Function printDefaultHelp

cmd/help.go:106–120

printDefaultHelp renders Cobra's built-in plain-text help by temporarily clearing the custom help function on the command and all its ancestors. Clearing only `cmd` is not enough: cobra's Help() walks up the parent chain to resolve a help func, which would re-enter wrapHelp on the still-wrapped root

(cmd *cobra.Command)

// to resolve a help func, which would re-enter wrapHelp on the still-wrapped
// root and recurse forever in non-TTY mode.
func printDefaultHelp(cmd *cobra.Command) {
	type saved struct {
		cmd *cobra.Command
		fn  func(*cobra.Command, []string)
	}
	var stack []saved
	for c := cmd; c != nil; c = c.Parent() {
		stack = append(stack, saved{c, c.HelpFunc()})
		c.SetHelpFunc(nil)
	}
	cmd.Help() //nolint:errcheck // stdout write failure is non-recoverable
	for _, s := range stack {
		s.cmd.SetHelpFunc(s.fn)
	}
}