feat: make InitDefaultCompletionCmd public (#1467)

* feat: make InitDefaultCompletionCmd public

* PR comments

* Update man_docs_test.go

* Update README.md

Author: gssbzn

command.go

@@ -996,7 +996,7 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
 	// initialize help at the last point to allow for user overriding
 	c.InitDefaultHelpCmd()
 	// initialize completion at the last point to allow for user overriding
-	c.initDefaultCompletionCmd()
+	c.InitDefaultCompletionCmd()
 
 	args := c.args
 

completions.go

@@ -645,12 +645,12 @@ func checkIfFlagCompletion(finalCmd *Command, args []string, lastArg string) (*p
 	return flag, trimmedArgs, lastArg, nil
 }
 
-// initDefaultCompletionCmd adds a default 'completion' command to c.
+// InitDefaultCompletionCmd adds a default 'completion' command to c.
 // This function will do nothing if any of the following is true:
 // 1- the feature has been explicitly disabled by the program,
 // 2- c has no subcommands (to avoid creating one),
 // 3- c already has a 'completion' command provided by the program.
-func (c *Command) initDefaultCompletionCmd() {
+func (c *Command) InitDefaultCompletionCmd() {
 	if c.CompletionOptions.DisableDefaultCmd || !c.HasSubCommands() {
 		return
 	}

doc/README.md

@@ -7,6 +7,11 @@
 
 ## Options
 ### `DisableAutoGenTag`
+
 You may set `cmd.DisableAutoGenTag = true`
 to _entirely_ remove the auto generated string "Auto generated by spf13/cobra..."
 from any documentation source.
+
+### `InitDefaultCompletionCmd`
+
+You may call `cmd.InitDefaultCompletionCmd()` to document the default autocompletion command.