Add set imagetag command

pkg/commands/setimagetag.go

@@ -0,0 +1,120 @@
+/*
+Copyright 2018 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"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"github.com/kubernetes-sigs/kustomize/pkg/constants"
+	"github.com/kubernetes-sigs/kustomize/pkg/fs"
+	"github.com/kubernetes-sigs/kustomize/pkg/types"
+	"sort"
+)
+
+type setImageTagOptions struct {
+	imageTagMap map[string]string
+}
+
+// newCmdSetImageTag sets the new tags for images in the kustomization.
+func newCmdSetImageTag(fsys fs.FileSystem) *cobra.Command {
+	var o setImageTagOptions
+
+	cmd := &cobra.Command{
+		Use:   "imagetag",
+		Short: "Sets images and their new tags in the kustomization file",
+		Example: `
+The command
+  set imagetag nginx:1.8.0 my-app:latest
+will add 
+
+imageTags:
+- name: nginx
+  newTag: 1.8.0
+- name: my-app
+  newTag: latest
+
+to the kustomization file if it doesn't exist,
+and overwrite the previous newTag if the image name exists.
+`,
+		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.RunSetImageTags(fsys)
+		},
+	}
+	return cmd
+}
+
+// Validate validates setImageTag command.
+func (o *setImageTagOptions) Validate(args []string) error {
+	if len(args) == 0 {
+		return errors.New("No image and newTag specified.")
+	}
+	o.imageTagMap = make(map[string]string)
+	for _, arg := range args {
+		imagetag := strings.Split(arg, ":")
+		if len(imagetag) != 2 {
+			return errors.New("Invalid format of imagetag, must specify it as <image>:<newtag>")
+		}
+		o.imageTagMap[imagetag[0]] = imagetag[1]
+	}
+	return nil
+}
+
+// Complete completes setImageTag command.
+func (o *setImageTagOptions) Complete(cmd *cobra.Command, args []string) error {
+	return nil
+}
+
+// RunSetImageTags runs setImageTags command (does real work).
+func (o *setImageTagOptions) RunSetImageTags(fsys fs.FileSystem) error {
+	mf, err := newKustomizationFile(constants.KustomizationFileName, fsys)
+	if err != nil {
+		return err
+	}
+	m, err := mf.read()
+	if err != nil {
+		return err
+	}
+	imageTagMap := map[string]string{}
+	for _, it := range m.ImageTags {
+		imageTagMap[it.Name] = it.NewTag
+	}
+	for key, value := range o.imageTagMap {
+		imageTagMap[key] = value
+	}
+	var imageTags []types.ImageTag
+	for key, value := range imageTagMap {
+		imageTags = append(imageTags, types.ImageTag{Name: key, NewTag: value})
+	}
+	sort.Slice(imageTags, func(i, j int) bool {
+		return imageTags[i].Name < imageTags[j].Name
+	})
+
+	m.ImageTags = imageTags
+
+	return mf.write(m)
+}