Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> writes:
> Have the cmd_submodule__helper() use the OPT_SUBCOMMAND() API
> introduced in fa83cc834da (parse-options: add support for parsing
> subcommands, 2022-08-19).
>
> This is only a marginal reduction in line count, but once we start
> unifying this with a yet-to-be-added "builtin/submodule.c" it'll be
> much easier to reason about those changes, as they'll both use
> OPT_SUBCOMMAND().
Even if nothing else, this is a nice standardization change :)
> We don't need to worry about "argv[0]" being NULL in the die() because
> we'd have errored out in parse_options() as we're not using
> "PARSE_OPT_SUBCOMMAND_OPTIONAL".
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
> ---
> builtin/submodule--helper.c | 78 ++++++++++++++++++-------------------
> git.c | 2 +-
> 2 files changed, 39 insertions(+), 41 deletions(-)
>
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index 2012ad31d7f..0bc25dcf5ae 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -3350,47 +3350,45 @@ static int module_add(int argc, const char **argv, const char *prefix)
> return ret;
> }
>
> -#define SUPPORT_SUPER_PREFIX (1<<0)
> -
> -struct cmd_struct {
> - const char *cmd;
> - int (*fn)(int, const char **, const char *);
> - unsigned option;
> -};
> -
> -static struct cmd_struct commands[] = {
> - {"clone", module_clone, SUPPORT_SUPER_PREFIX},
> - {"add", module_add, 0},
> - {"update", module_update, SUPPORT_SUPER_PREFIX},
> - {"foreach", module_foreach, SUPPORT_SUPER_PREFIX},
> - {"init", module_init, 0},
> - {"status", module_status, SUPPORT_SUPER_PREFIX},
> - {"sync", module_sync, SUPPORT_SUPER_PREFIX},
> - {"deinit", module_deinit, 0},
> - {"summary", module_summary, 0},
> - {"push-check", push_check, 0},
> - {"absorbgitdirs", absorb_git_dirs, SUPPORT_SUPER_PREFIX},
> - {"set-url", module_set_url, 0},
> - {"set-branch", module_set_branch, 0},
> - {"create-branch", module_create_branch, 0},
> -};
> -
> int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
> {
> - int i;
> - if (argc < 2 || !strcmp(argv[1], "-h"))
> - usage("git submodule--helper <command>");
> -
> - for (i = 0; i < ARRAY_SIZE(commands); i++) {
> - if (!strcmp(argv[1], commands[i].cmd)) {
> - if (get_super_prefix() &&
> - !(commands[i].option & SUPPORT_SUPER_PREFIX))
> - die(_("%s doesn't support --super-prefix"),
> - commands[i].cmd);
> - return commands[i].fn(argc - 1, argv + 1, prefix);
> - }
> - }
> + const char *cmd = argv[0];
> + const char *subcmd;
> + parse_opt_subcommand_fn *fn = NULL;
> + const char *const usage[] = {
> + N_("git submodule--helper <command>"),
> + NULL
> + };
> + struct option options[] = {
> + OPT_SUBCOMMAND("clone", &fn, module_clone),
> + OPT_SUBCOMMAND("add", &fn, module_add),
> + OPT_SUBCOMMAND("update", &fn, module_update),
> + OPT_SUBCOMMAND("foreach", &fn, module_foreach),
> + OPT_SUBCOMMAND("init", &fn, module_init),
> + OPT_SUBCOMMAND("status", &fn, module_status),
> + OPT_SUBCOMMAND("sync", &fn, module_sync),
> + OPT_SUBCOMMAND("deinit", &fn, module_deinit),
> + OPT_SUBCOMMAND("summary", &fn, module_summary),
> + OPT_SUBCOMMAND("push-check", &fn, push_check),
> + OPT_SUBCOMMAND("absorbgitdirs", &fn, absorb_git_dirs),
> + OPT_SUBCOMMAND("set-url", &fn, module_set_url),
> + OPT_SUBCOMMAND("set-branch", &fn, module_set_branch),
> + OPT_SUBCOMMAND("create-branch", &fn, module_create_branch),
> + OPT_END()
> + };
> + argc = parse_options(argc, argv, prefix, options, usage, 0);
> + subcmd = argv[0];
> +
> + if (strcmp(subcmd, "clone") && strcmp(subcmd, "update") &&
> + strcmp(subcmd, "foreach") && strcmp(subcmd, "status") &&
> + strcmp(subcmd, "sync") && strcmp(subcmd, "absorbgitdirs") &&
> + get_super_prefix())
> + /*
> + * xstrfmt() rather than "%s %s" to keep the translated
> + * string identical to git.c's.
> + */
> + die(_("%s doesn't support --super-prefix"),
> + xstrfmt("'%s %s'", cmd, subcmd));
FYI I'm preparing a series to get rid of the SUPPORT_SUPER_PREFIX checks
in both the top level and in submodule--helper (i.e. revisiting my
complaints from [1]), but I haven't sent it out yet because I haven't
found the right way to motivate that change. Feel free to chime in on
that series when it comes out.
[1] https://lore.kernel.org/git/20220630221147.45689-5-chooglen@xxxxxxxxxx/
> - die(_("'%s' is not a valid submodule--helper "
> - "subcommand"), argv[1]);
> + return fn(argc, argv, prefix);
> }
> diff --git a/git.c b/git.c
> index ee7758dcb0e..fb69e605912 100644
> --- a/git.c
> +++ b/git.c
> @@ -610,7 +610,7 @@ static struct cmd_struct commands[] = {
> { "stash", cmd_stash, RUN_SETUP | NEED_WORK_TREE },
> { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
> { "stripspace", cmd_stripspace },
> - { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX | NO_PARSEOPT },
> + { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX },
> { "switch", cmd_switch, RUN_SETUP | NEED_WORK_TREE },
> { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
> { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
> --
> 2.38.0.1280.g8136eb6fab2
