parse-options: make OPT_ARGUMENT() more useful
`OPT_ARGUMENT()` is intended to keep the specified long option in `argv`
and not to do anything else.
However, it would make a lot of sense for the caller to know whether
this option was seen at all or not. For example, we want to teach `git
difftool` to work outside of any Git worktree, but only when
`--no-index` was specified.
Note: nothing in Git uses OPT_ARGUMENT(). Even worse, looking through
the commit history, one can easily see that nothing even
ever used it, apart from the regression test.
So not only do we make `OPT_ARGUMENT()` more useful, we are also about
to introduce its first real user!
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/parse-options.h b/parse-options.h
index 7d83e29..c3d45ba 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -138,8 +138,8 @@ struct option {
{ OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), (cb) }
#define OPT_END() { OPTION_END }
-#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
- (h), PARSE_OPT_NOARG}
+#define OPT_ARGUMENT(l, v, h) { OPTION_ARGUMENT, 0, (l), (v), NULL, \
+ (h), PARSE_OPT_NOARG, NULL, 1 }
#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
#define OPT_BIT(s, l, v, h, b) OPT_BIT_F(s, l, v, h, b, 0)
#define OPT_BITOP(s, l, v, h, set, clear) { OPTION_BITOP, (s), (l), (v), NULL, (h), \
