urlmatch: add url_normalize_pattern() helper

In a following commit, we will need to normalize a URL glob pattern
(which may contain '*' in the host portion) and extract its component
offsets (host, path, etc.) for separate matching. Let's export a
dedicated helper function url_normalize_pattern() for that purpose.

It works like url_normalize(), but passes allow_globs=true to the
internal url_normalize_1(), so that '*' characters in the host are
accepted rather than rejected.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

urlmatch.c

@@ -441,6 +441,11 @@ char *url_normalize(const char *url, struct url_info *out_info)
 	return url_normalize_1(url, out_info, false);
 }
 
+char *url_normalize_pattern(const char *url, struct url_info *out_info)
+{
+	return url_normalize_1(url, out_info, true);
+}
+
 char *url_parse(const char *url_orig, struct url_info *out_info)
 {
 	struct strbuf url;

urlmatch.h

@@ -37,6 +37,18 @@ struct url_info {
 char *url_normalize(const char *, struct url_info *);
 char *url_parse(const char *, struct url_info *);
 
+/*
+ * Like url_normalize(), but also allows '*' glob characters in the host
+ * portion. Use this when normalizing URL patterns from user configuration.
+ *
+ * Note that '*' is a valid path character per RFC 3986 (as a sub-delim),
+ * so glob patterns using '*' in the path are also accepted.
+ *
+ * Returns a newly allocated normalized string and fills out_info if
+ * non-NULL, or NULL if the pattern is invalid.
+ */
+char *url_normalize_pattern(const char *url, struct url_info *out_info);
+
 struct urlmatch_item {
 	size_t hostmatch_len;
 	size_t pathmatch_len;