Before 82dce99 (attr: more matching optimizations from .gitignore,
2012-10-15), .gitattributes did not have any special treatment of a
leading '!'. The docs, however, always said
The rules how the pattern matches paths are the same as in
`.gitignore` files; see linkgit:gitignore[5].
By those rules, leading '!' means pattern negation. So 82dce99
correctly determined that this kind of line makes no sense and should
be disallowed.
However, users who actually had a rule for files starting with a '!'
are in a bad position: before 82dce99 '!' matched that literal
character, so it is conceivable that users have .gitattributes with
such lines in them. After 82dce99 the unescaped version was
disallowed in such a way that git outright refuses to run(!) most
commands in the presence of such a .gitattributes. It therefore
becomes very hard to fix, let alone work with, such repositories.
Let's at least allow the users to fix their repos: change the fatal
error into a warning.
Reported-by: mathstuf@xxxxxxxxx
Signed-off-by: Thomas Rast <trast@xxxxxxxxxxxxxxx>
---
attr.c | 8 +++++---
t/t0003-attributes.sh | 3 ++-
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/attr.c b/attr.c
index 4657cc2..e2f9377 100644
--- a/attr.c
+++ b/attr.c
@@ -255,9 +255,11 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
&res->u.pat.patternlen,
&res->u.pat.flags,
&res->u.pat.nowildcardlen);
- if (res->u.pat.flags & EXC_FLAG_NEGATIVE)
- die(_("Negative patterns are forbidden in git attributes\n"
- "Use '\\!' for literal leading exclamation."));
+ if (res->u.pat.flags & EXC_FLAG_NEGATIVE) {
+ warning(_("Negative patterns are ignored in git attributes\n"
+ "Use '\\!' for literal leading exclamation."));
+ return NULL;
+ }
}
res->is_macro = is_macro;
res->num_attr = num_attr;
diff --git a/t/t0003-attributes.sh b/t/t0003-attributes.sh
index 43b2513..0b98b6f 100755
--- a/t/t0003-attributes.sh
+++ b/t/t0003-attributes.sh
@@ -198,7 +198,8 @@ test_expect_success 'root subdir attribute test' '
test_expect_success 'negative patterns' '
echo "!f test=bar" >.gitattributes &&
- test_must_fail git check-attr test -- f
+ git check-attr test -- '"'"'!f'"'"' 2>errors &&
+ test_i18ngrep "Negative patterns are ignored" errors
'
test_expect_success 'patterns starting with exclamation' '
--
1.8.2.rc1.392.gf57d6b8.dirty
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