git-whatchanged: Add usage string

diff --git a/send-pack.c b/send-pack.c
index 3eeb18f7c7d32412003ea665a47081dc06d84c95..6ce0d9f7884e34c9dc6c90f98bc9f7745c07e12a 100644 (file)
--- a/send-pack.c
+++ b/send-pack.c
@@ -179,6 +179,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
 {
        struct ref *ref;
        int new_refs;
+       int ret = 0;
 
        /* No funny business with the matcher */
        remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, 1);
@@ -190,6 +191,12 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        if (match_refs(local_refs, remote_refs, &remote_tail,
                       nr_refspec, refspec, send_all))
                return -1;
+
+       if (!remote_refs) {
+               fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
+               return 0;
+       }
+
        /*
         * Finally, tell the other end!
         */
@@ -226,6 +233,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
                                error("remote '%s' object %s does not "
                                      "exist on local",
                                      ref->name, sha1_to_hex(ref->old_sha1));
+                               ret = -2;
                                continue;
                        }
 
@@ -239,12 +247,14 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
                                error("remote ref '%s' is not a strict "
                                      "subset of local ref '%s'.", ref->name,
                                      ref->peer_ref->name);
+                               ret = -2;
                                continue;
                        }
                }
                memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
                if (is_zero_sha1(ref->new_sha1)) {
                        error("cannot happen anymore");
+                       ret = -3;
                        continue;
                }
                new_refs++;
@@ -261,7 +271,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        if (new_refs)
                pack_objects(out, remote_refs);
        close(out);
-       return 0;
+       return ret;
 }
 
 
@@ -273,6 +283,7 @@ int main(int argc, char **argv)
        int fd[2], ret;
        pid_t pid;
 
+       setup_git_directory();
        argv++;
        for (i = 1; i < argc; i++, argv++) {
                char *arg = *argv;