Re: [PATCH v13 01/13] bisect--helper: use OPT_CMDMODE instead of OPT_BOOL

> `--next-all` is meant to be used as a subcommand to support multiple
> "operation mode" though the current implementation does not contain any
> other subcommand along side with `--next-all` but further commits will
> include some more subcommands.
>
> Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
> Mentored-by: Lars Schneider <larsxschneider@gmail.com>
> Mentored-by: Christian Couder <chriscool@tuxfamily.org>
> Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
> ---
>  builtin/bisect--helper.c | 17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
> index 3324229..8111c91 100644
> --- a/builtin/bisect--helper.c
> +++ b/builtin/bisect--helper.c
> @@ -10,11 +10,11 @@ static const char * const git_bisect_helper_usage[] = {
>
>  int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>  {
> -       int next_all = 0;
> +       enum { NEXT_ALL = 1 } cmdmode = 0;
>         int no_checkout = 0;
>         struct option options[] = {
> -               OPT_BOOL(0, "next-all", &next_all,
> -                        N_("perform 'git bisect next'")),
> +               OPT_CMDMODE(0, "next-all", &cmdmode,
> +                        N_("perform 'git bisect next'"), NEXT_ALL),
>                 OPT_BOOL(0, "no-checkout", &no_checkout,
>                          N_("update BISECT_HEAD instead of checking out the current commit")),
>                 OPT_END()
> @@ -23,9 +23,14 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>         argc = parse_options(argc, argv, prefix, options,
>                              git_bisect_helper_usage, 0);
>
> -       if (!next_all)
> +       if (!cmdmode)
>                 usage_with_options(git_bisect_helper_usage, options);
>
> -       /* next-all */
> -       return bisect_next_all(prefix, no_checkout);
> +       switch (cmdmode) {
> +       case NEXT_ALL:
> +               return bisect_next_all(prefix, no_checkout);
> +       default:
> +               die("BUG: unknown subcommand '%d'", cmdmode);
> +       }
> +       return 0;
>  }