diff: convert diff_flush_patch_id to struct object_id
[gitweb.git] / transport.c
index 37e4f5e42cbe86d69221256ab63af609d02c7d07..9bfcf870f9078f75349bd3b4976c71bbf5c49ebf 100644 (file)
 #include "sha1-array.h"
 #include "sigchain.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;
-               }
-       }
-}
-
 static void set_upstreams(struct transport *transport, struct ref *refs,
        int pretend)
 {
@@ -163,7 +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). */
@@ -186,211 +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 struct object_id *oid,
-                        int flags, void *data)
-{
-       struct strbuf *buf = data;
-       int len = buf->len;
-
-       /* 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) ||
-           write_file_gently(buf->buf, "%s", oid_to_hex(oid)))
-               return error("problems writing temporary file %s: %s",
-                            buf->buf, strerror(errno));
-       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++) {
-               struct object_id oid;
-               char *ref;
-
-               if (dwim_ref(refspec[i], strlen(refspec[i]), oid.hash, &ref) != 1)
-                       return error("Could not get ref %s", refspec[i]);
-
-               if (write_one_ref(ref, &oid, 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;
@@ -413,7 +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;
        }
@@ -442,8 +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,
@@ -474,24 +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_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;
 }
@@ -501,7 +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,
@@ -514,6 +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);
@@ -530,13 +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;
@@ -548,19 +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)
@@ -606,15 +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)
@@ -626,7 +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
@@ -640,130 +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;
@@ -811,7 +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);
@@ -828,6 +560,7 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
+       args.push_options = transport->push_options;
        args.url = transport->url;
 
        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
@@ -881,7 +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));
@@ -935,21 +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)
@@ -983,11 +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");
@@ -1000,8 +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.
@@ -1088,19 +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,
@@ -1139,8 +937,8 @@ 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) < 0) {
                        /* We do not mind if a hook does not read all refs. */
@@ -1221,28 +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;
 
@@ -1254,7 +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);
@@ -1290,8 +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;
@@ -1305,7 +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;
        }
@@ -1349,7 +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, '@');
@@ -1383,14 +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;
@@ -1399,36 +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;
 }