package main import ( "fmt" "os" "path/filepath" "runtime" "github.com/docker/docker/opts" flag "github.com/docker/docker/pkg/mflag" ) var ( dockerCertPath = os.Getenv("DOCKER_CERT_PATH") dockerTlsVerify = os.Getenv("DOCKER_TLS_VERIFY") != "" ) func init() { if dockerCertPath == "" { dockerCertPath = filepath.Join(getHomeDir(), ".docker") } } func getHomeDir() string { if runtime.GOOS == "windows" { return os.Getenv("USERPROFILE") } return os.Getenv("HOME") } 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") flSocketGroup = flag.String([]string{"G", "-group"}, "docker", "Group to assign the unix socket specified by -H when running in daemon mode\nuse '' (the empty string) to disable setting of a group") flLogLevel = flag.String([]string{"l", "-log-level"}, "info", "Set the logging level") flEnableCors = flag.Bool([]string{"#api-enable-cors", "-api-enable-cors"}, false, "Enable CORS headers in the remote API") flTls = flag.Bool([]string{"-tls"}, false, "Use TLS; implied by --tlsverify flag") flHelp = flag.Bool([]string{"h", "-help"}, false, "Print usage") flTlsVerify = flag.Bool([]string{"-tlsverify"}, dockerTlsVerify, "Use TLS and verify the remote (daemon: verify client, client: verify daemon)") // 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 init() { // placeholder for trust key flag trustKeyDefault := filepath.Join(dockerCertPath, defaultTrustKeyFile) flTrustKey = &trustKeyDefault flCa = flag.String([]string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust only remotes providing a certificate signed by the CA given here") 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"}, "The socket(s) to bind to in daemon mode or connect to in client mode, specified using one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd.") flag.Usage = func() { fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for linux containers.\n\nOptions:\n") flag.CommandLine.SetOutput(os.Stdout) flag.PrintDefaults() help := "\nCommands:\n" for _, command := range [][]string{ {"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"}, {"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"}, {"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"}, } { help += fmt.Sprintf(" %-10.10s%s\n", command[0], command[1]) } help += "\nRun 'docker COMMAND --help' for more information on a command." fmt.Fprintf(os.Stdout, "%s\n", help) } }