kustomize edit add replacement

kustomize/commands/edit/add/addreplacement.go

@@ -0,0 +1,79 @@
+// Copyright 2023 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/api/konfig"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kustomize/v5/commands/internal/kustfile"
+	"sigs.k8s.io/kustomize/kyaml/filesys"
+)
+
+type addReplacementOptions struct {
+	Replacement types.ReplacementField
+}
+
+func newCmdAddReplacement(fSys filesys.FileSystem) *cobra.Command {
+	var o addReplacementOptions
+	cmd := &cobra.Command{
+		Use:   "replacement",
+		Short: "add an item to replacement field",
+		Long: `this command will add an item to  replacement field in the kustomization file.
+The item must be either a file, or an inline string.
+`,
+		Example: `
+	# Adds a replacement file to the kustomization file
+	kustomize edit add replacement --path {filepath}
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			err := o.Validate()
+			if err != nil {
+				return err
+			}
+			return o.RunAddReplacement(fSys)
+		},
+	}
+
+	cmd.Flags().StringVar(&o.Replacement.Path, "path", "", "Path to the replacement file.")
+	return cmd
+}
+
+// Validate validate add replacement command
+func (o *addReplacementOptions) Validate() error {
+	if o.Replacement.Path == "" {
+		return errors.New("must provide path to add replacement")
+	}
+	return nil
+}
+
+// RunAddReplacement runs addReplacement command
+func (o *addReplacementOptions) RunAddReplacement(fSys filesys.FileSystem) error {
+	mf, err := kustfile.NewKustomizationFile(fSys)
+	if err != nil {
+		return fmt.Errorf("failed to load kustomization file: %w", err)
+	}
+
+	m, err := mf.Read()
+	if err != nil {
+		return fmt.Errorf("failed to read kustomization file: %w", err)
+	}
+
+	for _, r := range m.Replacements {
+		if len(r.Path) > 0 && r.Path == o.Replacement.Path {
+			return fmt.Errorf("replacement for path %q already in %s file", r.Path, konfig.DefaultKustomizationFileName())
+		}
+	}
+	m.Replacements = append(m.Replacements, o.Replacement)
+
+	err = mf.Write(m)
+	if err != nil {
+		return fmt.Errorf("failed to write kustomization file: %w", err)
+	}
+
+	return nil
+}

kustomize/commands/edit/add/addreplacement_test.go

@@ -0,0 +1,72 @@
+// Copyright 2023 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package add
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"sigs.k8s.io/kustomize/kustomize/v5/commands/internal/kustfile"
+	testutils_test "sigs.k8s.io/kustomize/kustomize/v5/commands/internal/testutils"
+	"sigs.k8s.io/kustomize/kyaml/filesys"
+)
+
+const (
+	replaceFileName    = "replacement.yaml"
+	replaceFileContent = `this is just a test file`
+)
+
+func TestAddReplacementWithFilePath(t *testing.T) {
+	fSys := filesys.MakeEmptyDirInMemory()
+	err := fSys.WriteFile(replaceFileName, []byte(replaceFileContent))
+	require.NoError(t, err)
+	testutils_test.WriteTestKustomization(fSys)
+
+	cmd := newCmdAddReplacement(fSys)
+	args := []string{
+		"--path", patchFileName,
+	}
+	cmd.SetArgs(args)
+	assert.NoError(t, cmd.Execute())
+	_, err = testutils_test.ReadTestKustomization(fSys)
+	assert.NoError(t, err)
+
+	kf, err := kustfile.NewKustomizationFile(fSys)
+	require.NoError(t, err)
+
+	kustomization, err := kf.Read()
+	require.NoError(t, err)
+
+	expectedPath := []string{replaceFileName, patchFileName}
+
+	for k, replacement := range kustomization.Replacements {
+		require.Equal(t, expectedPath[k], replacement.Path)
+	}
+}
+
+func TestAddReplacementAlreadyThere(t *testing.T) {
+	fSys := filesys.MakeEmptyDirInMemory()
+	err := fSys.WriteFile(replaceFileName, []byte(replaceFileContent))
+	require.NoError(t, err)
+	testutils_test.WriteTestKustomization(fSys)
+
+	cmd := newCmdAddReplacement(fSys)
+	args := []string{
+		"--path", patchFileName,
+	}
+	cmd.SetArgs(args)
+	assert.NoError(t, cmd.Execute())
+
+	assert.Error(t, cmd.Execute())
+}
+
+func TestAddReplacementNoArgs(t *testing.T) {
+	fSys := filesys.MakeEmptyDirInMemory()
+
+	cmd := newCmdAddReplacement(fSys)
+	err := cmd.Execute()
+	assert.Error(t, err)
+	assert.Equal(t, "must provide path to add replacement", err.Error())
+}

kustomize/commands/edit/add/all.go

@@ -47,6 +47,9 @@ func NewCmdAdd(
 
 	# Adds a transformer configuration to the kustomization
 	kustomize edit add transformer <filepath>
+
+	# Adds a replacement to the kustomization
+	kustomize edit add replacement --path {filepath}
 `,
 		Args: cobra.MinimumNArgs(1),
 	}
@@ -62,6 +65,7 @@ func NewCmdAdd(
 		newCmdAddAnnotation(fSys, ldr.Validator().MakeAnnotationValidator()),
 		newCmdAddTransformer(fSys),
 		newCmdAddGenerator(fSys),
+		newCmdAddReplacement(fSys),
 	)
 	return c
 }