@matheusbsbs / matheus-bagliano / commits / 5ceb663e92

dir: fix directory-matching bug

This reverts the change from ed49584 (dir: fix pattern matching on dirs, 2021-09-24), which claimed to fix a directory-matching problem without a test case. It turns out to _create_ a bug, but it is a bit subtle. The bug would have been revealed by the first of two tests being added to t0008-ignores.sh. The first uses a pattern "/git/" inside the a/.gitignores file, which matches against 'a/git/foo' but not 'a/git-foo/bar'. This test would fail before the revert. The second test shows what happens if the test instead uses a pattern "git/" and this test passes both before and after the revert. The difference in these two cases are due to how last_matching_pattern_from_list() checks patterns both if they have the PATTERN_FLAG_MUSTBEDIR and PATTERN_FLAG_NODIR flags. In the case of "git/", the PATTERN_FLAG_NODIR is also provided, making the change in behavior in match_pathname() not affect the end result of last_matching_pattern_from_list(). Reported-by: Glen Choo <chooglen@google.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Derrick Stolee committed Nov 2, 2021 at 10:40 UTC 5ceb663e926bd22248d1d72d70fa701c558587ea
2 files changed +27 -1
dir.c
+1 -1
index 174d336c30..9ea6cfe61c 100644 --- a/dir.c +++ b/dir.c @@ -1294,7 +1294,7 @@ int match_pathname(const char *pathname, int pathlen, * then our prefix match is all we need; we * do not need to call fnmatch at all. */ - if (!patternlen && (!namelen || (flags & PATTERN_FLAG_MUSTBEDIR))) + if (!patternlen && !namelen) return 1; }
t/t0008-ignores.sh
+26
index a594b4aa7d..46a5038fed 100755 --- a/t/t0008-ignores.sh +++ b/t/t0008-ignores.sh @@ -802,6 +802,32 @@ test_expect_success 'existing directory and file' ' grep top-level-dir actual ' +test_expect_success 'exact prefix matching (with root)' ' + test_when_finished rm -r a && + mkdir -p a/git a/git-foo && + touch a/git/foo a/git-foo/bar && + echo /git/ >a/.gitignore && + git check-ignore a/git a/git/foo a/git-foo a/git-foo/bar >actual && + cat >expect <<-\EOF && + a/git + a/git/foo + EOF + test_cmp expect actual +' + +test_expect_success 'exact prefix matching (without root)' ' + test_when_finished rm -r a && + mkdir -p a/git a/git-foo && + touch a/git/foo a/git-foo/bar && + echo git/ >a/.gitignore && + git check-ignore a/git a/git/foo a/git-foo a/git-foo/bar >actual && + cat >expect <<-\EOF && + a/git + a/git/foo + EOF + test_cmp expect actual +' + ############################################################################ # # test whitespace handling