources: []*yaml.RNode{dest, original, update}}.Walk()
 }
 
-func MergeStrings(dest, original, update string) (string, error) {
+func MergeStrings(dest, original, update string, infer bool) (string, error) {
 	srcOriginal, err := yaml.Parse(original)
 	if err != nil {
 		return "", err
@@ -31,7 +32,10 @@ func MergeStrings(dest, original, update string) (string, error) {
 		return "", err
 	}
 
-	result, err := Merge(d, srcOriginal, srcUpdated)
+	result, err := walk.Walker{
+		InferAssociativeLists: infer,
+		Visitor:               Visitor{},
+		Sources:               []*yaml.RNode{d, srcOriginal, srcUpdated}}.Walk()
 	if err != nil {
 		return "", err
 	}

kyaml/yaml/merge3/merge3_test.go

@@ -15,24 +15,27 @@ var testCases = [][]testCase{scalarTestCases, listTestCases, mapTestCases, eleme
 
 func TestMerge(t *testing.T) {
 	for i := range testCases {
-		for _, tc := range testCases[i] {
-			actual, err := MergeStrings(tc.local, tc.origin, tc.update)
-			if tc.err == nil {
-				if !assert.NoError(t, err, tc.description) {
-					t.FailNow()
+		for j := range testCases[i] {
+			tc := testCases[i][j]
+			t.Run(tc.description, func(t *testing.T) {
+				actual, err := MergeStrings(tc.local, tc.origin, tc.update, tc.infer)
+				if tc.err == nil {
+					if !assert.NoError(t, err, tc.description) {
+						t.FailNow()
+					}
+					if !assert.Equal(t,
+						strings.TrimSpace(tc.expected), strings.TrimSpace(actual), tc.description) {
+						t.FailNow()
+					}
+				} else {
+					if !assert.Errorf(t, err, tc.description) {
+						t.FailNow()
+					}
+					if !assert.Contains(t, tc.err.Error(), err.Error()) {
+						t.FailNow()
+					}
 				}
-				if !assert.Equal(t,
-					strings.TrimSpace(tc.expected), strings.TrimSpace(actual), tc.description) {
-					t.FailNow()
-				}
-			} else {
-				if !assert.Errorf(t, err, tc.description) {
-					t.FailNow()
-				}
-				if !assert.Contains(t, tc.err.Error(), err.Error()) {
-					t.FailNow()
-				}
-			}
+			})
 		}
 	}
 }
@@ -44,4 +47,5 @@ type testCase struct {
 	local       string
 	expected    string
 	err         error
+	infer       bool
 }

kyaml/yaml/merge3/scalar_test.go

@@ -8,128 +8,128 @@ var scalarTestCases = []testCase{
 	//
 	// Test Case
 	//
-	{`Set and updated a field`,
-		`kind: Deployment`,
-		`kind: StatefulSet`,
-		`kind: Deployment`,
-		`kind: StatefulSet`, nil},
+	{description: `Set and updated a field`,
+		origin:   `kind: Deployment`,
+		update:   `kind: StatefulSet`,
+		local:    `kind: Deployment`,
+		expected: `kind: StatefulSet`},
 
-	{`Add an updated field`,
-		`
+	{description: `Add an updated field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment # old value`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: StatefulSet # new value`,
-		`
+		local: `
 apiVersion: apps/v1`,
-		`
+		expected: `
 apiVersion: apps/v1
-kind: StatefulSet # new value`, nil},
+kind: StatefulSet # new value`},
 
-	{`Add keep an omitted field`,
-		`
+	{description: `Add keep an omitted field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: StatefulSet`,
-		`
+		local: `
 apiVersion: apps/v1
 spec: foo # field not present in source
 `,
-		`
+		expected: `
 apiVersion: apps/v1
 spec: foo # field not present in source
 kind: StatefulSet
-`, nil},
+`},
 
 	//
 	// Test Case
 	//
 	// TODO(#36): consider making this an error
-	{`Change an updated field`,
-		`
+	{description: `Change an updated field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment # old value`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: StatefulSet # new value`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Service # conflicting value`,
-		`
+		expected: `
 apiVersion: apps/v1
-kind: StatefulSet # new value`, nil},
+kind: StatefulSet # new value`},
 
-	{`Ignore a field`,
-		`
+	{description: `Ignore a field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment # ignore this field`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: Deployment # ignore this field`,
-		`
+		local: `
 apiVersion: apps/v1`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
-	{`Explicitly clear a field`,
-		`
+	{description: `Explicitly clear a field`,
+		origin: `
 apiVersion: apps/v1`,
-		`
+		update: `
 apiVersion: apps/v1
 kind: null # clear this value`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment # value to be cleared`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
-	{`Implicitly clear a field`,
-		`
+	{description: `Implicitly clear a field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment # clear this field`,
-		`
+		update: `
 apiVersion: apps/v1`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: Deployment # clear this field`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
 	//
 	// Test Case
 	//
 	// TODO(#36): consider making this an error
-	{`Implicitly clear a changed field`,
-		`
+	{description: `Implicitly clear a changed field`,
+		origin: `
 apiVersion: apps/v1
 kind: Deployment`,
-		`
+		update: `
 apiVersion: apps/v1`,
-		`
+		local: `
 apiVersion: apps/v1
 kind: StatefulSet`,
-		`
-apiVersion: apps/v1`, nil},
+		expected: `
+apiVersion: apps/v1`},
 
 	//
 	// Test Case
 	//
-	{`Merge an empty scalar value`,
-		`
+	{description: `Merge an empty scalar value`,
+		origin: `
 apiVersion: apps/v1
 `,
-		`
+		update: `
 apiVersion: apps/v1
 kind: {}
 `,
-		`
+		local: `
 apiVersion: apps/v1
 `,
-		`
+		expected: `
 apiVersion: apps/v1
 kind: {}
-`, nil},
+`},
 }

kyaml/yaml/merge3/visitor.go

@@ -4,6 +4,7 @@
 package merge3
 
 import (
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 	"sigs.k8s.io/kustomize/kyaml/yaml/walk"
 )
@@ -17,7 +18,7 @@ const (
 
 type Visitor struct{}
 
-func (m Visitor) VisitMap(nodes walk.Sources) (*yaml.RNode, error) {
+func (m Visitor) VisitMap(nodes walk.Sources, s *openapi.ResourceSchema) (*yaml.RNode, error) {
 	if yaml.IsNull(nodes.Updated()) || yaml.IsNull(nodes.Dest()) {
 		// explicitly cleared from either dest or update
 		return walk.ClearNode, nil
@@ -36,7 +37,7 @@ func (m Visitor) VisitMap(nodes walk.Sources) (*yaml.RNode, error) {
 	return nodes.Dest(), nil
 }
 
-func (m Visitor) visitAList(nodes walk.Sources) (*yaml.RNode, error) {
+func (m Visitor) visitAList(nodes walk.Sources, _ *openapi.ResourceSchema) (*yaml.RNode, error) {
 	if yaml.IsEmpty(nodes.Updated()) && !yaml.IsEmpty(nodes.Origin()) {
 		// implicitly cleared from update -- element was deleted
 		return walk.ClearNode, nil
@@ -51,7 +52,7 @@ func (m Visitor) visitAList(nodes walk.Sources) (*yaml.RNode, error) {
 	return nodes.Dest(), nil
 }
 
-func (m Visitor) VisitScalar(nodes walk.Sources) (*yaml.RNode, error) {
+func (m Visitor) VisitScalar(nodes walk.Sources, s *openapi.ResourceSchema) (*yaml.RNode, error) {
 	if yaml.IsNull(nodes.Updated()) || yaml.IsNull(nodes.Dest()) {
 		// explicitly cleared from either dest or update
 		return nil, nil
@@ -103,9 +104,9 @@ func (m Visitor) visitNAList(nodes walk.Sources) (*yaml.RNode, error) {
 	return nodes.Dest(), nil
 }
 
-func (m Visitor) VisitList(nodes walk.Sources, kind walk.ListKind) (*yaml.RNode, error) {
+func (m Visitor) VisitList(nodes walk.Sources, s *openapi.ResourceSchema, kind walk.ListKind) (*yaml.RNode, error) {
 	if kind == walk.AssociativeList {
-		return m.visitAList(nodes)
+		return m.visitAList(nodes, s)
 	}
 	// non-associative list
 	return m.visitNAList(nodes)

kyaml/yaml/schema/schema.go

@@ -0,0 +1,34 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package schema contains libraries for working with the yaml and openapi packages.
+package schema
+
+import (
+	"sigs.k8s.io/kustomize/kyaml/openapi"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+// IsAssociative returns true if all elements in the list contain an AssociativeSequenceKey
+// as a field.
+func IsAssociative(schema *openapi.ResourceSchema, nodes []*yaml.RNode, infer bool) bool {
+	if schema != nil {
+		// use the schema to identify if the list is associative
+		s, _ := schema.PatchStrategyAndKey()
+		return s == "merge"
+	}
+	if !infer {
+		return false
+	}
+
+	for i := range nodes {
+		node := nodes[i]
+		if yaml.IsEmpty(node) {
+			continue
+		}
+		if node.IsAssociative() {
+			return true
+		}
+	}
+	return false
+}

kyaml/yaml/types.go

@@ -651,24 +651,8 @@ func (rn *RNode) VisitElements(fn func(node *RNode) error) error {
 // The order sets the precedence of the merge keys -- if multiple keys are present
 // in Resources in a list, then the FIRST key which ALL elements in the list have is used as the
 // associative key for merging that list.
-var AssociativeSequenceKeys = []string{
-	"mountPath", "devicePath", "ip", "type", "topologyKey", "name", "containerPort",
-}
-
-// IsAssociative returns true if all elements in the list contain an AssociativeSequenceKey
-// as a field.
-func IsAssociative(nodes []*RNode) bool {
-	for i := range nodes {
-		node := nodes[i]
-		if IsEmpty(node) {
-			continue
-		}
-		if node.IsAssociative() {
-			return true
-		}
-	}
-	return false
-}
+// Only infer name as a merge key.
+var AssociativeSequenceKeys = []string{"name"}
 
 // IsAssociative returns true if the RNode contains an AssociativeSequenceKey as a field.
 func (rn *RNode) IsAssociative() bool {

kyaml/yaml/walk/associative_sequence.go

@@ -7,28 +7,44 @@ import (
 	"strings"
 
 	"github.com/go-errors/errors"
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/sets"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
 func (l *Walker) walkAssociativeSequence() (*yaml.RNode, error) {
 	// may require initializing the dest node
-	dest, err := l.Sources.setDestNode(l.VisitList(l.Sources, AssociativeList))
+	dest, err := l.Sources.setDestNode(l.VisitList(l.Sources, l.Schema, AssociativeList))
 	if dest == nil || err != nil {
 		return nil, err
 	}
 
-	// find the list of elements we need to recursively walk
-	key, err := l.elementKey()
-	if err != nil {
-		return nil, err
+	var key string
+	if l.Schema != nil {
+		_, key = l.Schema.PatchStrategyAndKey()
 	}
+	if key == "" { // no key from the schema, try to infer one
+		// find the list of elements we need to recursively walk
+		key, err = l.elementKey()
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	values := l.elementValues(key)
 
 	// recursively set the elements in the list
+	var s *openapi.ResourceSchema
+	if l.Schema != nil {
+		s = l.Schema.Elements()
+	}
 	for _, value := range values {
-		val, err := Walker{Visitor: l,
-			Sources: l.elementValue(key, value)}.Walk()
+		val, err := Walker{
+			InferAssociativeLists: l.InferAssociativeLists,
+			Visitor:               l,
+			Schema:                s,
+			Sources:               l.elementValue(key, value),
+		}.Walk()
 		if err != nil {
 			return nil, err
 		}

kyaml/yaml/walk/map.go

@@ -6,6 +6,8 @@ package walk
 import (
 	"sort"
 
+	"sigs.k8s.io/kustomize/kyaml/fieldmeta"
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/sets"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
@@ -18,15 +20,27 @@ import (
 // - set each source field value on l.Dest
 func (l Walker) walkMap() (*yaml.RNode, error) {
 	// get the new map value
-	dest, err := l.Sources.setDestNode(l.VisitMap(l.Sources))
+	dest, err := l.Sources.setDestNode(l.VisitMap(l.Sources, l.Schema))
 	if dest == nil || err != nil {
 		return nil, err
 	}
 
 	// recursively set the field values on the map
 	for _, key := range l.fieldNames() {
-		val, err := Walker{Visitor: l,
-			Sources: l.fieldValue(key), Path: append(l.Path, key)}.Walk()
+		var s *openapi.ResourceSchema
+		if l.Schema != nil {
+			s = l.Schema.Field(key)
+		}
+		fv, commentSch := l.fieldValue(key)
+		if commentSch != nil {
+			s = commentSch
+		}
+		val, err := Walker{
+			InferAssociativeLists: l.InferAssociativeLists,
+			Visitor:               l,
+			Schema:                s,
+			Sources:               fv,
+			Path:                  append(l.Path, key)}.Walk()
 		if err != nil {
 			return nil, err
 		}
@@ -42,11 +56,40 @@ func (l Walker) walkMap() (*yaml.RNode, error) {
 }
 
 // valueIfPresent returns node.Value if node is non-nil, otherwise returns nil
-func (l Walker) valueIfPresent(node *yaml.MapNode) *yaml.RNode {
+func (l Walker) valueIfPresent(node *yaml.MapNode) (*yaml.RNode, *openapi.ResourceSchema) {
 	if node == nil {
-		return nil
+		return nil, nil
 	}
-	return node.Value
+
+	// parse the schema for the field if present
+	var s *openapi.ResourceSchema
+	fm := fieldmeta.FieldMeta{}
+	var err error
+	// check the value for a schema
+	if err = fm.Read(node.Value); err == nil {
+		s = &openapi.ResourceSchema{Schema: &fm.Schema}
+		if fm.Schema.Ref.String() != "" {
+			r, err := openapi.Resolve(&fm.Schema.Ref)
+			if err == nil && r != nil {
+				s.Schema = r
+			}
+		}
+	}
+	// check the key for a schema -- this will be used
+	// when the value is a Sequence (comments are attached)
+	// to the key
+	if fm.IsEmpty() {
+		if err = fm.Read(node.Key); err == nil {
+			s = &openapi.ResourceSchema{Schema: &fm.Schema}
+		}
+		if fm.Schema.Ref.String() != "" {
+			r, err := openapi.Resolve(&fm.Schema.Ref)
+			if err == nil && r != nil {
+				s.Schema = r
+			}
+		}
+	}
+	return node.Value, s
 }
 
 // fieldNames returns a sorted slice containing the names of all fields that appear in any of
@@ -67,15 +110,20 @@ func (l Walker) fieldNames() []string {
 }
 
 // fieldValue returns a slice containing each source's value for fieldName
-func (l Walker) fieldValue(fieldName string) []*yaml.RNode {
+func (l Walker) fieldValue(fieldName string) ([]*yaml.RNode, *openapi.ResourceSchema) {
 	var fields []*yaml.RNode
+	var sch *openapi.ResourceSchema
 	for i := range l.Sources {
 		if l.Sources[i] == nil {
 			fields = append(fields, nil)
 			continue
 		}
 		field := l.Sources[i].Field(fieldName)
-		fields = append(fields, l.valueIfPresent(field))
+		f, s := l.valueIfPresent(field)
+		fields = append(fields, f)
+		if sch == nil && !s.IsEmpty() {
+			sch = s
+		}
 	}
-	return fields
+	return fields, sch
 }

kyaml/yaml/walk/nonassociative_sequence.go

@@ -9,5 +9,5 @@ import (
 
 // walkNonAssociativeSequence returns the value of VisitList
 func (l Walker) walkNonAssociativeSequence() (*yaml.RNode, error) {
-	return l.VisitList(l.Sources, NonAssociateList)
+	return l.VisitList(l.Sources, l.Schema, NonAssociateList)
 }

kyaml/yaml/walk/scalar.go

@@ -7,5 +7,5 @@ import "sigs.k8s.io/kustomize/kyaml/yaml"
 
 // walkScalar returns the value of VisitScalar
 func (l Walker) walkScalar() (*yaml.RNode, error) {
-	return l.VisitScalar(l.Sources)
+	return l.VisitScalar(l.Sources, l.Schema)
 }

kyaml/yaml/walk/visitor.go

@@ -4,6 +4,7 @@
 package walk
 
 import (
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
@@ -16,11 +17,11 @@ const (
 
 // Visitor is invoked by walk with source and destination node pairs
 type Visitor interface {
-	VisitMap(nodes Sources) (*yaml.RNode, error)
+	VisitMap(Sources, *openapi.ResourceSchema) (*yaml.RNode, error)
 
-	VisitScalar(nodes Sources) (*yaml.RNode, error)
+	VisitScalar(Sources, *openapi.ResourceSchema) (*yaml.RNode, error)
 
-	VisitList(nodes Sources, kind ListKind) (*yaml.RNode, error)
+	VisitList(Sources, *openapi.ResourceSchema, ListKind) (*yaml.RNode, error)
 }
 
 // ClearNode is returned if GrepFilter should do nothing after calling Set

kyaml/yaml/walk/walk.go

@@ -8,20 +8,30 @@ import (
 	"os"
 	"strings"
 
+	"sigs.k8s.io/kustomize/kyaml/fieldmeta"
+	"sigs.k8s.io/kustomize/kyaml/openapi"
 	"sigs.k8s.io/kustomize/kyaml/yaml"
+	"sigs.k8s.io/kustomize/kyaml/yaml/schema"
 )
 
-// Filter walks the Source RNode and modifies the RNode provided to GrepFilter.
+// Walker walks the Source RNode and modifies the RNode provided to GrepFilter.
 type Walker struct {
 	// Visitor is invoked by GrepFilter
 	Visitor
 
+	Schema *openapi.ResourceSchema
+
 	// Source is the RNode to walk.  All Source fields and associative list elements
 	// will be visited.
 	Sources Sources
 
 	// Path is the field path to the current Source Node.
 	Path []string
+
+	// InferAssociativeLists if set to true will infer merge strategies for
+	// fields which it doesn't have the schema based on the fields in the
+	// list elements.
+	InferAssociativeLists bool
 }
 
 func (l Walker) Kind() yaml.Kind {
@@ -35,6 +45,8 @@ func (l Walker) Kind() yaml.Kind {
 
 // GrepFilter implements yaml.GrepFilter
 func (l Walker) Walk() (*yaml.RNode, error) {
+	l.Schema = l.GetSchema()
+
 	// invoke the handler for the corresponding node type
 	switch l.Kind() {
 	case yaml.MappingNode:
@@ -46,7 +58,7 @@ func (l Walker) Walk() (*yaml.RNode, error) {
 		if err := yaml.ErrorIfAnyInvalidAndNonNull(yaml.SequenceNode, l.Sources...); err != nil {
 			return nil, err
 		}
-		if yaml.IsAssociative(l.Sources) {
+		if schema.IsAssociative(l.Schema, l.Sources, l.InferAssociativeLists) {
 			return l.walkAssociativeSequence()
 		}
 		return l.walkNonAssociativeSequence()
@@ -64,6 +76,49 @@ func (l Walker) Walk() (*yaml.RNode, error) {
 	}
 }
 
+func (l Walker) GetSchema() *openapi.ResourceSchema {
+	for i := range l.Sources {
+		r := l.Sources[i]
+		if yaml.IsEmpty(r) {
+			continue
+		}
+
+		fm := fieldmeta.FieldMeta{}
+		if err := fm.Read(r); err == nil && !fm.IsEmpty() {
+			// per-field schema, this is fine
+			if fm.Schema.Ref.String() != "" {
+				// resolve the reference
+				s, err := openapi.Resolve(&fm.Schema.Ref)
+				if err == nil && s != nil {
+					fm.Schema = *s
+				}
+			}
+			return &openapi.ResourceSchema{Schema: &fm.Schema}
+		}
+	}
+
+	if l.Schema != nil {
+		return l.Schema
+	}
+	for i := range l.Sources {
+		r := l.Sources[i]
+		if yaml.IsEmpty(r) {
+			continue
+		}
+
+		m, _ := r.GetMeta()
+		if m.Kind == "" || m.APIVersion == "" {
+			continue
+		}
+
+		s := openapi.SchemaForResourceType(yaml.TypeMeta{Kind: m.Kind, APIVersion: m.APIVersion})
+		if s != nil {
+			return s
+		}
+	}
+	return nil
+}
+
 const (
 	DestIndex = iota
 	OriginIndex

plugin/builtin/imagetagtransformer/ImageTagTransformer.go

@@ -148,8 +148,10 @@ func (p *plugin) findContainers(obj map[string]interface{}) error {
 }
 
 func isImageMatched(s, t string) bool {
-	// Tag values are limited to [a-zA-Z0-9_.-].
-	pattern, _ := regexp.Compile("^" + t + "(@sha256)?(:[a-zA-Z0-9_.-]*)?$")
+	// Tag values are limited to [a-zA-Z0-9_.{}-].
+	// Some tools like Bazel rules_k8s allow tag patterns with {} characters.
+	// More info: https://github.com/bazelbuild/rules_k8s/pull/423
+	pattern, _ := regexp.Compile("^" + t + "(@sha256)?(:[a-zA-Z0-9_.{}-]*)?$")
 	return pattern.MatchString(s)
 }
 

releasing/VERSIONS

@@ -5,8 +5,8 @@
 
 # kyaml version
 export kyaml_major=0
-export kyaml_minor=0
-export kyaml_patch=11
+export kyaml_minor=1
+export kyaml_patch=0
 
 # kstatus version
 export kstatus_major=0
@@ -16,12 +16,12 @@ export kstatus_patch=1
 # kustomize api version
 export api_major=0
 export api_minor=3
-export api_patch=2
+export api_patch=3
 
 # cmd/config version
 export cmd_config_major=0
-export cmd_config_minor=0
-export cmd_config_patch=11
+export cmd_config_minor=1
+export cmd_config_patch=0
 
 # cmd/kubectl version
 export cmd_kubectl_major=0

travis/kyaml-pre-commit.sh

@@ -5,7 +5,7 @@
 set -e
 
 # run all tests for kyaml and related commands
-targets="kyaml cmd/config cmd/kubectl functions/examples/injection-tshirt-sizes functions/examples/template-go-nginx functions/examples/template-heredoc-cockroachdb functions/examples/validator-kubeval functions/examples/validator-resource-requests"
+targets="kyaml cmd/config cmd/kubectl functions/examples/injection-tshirt-sizes functions/examples/template-go-nginx functions/examples/template-heredoc-cockroachdb functions/examples/validator-kubeval functions/examples/validator-resource-requests functions/examples/application-cr"
 for target in $targets; do
   pushd .
   cd $target