Add subcommand for adding patches to the kustomization file.

commands/addpatch.go

@@ -0,0 +1,96 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package commands
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+
+	"k8s.io/kubectl/pkg/kustomize/constants"
+	"k8s.io/kubectl/pkg/kustomize/util/fs"
+)
+
+type addPatchOptions struct {
+	patchFilePath string
+}
+
+// newCmdAddPatch adds the name of a file containing a patch to the kustomization file.
+func newCmdAddPatch(out, errOut io.Writer, 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(out, errOut, fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates addPatch command.
+func (o *addPatchOptions) Validate(args []string) error {
+	if len(args) != 1 {
+		return errors.New("must specify a patch file")
+	}
+	o.patchFilePath = args[0]
+	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(out, errOut io.Writer, fsys fs.FileSystem) error {
+	_, err := fsys.Stat(o.patchFilePath)
+	if err != nil {
+		return err
+	}
+
+	mf, err := newKustomizationFile(constants.KustomizationFileName, fsys)
+	if err != nil {
+		return err
+	}
+
+	m, err := mf.read()
+	if err != nil {
+		return err
+	}
+
+	if stringInSlice(o.patchFilePath, m.Patches) {
+		return fmt.Errorf("patch %s already in kustomization file", o.patchFilePath)
+	}
+
+	m.Patches = append(m.Patches, o.patchFilePath)
+
+	return mf.write(m)
+}