Migrate pull command to cobra

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

api/client/commands.go

@@ -11,7 +11,6 @@ func (cli *DockerCli) Command(name string) func(...string) error {
 		"login":   cli.CmdLogin,
 		"logout":  cli.CmdLogout,
 		"ps":      cli.CmdPs,
-		"pull":    cli.CmdPull,
 		"push":    cli.CmdPush,
 		"update":  cli.CmdUpdate,
 	}[name]

api/client/image/pull.go

@@ -0,0 +1,86 @@
+package image
+
+import (
+	"errors"
+	"fmt"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/client"
+	"github.com/docker/docker/cli"
+	"github.com/docker/docker/reference"
+	"github.com/docker/docker/registry"
+	"github.com/spf13/cobra"
+)
+
+type pullOptions struct {
+	remote string
+	all    bool
+}
+
+// NewPullCommand creates a new `docker pull` command
+func NewPullCommand(dockerCli *client.DockerCli) *cobra.Command {
+	var opts pullOptions
+
+	cmd := &cobra.Command{
+		Use:   "pull [OPTIONS] NAME[:TAG|@DIGEST]",
+		Short: "Pull an image or a repository from a registry",
+		Args:  cli.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.remote = args[0]
+			return runPull(dockerCli, opts)
+		},
+	}
+
+	flags := cmd.Flags()
+
+	flags.BoolVarP(&opts.all, "all-tags", "a", false, "Download all tagged images in the repository")
+	client.AddTrustedFlags(flags, true)
+
+	return cmd
+}
+
+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
+		return dockerCli.TrustedPull(ctx, repoInfo, registryRef, authConfig, requestPrivilege)
+	}
+
+	return dockerCli.ImagePullPrivileged(ctx, authConfig, distributionRef.String(), requestPrivilege, opts.all)
+
+}

api/client/pull.go

@@ -1,74 +1,14 @@
 package client
 
 import (
-	"errors"
-	"fmt"
-
 	"golang.org/x/net/context"
 
-	Cli "github.com/docker/docker/cli"
 	"github.com/docker/docker/pkg/jsonmessage"
-	flag "github.com/docker/docker/pkg/mflag"
-	"github.com/docker/docker/reference"
-	"github.com/docker/docker/registry"
 	"github.com/docker/engine-api/types"
 )
 
-// CmdPull pulls an image or a repository from the registry.
-//
-// Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST]
-func (cli *DockerCli) CmdPull(args ...string) error {
-	cmd := Cli.Subcmd("pull", []string{"NAME[:TAG|@DIGEST]"}, Cli.DockerCommands["pull"].Description, true)
-	allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
-	addTrustedFlags(cmd, true)
-	cmd.Require(flag.Exact, 1)
-
-	cmd.ParseFlags(args, true)
-	remote := cmd.Arg(0)
-
-	distributionRef, err := reference.ParseNamed(remote)
-	if err != nil {
-		return err
-	}
-	if *allTags && !reference.IsNameOnly(distributionRef) {
-		return errors.New("tag can't be used with --all-tags/-a")
-	}
-
-	if !*allTags && reference.IsNameOnly(distributionRef) {
-		distributionRef = reference.WithDefaultTag(distributionRef)
-		fmt.Fprintf(cli.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 := cli.ResolveAuthConfig(ctx, repoInfo.Index)
-	requestPrivilege := cli.RegistryAuthenticationPrivilegedFunc(repoInfo.Index, "pull")
-
-	if IsTrusted() && !registryRef.HasDigest() {
-		// Check if tag is digest
-		return cli.trustedPull(ctx, repoInfo, registryRef, authConfig, requestPrivilege)
-	}
-
-	return cli.imagePullPrivileged(ctx, authConfig, distributionRef.String(), requestPrivilege, *allTags)
-}
-
-func (cli *DockerCli) imagePullPrivileged(ctx context.Context, authConfig types.AuthConfig, ref string, requestPrivilege types.RequestPrivilegeFunc, all bool) error {
+// ImagePullPrivileged pulls the image and displays it to the output
+func (cli *DockerCli) ImagePullPrivileged(ctx context.Context, authConfig types.AuthConfig, ref string, requestPrivilege types.RequestPrivilegeFunc, all bool) error {
 
 	encodedAuth, err := EncodeAuthToBase64(authConfig)
 	if err != nil {

api/client/trust.go

@@ -51,7 +51,7 @@ func addTrustedFlags(fs *flag.FlagSet, verify bool) {
 	fs.BoolVar(&untrusted, []string{"-disable-content-trust"}, !trusted, message)
 }
 
-// AddTrustedFlags adds the trust flags to a FlagSet
+// AddTrustedFlags adds content trust flags to the current command flagset
 func AddTrustedFlags(fs *pflag.FlagSet, verify bool) {
 	trusted, message := setupTrustedFlag(verify)
 	fs.BoolVar(&untrusted, "disable-content-trust", !trusted, message)
@@ -314,7 +314,8 @@ func notaryError(repoName string, err error) error {
 	return err
 }
 
-func (cli *DockerCli) trustedPull(ctx context.Context, repoInfo *registry.RepositoryInfo, ref registry.Reference, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
+// TrustedPull handles content trust pulling of an image
+func (cli *DockerCli) TrustedPull(ctx context.Context, repoInfo *registry.RepositoryInfo, ref registry.Reference, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
 	var refs []target
 
 	notaryRepo, err := cli.getNotaryRepository(repoInfo, authConfig, "pull")
@@ -376,7 +377,7 @@ func (cli *DockerCli) trustedPull(ctx context.Context, repoInfo *registry.Reposi
 		if err != nil {
 			return err
 		}
-		if err := cli.imagePullPrivileged(ctx, authConfig, ref.String(), requestPrivilege, false); err != nil {
+		if err := cli.ImagePullPrivileged(ctx, authConfig, ref.String(), requestPrivilege, false); err != nil {
 			return err
 		}
 

cli/cobraadaptor/adaptor.go

@@ -59,6 +59,7 @@ func NewCobraAdaptor(clientFlags *cliflags.ClientFlags) CobraAdaptor {
 		image.NewLoadCommand(dockerCli),
 		image.NewRemoveCommand(dockerCli),
 		image.NewSaveCommand(dockerCli),
+		image.NewPullCommand(dockerCli),
 		image.NewSearchCommand(dockerCli),
 		image.NewImportCommand(dockerCli),
 		image.NewTagCommand(dockerCli),

cli/usage.go

@@ -16,7 +16,6 @@ var DockerCommandUsage = []Command{
 	{"login", "Log in to a Docker registry"},
 	{"logout", "Log out from a Docker registry"},
 	{"ps", "List containers"},
-	{"pull", "Pull an image or a repository from a registry"},
 	{"push", "Push an image or a repository to a registry"},
 	{"update", "Update configuration of one or more containers"},
 }