Documentation: don't assume git-sh-setup and git-parse-remote are in PATH
[gitweb.git] / remote.c
index 95d65a07ef3b2a1076936e47bb98d5b6095c95e7..ff2c8021678fee5ef12060d35c6eb1960e8792c7 100644 (file)
--- a/remote.c
+++ b/remote.c
 #include "remote.h"
 #include "refs.h"
 
+static struct refspec s_tag_refspec = {
+       0,
+       1,
+       0,
+       "refs/tags/",
+       "refs/tags/"
+};
+
+const struct refspec *tag_refspec = &s_tag_refspec;
+
+struct counted_string {
+       size_t len;
+       const char *s;
+};
+struct rewrite {
+       const char *base;
+       size_t baselen;
+       struct counted_string *instead_of;
+       int instead_of_nr;
+       int instead_of_alloc;
+};
+
 static struct remote **remotes;
-static int allocated_remotes;
+static int remotes_alloc;
+static int remotes_nr;
 
 static struct branch **branches;
-static int allocated_branches;
+static int branches_alloc;
+static int branches_nr;
 
 static struct branch *current_branch;
 static const char *default_remote_name;
 
+static struct rewrite **rewrite;
+static int rewrite_alloc;
+static int rewrite_nr;
+
 #define BUF_SIZE (2048)
 static char buffer[BUF_SIZE];
 
+static const char *alias_url(const char *url)
+{
+       int i, j;
+       char *ret;
+       struct counted_string *longest;
+       int longest_i;
+
+       longest = NULL;
+       longest_i = -1;
+       for (i = 0; i < rewrite_nr; i++) {
+               if (!rewrite[i])
+                       continue;
+               for (j = 0; j < rewrite[i]->instead_of_nr; j++) {
+                       if (!prefixcmp(url, rewrite[i]->instead_of[j].s) &&
+                           (!longest ||
+                            longest->len < rewrite[i]->instead_of[j].len)) {
+                               longest = &(rewrite[i]->instead_of[j]);
+                               longest_i = i;
+                       }
+               }
+       }
+       if (!longest)
+               return url;
+
+       ret = malloc(rewrite[longest_i]->baselen +
+                    (strlen(url) - longest->len) + 1);
+       strcpy(ret, rewrite[longest_i]->base);
+       strcpy(ret + rewrite[longest_i]->baselen, url + longest->len);
+       return ret;
+}
+
 static void add_push_refspec(struct remote *remote, const char *ref)
 {
-       int nr = remote->push_refspec_nr + 1;
-       remote->push_refspec =
-               xrealloc(remote->push_refspec, nr * sizeof(char *));
-       remote->push_refspec[nr-1] = ref;
-       remote->push_refspec_nr = nr;
+       ALLOC_GROW(remote->push_refspec,
+                  remote->push_refspec_nr + 1,
+                  remote->push_refspec_alloc);
+       remote->push_refspec[remote->push_refspec_nr++] = ref;
 }
 
 static void add_fetch_refspec(struct remote *remote, const char *ref)
 {
-       int nr = remote->fetch_refspec_nr + 1;
-       remote->fetch_refspec =
-               xrealloc(remote->fetch_refspec, nr * sizeof(char *));
-       remote->fetch_refspec[nr-1] = ref;
-       remote->fetch_refspec_nr = nr;
+       ALLOC_GROW(remote->fetch_refspec,
+                  remote->fetch_refspec_nr + 1,
+                  remote->fetch_refspec_alloc);
+       remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
 }
 
 static void add_url(struct remote *remote, const char *url)
 {
-       int nr = remote->url_nr + 1;
-       remote->url =
-               xrealloc(remote->url, nr * sizeof(char *));
-       remote->url[nr-1] = url;
-       remote->url_nr = nr;
+       ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
+       remote->url[remote->url_nr++] = url;
+}
+
+static void add_url_alias(struct remote *remote, const char *url)
+{
+       add_url(remote, alias_url(url));
 }
 
 static struct remote *make_remote(const char *name, int len)
 {
-       int i, empty = -1;
+       struct remote *ret;
+       int i;
 
-       for (i = 0; i < allocated_remotes; i++) {
-               if (!remotes[i]) {
-                       if (empty < 0)
-                               empty = i;
-               } else {
-                       if (len ? (!strncmp(name, remotes[i]->name, len) &&
-                                  !remotes[i]->name[len]) :
-                           !strcmp(name, remotes[i]->name))
-                               return remotes[i];
-               }
+       for (i = 0; i < remotes_nr; i++) {
+               if (len ? (!strncmp(name, remotes[i]->name, len) &&
+                          !remotes[i]->name[len]) :
+                   !strcmp(name, remotes[i]->name))
+                       return remotes[i];
        }
 
-       if (empty < 0) {
-               empty = allocated_remotes;
-               allocated_remotes += allocated_remotes ? allocated_remotes : 1;
-               remotes = xrealloc(remotes,
-                                  sizeof(*remotes) * allocated_remotes);
-               memset(remotes + empty, 0,
-                      (allocated_remotes - empty) * sizeof(*remotes));
-       }
-       remotes[empty] = xcalloc(1, sizeof(struct remote));
+       ret = xcalloc(1, sizeof(struct remote));
+       ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
+       remotes[remotes_nr++] = ret;
        if (len)
-               remotes[empty]->name = xstrndup(name, len);
+               ret->name = xstrndup(name, len);
        else
-               remotes[empty]->name = xstrdup(name);
-       return remotes[empty];
+               ret->name = xstrdup(name);
+       return ret;
 }
 
 static void add_merge(struct branch *branch, const char *name)
 {
-       int nr = branch->merge_nr + 1;
-       branch->merge_name =
-               xrealloc(branch->merge_name, nr * sizeof(char *));
-       branch->merge_name[nr-1] = name;
-       branch->merge_nr = nr;
+       ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
+                  branch->merge_alloc);
+       branch->merge_name[branch->merge_nr++] = name;
 }
 
 static struct branch *make_branch(const char *name, int len)
 {
-       int i, empty = -1;
+       struct branch *ret;
+       int i;
        char *refname;
 
-       for (i = 0; i < allocated_branches; i++) {
-               if (!branches[i]) {
-                       if (empty < 0)
-                               empty = i;
-               } else {
-                       if (len ? (!strncmp(name, branches[i]->name, len) &&
-                                  !branches[i]->name[len]) :
-                           !strcmp(name, branches[i]->name))
-                               return branches[i];
-               }
+       for (i = 0; i < branches_nr; i++) {
+               if (len ? (!strncmp(name, branches[i]->name, len) &&
+                          !branches[i]->name[len]) :
+                   !strcmp(name, branches[i]->name))
+                       return branches[i];
        }
 
-       if (empty < 0) {
-               empty = allocated_branches;
-               allocated_branches += allocated_branches ? allocated_branches : 1;
-               branches = xrealloc(branches,
-                                  sizeof(*branches) * allocated_branches);
-               memset(branches + empty, 0,
-                      (allocated_branches - empty) * sizeof(*branches));
-       }
-       branches[empty] = xcalloc(1, sizeof(struct branch));
+       ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
+       ret = xcalloc(1, sizeof(struct branch));
+       branches[branches_nr++] = ret;
        if (len)
-               branches[empty]->name = xstrndup(name, len);
+               ret->name = xstrndup(name, len);
        else
-               branches[empty]->name = xstrdup(name);
+               ret->name = xstrdup(name);
        refname = malloc(strlen(name) + strlen("refs/heads/") + 1);
        strcpy(refname, "refs/heads/");
-       strcpy(refname + strlen("refs/heads/"),
-              branches[empty]->name);
-       branches[empty]->refname = refname;
+       strcpy(refname + strlen("refs/heads/"), ret->name);
+       ret->refname = refname;
+
+       return ret;
+}
+
+static struct rewrite *make_rewrite(const char *base, int len)
+{
+       struct rewrite *ret;
+       int i;
+
+       for (i = 0; i < rewrite_nr; i++) {
+               if (len
+                   ? (len == rewrite[i]->baselen &&
+                      !strncmp(base, rewrite[i]->base, len))
+                   : !strcmp(base, rewrite[i]->base))
+                       return rewrite[i];
+       }
 
-       return branches[empty];
+       ALLOC_GROW(rewrite, rewrite_nr + 1, rewrite_alloc);
+       ret = xcalloc(1, sizeof(struct rewrite));
+       rewrite[rewrite_nr++] = ret;
+       if (len) {
+               ret->base = xstrndup(base, len);
+               ret->baselen = len;
+       }
+       else {
+               ret->base = xstrdup(base);
+               ret->baselen = strlen(base);
+       }
+       return ret;
+}
+
+static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
+{
+       ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
+       rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
+       rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
+       rewrite->instead_of_nr++;
 }
 
 static void read_remotes_file(struct remote *remote)
@@ -154,7 +225,7 @@ static void read_remotes_file(struct remote *remote)
 
                switch (value_list) {
                case 0:
-                       add_url(remote, xstrdup(s));
+                       add_url_alias(remote, xstrdup(s));
                        break;
                case 1:
                        add_push_refspec(remote, xstrdup(s));
@@ -171,7 +242,7 @@ static void read_branches_file(struct remote *remote)
 {
        const char *slash = strchr(remote->name, '/');
        char *frag;
-       char *branch;
+       struct strbuf branch;
        int n = slash ? slash - remote->name : 1000;
        FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
        char *s, *p;
@@ -197,21 +268,37 @@ static void read_branches_file(struct remote *remote)
        strcpy(p, s);
        if (slash)
                strcat(p, slash);
+
+       /*
+        * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
+        * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
+        * the partial URL obtained from the branches file plus
+        * "/netdev-2.6" and does not store it in any tracking ref.
+        * #branch specifier in the file is ignored.
+        *
+        * Otherwise, the branches file would have URL and optionally
+        * #branch specified.  The "master" (or specified) branch is
+        * fetched and stored in the local branch of the same name.
+        */
+       strbuf_init(&branch, 0);
        frag = strchr(p, '#');
        if (frag) {
                *(frag++) = '\0';
-               branch = xmalloc(strlen(frag) + 12);
-               strcpy(branch, "refs/heads/");
-               strcat(branch, frag);
+               strbuf_addf(&branch, "refs/heads/%s", frag);
+       } else
+               strbuf_addstr(&branch, "refs/heads/master");
+       if (!slash) {
+               strbuf_addf(&branch, ":refs/heads/%s", remote->name);
        } else {
-               branch = "refs/heads/master";
+               strbuf_reset(&branch);
+               strbuf_addstr(&branch, "HEAD:");
        }
-       add_url(remote, p);
-       add_fetch_refspec(remote, branch);
+       add_url_alias(remote, p);
+       add_fetch_refspec(remote, strbuf_detach(&branch, 0));
        remote->fetch_tags = 1; /* always auto-follow */
 }
 
-static int handle_config(const char *key, const char *value)
+static int handle_config(const char *key, const char *value, void *cb)
 {
        const char *name;
        const char *subkey;
@@ -236,6 +323,19 @@ static int handle_config(const char *key, const char *value)
                }
                return 0;
        }
+       if (!prefixcmp(key, "url.")) {
+               struct rewrite *rewrite;
+               name = key + 4;
+               subkey = strrchr(name, '.');
+               if (!subkey)
+                       return 0;
+               rewrite = make_rewrite(name, subkey - name);
+               if (!strcmp(subkey, ".insteadof")) {
+                       if (!value)
+                               return config_error_nonbool(key);
+                       add_instead_of(rewrite, xstrdup(value));
+               }
+       }
        if (prefixcmp(key,  "remote."))
                return 0;
        name = key + 7;
@@ -247,46 +347,64 @@ static int handle_config(const char *key, const char *value)
                return 0;
        }
        remote = make_remote(name, subkey - name);
-       if (!value) {
-               /* if we ever have a boolean variable, e.g. "remote.*.disabled"
-                * [remote "frotz"]
-                *      disabled
-                * is a valid way to set it to true; we get NULL in value so
-                * we need to handle it here.
-                *
-                * if (!strcmp(subkey, ".disabled")) {
-                *      val = git_config_bool(key, value);
-                *      return 0;
-                * } else
-                *
-                */
-               return 0; /* ignore unknown booleans */
-       }
-       if (!strcmp(subkey, ".url")) {
-               add_url(remote, xstrdup(value));
+       if (!strcmp(subkey, ".mirror"))
+               remote->mirror = git_config_bool(key, value);
+       else if (!strcmp(subkey, ".skipdefaultupdate"))
+               remote->skip_default_update = git_config_bool(key, value);
+
+       else if (!strcmp(subkey, ".url")) {
+               const char *v;
+               if (git_config_string(&v, key, value))
+                       return -1;
+               add_url(remote, v);
        } else if (!strcmp(subkey, ".push")) {
-               add_push_refspec(remote, xstrdup(value));
+               const char *v;
+               if (git_config_string(&v, key, value))
+                       return -1;
+               add_push_refspec(remote, v);
        } else if (!strcmp(subkey, ".fetch")) {
-               add_fetch_refspec(remote, xstrdup(value));
+               const char *v;
+               if (git_config_string(&v, key, value))
+                       return -1;
+               add_fetch_refspec(remote, v);
        } else if (!strcmp(subkey, ".receivepack")) {
+               const char *v;
+               if (git_config_string(&v, key, value))
+                       return -1;
                if (!remote->receivepack)
-                       remote->receivepack = xstrdup(value);
+                       remote->receivepack = v;
                else
                        error("more than one receivepack given, using the first");
        } else if (!strcmp(subkey, ".uploadpack")) {
+               const char *v;
+               if (git_config_string(&v, key, value))
+                       return -1;
                if (!remote->uploadpack)
-                       remote->uploadpack = xstrdup(value);
+                       remote->uploadpack = v;
                else
                        error("more than one uploadpack given, using the first");
        } else if (!strcmp(subkey, ".tagopt")) {
                if (!strcmp(value, "--no-tags"))
                        remote->fetch_tags = -1;
        } else if (!strcmp(subkey, ".proxy")) {
-               remote->http_proxy = xstrdup(value);
+               return git_config_string((const char **)&remote->http_proxy,
+                                        key, value);
        }
        return 0;
 }
 
+static void alias_all_urls(void)
+{
+       int i, j;
+       for (i = 0; i < remotes_nr; i++) {
+               if (!remotes[i])
+                       continue;
+               for (j = 0; j < remotes[i]->url_nr; j++) {
+                       remotes[i]->url[j] = alias_url(remotes[i]->url[j]);
+               }
+       }
+}
+
 static void read_config(void)
 {
        unsigned char sha1[20];
@@ -302,10 +420,11 @@ static void read_config(void)
                current_branch =
                        make_branch(head_ref + strlen("refs/heads/"), 0);
        }
-       git_config(handle_config);
+       git_config(handle_config, NULL);
+       alias_all_urls();
 }
 
-static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch)
+static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
 {
        int i;
        int st;
@@ -325,6 +444,16 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
                }
 
                rhs = strrchr(lhs, ':');
+
+               /*
+                * Before going on, special case ":" (or "+:") as a refspec
+                * for matching refs.
+                */
+               if (!fetch && rhs == lhs && rhs[1] == '\0') {
+                       rs[i].matching = 1;
+                       continue;
+               }
+
                if (rhs) {
                        rhs++;
                        rlen = strlen(rhs);
@@ -415,17 +544,32 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
        return rs;
 
  invalid:
+       if (verify) {
+               free(rs);
+               return NULL;
+       }
        die("Invalid refspec '%s'", refspec[i]);
 }
 
+int valid_fetch_refspec(const char *fetch_refspec_str)
+{
+       const char *fetch_refspec[] = { fetch_refspec_str };
+       struct refspec *refspec;
+
+       refspec = parse_refspec_internal(1, fetch_refspec, 1, 1);
+       if (refspec)
+               free(refspec);
+       return !!refspec;
+}
+
 struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
 {
-       return parse_refspec_internal(nr_refspec, refspec, 1);
+       return parse_refspec_internal(nr_refspec, refspec, 1, 0);
 }
 
 struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
 {
-       return parse_refspec_internal(nr_refspec, refspec, 0);
+       return parse_refspec_internal(nr_refspec, refspec, 0, 0);
 }
 
 static int valid_remote_nick(const char *name)
@@ -453,7 +597,7 @@ struct remote *remote_get(const char *name)
                        read_branches_file(ret);
        }
        if (!ret->url)
-               add_url(ret, name);
+               add_url_alias(ret, name);
        if (!ret->url)
                return NULL;
        ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
@@ -465,7 +609,7 @@ int for_each_remote(each_remote_fn fn, void *priv)
 {
        int i, result = 0;
        read_config();
-       for (i = 0; i < allocated_remotes && !result; i++) {
+       for (i = 0; i < remotes_nr && !result; i++) {
                struct remote *r = remotes[i];
                if (!r)
                        continue;
@@ -567,6 +711,13 @@ struct ref *alloc_ref(unsigned namelen)
        return ret;
 }
 
+struct ref *alloc_ref_from_str(const char* str)
+{
+       struct ref *ret = alloc_ref(strlen(str) + 1);
+       strcpy(ret->name, str);
+       return ret;
+}
+
 static struct ref *copy_ref(const struct ref *ref)
 {
        struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
@@ -587,14 +738,22 @@ struct ref *copy_ref_list(const struct ref *ref)
        return ret;
 }
 
+void free_ref(struct ref *ref)
+{
+       if (!ref)
+               return;
+       free(ref->remote_status);
+       free(ref->symref);
+       free(ref);
+}
+
 void free_refs(struct ref *ref)
 {
        struct ref *next;
        while (ref) {
                next = ref->next;
-               if (ref->peer_ref)
-                       free(ref->peer_ref);
-               free(ref);
+               free(ref->peer_ref);
+               free_ref(ref);
                ref = next;
        }
 }
@@ -665,7 +824,6 @@ static struct ref *try_explicit_object_name(const char *name)
 {
        unsigned char sha1[20];
        struct ref *ref;
-       int len;
 
        if (!*name) {
                ref = alloc_ref(20);
@@ -675,36 +833,49 @@ static struct ref *try_explicit_object_name(const char *name)
        }
        if (get_sha1(name, sha1))
                return NULL;
-       len = strlen(name) + 1;
-       ref = alloc_ref(len);
-       memcpy(ref->name, name, len);
+       ref = alloc_ref_from_str(name);
        hashcpy(ref->new_sha1, sha1);
        return ref;
 }
 
 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
 {
-       struct ref *ret;
-       size_t len;
-
-       len = strlen(name) + 1;
-       ret = alloc_ref(len);
-       memcpy(ret->name, name, len);
+       struct ref *ret = alloc_ref_from_str(name);
        tail_link_ref(ret, tail);
        return ret;
 }
 
+static char *guess_ref(const char *name, struct ref *peer)
+{
+       struct strbuf buf = STRBUF_INIT;
+       unsigned char sha1[20];
+
+       const char *r = resolve_ref(peer->name, sha1, 1, NULL);
+       if (!r)
+               return NULL;
+
+       if (!prefixcmp(r, "refs/heads/"))
+               strbuf_addstr(&buf, "refs/heads/");
+       else if (!prefixcmp(r, "refs/tags/"))
+               strbuf_addstr(&buf, "refs/tags/");
+       else
+               return NULL;
+
+       strbuf_addstr(&buf, name);
+       return strbuf_detach(&buf, NULL);
+}
+
 static int match_explicit(struct ref *src, struct ref *dst,
                          struct ref ***dst_tail,
-                         struct refspec *rs,
-                         int errs)
+                         struct refspec *rs)
 {
        struct ref *matched_src, *matched_dst;
 
        const char *dst_value = rs->dst;
+       char *dst_guess;
 
-       if (rs->pattern)
-               return errs;
+       if (rs->pattern || rs->matching)
+               return 0;
 
        matched_src = matched_dst = NULL;
        switch (count_refspec_match(rs->src, src, &matched_src)) {
@@ -717,21 +888,22 @@ static int match_explicit(struct ref *src, struct ref *dst,
                 */
                matched_src = try_explicit_object_name(rs->src);
                if (!matched_src)
-                       error("src refspec %s does not match any.", rs->src);
+                       return error("src refspec %s does not match any.", rs->src);
                break;
        default:
-               matched_src = NULL;
-               error("src refspec %s matches more than one.", rs->src);
-               break;
+               return error("src refspec %s matches more than one.", rs->src);
        }
 
-       if (!matched_src)
-               errs = 1;
-
        if (!dst_value) {
-               if (!matched_src)
-                       return errs;
-               dst_value = matched_src->name;
+               unsigned char sha1[20];
+               int flag;
+
+               dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
+               if (!dst_value ||
+                   ((flag & REF_ISSYMREF) &&
+                    prefixcmp(dst_value, "refs/heads/")))
+                       die("%s cannot be resolved to branch.",
+                           matched_src->name);
        }
 
        switch (count_refspec_match(dst_value, dst, &matched_dst)) {
@@ -740,10 +912,15 @@ static int match_explicit(struct ref *src, struct ref *dst,
        case 0:
                if (!memcmp(dst_value, "refs/", 5))
                        matched_dst = make_linked_ref(dst_value, dst_tail);
+               else if((dst_guess = guess_ref(dst_value, matched_src)))
+                       matched_dst = make_linked_ref(dst_guess, dst_tail);
                else
-                       error("dst refspec %s does not match any "
-                             "existing ref on the remote and does "
-                             "not start with refs/.", dst_value);
+                       error("unable to push to unqualified destination: %s\n"
+                             "The destination refspec neither matches an "
+                             "existing ref on the remote nor\n"
+                             "begins with refs/, and we are unable to "
+                             "guess a prefix based on the source ref.",
+                             dst_value);
                break;
        default:
                matched_dst = NULL;
@@ -751,18 +928,16 @@ static int match_explicit(struct ref *src, struct ref *dst,
                      dst_value);
                break;
        }
-       if (errs || !matched_dst)
-               return 1;
-       if (matched_dst->peer_ref) {
-               errs = 1;
-               error("dst ref %s receives from more than one src.",
+       if (!matched_dst)
+               return -1;
+       if (matched_dst->peer_ref)
+               return error("dst ref %s receives from more than one src.",
                      matched_dst->name);
-       }
        else {
                matched_dst->peer_ref = matched_src;
                matched_dst->force = rs->force;
        }
-       return errs;
+       return 0;
 }
 
 static int match_explicit_refs(struct ref *src, struct ref *dst,
@@ -771,8 +946,8 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
 {
        int i, errs;
        for (i = errs = 0; i < rs_nr; i++)
-               errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
-       return -errs;
+               errs += match_explicit(src, dst, dst_tail, &rs[i]);
+       return errs;
 }
 
 static const struct refspec *check_pattern_match(const struct refspec *rs,
@@ -780,13 +955,23 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
                                                 const struct ref *src)
 {
        int i;
+       int matching_refs = -1;
        for (i = 0; i < rs_nr; i++) {
+               if (rs[i].matching &&
+                   (matching_refs == -1 || rs[i].force)) {
+                       matching_refs = i;
+                       continue;
+               }
+
                if (rs[i].pattern &&
                    !prefixcmp(src->name, rs[i].src) &&
                    src->name[strlen(rs[i].src)] == '/')
                        return rs + i;
        }
-       return NULL;
+       if (matching_refs != -1)
+               return rs + matching_refs;
+       else
+               return NULL;
 }
 
 /*
@@ -797,11 +982,16 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
               int nr_refspec, const char **refspec, int flags)
 {
-       struct refspec *rs =
-               parse_push_refspec(nr_refspec, (const char **) refspec);
+       struct refspec *rs;
        int send_all = flags & MATCH_REFS_ALL;
        int send_mirror = flags & MATCH_REFS_MIRROR;
+       static const char *default_refspec[] = { ":", 0 };
 
+       if (!nr_refspec) {
+               nr_refspec = 1;
+               refspec = default_refspec;
+       }
+       rs = parse_push_refspec(nr_refspec, (const char **) refspec);
        if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
                return -1;
 
@@ -812,48 +1002,50 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
                char *dst_name;
                if (src->peer_ref)
                        continue;
-               if (nr_refspec) {
-                       pat = check_pattern_match(rs, nr_refspec, src);
-                       if (!pat)
-                               continue;
-               }
-               else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+
+               pat = check_pattern_match(rs, nr_refspec, src);
+               if (!pat)
+                       continue;
+
+               if (pat->matching) {
                        /*
                         * "matching refs"; traditionally we pushed everything
                         * including refs outside refs/heads/ hierarchy, but
                         * that does not make much sense these days.
                         */
-                       continue;
+                       if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+                               continue;
+                       dst_name = xstrdup(src->name);
 
-               if (pat) {
+               } else {
                        const char *dst_side = pat->dst ? pat->dst : pat->src;
                        dst_name = xmalloc(strlen(dst_side) +
                                           strlen(src->name) -
                                           strlen(pat->src) + 2);
                        strcpy(dst_name, dst_side);
                        strcat(dst_name, src->name + strlen(pat->src));
-               } else
-                       dst_name = xstrdup(src->name);
+               }
                dst_peer = find_ref_by_name(dst, dst_name);
-               if (dst_peer && dst_peer->peer_ref)
-                       /* We're already sending something to this ref. */
-                       goto free_name;
+               if (dst_peer) {
+                       if (dst_peer->peer_ref)
+                               /* We're already sending something to this ref. */
+                               goto free_name;
+
+               } else {
+                       if (pat->matching && !(send_all || send_mirror))
+                               /*
+                                * Remote doesn't have it, and we have no
+                                * explicit pattern, and we don't have
+                                * --all nor --mirror.
+                                */
+                               goto free_name;
 
-               if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
-                       /*
-                        * Remote doesn't have it, and we have no
-                        * explicit pattern, and we don't have
-                        * --all nor --mirror.
-                        */
-                       goto free_name;
-               if (!dst_peer) {
                        /* Create a new one and link it */
                        dst_peer = make_linked_ref(dst_name, dst_tail);
                        hashcpy(dst_peer->new_sha1, src->new_sha1);
                }
                dst_peer->peer_ref = src;
-               if (pat)
-                       dst_peer->force = pat->force;
+               dst_peer->force = pat->force;
        free_name:
                free(dst_name);
        }
@@ -959,9 +1151,7 @@ static struct ref *get_local_ref(const char *name)
                return NULL;
 
        if (!prefixcmp(name, "refs/")) {
-               ret = alloc_ref(strlen(name) + 1);
-               strcpy(ret->name, name);
-               return ret;
+               return alloc_ref_from_str(name);
        }
 
        if (!prefixcmp(name, "heads/") ||
@@ -1020,3 +1210,15 @@ int get_fetch_map(const struct ref *remote_refs,
 
        return 0;
 }
+
+int resolve_remote_symref(struct ref *ref, struct ref *list)
+{
+       if (!ref->symref)
+               return 0;
+       for (; list; list = list->next)
+               if (!strcmp(ref->symref, list->name)) {
+                       hashcpy(ref->old_sha1, list->old_sha1);
+                       return 0;
+               }
+       return 1;
+}