Code

detect close failure on just-written file handles
[git.git] / remote.c
index bc27a8e3df59915d13bdca357fbe76789caf646e..500ca4d968753485ac38d44e238e93ab86372c1c 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -17,6 +17,15 @@ static void add_push_refspec(struct remote *remote, const char *ref)
        remote->push_refspec_nr = nr;
 }
 
+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;
+}
+
 static void add_uri(struct remote *remote, const char *uri)
 {
        int nr = remote->uri_nr + 1;
@@ -74,6 +83,9 @@ static void read_remotes_file(struct remote *remote)
                } else if (!prefixcmp(buffer, "Push:")) {
                        value_list = 1;
                        s = buffer + 5;
+               } else if (!prefixcmp(buffer, "Pull:")) {
+                       value_list = 2;
+                       s = buffer + 5;
                } else
                        continue;
 
@@ -93,6 +105,9 @@ static void read_remotes_file(struct remote *remote)
                case 1:
                        add_push_refspec(remote, xstrdup(s));
                        break;
+               case 2:
+                       add_fetch_refspec(remote, xstrdup(s));
+                       break;
                }
        }
        fclose(f);
@@ -174,6 +189,8 @@ static int handle_config(const char *key, const char *value)
                add_uri(remote, xstrdup(value));
        } else if (!strcmp(subkey, ".push")) {
                add_push_refspec(remote, xstrdup(value));
+       } else if (!strcmp(subkey, ".fetch")) {
+               add_fetch_refspec(remote, xstrdup(value));
        } else if (!strcmp(subkey, ".receivepack")) {
                if (!remote->receivepack)
                        remote->receivepack = xstrdup(value);
@@ -257,10 +274,52 @@ struct remote *remote_get(const char *name)
                add_uri(ret, name);
        if (!ret->uri)
                return NULL;
+       ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
        ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
        return ret;
 }
 
+int remote_has_uri(struct remote *remote, const char *uri)
+{
+       int i;
+       for (i = 0; i < remote->uri_nr; i++) {
+               if (!strcmp(remote->uri[i], uri))
+                       return 1;
+       }
+       return 0;
+}
+
+int remote_find_tracking(struct remote *remote, struct refspec *refspec)
+{
+       int i;
+       for (i = 0; i < remote->fetch_refspec_nr; i++) {
+               struct refspec *fetch = &remote->fetch[i];
+               if (!fetch->dst)
+                       continue;
+               if (fetch->pattern) {
+                       if (!prefixcmp(refspec->src, fetch->src)) {
+                               refspec->dst =
+                                       xmalloc(strlen(fetch->dst) +
+                                               strlen(refspec->src) -
+                                               strlen(fetch->src) + 1);
+                               strcpy(refspec->dst, fetch->dst);
+                               strcpy(refspec->dst + strlen(fetch->dst),
+                                      refspec->src + strlen(fetch->src));
+                               refspec->force = fetch->force;
+                               return 0;
+                       }
+               } else {
+                       if (!strcmp(refspec->src, fetch->src)) {
+                               refspec->dst = xstrdup(fetch->dst);
+                               refspec->force = fetch->force;
+                               return 0;
+                       }
+               }
+       }
+       refspec->dst = NULL;
+       return -1;
+}
+
 static int count_refspec_match(const char *pattern,
                               struct ref *refs,
                               struct ref **matched_ref)
@@ -274,7 +333,6 @@ static int count_refspec_match(const char *pattern,
        for (weak_match = match = 0; refs; refs = refs->next) {
                char *name = refs->name;
                int namelen = strlen(name);
-               int weak_match;
 
                if (namelen < patlen ||
                    memcmp(name + namelen - patlen, pattern, patlen))
@@ -347,86 +405,96 @@ static struct ref *try_explicit_object_name(const char *name)
        return ref;
 }
 
-static int match_explicit_refs(struct ref *src, struct ref *dst,
-                              struct ref ***dst_tail, struct refspec *rs,
-                              int rs_nr)
+static struct ref *make_dst(const char *name, struct ref ***dst_tail)
 {
-       int i, errs;
-       for (i = errs = 0; i < rs_nr; i++) {
-               struct ref *matched_src, *matched_dst;
+       struct ref *dst;
+       size_t len;
 
-               const char *dst_value = rs[i].dst;
-               if (dst_value == NULL)
-                       dst_value = rs[i].src;
+       len = strlen(name) + 1;
+       dst = xcalloc(1, sizeof(*dst) + len);
+       memcpy(dst->name, name, len);
+       link_dst_tail(dst, dst_tail);
+       return dst;
+}
 
-               matched_src = matched_dst = NULL;
-               switch (count_refspec_match(rs[i].src, src, &matched_src)) {
-               case 1:
-                       break;
-               case 0:
-                       /* The source could be in the get_sha1() format
-                        * not a reference name.  :refs/other is a
-                        * way to delete 'other' ref at the remote end.
-                        */
-                       matched_src = try_explicit_object_name(rs[i].src);
-                       if (matched_src)
-                               break;
-                       errs = 1;
-                       error("src refspec %s does not match any.",
-                             rs[i].src);
-                       break;
-               default:
-                       errs = 1;
-                       error("src refspec %s matches more than one.",
-                             rs[i].src);
-                       break;
-               }
-               switch (count_refspec_match(dst_value, dst, &matched_dst)) {
-               case 1:
-                       break;
-               case 0:
-                       if (!memcmp(dst_value, "refs/", 5)) {
-                               int len = strlen(dst_value) + 1;
-                               matched_dst = xcalloc(1, sizeof(*dst) + len);
-                               memcpy(matched_dst->name, dst_value, len);
-                               link_dst_tail(matched_dst, dst_tail);
-                       }
-                       else if (!strcmp(rs[i].src, dst_value) &&
-                                matched_src) {
-                               /* pushing "master:master" when
-                                * remote does not have master yet.
-                                */
-                               int len = strlen(matched_src->name) + 1;
-                               matched_dst = xcalloc(1, sizeof(*dst) + len);
-                               memcpy(matched_dst->name, matched_src->name,
-                                      len);
-                               link_dst_tail(matched_dst, dst_tail);
-                       }
-                       else {
-                               errs = 1;
-                               error("dst refspec %s does not match any "
-                                     "existing ref on the remote and does "
-                                     "not start with refs/.", dst_value);
-                       }
-                       break;
-               default:
-                       errs = 1;
-                       error("dst refspec %s matches more than one.",
-                             dst_value);
+static int match_explicit(struct ref *src, struct ref *dst,
+                         struct ref ***dst_tail,
+                         struct refspec *rs,
+                         int errs)
+{
+       struct ref *matched_src, *matched_dst;
+
+       const char *dst_value = rs->dst;
+
+       if (rs->pattern)
+               return errs;
+
+       matched_src = matched_dst = NULL;
+       switch (count_refspec_match(rs->src, src, &matched_src)) {
+       case 1:
+               break;
+       case 0:
+               /* The source could be in the get_sha1() format
+                * not a reference name.  :refs/other is a
+                * way to delete 'other' ref at the remote end.
+                */
+               matched_src = try_explicit_object_name(rs->src);
+               if (matched_src)
                        break;
-               }
-               if (errs)
-                       continue;
-               if (matched_dst->peer_ref) {
-                       errs = 1;
-                       error("dst ref %s receives from more than one src.",
-                             matched_dst->name);
-               }
-               else {
-                       matched_dst->peer_ref = matched_src;
-                       matched_dst->force = rs[i].force;
-               }
+               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;
+       }
+
+       if (!matched_src)
+               errs = 1;
+
+       if (dst_value == NULL)
+               dst_value = matched_src->name;
+
+       switch (count_refspec_match(dst_value, dst, &matched_dst)) {
+       case 1:
+               break;
+       case 0:
+               if (!memcmp(dst_value, "refs/", 5))
+                       matched_dst = make_dst(dst_value, dst_tail);
+               else
+                       error("dst refspec %s does not match any "
+                             "existing ref on the remote and does "
+                             "not start with refs/.", dst_value);
+               break;
+       default:
+               matched_dst = NULL;
+               error("dst refspec %s matches more than one.",
+                     dst_value);
+               break;
+       }
+       if (errs || matched_dst == NULL)
+               return 1;
+       if (matched_dst->peer_ref) {
+               errs = 1;
+               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;
+}
+
+static int match_explicit_refs(struct ref *src, struct ref *dst,
+                              struct ref ***dst_tail, struct refspec *rs,
+                              int rs_nr)
+{
+       int i, errs;
+       for (i = errs = 0; i < rs_nr; i++)
+               errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
        return -errs;
 }
 
@@ -438,32 +506,71 @@ static struct ref *find_ref_by_name(struct ref *list, const char *name)
        return NULL;
 }
 
+static const struct refspec *check_pattern_match(const struct refspec *rs,
+                                                int rs_nr,
+                                                const struct ref *src)
+{
+       int i;
+       for (i = 0; i < rs_nr; i++) {
+               if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
+                       return rs + i;
+       }
+       return NULL;
+}
+
+/*
+ * Note. This is used only by "push"; refspec matching rules for
+ * push and fetch are subtly different, so do not try to reuse it
+ * without thinking.
+ */
 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
               int nr_refspec, char **refspec, int all)
 {
        struct refspec *rs =
                parse_ref_spec(nr_refspec, (const char **) refspec);
 
-       if (nr_refspec)
-               return match_explicit_refs(src, dst, dst_tail, rs, nr_refspec);
+       if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
+               return -1;
 
        /* pick the remainder */
        for ( ; src; src = src->next) {
                struct ref *dst_peer;
+               const struct refspec *pat = NULL;
+               char *dst_name;
                if (src->peer_ref)
                        continue;
-               dst_peer = find_ref_by_name(dst, src->name);
-               if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
-                       continue;
+               if (nr_refspec) {
+                       pat = check_pattern_match(rs, nr_refspec, src);
+                       if (!pat)
+                               continue;
+               }
+
+               if (pat) {
+                       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 && !nr_refspec && !all)
+                       /* Remote doesn't have it, and we have no
+                        * explicit pattern, and we don't have
+                        * --all. */
+                       goto free_name;
                if (!dst_peer) {
                        /* Create a new one and link it */
-                       int len = strlen(src->name) + 1;
-                       dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
-                       memcpy(dst_peer->name, src->name, len);
+                       dst_peer = make_dst(dst_name, dst_tail);
                        hashcpy(dst_peer->new_sha1, src->new_sha1);
-                       link_dst_tail(dst_peer, dst_tail);
                }
                dst_peer->peer_ref = src;
+       free_name:
+               free(dst_name);
        }
        return 0;
 }