Isolated content of pkg/kustomize

pkg/commands/set_name_prefix.go

@@ -0,0 +1,88 @@
+/*
+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"
+	"io"
+
+	"github.com/spf13/cobra"
+
+	"k8s.io/kubectl/pkg/kustomize/constants"
+	"k8s.io/kubectl/pkg/kustomize/util/fs"
+)
+
+type setNamePrefixOptions struct {
+	prefix string
+}
+
+// newCmdSetNamePrefix sets the value of the namePrefix field in the kustomization.
+func newCmdSetNamePrefix(out, errOut io.Writer, 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(out, errOut, 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(out, errOut io.Writer, fsys fs.FileSystem) error {
+	mf, err := newKustomizationFile(constants.KustomizationFileName, fsys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.read()
+	if err != nil {
+		return err
+	}
+	m.NamePrefix = o.prefix
+	return mf.write(m)
+}