From a125a223347a8d43fffc1b7ec2bec93d88ec17b7 Mon Sep 17 00:00:00 2001 From: Thomas Gummerer Date: Sun, 7 Jan 2018 22:30:13 +0000 Subject: read-cache: fix reading the shared index for other repos read_index_from() takes a path argument for the location of the index file. For reading the shared index in split index mode however it just ignores that path argument, and reads it from the gitdir of the current repository. This works as long as an index in the_repository is read. Once that changes, such as when we read the index of a submodule, or of a different working tree than the current one, the gitdir of the_repository will no longer contain the appropriate shared index, and git will fail to read it. For example t3007-ls-files-recurse-submodules.sh was broken with GIT_TEST_SPLIT_INDEX set in 188dce131f ("ls-files: use repository object", 2017-06-22), and t7814-grep-recurse-submodules.sh was also broken in a similar manner, probably by introducing struct repository there, although I didn't track down the exact commit for that. be489d02d2 ("revision.c: --indexed-objects add objects from all worktrees", 2017-08-23) breaks with split index mode in a similar manner, not erroring out when it can't read the index, but instead carrying on with pruning, without taking the index of the worktree into account. Fix this by passing an additional gitdir parameter to read_index_from, to indicate where it should look for and read the shared index from. read_cache_from() defaults to using the gitdir of the_repository. As it is mostly a convenience macro, having to pass get_git_dir() for every call seems overkill, and if necessary users can have more control by using read_index_from(). Helped-by: Brandon Williams Signed-off-by: Thomas Gummerer Signed-off-by: Junio C Hamano --- cache-tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'cache-tree.c') diff --git a/cache-tree.c b/cache-tree.c index d3f7401278..e006215edc 100644 --- a/cache-tree.c +++ b/cache-tree.c @@ -608,7 +608,7 @@ int write_index_as_tree(unsigned char *sha1, struct index_state *index_state, co newfd = hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR); - entries = read_index_from(index_state, index_path); + entries = read_index_from(index_state, index_path, get_git_dir()); if (entries < 0) { ret = WRITE_TREE_UNREADABLE_INDEX; goto out; -- cgit v1.2.3