Method ParseFlags

command.go:1868–1889

ParseFlags parses persistent flag tree and local flags.

(args []string)

// ParseFlags parses persistent flag tree and local flags.
func (c *Command) ParseFlags(args []string) error {
	if c.DisableFlagParsing {
		return nil
	}

	if c.flagErrorBuf == nil {
		c.flagErrorBuf = new(bytes.Buffer)
	}
	beforeErrorBufLen := c.flagErrorBuf.Len()
	c.mergePersistentFlags()

	// do it here after merging all flags and just before parse
	c.Flags().ParseErrorsAllowlist = flag.ParseErrorsAllowlist(c.FParseErrWhitelist)

	err := c.Flags().Parse(args)
	// Print warnings if they occurred (e.g. deprecated flag messages).
	if c.flagErrorBuf.Len()-beforeErrorBufLen > 0 && err == nil {
		c.Print(c.flagErrorBuf.String())
	}

	return err
}

// Parent returns a commands parent command.
func (c *Command) Parent() *Command {