Move the kustomize binary to its own module.

kustomize/go.mod

@@ -0,0 +1,14 @@
+module sigs.k8s.io/kustomize/kustomize/v3
+
+go 1.12
+
+require (
+	github.com/pkg/errors v0.8.1
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/pflag v1.0.5
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	sigs.k8s.io/kustomize/v3 v3.2.0
+	sigs.k8s.io/yaml v1.1.0
+)
+
+replace sigs.k8s.io/kustomize/v3 v3.2.0 => ../../kustomize

kustomize/go.sum

@@ -0,0 +1,271 @@
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kustomize/internal/commands/build/build.go

@@ -0,0 +1,238 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package build
+
+import (
+	"io"
+	"path/filepath"
+	"strings"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+	"sigs.k8s.io/kustomize/v3/pkg/loader"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/plugins"
+	"sigs.k8s.io/kustomize/v3/pkg/resmap"
+	"sigs.k8s.io/kustomize/v3/pkg/resource"
+	"sigs.k8s.io/kustomize/v3/pkg/target"
+	"sigs.k8s.io/kustomize/v3/plugin/builtin"
+	"sigs.k8s.io/yaml"
+)
+
+// Options contain the options for running a build
+type Options struct {
+	kustomizationPath string
+	outputPath        string
+	loadRestrictor    loader.LoadRestrictorFunc
+	outOrder          reorderOutput
+}
+
+// NewOptions creates a Options object
+func NewOptions(p, o string) *Options {
+	return &Options{
+		kustomizationPath: p,
+		outputPath:        o,
+		loadRestrictor:    loader.RestrictionRootOnly,
+	}
+}
+
+var examples = `
+To generate the resources specified in 'someDir/kustomization.yaml', run
+
+  kustomize build someDir
+
+The default argument to 'build' is '.' (the current working directory).
+
+The argument can be a URL resolving to a directory
+with a kustomization.yaml file, e.g.
+
+  kustomize build \
+    github.com/kubernetes-sigs/kustomize//examples/multibases/dev/?ref=v1.0.6
+
+The URL should be formulated as described at
+https://github.com/hashicorp/go-getter#url-format
+`
+
+// NewCmdBuild creates a new build command.
+func NewCmdBuild(
+	out io.Writer, fSys fs.FileSystem,
+	v ifc.Validator, rf *resmap.Factory,
+	ptf resmap.PatchFactory) *cobra.Command {
+	var o Options
+
+	pluginConfig := plugins.DefaultPluginConfig()
+	pl := plugins.NewLoader(pluginConfig, rf)
+
+	cmd := &cobra.Command{
+		Use:          "build {path}",
+		Short:        "Print configuration per contents of " + pgmconfig.KustomizationFileNames[0],
+		Example:      examples,
+		SilenceUsage: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			return o.RunBuild(out, v, fSys, rf, ptf, pl)
+		},
+	}
+
+	cmd.Flags().StringVarP(
+		&o.outputPath,
+		"output", "o", "",
+		"If specified, write the build output to this path.")
+	loader.AddFlagLoadRestrictor(cmd.Flags())
+	plugins.AddFlagEnablePlugins(
+		cmd.Flags(), &pluginConfig.Enabled)
+	addFlagReorderOutput(cmd.Flags())
+	cmd.AddCommand(NewCmdBuildPrune(out, v, fSys, rf, ptf, pl))
+	return cmd
+}
+
+// Validate validates build command.
+func (o *Options) Validate(args []string) (err error) {
+	if len(args) > 1 {
+		return errors.New(
+			"specify one path to " + pgmconfig.KustomizationFileNames[0])
+	}
+	if len(args) == 0 {
+		o.kustomizationPath = loader.CWD
+	} else {
+		o.kustomizationPath = args[0]
+	}
+	o.loadRestrictor, err = loader.ValidateFlagLoadRestrictor()
+	if err != nil {
+		return err
+	}
+	o.outOrder, err = validateFlagReorderOutput()
+	return
+}
+
+// RunBuild runs build command.
+func (o *Options) RunBuild(
+	out io.Writer, v ifc.Validator, fSys fs.FileSystem,
+	rf *resmap.Factory, ptf resmap.PatchFactory,
+	pl *plugins.Loader) error {
+	ldr, err := loader.NewLoader(
+		o.loadRestrictor, v, o.kustomizationPath, fSys)
+	if err != nil {
+		return err
+	}
+	defer ldr.Cleanup()
+	kt, err := target.NewKustTarget(ldr, rf, ptf, pl)
+	if err != nil {
+		return err
+	}
+	m, err := kt.MakeCustomizedResMap()
+	if err != nil {
+		return err
+	}
+	return o.emitResources(out, fSys, m)
+}
+
+func (o *Options) RunBuildPrune(
+	out io.Writer, v ifc.Validator, fSys fs.FileSystem,
+	rf *resmap.Factory, ptf resmap.PatchFactory,
+	pl *plugins.Loader) error {
+	ldr, err := loader.NewLoader(
+		o.loadRestrictor, v, o.kustomizationPath, fSys)
+	if err != nil {
+		return err
+	}
+	defer ldr.Cleanup()
+	kt, err := target.NewKustTarget(ldr, rf, ptf, pl)
+	if err != nil {
+		return err
+	}
+	m, err := kt.MakePruneConfigMap()
+	if err != nil {
+		return err
+	}
+	return o.emitResources(out, fSys, m)
+}
+
+func (o *Options) emitResources(
+	out io.Writer, fSys fs.FileSystem, m resmap.ResMap) error {
+	if o.outputPath != "" && fSys.IsDir(o.outputPath) {
+		return writeIndividualFiles(fSys, o.outputPath, m)
+	}
+	if o.outOrder == legacy {
+		// Done this way just to show how overall sorting
+		// can be performed by a plugin.  This particular
+		// plugin doesn't require configuration; just make
+		// it and call transform.
+		builtin.NewLegacyOrderTransformerPlugin().Transform(m)
+	}
+	res, err := m.AsYaml()
+	if err != nil {
+		return err
+	}
+	if o.outputPath != "" {
+		return fSys.WriteFile(o.outputPath, res)
+	}
+	_, err = out.Write(res)
+	return err
+}
+
+func NewCmdBuildPrune(
+	out io.Writer, v ifc.Validator, fSys fs.FileSystem,
+	rf *resmap.Factory, ptf resmap.PatchFactory,
+	pl *plugins.Loader) *cobra.Command {
+	var o Options
+
+	cmd := &cobra.Command{
+		Use:          "alpha-inventory [path]",
+		Short:        "Print the inventory object which contains a list of all other objects",
+		Example:      examples,
+		SilenceUsage: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			return o.RunBuildPrune(out, v, fSys, rf, ptf, pl)
+		},
+	}
+	return cmd
+}
+
+func writeIndividualFiles(
+	fSys fs.FileSystem, folderPath string, m resmap.ResMap) error {
+	byNamespace := m.GroupedByCurrentNamespace()
+	for namespace, resList := range byNamespace {
+		for _, res := range resList {
+			fName := fileName(res)
+			if len(byNamespace) > 1 {
+				fName = strings.ToLower(namespace) + "_" + fName
+			}
+			err := writeFile(fSys, folderPath, fName, res)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	for _, res := range m.NonNamespaceable() {
+		err := writeFile(fSys, folderPath, fileName(res), res)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func fileName(res *resource.Resource) string {
+	return strings.ToLower(res.GetGvk().String()) +
+		"_" + strings.ToLower(res.GetName()) + ".yaml"
+}
+
+func writeFile(
+	fSys fs.FileSystem, path, fName string, res *resource.Resource) error {
+	out, err := yaml.Marshal(res.Map())
+	if err != nil {
+		return err
+	}
+	return fSys.WriteFile(filepath.Join(path, fName), out)
+}

kustomize/internal/commands/build/build_test.go

@@ -0,0 +1,51 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package build
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+)
+
+func TestNewOptionsToSilenceCodeInspectionError(t *testing.T) {
+	if NewOptions("foo", "bar") == nil {
+		t.Fatal("could not make new options")
+	}
+}
+
+func TestBuildValidate(t *testing.T) {
+	var cases = []struct {
+		name  string
+		args  []string
+		path  string
+		erMsg string
+	}{
+		{"noargs", []string{}, ".", ""},
+		{"file", []string{"beans"}, "beans", ""},
+		{"path", []string{"a/b/c"}, "a/b/c", ""},
+		{"path", []string{"too", "many"},
+			"", "specify one path to " + pgmconfig.KustomizationFileNames[0]},
+	}
+	for _, mycase := range cases {
+		opts := Options{}
+		e := opts.Validate(mycase.args)
+		if len(mycase.erMsg) > 0 {
+			if e == nil {
+				t.Errorf("%s: Expected an error %v", mycase.name, mycase.erMsg)
+			}
+			if e.Error() != mycase.erMsg {
+				t.Errorf("%s: Expected error %s, but got %v", mycase.name, mycase.erMsg, e)
+			}
+			continue
+		}
+		if e != nil {
+			t.Errorf("%s: unknown error: %v", mycase.name, e)
+			continue
+		}
+		if opts.kustomizationPath != mycase.path {
+			t.Errorf("%s: expected path '%s', got '%s'", mycase.name, mycase.path, opts.kustomizationPath)
+		}
+	}
+}

kustomize/internal/commands/build/reorderoutput.go

@@ -0,0 +1,50 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package build
+
+import (
+	"fmt"
+
+	"github.com/spf13/pflag"
+)
+
+//go:generate stringer -type=reorderOutput
+type reorderOutput int
+
+const (
+	unspecified reorderOutput = iota
+	none
+	legacy
+)
+
+const (
+	flagReorderOutputName = "reorder"
+)
+
+var (
+	flagReorderOutputValue = legacy.String()
+	flagReorderOutputHelp  = "Reorder the resources just before output. " +
+		"Use '" + legacy.String() + "' to apply a legacy reordering (Namespaces first, Webhooks last, etc). " +
+		"Use '" + none.String() + "' to suppress a final reordering."
+)
+
+func addFlagReorderOutput(set *pflag.FlagSet) {
+	set.StringVar(
+		&flagReorderOutputValue, flagReorderOutputName,
+		legacy.String(), flagReorderOutputHelp)
+}
+
+func validateFlagReorderOutput() (reorderOutput, error) {
+	switch flagReorderOutputValue {
+	case none.String():
+		return none, nil
+	case legacy.String():
+		return legacy, nil
+	default:
+		return unspecified, fmt.Errorf(
+			"illegal flag value --%s %s; legal values: %v",
+			flagReorderOutputName, flagReorderOutputValue,
+			[]string{legacy.String(), none.String()})
+	}
+}

kustomize/internal/commands/build/reorderoutput_string.go

@@ -0,0 +1,25 @@
+// Code generated by "stringer -type=reorderOutput"; DO NOT EDIT.
+
+package build
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[unspecified-0]
+	_ = x[none-1]
+	_ = x[legacy-2]
+}
+
+const _reorderOutput_name = "unspecifiednonelegacy"
+
+var _reorderOutput_index = [...]uint8{0, 11, 15, 21}
+
+func (i reorderOutput) String() string {
+	if i < 0 || i >= reorderOutput(len(_reorderOutput_index)-1) {
+		return "reorderOutput(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _reorderOutput_name[_reorderOutput_index[i]:_reorderOutput_index[i+1]]
+}

kustomize/internal/commands/commands.go

@@ -0,0 +1,58 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package commands holds the CLI glue mapping textual commands/args to method calls.
+package commands
+
+import (
+	"flag"
+	"os"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/build"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/create"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/misc"
+	"sigs.k8s.io/kustomize/v3/k8sdeps/kunstruct"
+	"sigs.k8s.io/kustomize/v3/k8sdeps/transformer"
+	"sigs.k8s.io/kustomize/v3/k8sdeps/validator"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/resmap"
+	"sigs.k8s.io/kustomize/v3/pkg/resource"
+)
+
+// NewDefaultCommand returns the default (aka root) command for kustomize command.
+func NewDefaultCommand() *cobra.Command {
+	fSys := fs.MakeRealFS()
+	stdOut := os.Stdout
+
+	c := &cobra.Command{
+		Use:   pgmconfig.ProgramName,
+		Short: "Manages declarative configuration of Kubernetes",
+		Long: `
+Manages declarative configuration of Kubernetes.
+See https://sigs.k8s.io/kustomize
+`,
+	}
+
+	uf := kunstruct.NewKunstructuredFactoryImpl()
+	pf := transformer.NewFactoryImpl()
+	rf := resmap.NewFactory(resource.NewFactory(uf), pf)
+	v := validator.NewKustValidator()
+	c.AddCommand(
+		build.NewCmdBuild(
+			stdOut, fSys, v,
+			rf, pf),
+		edit.NewCmdEdit(fSys, v, uf),
+		create.NewCmdCreate(fSys, uf),
+		misc.NewCmdConfig(fSys),
+		misc.NewCmdVersion(stdOut),
+	)
+	c.PersistentFlags().AddGoFlagSet(flag.CommandLine)
+
+	// Workaround for this issue:
+	// https://github.com/kubernetes/kubernetes/issues/17162
+	flag.CommandLine.Parse([]string{})
+	return c
+}

kustomize/internal/commands/create/create.go

@@ -0,0 +1,184 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package create
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+)
+
+type createFlags struct {
+	resources       string
+	namespace       string
+	annotations     string
+	labels          string
+	prefix          string
+	suffix          string
+	detectResources bool
+	detectRecursive bool
+	path            string
+}
+
+// NewCmdCreate returns an instance of 'create' subcommand.
+func NewCmdCreate(fSys fs.FileSystem, uf ifc.KunstructuredFactory) *cobra.Command {
+	opts := createFlags{path: "."}
+	c := &cobra.Command{
+		Use:   "create",
+		Short: "Create a new kustomization in the current directory",
+		Long:  "",
+		Example: `
+	# Create a new overlay from the base '../base".
+	kustomize create --resources ../base
+
+	# Create a new kustomization detecting resources in the current directory.
+	kustomize create --autodetect
+
+	# Create a new kustomization with multiple resources and fields set.
+	kustomize create --resources deployment.yaml,service.yaml,../base --namespace staging --nameprefix acme-
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return runCreate(opts, fSys, uf)
+		},
+	}
+	c.Flags().StringVar(
+		&opts.resources,
+		"resources",
+		"",
+		"Name of a file containing a file to add to the kustomization file.")
+	c.Flags().StringVar(
+		&opts.namespace,
+		"namespace",
+		"",
+		"Set the value of the namespace field in the customization file.")
+	c.Flags().StringVar(
+		&opts.annotations,
+		"annotations",
+		"",
+		"Add one or more common annotations.")
+	c.Flags().StringVar(
+		&opts.labels,
+		"labels",
+		"",
+		"Add one or more common labels.")
+	c.Flags().StringVar(
+		&opts.prefix,
+		"nameprefix",
+		"",
+		"Sets the value of the namePrefix field in the kustomization file.")
+	c.Flags().StringVar(
+		&opts.suffix,
+		"namesuffix",
+		"",
+		"Sets the value of the nameSuffix field in the kustomization file.")
+	c.Flags().BoolVar(
+		&opts.detectResources,
+		"autodetect",
+		false,
+		"Search for kubernetes resources in the current directory to be added to the kustomization file.")
+	c.Flags().BoolVar(
+		&opts.detectRecursive,
+		"recursive",
+		false,
+		"Enable recursive directory searching for resource auto-detection.")
+	return c
+}
+
+func runCreate(opts createFlags, fSys fs.FileSystem, uf ifc.KunstructuredFactory) error {
+	var resources []string
+	var err error
+	if opts.resources != "" {
+		resources, err = util.GlobPatterns(fSys, strings.Split(opts.resources, ","))
+		if err != nil {
+			return err
+		}
+	}
+	if _, err = kustfile.NewKustomizationFile(fSys); err == nil {
+		return fmt.Errorf("kustomization file already exists")
+	}
+	if opts.detectResources {
+		detected, err := detectResources(fSys, uf, opts.path, opts.detectRecursive)
+		if err != nil {
+			return err
+		}
+		for _, resource := range detected {
+			if kustfile.StringInSlice(resource, resources) {
+				continue
+			}
+			resources = append(resources, resource)
+		}
+	}
+	f, err := fSys.Create("kustomization.yaml")
+	if err != nil {
+		return err
+	}
+	f.Close()
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+	m.Resources = resources
+	m.Namespace = opts.namespace
+	m.NamePrefix = opts.prefix
+	m.NameSuffix = opts.suffix
+	annotations, err := util.ConvertToMap(opts.annotations, "annotation")
+	if err != nil {
+		return err
+	}
+	m.CommonAnnotations = annotations
+	labels, err := util.ConvertToMap(opts.labels, "label")
+	if err != nil {
+		return err
+	}
+	m.CommonLabels = labels
+	return mf.Write(m)
+}
+
+func detectResources(fSys fs.FileSystem, uf ifc.KunstructuredFactory, base string, recursive bool) ([]string, error) {
+	var paths []string
+	err := fSys.Walk(base, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if path == base {
+			return nil
+		}
+		if info.IsDir() {
+			if !recursive {
+				return filepath.SkipDir
+			}
+			// If a sub-directory contains an existing kustomization file add the
+			// directory as a resource and do not decend into it.
+			for _, kfilename := range pgmconfig.KustomizationFileNames {
+				if fSys.Exists(filepath.Join(path, kfilename)) {
+					paths = append(paths, path)
+					return filepath.SkipDir
+				}
+			}
+			return nil
+		}
+		fContents, err := fSys.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		if _, err := uf.SliceFromBytes(fContents); err != nil {
+			return nil
+		}
+		paths = append(paths, path)
+		return nil
+	})
+	return paths, err
+}

kustomize/internal/commands/create/create_test.go

@@ -0,0 +1,195 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package create
+
+import (
+	"reflect"
+	"testing"
+
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/k8sdeps/kunstruct"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+var factory = kunstruct.NewKunstructuredFactoryImpl()
+
+func readKustomizationFS(t *testing.T, fakeFS fs.FileSystem) *types.Kustomization {
+	kf, err := kustfile.NewKustomizationFile(fakeFS)
+	if err != nil {
+		t.Errorf("unexpected new error %v", err)
+	}
+	m, err := kf.Read()
+	if err != nil {
+		t.Errorf("unexpected read error %v", err)
+	}
+	return m
+}
+func TestCreateNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	cmd := NewCmdCreate(fakeFS, factory)
+	err := cmd.RunE(cmd, []string{})
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	readKustomizationFS(t, fakeFS)
+}
+
+func TestCreateWithResources(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile("foo.yaml", []byte(""))
+	fakeFS.WriteFile("bar.yaml", []byte(""))
+	opts := createFlags{resources: "foo.yaml,bar.yaml"}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	expected := []string{"foo.yaml", "bar.yaml"}
+	if !reflect.DeepEqual(m.Resources, expected) {
+		t.Fatalf("expected %+v but got %+v", expected, m.Resources)
+	}
+}
+
+func TestCreateWithNamespace(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	want := "foo"
+	opts := createFlags{namespace: want}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	got := m.Namespace
+	if got != want {
+		t.Errorf("want: %s, got: %s", want, got)
+	}
+}
+
+func TestCreateWithLabels(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	opts := createFlags{labels: "foo:bar"}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	expected := map[string]string{"foo": "bar"}
+	if !reflect.DeepEqual(m.CommonLabels, expected) {
+		t.Fatalf("expected %+v but got %+v", expected, m.CommonLabels)
+	}
+}
+
+func TestCreateWithAnnotations(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	opts := createFlags{annotations: "foo:bar"}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	expected := map[string]string{"foo": "bar"}
+	if !reflect.DeepEqual(m.CommonAnnotations, expected) {
+		t.Fatalf("expected %+v but got %+v", expected, m.CommonAnnotations)
+	}
+}
+
+func TestCreateWithNamePrefix(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	want := "foo-"
+	opts := createFlags{prefix: want}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	got := m.NamePrefix
+	if got != want {
+		t.Errorf("want: %s, got: %s", want, got)
+	}
+}
+
+func TestCreateWithNameSuffix(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	opts := createFlags{suffix: "-foo"}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	if m.NameSuffix != "-foo" {
+		t.Errorf("want: -foo, got: %s", m.NameSuffix)
+	}
+}
+
+func writeDetectContent(fakeFS fs.FileSystem) {
+	fakeFS.WriteFile("/test.yaml", []byte(`
+apiVersion: v1
+kind: Service
+metadata:
+  name: test`))
+	fakeFS.WriteFile("/README.md", []byte(`
+# Not a k8s resource
+This file is not a valid kubernetes object.`))
+	fakeFS.WriteFile("/non-k8s.yaml", []byte(`
+# Not a k8s resource
+other: yaml
+foo:
+- bar
+- baz`))
+	fakeFS.Mkdir("/sub")
+	fakeFS.WriteFile("/sub/test.yaml", []byte(`
+apiVersion: v1
+kind: Service
+metadata:
+  name: test2`))
+	fakeFS.WriteFile("/sub/README.md", []byte(`
+# Not a k8s resource
+This file in a subdirectory is not a valid kubernetes object.`))
+	fakeFS.WriteFile("/sub/non-k8s.yaml", []byte(`
+# Not a k8s resource
+other: yaml
+foo:
+- bar
+- baz`))
+	fakeFS.Mkdir("/overlay")
+	fakeFS.WriteFile("/overlay/test.yaml", []byte(`
+apiVersion: v1
+kind: Service
+metadata:
+  name: test3`))
+	fakeFS.WriteFile("/overlay/kustomization.yaml", []byte(`
+resources:
+- test.yaml`))
+}
+
+func TestCreateWithDetect(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	writeDetectContent(fakeFS)
+	opts := createFlags{path: "/", detectResources: true}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	expected := []string{"/test.yaml"}
+	if !reflect.DeepEqual(m.Resources, expected) {
+		t.Fatalf("expected %+v but got %+v", expected, m.Resources)
+	}
+}
+
+func TestCreateWithDetectRecursive(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	writeDetectContent(fakeFS)
+	opts := createFlags{path: "/", detectResources: true, detectRecursive: true}
+	err := runCreate(opts, fakeFS, factory)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+	m := readKustomizationFS(t, fakeFS)
+	expected := []string{"/overlay", "/sub/test.yaml", "/test.yaml"}
+	if !reflect.DeepEqual(m.Resources, expected) {
+		t.Fatalf("expected %+v but got %+v", expected, m.Resources)
+	}
+}

kustomize/internal/commands/edit/add/addbase.go

@@ -0,0 +1,84 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+type addBaseOptions struct {
+	baseDirectoryPaths string
+}
+
+// newCmdAddBase adds the file path of the kustomize base to the kustomization file.
+func newCmdAddBase(fsys fs.FileSystem) *cobra.Command {
+	var o addBaseOptions
+
+	cmd := &cobra.Command{
+		Use:   "base",
+		Short: "Adds one or more bases to the kustomization.yaml in current directory",
+		Example: `
+		add base {filepath1},{filepath2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunAddBase(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates addBase command.
+func (o *addBaseOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify a base directory")
+	}
+	o.baseDirectoryPaths = args[0]
+	return nil
+}
+
+// Complete completes addBase command.
+func (o *addBaseOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunAddBase runs addBase command (do real work).
+func (o *addBaseOptions) RunAddBase(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	// split directory paths
+	paths := strings.Split(o.baseDirectoryPaths, ",")
+	for _, path := range paths {
+		if !fSys.Exists(path) {
+			return errors.New(path + " does not exist")
+		}
+		if kustfile.StringInSlice(path, m.Resources) {
+			return fmt.Errorf("base %s already in kustomization file", path)
+		}
+		m.Resources = append(m.Resources, path)
+
+	}
+
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/add/addbase_test.go

@@ -0,0 +1,86 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+const (
+	baseDirectoryPaths = "my/path/to/wonderful/base,other/path/to/even/more/wonderful/base"
+)
+
+func TestAddBaseHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	bases := strings.Split(baseDirectoryPaths, ",")
+	for _, base := range bases {
+		fakeFS.Mkdir(base)
+	}
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddBase(fakeFS)
+	args := []string{baseDirectoryPaths}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+
+	for _, base := range bases {
+		if !strings.Contains(string(content), base) {
+			t.Errorf("expected base name in kustomization")
+		}
+	}
+}
+
+func TestAddBaseAlreadyThere(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	// Create fake directories
+	bases := strings.Split(baseDirectoryPaths, ",")
+	for _, base := range bases {
+		fakeFS.Mkdir(base)
+	}
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddBase(fakeFS)
+	args := []string{baseDirectoryPaths}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+	// adding an existing base should return an error
+	err = cmd.RunE(cmd, args)
+	if err == nil {
+		t.Errorf("expected already there problem")
+	}
+	var expectedErrors []string
+	for _, base := range bases {
+		msg := "base " + base + " already in kustomization file"
+		expectedErrors = append(expectedErrors, msg)
+		if !kustfile.StringInSlice(msg, expectedErrors) {
+			t.Errorf("unexpected error %v", err)
+		}
+	}
+
+}
+
+func TestAddBaseNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdAddBase(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify a base directory" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/add/addmetadata.go

@@ -0,0 +1,145 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+// kindOfAdd is the kind of metadata being added: label or annotation
+type kindOfAdd int
+
+const (
+	annotation kindOfAdd = iota
+	label
+)
+
+func (k kindOfAdd) String() string {
+	kinds := [...]string{
+		"annotation",
+		"label",
+	}
+	if k < 0 || k > 1 {
+		return "Unknown metadatakind"
+	}
+	return kinds[k]
+}
+
+type addMetadataOptions struct {
+	force        bool
+	metadata     map[string]string
+	mapValidator func(map[string]string) error
+	kind         kindOfAdd
+}
+
+// newCmdAddAnnotation adds one or more commonAnnotations to the kustomization file.
+func newCmdAddAnnotation(fSys fs.FileSystem, v func(map[string]string) error) *cobra.Command {
+	var o addMetadataOptions
+	o.kind = annotation
+	o.mapValidator = v
+	cmd := &cobra.Command{
+		Use:   "annotation",
+		Short: "Adds one or more commonAnnotations to " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		add annotation {annotationKey1:annotationValue1},{annotationKey2:annotationValue2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return o.runE(args, fSys, o.addAnnotations)
+		},
+	}
+	cmd.Flags().BoolVarP(&o.force, "force", "f", false,
+		"overwrite commonAnnotation if it already exists",
+	)
+	return cmd
+}
+
+// newCmdAddLabel adds one or more commonLabels to the kustomization file.
+func newCmdAddLabel(fSys fs.FileSystem, v func(map[string]string) error) *cobra.Command {
+	var o addMetadataOptions
+	o.kind = label
+	o.mapValidator = v
+	cmd := &cobra.Command{
+		Use:   "label",
+		Short: "Adds one or more commonLabels to " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		add label {labelKey1:labelValue1},{labelKey2:labelValue2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return o.runE(args, fSys, o.addLabels)
+		},
+	}
+	cmd.Flags().BoolVarP(&o.force, "force", "f", false,
+		"overwrite commonLabel if it already exists",
+	)
+	return cmd
+}
+
+func (o *addMetadataOptions) runE(
+	args []string, fSys fs.FileSystem, adder func(*types.Kustomization) error) error {
+	err := o.validateAndParse(args)
+	if err != nil {
+		return err
+	}
+	kf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := kf.Read()
+	if err != nil {
+		return err
+	}
+	err = adder(m)
+	if err != nil {
+		return err
+	}
+	return kf.Write(m)
+}
+
+// validateAndParse validates `add` commands and parses them into o.metadata
+func (o *addMetadataOptions) validateAndParse(args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("must specify %s", o.kind)
+	}
+	if len(args) > 1 {
+		return fmt.Errorf("%ss must be comma-separated, with no spaces", o.kind)
+	}
+	m, err := util.ConvertToMap(args[0], o.kind.String())
+	if err != nil {
+		return err
+	}
+	if err = o.mapValidator(m); err != nil {
+		return err
+	}
+	o.metadata = m
+	return nil
+}
+
+func (o *addMetadataOptions) addAnnotations(m *types.Kustomization) error {
+	if m.CommonAnnotations == nil {
+		m.CommonAnnotations = make(map[string]string)
+	}
+	return o.writeToMap(m.CommonAnnotations, annotation)
+}
+
+func (o *addMetadataOptions) addLabels(m *types.Kustomization) error {
+	if m.CommonLabels == nil {
+		m.CommonLabels = make(map[string]string)
+	}
+	return o.writeToMap(m.CommonLabels, label)
+}
+
+func (o *addMetadataOptions) writeToMap(m map[string]string, kind kindOfAdd) error {
+	for k, v := range o.metadata {
+		if _, ok := m[k]; ok && !o.force {
+			return fmt.Errorf("%s %s already in kustomization file", kind, k)
+		}
+		m[k] = v
+	}
+	return nil
+}

kustomize/internal/commands/edit/add/addmetadata_test.go

@@ -0,0 +1,350 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"sigs.k8s.io/kustomize/v3/pkg/validators"
+)
+
+func makeKustomization(t *testing.T) *types.Kustomization {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	kf, err := kustfile.NewKustomizationFile(fakeFS)
+	if err != nil {
+		t.Errorf("unexpected new error %v", err)
+	}
+	m, err := kf.Read()
+	if err != nil {
+		t.Errorf("unexpected read error %v", err)
+	}
+	return m
+}
+
+func TestRunAddAnnotation(t *testing.T) {
+	var o addMetadataOptions
+	o.metadata = map[string]string{"owls": "cute", "otters": "adorable"}
+
+	m := makeKustomization(t)
+	err := o.addAnnotations(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+	// adding the same test input should not work
+	err = o.addAnnotations(m)
+	if err == nil {
+		t.Errorf("expected already in kustomization file error")
+	}
+	// adding new annotations should work
+	o.metadata = map[string]string{"new": "annotation"}
+	err = o.addAnnotations(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+}
+
+func TestAddAnnotationNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	err := cmd.Execute()
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "must specify annotation" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationInvalidFormat(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"whatever:whatever"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != validators.SAD {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationManyArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"k1:v1,k2:v2,k3:v3,k4:v5"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationValueQuoted(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"k1:\"v1\""}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationValueWithColon(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"k1:\"v1:v2\""}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationNoKey(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{":nokey"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "invalid annotation: ':nokey' (need k:v pair where v may be quoted)" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationTooManyColons(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"key:v1:v2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationNoValue(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"no:,value"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationMultipleArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"this:annotation", "has:spaces"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "annotations must be comma-separated, with no spaces" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddAnnotationForce(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddAnnotation(fakeFS, v.Validator)
+	args := []string{"key:foo"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+	// trying to add the same annotation again should not work
+	args = []string{"key:bar"}
+	v = validators.MakeHappyMapValidator(t)
+	cmd = newCmdAddAnnotation(fakeFS, v.Validator)
+	err = cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "annotation key already in kustomization file" {
+		t.Errorf("expected an error")
+	}
+	// but trying to add it with --force should
+	v = validators.MakeHappyMapValidator(t)
+	cmd = newCmdAddAnnotation(fakeFS, v.Validator)
+	cmd.Flag("force").Value.Set("true")
+	err = cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestRunAddLabel(t *testing.T) {
+	var o addMetadataOptions
+	o.metadata = map[string]string{"owls": "cute", "otters": "adorable"}
+
+	m := makeKustomization(t)
+	err := o.addLabels(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+	// adding the same test input should not work
+	err = o.addLabels(m)
+	if err == nil {
+		t.Errorf("expected already in kustomization file error")
+	}
+	// adding new labels should work
+	o.metadata = map[string]string{"new": "label"}
+	err = o.addLabels(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+}
+
+func TestAddLabelNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	err := cmd.Execute()
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "must specify label" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddLabelInvalidFormat(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{"exclamation!:point"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != validators.SAD {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddLabelNoKey(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{":nokey"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "invalid label: ':nokey' (need k:v pair where v may be quoted)" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddLabelTooManyColons(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{"key:v1:v2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddLabelNoValue(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{"no,value:"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}
+
+func TestAddLabelMultipleArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{"this:input", "has:spaces"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "labels must be comma-separated, with no spaces" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestAddLabelForce(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdAddLabel(fakeFS, v.Validator)
+	args := []string{"key:foo"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+	// trying to add the same label again should not work
+	args = []string{"key:bar"}
+	v = validators.MakeHappyMapValidator(t)
+	cmd = newCmdAddLabel(fakeFS, v.Validator)
+	err = cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "label key already in kustomization file" {
+		t.Errorf("expected an error")
+	}
+	// but trying to add it with --force should
+	v = validators.MakeHappyMapValidator(t)
+	cmd = newCmdAddLabel(fakeFS, v.Validator)
+	cmd.Flag("force").Value.Set("true")
+	err = cmd.RunE(cmd, args)
+	v.VerifyCall()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/add/addpatch.go

@@ -0,0 +1,88 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"errors"
+	"log"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/patch"
+)
+
+type addPatchOptions struct {
+	patchFilePaths []string
+}
+
+// newCmdAddPatch adds the name of a file containing a patch to the kustomization file.
+func newCmdAddPatch(fsys fs.FileSystem) *cobra.Command {
+	var o addPatchOptions
+
+	cmd := &cobra.Command{
+		Use:   "patch",
+		Short: "Add the name of a file containing a patch to the kustomization file.",
+		Example: `
+		add patch {filepath}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunAddPatch(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates addPatch command.
+func (o *addPatchOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errors.New("must specify a patch file")
+	}
+	o.patchFilePaths = args
+	return nil
+}
+
+// Complete completes addPatch command.
+func (o *addPatchOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunAddPatch runs addPatch command (do real work).
+func (o *addPatchOptions) RunAddPatch(fSys fs.FileSystem) error {
+	patches, err := util.GlobPatterns(fSys, o.patchFilePaths)
+	if err != nil {
+		return err
+	}
+	if len(patches) == 0 {
+		return nil
+	}
+
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	for _, p := range patches {
+		if patch.Exist(m.PatchesStrategicMerge, p) {
+			log.Printf("patch %s already in kustomization file", p)
+			continue
+		}
+		m.PatchesStrategicMerge = patch.Append(m.PatchesStrategicMerge, p)
+	}
+
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/add/addpatch_test.go

@@ -0,0 +1,75 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+const (
+	patchFileName    = "myWonderfulPatch.yaml"
+	patchFileContent = `
+Lorem ipsum dolor sit amet, consectetur adipiscing elit,
+sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+`
+)
+
+func TestAddPatchHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile(patchFileName, []byte(patchFileContent))
+	fakeFS.WriteFile(patchFileName+"another", []byte(patchFileContent))
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddPatch(fakeFS)
+	args := []string{patchFileName + "*"}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), patchFileName) {
+		t.Errorf("expected patch name in kustomization")
+	}
+	if !strings.Contains(string(content), patchFileName+"another") {
+		t.Errorf("expected patch name in kustomization")
+	}
+}
+
+func TestAddPatchAlreadyThere(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile(patchFileName, []byte(patchFileContent))
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddPatch(fakeFS)
+	args := []string{patchFileName}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+
+	// adding an existing patch shouldn't return an error
+	err = cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+}
+
+func TestAddPatchNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdAddPatch(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify a patch file" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/add/addresource.go

@@ -0,0 +1,87 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"errors"
+	"log"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+type addResourceOptions struct {
+	resourceFilePaths []string
+}
+
+// newCmdAddResource adds the name of a file containing a resource to the kustomization file.
+func newCmdAddResource(fsys fs.FileSystem) *cobra.Command {
+	var o addResourceOptions
+
+	cmd := &cobra.Command{
+		Use:   "resource",
+		Short: "Add the name of a file containing a resource to the kustomization file.",
+		Example: `
+		add resource {filepath}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunAddResource(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates addResource command.
+func (o *addResourceOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errors.New("must specify a resource file")
+	}
+	o.resourceFilePaths = args
+	return nil
+}
+
+// Complete completes addResource command.
+func (o *addResourceOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunAddResource runs addResource command (do real work).
+func (o *addResourceOptions) RunAddResource(fSys fs.FileSystem) error {
+	resources, err := util.GlobPatterns(fSys, o.resourceFilePaths)
+	if err != nil {
+		return err
+	}
+	if len(resources) == 0 {
+		return nil
+	}
+
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	for _, resource := range resources {
+		if kustfile.StringInSlice(resource, m.Resources) {
+			log.Printf("resource %s already in kustomization file", resource)
+			continue
+		}
+		m.Resources = append(m.Resources, resource)
+	}
+
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/add/addresource_test.go

@@ -0,0 +1,75 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+const (
+	resourceFileName    = "myWonderfulResource.yaml"
+	resourceFileContent = `
+Lorem ipsum dolor sit amet, consectetur adipiscing elit,
+sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+`
+)
+
+func TestAddResourceHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile(resourceFileName, []byte(resourceFileContent))
+	fakeFS.WriteFile(resourceFileName+"another", []byte(resourceFileContent))
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddResource(fakeFS)
+	args := []string{resourceFileName + "*"}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), resourceFileName) {
+		t.Errorf("expected resource name in kustomization")
+	}
+	if !strings.Contains(string(content), resourceFileName+"another") {
+		t.Errorf("expected resource name in kustomization")
+	}
+}
+
+func TestAddResourceAlreadyThere(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile(resourceFileName, []byte(resourceFileContent))
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdAddResource(fakeFS)
+	args := []string{resourceFileName}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Fatalf("unexpected cmd error: %v", err)
+	}
+
+	// adding an existing resource doesn't return an error
+	err = cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error :%v", err)
+	}
+}
+
+func TestAddResourceNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdAddResource(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify a resource file" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/add/all.go

@@ -0,0 +1,56 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+)
+
+// NewCmdAdd returns an instance of 'add' subcommand.
+func NewCmdAdd(
+	fSys fs.FileSystem,
+	ldr ifc.Loader,
+	kf ifc.KunstructuredFactory) *cobra.Command {
+	c := &cobra.Command{
+		Use:   "add",
+		Short: "Adds an item to the kustomization file.",
+		Long:  "",
+		Example: `
+	# Adds a secret to the kustomization file
+	kustomize edit add secret NAME --from-literal=k=v
+
+	# Adds a configmap to the kustomization file
+	kustomize edit add configmap NAME --from-literal=k=v
+
+	# Adds a resource to the kustomization
+	kustomize edit add resource <filepath>
+
+	# Adds a patch to the kustomization
+	kustomize edit add patch <filepath>
+
+	# Adds one or more base directories to the kustomization
+	kustomize edit add base <filepath>
+	kustomize edit add base <filepath1>,<filepath2>,<filepath3>
+
+	# Adds one or more commonLabels to the kustomization
+	kustomize edit add label {labelKey1:labelValue1},{labelKey2:labelValue2}
+
+	# Adds one or more commonAnnotations to the kustomization
+	kustomize edit add annotation {annotationKey1:annotationValue1},{annotationKey2:annotationValue2}
+`,
+		Args: cobra.MinimumNArgs(1),
+	}
+	c.AddCommand(
+		newCmdAddResource(fSys),
+		newCmdAddPatch(fSys),
+		newCmdAddSecret(fSys, ldr, kf),
+		newCmdAddConfigMap(fSys, ldr, kf),
+		newCmdAddBase(fSys),
+		newCmdAddLabel(fSys, ldr.Validator().MakeLabelValidator()),
+		newCmdAddAnnotation(fSys, ldr.Validator().MakeAnnotationValidator()),
+	)
+	return c
+}

kustomize/internal/commands/edit/add/configmap.go

@@ -0,0 +1,130 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+// newCmdAddConfigMap returns a new command.
+func newCmdAddConfigMap(
+	fSys fs.FileSystem,
+	ldr ifc.Loader,
+	kf ifc.KunstructuredFactory) *cobra.Command {
+	var flags flagsAndArgs
+	cmd := &cobra.Command{
+		Use:   "configmap NAME [--from-file=[key=]source] [--from-literal=key1=value1]",
+		Short: "Adds a configmap to the kustomization file.",
+		Long:  "",
+		Example: `
+	# Adds a configmap to the kustomization file (with a specified key)
+	kustomize edit add configmap my-configmap --from-file=my-key=file/path --from-literal=my-literal=12345
+
+	# Adds a configmap to the kustomization file (key is the filename)
+	kustomize edit add configmap my-configmap --from-file=file/path
+
+	# Adds a configmap from env-file
+	kustomize edit add configmap my-configmap --from-env-file=env/path.env
+`,
+		RunE: func(_ *cobra.Command, args []string) error {
+			err := flags.ExpandFileSource(fSys)
+			if err != nil {
+				return err
+			}
+
+			err = flags.Validate(args)
+			if err != nil {
+				return err
+			}
+
+			// Load the kustomization file.
+			mf, err := kustfile.NewKustomizationFile(fSys)
+			if err != nil {
+				return err
+			}
+
+			kustomization, err := mf.Read()
+			if err != nil {
+				return err
+			}
+
+			// Add the flagsAndArgs map to the kustomization file.
+			err = addConfigMap(ldr, kustomization, flags, kf)
+			if err != nil {
+				return err
+			}
+
+			// Write out the kustomization file with added configmap.
+			return mf.Write(kustomization)
+		},
+	}
+
+	cmd.Flags().StringSliceVar(
+		&flags.FileSources,
+		"from-file",
+		[]string{},
+		"Key file can be specified using its file path, in which case file basename will be used as configmap "+
+			"key, or optionally with a key and file path, in which case the given key will be used.  Specifying a "+
+			"directory will iterate each named file in the directory whose basename is a valid configmap key.")
+	cmd.Flags().StringArrayVar(
+		&flags.LiteralSources,
+		"from-literal",
+		[]string{},
+		"Specify a key and literal value to insert in configmap (i.e. mykey=somevalue)")
+	cmd.Flags().StringVar(
+		&flags.EnvFileSource,
+		"from-env-file",
+		"",
+		"Specify the path to a file to read lines of key=val pairs to create a configmap (i.e. a Docker .env file).")
+
+	return cmd
+}
+
+// addConfigMap adds a configmap to a kustomization file.
+// Note: error may leave kustomization file in an undefined state.
+// Suggest passing a copy of kustomization file.
+func addConfigMap(
+	ldr ifc.Loader,
+	k *types.Kustomization,
+	flags flagsAndArgs, kf ifc.KunstructuredFactory) error {
+	args := findOrMakeConfigMapArgs(k, flags.Name)
+	mergeFlagsIntoCmArgs(args, flags)
+	// Validate by trying to create corev1.configmap.
+	_, err := kf.MakeConfigMap(ldr, k.GeneratorOptions, args)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func findOrMakeConfigMapArgs(m *types.Kustomization, name string) *types.ConfigMapArgs {
+	for i, v := range m.ConfigMapGenerator {
+		if name == v.Name {
+			return &m.ConfigMapGenerator[i]
+		}
+	}
+	// config map not found, create new one and add it to the kustomization file.
+	cm := &types.ConfigMapArgs{GeneratorArgs: types.GeneratorArgs{Name: name}}
+	m.ConfigMapGenerator = append(m.ConfigMapGenerator, *cm)
+	return &m.ConfigMapGenerator[len(m.ConfigMapGenerator)-1]
+}
+
+func mergeFlagsIntoCmArgs(args *types.ConfigMapArgs, flags flagsAndArgs) {
+	if len(flags.LiteralSources) > 0 {
+		args.LiteralSources = append(
+			args.LiteralSources, flags.LiteralSources...)
+	}
+	if len(flags.FileSources) > 0 {
+		args.FileSources = append(
+			args.FileSources, flags.FileSources...)
+	}
+	if flags.EnvFileSource != "" {
+		args.EnvSources = append(
+			args.EnvSources, flags.EnvFileSource)
+	}
+}

kustomize/internal/commands/edit/add/configmap_test.go

@@ -0,0 +1,107 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/loader"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"sigs.k8s.io/kustomize/v3/pkg/validators"
+)
+
+func TestNewAddConfigMapIsNotNil(t *testing.T) {
+	fSys := fs.MakeFakeFS()
+	ldr := loader.NewFileLoaderAtCwd(validators.MakeFakeValidator(), fSys)
+	if newCmdAddConfigMap(fSys, ldr, nil) == nil {
+		t.Fatal("newCmdAddConfigMap shouldn't be nil")
+	}
+}
+
+func TestMakeConfigMapArgs(t *testing.T) {
+	cmName := "test-config-name"
+
+	kustomization := &types.Kustomization{
+		NamePrefix: "test-name-prefix",
+	}
+
+	if len(kustomization.ConfigMapGenerator) != 0 {
+		t.Fatal("Initial kustomization should not have any configmaps")
+	}
+	args := findOrMakeConfigMapArgs(kustomization, cmName)
+
+	if args == nil {
+		t.Fatalf("args should always be non-nil")
+	}
+
+	if len(kustomization.ConfigMapGenerator) != 1 {
+		t.Fatalf("Kustomization should have newly created configmap")
+	}
+
+	if &kustomization.ConfigMapGenerator[len(kustomization.ConfigMapGenerator)-1] != args {
+		t.Fatalf("Pointer address for newly inserted configmap generator should be same")
+	}
+
+	args2 := findOrMakeConfigMapArgs(kustomization, cmName)
+
+	if args2 != args {
+		t.Fatalf("should have returned an existing args with name: %v", cmName)
+	}
+
+	if len(kustomization.ConfigMapGenerator) != 1 {
+		t.Fatalf("Should not insert configmap for an existing name: %v", cmName)
+	}
+}
+
+func TestMergeFlagsIntoConfigMapArgs_LiteralSources(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeConfigMapArgs(k, "foo")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{LiteralSources: []string{"k1=v1"}})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{LiteralSources: []string{"k2=v2"}})
+	if k.ConfigMapGenerator[0].LiteralSources[0] != "k1=v1" {
+		t.Fatalf("expected v1")
+	}
+	if k.ConfigMapGenerator[0].LiteralSources[1] != "k2=v2" {
+		t.Fatalf("expected v2")
+	}
+}
+
+func TestMergeFlagsIntoConfigMapArgs_FileSources(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeConfigMapArgs(k, "foo")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{FileSources: []string{"file1"}})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{FileSources: []string{"file2"}})
+	if k.ConfigMapGenerator[0].FileSources[0] != "file1" {
+		t.Fatalf("expected file1")
+	}
+	if k.ConfigMapGenerator[0].FileSources[1] != "file2" {
+		t.Fatalf("expected file2")
+	}
+}
+
+func TestMergeFlagsIntoConfigMapArgs_EnvSource(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeConfigMapArgs(k, "foo")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{EnvFileSource: "env1"})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{EnvFileSource: "env2"})
+	if k.ConfigMapGenerator[0].EnvSources[0] != "env1" {
+		t.Fatalf("expected env1")
+	}
+	if k.ConfigMapGenerator[0].EnvSources[1] != "env2" {
+		t.Fatalf("expected env2")
+	}
+}

kustomize/internal/commands/edit/add/flagsandargs.go

@@ -0,0 +1,95 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"fmt"
+	"strings"
+
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+// flagsAndArgs encapsulates the options for add secret/configmap commands.
+type flagsAndArgs struct {
+	// Name of configMap/Secret (required)
+	Name string
+	// FileSources to derive the configMap/Secret from (optional)
+	FileSources []string
+	// LiteralSources to derive the configMap/Secret from (optional)
+	LiteralSources []string
+	// EnvFileSource to derive the configMap/Secret from (optional)
+	// TODO: Rationalize this name with Generic.EnvSource
+	EnvFileSource string
+	// Type of secret to create
+	Type string
+}
+
+// Validate validates required fields are set to support structured generation.
+func (a *flagsAndArgs) Validate(args []string) error {
+	if len(args) != 1 {
+		return fmt.Errorf("name must be specified once")
+	}
+	a.Name = args[0]
+	if len(a.EnvFileSource) == 0 && len(a.FileSources) == 0 && len(a.LiteralSources) == 0 {
+		return fmt.Errorf("at least from-env-file, or from-file or from-literal must be set")
+	}
+	if len(a.EnvFileSource) > 0 && (len(a.FileSources) > 0 || len(a.LiteralSources) > 0) {
+		return fmt.Errorf("from-env-file cannot be combined with from-file or from-literal")
+	}
+	// TODO: Should we check if the path exists? if it's valid, if it's within the same (sub-)directory?
+	return nil
+}
+
+// ExpandFileSource normalizes a string list, possibly
+// containing globs, into a validated, globless list.
+// For example, this list:
+//     some/path
+//     some/dir/a*
+//     bfile=some/dir/b*
+// becomes:
+//     some/path
+//     some/dir/airplane
+//     some/dir/ant
+//     some/dir/apple
+//     bfile=some/dir/banana
+// i.e. everything is converted to a key=value pair,
+// where the value is always a relative file path,
+// and the key, if missing, is the same as the value.
+// In the case where the key is explicitly declared,
+// the globbing, if present, must have exactly one match.
+func (a *flagsAndArgs) ExpandFileSource(fSys fs.FileSystem) error {
+	var results []string
+	for _, pattern := range a.FileSources {
+		var patterns []string
+		key := ""
+		// check if the pattern is in `--from-file=[key=]source` format
+		// and if so split it to send only the file-pattern to glob function
+		s := strings.Split(pattern, "=")
+		if len(s) == 2 {
+			patterns = append(patterns, s[1])
+			key = s[0]
+		} else {
+			patterns = append(patterns, s[0])
+		}
+		result, err := util.GlobPatterns(fSys, patterns)
+		if err != nil {
+			return err
+		}
+		// if the format is `--from-file=[key=]source` accept only one result
+		// and extend it with the `key=` prefix
+		if key != "" {
+			if len(result) != 1 {
+				return fmt.Errorf(
+					"'pattern '%s' catches files %v, should catch only one", pattern, result)
+			}
+			fileSource := fmt.Sprintf("%s=%s", key, result[0])
+			results = append(results, fileSource)
+		} else {
+			results = append(results, result...)
+		}
+	}
+	a.FileSources = results
+	return nil
+}

kustomize/internal/commands/edit/add/flagsandargs_test.go

@@ -0,0 +1,125 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"reflect"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+func TestDataValidation_NoName(t *testing.T) {
+	fa := flagsAndArgs{}
+
+	if fa.Validate([]string{}) == nil {
+		t.Fatal("Validation should fail if no name is specified")
+	}
+}
+
+func TestDataValidation_MoreThanOneName(t *testing.T) {
+	fa := flagsAndArgs{}
+
+	if fa.Validate([]string{"name", "othername"}) == nil {
+		t.Fatal("Validation should fail if more than one name is specified")
+	}
+}
+
+func TestDataConfigValidation_Flags(t *testing.T) {
+	tests := []struct {
+		name       string
+		fa         flagsAndArgs
+		shouldFail bool
+	}{
+		{
+			name: "env-file-source and literal are both set",
+			fa: flagsAndArgs{
+				LiteralSources: []string{"one", "two"},
+				EnvFileSource:  "three",
+			},
+			shouldFail: true,
+		},
+		{
+			name: "env-file-source and from-file are both set",
+			fa: flagsAndArgs{
+				FileSources:   []string{"one", "two"},
+				EnvFileSource: "three",
+			},
+			shouldFail: true,
+		},
+		{
+			name:       "we don't have any option set",
+			fa:         flagsAndArgs{},
+			shouldFail: true,
+		},
+		{
+			name: "we have from-file and literal ",
+			fa: flagsAndArgs{
+				LiteralSources: []string{"one", "two"},
+				FileSources:    []string{"three", "four"},
+			},
+			shouldFail: false,
+		},
+	}
+
+	for _, test := range tests {
+		if test.fa.Validate([]string{"name"}) == nil && test.shouldFail {
+			t.Fatalf("Validation should fail if %s", test.name)
+		} else if test.fa.Validate([]string{"name"}) != nil && !test.shouldFail {
+			t.Fatalf("Validation should succeed if %s", test.name)
+		}
+	}
+}
+
+func TestExpandFileSource(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.Create("dir/fa1")
+	fakeFS.Create("dir/fa2")
+	fakeFS.Create("dir/readme")
+	fa := flagsAndArgs{
+		FileSources: []string{"dir/fa*"},
+	}
+	fa.ExpandFileSource(fakeFS)
+	expected := []string{
+		"dir/fa1",
+		"dir/fa2",
+	}
+	if !reflect.DeepEqual(fa.FileSources, expected) {
+		t.Fatalf("FileSources is not correctly expanded: %v", fa.FileSources)
+	}
+}
+
+func TestExpandFileSourceWithKey(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.Create("dir/faaaaaaaaaabbbbbbbbbccccccccccccccccc")
+	fakeFS.Create("dir/foobar")
+	fakeFS.Create("dir/simplebar")
+	fakeFS.Create("dir/readme")
+	fa := flagsAndArgs{
+		FileSources: []string{"foo-key=dir/fa*", "bar-key=dir/foobar", "dir/simplebar"},
+	}
+	fa.ExpandFileSource(fakeFS)
+	expected := []string{
+		"foo-key=dir/faaaaaaaaaabbbbbbbbbccccccccccccccccc",
+		"bar-key=dir/foobar",
+		"dir/simplebar",
+	}
+	if !reflect.DeepEqual(fa.FileSources, expected) {
+		t.Fatalf("FileSources is not correctly expanded: %v", fa.FileSources)
+	}
+}
+
+func TestExpandFileSourceWithKeyAndError(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.Create("dir/fa1")
+	fakeFS.Create("dir/fa2")
+	fakeFS.Create("dir/readme")
+	fa := flagsAndArgs{
+		FileSources: []string{"foo-key=dir/fa*"},
+	}
+	err := fa.ExpandFileSource(fakeFS)
+	if err == nil {
+		t.Fatalf("FileSources should not be correctly expanded: %v", fa.FileSources)
+	}
+}

kustomize/internal/commands/edit/add/secret.go

@@ -0,0 +1,137 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+// newCmdAddSecret returns a new command.
+func newCmdAddSecret(
+	fSys fs.FileSystem,
+	ldr ifc.Loader,
+	kf ifc.KunstructuredFactory) *cobra.Command {
+	var flags flagsAndArgs
+	cmd := &cobra.Command{
+		Use:   "secret NAME [--from-file=[key=]source] [--from-literal=key1=value1] [--type=Opaque|kubernetes.io/tls]",
+		Short: "Adds a secret to the kustomization file.",
+		Long:  "",
+		Example: `
+	# Adds a secret to the kustomization file (with a specified key)
+	kustomize edit add secret my-secret --from-file=my-key=file/path --from-literal=my-literal=12345
+
+	# Adds a secret to the kustomization file (key is the filename)
+	kustomize edit add secret my-secret --from-file=file/path
+
+	# Adds a secret from env-file
+	kustomize edit add secret my-secret --from-env-file=env/path.env
+`,
+		RunE: func(_ *cobra.Command, args []string) error {
+			err := flags.ExpandFileSource(fSys)
+			if err != nil {
+				return err
+			}
+
+			err = flags.Validate(args)
+			if err != nil {
+				return err
+			}
+
+			// Load the kustomization file.
+			mf, err := kustfile.NewKustomizationFile(fSys)
+			if err != nil {
+				return err
+			}
+
+			kustomization, err := mf.Read()
+			if err != nil {
+				return err
+			}
+
+			// Add the flagsAndArgs map to the kustomization file.
+			err = addSecret(ldr, kustomization, flags, kf)
+			if err != nil {
+				return err
+			}
+
+			// Write out the kustomization file with added secret.
+			return mf.Write(kustomization)
+		},
+	}
+
+	cmd.Flags().StringSliceVar(
+		&flags.FileSources,
+		"from-file",
+		[]string{},
+		"Key file can be specified using its file path, in which case file basename will be used as secret "+
+			"key, or optionally with a key and file path, in which case the given key will be used.  Specifying a "+
+			"directory will iterate each named file in the directory whose basename is a valid secret key.")
+	cmd.Flags().StringArrayVar(
+		&flags.LiteralSources,
+		"from-literal",
+		[]string{},
+		"Specify a key and literal value to insert in secret (i.e. mykey=somevalue)")
+	cmd.Flags().StringVar(
+		&flags.EnvFileSource,
+		"from-env-file",
+		"",
+		"Specify the path to a file to read lines of key=val pairs to create a secret (i.e. a Docker .env file).")
+	cmd.Flags().StringVar(
+		&flags.Type,
+		"type",
+		"Opaque",
+		"Specify the secret type this can be 'Opaque' (default), or 'kubernetes.io/tls'")
+
+	return cmd
+}
+
+// addSecret adds a secret to a kustomization file.
+// Note: error may leave kustomization file in an undefined state.
+// Suggest passing a copy of kustomization file.
+func addSecret(
+	ldr ifc.Loader,
+	k *types.Kustomization,
+	flags flagsAndArgs, kf ifc.KunstructuredFactory) error {
+	args := findOrMakeSecretArgs(k, flags.Name, flags.Type)
+	mergeFlagsIntoGeneratorArgs(&args.GeneratorArgs, flags)
+	// Validate by trying to create corev1.secret.
+	_, err := kf.MakeSecret(ldr, k.GeneratorOptions, args)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func findOrMakeSecretArgs(m *types.Kustomization, name, secretType string) *types.SecretArgs {
+	for i, v := range m.SecretGenerator {
+		if name == v.Name {
+			return &m.SecretGenerator[i]
+		}
+	}
+	// secret not found, create new one and add it to the kustomization file.
+	secret := &types.SecretArgs{
+		GeneratorArgs: types.GeneratorArgs{Name: name},
+		Type:          secretType}
+	m.SecretGenerator = append(m.SecretGenerator, *secret)
+	return &m.SecretGenerator[len(m.SecretGenerator)-1]
+}
+
+func mergeFlagsIntoGeneratorArgs(args *types.GeneratorArgs, flags flagsAndArgs) {
+	if len(flags.LiteralSources) > 0 {
+		args.LiteralSources = append(
+			args.LiteralSources, flags.LiteralSources...)
+	}
+	if len(flags.FileSources) > 0 {
+		args.FileSources = append(
+			args.FileSources, flags.FileSources...)
+	}
+	if flags.EnvFileSource != "" {
+		args.EnvSources = append(
+			args.EnvSources, flags.EnvFileSource)
+	}
+}

kustomize/internal/commands/edit/add/secret_test.go

@@ -0,0 +1,109 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/loader"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"sigs.k8s.io/kustomize/v3/pkg/validators"
+)
+
+func TestNewCmdAddSecretIsNotNil(t *testing.T) {
+	fSys := fs.MakeFakeFS()
+	ldr := loader.NewFileLoaderAtCwd(validators.MakeFakeValidator(), fSys)
+	if newCmdAddSecret(fSys, ldr, nil) == nil {
+		t.Fatal("newCmdAddSecret shouldn't be nil")
+	}
+}
+
+func TestMakeSecretArgs(t *testing.T) {
+	secretName := "test-secret-name"
+
+	kustomization := &types.Kustomization{
+		NamePrefix: "test-name-prefix",
+	}
+
+	secretType := "Opaque"
+
+	if len(kustomization.SecretGenerator) != 0 {
+		t.Fatal("Initial kustomization should not have any secrets")
+	}
+	args := findOrMakeSecretArgs(kustomization, secretName, secretType)
+
+	if args == nil {
+		t.Fatalf("args should always be non-nil")
+	}
+
+	if len(kustomization.SecretGenerator) != 1 {
+		t.Fatalf("Kustomization should have newly created secret")
+	}
+
+	if &kustomization.SecretGenerator[len(kustomization.SecretGenerator)-1] != args {
+		t.Fatalf("Pointer address for newly inserted secret generator should be same")
+	}
+
+	args2 := findOrMakeSecretArgs(kustomization, secretName, secretType)
+
+	if args2 != args {
+		t.Fatalf("should have returned an existing args with name: %v", secretName)
+	}
+
+	if len(kustomization.SecretGenerator) != 1 {
+		t.Fatalf("Should not insert secret for an existing name: %v", secretName)
+	}
+}
+
+func TestMergeFlagsIntoSecretArgs_LiteralSources(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeSecretArgs(k, "foo", "forbidden")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{LiteralSources: []string{"k1=v1"}})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{LiteralSources: []string{"k2=v2"}})
+	if k.SecretGenerator[0].LiteralSources[0] != "k1=v1" {
+		t.Fatalf("expected v1")
+	}
+	if k.SecretGenerator[0].LiteralSources[1] != "k2=v2" {
+		t.Fatalf("expected v2")
+	}
+}
+
+func TestMergeFlagsIntoSecretArgs_FileSources(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeSecretArgs(k, "foo", "forbidden")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{FileSources: []string{"file1"}})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{FileSources: []string{"file2"}})
+	if k.SecretGenerator[0].FileSources[0] != "file1" {
+		t.Fatalf("expected file1")
+	}
+	if k.SecretGenerator[0].FileSources[1] != "file2" {
+		t.Fatalf("expected file2")
+	}
+}
+
+func TestMergeFlagsIntoSecretArgs_EnvSource(t *testing.T) {
+	k := &types.Kustomization{}
+	args := findOrMakeSecretArgs(k, "foo", "forbidden")
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{EnvFileSource: "env1"})
+	mergeFlagsIntoGeneratorArgs(
+		&args.GeneratorArgs,
+		flagsAndArgs{EnvFileSource: "env2"})
+	if k.SecretGenerator[0].EnvSources[0] != "env1" {
+		t.Fatalf("expected env1")
+	}
+	if k.SecretGenerator[0].EnvSources[1] != "env2" {
+		t.Fatalf("expected env2")
+	}
+}

kustomize/internal/commands/edit/all.go

@@ -0,0 +1,44 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package edit
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit/add"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit/fix"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit/remove"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit/set"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+	"sigs.k8s.io/kustomize/v3/pkg/loader"
+)
+
+// NewCmdEdit returns an instance of 'edit' subcommand.
+func NewCmdEdit(
+	fSys fs.FileSystem, v ifc.Validator, kf ifc.KunstructuredFactory) *cobra.Command {
+	c := &cobra.Command{
+		Use:   "edit",
+		Short: "Edits a kustomization file",
+		Long:  "",
+		Example: `
+	# Adds a configmap to the kustomization file
+	kustomize edit add configmap NAME --from-literal=k=v
+
+	# Sets the nameprefix field
+	kustomize edit set nameprefix <prefix-value>
+
+	# Sets the namesuffix field
+	kustomize edit set namesuffix <suffix-value>
+`,
+		Args: cobra.MinimumNArgs(1),
+	}
+
+	c.AddCommand(
+		add.NewCmdAdd(fSys, loader.NewFileLoaderAtCwd(v, fSys), kf),
+		set.NewCmdSet(fSys, v),
+		fix.NewCmdFix(fSys),
+		remove.NewCmdRemove(fSys, loader.NewFileLoaderAtCwd(v, fSys)),
+	)
+	return c
+}

kustomize/internal/commands/edit/fix/fix.go

@@ -0,0 +1,43 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fix
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+// NewCmdFix returns an instance of 'fix' subcommand.
+func NewCmdFix(fSys fs.FileSystem) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "fix",
+		Short: "Fix the missing fields in kustomization file",
+		Long:  "",
+		Example: `
+	# Fix the missing and deprecated fields in kustomization file
+	kustomize edit fix
+
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return RunFix(fSys)
+		},
+	}
+	return cmd
+}
+
+// RunFix runs `fix` command
+func RunFix(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/fix/fix_test.go

@@ -0,0 +1,32 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package fix
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+func TestFix(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomizationWith([]byte(`nameprefix: some-prefix-`))
+
+	cmd := NewCmdFix(fakeFS)
+	err := cmd.RunE(cmd, nil)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), "apiVersion: ") {
+		t.Errorf("expected apiVersion in kustomization")
+	}
+	if !strings.Contains(string(content), "kind: Kustomization") {
+		t.Errorf("expected kind in kustomization")
+	}
+}

kustomize/internal/commands/edit/remove/all.go

@@ -0,0 +1,43 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+)
+
+// NewCmdRemove returns an instance of 'remove' subcommand.
+func NewCmdRemove(
+	fsys fs.FileSystem,
+	ldr ifc.Loader) *cobra.Command {
+	c := &cobra.Command{
+		Use:   "remove",
+		Short: "Removes items from the kustomization file.",
+		Long:  "",
+		Example: `
+	# Removes resources from the kustomization file
+	kustomize edit remove resource {filepath} {filepath}
+	kustomize edit remove resource {pattern}
+
+	# Removes one or more patches from the kustomization file
+	kustomize edit remove patch <filepath>
+
+	# Removes one or more commonLabels from the kustomization file
+	kustomize edit remove label {labelKey1},{labelKey2}
+
+	# Removes one or more commonAnnotations from the kustomization file
+	kustomize edit remove annotation {annotationKey1},{annotationKey2}
+`,
+		Args: cobra.MinimumNArgs(1),
+	}
+	c.AddCommand(
+		newCmdRemoveResource(fsys),
+		newCmdRemoveLabel(fsys, ldr.Validator().MakeLabelNameValidator()),
+		newCmdRemoveAnnotation(fsys, ldr.Validator().MakeAnnotationNameValidator()),
+		newCmdRemovePatch(fsys),
+	)
+	return c
+}

kustomize/internal/commands/edit/remove/removemetadata.go

@@ -0,0 +1,162 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+// kindOfAdd is the kind of metadata being added: label or annotation
+type kindOfAdd int
+
+const (
+	annotation kindOfAdd = iota
+	label
+)
+
+func (k kindOfAdd) String() string {
+	kinds := [...]string{
+		"annotation",
+		"label",
+	}
+	if k < 0 || k > 1 {
+		return "Unknown metadatakind"
+	}
+	return kinds[k]
+}
+
+type removeMetadataOptions struct {
+	ignore         bool
+	metadata       []string
+	arrayValidator func([]string) error
+	kind           kindOfAdd
+}
+
+// newCmdRemoveLabel removes one or more commonAnnotations from the kustomization file.
+func newCmdRemoveAnnotation(fSys fs.FileSystem, v func([]string) error) *cobra.Command {
+	var o removeMetadataOptions
+	o.kind = label
+	o.arrayValidator = v
+	cmd := &cobra.Command{
+		Use:   "annotation",
+		Short: "Removes one or more commonAnnotations from " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		remove annotation {annotationKey1},{annotationKey2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return o.runE(args, fSys, o.removeAnnotations)
+		},
+	}
+	cmd.Flags().BoolVarP(&o.ignore, "ignore-non-existence", "i", false,
+		"ignore error if the given label doesn't exist",
+	)
+	return cmd
+}
+
+// newCmdRemoveLabel removes one or more commonLabels from the kustomization file.
+func newCmdRemoveLabel(fSys fs.FileSystem, v func([]string) error) *cobra.Command {
+	var o removeMetadataOptions
+	o.kind = label
+	o.arrayValidator = v
+	cmd := &cobra.Command{
+		Use:   "label",
+		Short: "Removes one or more commonLabels from " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		remove label {labelKey1},{labelKey2}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return o.runE(args, fSys, o.removeLabels)
+		},
+	}
+	cmd.Flags().BoolVarP(&o.ignore, "ignore-non-existence", "i", false,
+		"ignore error if the given label doesn't exist",
+	)
+	return cmd
+}
+
+func (o *removeMetadataOptions) runE(
+	args []string, fSys fs.FileSystem, remover func(*types.Kustomization) error) error {
+	err := o.validateAndParse(args)
+	if err != nil {
+		return err
+	}
+	kf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := kf.Read()
+	if err != nil {
+		return err
+	}
+	err = remover(m)
+	if err != nil {
+		return err
+	}
+	return kf.Write(m)
+}
+
+// validateAndParse validates `remove` commands and parses them into o.metadata
+func (o *removeMetadataOptions) validateAndParse(args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("must specify %s", o.kind)
+	}
+	if len(args) > 1 {
+		return fmt.Errorf("%ss must be comma-separated, with no spaces", o.kind)
+	}
+	m, err := o.convertToArray(args[0])
+	if err != nil {
+		return err
+	}
+	if err = o.arrayValidator(m); err != nil {
+		return err
+	}
+	o.metadata = m
+	return nil
+}
+
+func (o *removeMetadataOptions) convertToArray(arg string) ([]string, error) {
+	inputs := strings.Split(arg, ",")
+	result := make([]string, 0, len(inputs))
+
+	for _, input := range inputs {
+		if len(input) == 0 {
+			return nil, o.makeError(input, "name is empty")
+		}
+		result = append(result, input)
+	}
+	return result, nil
+}
+
+func (o *removeMetadataOptions) removeAnnotations(m *types.Kustomization) error {
+	if m.CommonAnnotations == nil && !o.ignore {
+		return fmt.Errorf("commonAnnotations is not defined in kustomization file")
+	}
+	return o.removeFromMap(m.CommonAnnotations, annotation)
+}
+
+func (o *removeMetadataOptions) removeLabels(m *types.Kustomization) error {
+	if m.CommonLabels == nil && !o.ignore {
+		return fmt.Errorf("commonLabels is not defined in kustomization file")
+	}
+	return o.removeFromMap(m.CommonLabels, label)
+}
+
+func (o *removeMetadataOptions) removeFromMap(m map[string]string, kind kindOfAdd) error {
+	for _, k := range o.metadata {
+		if _, ok := m[k]; !ok && !o.ignore {
+			return fmt.Errorf("%s %s is not defined in kustomization file", kind, k)
+		}
+		delete(m, k)
+	}
+	return nil
+}
+
+func (o *removeMetadataOptions) makeError(input string, message string) error {
+	return fmt.Errorf("invalid %s: '%s' (%s)", o.kind, input, message)
+}

kustomize/internal/commands/edit/remove/removemetadata_test.go

@@ -0,0 +1,338 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"fmt"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"sigs.k8s.io/kustomize/v3/pkg/validators"
+	"strings"
+	"testing"
+)
+
+func makeKustomizationFS() fs.FileSystem {
+	fakeFS := fs.MakeFakeFS()
+	commonLabels := []string{"label1: val1", "label2: val2"}
+	commonAnnotations := []string{"annotation1: val1", "annotation2: val2"}
+
+	fakeFS.WriteTestKustomizationWith([]byte(
+		fmt.Sprintf("commonLabels:\n  %s\ncommonAnnotations:\n  %s",
+			strings.Join(commonLabels, "\n  "), strings.Join(commonAnnotations, "\n  "))))
+	return fakeFS
+}
+
+func readKustomizationFS(t *testing.T, fakeFS fs.FileSystem) *types.Kustomization {
+	kf, err := kustfile.NewKustomizationFile(fakeFS)
+	if err != nil {
+		t.Errorf("unexpected new error %v", err)
+	}
+	m, err := kf.Read()
+	if err != nil {
+		t.Errorf("unexpected read error %v", err)
+	}
+	return m
+}
+
+func makeKustomization(t *testing.T) *types.Kustomization {
+	fakeFS := makeKustomizationFS()
+	return readKustomizationFS(t, fakeFS)
+}
+
+func TestRemoveAnnotation(t *testing.T) {
+	var o removeMetadataOptions
+	o.metadata = []string{"annotation1"}
+
+	m := makeKustomization(t)
+	err := o.removeAnnotations(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+
+	// adding the same test input should not work
+	err = o.removeAnnotations(m)
+	if err == nil {
+		t.Errorf("expected not exist in kustomization file error")
+	}
+
+	_, exists := m.CommonAnnotations["annotation1"]
+	if exists {
+		t.Errorf("annotation1 must be deleted")
+	}
+
+	_, exists = m.CommonAnnotations["annotation2"]
+	if !exists {
+		t.Errorf("annotation2 must exist")
+	}
+}
+
+func TestRemoveAnnotationIgnore(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	cmd.Flag("ignore-non-existence").Value.Set("true")
+	args := []string{"annotation3"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
+func TestRemoveAnnotationNoDefinition(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomizationWith([]byte(""))
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	args := []string{"annotation1,annotation2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "commonAnnotations is not defined in kustomization file" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveAnnotationNoDefinitionIgnore(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomizationWith([]byte(""))
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	cmd.Flag("ignore-non-existence").Value.Set("true")
+	args := []string{"annotation1,annotation2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
+func TestRemoveAnnotationNoArgs(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	err := cmd.Execute()
+	v.VerifyNoCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "must specify label" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveAnnotationInvalidFormat(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	args := []string{"nospecialchars%^=@"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != validators.SAD {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveAnnotationMultipleArgs(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	args := []string{"annotation1,annotation2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	splitArgs := strings.Split(args[0], ",")
+	for _, k := range splitArgs {
+		if _, exist := m.CommonAnnotations[k]; exist {
+			t.Errorf("%s must be deleted", k)
+		}
+	}
+}
+
+func TestRemoveAnnotationMultipleArgsInvalidFormat(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdRemoveAnnotation(fakeFS, v.ValidatorArray)
+	args := []string{"annotation1", "annotation2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "labels must be comma-separated, with no spaces" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveLabel(t *testing.T) {
+	var o removeMetadataOptions
+	o.metadata = []string{"label1"}
+
+	m := makeKustomization(t)
+	err := o.removeLabels(m)
+	if err != nil {
+		t.Errorf("unexpected error: could not write to kustomization file")
+	}
+
+	// adding the same test input should not work
+	err = o.removeLabels(m)
+	if err == nil {
+		t.Errorf("expected not exist in kustomization file error")
+	}
+
+	_, exists := m.CommonLabels["label1"]
+	if exists {
+		t.Errorf("label1 must be deleted")
+	}
+
+	_, exists = m.CommonLabels["label2"]
+	if !exists {
+		t.Errorf("label2 must exist")
+	}
+}
+
+func TestRemoveLabelIgnore(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	cmd.Flag("ignore-non-existence").Value.Set("true")
+	args := []string{"label3"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
+func TestRemoveLabelNoDefinition(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomizationWith([]byte(""))
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	args := []string{"label1,label2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "commonLabels is not defined in kustomization file" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveLabelNoDefinitionIgnore(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomizationWith([]byte(""))
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	cmd.Flag("ignore-non-existence").Value.Set("true")
+	args := []string{"label1,label2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+}
+
+func TestRemoveLabelNoArgs(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	err := cmd.Execute()
+	v.VerifyNoCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "must specify label" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveLabelInvalidFormat(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	args := []string{"exclamation!"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != validators.SAD {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestRemoveLabelMultipleArgs(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeHappyMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	args := []string{"label1,label2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyCall()
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	splitArgs := strings.Split(args[0], ",")
+	for _, k := range splitArgs {
+		if _, exist := m.CommonLabels[k]; exist {
+			t.Errorf("%s must be deleted", k)
+		}
+	}
+}
+
+func TestRemoveLabelMultipleArgsInvalidFormat(t *testing.T) {
+	fakeFS := makeKustomizationFS()
+
+	v := validators.MakeSadMapValidator(t)
+	cmd := newCmdRemoveLabel(fakeFS, v.ValidatorArray)
+	args := []string{"label1", "label2"}
+	err := cmd.RunE(cmd, args)
+	v.VerifyNoCall()
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "labels must be comma-separated, with no spaces" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/remove/removepatch.go

@@ -0,0 +1,91 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"log"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/util"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/patch"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+)
+
+type removePatchOptions struct {
+	patchFilePaths []string
+}
+
+// newCmdRemovePatch removes the name of a file containing a patch from the kustomization file.
+func newCmdRemovePatch(fsys fs.FileSystem) *cobra.Command {
+	var o removePatchOptions
+
+	cmd := &cobra.Command{
+		Use:   "patch",
+		Short: "Removes one or more patches from " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		remove patch {filepath}`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunRemovePatch(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates removePatch command.
+func (o *removePatchOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errors.New("must specify a patch file")
+	}
+	o.patchFilePaths = args
+	return nil
+}
+
+// Complete completes removePatch command.
+func (o *removePatchOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunRemovePatch runs removePatch command (do real work).
+func (o *removePatchOptions) RunRemovePatch(fSys fs.FileSystem) error {
+	patches, err := util.GlobPatterns(fSys, o.patchFilePaths)
+	if err != nil {
+		return err
+	}
+	if len(patches) == 0 {
+		return nil
+	}
+
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	var removePatches []string
+	for _, p := range patches {
+		if !patch.Exist(m.PatchesStrategicMerge, p) {
+			log.Printf("patch %s doesn't exist in kustomization file", p)
+			continue
+		}
+		removePatches = append(removePatches, p)
+	}
+	m.PatchesStrategicMerge = patch.Delete(m.PatchesStrategicMerge, removePatches...)
+
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/remove/removepatch_test.go

@@ -0,0 +1,136 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/patch"
+)
+
+const (
+	patchFileContent = `
+Lorem ipsum dolor sit amet, consectetur adipiscing elit,
+sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+`
+)
+
+func makeKustomizationPatchFS() fs.FileSystem {
+	fakeFS := fs.MakeFakeFS()
+	patches := []string{"patch1.yaml", "patch2.yaml"}
+
+	fakeFS.WriteTestKustomizationWith([]byte(
+		fmt.Sprintf("patchesStrategicMerge:\n  - %s",
+			strings.Join(patches, "\n  - "))))
+
+	for _, p := range patches {
+		fakeFS.WriteFile(p, []byte(patchFileContent))
+	}
+	fakeFS.WriteFile("patch3.yaml", []byte(patchFileContent))
+	return fakeFS
+}
+
+func TestRemovePatch(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	args := []string{"patch1.yaml"}
+	err := cmd.RunE(cmd, args)
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	for _, k := range args {
+		if patch.Exist(m.PatchesStrategicMerge, k) {
+			t.Errorf("%s must be deleted", k)
+		}
+	}
+}
+
+func TestRemovePatchMultipleArgs(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	args := []string{"patch1.yaml", "patch2.yaml"}
+	err := cmd.RunE(cmd, args)
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	for _, k := range args {
+		if patch.Exist(m.PatchesStrategicMerge, k) {
+			t.Errorf("%s must be deleted", k)
+		}
+	}
+}
+
+func TestRemovePatchGlob(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	args := []string{"patch*.yaml"}
+	err := cmd.RunE(cmd, args)
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	if len(m.PatchesStrategicMerge) != 0 {
+		t.Errorf("all patch must be deleted")
+	}
+}
+
+func TestRemovePatchNotDefinedInKustomization(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	args := []string{"patch3.yaml"}
+	err := cmd.RunE(cmd, args)
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	for _, k := range []string{"patch1.yaml", "patch2.yaml"} {
+		if !patch.Exist(m.PatchesStrategicMerge, k) {
+			t.Errorf("%s must exist", k)
+		}
+	}
+}
+
+func TestRemovePatchNotExist(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	args := []string{"patch4.yaml"}
+	err := cmd.RunE(cmd, args)
+
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	m := readKustomizationFS(t, fakeFS)
+	for _, k := range []string{"patch1.yaml", "patch2.yaml"} {
+		if !patch.Exist(m.PatchesStrategicMerge, k) {
+			t.Errorf("%s must exist", k)
+		}
+	}
+}
+
+func TestRemovePatchNoArgs(t *testing.T) {
+	fakeFS := makeKustomizationPatchFS()
+	cmd := newCmdRemovePatch(fakeFS)
+	err := cmd.RunE(cmd, nil)
+
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "must specify a patch file" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/remove/removeresource.go

@@ -0,0 +1,110 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"errors"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+)
+
+type removeResourceOptions struct {
+	resourceFilePaths []string
+}
+
+// newCmdRemoveResource remove the name of a file containing a resource to the kustomization file.
+func newCmdRemoveResource(fsys fs.FileSystem) *cobra.Command {
+	var o removeResourceOptions
+
+	cmd := &cobra.Command{
+		Use:   "resource",
+		Short: "Removes one or more resource file paths from " + pgmconfig.KustomizationFileNames[0],
+		Example: `
+		remove resource my-resource.yml
+		remove resource resource1.yml resource2.yml resource3.yml
+		remove resource resources/*.yml
+		`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunRemoveResource(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates removeResource command.
+func (o *removeResourceOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errors.New("must specify a resource file")
+	}
+	o.resourceFilePaths = args
+	return nil
+}
+
+// Complete completes removeResource command.
+func (o *removeResourceOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunRemoveResource runs Resource command (do real work).
+func (o *removeResourceOptions) RunRemoveResource(fSys fs.FileSystem) error {
+
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	resources, err := globPatterns(m.Resources, o.resourceFilePaths)
+	if err != nil {
+		return err
+	}
+
+	if len(resources) == 0 {
+		return nil
+	}
+
+	newResources := make([]string, 0, len(m.Resources))
+	for _, resource := range m.Resources {
+		if kustfile.StringInSlice(resource, resources) {
+			continue
+		}
+		newResources = append(newResources, resource)
+	}
+
+	m.Resources = newResources
+	return mf.Write(m)
+}
+
+func globPatterns(resources []string, patterns []string) ([]string, error) {
+	var result []string
+	for _, pattern := range patterns {
+		for _, resource := range resources {
+			match, err := filepath.Match(pattern, resource)
+			if err != nil {
+				return nil, err
+			}
+			if !match {
+				continue
+			}
+			result = append(result, resource)
+		}
+	}
+	return result, nil
+}

kustomize/internal/commands/edit/remove/removeresource_test.go

@@ -0,0 +1,158 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package remove
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+func TestRemoveResources(t *testing.T) {
+	type given struct {
+		resources  []string
+		removeArgs []string
+	}
+	type expected struct {
+		resources []string
+		deleted   []string
+		err       error
+	}
+	testCases := []struct {
+		description string
+		given       given
+		expected    expected
+	}{
+		{
+			description: "remove resource",
+			given: given{
+				resources: []string{
+					"resource1.yaml",
+					"resource2.yaml",
+					"resource3.yaml",
+				},
+				removeArgs: []string{"resource1.yaml"},
+			},
+			expected: expected{
+				resources: []string{
+					"resource2.yaml",
+					"resource3.yaml",
+				},
+				deleted: []string{
+					"resource1.yaml",
+				},
+			},
+		},
+		{
+			description: "remove resources with pattern",
+			given: given{
+				resources: []string{
+					"foo/resource1.yaml",
+					"foo/resource2.yaml",
+					"foo/resource3.yaml",
+					"do/not/deleteme/please.yaml",
+				},
+				removeArgs: []string{"foo/resource*.yaml"},
+			},
+			expected: expected{
+				resources: []string{
+					"do/not/deleteme/please.yaml",
+				},
+				deleted: []string{
+					"foo/resource1.yaml",
+					"foo/resource2.yaml",
+					"foo/resource3.yaml",
+				},
+			},
+		},
+		{
+			description: "nothing found to remove",
+			given: given{
+				resources: []string{
+					"resource1.yaml",
+					"resource2.yaml",
+					"resource3.yaml",
+				},
+				removeArgs: []string{"foo"},
+			},
+			expected: expected{
+				resources: []string{
+					"resource2.yaml",
+					"resource3.yaml",
+					"resource1.yaml",
+				},
+			},
+		},
+		{
+			description: "no arguments",
+			given:       given{},
+			expected: expected{
+				err: errors.New("must specify a resource file"),
+			},
+		},
+		{
+			description: "remove with multiple pattern arguments",
+			given: given{
+				resources: []string{
+					"foo/foo.yaml",
+					"bar/bar.yaml",
+					"resource3.yaml",
+					"do/not/deleteme/please.yaml",
+				},
+				removeArgs: []string{
+					"foo/*.*",
+					"bar/*.*",
+					"res*.yaml",
+				},
+			},
+			expected: expected{
+				resources: []string{
+					"do/not/deleteme/please.yaml",
+				},
+				deleted: []string{
+					"foo/foo.yaml",
+					"bar/bar.yaml",
+					"resource3.yaml",
+				},
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.description, func(t *testing.T) {
+			fakeFS := fs.MakeFakeFS()
+			fakeFS.WriteTestKustomizationWith([]byte(fmt.Sprintf("resources:\n  - %s", strings.Join(tc.given.resources, "\n  - "))))
+			cmd := newCmdRemoveResource(fakeFS)
+			err := cmd.RunE(cmd, tc.given.removeArgs)
+			if err != nil && tc.expected.err == nil {
+
+				t.Errorf("unexpected cmd error: %v", err)
+			} else if tc.expected.err != nil {
+				if err.Error() != tc.expected.err.Error() {
+					t.Errorf("expected error did not occurred. Expected: %v. Actual: %v", tc.expected.err, err)
+				}
+				return
+			}
+			content, err := fakeFS.ReadTestKustomization()
+			if err != nil {
+				t.Errorf("unexpected read error: %v", err)
+			}
+
+			for _, resourceFileName := range tc.expected.resources {
+				if !strings.Contains(string(content), resourceFileName) {
+					t.Errorf("expected resource not found in kustomization file.\nResource: %s\nKustomization file:\n%s", resourceFileName, content)
+				}
+			}
+			for _, resourceFileName := range tc.expected.deleted {
+				if strings.Contains(string(content), resourceFileName) {
+					t.Errorf("expected deleted resource found in kustomization file. Resource: %s\nKustomization file:\n%s", resourceFileName, content)
+				}
+			}
+
+		})
+	}
+}

kustomize/internal/commands/edit/set/all.go

@@ -0,0 +1,35 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+)
+
+// NewCmdSet returns an instance of 'set' subcommand.
+func NewCmdSet(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
+	c := &cobra.Command{
+		Use:   "set",
+		Short: "Sets the value of different fields in kustomization file.",
+		Long:  "",
+		Example: `
+	# Sets the nameprefix field
+	kustomize edit set nameprefix <prefix-value>
+
+	# Sets the namesuffix field
+	kustomize edit set namesuffix <suffix-value>
+`,
+		Args: cobra.MinimumNArgs(1),
+	}
+
+	c.AddCommand(
+		newCmdSetNamePrefix(fsys),
+		newCmdSetNameSuffix(fsys),
+		newCmdSetNamespace(fsys, v),
+		newCmdSetImage(fsys),
+	)
+	return c
+}

kustomize/internal/commands/edit/set/set_name_prefix.go

@@ -0,0 +1,73 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"errors"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+type setNamePrefixOptions struct {
+	prefix string
+}
+
+// newCmdSetNamePrefix sets the value of the namePrefix field in the kustomization.
+func newCmdSetNamePrefix(fsys fs.FileSystem) *cobra.Command {
+	var o setNamePrefixOptions
+
+	cmd := &cobra.Command{
+		Use:   "nameprefix",
+		Short: "Sets the value of the namePrefix field in the kustomization file.",
+		Example: `
+The command
+  set nameprefix acme-
+will add the field "namePrefix: acme-" to the kustomization file if it doesn't exist,
+and overwrite the value with "acme-" if the field does exist.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunSetNamePrefix(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates setNamePrefix command.
+func (o *setNamePrefixOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify exactly one prefix value")
+	}
+	// TODO: add further validation on the value.
+	o.prefix = args[0]
+	return nil
+}
+
+// Complete completes setNamePrefix command.
+func (o *setNamePrefixOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunSetNamePrefix runs setNamePrefix command (does real work).
+func (o *setNamePrefixOptions) RunSetNamePrefix(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+	m.NamePrefix = o.prefix
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/set/set_name_prefix_test.go

@@ -0,0 +1,47 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+const (
+	goodPrefixValue = "acme-"
+)
+
+func TestSetNamePrefixHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdSetNamePrefix(fakeFS)
+	args := []string{goodPrefixValue}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), goodPrefixValue) {
+		t.Errorf("expected prefix value in kustomization file")
+	}
+}
+
+func TestSetNamePrefixNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdSetNamePrefix(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify exactly one prefix value" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/set/set_name_suffix.go

@@ -0,0 +1,73 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"errors"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+type setNameSuffixOptions struct {
+	suffix string
+}
+
+// newCmdSetNameSuffix sets the value of the nameSuffix field in the kustomization.
+func newCmdSetNameSuffix(fsys fs.FileSystem) *cobra.Command {
+	var o setNameSuffixOptions
+
+	cmd := &cobra.Command{
+		Use:   "namesuffix",
+		Short: "Sets the value of the nameSuffix field in the kustomization file.",
+		Example: `
+The command
+  set namesuffix -- -acme
+will add the field "nameSuffix: -acme" to the kustomization file if it doesn't exist,
+and overwrite the value with "-acme" if the field does exist.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			err = o.Complete(cmd, args)
+			if err != nil {
+				return err
+			}
+			return o.RunSetNameSuffix(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates setNameSuffix command.
+func (o *setNameSuffixOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify exactly one suffix value")
+	}
+	// TODO: add further validation on the value.
+	o.suffix = args[0]
+	return nil
+}
+
+// Complete completes setNameSuffix command.
+func (o *setNameSuffixOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunSetNameSuffix runs setNameSuffix command (does real work).
+func (o *setNameSuffixOptions) RunSetNameSuffix(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+	m.NameSuffix = o.suffix
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/set/set_name_suffix_test.go

@@ -0,0 +1,47 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+const (
+	goodSuffixValue = "-acme"
+)
+
+func TestSetNameSuffixHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdSetNameSuffix(fakeFS)
+	args := []string{goodSuffixValue}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	if !strings.Contains(string(content), goodSuffixValue) {
+		t.Errorf("expected suffix value in kustomization file")
+	}
+}
+
+func TestSetNameSuffixNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdSetNameSuffix(fakeFS)
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify exactly one suffix value" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/internal/commands/edit/set/setimage.go

@@ -0,0 +1,195 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"errors"
+	"regexp"
+	"sort"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/image"
+)
+
+type setImageOptions struct {
+	imageMap map[string]image.Image
+}
+
+var pattern = regexp.MustCompile("^(.*):([a-zA-Z0-9._-]*)$")
+
+// errors
+
+var (
+	errImageNoArgs      = errors.New("no image specified")
+	errImageInvalidArgs = errors.New(`invalid format of image, use one of the following options:
+- <image>=<newimage>:<newtag>
+- <image>=<newimage>@<newtag>
+- <image>=<newimage>
+- <image>:<newtag>
+- <image>@<digest>`)
+)
+
+const separator = "="
+
+// newCmdSetImage sets the new names, tags or digests for images in the kustomization.
+func newCmdSetImage(fsys fs.FileSystem) *cobra.Command {
+	var o setImageOptions
+
+	cmd := &cobra.Command{
+		Use:   "image",
+		Short: `Sets images and their new names, new tags or digests in the kustomization file`,
+		Example: `
+The command
+  set image postgres=eu.gcr.io/my-project/postgres:latest my-app=my-registry/my-app@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
+will add
+
+images:
+- name: postgres
+  newName: eu.gcr.io/my-project/postgres
+  newTag: latest
+- digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
+  name: my-app
+  newName: my-registry/my-app
+
+to the kustomization file if it doesn't exist,
+and overwrite the previous ones if the image name exists.
+
+The command
+  set image node:8.15.0 mysql=mariadb alpine@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
+will add
+
+images:
+- name: node
+  newTag: 8.15.0
+- name: mysql
+  newName: mariadb
+- digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3
+  name: alpine
+
+to the kustomization file if it doesn't exist,
+and overwrite the previous ones if the image name exists.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			return o.RunSetImage(fsys)
+		},
+	}
+	return cmd
+}
+
+type overwrite struct {
+	name   string
+	digest string
+	tag    string
+}
+
+// Validate validates setImage command.
+func (o *setImageOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errImageNoArgs
+	}
+
+	o.imageMap = make(map[string]image.Image)
+
+	for _, arg := range args {
+
+		img, err := parse(arg)
+		if err != nil {
+			return err
+		}
+		o.imageMap[img.Name] = img
+	}
+	return nil
+}
+
+// RunSetImage runs setImage command.
+func (o *setImageOptions) RunSetImage(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+
+	// append only new images from kustomize file
+	for _, im := range m.Images {
+		if _, ok := o.imageMap[im.Name]; ok {
+			continue
+		}
+
+		o.imageMap[im.Name] = im
+	}
+
+	var images []image.Image
+	for _, v := range o.imageMap {
+		images = append(images, v)
+	}
+
+	sort.Slice(images, func(i, j int) bool {
+		return images[i].Name < images[j].Name
+	})
+
+	m.Images = images
+	return mf.Write(m)
+}
+
+func parse(arg string) (image.Image, error) {
+
+	// matches if there is an image name to overwrite
+	// <image>=<new-image><:|@><new-tag>
+	if s := strings.Split(arg, separator); len(s) == 2 {
+		p, err := parseOverwrite(s[1], true)
+		return image.Image{
+			Name:    s[0],
+			NewName: p.name,
+			NewTag:  p.tag,
+			Digest:  p.digest,
+		}, err
+	}
+
+	// matches only for <tag|digest> overwrites
+	// <image><:|@><new-tag>
+	p, err := parseOverwrite(arg, false)
+	return image.Image{
+		Name:   p.name,
+		NewTag: p.tag,
+		Digest: p.digest,
+	}, err
+}
+
+// parseOverwrite parses the overwrite parameters
+// from the given arg into a struct
+func parseOverwrite(arg string, overwriteImage bool) (overwrite, error) {
+	// match <image>@<digest>
+	if d := strings.Split(arg, "@"); len(d) > 1 {
+		return overwrite{
+			name:   d[0],
+			digest: d[1],
+		}, nil
+	}
+
+	// match <image>:<tag>
+	if t := pattern.FindStringSubmatch(arg); len(t) == 3 {
+		return overwrite{
+			name: t[1],
+			tag:  t[2],
+		}, nil
+	}
+
+	// match <image>
+	if len(arg) > 0 && overwriteImage {
+		return overwrite{
+			name: arg,
+		}, nil
+	}
+	return overwrite{}, errImageInvalidArgs
+}

kustomize/internal/commands/edit/set/setimage_test.go

@@ -0,0 +1,224 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+func TestSetImage(t *testing.T) {
+	type given struct {
+		args         []string
+		infileImages []string
+	}
+	type expected struct {
+		fileOutput []string
+		err        error
+	}
+	testCases := []struct {
+		description string
+		given       given
+		expected    expected
+	}{
+		{
+			given: given{
+				args: []string{"image1=my-image1:my-tag"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: image1",
+					"  newName: my-image1",
+					"  newTag: my-tag",
+				}},
+		},
+		{
+			given: given{
+				args: []string{"image1=my-image1@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3",
+					"  name: image1",
+					"  newName: my-image1",
+				}},
+		},
+		{
+			given: given{
+				args: []string{"image1:my-tag"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: image1",
+					"  newTag: my-tag",
+				}},
+		},
+		{
+			given: given{
+				args: []string{"image1@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3",
+					"  name: image1",
+				}},
+		},
+		{
+			description: "<image>=<image>",
+			given: given{
+				args: []string{"ngnix=localhost:5000/my-project/ngnix"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: ngnix",
+					"  newName: localhost:5000/my-project/ngnix",
+				}},
+		},
+		{
+			given: given{
+				args: []string{"ngnix=localhost:5000/my-project/ngnix:dev-01"},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: ngnix",
+					"  newName: localhost:5000/my-project/ngnix",
+					"  newTag: dev-01",
+				}},
+		},
+		{
+			description: "override file",
+			given: given{
+				args: []string{"image1=foo.bar.foo:8800/foo/image1:foo-bar"},
+				infileImages: []string{
+					"images:",
+					"- name: image1",
+					"  newName: my-image1",
+					"  newTag: my-tag",
+					"- name: image2",
+					"  newName: my-image2",
+					"  newTag: my-tag2",
+				},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: image1",
+					"  newName: foo.bar.foo:8800/foo/image1",
+					"  newTag: foo-bar",
+					"- name: image2",
+					"  newName: my-image2",
+					"  newTag: my-tag2",
+				}},
+		},
+		{
+			description: "override new tag and new name with just a new tag",
+			given: given{
+				args: []string{"image1:v1"},
+				infileImages: []string{
+					"images:",
+					"- name: image1",
+					"  newTag: my-tag",
+				},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: image1",
+					"  newTag: v1",
+				}},
+		},
+		{
+			description: "multiple args with multiple overrides",
+			given: given{
+				args: []string{
+					"image1=foo.bar.foo:8800/foo/image1:foo-bar",
+					"image2=my-image2@sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3",
+					"image3:my-tag",
+				},
+				infileImages: []string{
+					"images:",
+					"- name: image1",
+					"  newName: my-image1",
+					"  newTag: my-tag1",
+					"- name: image2",
+					"  newName: my-image2",
+					"  newTag: my-tag2",
+					"- name: image3",
+					"  newTag: my-tag",
+				},
+			},
+			expected: expected{
+				fileOutput: []string{
+					"images:",
+					"- name: image1",
+					"  newName: foo.bar.foo:8800/foo/image1",
+					"  newTag: foo-bar",
+					"- digest: sha256:24a0c4b4a4c0eb97a1aabb8e29f18e917d05abfe1b7a7c07857230879ce7d3d3",
+					"  name: image2",
+					"  newName: my-image2",
+					"- name: image3",
+					"  newTag: my-tag",
+				}},
+		},
+		{
+			description: "error: no args",
+			expected: expected{
+				err: errImageNoArgs,
+			},
+		},
+		{
+			description: "error: invalid args",
+			given: given{
+				args: []string{"bad", "args"},
+			},
+			expected: expected{
+				err: errImageInvalidArgs,
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(fmt.Sprintf("%s%v", tc.description, tc.given.args), func(t *testing.T) {
+			// arrange
+			fakeFS := fs.MakeFakeFS()
+			cmd := newCmdSetImage(fakeFS)
+
+			if len(tc.given.infileImages) > 0 {
+				// write file with infileImages
+				fakeFS.WriteTestKustomizationWith([]byte(strings.Join(tc.given.infileImages, "\n")))
+			} else {
+				// writes default kustomization file
+				fakeFS.WriteTestKustomization()
+			}
+
+			// act
+			err := cmd.RunE(cmd, tc.given.args)
+
+			// assert
+			if err != tc.expected.err {
+				t.Errorf("Unexpedted error from set image command. Actual: %v\nExpected: %v", err, tc.expected.err)
+				t.FailNow()
+			}
+
+			content, err := fakeFS.ReadTestKustomization()
+			if err != nil {
+				t.Errorf("unexpected read error: %v", err)
+				t.FailNow()
+			}
+			expectedStr := strings.Join(tc.expected.fileOutput, "\n")
+			if !strings.Contains(string(content), expectedStr) {
+				t.Errorf("unexpected image in kustomization file. \nActual:\n%s\nExpected:\n%s", content, expectedStr)
+			}
+		})
+	}
+}

kustomize/internal/commands/edit/set/setnamespace.go

@@ -0,0 +1,72 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/kustfile"
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/ifc"
+)
+
+type setNamespaceOptions struct {
+	namespace string
+	validator ifc.Validator
+}
+
+// newCmdSetNamespace sets the value of the namespace field in the kustomization.
+func newCmdSetNamespace(fsys fs.FileSystem, v ifc.Validator) *cobra.Command {
+	var o setNamespaceOptions
+
+	cmd := &cobra.Command{
+		Use:   "namespace",
+		Short: "Sets the value of the namespace field in the kustomization file",
+		Example: `
+The command
+	set namespace staging
+will add the field "namespace: staging" to the kustomization file if it doesn't exist,
+and overwrite the value with "staging" if the field does exist.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			o.validator = v
+			err := o.Validate(args)
+			if err != nil {
+				return err
+			}
+			return o.RunSetNamespace(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates setNamespace command.
+func (o *setNamespaceOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify exactly one namespace value")
+	}
+	ns := args[0]
+	if errs := o.validator.ValidateNamespace(ns); len(errs) != 0 {
+		return fmt.Errorf("%q is not a valid namespace name: %s", ns, strings.Join(errs, ";"))
+	}
+	o.namespace = ns
+	return nil
+}
+
+// RunSetNamespace runs setNamespace command (does real work).
+func (o *setNamespaceOptions) RunSetNamespace(fSys fs.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.Read()
+	if err != nil {
+		return err
+	}
+	m.Namespace = o.namespace
+	return mf.Write(m)
+}

kustomize/internal/commands/edit/set/setnamespace_test.go

@@ -0,0 +1,89 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package set
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/validators"
+)
+
+const (
+	goodNamespaceValue = "staging"
+)
+
+func TestSetNamespaceHappyPath(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
+	args := []string{goodNamespaceValue}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	expected := []byte(fmt.Sprintf("namespace: %s", goodNamespaceValue))
+	if !strings.Contains(string(content), string(expected)) {
+		t.Errorf("expected namespace in kustomization file")
+	}
+}
+
+func TestSetNamespaceOverride(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteTestKustomization()
+
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
+	args := []string{goodNamespaceValue}
+	err := cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	args = []string{"newnamespace"}
+	err = cmd.RunE(cmd, args)
+	if err != nil {
+		t.Errorf("unexpected cmd error: %v", err)
+	}
+	content, err := fakeFS.ReadTestKustomization()
+	if err != nil {
+		t.Errorf("unexpected read error: %v", err)
+	}
+	expected := []byte("namespace: newnamespace")
+	if !strings.Contains(string(content), string(expected)) {
+		t.Errorf("expected namespace in kustomization file %s", string(content))
+	}
+}
+
+func TestSetNamespaceNoArgs(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
+	err := cmd.Execute()
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if err.Error() != "must specify exactly one namespace value" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}
+
+func TestSetNamespaceInvalid(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+
+	cmd := newCmdSetNamespace(fakeFS, validators.MakeFakeValidator())
+	args := []string{"/badnamespace/"}
+	err := cmd.RunE(cmd, args)
+	if err == nil {
+		t.Errorf("expected error: %v", err)
+	}
+	if !strings.Contains(err.Error(), "is not a valid namespace name") {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+}

kustomize/internal/commands/kustfile/kustomizationfile.go

@@ -0,0 +1,294 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kustfile
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"reflect"
+	"regexp"
+	"strings"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+	"sigs.k8s.io/yaml"
+)
+
+var fieldMarshallingOrder = determineFieldOrder()
+
+// determineFieldOrder returns a slice of Kustomization field
+// names in the preferred order for serialization to a file.
+// The field list is checked against the actual struct type
+// to confirm that all fields are present, and no unknown
+// fields are specified. Deprecated fields are removed from
+// the list, meaning they will drop to the bottom on output
+// (if present). The ordering and/or deprecation of fields
+// in nested structs is not determined or considered.
+func determineFieldOrder() []string {
+	m := make(map[string]bool)
+	s := reflect.ValueOf(&types.Kustomization{}).Elem()
+	typeOfT := s.Type()
+	for i := 0; i < s.NumField(); i++ {
+		m[string(typeOfT.Field(i).Name)] = false
+	}
+
+	ordered := []string{
+		"Resources",
+		"Bases",
+		"NamePrefix",
+		"NameSuffix",
+		"Namespace",
+		"Crds",
+		"CommonLabels",
+		"CommonAnnotations",
+		"PatchesStrategicMerge",
+		"PatchesJson6902",
+		"Patches",
+		"ConfigMapGenerator",
+		"SecretGenerator",
+		"GeneratorOptions",
+		"Vars",
+		"Images",
+		"Replicas",
+		"Configurations",
+		"Generators",
+		"Transformers",
+		"Inventory",
+	}
+
+	// Add deprecated fields here.
+	deprecated := map[string]bool{}
+
+	// Account for the inlined TypeMeta fields.
+	var result []string
+	result = append(result, "APIVersion", "Kind")
+	m["TypeMeta"] = true
+
+	// Make sure all these fields are recognized.
+	for _, n := range ordered {
+		if _, ok := m[n]; ok {
+			m[n] = true
+		} else {
+			log.Fatalf("%s is not a recognized field.", n)
+		}
+		// Keep if not deprecated.
+		if _, f := deprecated[n]; !f {
+			result = append(result, n)
+		}
+	}
+	return result
+}
+
+// commentedField records the comment associated with a kustomization field
+// field has to be a recognized kustomization field
+// comment can be empty
+type commentedField struct {
+	field   string
+	comment []byte
+}
+
+func (cf *commentedField) appendComment(comment []byte) {
+	cf.comment = append(cf.comment, comment...)
+}
+
+func squash(x [][]byte) []byte {
+	return bytes.Join(x, []byte(``))
+}
+
+type kustomizationFile struct {
+	path           string
+	fSys           fs.FileSystem
+	originalFields []*commentedField
+}
+
+// NewKustomizationFile returns a new instance.
+func NewKustomizationFile(fSys fs.FileSystem) (*kustomizationFile, error) { // nolint
+	mf := &kustomizationFile{fSys: fSys}
+	err := mf.validate()
+	if err != nil {
+		return nil, err
+	}
+	return mf, nil
+}
+
+func (mf *kustomizationFile) validate() error {
+	match := 0
+	var path []string
+	for _, kfilename := range pgmconfig.KustomizationFileNames {
+		if mf.fSys.Exists(kfilename) {
+			match += 1
+			path = append(path, kfilename)
+		}
+	}
+
+	switch match {
+	case 0:
+		return fmt.Errorf("Missing kustomization file '%s'.\n", pgmconfig.KustomizationFileNames[0])
+	case 1:
+		mf.path = path[0]
+	default:
+		return fmt.Errorf("Found multiple kustomization file: %v\n", path)
+	}
+
+	if mf.fSys.IsDir(mf.path) {
+		return fmt.Errorf("%s should be a file", mf.path)
+	}
+	return nil
+}
+
+func (mf *kustomizationFile) Read() (*types.Kustomization, error) {
+	data, err := mf.fSys.ReadFile(mf.path)
+	if err != nil {
+		return nil, err
+	}
+	data = types.FixKustomizationPreUnmarshalling(data)
+	var k types.Kustomization
+	err = yaml.Unmarshal(data, &k)
+	if err != nil {
+		return nil, err
+	}
+	k.FixKustomizationPostUnmarshalling()
+	err = mf.parseCommentedFields(data)
+	if err != nil {
+		return nil, err
+	}
+	return &k, err
+}
+
+func (mf *kustomizationFile) Write(kustomization *types.Kustomization) error {
+	if kustomization == nil {
+		return errors.New("util: kustomization file arg is nil")
+	}
+	data, err := mf.marshal(kustomization)
+	if err != nil {
+		return err
+	}
+	return mf.fSys.WriteFile(mf.path, data)
+}
+
+// StringInSlice returns true if the string is in the slice.
+func StringInSlice(str string, list []string) bool {
+	for _, v := range list {
+		if v == str {
+			return true
+		}
+	}
+	return false
+}
+
+func (mf *kustomizationFile) parseCommentedFields(content []byte) error {
+	buffer := bytes.NewBuffer(content)
+	var comments [][]byte
+
+	line, err := buffer.ReadBytes('\n')
+	for err == nil {
+		if isCommentOrBlankLine(line) {
+			comments = append(comments, line)
+		} else {
+			matched, field := findMatchedField(line)
+			if matched {
+				mf.originalFields = append(mf.originalFields, &commentedField{field: field, comment: squash(comments)})
+				comments = [][]byte{}
+			} else if len(comments) > 0 {
+				mf.originalFields[len(mf.originalFields)-1].appendComment(squash(comments))
+				comments = [][]byte{}
+			}
+		}
+		line, err = buffer.ReadBytes('\n')
+	}
+
+	if err != io.EOF {
+		return err
+	}
+	return nil
+}
+
+// marshal converts a kustomization to a byte stream.
+func (mf *kustomizationFile) marshal(kustomization *types.Kustomization) ([]byte, error) {
+	var output []byte
+	for _, comment := range mf.originalFields {
+		output = append(output, comment.comment...)
+		content, err := marshalField(comment.field, kustomization)
+		if err != nil {
+			return content, err
+		}
+		output = append(output, content...)
+	}
+	for _, field := range fieldMarshallingOrder {
+		if mf.hasField(field) {
+			continue
+		}
+		content, err := marshalField(field, kustomization)
+		if err != nil {
+			return content, nil
+		}
+		output = append(output, content...)
+
+	}
+	return output, nil
+}
+
+func (mf *kustomizationFile) hasField(name string) bool {
+	for _, n := range mf.originalFields {
+		if n.field == name {
+			return true
+		}
+	}
+	return false
+}
+
+/*
+ isCommentOrBlankLine determines if a line is a comment or blank line
+ Return true for following lines
+ # This line is a comment
+       # This line is also a comment with several leading white spaces
+
+ (The line above is a blank line)
+*/
+func isCommentOrBlankLine(line []byte) bool {
+	s := bytes.TrimRight(bytes.TrimLeft(line, " "), "\n")
+	return len(s) == 0 || bytes.HasPrefix(s, []byte(`#`))
+}
+
+func findMatchedField(line []byte) (bool, string) {
+	for _, field := range fieldMarshallingOrder {
+		// (?i) is for case insensitive regexp matching
+		r := regexp.MustCompile("^(" + "(?i)" + field + "):")
+		if r.Match(line) {
+			return true, field
+		}
+	}
+	return false, ""
+}
+
+// marshalField marshal a given field of a kustomization object into yaml format.
+// If the field wasn't in the original kustomization.yaml file or wasn't added,
+// an empty []byte is returned.
+func marshalField(field string, kustomization *types.Kustomization) ([]byte, error) {
+	r := reflect.ValueOf(*kustomization)
+	v := r.FieldByName(strings.Title(field))
+
+	if !v.IsValid() || isEmpty(v) {
+		return []byte{}, nil
+	}
+
+	k := &types.Kustomization{}
+	kr := reflect.ValueOf(k)
+	kv := kr.Elem().FieldByName(strings.Title(field))
+	kv.Set(v)
+
+	return yaml.Marshal(k)
+}
+
+func isEmpty(v reflect.Value) bool {
+	// If v is a pointer type
+	if v.Type().Kind() == reflect.Ptr {
+		return v.IsNil()
+	}
+	return v.Len() == 0
+}

kustomize/internal/commands/kustfile/kustomizationfile_test.go

@@ -0,0 +1,337 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kustfile
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/pgmconfig"
+	"sigs.k8s.io/kustomize/v3/pkg/types"
+)
+
+func TestFieldOrder(t *testing.T) {
+	expected := []string{
+		"APIVersion",
+		"Kind",
+		"Resources",
+		"Bases",
+		"NamePrefix",
+		"NameSuffix",
+		"Namespace",
+		"Crds",
+		"CommonLabels",
+		"CommonAnnotations",
+		"PatchesStrategicMerge",
+		"PatchesJson6902",
+		"Patches",
+		"ConfigMapGenerator",
+		"SecretGenerator",
+		"GeneratorOptions",
+		"Vars",
+		"Images",
+		"Replicas",
+		"Configurations",
+		"Generators",
+		"Transformers",
+		"Inventory",
+	}
+	actual := determineFieldOrder()
+	if len(expected) != len(actual) {
+		t.Fatalf("Incorrect field count.")
+	}
+	for i, n := range expected {
+		if n != actual[i] {
+			t.Fatalf("Bad field order.")
+		}
+	}
+}
+
+func TestWriteAndRead(t *testing.T) {
+	kustomization := &types.Kustomization{
+		NamePrefix: "prefix",
+	}
+
+	fSys := fs.MakeFakeFS()
+	fSys.WriteTestKustomization()
+	mf, err := NewKustomizationFile(fSys)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+
+	if err := mf.Write(kustomization); err != nil {
+		t.Fatalf("Couldn't write kustomization file: %v\n", err)
+	}
+
+	content, err := mf.Read()
+	if err != nil {
+		t.Fatalf("Couldn't read kustomization file: %v\n", err)
+	}
+	kustomization.FixKustomizationPostUnmarshalling()
+	if !reflect.DeepEqual(kustomization, content) {
+		t.Fatal("Read kustomization is different from written kustomization")
+	}
+}
+
+func TestNewNotExist(t *testing.T) {
+	fakeFS := fs.MakeFakeFS()
+	_, err := NewKustomizationFile(fakeFS)
+	if err == nil {
+		t.Fatalf("expect an error")
+	}
+	contained := "Missing kustomization file"
+	if !strings.Contains(err.Error(), contained) {
+		t.Fatalf("expect an error contains %q, but got %v", contained, err)
+	}
+	_, err = NewKustomizationFile(fakeFS)
+	if err == nil {
+		t.Fatalf("expect an error")
+	}
+	if !strings.Contains(err.Error(), contained) {
+		t.Fatalf("expect an error contains %q, but got %v", contained, err)
+	}
+}
+
+func TestSecondarySuffix(t *testing.T) {
+	kcontent := `
+configMapGenerator:
+- literals:
+  - foo=bar
+  - baz=qux
+  name: my-configmap
+`
+	fakeFS := fs.MakeFakeFS()
+	fakeFS.WriteFile(pgmconfig.KustomizationFileNames[1], []byte(kcontent))
+	k, err := NewKustomizationFile(fakeFS)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	if k.path != pgmconfig.KustomizationFileNames[1] {
+		t.Fatalf("Load incorrect file path %s", k.path)
+	}
+}
+
+func TestPreserveComments(t *testing.T) {
+	kustomizationContentWithComments := []byte(
+		`# shem qing some comments
+# This is some comment we should preserve
+# don't delete it
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- ../namespaces
+- pod.yaml
+- service.yaml
+# something you may want to keep
+vars:
+- fieldref:
+    fieldPath: metadata.name
+  name: MY_SERVICE_NAME
+  objref:
+    apiVersion: v1
+    kind: Service
+    name: my-service
+# some descriptions for the patches
+patchesStrategicMerge:
+- service.yaml
+- pod.yaml
+`)
+	fSys := fs.MakeFakeFS()
+	fSys.WriteTestKustomizationWith(kustomizationContentWithComments)
+	mf, err := NewKustomizationFile(fSys)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	kustomization, err := mf.Read()
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	if err = mf.Write(kustomization); err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	bytes, _ := fSys.ReadFile(mf.path)
+
+	if !reflect.DeepEqual(kustomizationContentWithComments, bytes) {
+		t.Fatal("written kustomization with comments is not the same as original one")
+	}
+}
+
+func TestPreserveCommentsWithAdjust(t *testing.T) {
+	kustomizationContentWithComments := []byte(`
+
+    
+
+# Some comments
+# This is some comment we should preserve
+# don't delete it
+RESOURCES:
+- ../namespaces
+- pod.yaml
+  # See which field this comment goes into
+- service.yaml
+
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: kustomization
+
+# something you may want to keep
+vars:
+- fieldref:
+    fieldPath: metadata.name
+  name: MY_SERVICE_NAME
+  objref:
+    apiVersion: v1
+    kind: Service
+    name: my-service
+
+# some descriptions for the patches
+
+patchesStrategicMerge:
+- service.yaml
+- pod.yaml
+# generator options
+generatorOptions:
+  disableNameSuffixHash: true
+`)
+
+	expected := []byte(`
+
+    
+
+# Some comments
+# This is some comment we should preserve
+# don't delete it
+  # See which field this comment goes into
+resources:
+- ../namespaces
+- pod.yaml
+- service.yaml
+
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: kustomization
+
+# something you may want to keep
+vars:
+- fieldref:
+    fieldPath: metadata.name
+  name: MY_SERVICE_NAME
+  objref:
+    apiVersion: v1
+    kind: Service
+    name: my-service
+
+# some descriptions for the patches
+
+patchesStrategicMerge:
+- service.yaml
+- pod.yaml
+# generator options
+generatorOptions:
+  disableNameSuffixHash: true
+`)
+	fSys := fs.MakeFakeFS()
+	fSys.WriteTestKustomizationWith(kustomizationContentWithComments)
+	mf, err := NewKustomizationFile(fSys)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+
+	kustomization, err := mf.Read()
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	if err = mf.Write(kustomization); err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	bytes, _ := fSys.ReadFile(mf.path)
+
+	if string(expected) != string(bytes) {
+		t.Fatalf(
+			"expected =\n%s\n\nactual =\n%s\n",
+			string(expected), string(bytes))
+	}
+}
+
+func TestFixPatchesField(t *testing.T) {
+	kustomizationContentWithComments := []byte(`
+patches:
+- patch1.yaml
+- patch2.yaml
+`)
+
+	expected := []byte(`
+patchesStrategicMerge:
+- patch1.yaml
+- patch2.yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+`)
+	fSys := fs.MakeFakeFS()
+	fSys.WriteTestKustomizationWith(kustomizationContentWithComments)
+	mf, err := NewKustomizationFile(fSys)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+
+	kustomization, err := mf.Read()
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	if err = mf.Write(kustomization); err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	bytes, _ := fSys.ReadFile(mf.path)
+
+	if string(expected) != string(bytes) {
+		t.Fatalf(
+			"expected =\n%s\n\nactual =\n%s\n",
+			string(expected), string(bytes))
+	}
+}
+
+func TestFixPatchesFieldForExtendedPatch(t *testing.T) {
+	kustomizationContentWithComments := []byte(`
+patches:
+- path: patch1.yaml
+  target:
+    kind: Deployment
+- path: patch2.yaml
+  target:
+    kind: Service
+`)
+
+	expected := []byte(`
+patches:
+- path: patch1.yaml
+  target:
+    kind: Deployment
+- path: patch2.yaml
+  target:
+    kind: Service
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+`)
+	fSys := fs.MakeFakeFS()
+	fSys.WriteTestKustomizationWith(kustomizationContentWithComments)
+	mf, err := NewKustomizationFile(fSys)
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+
+	kustomization, err := mf.Read()
+	if err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	if err = mf.Write(kustomization); err != nil {
+		t.Fatalf("Unexpected Error: %v", err)
+	}
+	bytes, _ := fSys.ReadFile(mf.path)
+
+	if string(expected) != string(bytes) {
+		t.Fatalf(
+			"expected =\n%s\n\nactual =\n%s\n",
+			string(expected), string(bytes))
+	}
+}

kustomize/internal/commands/misc/config.go

@@ -0,0 +1,101 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package misc
+
+import (
+	"fmt"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+	"sigs.k8s.io/kustomize/v3/pkg/transformers/config/defaultconfig"
+)
+
+// NewCmdConfig returns an instance of 'config' subcommand.
+func NewCmdConfig(fsys fs.FileSystem) *cobra.Command {
+	c := &cobra.Command{
+		Use:   "config",
+		Short: "Config Kustomize transformers",
+		Long:  "",
+		Example: `
+	# Save the default transformer configurations to a local directory
+	kustomize config save -d ~/.kustomize/config
+`,
+		Args: cobra.MinimumNArgs(1),
+	}
+	c.AddCommand(
+		newCmdSave(fsys),
+	)
+	return c
+}
+
+type saveOptions struct {
+	saveDirectory string
+}
+
+func newCmdSave(fsys fs.FileSystem) *cobra.Command {
+	var o saveOptions
+
+	c := &cobra.Command{
+		Use:   "save",
+		Short: "Save default kustomize transformer configurations to a local directory",
+		Long:  "",
+		Example: `
+	# Save the default transformer configurations to a local directory
+	save -d ~/.kustomize/config
+
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate()
+			if err != nil {
+				return err
+			}
+			err = o.Complete(fsys)
+			if err != nil {
+				return err
+			}
+			return o.RunSave(fsys)
+		},
+	}
+	c.Flags().StringVarP(
+		&o.saveDirectory,
+		"directory", "d", "",
+		"Directory to save the default transformer configurations")
+
+	return c
+
+}
+
+// Validate validates the saveOptions is not empty
+func (o *saveOptions) Validate() error {
+	if o.saveDirectory == "" {
+		return fmt.Errorf("must specify one local directory to save the default transformer configurations")
+	}
+	return nil
+}
+
+// Complete creates the save directory when the directory doesn't exist
+func (o *saveOptions) Complete(fsys fs.FileSystem) error {
+	if !fsys.Exists(o.saveDirectory) {
+		return fsys.MkdirAll(o.saveDirectory)
+	}
+	if fsys.IsDir(o.saveDirectory) {
+		return nil
+	}
+	return fmt.Errorf("%s is not a directory", o.saveDirectory)
+}
+
+// RunSave saves the default transformer configurations local directory
+func (o *saveOptions) RunSave(fsys fs.FileSystem) error {
+	m := defaultconfig.GetDefaultFieldSpecsAsMap()
+	for tname, tcfg := range m {
+		filename := filepath.Join(o.saveDirectory, tname+".yaml")
+		err := fsys.WriteFile(filename, []byte(tcfg))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

kustomize/internal/commands/misc/config_test.go

@@ -0,0 +1,74 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package misc
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"testing"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+func TestValidate(t *testing.T) {
+	o := saveOptions{
+		saveDirectory: "",
+	}
+	err := o.Validate()
+	if !strings.Contains(err.Error(), "must specify one local directory") {
+		t.Fatalf("Incorrect error %v", err)
+	}
+
+	o.saveDirectory = "/some/dir"
+	err = o.Validate()
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+}
+
+func TestComplete(t *testing.T) {
+	fsys := fs.MakeFakeFS()
+	fsys.Mkdir("/some/dir")
+	fsys.WriteFile("/some/file", []byte(`some file`))
+
+	type testcase struct {
+		dir    string
+		expect error
+	}
+	testcases := []testcase{
+		{
+			dir:    "/some/dir",
+			expect: nil,
+		},
+		{
+			dir:    "/some/dir/not/existing",
+			expect: nil,
+		},
+		{
+			dir:    "/some/file",
+			expect: fmt.Errorf("%s is not a directory", "/some/file"),
+		},
+	}
+
+	for _, tcase := range testcases {
+		o := saveOptions{saveDirectory: tcase.dir}
+		actual := o.Complete(fsys)
+		if !reflect.DeepEqual(actual, tcase.expect) {
+			t.Fatalf("Expected %v\n but bot %v\n", tcase.expect, actual)
+		}
+	}
+}
+
+func TestRunSave(t *testing.T) {
+	fsys := fs.MakeFakeFS()
+	o := saveOptions{saveDirectory: "/some/dir"}
+	err := o.RunSave(fsys)
+	if err != nil {
+		t.Fatalf("Unexpected error %v", err)
+	}
+	if !fsys.Exists("/some/dir/nameprefix.yaml") {
+		t.Fatal("default configurations are not successfully save.")
+	}
+}

kustomize/internal/commands/misc/version.go

@@ -0,0 +1,73 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package misc
+
+import (
+	"fmt"
+	"io"
+	"runtime"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	kustomizeVersion = "unknown"
+	goos             = runtime.GOOS
+	goarch           = runtime.GOARCH
+	gitCommit        = "$Format:%H$" // sha1 from git, output of $(git rev-parse HEAD)
+
+	buildDate = "1970-01-01T00:00:00Z" // build date in ISO8601 format, output of $(date -u +'%Y-%m-%dT%H:%M:%SZ')
+)
+
+// version returns the version of kustomize.
+type version struct {
+	// KustomizeVersion is a kustomize binary version.
+	KustomizeVersion string `json:"kustomizeVersion"`
+	// GitCommit is a git commit
+	GitCommit string `json:"gitCommit"`
+	// BuildDate is a build date of the binary.
+	BuildDate string `json:"buildDate"`
+	// GoOs holds OS name.
+	GoOs string `json:"goOs"`
+	// GoArch holds architecture name.
+	GoArch string `json:"goArch"`
+}
+
+// getVersion returns version.
+func getVersion() version {
+	return version{
+		kustomizeVersion,
+		gitCommit,
+		buildDate,
+		goos,
+		goarch,
+	}
+}
+
+// Print prints version.
+func (v version) Print(w io.Writer, short bool) {
+	if short {
+		fmt.Fprintf(w, "%s\n", v.KustomizeVersion)
+	} else {
+		fmt.Fprintf(w, "Version: %+v\n", v)
+	}
+
+}
+
+// NewCmdVersion makes version command.
+func NewCmdVersion(w io.Writer) *cobra.Command {
+	var short bool
+
+	versionCmd := cobra.Command{
+		Use:     "version",
+		Short:   "Prints the kustomize version",
+		Example: `kustomize version`,
+		Run: func(cmd *cobra.Command, args []string) {
+			getVersion().Print(w, short)
+		},
+	}
+
+	versionCmd.Flags().BoolVar(&short, "short", false, "print just the version number")
+	return &versionCmd
+}

kustomize/internal/commands/util/util.go

@@ -0,0 +1,65 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package util
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+// GlobPatterns accepts a slice of glob strings and returns the set of
+// matching file paths.
+func GlobPatterns(fsys fs.FileSystem, patterns []string) ([]string, error) {
+	var result []string
+	for _, pattern := range patterns {
+		files, err := fsys.Glob(pattern)
+		if err != nil {
+			return nil, err
+		}
+		if len(files) == 0 {
+			log.Printf("%s has no match", pattern)
+			continue
+		}
+		result = append(result, files...)
+	}
+	return result, nil
+}
+
+// ConvertToMap converts a slice of strings in the form of
+// `key:value` into a map.
+func ConvertToMap(input string, kind string) (map[string]string, error) {
+	result := make(map[string]string)
+	if input == "" {
+		return result, nil
+	}
+	inputs := strings.Split(input, ",")
+	for _, input := range inputs {
+		c := strings.Index(input, ":")
+		if c == 0 {
+			// key is not passed
+			return nil, fmt.Errorf("invalid %s: '%s' (%s)", kind, input, "need k:v pair where v may be quoted")
+		} else if c < 0 {
+			// only key passed
+			result[input] = ""
+		} else {
+			// both key and value passed
+			key := input[:c]
+			value := trimQuotes(input[c+1:])
+			result[key] = value
+		}
+	}
+	return result, nil
+}
+
+func trimQuotes(s string) string {
+	if len(s) >= 2 {
+		if s[0] == '"' && s[len(s)-1] == '"' {
+			return s[1 : len(s)-1]
+		}
+	}
+	return s
+}

kustomize/internal/commands/util/util_test.go

@@ -0,0 +1,37 @@
+package util
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestConvertToMap(t *testing.T) {
+	args := "a:b,c:\"d\",e:\"f:g\",g:h:k"
+	expected := make(map[string]string)
+	expected["a"] = "b"
+	expected["c"] = "d"
+	expected["e"] = "f:g"
+	expected["g"] = "h:k"
+
+	result, err := ConvertToMap(args, "annotation")
+	if err != nil {
+		t.Errorf("unexpected error: %v", err.Error())
+	}
+
+	eq := reflect.DeepEqual(expected, result)
+	if !eq {
+		t.Errorf("Converted map does not match expected, expected: %v, result: %v\n", expected, result)
+	}
+}
+
+func TestConvertToMapError(t *testing.T) {
+	args := "a:b,c:\"d\",:f:g"
+
+	_, err := ConvertToMap(args, "annotation")
+	if err == nil {
+		t.Errorf("expected an error")
+	}
+	if err.Error() != "invalid annotation: ':f:g' (need k:v pair where v may be quoted)" {
+		t.Errorf("incorrect error: %v", err.Error())
+	}
+}

kustomize/main.go

@@ -0,0 +1,17 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"os"
+
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands"
+)
+
+func main() {
+	if err := commands.NewDefaultCommand().Execute(); err != nil {
+		os.Exit(1)
+	}
+	os.Exit(0)
+}