[PATCH] Update git-clone documentation

[git.git] / connect.c

diff --git a/connect.c b/connect.c
index a20af1c..825c439 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -82,15 +82,26 @@ int path_match(const char *path, int nr, char **match)
 struct refspec {
        char *src;
        char *dst;
+       char force;
 };
 
+/*
+ * A:B means fast forward remote B with local A.
+ * +A:B means overwrite remote B with local A.
+ * +A is a shorthand for +A:A.
+ * A is a shorthand for A:A.
+ */
 static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
 {
        int i;
-       struct refspec *rs = xmalloc(sizeof(*rs) * (nr_refspec + 1));
+       struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1));
        for (i = 0; i < nr_refspec; i++) {
                char *sp, *dp, *ep;
                sp = refspec[i];
+               if (*sp == '+') {
+                       rs[i].force = 1;
+                       sp++;
+               }
                ep = strchr(sp, ':');
                if (ep) {
                        dp = ep + 1;
@@ -133,6 +144,20 @@ static void link_dst_tail(struct ref *ref, struct ref ***tail)
        **tail = NULL;
 }
 
+static struct ref *try_explicit_object_name(const char *name)
+{
+       unsigned char sha1[20];
+       struct ref *ref;
+       int len;
+       if (get_sha1(name, sha1))
+               return NULL;
+       len = strlen(name) + 1;
+       ref = xcalloc(1, sizeof(*ref) + len);
+       memcpy(ref->name, name, len);
+       memcpy(ref->new_sha1, sha1, 20);
+       return ref;
+}
+
 static int match_explicit_refs(struct ref *src, struct ref *dst,
                               struct ref ***dst_tail, struct refspec *rs)
 {
@@ -145,8 +170,15 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
                case 1:
                        break;
                case 0:
+                       /* The source could be in the get_sha1() format
+                        * not a reference name.
+                        */
+                       matched_src = try_explicit_object_name(rs[i].src);
+                       if (matched_src)
+                               break;
                        errs = 1;
-                       error("src refspec %s does not match any.");
+                       error("src refspec %s does not match any.",
+                             rs[i].src);
                        break;
                default:
                        errs = 1;
@@ -169,7 +201,7 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
                                /* pushing "master:master" when
                                 * remote does not have master yet.
                                 */
-                               int len = strlen(matched_src->name);
+                               int len = strlen(matched_src->name) + 1;
                                matched_dst = xcalloc(1, sizeof(*dst) + len);
                                memcpy(matched_dst->name, matched_src->name,
                                       len);
@@ -190,20 +222,15 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
                }
                if (errs)
                        continue;
-               if (matched_src->peer_ref) {
-                       errs = 1;
-                       error("src ref %s is sent to more than one dst.",
-                             matched_src->name);
-               }
-               else
-                       matched_src->peer_ref = matched_dst;
                if (matched_dst->peer_ref) {
                        errs = 1;
                        error("dst ref %s receives from more than one src.",
                              matched_dst->name);
                }
-               else
+               else {
                        matched_dst->peer_ref = matched_src;
+                       matched_dst->force = rs[i].force;
+               }
        }
        return -errs;
 }
@@ -368,8 +395,17 @@ int git_connect(int fd[2], char *url, const char *prog)
                close(pipefd[0][1]);
                close(pipefd[1][0]);
                close(pipefd[1][1]);
-               if (protocol == PROTO_SSH)
-                       execlp("ssh", "ssh", host, command, NULL);
+               if (protocol == PROTO_SSH) {
+                       const char *ssh, *ssh_basename;
+                       ssh = getenv("GIT_SSH");
+                       if (!ssh) ssh = "ssh";
+                       ssh_basename = strrchr(ssh, '/');
+                       if (!ssh_basename)
+                               ssh_basename = ssh;
+                       else
+                               ssh_basename++;
+                       execlp(ssh, ssh_basename, host, command, NULL);
+               }
                else
                        execlp("sh", "sh", "-c", command, NULL);
                die("exec failed");