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do not overwrite untracked symlinks

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Git traditionally overwrites untracked symlinks silently. This will
generally not cause massive data loss, but it is inconsistent with
the behavior for regular files, which are not silently overwritten.

With this change, git refuses to overwrite untracked symlinks by
default. If the user really wants to overwrite the untracked
symlink, he has git-clean and git-checkout -f at his disposal.

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Clemens Buchacher 2011-02-20 13:13:43 +01:00 committed by Junio C Hamano
parent 2fe26b775c
commit 1d718a5108
2 changed files with 12 additions and 4 deletions
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2
symlinks.c
View file

@ -223,7 +223,7 @@ int check_leading_path(const char *name, int len)
int flags;
int match_len = lstat_cache_matchlen(cache, name, len, &flags,
FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT);
if (flags & (FL_SYMLINK|FL_NOENT))
if (flags & FL_NOENT)
return 0;
else if (flags & FL_DIR)
return -1;

14
t/t6035-merge-dir-to-symlink.sh
View file

@ -17,13 +17,21 @@ test_expect_success SYMLINKS 'create a commit where dir a/b changed to symlink'
git commit -m "dir to symlink"
'
test_expect_success SYMLINKS 'keep a/b-2/c/d across checkout' '
test_expect_success SYMLINKS 'checkout does not clobber untracked symlink' '
git checkout HEAD^0 &&
git reset --hard master &&
git rm --cached a/b &&
git commit -m "untracked symlink remains" &&
git checkout start^0 &&
test -f a/b-2/c/d
test_must_fail git checkout start^0
'
test_expect_success SYMLINKS 'a/b-2/c/d is kept when clobbering symlink b' '
git checkout HEAD^0 &&
git reset --hard master &&
git rm --cached a/b &&
git commit -m "untracked symlink remains" &&
git checkout -f start^0 &&
test -f a/b-2/c/d
'
test_expect_success SYMLINKS 'checkout should not have deleted a/b-2/c/d' '