Jacob Helwig <jacob.helwig@xxxxxxxxx> writes:
> I was able to reproduce this one one of the machines I have access to,
> and bisecting shows that it was introduced by b6986d8 (git-checkout: be
> careful about untracked symlinks).
Ahh..
-- >8 --
check_path(): allow symlinked directories to checkout-index --prefix
Merlyn noticed that Documentation/install-doc-quick.sh no longer correctly
removes old installed documents when the target directory has a leading
path that is a symlink. It turns out that "checkout-index --prefix" was
broken by recent b6986d8 (git-checkout: be careful about untracked
symlinks, 2009-07-29).
I suspect has_symlink_leading_path() could learn the third parameter
(prefix that is allowed to be symlinked directories) to allow us to retire
a similar function has_dirs_only_path().
Another avenue of fixing this I considered was to get rid of base_dir and
base_dir_len from "struct checkout", and instead make "git checkout-index"
when run with --prefix mkdir the leading path and chdir in there. It
might be the best longer term solution to this issue, as the base_dir
feature is used only by that rather obscure codepath as far as I know.
But at least this patch should fix this breakage.
SIgned-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
cache.h | 3 ---
entry.c | 15 ++++++++++++---
t/t2000-checkout-cache-clash.sh | 9 +++++++++
3 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/cache.h b/cache.h
index 9222774..e6c7f33 100644
--- a/cache.h
+++ b/cache.h
@@ -468,9 +468,6 @@ extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_obje
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
-/* "careful lstat()" */
-extern int check_path(const char *path, int len, struct stat *st);
-
#define REFRESH_REALLY 0x0001 /* ignore_valid */
#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
#define REFRESH_QUIET 0x0004 /* be quiet about it */
diff --git a/entry.c b/entry.c
index f276cf3..6813f8a 100644
--- a/entry.c
+++ b/entry.c
@@ -179,9 +179,18 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout
* This is like 'lstat()', except it refuses to follow symlinks
* in the path.
*/
-int check_path(const char *path, int len, struct stat *st)
+static int check_path(const char *path, int len, struct stat *st,
+ const struct checkout *co)
{
- if (has_symlink_leading_path(path, len)) {
+ if (co->base_dir_len) {
+ const char *slash = path + len;
+ while (path < slash && *slash != '/')
+ slash--;
+ if (!has_dirs_only_path(path, slash-path, co->base_dir_len)) {
+ errno = ENOENT;
+ return -1;
+ }
+ } else if (has_symlink_leading_path(path, len)) {
errno = ENOENT;
return -1;
}
@@ -201,7 +210,7 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t
strcpy(path + len, ce->name);
len += ce_namelen(ce);
- if (!check_path(path, len, &st)) {
+ if (!check_path(path, len, &st, state)) {
unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID);
if (!changed)
return 0;
diff --git a/t/t2000-checkout-cache-clash.sh b/t/t2000-checkout-cache-clash.sh
index f7e1a73..3edade0 100755
--- a/t/t2000-checkout-cache-clash.sh
+++ b/t/t2000-checkout-cache-clash.sh
@@ -48,4 +48,13 @@ test_expect_success \
'git checkout-index conflicting paths.' \
'test -f path0 && test -d path1 && test -f path1/file1'
+test_expect_success 'checkout-index -f twice with --prefix' '
+ mkdir -p tar/get &&
+ ln -s tar/get there &&
+ echo first &&
+ git checkout-index -a -f --prefix=there/ &&
+ echo second &&
+ git checkout-index -a -f --prefix=there/
+'
+
test_done
--
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