108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
package main
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import (
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"fmt"
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"os"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/cli/command/commands"
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cliflags "github.com/docker/docker/cli/flags"
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"github.com/docker/docker/cliconfig"
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"github.com/docker/docker/dockerversion"
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"github.com/docker/docker/pkg/term"
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"github.com/docker/docker/utils"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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func newDockerCommand(dockerCli *command.DockerCli) *cobra.Command {
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opts := cliflags.NewClientOptions()
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var flags *pflag.FlagSet
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cmd := &cobra.Command{
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Use: "docker [OPTIONS] COMMAND [arg...]",
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Short: "A self-sufficient runtime for containers.",
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SilenceUsage: true,
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SilenceErrors: true,
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TraverseChildren: true,
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Args: noArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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if opts.Version {
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showVersion()
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return nil
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}
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fmt.Fprintf(dockerCli.Err(), "\n"+cmd.UsageString())
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return nil
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},
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PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
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// flags must be the top-level command flags, not cmd.Flags()
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opts.Common.SetDefaultOptions(flags)
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dockerPreRun(opts)
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return dockerCli.Initialize(opts)
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},
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}
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cli.SetupRootCommand(cmd)
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flags = cmd.Flags()
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flags.BoolVarP(&opts.Version, "version", "v", false, "Print version information and quit")
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flags.StringVar(&opts.ConfigDir, "config", cliconfig.ConfigDir(), "Location of client config files")
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opts.Common.InstallFlags(flags)
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cmd.SetOutput(dockerCli.Out())
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cmd.AddCommand(newDaemonCommand())
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commands.AddCommands(cmd, dockerCli)
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return cmd
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}
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func noArgs(cmd *cobra.Command, args []string) error {
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if len(args) == 0 {
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return nil
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}
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return fmt.Errorf(
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"docker: '%s' is not a docker command.\nSee 'docker --help'%s", args[0], ".")
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}
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func main() {
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// Set terminal emulation based on platform as required.
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stdin, stdout, stderr := term.StdStreams()
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logrus.SetOutput(stderr)
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dockerCli := command.NewDockerCli(stdin, stdout, stderr)
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cmd := newDockerCommand(dockerCli)
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if err := cmd.Execute(); err != nil {
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if sterr, ok := err.(cli.StatusError); ok {
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if sterr.Status != "" {
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fmt.Fprintln(stderr, sterr.Status)
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}
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// StatusError should only be used for errors, and all errors should
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// have a non-zero exit status, so never exit with 0
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if sterr.StatusCode == 0 {
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os.Exit(1)
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}
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os.Exit(sterr.StatusCode)
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}
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fmt.Fprintln(stderr, err)
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os.Exit(1)
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}
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}
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func showVersion() {
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fmt.Printf("Docker version %s, build %s\n", dockerversion.Version, dockerversion.GitCommit)
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}
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func dockerPreRun(opts *cliflags.ClientOptions) {
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cliflags.SetLogLevel(opts.Common.LogLevel)
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if opts.ConfigDir != "" {
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cliconfig.SetConfigDir(opts.ConfigDir)
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}
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if opts.Common.Debug {
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utils.EnableDebug()
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}
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}
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