github.com/fntlnz/docker@v1.9.0-rc3/docker/docker.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  
     7  	"github.com/Sirupsen/logrus"
     8  	"github.com/docker/docker/api/client"
     9  	"github.com/docker/docker/autogen/dockerversion"
    10  	"github.com/docker/docker/cli"
    11  	flag "github.com/docker/docker/pkg/mflag"
    12  	"github.com/docker/docker/pkg/reexec"
    13  	"github.com/docker/docker/pkg/term"
    14  	"github.com/docker/docker/utils"
    15  )
    16  
    17  func main() {
    18  	if reexec.Init() {
    19  		return
    20  	}
    21  
    22  	// Set terminal emulation based on platform as required.
    23  	stdin, stdout, stderr := term.StdStreams()
    24  
    25  	logrus.SetOutput(stderr)
    26  
    27  	flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)
    28  
    29  	flag.Usage = func() {
    30  		fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n"+daemonUsage+"       docker [ --help | -v | --version ]\n\n")
    31  		fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
    32  
    33  		flag.CommandLine.SetOutput(os.Stdout)
    34  		flag.PrintDefaults()
    35  
    36  		help := "\nCommands:\n"
    37  
    38  		for _, cmd := range dockerCommands {
    39  			help += fmt.Sprintf("    %-10.10s%s\n", cmd.Name, cmd.Description)
    40  		}
    41  
    42  		help += "\nRun 'docker COMMAND --help' for more information on a command."
    43  		fmt.Fprintf(os.Stdout, "%s\n", help)
    44  	}
    45  
    46  	flag.Parse()
    47  
    48  	if *flVersion {
    49  		showVersion()
    50  		return
    51  	}
    52  
    53  	if *flHelp {
    54  		// if global flag --help is present, regardless of what other options and commands there are,
    55  		// just print the usage.
    56  		flag.Usage()
    57  		return
    58  	}
    59  
    60  	// TODO: remove once `-d` is retired
    61  	handleGlobalDaemonFlag()
    62  	clientCli := client.NewDockerCli(stdin, stdout, stderr, clientFlags)
    63  
    64  	c := cli.New(clientCli, daemonCli)
    65  	if err := c.Run(flag.Args()...); err != nil {
    66  		if sterr, ok := err.(cli.StatusError); ok {
    67  			if sterr.Status != "" {
    68  				fmt.Fprintln(os.Stderr, sterr.Status)
    69  				os.Exit(1)
    70  			}
    71  			os.Exit(sterr.StatusCode)
    72  		}
    73  		fmt.Fprintln(os.Stderr, err)
    74  		os.Exit(1)
    75  	}
    76  }
    77  
    78  func showVersion() {
    79  	if utils.ExperimentalBuild() {
    80  		fmt.Printf("Docker version %s, build %s, experimental\n", dockerversion.VERSION, dockerversion.GITCOMMIT)
    81  	} else {
    82  		fmt.Printf("Docker version %s, build %s\n", dockerversion.VERSION, dockerversion.GITCOMMIT)
    83  	}
    84  }