Function path_matches_pattern_list

dir.c:1477–1550

* Scan the list of patterns to determine if the ordered list * of patterns matches on 'pathname'. * * Return 1 for a match, 0 for not matched and -1 for undecided. */

 * Return 1 for a match, 0 for not matched and -1 for undecided.
 */
enum pattern_match_result path_matches_pattern_list(
				const char *pathname, int pathlen,
				const char *basename, int *dtype,
				struct pattern_list *pl,
				struct index_state *istate)
{
	struct path_pattern *pattern;
	struct strbuf parent_pathname = STRBUF_INIT;
	int result = NOT_MATCHED;
	size_t slash_pos;

	if (!pl->use_cone_patterns) {
		pattern = last_matching_pattern_from_list(pathname, pathlen, basename,
							dtype, pl, istate);
		if (pattern) {
			if (pattern->flags & PATTERN_FLAG_NEGATIVE)
				return NOT_MATCHED;
			else
				return MATCHED;
		}

		return UNDECIDED;
	}

	if (pl->full_cone)
		return MATCHED;

	strbuf_addch(&parent_pathname, '/');
	strbuf_add(&parent_pathname, pathname, pathlen);

	/*
	 * Directory entries are matched if and only if a file
	 * contained immediately within them is matched. For the
	 * case of a directory entry, modify the path to create
	 * a fake filename within this directory, allowing us to
	 * use the file-base matching logic in an equivalent way.
	 */
	if (parent_pathname.len > 0 &&
	    parent_pathname.buf[parent_pathname.len - 1] == '/') {
		slash_pos = parent_pathname.len - 1;
		strbuf_add(&parent_pathname, "-", 1);
	} else {
		const char *slash_ptr = strrchr(parent_pathname.buf, '/');
		slash_pos = slash_ptr ? slash_ptr - parent_pathname.buf : 0;
	}

	if (hashmap_contains_path(&pl->recursive_hashmap,
				  &parent_pathname)) {
		result = MATCHED_RECURSIVE;
		goto done;
	}

	if (!slash_pos) {
		/* include every file in root */
		result = MATCHED;
		goto done;
	}