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‎.gitignore‎

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main
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.idea
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.DS_Store
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docker-utils

‎LICENSE‎

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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‎cmd/pull-push.go‎

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// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"fmt"
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"os"
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"strings"
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"github.com/bharat-p/goutils/cli"
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"github.com/spf13/cobra"
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jww "github.com/spf13/jwalterweatherman"
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)
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// pushCmd represents the push command
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var pullPushCmd = &cobra.Command{
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Use: "pull-push",
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Short: "Pull and push images between repositories",
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Long: `Pull images from one docker registry and push it to another.`,
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Run: func(cmd *cobra.Command, args []string) {
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var pull, push, tagLocal bool
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if Verbose {
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jww.SetStdoutThreshold(jww.LevelInfo)
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}
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// TODO: Work your own magic here
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pullFrom, _ := cmd.Flags().GetString("from")
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pushTo, _ := cmd.Flags().GetString("to")
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pullFrom = strings.TrimSuffix(strings.TrimSpace(pullFrom), "/")
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pushTo = strings.TrimSuffix(strings.TrimSpace(pushTo), "/")
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if pullFrom == "" && pushTo == "" {
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jww.ERROR.Printf("Error: %s\n", "Please specify either --from or --to ")
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cmd.Usage()
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os.Exit(1)
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}
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tagLocal, _ = cmd.Flags().GetBool("local")
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if pushTo != "" {
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push = true
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pushTo += "/"
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}
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if pullFrom != "" {
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pull = true
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pullFrom += "/"
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} else if tagLocal {
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jww.ERROR.Printf("Error: %s\n", "--local ( -l) can only be used with --from flag ")
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cmd.Usage()
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os.Exit(1)
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}
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varRemoveImage, _ := cmd.Flags().GetBool("remove")
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imageNames := []string{}
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images, _ := cmd.Flags().GetStringArray("images")
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for _, imageOption := range images {
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for _, imageVal := range strings.Split(imageOption, ",") {
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imageVal = strings.TrimSpace(imageVal)
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if imageVal != "" {
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imageNames = append(imageNames, imageVal)
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}
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}
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}
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if len(imageNames) <= 0 {
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jww.ERROR.Printf("Error: %s\n", "Please specify atlease one image name.")
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cmd.Usage()
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os.Exit(1)
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}
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for _, image := range imageNames {
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pullImageName := fmt.Sprintf("%s%s", pullFrom, image)
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if pull {
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err := pullImage(pullImageName)
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if err != nil {
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jww.ERROR.Printf("Failed to pull image: %s\n", pullImageName)
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jww.ERROR.Printf("%s\n", err)
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continue
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}
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if tagLocal {
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tagImage(pullImageName, image)
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}
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}
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if push {
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pushImageName := fmt.Sprintf("%s%s", pushTo, image)
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tagImage(pullImageName, pushImageName)
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err := pushImage(pushImageName)
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if err != nil {
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fmt.Printf("Error:%s\n", err)
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} else if varRemoveImage {
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removeImage(pushImageName)
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}
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}
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if varRemoveImage && pull {
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removeImage(pullImageName)
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}
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}
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},
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}
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func init() {
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RootCmd.AddCommand(pullPushCmd)
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pullPushCmd.Flags().StringP("from", "f", "", "Registry from where to pull images")
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pullPushCmd.Flags().StringP("to", "t", "", "Registry to push images")
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pullPushCmd.Flags().BoolP("local", "l", false, "Tag as local (applicable with --from only if --to is not used)")
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pullPushCmd.Flags().BoolP("remove", "r", false, "Remove images after pull/push is done.")
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pullPushCmd.Flags().StringArrayP("images", "i", []string{}, "Image(s) to pull/push")
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}
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func pullImage(imageName string) (err error) {
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jww.INFO.Printf("Pulling image %s", imageName)
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_, err = cli.RunCommand(DockerBinary, "pull", imageName)
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return err
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}
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func removeImage(imageName string) (err error) {
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jww.INFO.Printf("Removing image %s", imageName)
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_, err = cli.RunCommand(DockerBinary, "rmi", imageName)
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return err
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}
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func tagImage(imageName string, tagAs string) (err error) {
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jww.INFO.Printf("Tagging image %s as %s", imageName, tagAs)
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_, err = cli.RunCommand(DockerBinary, "tag", imageName, tagAs)
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return err
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}
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func pushImage(imageName string) (err error) {
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jww.INFO.Printf("Pushing image %s", imageName)
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_, err = cli.RunCommand(DockerBinary, "push", imageName)
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return err
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}

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