The string in 'base' contains a path suffix to a specific object; when
its value is used, the suffix must either be filled (as in
stat_sha1_file, open_sha1_file, check_and_freshen_nonlocal) or cleared
(as in prepare_packed_git) to avoid junk at the end. loose_from_alt_odb
(introduced in 660c889e46d185dc98ba78963528826728b0a55d) did neither and
treated 'base' as a complete path to the "base" object directory,
instead of a pointer to the "base" of the full path string.
The trailing path after 'base' is still initialized to NUL, hiding the
bug in some common cases. Additionally the descendent
for_each_file_in_obj_subdir function swallows ENOENT, so an error only
shows if the alternate's path was last filled with a valid object
(where statting /path/to/existing/00/0bjectfile/00 fails).
Signed-off-by: Jonathon Mah <me@xxxxxxxxxxxxxxx>
---
Simplified test per Junio (verified that it fails before and passes now). Punting on Jeff's "more elaborate example".
sha1_file.c | 10 +++++++---
t/t5304-prune.sh | 8 ++++++++
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/sha1_file.c b/sha1_file.c
index 30995e6..fcb1c4b 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -3396,9 +3396,13 @@ static int loose_from_alt_odb(struct alternate_object_database *alt,
void *vdata)
{
struct loose_alt_odb_data *data = vdata;
- return for_each_loose_file_in_objdir(alt->base,
- data->cb, NULL, NULL,
- data->data);
+ int r;
+ alt->name[-1] = 0;
+ r = for_each_loose_file_in_objdir(alt->base,
+ data->cb, NULL, NULL,
+ data->data);
+ alt->name[-1] = '/';
+ return r;
}
int for_each_loose_object(each_loose_object_fn cb, void *data)
diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
index e32e46d..0794d33 100755
--- a/t/t5304-prune.sh
+++ b/t/t5304-prune.sh
@@ -253,4 +253,12 @@ test_expect_success 'prune .git/shallow' '
test_path_is_missing .git/shallow
'
+test_expect_success 'prune: handle alternate object database' '
+ test_create_repo A &&
+ git -C A commit --allow-empty -m "initial commit" &&
+ git clone --shared A B &&
+ git -C B commit --allow-empty -m "next commit" &&
+ git -C B prune
+'
+
test_done
--
2.3.0.rc2.2.g184f7a0
--
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