Function grep_cache

builtin/grep.c:548–626

}

static int grep_cache(struct grep_opt *opt,
		      const struct pathspec *pathspec, int cached)
{
	struct repository *repo = opt->repo;
	int hit = 0;
	int nr;
	struct strbuf name = STRBUF_INIT;
	int name_base_len = 0;
	if (repo->submodule_prefix) {
		name_base_len = strlen(repo->submodule_prefix);
		strbuf_addstr(&name, repo->submodule_prefix);
	}

	if (repo_read_index(repo) < 0)
		die(_("index file corrupt"));

	for (nr = 0; nr < repo->index->cache_nr; nr++) {
		const struct cache_entry *ce = repo->index->cache[nr];

		if (!cached && ce_skip_worktree(ce))
			continue;

		strbuf_setlen(&name, name_base_len);
		strbuf_addstr(&name, ce->name);
		if (S_ISSPARSEDIR(ce->ce_mode)) {
			enum object_type type;
			struct tree_desc tree;
			void *data;
			size_t size;

			data = odb_read_object(the_repository->objects, &ce->oid,
					       &type, &size);
			if (!data)
				die(_("unable to read tree %s"), oid_to_hex(&ce->oid));
			init_tree_desc(&tree, &ce->oid, data, size);

			hit |= grep_tree(opt, pathspec, &tree, &name, 0, 0);
			strbuf_setlen(&name, name_base_len);
			strbuf_addstr(&name, ce->name);
			free(data);
		} else if (S_ISREG(ce->ce_mode) &&
		    match_pathspec(repo->index, pathspec, name.buf, name.len, 0, NULL,
				   S_ISDIR(ce->ce_mode) ||
				   S_ISGITLINK(ce->ce_mode))) {
			/*
			 * If CE_VALID is on, we assume worktree file and its
			 * cache entry are identical, even if worktree file has
			 * been modified, so use cache version instead
			 */
			if (cached || (ce->ce_flags & CE_VALID)) {
				if (ce_stage(ce) || ce_intent_to_add(ce))
					continue;
				hit |= grep_oid(opt, &ce->oid, name.buf,
						 0, name.buf);
			} else {
				hit |= grep_file(opt, name.buf);
			}
		} else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&