Remove deprecated "daemon" subcommand

The `docker daemon` subcommand was only present for
backward compatibility, but deprecated in v1.13,
and scheduled for removal in v17.12

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cmd/docker/daemon_none.go

@@ -1,29 +0,0 @@
-// +build !daemon
-
-package main
-
-import (
-	"fmt"
-	"runtime"
-	"strings"
-
-	"github.com/spf13/cobra"
-)
-
-func newDaemonCommand() *cobra.Command {
-	return &cobra.Command{
-		Use:                "daemon",
-		Hidden:             true,
-		Args:               cobra.ArbitraryArgs,
-		DisableFlagParsing: true,
-		RunE: func(cmd *cobra.Command, args []string) error {
-			return runDaemon()
-		},
-	}
-}
-
-func runDaemon() error {
-	return fmt.Errorf(
-		"`docker daemon` is not supported on %s. Please run `dockerd` directly",
-		strings.Title(runtime.GOOS))
-}

cmd/docker/daemon_none_test.go

@@ -1,17 +0,0 @@
-// +build !daemon
-
-package main
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestDaemonCommand(t *testing.T) {
-	cmd := newDaemonCommand()
-	cmd.SetArgs([]string{"--version"})
-	err := cmd.Execute()
-
-	assert.EqualError(t, err, "Please run `dockerd`")
-}

cmd/docker/daemon_unit_test.go

@@ -1,33 +0,0 @@
-// +build daemon
-
-package main
-
-import (
-	"io/ioutil"
-	"testing"
-
-	"github.com/spf13/cobra"
-	"github.com/stretchr/testify/assert"
-)
-
-func stubRun(cmd *cobra.Command, args []string) error {
-	return nil
-}
-
-func TestDaemonCommandHelp(t *testing.T) {
-	cmd := newDaemonCommand()
-	cmd.RunE = stubRun
-	cmd.SetArgs([]string{"--help"})
-	cmd.SetOutput(ioutil.Discard)
-	err := cmd.Execute()
-	assert.NoError(t, err)
-}
-
-func TestDaemonCommand(t *testing.T) {
-	cmd := newDaemonCommand()
-	cmd.RunE = stubRun
-	cmd.SetArgs([]string{"--containerd", "/foo"})
-	cmd.SetOutput(ioutil.Discard)
-	err := cmd.Execute()
-	assert.NoError(t, err)
-}

cmd/docker/daemon_unix.go

@@ -1,79 +0,0 @@
-// +build daemon
-
-package main
-
-import (
-	"fmt"
-
-	"os"
-	"os/exec"
-	"path/filepath"
-	"syscall"
-
-	"github.com/spf13/cobra"
-)
-
-const daemonBinary = "dockerd"
-
-func newDaemonCommand() *cobra.Command {
-	cmd := &cobra.Command{
-		Use:                "daemon",
-		Hidden:             true,
-		Args:               cobra.ArbitraryArgs,
-		DisableFlagParsing: true,
-		RunE: func(cmd *cobra.Command, args []string) error {
-			return runDaemon()
-		},
-		Deprecated: "and will be removed in Docker 17.12. Please run `dockerd` directly.",
-	}
-	cmd.SetHelpFunc(helpFunc)
-	return cmd
-}
-
-// CmdDaemon execs dockerd with the same flags
-func runDaemon() error {
-	// Use os.Args[1:] so that "global" args are passed to dockerd
-	return execDaemon(stripDaemonArg(os.Args[1:]))
-}
-
-func execDaemon(args []string) error {
-	binaryPath, err := findDaemonBinary()
-	if err != nil {
-		return err
-	}
-
-	return syscall.Exec(
-		binaryPath,
-		append([]string{daemonBinary}, args...),
-		os.Environ())
-}
-
-func helpFunc(cmd *cobra.Command, args []string) {
-	if err := execDaemon([]string{"--help"}); err != nil {
-		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
-	}
-}
-
-// findDaemonBinary looks for the path to the dockerd binary starting with
-// the directory of the current executable (if one exists) and followed by $PATH
-func findDaemonBinary() (string, error) {
-	execDirname := filepath.Dir(os.Args[0])
-	if execDirname != "" {
-		binaryPath := filepath.Join(execDirname, daemonBinary)
-		if _, err := os.Stat(binaryPath); err == nil {
-			return binaryPath, nil
-		}
-	}
-
-	return exec.LookPath(daemonBinary)
-}
-
-// stripDaemonArg removes the `daemon` argument from the list
-func stripDaemonArg(args []string) []string {
-	for i, arg := range args {
-		if arg == "daemon" {
-			return append(args[:i], args[i+1:]...)
-		}
-	}
-	return args
-}

cmd/docker/docker.go

@@ -39,10 +39,6 @@ func newDockerCommand(dockerCli *command.DockerCli) *cobra.Command {
 			return command.ShowHelp(dockerCli.Err())(cmd, args)
 		},
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			// daemon command is special, we redirect directly to another binary
-			if cmd.Name() == "daemon" {
-				return nil
-			}
 			// flags must be the top-level command flags, not cmd.Flags()
 			opts.Common.SetDefaultOptions(flags)
 			dockerPreRun(opts)
@@ -64,7 +60,6 @@ func newDockerCommand(dockerCli *command.DockerCli) *cobra.Command {
 	setHelpFunc(dockerCli, cmd, flags, opts)
 
 	cmd.SetOutput(dockerCli.Out())
-	cmd.AddCommand(newDaemonCommand())
 	commands.AddCommands(cmd, dockerCli)
 
 	setValidateArgs(dockerCli, cmd, flags, opts)

docs/deprecated.md

@@ -81,7 +81,7 @@ The `filter` param to filter the list of image by reference (name or name:tag) i
 ### `docker daemon` subcommand
 **Deprecated In Release: [v1.13.0](https://github.com/docker/docker/releases/tag/v1.13.0)**
 
-**Target For Removal In Release: v17.12**
+**Removed In Release: v17.12**
 
 The daemon is moved to a separate binary (`dockerd`), and should be used instead.
 

man/src/image/pull.md

@@ -134,7 +134,7 @@ Registry credentials are managed by **docker-login(1)**.
 
 Docker uses the `https://` protocol to communicate with a registry, unless the
 registry is allowed to be accessed over an insecure connection. Refer to the
-[insecure registries](https://docs.docker.com/engine/reference/commandline/daemon/#insecure-registries)
+[insecure registries](https://docs.docker.com/engine/reference/commandline/dockerd/#insecure-registries)
 section in the online documentation for more information.
 
 

scripts/test/unit

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 set -eu -o pipefail
 
-go test -tags daemon -v "$@"
+go test -v "$@"