show-branch --reflog: add documentation.

diff --git a/send-pack.c b/send-pack.c
index 5bb123a37696384c5413dac128529d1c1f679940..cc884f3b2debbaadfc3c42cda20074257fa48a65 100644 (file)
--- a/send-pack.c
+++ b/send-pack.c
@@ -29,6 +29,7 @@ static void exec_pack_objects(void)
 {
        static const char *args[] = {
                "pack-objects",
+               "--all-progress",
                "--stdout",
                NULL
        };
@@ -215,7 +216,7 @@ static int ref_newer(const unsigned char *new_sha1,
 static struct ref *local_refs, **local_tail;
 static struct ref *remote_refs, **remote_tail;
 
-static int one_local_ref(const char *refname, const unsigned char *sha1)
+static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 {
        struct ref *ref;
        int len = strlen(refname) + 1;
@@ -230,7 +231,7 @@ static int one_local_ref(const char *refname, const unsigned char *sha1)
 static void get_local_heads(void)
 {
        local_tail = &local_refs;
-       for_each_ref(one_local_ref);
+       for_each_ref(one_local_ref, NULL);
 }
 
 static int receive_status(int in)
@@ -270,6 +271,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        int new_refs;
        int ret = 0;
        int ask_for_status_report = 0;
+       int allow_deleting_refs = 0;
        int expect_status_report = 0;
 
        /* No funny business with the matcher */
@@ -279,6 +281,8 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        /* Does the other end support the reporting? */
        if (server_supports("report-status"))
                ask_for_status_report = 1;
+       if (server_supports("delete-refs"))
+               allow_deleting_refs = 1;
 
        /* match them up */
        if (!remote_tail)
@@ -298,9 +302,19 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        new_refs = 0;
        for (ref = remote_refs; ref; ref = ref->next) {
                char old_hex[60], *new_hex;
+               int delete_ref;
+
                if (!ref->peer_ref)
                        continue;
-               if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+
+               delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
+               if (delete_ref && !allow_deleting_refs) {
+                       error("remote does not support deleting refs");
+                       ret = -2;
+                       continue;
+               }
+               if (!delete_ref &&
+                   !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
                        if (verbose)
                                fprintf(stderr, "'%s': up-to-date\n", ref->name);
                        continue;
@@ -320,9 +334,13 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
                 *
                 * (3) if both new and old are commit-ish, and new is a
                 *     descendant of old, it is OK.
+                *
+                * (4) regardless of all of the above, removing :B is
+                *     always allowed.
                 */
 
                if (!force_update &&
+                   !delete_ref &&
                    !is_zero_sha1(ref->old_sha1) &&
                    !ref->force) {
                        if (!has_sha1_file(ref->old_sha1) ||
@@ -346,12 +364,8 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
                        }
                }
                hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
-               if (is_zero_sha1(ref->new_sha1)) {
-                       error("cannot happen anymore");
-                       ret = -3;
-                       continue;
-               }
-               new_refs++;
+               if (!delete_ref)
+                       new_refs++;
                strcpy(old_hex, sha1_to_hex(ref->old_sha1));
                new_hex = sha1_to_hex(ref->new_sha1);
 
@@ -365,10 +379,16 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
                else
                        packet_write(out, "%s %s %s",
                                     old_hex, new_hex, ref->name);
-               fprintf(stderr, "updating '%s'", ref->name);
-               if (strcmp(ref->name, ref->peer_ref->name))
-                       fprintf(stderr, " using '%s'", ref->peer_ref->name);
-               fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
+               if (delete_ref)
+                       fprintf(stderr, "deleting '%s'\n", ref->name);
+               else {
+                       fprintf(stderr, "updating '%s'", ref->name);
+                       if (strcmp(ref->name, ref->peer_ref->name))
+                               fprintf(stderr, " using '%s'",
+                                       ref->peer_ref->name);
+                       fprintf(stderr, "\n  from %s\n  to   %s\n",
+                               old_hex, new_hex);
+               }
        }
 
        packet_flush(out);
@@ -386,6 +406,25 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        return ret;
 }
 
+static void verify_remote_names(int nr_heads, char **heads)
+{
+       int i;
+
+       for (i = 0; i < nr_heads; i++) {
+               const char *remote = strchr(heads[i], ':');
+
+               remote = remote ? (remote + 1) : heads[i];
+               switch (check_ref_format(remote)) {
+               case 0: /* ok */
+               case -2: /* ok but a single level -- that is fine for
+                         * a match pattern.
+                         */
+                       continue;
+               }
+               die("remote part of refspec is not a valid name in %s",
+                   heads[i]);
+       }
+}
 
 int main(int argc, char **argv)
 {
@@ -437,6 +476,8 @@ int main(int argc, char **argv)
                usage(send_pack_usage);
        if (heads && send_all)
                usage(send_pack_usage);
+       verify_remote_names(nr_heads, heads);
+
        pid = git_connect(fd, dest, exec);
        if (pid < 0)
                return 1;