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moby--moby/cmd/docker/docker.go

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package main
import (
"fmt"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/api/client"
"github.com/docker/docker/cli"
cliflags "github.com/docker/docker/cli/flags"
"github.com/docker/docker/cliconfig"
"github.com/docker/docker/dockerversion"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/term"
"github.com/docker/docker/utils"
)
var (
commonFlags = cliflags.InitCommonFlags()
clientFlags = initClientFlags(commonFlags)
flHelp = flag.Bool([]string{"h", "-help"}, false, "Print usage")
flVersion = flag.Bool([]string{"v", "-version"}, false, "Print version information and quit")
)
func main() {
// Set terminal emulation based on platform as required.
stdin, stdout, stderr := term.StdStreams()
logrus.SetOutput(stderr)
flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)
flag.Usage = func() {
fmt.Fprint(stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n docker [ --help | -v | --version ]\n\n")
fmt.Fprint(stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
dockerCommands := sortCommands(cli.DockerCommandUsage)
for _, cmd := range dockerCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.Name, cmd.Description)
}
help += "\nRun 'docker COMMAND --help' for more information on a command."
fmt.Fprintf(stdout, "%s\n", help)
}
flag.Parse()
if *flVersion {
showVersion()
return
}
if *flHelp {
// if global flag --help is present, regardless of what other options and commands there are,
// just print the usage.
flag.Usage()
return
}
clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
c := cli.New(clientCli, NewDaemonProxy())
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(stderr, sterr.Status)
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(stderr, err)
os.Exit(1)
}
}
func showVersion() {
if utils.ExperimentalBuild() {
fmt.Printf("Docker version %s, build %s, experimental\n", dockerversion.Version, dockerversion.GitCommit)
} else {
fmt.Printf("Docker version %s, build %s\n", dockerversion.Version, dockerversion.GitCommit)
}
}
func initClientFlags(commonFlags *cliflags.CommonFlags) *cliflags.ClientFlags {
clientFlags := &cliflags.ClientFlags{FlagSet: new(flag.FlagSet), Common: commonFlags}
client := clientFlags.FlagSet
client.StringVar(&clientFlags.ConfigDir, []string{"-config"}, cliconfig.ConfigDir(), "Location of client config files")
clientFlags.PostParse = func() {
clientFlags.Common.PostParse()
if clientFlags.ConfigDir != "" {
cliconfig.SetConfigDir(clientFlags.ConfigDir)
}
if clientFlags.Common.TrustKey == "" {
clientFlags.Common.TrustKey = filepath.Join(cliconfig.ConfigDir(), cliflags.DefaultTrustKeyFile)
}
if clientFlags.Common.Debug {
utils.EnableDebug()
}
}
return clientFlags
}