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maintenance: add parse-options boilerplate for subcommands 

Several of the git-maintenance subcommands don't take any options, so
they don't bother looking at argv at all. This means they'll silently
accept garbage, like:

  $ git maintenance register --foo
  [no output]

  $ git maintenance stop bar
  [no output]

Let's give them the basic boilerplate to detect and handle these cases:

  $ git maintenance register --foo
  error: unknown option `foo'
  usage: git maintenance register

  $ git maintenance stop bar
  usage: git maintenance stop

We could reduce the number of lines of code here a bit with a shared
helper function. But it's worth building out the boilerplate, as it may
serve as the base for adding options later.

Note one complication: maintenance_start() calls directly into
maintenance_register(), so it now needs to pass a plausible argv (we
don't care, but parse_options() is expecting there to at least be an
argv[0] program name). This is an extra line of code, but it eliminates
the need for an explanatory comment.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2022-08-25 06:51:06 -04:00 committed by Junio C Hamano
parent ecd2d3efe0
commit 0d330a53f3
1 changed files with 42 additions and 1 deletions
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43
builtin/gc.c
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@ -1465,14 +1465,28 @@ static char *get_maintpath(void)
return strbuf_detach(&sb, NULL);
}
static char const * const builtin_maintenance_register_usage[] = {
N_("git maintenance register"),
NULL
};
static int maintenance_register(int argc, const char **argv, const char *prefix)
{
struct option options[] = {
OPT_END(),
};
int rc;
char *config_value;
struct child_process config_set = CHILD_PROCESS_INIT;
struct child_process config_get = CHILD_PROCESS_INIT;
char *maintpath = get_maintpath();
argc = parse_options(argc, argv, prefix, options,
builtin_maintenance_register_usage, 0);
if (argc)
usage_with_options(builtin_maintenance_register_usage,
options);
/* Disable foreground maintenance */
git_config_set("maintenance.auto", "false");
@ -1509,12 +1523,26 @@ static int maintenance_register(int argc, const char **argv, const char *prefix)
return rc;
}
static char const * const builtin_maintenance_unregister_usage[] = {
N_("git maintenance unregister"),
NULL
};
static int maintenance_unregister(int argc, const char **argv, const char *prefix)
{
struct option options[] = {
OPT_END(),
};
int rc;
struct child_process config_unset = CHILD_PROCESS_INIT;
char *maintpath = get_maintpath();
argc = parse_options(argc, argv, prefix, options,
builtin_maintenance_unregister_usage, 0);
if (argc)
usage_with_options(builtin_maintenance_unregister_usage,
options);
config_unset.git_cmd = 1;
strvec_pushl(&config_unset.args, "config", "--global", "--unset",
"--fixed-value", "maintenance.repo", maintpath, NULL);
@ -2496,6 +2524,7 @@ static int maintenance_start(int argc, const char **argv, const char *prefix)
PARSE_OPT_NONEG, maintenance_opt_scheduler),
OPT_END()
};
const char *register_args[] = { "register", NULL };
argc = parse_options(argc, argv, prefix, options,
builtin_maintenance_start_usage, 0);
@ -2505,13 +2534,25 @@ static int maintenance_start(int argc, const char **argv, const char *prefix)
opts.scheduler = resolve_scheduler(opts.scheduler);
validate_scheduler(opts.scheduler);
if (maintenance_register(0, NULL, NULL)) /* It doesn't take any args */
if (maintenance_register(ARRAY_SIZE(register_args)-1, register_args, NULL))
warning(_("failed to add repo to global config"));
return update_background_schedule(&opts, 1);
}
static const char *const builtin_maintenance_stop_usage[] = {
N_("git maintenance stop"),
NULL
};
static int maintenance_stop(int argc, const char **argv, const char *prefix)
{
struct option options[] = {
OPT_END()
};
argc = parse_options(argc, argv, prefix, options,
builtin_maintenance_stop_usage, 0);
if (argc)
usage_with_options(builtin_maintenance_stop_usage, options);
return update_background_schedule(NULL, 0);
}