parse-options: disable option abbreviation with PARSE_OPT_KEEP_UNKNOWN
parse-options can unambiguously find an abbreviation only if it sees
all available options. This is usually the case when you use
parse_options(). But there are other callers like blame or shortlog
which uses parse_options_start() in combination with a custom option
parser, like rev-list. parse-options cannot see all options in this
case and will get abbrev detection wrong. Disable it.
t7800 needs update because --symlink no longer expands to --symlinks
and will be passed down to git-diff, which will not recognize it. I
still think this is the correct thing to do. But if --symlink has been
actually used in the wild, we would just add an option alias for it.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/parse-options.c b/parse-options.c
index 740ae54..779034e 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -266,7 +266,8 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
}
if (!rest) {
/* abbreviated? */
- if (!strncmp(long_name, arg, arg_end - arg)) {
+ if (!(p->flags & PARSE_OPT_KEEP_UNKNOWN) &&
+ !strncmp(long_name, arg, arg_end - arg)) {
is_abbreviated:
if (abbrev_option) {
/*
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 22b9199..bb9a7f4 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -546,7 +546,7 @@
done >actual
EOF
-test_expect_success SYMLINKS 'difftool --dir-diff --symlink without unstaged changes' '
+test_expect_success SYMLINKS 'difftool --dir-diff --symlinks without unstaged changes' '
cat >expect <<-EOF &&
file
$PWD/file
@@ -555,7 +555,7 @@
sub/sub
$PWD/sub/sub
EOF
- git difftool --dir-diff --symlink \
+ git difftool --dir-diff --symlinks \
--extcmd "./.git/CHECK_SYMLINKS" branch HEAD &&
test_cmp expect actual
'
