ls-remote: resurrect pattern limit support

"git ls-remote $remote $name1 $name2..." used to limit the output to
refs that end with one of the $name given from the command line, but
recent rewrite to C forgot to implement that support.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-ls-remote.c b/builtin-ls-remote.c
index 56f3f880238e79a92ac35b4112e425a05c3fe916..e5d670a93a48893ab5167bb394f9425fc23d8a06 100644 (file)
--- a/builtin-ls-remote.c
+++ b/builtin-ls-remote.c
@@ -6,6 +6,35 @@
 static const char ls_remote_usage[] =
 "git-ls-remote [--upload-pack=<git-upload-pack>] [<host>:]<directory>";
 
+/*
+ * pattern is a list of tail-part of accepted refnames.  Is there one
+ * among them that is a suffix of the path?  Directory boundary must
+ * be honored when checking this match.  IOW, patterns "master" and
+ * "sa/master" both match path "refs/hold/sa/master".  On the other
+ * hand, path "refs/hold/foosa/master" is matched by "master" but not
+ * by "sa/master".
+ */
+
+static int tail_match(const char **pattern, const char *path)
+{
+       int pathlen;
+       const char *p;
+
+       if (!*pattern)
+               return 1; /* no restriction */
+
+       for (pathlen = strlen(path); (p = *pattern); pattern++) {
+               int pfxlen = pathlen - strlen(p);
+               if (pfxlen < 0)
+                       continue; /* pattern is longer, will never match */
+               if (strcmp(path + pfxlen, p))
+                       continue; /* no tail match */
+               if (!pfxlen || path[pfxlen - 1] == '/')
+                       return 1; /* fully match at directory boundary */
+       }
+       return 0;
+}
+
 int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 {
        int i;
@@ -13,6 +42,7 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
        int nongit = 0;
        unsigned flags = 0;
        const char *uploadpack = NULL;
+       const char **pattern = NULL;
 
        struct remote *remote;
        struct transport *transport;
@@ -50,9 +80,9 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
                break;
        }
 
-       if (!dest || i != argc - 1)
+       if (!dest)
                usage(ls_remote_usage);
-
+       pattern = argv + i + 1;
        remote = nongit ? NULL : remote_get(dest);
        if (remote && !remote->url_nr)
                die("remote %s has no configured URL", dest);
@@ -65,10 +95,12 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
        if (!ref)
                return 1;
 
-       while (ref) {
-               if (check_ref_type(ref, flags))
-                       printf("%s      %s\n", sha1_to_hex(ref->old_sha1), ref->name);
-               ref = ref->next;
+       for ( ; ref; ref = ref->next) {
+               if (!check_ref_type(ref, flags))
+                       continue;
+               if (!tail_match(pattern, ref->name))
+                       continue;
+               printf("%s      %s\n", sha1_to_hex(ref->old_sha1), ref->name);
        }
        return 0;
 }