Keep '*' in pattern refspecs

In order to do anything more capable with refspecs, the first step is
to keep the entire input. Additionally, validate patterns by checking
for the ref matching the rules for a pattern as given by
check_ref_format(). This requires a slight change to
check_ref_format() to make it enforce the requirement that the '*'
immediately follow a '/'.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs.c

@@ -718,9 +718,7 @@ int check_ref_format(const char *ref)
 		while ((ch = *cp++) != 0) {
 			bad_type = bad_ref_char(ch);
 			if (bad_type) {
-				return (bad_type == 2 && !*cp)
-					? CHECK_REF_FORMAT_WILDCARD
-					: CHECK_REF_FORMAT_ERROR;
+				return CHECK_REF_FORMAT_ERROR;
 			}
 			if (ch == '/')
 				break;

remote.c

@@ -10,8 +10,8 @@ static struct refspec s_tag_refspec = {
 	0,
 	1,
 	0,
-	"refs/tags/",
-	"refs/tags/"
+	"refs/tags/*",
+	"refs/tags/*"
 };
 
 const struct refspec *tag_refspec = &s_tag_refspec;
@@ -451,16 +451,11 @@ static void read_config(void)
  */
 static int verify_refname(char *name, int is_glob)
 {
-	int result, len = -1;
+	int result;
 
-	if (is_glob) {
-		len = strlen(name);
-		assert(name[len - 1] == '/');
-		name[len - 1] = '\0';
-	}
 	result = check_ref_format(name);
-	if (is_glob)
-		name[len - 1] = '/';
+	if (is_glob && result == CHECK_REF_FORMAT_WILDCARD)
+		result = CHECK_REF_FORMAT_OK;
 	return result;
 }
 
@@ -517,15 +512,14 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
 		if (rhs) {
 			size_t rlen = strlen(++rhs);
 			is_glob = (2 <= rlen && !strcmp(rhs + rlen - 2, "/*"));
-			rs[i].dst = xstrndup(rhs, rlen - is_glob);
+			rs[i].dst = xstrndup(rhs, rlen);
 		}
 
 		llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
 		if (2 <= llen && !memcmp(lhs + llen - 2, "/*", 2)) {
 			if ((rhs && !is_glob) || (!rhs && fetch))
 				goto invalid;
 			is_glob = 1;
-			llen--;
 		} else if (rhs && is_glob) {
 			goto invalid;
 		}
@@ -722,10 +716,19 @@ int remote_has_url(struct remote *remote, const char *url)
 static int match_name_with_pattern(const char *key, const char *name,
 				   const char *value, char **result)
 {
-	size_t klen = strlen(key);
-	int ret = !strncmp(key, name, klen);
+	const char *kstar = strchr(key, '*');
+	size_t klen;
+	int ret;
+	if (!kstar)
+		die("Key '%s' of pattern had no '*'", key);
+	klen = kstar - key;
+	ret = !strncmp(key, name, klen);
 	if (ret && value) {
-		size_t vlen = strlen(value);
+		const char *vstar = strchr(value, '*');
+		size_t vlen;
+		if (!vstar)
+			die("Value '%s' of pattern has no '*'", value);
+		vlen = vstar - value;
 		*result = xmalloc(vlen +
 				  strlen(name) -
 				  klen + 1);