Merge branch 'aw/mirror-push' into jk/send-pack

* aw/mirror-push:
  git-push: add documentation for the newly added --mirror mode
  Add tests for git push'es mirror mode
  git-push: plumb in --mirror mode
  Teach send-pack a mirror mode
  send-pack: segfault fix on forced push
  send-pack: require --verbose to show update of tracking refs
  receive-pack: don't mention successful updates
  more terse push output

Conflicts:

	transport.c
	transport.h

1 files changed, 99 insertions, 28 deletions

diff --git a/builtin-send-pack.c b/builtin-send-pack.c
index 22cb50bc2..418925eb0 100644
--- a/builtin-send-pack.c
+++ b/builtin-send-pack.c
@@ -8,7 +8,7 @@
 #include "send-pack.h"
 
 static const char send_pack_usage[] =
-"git-send-pack [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
+"git-send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
 "  --all and explicit <ref> specification are mutually exclusive.";
 
 static struct send_pack_args args = {
@@ -195,7 +195,8 @@ static void update_tracking_ref(struct remote *remote, struct ref *ref)
 		return;
 
 	if (!remote_find_tracking(remote, &rs)) {
-		fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
+		if (args.verbose)
+			fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 		if (is_null_sha1(ref->peer_ref->new_sha1)) {
 			if (delete_ref(rs.dst, NULL))
 				error("Failed to delete");
@@ -206,7 +207,18 @@ static void update_tracking_ref(struct remote *remote, struct ref *ref)
 	}
 }
 
-static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec, const char **refspec)
+static const char *prettify_ref(const char *name)
+{
+	return name + (
+		!prefixcmp(name, "refs/heads/") ? 11 :
+		!prefixcmp(name, "refs/tags/") ? 10 :
+		!prefixcmp(name, "refs/remotes/") ? 13 :
+		0);
+}
+
+#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
+
+static int do_send_pack(int in, int out, struct remote *remote, const char *dest, int nr_refspec, const char **refspec)
 {
 	struct ref *ref;
 	int new_refs;
@@ -214,6 +226,13 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 	int ask_for_status_report = 0;
 	int allow_deleting_refs = 0;
 	int expect_status_report = 0;
+	int shown_dest = 0;
+	int flags = MATCH_REFS_NONE;
+
+	if (args.send_all)
+		flags |= MATCH_REFS_ALL;
+	if (args.send_mirror)
+		flags |= MATCH_REFS_MIRROR;
 
 	/* No funny business with the matcher */
 	remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
@@ -229,7 +248,7 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 	if (!remote_tail)
 		remote_tail = &remote_refs;
 	if (match_refs(local_refs, remote_refs, &remote_tail,
-		       nr_refspec, refspec, args.send_all))
+					       nr_refspec, refspec, flags))
 		return -1;
 
 	if (!remote_refs) {
@@ -245,21 +264,41 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 	for (ref = remote_refs; ref; ref = ref->next) {
 		char old_hex[60], *new_hex;
 		int will_delete_ref;
+		const char *pretty_ref;
+		const char *pretty_peer = NULL; /* only used when not deleting */
+		const unsigned char *new_sha1;
 
-		if (!ref->peer_ref)
-			continue;
+		if (!ref->peer_ref) {
+			if (!args.send_mirror)
+				continue;
+			new_sha1 = null_sha1;
+		}
+		else
+			new_sha1 = ref->peer_ref->new_sha1;
+
+		if (!shown_dest) {
+			fprintf(stderr, "To %s\n", dest);
+			shown_dest = 1;
+		}
 
+		will_delete_ref = is_null_sha1(new_sha1);
+
+		pretty_ref = prettify_ref(ref->name);
+		if (!will_delete_ref)
+			pretty_peer = prettify_ref(ref->peer_ref->name);
 
-		will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
 		if (will_delete_ref && !allow_deleting_refs) {
-			error("remote does not support deleting refs");
+			fprintf(stderr, " ! %-*s %s (remote does not support deleting refs)\n",
+					SUMMARY_WIDTH, "[rejected]", pretty_ref);
 			ret = -2;
 			continue;
 		}
 		if (!will_delete_ref &&
-		    !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+		    !hashcmp(ref->old_sha1, new_sha1)) {
 			if (args.verbose)
-				fprintf(stderr, "'%s': up-to-date\n", ref->name);
+				fprintf(stderr, " = %-*s %s -> %s\n",
+					SUMMARY_WIDTH, "[up to date]",
+					pretty_peer, pretty_ref);
 			continue;
 		}
 
@@ -287,8 +326,7 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 		    !is_null_sha1(ref->old_sha1) &&
 		    !ref->force) {
 			if (!has_sha1_file(ref->old_sha1) ||
-			    !ref_newer(ref->peer_ref->new_sha1,
-				       ref->old_sha1)) {
+			    !ref_newer(new_sha1, ref->old_sha1)) {
 				/* We do not have the remote ref, or
 				 * we know that the remote ref is not
 				 * an ancestor of what we are trying to
@@ -296,17 +334,14 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 				 * commits at the remote end and likely
 				 * we were not up to date to begin with.
 				 */
-				error("remote '%s' is not an ancestor of\n"
-				      " local  '%s'.\n"
-				      " Maybe you are not up-to-date and "
-				      "need to pull first?",
-				      ref->name,
-				      ref->peer_ref->name);
+				fprintf(stderr, " ! %-*s %s -> %s (non-fast forward)\n",
+						SUMMARY_WIDTH, "[rejected]",
+						pretty_peer, pretty_ref);
 				ret = -2;
 				continue;
 			}
 		}
-		hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+		hashcpy(ref->new_sha1, new_sha1);
 		if (!will_delete_ref)
 			new_refs++;
 		strcpy(old_hex, sha1_to_hex(ref->old_sha1));
@@ -325,14 +360,41 @@ static int do_send_pack(int in, int out, struct remote *remote, int nr_refspec,
 					old_hex, new_hex, ref->name);
 		}
 		if (will_delete_ref)
-			fprintf(stderr, "deleting '%s'\n", ref->name);
+			fprintf(stderr, " - %-*s %s\n",
+				SUMMARY_WIDTH, "[deleting]",
+				pretty_ref);
+		else if (is_null_sha1(ref->old_sha1)) {
+			const char *msg;
+
+			if (!prefixcmp(ref->name, "refs/tags/"))
+				msg = "[new tag]";
+			else
+				msg = "[new branch]";
+			fprintf(stderr, " * %-*s %s -> %s\n",
+				SUMMARY_WIDTH, msg,
+				pretty_peer, pretty_ref);
+		}
 		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);
+			char quickref[83];
+			char type = ' ';
+			const char *msg = "";
+			const char *old_abb;
+			old_abb = find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV);
+			strcpy(quickref, old_abb ? old_abb : old_hex);
+			if (ref_newer(ref->peer_ref->new_sha1, ref->old_sha1))
+				strcat(quickref, "..");
+			else {
+				strcat(quickref, "...");
+				type = '+';
+				msg = " (forced update)";
+			}
+			strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+
+			fprintf(stderr, " %c %-*s %s -> %s%s\n",
+				type,
+				SUMMARY_WIDTH, quickref,
+				pretty_peer, pretty_ref,
+				msg);
 		}
 	}
 
@@ -411,6 +473,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 				args.dry_run = 1;
 				continue;
 			}
+			if (!strcmp(arg, "--mirror")) {
+				args.send_mirror = 1;
+				continue;
+			}
 			if (!strcmp(arg, "--force")) {
 				args.force_update = 1;
 				continue;
@@ -435,7 +501,12 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 	}
 	if (!dest)
 		usage(send_pack_usage);
-	if (heads && args.send_all)
+	/*
+	 * --all and --mirror are incompatible; neither makes sense
+	 * with any refspecs.
+	 */
+	if ((heads && (args.send_all || args.send_mirror)) ||
+					(args.send_all && args.send_mirror))
 		usage(send_pack_usage);
 
 	if (remote_name) {
@@ -461,7 +532,7 @@ int send_pack(struct send_pack_args *my_args,
 	verify_remote_names(nr_heads, heads);
 
 	conn = git_connect(fd, dest, args.receivepack, args.verbose ? CONNECT_VERBOSE : 0);
-	ret = do_send_pack(fd[0], fd[1], remote, nr_heads, heads);
+	ret = do_send_pack(fd[0], fd[1], remote, dest, nr_heads, heads);
 	close(fd[0]);
 	close(fd[1]);
 	ret |= finish_connect(conn);