Example #1
0
func runPull(dockerCli *client.DockerCli, opts pullOptions) error {
	distributionRef, err := reference.ParseNamed(opts.remote)
	if err != nil {
		return err
	}
	if opts.all && !reference.IsNameOnly(distributionRef) {
		return errors.New("tag can't be used with --all-tags/-a")
	}

	if !opts.all && reference.IsNameOnly(distributionRef) {
		distributionRef = reference.WithDefaultTag(distributionRef)
		fmt.Fprintf(dockerCli.Out(), "Using default tag: %s\n", reference.DefaultTag)
	}

	var tag string
	switch x := distributionRef.(type) {
	case reference.Canonical:
		tag = x.Digest().String()
	case reference.NamedTagged:
		tag = x.Tag()
	}

	registryRef := registry.ParseReference(tag)

	// Resolve the Repository name from fqn to RepositoryInfo
	repoInfo, err := registry.ParseRepositoryInfo(distributionRef)
	if err != nil {
		return err
	}

	ctx := context.Background()

	authConfig := dockerCli.ResolveAuthConfig(ctx, repoInfo.Index)
	requestPrivilege := dockerCli.RegistryAuthenticationPrivilegedFunc(repoInfo.Index, "pull")

	if client.IsTrusted() && !registryRef.HasDigest() {
		// Check if tag is digest
		err = dockerCli.TrustedPull(ctx, repoInfo, registryRef, authConfig, requestPrivilege)
	} else {
		err = dockerCli.ImagePullPrivileged(ctx, authConfig, distributionRef.String(), requestPrivilege, opts.all)
	}
	if err != nil {
		if strings.Contains(err.Error(), "target is a plugin") {
			return errors.New(err.Error() + " - Use `docker plugin install`")
		}
		return err
	}

	return nil
}