package plugin import ( "encoding/json" "fmt" "io" "os" "path/filepath" "github.com/Sirupsen/logrus" "github.com/docker/distribution/reference" "github.com/docker/docker/api/types" "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" "github.com/docker/docker/pkg/archive" "github.com/spf13/cobra" "golang.org/x/net/context" ) // validateTag checks if the given repoName can be resolved. func validateTag(rawRepo string) error { _, err := reference.ParseNormalizedNamed(rawRepo) return err } // validateConfig ensures that a valid config.json is available in the given path func validateConfig(path string) error { dt, err := os.Open(filepath.Join(path, "config.json")) if err != nil { return err } m := types.PluginConfig{} err = json.NewDecoder(dt).Decode(&m) dt.Close() return err } // validateContextDir validates the given dir and returns abs path on success. func validateContextDir(contextDir string) (string, error) { absContextDir, err := filepath.Abs(contextDir) if err != nil { return "", err } stat, err := os.Lstat(absContextDir) if err != nil { return "", err } if !stat.IsDir() { return "", fmt.Errorf("context must be a directory") } return absContextDir, nil } type pluginCreateOptions struct { repoName string context string compress bool } func newCreateCommand(dockerCli *command.DockerCli) *cobra.Command { options := pluginCreateOptions{} cmd := &cobra.Command{ Use: "create [OPTIONS] PLUGIN PLUGIN-DATA-DIR", Short: "Create a plugin from a rootfs and configuration. Plugin data directory must contain config.json and rootfs directory.", Args: cli.RequiresMinArgs(2), RunE: func(cmd *cobra.Command, args []string) error { options.repoName = args[0] options.context = args[1] return runCreate(dockerCli, options) }, } flags := cmd.Flags() flags.BoolVar(&options.compress, "compress", false, "Compress the context using gzip") return cmd } func runCreate(dockerCli *command.DockerCli, options pluginCreateOptions) error { var ( createCtx io.ReadCloser err error ) if err := validateTag(options.repoName); err != nil { return err } absContextDir, err := validateContextDir(options.context) if err != nil { return err } if err := validateConfig(options.context); err != nil { return err } compression := archive.Uncompressed if options.compress { logrus.Debugf("compression enabled") compression = archive.Gzip } createCtx, err = archive.TarWithOptions(absContextDir, &archive.TarOptions{ Compression: compression, }) if err != nil { return err } ctx := context.Background() createOptions := types.PluginCreateOptions{RepoName: options.repoName} if err = dockerCli.Client().PluginCreate(ctx, createCtx, createOptions); err != nil { return err } fmt.Fprintln(dockerCli.Out(), options.repoName) return nil }