midx: fix `*.rev` cleanups with `--object-dir`
If using --object-dir to point into an object directory which belongs to
a different repository than the one in the current working directory,
such as:
git init repo
git -C repo ... # add some objects
cd alternate
git multi-pack-index --object-dir ../repo/.git/objects write
the binary will segfault trying to access the object-dir via the repo it
found, but that's not fully initialized. Worse, if we later call
clear_midx_files_ext(), we will use `the_repository` and remove files
out of the wrong object directory.
Fix this by using the given object_dir (or the object directory of
`the_repository` if `--object-dir` wasn't given) to properly to clean up
the *.rev files, avoiding the crash.
Original-patch-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/midx.c b/midx.c
index 321c6fd..902e1a7 100644
--- a/midx.c
+++ b/midx.c
@@ -882,7 +882,7 @@ static void write_midx_reverse_index(char *midx_name, unsigned char *midx_hash,
strbuf_release(&buf);
}
-static void clear_midx_files_ext(struct repository *r, const char *ext,
+static void clear_midx_files_ext(const char *object_dir, const char *ext,
unsigned char *keep_hash);
static int midx_checksum_valid(struct multi_pack_index *m)
@@ -1086,7 +1086,7 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
if (flags & MIDX_WRITE_REV_INDEX)
write_midx_reverse_index(midx_name, midx_hash, &ctx);
- clear_midx_files_ext(the_repository, ".rev", midx_hash);
+ clear_midx_files_ext(object_dir, ".rev", midx_hash);
commit_lock_file(&lk);
@@ -1135,7 +1135,7 @@ static void clear_midx_file_ext(const char *full_path, size_t full_path_len,
die_errno(_("failed to remove %s"), full_path);
}
-static void clear_midx_files_ext(struct repository *r, const char *ext,
+static void clear_midx_files_ext(const char *object_dir, const char *ext,
unsigned char *keep_hash)
{
struct clear_midx_data data;
@@ -1146,7 +1146,7 @@ static void clear_midx_files_ext(struct repository *r, const char *ext,
hash_to_hex(keep_hash), ext);
data.ext = ext;
- for_each_file_in_pack_dir(r->objects->odb->path,
+ for_each_file_in_pack_dir(object_dir,
clear_midx_file_ext,
&data);
@@ -1165,7 +1165,7 @@ void clear_midx_file(struct repository *r)
if (remove_path(midx))
die(_("failed to clear multi-pack-index at %s"), midx);
- clear_midx_files_ext(r, ".rev", NULL);
+ clear_midx_files_ext(r->objects->odb->path, ".rev", NULL);
free(midx);
}
