blob: cbdb6a859deb54df8d05fc1f134980e2393f9ffe [file] [log] [blame]
package main
import (
flag ""
type command struct {
name string
description string
type byName []command
func (a byName) Len() int { return len(a) }
func (a byName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a byName) Less(i, j int) bool { return a[i].name < a[j].name }
var (
dockerCertPath = os.Getenv("DOCKER_CERT_PATH")
dockerTlsVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
dockerCommands = []command{
{"attach", "Attach to a running container"},
{"build", "Build an image from a Dockerfile"},
{"commit", "Create a new image from a container's changes"},
{"cp", "Copy files/folders from a container's filesystem to the host path"},
{"create", "Create a new container"},
{"diff", "Inspect changes on a container's filesystem"},
{"events", "Get real time events from the server"},
{"exec", "Run a command in a running container"},
{"export", "Stream the contents of a container as a tar archive"},
{"history", "Show the history of an image"},
{"images", "List images"},
{"import", "Create a new filesystem image from the contents of a tarball"},
{"info", "Display system-wide information"},
{"inspect", "Return low-level information on a container or image"},
{"kill", "Kill a running container"},
{"load", "Load an image from a tar archive"},
{"login", "Register or log in to a Docker registry server"},
{"logout", "Log out from a Docker registry server"},
{"logs", "Fetch the logs of a container"},
{"port", "Lookup the public-facing port that is NAT-ed to PRIVATE_PORT"},
{"pause", "Pause all processes within a container"},
{"ps", "List containers"},
{"pull", "Pull an image or a repository from a Docker registry server"},
{"push", "Push an image or a repository to a Docker registry server"},
{"rename", "Rename an existing container"},
{"restart", "Restart a running container"},
{"rm", "Remove one or more containers"},
{"rmi", "Remove one or more images"},
{"run", "Run a command in a new container"},
{"save", "Save an image to a tar archive"},
{"search", "Search for an image on the Docker Hub"},
{"start", "Start a stopped container"},
{"stats", "Display a stream of a containers' resource usage statistics"},
{"stop", "Stop a running container"},
{"tag", "Tag an image into a repository"},
{"top", "Lookup the running processes of a container"},
{"unpause", "Unpause a paused container"},
{"version", "Show the Docker version information"},
{"wait", "Block until a container stops, then print its exit code"},
func init() {
if dockerCertPath == "" {
dockerCertPath = filepath.Join(homedir.Get(), ".docker")
func getDaemonConfDir() string {
// TODO: update for Windows daemon
if runtime.GOOS == "windows" {
return filepath.Join(homedir.Get(), ".docker")
return "/etc/docker"
var (
flVersion = flag.Bool([]string{"v", "-version"}, false, "Print version information and quit")
flDaemon = flag.Bool([]string{"d", "-daemon"}, false, "Enable daemon mode")
flDebug = flag.Bool([]string{"D", "-debug"}, false, "Enable debug mode")
flLogLevel = flag.String([]string{"l", "-log-level"}, "info", "Set the logging level")
flTls = flag.Bool([]string{"-tls"}, false, "Use TLS; implied by --tlsverify")
flHelp = flag.Bool([]string{"h", "-help"}, false, "Print usage")
flTlsVerify = flag.Bool([]string{"-tlsverify"}, dockerTlsVerify, "Use TLS and verify the remote")
// these are initialized in init() below since their default values depend on dockerCertPath which isn't fully initialized until init() runs
flTrustKey *string
flCa *string
flCert *string
flKey *string
flHosts []string
func setDefaultConfFlag(flag *string, def string) {
if *flag == "" {
if *flDaemon {
*flag = filepath.Join(getDaemonConfDir(), def)
} else {
*flag = filepath.Join(homedir.Get(), ".docker", def)
func init() {
var placeholderTrustKey string
// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
flTrustKey = &placeholderTrustKey
flCa = flag.String([]string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust certs signed only by this CA")
flCert = flag.String([]string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
flKey = flag.String([]string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
opts.HostListVar(&flHosts, []string{"H", "-host"}, "Daemon socket(s) to connect to")
flag.Usage = func() {
fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for linux containers.\n\nOptions:\n")
help := "\nCommands:\n"
for _, cmd := range dockerCommands {
help += fmt.Sprintf(" %-10.10s%s\n",, cmd.description)
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(os.Stdout, "%s\n", help)