[PATCH] show-ref: allow glob-style ref matching

[Matthias Lederhofer <matled@gmx.net>]

show-ref without --verify will try to match pattern with
fnmatch against the full refname and every suffix starting
at a / in refname
---
I've been using ls .git/refs/tags/v1.4.* and other glob patterns to
take a look at refs.  This allows to use such patterns with show-ref.
If this patch is accepted I'll add the missing documentation.
---
 builtin-show-ref.c |   21 ++++++++++-----------
 1 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/builtin-show-ref.c b/builtin-show-ref.c
index 853f13f..64a1246 100644
--- a/builtin-show-ref.c
+++ b/builtin-show-ref.c
@@ -34,21 +34,20 @@ static int show_ref(const char *refname, const unsigned char *sha1, int flag, vo
 			return 0;
 	}
 	if (pattern) {
-		int reflen = strlen(refname);
 		const char **p = pattern, *m;
 		while ((m = *p++) != NULL) {
-			int len = strlen(m);
-			if (len > reflen)
-				continue;
-			if (memcmp(m, refname + reflen - len, len))
-				continue;
-			if (len == reflen)
-				goto match;
+			const char *r = refname;
 			/* "--verify" requires an exact match */
-			if (verify)
+			if (verify) {
+				if (strcmp(m, refname))
+					goto match;
 				continue;
-			if (refname[reflen - len - 1] == '/')
-				goto match;
+			}
+			do {
+				if (!fnmatch(m, r, 0))
+					goto match;
+				r = index(r, '/');
+			} while (r++);
 		}
 		return 0;
 	}
-- 
1.5.0.rc2.g18af