Function write_locked_index

read-cache.c:3309–3392

}

int write_locked_index(struct index_state *istate, struct lock_file *lock,
		       unsigned flags)
{
	int new_shared_index, ret, test_split_index_env;
	struct split_index *si = istate->split_index;

	if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0) &&
	    cache_tree_verify(the_repository, istate) < 0)
		return -1;

	if ((flags & SKIP_IF_UNCHANGED) && !istate->cache_changed) {
		if (flags & COMMIT_LOCK)
			rollback_lock_file(lock);
		return 0;
	}

	if (istate->fsmonitor_last_update)
		fill_fsmonitor_bitmap(istate);

	test_split_index_env = git_env_bool("GIT_TEST_SPLIT_INDEX", 0);

	if ((!si && !test_split_index_env) ||
	    alternate_index_output ||
	    (istate->cache_changed & ~EXTMASK)) {
		ret = do_write_locked_index(istate, lock, flags,
					    ~WRITE_SPLIT_INDEX_EXTENSION);
		goto out;
	}

	if (test_split_index_env) {
		if (!si) {
			si = init_split_index(istate);
			istate->cache_changed |= SPLIT_INDEX_ORDERED;
		} else {
			int v = si->base_oid.hash[0];
			if ((v & 15) < 6)
				istate->cache_changed |= SPLIT_INDEX_ORDERED;
		}
	}
	if (too_many_not_shared_entries(istate))
		istate->cache_changed |= SPLIT_INDEX_ORDERED;

	new_shared_index = istate->cache_changed & SPLIT_INDEX_ORDERED;

	if (new_shared_index) {
		struct tempfile *temp;
		int saved_errno;
		char *path;

		/* Same initial permissions as the main .git/index file */
		path = repo_git_path(the_repository, "sharedindex_XXXXXX");
		temp = mks_tempfile_sm(path, 0, 0666);
		free(path);
		if (!temp) {
			ret = do_write_locked_index(istate, lock, flags,
						    ~WRITE_SPLIT_INDEX_EXTENSION);
			goto out;
		}