parse-options: disallow negating OPTION_SET_INT 0

An option of type OPTION_SET_INT can be defined to set its variable to
zero.  It's negated variant will do the same, though, which is
confusing.  Several such options were fixed by disabling negation,
changing the value to set or using a different option type:

991c552 (ls-tree: fix --no-full-name, 2023-07-18)
e12cb98 (branch: reject "--no-all" and "--no-remotes" early, 2023-07-18)
68cbb20 (show-branch: reject --[no-](topo|date)-order, 2023-07-19)
3821eb6 (reset: reject --no-(mixed|soft|hard|merge|keep) option, 2023-07-19)
36f76d2 (pack-objects: fix --no-quiet, 2023-07-21)
3a5f308 (pack-objects: fix --no-keep-true-parents, 2023-07-21)
c95ae3f (describe: fix --no-exact-match, 2023-07-21)
d089a06 (bundle: use OPT_PASSTHRU_ARGV, 2023-07-29)

Check for such options that allow negation in parse_options_check() and
report them to find future cases quicker.

Signed-off-by: René Scharfe <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: rscharfe

parse-options.c

@@ -480,6 +480,9 @@ static void parse_options_check(const struct option *opts)
 		     opts->long_name))
 			optbug(opts, "uses feature "
 			       "not supported for dashless options");
+		if (opts->type == OPTION_SET_INT && !opts->defval &&
+		    opts->long_name && !(opts->flags & PARSE_OPT_NONEG))
+			optbug(opts, "OPTION_SET_INT 0 should not be negatable");
 		switch (opts->type) {
 		case OPTION_COUNTUP:
 		case OPTION_BIT: