// CmdHelp displays information on a Get3W command.
//
// If more than one command is specified, information is only shown for the first command.
//
// Usage: get3w help COMMAND or get3w COMMAND --help
func (cli *Cli) CmdHelp(args ...string) error {
if len(args) > 1 {
command, err := cli.command(args[:2]...)
switch err := err.(type) {
case nil:
command("--help")
return nil
case initErr:
return err.error
}
}
if len(args) > 0 {
command, err := cli.command(args[0])
switch err := err.(type) {
case nil:
command("--help")
return nil
case initErr:
return err.error
}
cli.noSuchCommand(args[0])
}
if cli.Usage == nil {
flag.Usage()
} else {
cli.Usage()
}
return nil
}
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(os.Stdout, "Usage: get3w [OPTIONS] COMMAND [arg...]\n www [ --help | -v | --version ]\n\n")
fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")
flag.CommandLine.SetOutput(os.Stdout)
flag.PrintDefaults()
help := "\nCommands:\n"
for _, cmd := range get3wCommands {
help += fmt.Sprintf(" %-10.10s%s\n", cmd.Name, cmd.Description)
}
help += "\nRun 'get3w COMMAND --help' for more information on a command."
fmt.Fprintf(os.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
}
if *flServer {
server.Run()
return
}
// TODO: remove once `-d` is retired
clientCli := client.NewGet3WCli(stdin, stdout, stderr, clientFlags)
c := cli.New(clientCli)
if err := c.Run(flag.Args()...); err != nil {
if sterr, ok := err.(cli.StatusError); ok {
if sterr.Status != "" {
fmt.Fprintln(os.Stderr, sterr.Status)
os.Exit(1)
}
os.Exit(sterr.StatusCode)
}
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}