remote: separate out the remote_find_tracking logic into query_refspecs

Move the body of remote_find_tracking() to a new helper query_refspecs()
that finds a refspec that matches and applies the transformation, but
explicitly takes the list of refspecs, and make remote_find_tracking() a
thin wrapper of it.

Make apply_refspecs() also use query_refspecs().

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/remote.c b/remote.c
index b8ecfa5d9558e3824872ad6778fc344681cc8d5c..823c82ab7ebb7bb3f6ff44bd0b1a81a0f3463f83 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -828,59 +828,56 @@ static int match_name_with_pattern(const char *key, const char *name,
        return ret;
 }
 
-char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
-                    const char *name)
+static int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
 {
        int i;
-       char *ret = NULL;
-       for (i = 0; i < nr_refspec; i++) {
-               struct refspec *refspec = refspecs + i;
-               if (refspec->pattern) {
-                       if (match_name_with_pattern(refspec->src, name,
-                                                   refspec->dst, &ret))
-                               return ret;
-               } else if (!strcmp(refspec->src, name))
-                       return strdup(refspec->dst);
-       }
-       return NULL;
-}
+       int find_src = !query->src;
 
-int remote_find_tracking(struct remote *remote, struct refspec *refspec)
-{
-       int find_src = refspec->src == NULL;
-       char *needle, **result;
-       int i;
+       if (find_src && !query->dst)
+               return error("query_refspecs: need either src or dst");
 
-       if (find_src) {
-               if (!refspec->dst)
-                       return error("find_tracking: need either src or dst");
-               needle = refspec->dst;
-               result = &refspec->src;
-       } else {
-               needle = refspec->src;
-               result = &refspec->dst;
-       }
+       for (i = 0; i < ref_count; i++) {
+               struct refspec *refspec = &refs[i];
+               const char *key = find_src ? refspec->dst : refspec->src;
+               const char *value = find_src ? refspec->src : refspec->dst;
+               const char *needle = find_src ? query->dst : query->src;
+               char **result = find_src ? &query->src : &query->dst;
 
-       for (i = 0; i < remote->fetch_refspec_nr; i++) {
-               struct refspec *fetch = &remote->fetch[i];
-               const char *key = find_src ? fetch->dst : fetch->src;
-               const char *value = find_src ? fetch->src : fetch->dst;
-               if (!fetch->dst)
+               if (!refspec->dst)
                        continue;
-               if (fetch->pattern) {
+               if (refspec->pattern) {
                        if (match_name_with_pattern(key, needle, value, result)) {
-                               refspec->force = fetch->force;
+                               query->force = refspec->force;
                                return 0;
                        }
                } else if (!strcmp(needle, key)) {
                        *result = xstrdup(value);
-                       refspec->force = fetch->force;
+                       query->force = refspec->force;
                        return 0;
                }
        }
        return -1;
 }
 
+char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
+                    const char *name)
+{
+       struct refspec query;
+
+       memset(&query, 0, sizeof(struct refspec));
+       query.src = (char *)name;
+
+       if (query_refspecs(refspecs, nr_refspec, &query))
+               return NULL;
+
+       return query.dst;
+}
+
+int remote_find_tracking(struct remote *remote, struct refspec *refspec)
+{
+       return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
+}
+
 static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
                const char *name)
 {