Function read_index_from

read-cache.c:2348–2413

}

int read_index_from(struct index_state *istate, const char *path,
		    const char *gitdir)
{
	struct split_index *split_index;
	int ret;
	char *base_oid_hex;
	char *base_path;

	/* istate->initialized covers both .git/index and .git/sharedindex.xxx */
	if (istate->initialized)
		return istate->cache_nr;

	trace2_region_enter_printf("index", "do_read_index", istate->repo,
				   "%s", path);
	trace_performance_enter();
	ret = do_read_index(istate, path, 0);
	trace_performance_leave("read cache %s", path);
	trace2_region_leave_printf("index", "do_read_index", istate->repo,
				   "%s", path);

	split_index = istate->split_index;
	if (!split_index || is_null_oid(&split_index->base_oid)) {
		post_read_index_from(istate);
		return ret;
	}

	trace_performance_enter();
	if (split_index->base)
		release_index(split_index->base);
	else
		ALLOC_ARRAY(split_index->base, 1);
	index_state_init(split_index->base, istate->repo);

	base_oid_hex = oid_to_hex(&split_index->base_oid);
	base_path = xstrfmt("%s/sharedindex.%s", gitdir, base_oid_hex);
	if (file_exists(base_path)) {
		trace2_region_enter_printf("index", "shared/do_read_index",
					the_repository, "%s", base_path);

		ret = do_read_index(split_index->base, base_path, 0);
		trace2_region_leave_printf("index", "shared/do_read_index",
					the_repository, "%s", base_path);
	} else {
		char *path_copy = xstrdup(path);
		char *base_path2 = xstrfmt("%s/sharedindex.%s",
					   dirname(path_copy), base_oid_hex);
		free(path_copy);
		trace2_region_enter_printf("index", "shared/do_read_index",
					   the_repository, "%s", base_path2);
		ret = do_read_index(split_index->base, base_path2, 1);
		trace2_region_leave_printf("index", "shared/do_read_index",
					   the_repository, "%s", base_path2);
		free(base_path2);
	}
	if (!oideq(&split_index->base_oid, &split_index->base->oid))
		die(_("broken index, expect %s in %s, got %s"),
		    base_oid_hex, base_path,
		    oid_to_hex(&split_index->base->oid));