1 files changed, 320 insertions, 463 deletions

diff --git a/transport.c b/transport.c
index 198502d0ba..9bfcf870f9 100644
--- a/transport.c
+++ b/transport.c
@@ -15,133 +15,7 @@
 #include "submodule.h"
 #include "string-list.h"
 #include "sha1-array.h"
-
-/* rsync support */
-
-/*
- * We copy packed-refs and refs/ into a temporary file, then read the
- * loose refs recursively (sorting whenever possible), and then inserting
- * those packed refs that are not yet in the list (not validating, but
- * assuming that the file is sorted).
- *
- * Appears refactoring this from refs.c is too cumbersome.
- */
-
-static int str_cmp(const void *a, const void *b)
-{
-	const char *s1 = a;
-	const char *s2 = b;
-
-	return strcmp(s1, s2);
-}
-
-/* path->buf + name_offset is expected to point to "refs/" */
-
-static int read_loose_refs(struct strbuf *path, int name_offset,
-		struct ref **tail)
-{
-	DIR *dir = opendir(path->buf);
-	struct dirent *de;
-	struct {
-		char **entries;
-		int nr, alloc;
-	} list;
-	int i, pathlen;
-
-	if (!dir)
-		return -1;
-
-	memset (&list, 0, sizeof(list));
-
-	while ((de = readdir(dir))) {
-		if (is_dot_or_dotdot(de->d_name))
-			continue;
-		ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
-		list.entries[list.nr++] = xstrdup(de->d_name);
-	}
-	closedir(dir);
-
-	/* sort the list */
-
-	qsort(list.entries, list.nr, sizeof(char *), str_cmp);
-
-	pathlen = path->len;
-	strbuf_addch(path, '/');
-
-	for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
-		strbuf_addstr(path, list.entries[i]);
-		if (read_loose_refs(path, name_offset, tail)) {
-			int fd = open(path->buf, O_RDONLY);
-			char buffer[40];
-			struct ref *next;
-
-			if (fd < 0)
-				continue;
-			next = alloc_ref(path->buf + name_offset);
-			if (read_in_full(fd, buffer, 40) != 40 ||
-					get_sha1_hex(buffer, next->old_sha1)) {
-				close(fd);
-				free(next);
-				continue;
-			}
-			close(fd);
-			(*tail)->next = next;
-			*tail = next;
-		}
-	}
-	strbuf_setlen(path, pathlen);
-
-	for (i = 0; i < list.nr; i++)
-		free(list.entries[i]);
-	free(list.entries);
-
-	return 0;
-}
-
-/* insert the packed refs for which no loose refs were found */
-
-static void insert_packed_refs(const char *packed_refs, struct ref **list)
-{
-	FILE *f = fopen(packed_refs, "r");
-	static char buffer[PATH_MAX];
-
-	if (!f)
-		return;
-
-	for (;;) {
-		int cmp = 0; /* assigned before used */
-		int len;
-
-		if (!fgets(buffer, sizeof(buffer), f)) {
-			fclose(f);
-			return;
-		}
-
-		if (!isxdigit(buffer[0]))
-			continue;
-		len = strlen(buffer);
-		if (len && buffer[len - 1] == '\n')
-			buffer[--len] = '\0';
-		if (len < 41)
-			continue;
-		while ((*list)->next &&
-				(cmp = strcmp(buffer + 41,
-				      (*list)->next->name)) > 0)
-			list = &(*list)->next;
-		if (!(*list)->next || cmp < 0) {
-			struct ref *next = alloc_ref(buffer + 41);
-			buffer[40] = '\0';
-			if (get_sha1_hex(buffer, next->old_sha1)) {
-				warning ("invalid SHA-1: %s", buffer);
-				free(next);
-				continue;
-			}
-			next->next = (*list)->next;
-			(*list)->next = next;
-			list = &(*list)->next;
-		}
-	}
-}
+#include "sigchain.h"
 
 static void set_upstreams(struct transport *transport, struct ref *refs,
 	int pretend)
@@ -162,7 +36,7 @@ static void set_upstreams(struct transport *transport, struct ref *refs,
 			continue;
 		if (!ref->peer_ref)
 			continue;
-		if (is_null_sha1(ref->new_sha1))
+		if (is_null_oid(&ref->new_oid))
 			continue;
 
 		/* Follow symbolic refs (mainly for HEAD). */
@@ -185,213 +59,12 @@ static void set_upstreams(struct transport *transport, struct ref *refs,
 				localname + 11, transport->remote->name,
 				remotename);
 		else
-			printf("Would set upstream of '%s' to '%s' of '%s'\n",
+			printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
 				localname + 11, remotename + 11,
 				transport->remote->name);
 	}
 }
 
-static const char *rsync_url(const char *url)
-{
-	if (!starts_with(url, "rsync://"))
-		skip_prefix(url, "rsync:", &url);
-	return url;
-}
-
-static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
-{
-	struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
-	struct ref dummy = {NULL}, *tail = &dummy;
-	struct child_process rsync = CHILD_PROCESS_INIT;
-	const char *args[5];
-	int temp_dir_len;
-
-	if (for_push)
-		return NULL;
-
-	/* copy the refs to the temporary directory */
-
-	strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
-	if (!mkdtemp(temp_dir.buf))
-		die_errno ("Could not make temporary directory");
-	temp_dir_len = temp_dir.len;
-
-	strbuf_addstr(&buf, rsync_url(transport->url));
-	strbuf_addstr(&buf, "/refs");
-
-	rsync.argv = args;
-	rsync.stdout_to_stderr = 1;
-	args[0] = "rsync";
-	args[1] = (transport->verbose > 1) ? "-rv" : "-r";
-	args[2] = buf.buf;
-	args[3] = temp_dir.buf;
-	args[4] = NULL;
-
-	if (run_command(&rsync))
-		die ("Could not run rsync to get refs");
-
-	strbuf_reset(&buf);
-	strbuf_addstr(&buf, rsync_url(transport->url));
-	strbuf_addstr(&buf, "/packed-refs");
-
-	args[2] = buf.buf;
-
-	if (run_command(&rsync))
-		die ("Could not run rsync to get refs");
-
-	/* read the copied refs */
-
-	strbuf_addstr(&temp_dir, "/refs");
-	read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
-	strbuf_setlen(&temp_dir, temp_dir_len);
-
-	tail = &dummy;
-	strbuf_addstr(&temp_dir, "/packed-refs");
-	insert_packed_refs(temp_dir.buf, &tail);
-	strbuf_setlen(&temp_dir, temp_dir_len);
-
-	if (remove_dir_recursively(&temp_dir, 0))
-		warning ("Error removing temporary directory %s.",
-				temp_dir.buf);
-
-	strbuf_release(&buf);
-	strbuf_release(&temp_dir);
-
-	return dummy.next;
-}
-
-static int fetch_objs_via_rsync(struct transport *transport,
-				int nr_objs, struct ref **to_fetch)
-{
-	struct child_process rsync = CHILD_PROCESS_INIT;
-
-	rsync.stdout_to_stderr = 1;
-	argv_array_push(&rsync.args, "rsync");
-	argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
-	argv_array_push(&rsync.args, "--ignore-existing");
-	argv_array_push(&rsync.args, "--exclude");
-	argv_array_push(&rsync.args, "info");
-	argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
-	argv_array_push(&rsync.args, get_object_directory());
-
-	/* NEEDSWORK: handle one level of alternates */
-	return run_command(&rsync);
-}
-
-static int write_one_ref(const char *name, const unsigned char *sha1,
-		int flags, void *data)
-{
-	struct strbuf *buf = data;
-	int len = buf->len;
-	FILE *f;
-
-	/* when called via for_each_ref(), flags is non-zero */
-	if (flags && !starts_with(name, "refs/heads/") &&
-			!starts_with(name, "refs/tags/"))
-		return 0;
-
-	strbuf_addstr(buf, name);
-	if (safe_create_leading_directories(buf->buf) ||
-			!(f = fopen(buf->buf, "w")) ||
-			fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
-			fclose(f))
-		return error("problems writing temporary file %s", buf->buf);
-	strbuf_setlen(buf, len);
-	return 0;
-}
-
-static int write_refs_to_temp_dir(struct strbuf *temp_dir,
-		int refspec_nr, const char **refspec)
-{
-	int i;
-
-	for (i = 0; i < refspec_nr; i++) {
-		unsigned char sha1[20];
-		char *ref;
-
-		if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
-			return error("Could not get ref %s", refspec[i]);
-
-		if (write_one_ref(ref, sha1, 0, temp_dir)) {
-			free(ref);
-			return -1;
-		}
-		free(ref);
-	}
-	return 0;
-}
-
-static int rsync_transport_push(struct transport *transport,
-		int refspec_nr, const char **refspec, int flags)
-{
-	struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
-	int result = 0, i;
-	struct child_process rsync = CHILD_PROCESS_INIT;
-	const char *args[10];
-
-	if (flags & TRANSPORT_PUSH_MIRROR)
-		return error("rsync transport does not support mirror mode");
-
-	/* first push the objects */
-
-	strbuf_addstr(&buf, rsync_url(transport->url));
-	strbuf_addch(&buf, '/');
-
-	rsync.argv = args;
-	rsync.stdout_to_stderr = 1;
-	i = 0;
-	args[i++] = "rsync";
-	args[i++] = "-a";
-	if (flags & TRANSPORT_PUSH_DRY_RUN)
-		args[i++] = "--dry-run";
-	if (transport->verbose > 1)
-		args[i++] = "-v";
-	args[i++] = "--ignore-existing";
-	args[i++] = "--exclude";
-	args[i++] = "info";
-	args[i++] = get_object_directory();
-	args[i++] = buf.buf;
-	args[i++] = NULL;
-
-	if (run_command(&rsync))
-		return error("Could not push objects to %s",
-				rsync_url(transport->url));
-
-	/* copy the refs to the temporary directory; they could be packed. */
-
-	strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
-	if (!mkdtemp(temp_dir.buf))
-		die_errno ("Could not make temporary directory");
-	strbuf_addch(&temp_dir, '/');
-
-	if (flags & TRANSPORT_PUSH_ALL) {
-		if (for_each_ref(write_one_ref, &temp_dir))
-			return -1;
-	} else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
-		return -1;
-
-	i = 2;
-	if (flags & TRANSPORT_PUSH_DRY_RUN)
-		args[i++] = "--dry-run";
-	if (!(flags & TRANSPORT_PUSH_FORCE))
-		args[i++] = "--ignore-existing";
-	args[i++] = temp_dir.buf;
-	args[i++] = rsync_url(transport->url);
-	args[i++] = NULL;
-	if (run_command(&rsync))
-		result = error("Could not push to %s",
-				rsync_url(transport->url));
-
-	if (remove_dir_recursively(&temp_dir, 0))
-		warning ("Could not remove temporary directory %s.",
-				temp_dir.buf);
-
-	strbuf_release(&buf);
-	strbuf_release(&temp_dir);
-
-	return result;
-}
-
 struct bundle_transport_data {
 	int fd;
 	struct bundle_header header;
@@ -414,7 +87,7 @@ static struct ref *get_refs_from_bundle(struct transport *transport, int for_pus
 	for (i = 0; i < data->header.references.nr; i++) {
 		struct ref_list_entry *e = data->header.references.list + i;
 		struct ref *ref = alloc_ref(e->name);
-		hashcpy(ref->old_sha1, e->sha1);
+		oidcpy(&ref->old_oid, &e->oid);
 		ref->next = result;
 		result = ref;
 	}
@@ -443,8 +116,8 @@ struct git_transport_data {
 	struct child_process *conn;
 	int fd[2];
 	unsigned got_remote_heads : 1;
-	struct sha1_array extra_have;
-	struct sha1_array shallow;
+	struct oid_array extra_have;
+	struct oid_array shallow;
 };
 
 static int set_git_option(struct git_transport_options *opts,
@@ -475,27 +148,40 @@ static int set_git_option(struct git_transport_options *opts,
 			char *end;
 			opts->depth = strtol(value, &end, 0);
 			if (*end)
-				die("transport: invalid depth option '%s'", value);
+				die(_("transport: invalid depth option '%s'"), value);
 		}
 		return 0;
-	} else if (!strcmp(name, TRANS_OPT_PUSH_CERT)) {
-		opts->push_cert = !!value;
+	} else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
+		opts->deepen_since = value;
+		return 0;
+	} else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
+		opts->deepen_not = (const struct string_list *)value;
+		return 0;
+	} else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
+		opts->deepen_relative = !!value;
 		return 0;
 	}
 	return 1;
 }
 
-static int connect_setup(struct transport *transport, int for_push, int verbose)
+static int connect_setup(struct transport *transport, int for_push)
 {
 	struct git_transport_data *data = transport->data;
+	int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 
 	if (data->conn)
 		return 0;
 
+	switch (transport->family) {
+	case TRANSPORT_FAMILY_ALL: break;
+	case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
+	case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
+	}
+
 	data->conn = git_connect(data->fd, transport->url,
 				 for_push ? data->options.receivepack :
 				 data->options.uploadpack,
-				 verbose ? CONNECT_VERBOSE : 0);
+				 flags);
 
 	return 0;
 }
@@ -505,7 +191,7 @@ static struct ref *get_refs_via_connect(struct transport *transport, int for_pus
 	struct git_transport_data *data = transport->data;
 	struct ref *refs;
 
-	connect_setup(transport, for_push, 0);
+	connect_setup(transport, for_push);
 	get_remote_heads(data->fd[0], NULL, 0, &refs,
 			 for_push ? REF_NORMAL : 0,
 			 &data->extra_have,
@@ -518,6 +204,7 @@ static struct ref *get_refs_via_connect(struct transport *transport, int for_pus
 static int fetch_refs_via_pack(struct transport *transport,
 			       int nr_heads, struct ref **to_fetch)
 {
+	int ret = 0;
 	struct git_transport_data *data = transport->data;
 	struct ref *refs;
 	char *dest = xstrdup(transport->url);
@@ -534,13 +221,16 @@ static int fetch_refs_via_pack(struct transport *transport,
 	args.quiet = (transport->verbose < 0);
 	args.no_progress = !transport->progress;
 	args.depth = data->options.depth;
+	args.deepen_since = data->options.deepen_since;
+	args.deepen_not = data->options.deepen_not;
+	args.deepen_relative = data->options.deepen_relative;
 	args.check_self_contained_and_connected =
 		data->options.check_self_contained_and_connected;
 	args.cloning = transport->cloning;
 	args.update_shallow = data->options.update_shallow;
 
 	if (!data->got_remote_heads) {
-		connect_setup(transport, 0, 0);
+		connect_setup(transport, 0);
 		get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 				 NULL, &data->shallow);
 		data->got_remote_heads = 1;
@@ -552,19 +242,22 @@ static int fetch_refs_via_pack(struct transport *transport,
 			  &transport->pack_lockfile);
 	close(data->fd[0]);
 	close(data->fd[1]);
-	if (finish_connect(data->conn)) {
-		free_refs(refs);
-		refs = NULL;
-	}
+	if (finish_connect(data->conn))
+		ret = -1;
 	data->conn = NULL;
 	data->got_remote_heads = 0;
 	data->options.self_contained_and_connected =
 		args.self_contained_and_connected;
 
+	if (refs == NULL)
+		ret = -1;
+	if (report_unmatched_refs(to_fetch, nr_heads))
+		ret = -1;
+
 	free_refs(refs_tmp);
 	free_refs(refs);
 	free(dest);
-	return (refs ? 0 : -1);
+	return ret;
 }
 
 static int push_had_errors(struct ref *ref)
@@ -610,15 +303,17 @@ void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int v
 		if (verbose)
 			fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 		if (ref->deletion) {
-			delete_ref(rs.dst, NULL, 0);
+			delete_ref(NULL, rs.dst, NULL, 0);
 		} else
 			update_ref("update by push", rs.dst,
-					ref->new_sha1, NULL, 0, 0);
+					ref->new_oid.hash, NULL, 0, 0);
 		free(rs.dst);
 	}
 }
 
-static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
+static void print_ref_status(char flag, const char *summary,
+			     struct ref *to, struct ref *from, const char *msg,
+			     int porcelain, int summary_width)
 {
 	if (porcelain) {
 		if (from)
@@ -630,7 +325,7 @@ static void print_ref_status(char flag, const char *summary, struct ref *to, str
 		else
 			fprintf(stdout, "%s\n", summary);
 	} else {
-		fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
+		fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
 		if (from)
 			fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 		else
@@ -644,130 +339,163 @@ static void print_ref_status(char flag, const char *summary, struct ref *to, str
 	}
 }
 
-static const char *status_abbrev(unsigned char sha1[20])
-{
-	return find_unique_abbrev(sha1, DEFAULT_ABBREV);
-}
-
-static void print_ok_ref_status(struct ref *ref, int porcelain)
+static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
 {
 	if (ref->deletion)
-		print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
-	else if (is_null_sha1(ref->old_sha1))
+		print_ref_status('-', "[deleted]", ref, NULL, NULL,
+				 porcelain, summary_width);
+	else if (is_null_oid(&ref->old_oid))
 		print_ref_status('*',
 			(starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 			"[new branch]"),
-			ref, ref->peer_ref, NULL, porcelain);
+			ref, ref->peer_ref, NULL, porcelain, summary_width);
 	else {
-		char quickref[84];
+		struct strbuf quickref = STRBUF_INIT;
 		char type;
 		const char *msg;
 
-		strcpy(quickref, status_abbrev(ref->old_sha1));
+		strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
+					 DEFAULT_ABBREV);
 		if (ref->forced_update) {
-			strcat(quickref, "...");
+			strbuf_addstr(&quickref, "...");
 			type = '+';
 			msg = "forced update";
 		} else {
-			strcat(quickref, "..");
+			strbuf_addstr(&quickref, "..");
 			type = ' ';
 			msg = NULL;
 		}
-		strcat(quickref, status_abbrev(ref->new_sha1));
+		strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
+					 DEFAULT_ABBREV);
 
-		print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
+		print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
+				 porcelain, summary_width);
+		strbuf_release(&quickref);
 	}
 }
 
-static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
+static int print_one_push_status(struct ref *ref, const char *dest, int count,
+				 int porcelain, int summary_width)
 {
-	if (!count)
-		fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
+	if (!count) {
+		char *url = transport_anonymize_url(dest);
+		fprintf(porcelain ? stdout : stderr, "To %s\n", url);
+		free(url);
+	}
 
 	switch(ref->status) {
 	case REF_STATUS_NONE:
-		print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
+		print_ref_status('X', "[no match]", ref, NULL, NULL,
+				 porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_NODELETE:
 		print_ref_status('!', "[rejected]", ref, NULL,
-						 "remote does not support deleting refs", porcelain);
+				 "remote does not support deleting refs",
+				 porcelain, summary_width);
 		break;
 	case REF_STATUS_UPTODATE:
 		print_ref_status('=', "[up to date]", ref,
-						 ref->peer_ref, NULL, porcelain);
+				 ref->peer_ref, NULL, porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_NONFASTFORWARD:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "non-fast-forward", porcelain);
+				 "non-fast-forward", porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_ALREADY_EXISTS:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "already exists", porcelain);
+				 "already exists", porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_FETCH_FIRST:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "fetch first", porcelain);
+				 "fetch first", porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_NEEDS_FORCE:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "needs force", porcelain);
+				 "needs force", porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_STALE:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "stale info", porcelain);
+				 "stale info", porcelain, summary_width);
 		break;
 	case REF_STATUS_REJECT_SHALLOW:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "new shallow roots not allowed", porcelain);
+				 "new shallow roots not allowed",
+				 porcelain, summary_width);
 		break;
 	case REF_STATUS_REMOTE_REJECT:
 		print_ref_status('!', "[remote rejected]", ref,
-						 ref->deletion ? NULL : ref->peer_ref,
-						 ref->remote_status, porcelain);
+				 ref->deletion ? NULL : ref->peer_ref,
+				 ref->remote_status, porcelain, summary_width);
 		break;
 	case REF_STATUS_EXPECTING_REPORT:
 		print_ref_status('!', "[remote failure]", ref,
-						 ref->deletion ? NULL : ref->peer_ref,
-						 "remote failed to report status", porcelain);
+				 ref->deletion ? NULL : ref->peer_ref,
+				 "remote failed to report status",
+				 porcelain, summary_width);
 		break;
 	case REF_STATUS_ATOMIC_PUSH_FAILED:
 		print_ref_status('!', "[rejected]", ref, ref->peer_ref,
-						 "atomic push failed", porcelain);
+				 "atomic push failed", porcelain, summary_width);
 		break;
 	case REF_STATUS_OK:
-		print_ok_ref_status(ref, porcelain);
+		print_ok_ref_status(ref, porcelain, summary_width);
 		break;
 	}
 
 	return 1;
 }
 
+static int measure_abbrev(const struct object_id *oid, int sofar)
+{
+	char hex[GIT_MAX_HEXSZ + 1];
+	int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
+
+	return (w < sofar) ? sofar : w;
+}
+
+int transport_summary_width(const struct ref *refs)
+{
+	int maxw = -1;
+
+	for (; refs; refs = refs->next) {
+		maxw = measure_abbrev(&refs->old_oid, maxw);
+		maxw = measure_abbrev(&refs->new_oid, maxw);
+	}
+	if (maxw < 0)
+		maxw = FALLBACK_DEFAULT_ABBREV;
+	return (2 * maxw + 3);
+}
+
 void transport_print_push_status(const char *dest, struct ref *refs,
 				  int verbose, int porcelain, unsigned int *reject_reasons)
 {
 	struct ref *ref;
 	int n = 0;
-	unsigned char head_sha1[20];
+	struct object_id head_oid;
 	char *head;
+	int summary_width = transport_summary_width(refs);
 
-	head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
+	head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL);
 
 	if (verbose) {
 		for (ref = refs; ref; ref = ref->next)
 			if (ref->status == REF_STATUS_UPTODATE)
-				n += print_one_push_status(ref, dest, n, porcelain);
+				n += print_one_push_status(ref, dest, n,
+							   porcelain, summary_width);
 	}
 
 	for (ref = refs; ref; ref = ref->next)
 		if (ref->status == REF_STATUS_OK)
-			n += print_one_push_status(ref, dest, n, porcelain);
+			n += print_one_push_status(ref, dest, n,
+						   porcelain, summary_width);
 
 	*reject_reasons = 0;
 	for (ref = refs; ref; ref = ref->next) {
 		if (ref->status != REF_STATUS_NONE &&
 		    ref->status != REF_STATUS_UPTODATE &&
 		    ref->status != REF_STATUS_OK)
-			n += print_one_push_status(ref, dest, n, porcelain);
+			n += print_one_push_status(ref, dest, n,
+						   porcelain, summary_width);
 		if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 			if (head != NULL && !strcmp(head, ref->name))
 				*reject_reasons |= REJECT_NON_FF_HEAD;
@@ -815,7 +543,7 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
 
 	if (!data->got_remote_heads) {
 		struct ref *tmp_refs;
-		connect_setup(transport, 1, 0);
+		connect_setup(transport, 1);
 
 		get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 				 NULL, &data->shallow);
@@ -831,10 +559,17 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
 	args.progress = transport->progress;
 	args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 	args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
-	args.push_cert = !!(flags & TRANSPORT_PUSH_CERT);
 	args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
+	args.push_options = transport->push_options;
 	args.url = transport->url;
 
+	if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
+		args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
+	else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
+		args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
+	else
+		args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
+
 	ret = send_pack(&args, data->fd, data->conn, remote_refs,
 			&data->extra_have);
 
@@ -879,7 +614,7 @@ void transport_take_over(struct transport *transport,
 	struct git_transport_data *data;
 
 	if (!transport->smart_options)
-		die("Bug detected: Taking over transport requires non-NULL "
+		die("BUG: taking over transport requires non-NULL "
 		    "smart_options field.");
 
 	data = xcalloc(1, sizeof(*data));
@@ -933,21 +668,89 @@ static const struct string_list *protocol_whitelist(void)
 	return enabled ? &allowed : NULL;
 }
 
-int is_transport_allowed(const char *type)
+enum protocol_allow_config {
+	PROTOCOL_ALLOW_NEVER = 0,
+	PROTOCOL_ALLOW_USER_ONLY,
+	PROTOCOL_ALLOW_ALWAYS
+};
+
+static enum protocol_allow_config parse_protocol_config(const char *key,
+							const char *value)
 {
-	const struct string_list *allowed = protocol_whitelist();
-	return !allowed || string_list_has_string(allowed, type);
+	if (!strcasecmp(value, "always"))
+		return PROTOCOL_ALLOW_ALWAYS;
+	else if (!strcasecmp(value, "never"))
+		return PROTOCOL_ALLOW_NEVER;
+	else if (!strcasecmp(value, "user"))
+		return PROTOCOL_ALLOW_USER_ONLY;
+
+	die("unknown value for config '%s': %s", key, value);
 }
 
-void transport_check_allowed(const char *type)
+static enum protocol_allow_config get_protocol_config(const char *type)
 {
-	if (!is_transport_allowed(type))
-		die("transport '%s' not allowed", type);
+	char *key = xstrfmt("protocol.%s.allow", type);
+	char *value;
+
+	/* first check the per-protocol config */
+	if (!git_config_get_string(key, &value)) {
+		enum protocol_allow_config ret =
+			parse_protocol_config(key, value);
+		free(key);
+		free(value);
+		return ret;
+	}
+	free(key);
+
+	/* if defined, fallback to user-defined default for unknown protocols */
+	if (!git_config_get_string("protocol.allow", &value)) {
+		enum protocol_allow_config ret =
+			parse_protocol_config("protocol.allow", value);
+		free(value);
+		return ret;
+	}
+
+	/* fallback to built-in defaults */
+	/* known safe */
+	if (!strcmp(type, "http") ||
+	    !strcmp(type, "https") ||
+	    !strcmp(type, "git") ||
+	    !strcmp(type, "ssh") ||
+	    !strcmp(type, "file"))
+		return PROTOCOL_ALLOW_ALWAYS;
+
+	/* known scary; err on the side of caution */
+	if (!strcmp(type, "ext"))
+		return PROTOCOL_ALLOW_NEVER;
+
+	/* unknown; by default let them be used only directly by the user */
+	return PROTOCOL_ALLOW_USER_ONLY;
+}
+
+int is_transport_allowed(const char *type, int from_user)
+{
+	const struct string_list *whitelist = protocol_whitelist();
+	if (whitelist)
+		return string_list_has_string(whitelist, type);
+
+	switch (get_protocol_config(type)) {
+	case PROTOCOL_ALLOW_ALWAYS:
+		return 1;
+	case PROTOCOL_ALLOW_NEVER:
+		return 0;
+	case PROTOCOL_ALLOW_USER_ONLY:
+		if (from_user < 0)
+			from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
+		return from_user;
+	}
+
+	die("BUG: invalid protocol_allow_config type");
 }
 
-int transport_restrict_protocols(void)
+void transport_check_allowed(const char *type)
 {
-	return !!protocol_whitelist();
+	if (!is_transport_allowed(type, -1))
+		die("transport '%s' not allowed", type);
 }
 
 struct transport *transport_get(struct remote *remote, const char *url)
@@ -981,11 +784,7 @@ struct transport *transport_get(struct remote *remote, const char *url)
 	if (helper) {
 		transport_helper_init(ret, helper);
 	} else if (starts_with(url, "rsync:")) {
-		transport_check_allowed("rsync");
-		ret->get_refs_list = get_refs_via_rsync;
-		ret->fetch = fetch_objs_via_rsync;
-		ret->push = rsync_transport_push;
-		ret->smart_options = NULL;
+		die("git-over-rsync is no longer supported");
 	} else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 		struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 		transport_check_allowed("file");
@@ -998,8 +797,9 @@ struct transport *transport_get(struct remote *remote, const char *url)
 		|| starts_with(url, "file://")
 		|| starts_with(url, "git://")
 		|| starts_with(url, "ssh://")
-		|| starts_with(url, "git+ssh://")
-		|| starts_with(url, "ssh+git://")) {
+		|| starts_with(url, "git+ssh://") /* deprecated - do not use */
+		|| starts_with(url, "ssh+git://") /* deprecated - do not use */
+		) {
 		/*
 		 * These are builtin smart transports; "allowed" transports
 		 * will be checked individually in git_connect.
@@ -1086,19 +886,19 @@ static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 {
 	int i;
 
-	fprintf(stderr, "The following submodule paths contain changes that can\n"
-			"not be found on any remote:\n");
+	fprintf(stderr, _("The following submodule paths contain changes that can\n"
+			"not be found on any remote:\n"));
 	for (i = 0; i < needs_pushing->nr; i++)
-		printf("  %s\n", needs_pushing->items[i].string);
-	fprintf(stderr, "\nPlease try\n\n"
-			"	git push --recurse-submodules=on-demand\n\n"
-			"or cd to the path and use\n\n"
-			"	git push\n\n"
-			"to push them to a remote.\n\n");
+		fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
+	fprintf(stderr, _("\nPlease try\n\n"
+			  "	git push --recurse-submodules=on-demand\n\n"
+			  "or cd to the path and use\n\n"
+			  "	git push\n\n"
+			  "to push them to a remote.\n\n"));
 
 	string_list_clear(needs_pushing, 0);
 
-	die("Aborting.");
+	die(_("Aborting."));
 }
 
 static int run_pre_push_hook(struct transport *transport,
@@ -1125,6 +925,8 @@ static int run_pre_push_hook(struct transport *transport,
 		return -1;
 	}
 
+	sigchain_push(SIGPIPE, SIG_IGN);
+
 	strbuf_init(&buf, 256);
 
 	for (r = remote_refs; r; r = r->next) {
@@ -1135,11 +937,13 @@ static int run_pre_push_hook(struct transport *transport,
 
 		strbuf_reset(&buf);
 		strbuf_addf( &buf, "%s %s %s %s\n",
-			 r->peer_ref->name, sha1_to_hex(r->new_sha1),
-			 r->name, sha1_to_hex(r->old_sha1));
+			 r->peer_ref->name, oid_to_hex(&r->new_oid),
+			 r->name, oid_to_hex(&r->old_oid));
 
-		if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
-			ret = -1;
+		if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
+			/* We do not mind if a hook does not read all refs. */
+			if (errno != EPIPE)
+				ret = -1;
 			break;
 		}
 	}
@@ -1150,6 +954,8 @@ static int run_pre_push_hook(struct transport *transport,
 	if (!ret)
 		ret = x;
 
+	sigchain_pop(SIGPIPE);
+
 	x = finish_command(&proc);
 	if (!ret)
 		ret = x;
@@ -1213,28 +1019,54 @@ int transport_push(struct transport *transport,
 			if (run_pre_push_hook(transport, remote_refs))
 				return -1;
 
-		if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
+		if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
+			      TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
+		    !is_bare_repository()) {
 			struct ref *ref = remote_refs;
+			struct oid_array commits = OID_ARRAY_INIT;
+
 			for (; ref; ref = ref->next)
-				if (!is_null_sha1(ref->new_sha1) &&
-				    !push_unpushed_submodules(ref->new_sha1,
-					    transport->remote->name))
-				    die ("Failed to push all needed submodules!");
+				if (!is_null_oid(&ref->new_oid))
+					oid_array_append(&commits,
+							  &ref->new_oid);
+
+			if (!push_unpushed_submodules(&commits,
+						      transport->remote,
+						      refspec, refspec_nr,
+						      transport->push_options,
+						      pretend)) {
+				oid_array_clear(&commits);
+				die("Failed to push all needed submodules!");
+			}
+			oid_array_clear(&commits);
 		}
 
-		if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
-			      TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
+		if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
+		     ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
+				TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
+		      !pretend)) && !is_bare_repository()) {
 			struct ref *ref = remote_refs;
 			struct string_list needs_pushing = STRING_LIST_INIT_DUP;
+			struct oid_array commits = OID_ARRAY_INIT;
 
 			for (; ref; ref = ref->next)
-				if (!is_null_sha1(ref->new_sha1) &&
-				    find_unpushed_submodules(ref->new_sha1,
-					    transport->remote->name, &needs_pushing))
-					die_with_unpushed_submodules(&needs_pushing);
+				if (!is_null_oid(&ref->new_oid))
+					oid_array_append(&commits,
+							  &ref->new_oid);
+
+			if (find_unpushed_submodules(&commits, transport->remote->name,
+						&needs_pushing)) {
+				oid_array_clear(&commits);
+				die_with_unpushed_submodules(&needs_pushing);
+			}
+			string_list_clear(&needs_pushing, 0);
+			oid_array_clear(&commits);
 		}
 
-		push_ret = transport->push_refs(transport, remote_refs, flags);
+		if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
+			push_ret = transport->push_refs(transport, remote_refs, flags);
+		else
+			push_ret = 0;
 		err = push_had_errors(remote_refs);
 		ret = push_ret | err;
 
@@ -1246,7 +1078,8 @@ int transport_push(struct transport *transport,
 		if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 			set_upstreams(transport, remote_refs, pretend);
 
-		if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
+		if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
+			       TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
 			struct ref *ref;
 			for (ref = remote_refs; ref; ref = ref->next)
 				transport_update_tracking_ref(transport->remote, ref, verbose);
@@ -1282,8 +1115,8 @@ int transport_fetch_refs(struct transport *transport, struct ref *refs)
 	for (rm = refs; rm; rm = rm->next) {
 		nr_refs++;
 		if (rm->peer_ref &&
-		    !is_null_sha1(rm->old_sha1) &&
-		    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
+		    !is_null_oid(&rm->old_oid) &&
+		    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
 			continue;
 		ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 		heads[nr_heads++] = rm;
@@ -1297,7 +1130,7 @@ int transport_fetch_refs(struct transport *transport, struct ref *refs)
 		 * This condition shouldn't be met in a non-deepening fetch
 		 * (see builtin/fetch.c:quickfetch()).
 		 */
-		heads = xmalloc(nr_refs * sizeof(*heads));
+		ALLOC_ARRAY(heads, nr_refs);
 		for (rm = refs; rm; rm = rm->next)
 			heads[nr_heads++] = rm;
 	}
@@ -1341,7 +1174,7 @@ int transport_disconnect(struct transport *transport)
  */
 char *transport_anonymize_url(const char *url)
 {
-	char *anon_url, *scheme_prefix, *anon_part;
+	char *scheme_prefix, *anon_part;
 	size_t anon_len, prefix_len = 0;
 
 	anon_part = strchr(url, '@');
@@ -1375,14 +1208,48 @@ char *transport_anonymize_url(const char *url)
 			goto literal_copy;
 		prefix_len = scheme_prefix - url + 3;
 	}
-	anon_url = xcalloc(1, 1 + prefix_len + anon_len);
-	memcpy(anon_url, url, prefix_len);
-	memcpy(anon_url + prefix_len, anon_part, anon_len);
-	return anon_url;
+	return xstrfmt("%.*s%.*s", (int)prefix_len, url,
+		       (int)anon_len, anon_part);
 literal_copy:
 	return xstrdup(url);
 }
 
+static void read_alternate_refs(const char *path,
+				alternate_ref_fn *cb,
+				void *data)
+{
+	struct child_process cmd = CHILD_PROCESS_INIT;
+	struct strbuf line = STRBUF_INIT;
+	FILE *fh;
+
+	cmd.git_cmd = 1;
+	argv_array_pushf(&cmd.args, "--git-dir=%s", path);
+	argv_array_push(&cmd.args, "for-each-ref");
+	argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
+	cmd.env = local_repo_env;
+	cmd.out = -1;
+
+	if (start_command(&cmd))
+		return;
+
+	fh = xfdopen(cmd.out, "r");
+	while (strbuf_getline_lf(&line, fh) != EOF) {
+		struct object_id oid;
+
+		if (get_oid_hex(line.buf, &oid) ||
+		    line.buf[GIT_SHA1_HEXSZ] != ' ') {
+			warning("invalid line while parsing alternate refs: %s",
+				line.buf);
+			break;
+		}
+
+		cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
+	}
+
+	fclose(fh);
+	finish_command(&cmd);
+}
+
 struct alternate_refs_data {
 	alternate_ref_fn *fn;
 	void *data;
@@ -1391,36 +1258,26 @@ struct alternate_refs_data {
 static int refs_from_alternate_cb(struct alternate_object_database *e,
 				  void *data)
 {
-	char *other;
-	size_t len;
-	struct remote *remote;
-	struct transport *transport;
-	const struct ref *extra;
+	struct strbuf path = STRBUF_INIT;
+	size_t base_len;
 	struct alternate_refs_data *cb = data;
 
-	e->name[-1] = '\0';
-	other = xstrdup(real_path(e->base));
-	e->name[-1] = '/';
-	len = strlen(other);
-
-	while (other[len-1] == '/')
-		other[--len] = '\0';
-	if (len < 8 || memcmp(other + len - 8, "/objects", 8))
+	if (!strbuf_realpath(&path, e->path, 0))
 		goto out;
+	if (!strbuf_strip_suffix(&path, "/objects"))
+		goto out;
+	base_len = path.len;
+
 	/* Is this a git repository with refs? */
-	memcpy(other + len - 8, "/refs", 6);
-	if (!is_directory(other))
+	strbuf_addstr(&path, "/refs");
+	if (!is_directory(path.buf))
 		goto out;
-	other[len - 8] = '\0';
-	remote = remote_get(other);
-	transport = transport_get(remote, other);
-	for (extra = transport_get_remote_refs(transport);
-	     extra;
-	     extra = extra->next)
-		cb->fn(extra, cb->data);
-	transport_disconnect(transport);
+	strbuf_setlen(&path, base_len);
+
+	read_alternate_refs(path.buf, cb->fn, cb->data);
+
 out:
-	free(other);
+	strbuf_release(&path);
 	return 0;
 }