func preExecHook(c *Command) {
if mousetrap.StartedByExplorer() {
c.Print(MousetrapHelpText)
time.Sleep(5 * time.Second)
os.Exit(1)
}
}
// Call execute to use the args (os.Args[1:] by default)
// and run through the command tree finding appropriate matches
// for commands and then corresponding flags.
func (c *Command) Execute() (err error) {
// Regardless of what command execute is called on, run on Root only
if c.HasParent() {
return c.Root().Execute()
}
if EnableWindowsMouseTrap && runtime.GOOS == "windows" {
if mousetrap.StartedByExplorer() {
c.Print(MousetrapHelpText)
time.Sleep(5 * time.Second)
os.Exit(1)
}
}
// initialize help as the last point possible to allow for user
// overriding
c.initHelpCmd()
var args []string
if len(c.args) == 0 {
args = os.Args[1:]
} else {
args = c.args
}
cmd, flags, err := c.Find(args)
if err != nil {
// If found parse to a subcommand and then failed, talk about the subcommand
if cmd != nil {
c = cmd
}
c.Println("Error:", err.Error())
c.Printf("Run '%v --help' for usage.\n", c.CommandPath())
return err
}
err = cmd.execute(flags)
if err != nil {
if err == flag.ErrHelp {
cmd.HelpFunc()(cmd, args)
return nil
}
c.Println(cmd.UsageString())
c.Println("Error:", err.Error())
}
return
}