Function runAsNewCommand

pkg/cmdmain/cmdmain.go:338–352

runAsNewCommand runs the executable specified by cmd's LookPath, which means cmd must implement the ExecRunner interface. The executable must be a binary of a program that runs Main.

(cmd CommandRunner, mode string)

// cmd must implement the ExecRunner interface. The executable must be a binary of
// a program that runs Main.
func runAsNewCommand(cmd CommandRunner, mode string) {
	execCmd, ok := cmd.(ExecRunner)
	if !ok {
		panic(fmt.Sprintf("%v does not implement ExecRunner", mode))
	}
	cmdPath, err := execCmd.LookPath()
	if err != nil {
		Errorf("Error: %v\n", err)
		Exit(2)
	}
	allArgs := shiftFlags(mode)
	if err := runExec(cmdPath, allArgs, newCopyEnv()); err != nil {
		panic(fmt.Sprintf("running %v should have ended with an os.Exit, and not leave us with that error: %v", cmdPath, err))
	}
}

// shiftFlags prepends all the arguments (global flags) passed before the given
// mode to the list of arguments after that mode, and returns that list.