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ls-remote: use parse-options api
[git.git] / transport.c
blob67f366687c7abf2f6bd9cf31faa6f4ed9e6dc69e
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #include "pkt-line.h"
5 #include "fetch-pack.h"
6 #include "remote.h"
7 #include "connect.h"
8 #include "send-pack.h"
9 #include "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13 #include "branch.h"
14 #include "url.h"
15 #include "submodule.h"
16 #include "string-list.h"
17 #include "sha1-array.h"
18 #include "sigchain.h"
19
20 /* rsync support */
21
22 /*
23 * We copy packed-refs and refs/ into a temporary file, then read the
24 * loose refs recursively (sorting whenever possible), and then inserting
25 * those packed refs that are not yet in the list (not validating, but
26 * assuming that the file is sorted).
27 *
28 * Appears refactoring this from refs.c is too cumbersome.
29 */
30
31 static int str_cmp(const void *a, const void *b)
32 {
33 const char *s1 = a;
34 const char *s2 = b;
35
36 return strcmp(s1, s2);
37 }
38
39 /* path->buf + name_offset is expected to point to "refs/" */
40
41 static int read_loose_refs(struct strbuf *path, int name_offset,
42 struct ref **tail)
43 {
44 DIR *dir = opendir(path->buf);
45 struct dirent *de;
46 struct {
47 char **entries;
48 int nr, alloc;
49 } list;
50 int i, pathlen;
51
52 if (!dir)
53 return -1;
54
55 memset (&list, 0, sizeof(list));
56
57 while ((de = readdir(dir))) {
58 if (is_dot_or_dotdot(de->d_name))
59 continue;
60 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
61 list.entries[list.nr++] = xstrdup(de->d_name);
62 }
63 closedir(dir);
64
65 /* sort the list */
66
67 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
68
69 pathlen = path->len;
70 strbuf_addch(path, '/');
71
72 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
73 strbuf_addstr(path, list.entries[i]);
74 if (read_loose_refs(path, name_offset, tail)) {
75 int fd = open(path->buf, O_RDONLY);
76 char buffer[40];
77 struct ref *next;
78
79 if (fd < 0)
80 continue;
81 next = alloc_ref(path->buf + name_offset);
82 if (read_in_full(fd, buffer, 40) != 40 ||
83 get_oid_hex(buffer, &next->old_oid)) {
84 close(fd);
85 free(next);
86 continue;
87 }
88 close(fd);
89 (*tail)->next = next;
90 *tail = next;
91 }
92 }
93 strbuf_setlen(path, pathlen);
94
95 for (i = 0; i < list.nr; i++)
96 free(list.entries[i]);
97 free(list.entries);
98
99 return 0;
100 }
101
102 /* insert the packed refs for which no loose refs were found */
103
104 static void insert_packed_refs(const char *packed_refs, struct ref **list)
105 {
106 FILE *f = fopen(packed_refs, "r");
107 static char buffer[PATH_MAX];
108
109 if (!f)
110 return;
111
112 for (;;) {
113 int cmp = 0; /* assigned before used */
114 int len;
115
116 if (!fgets(buffer, sizeof(buffer), f)) {
117 fclose(f);
118 return;
119 }
120
121 if (!isxdigit(buffer[0]))
122 continue;
123 len = strlen(buffer);
124 if (len && buffer[len - 1] == '\n')
125 buffer[--len] = '\0';
126 if (len < 41)
127 continue;
128 while ((*list)->next &&
129 (cmp = strcmp(buffer + 41,
130 (*list)->next->name)) > 0)
131 list = &(*list)->next;
132 if (!(*list)->next || cmp < 0) {
133 struct ref *next = alloc_ref(buffer + 41);
134 buffer[40] = '\0';
135 if (get_oid_hex(buffer, &next->old_oid)) {
136 warning ("invalid SHA-1: %s", buffer);
137 free(next);
138 continue;
139 }
140 next->next = (*list)->next;
141 (*list)->next = next;
142 list = &(*list)->next;
143 }
144 }
145 }
146
147 static void set_upstreams(struct transport *transport, struct ref *refs,
148 int pretend)
149 {
150 struct ref *ref;
151 for (ref = refs; ref; ref = ref->next) {
152 const char *localname;
153 const char *tmp;
154 const char *remotename;
155 unsigned char sha[20];
156 int flag = 0;
157 /*
158 * Check suitability for tracking. Must be successful /
159 * already up-to-date ref create/modify (not delete).
160 */
161 if (ref->status != REF_STATUS_OK &&
162 ref->status != REF_STATUS_UPTODATE)
163 continue;
164 if (!ref->peer_ref)
165 continue;
166 if (is_null_oid(&ref->new_oid))
167 continue;
168
169 /* Follow symbolic refs (mainly for HEAD). */
170 localname = ref->peer_ref->name;
171 remotename = ref->name;
172 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
173 sha, &flag);
174 if (tmp && flag & REF_ISSYMREF &&
175 starts_with(tmp, "refs/heads/"))
176 localname = tmp;
177
178 /* Both source and destination must be local branches. */
179 if (!localname || !starts_with(localname, "refs/heads/"))
180 continue;
181 if (!remotename || !starts_with(remotename, "refs/heads/"))
182 continue;
183
184 if (!pretend)
185 install_branch_config(BRANCH_CONFIG_VERBOSE,
186 localname + 11, transport->remote->name,
187 remotename);
188 else
189 printf("Would set upstream of '%s' to '%s' of '%s'\n",
190 localname + 11, remotename + 11,
191 transport->remote->name);
192 }
193 }
194
195 static const char *rsync_url(const char *url)
196 {
197 if (!starts_with(url, "rsync://"))
198 skip_prefix(url, "rsync:", &url);
199 return url;
200 }
201
202 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
203 {
204 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
205 struct ref dummy = {NULL}, *tail = &dummy;
206 struct child_process rsync = CHILD_PROCESS_INIT;
207 const char *args[5];
208 int temp_dir_len;
209
210 if (for_push)
211 return NULL;
212
213 /* copy the refs to the temporary directory */
214
215 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
216 if (!mkdtemp(temp_dir.buf))
217 die_errno ("Could not make temporary directory");
218 temp_dir_len = temp_dir.len;
219
220 strbuf_addstr(&buf, rsync_url(transport->url));
221 strbuf_addstr(&buf, "/refs");
222
223 rsync.argv = args;
224 rsync.stdout_to_stderr = 1;
225 args[0] = "rsync";
226 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
227 args[2] = buf.buf;
228 args[3] = temp_dir.buf;
229 args[4] = NULL;
230
231 if (run_command(&rsync))
232 die ("Could not run rsync to get refs");
233
234 strbuf_reset(&buf);
235 strbuf_addstr(&buf, rsync_url(transport->url));
236 strbuf_addstr(&buf, "/packed-refs");
237
238 args[2] = buf.buf;
239
240 if (run_command(&rsync))
241 die ("Could not run rsync to get refs");
242
243 /* read the copied refs */
244
245 strbuf_addstr(&temp_dir, "/refs");
246 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
247 strbuf_setlen(&temp_dir, temp_dir_len);
248
249 tail = &dummy;
250 strbuf_addstr(&temp_dir, "/packed-refs");
251 insert_packed_refs(temp_dir.buf, &tail);
252 strbuf_setlen(&temp_dir, temp_dir_len);
253
254 if (remove_dir_recursively(&temp_dir, 0))
255 warning ("Error removing temporary directory %s.",
256 temp_dir.buf);
257
258 strbuf_release(&buf);
259 strbuf_release(&temp_dir);
260
261 return dummy.next;
262 }
263
264 static int fetch_objs_via_rsync(struct transport *transport,
265 int nr_objs, struct ref **to_fetch)
266 {
267 struct child_process rsync = CHILD_PROCESS_INIT;
268
269 rsync.stdout_to_stderr = 1;
270 argv_array_push(&rsync.args, "rsync");
271 argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
272 argv_array_push(&rsync.args, "--ignore-existing");
273 argv_array_push(&rsync.args, "--exclude");
274 argv_array_push(&rsync.args, "info");
275 argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
276 argv_array_push(&rsync.args, get_object_directory());
277
278 /* NEEDSWORK: handle one level of alternates */
279 return run_command(&rsync);
280 }
281
282 static int write_one_ref(const char *name, const struct object_id *oid,
283 int flags, void *data)
284 {
285 struct strbuf *buf = data;
286 int len = buf->len;
287
288 /* when called via for_each_ref(), flags is non-zero */
289 if (flags && !starts_with(name, "refs/heads/") &&
290 !starts_with(name, "refs/tags/"))
291 return 0;
292
293 strbuf_addstr(buf, name);
294 if (safe_create_leading_directories(buf->buf) ||
295 write_file_gently(buf->buf, "%s", oid_to_hex(oid)))
296 return error("problems writing temporary file %s: %s",
297 buf->buf, strerror(errno));
298 strbuf_setlen(buf, len);
299 return 0;
300 }
301
302 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
303 int refspec_nr, const char **refspec)
304 {
305 int i;
306
307 for (i = 0; i < refspec_nr; i++) {
308 struct object_id oid;
309 char *ref;
310
311 if (dwim_ref(refspec[i], strlen(refspec[i]), oid.hash, &ref) != 1)
312 return error("Could not get ref %s", refspec[i]);
313
314 if (write_one_ref(ref, &oid, 0, temp_dir)) {
315 free(ref);
316 return -1;
317 }
318 free(ref);
319 }
320 return 0;
321 }
322
323 static int rsync_transport_push(struct transport *transport,
324 int refspec_nr, const char **refspec, int flags)
325 {
326 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
327 int result = 0, i;
328 struct child_process rsync = CHILD_PROCESS_INIT;
329 const char *args[10];
330
331 if (flags & TRANSPORT_PUSH_MIRROR)
332 return error("rsync transport does not support mirror mode");
333
334 /* first push the objects */
335
336 strbuf_addstr(&buf, rsync_url(transport->url));
337 strbuf_addch(&buf, '/');
338
339 rsync.argv = args;
340 rsync.stdout_to_stderr = 1;
341 i = 0;
342 args[i++] = "rsync";
343 args[i++] = "-a";
344 if (flags & TRANSPORT_PUSH_DRY_RUN)
345 args[i++] = "--dry-run";
346 if (transport->verbose > 1)
347 args[i++] = "-v";
348 args[i++] = "--ignore-existing";
349 args[i++] = "--exclude";
350 args[i++] = "info";
351 args[i++] = get_object_directory();
352 args[i++] = buf.buf;
353 args[i++] = NULL;
354
355 if (run_command(&rsync))
356 return error("Could not push objects to %s",
357 rsync_url(transport->url));
358
359 /* copy the refs to the temporary directory; they could be packed. */
360
361 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
362 if (!mkdtemp(temp_dir.buf))
363 die_errno ("Could not make temporary directory");
364 strbuf_addch(&temp_dir, '/');
365
366 if (flags & TRANSPORT_PUSH_ALL) {
367 if (for_each_ref(write_one_ref, &temp_dir))
368 return -1;
369 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
370 return -1;
371
372 i = 2;
373 if (flags & TRANSPORT_PUSH_DRY_RUN)
374 args[i++] = "--dry-run";
375 if (!(flags & TRANSPORT_PUSH_FORCE))
376 args[i++] = "--ignore-existing";
377 args[i++] = temp_dir.buf;
378 args[i++] = rsync_url(transport->url);
379 args[i++] = NULL;
380 if (run_command(&rsync))
381 result = error("Could not push to %s",
382 rsync_url(transport->url));
383
384 if (remove_dir_recursively(&temp_dir, 0))
385 warning ("Could not remove temporary directory %s.",
386 temp_dir.buf);
387
388 strbuf_release(&buf);
389 strbuf_release(&temp_dir);
390
391 return result;
392 }
393
394 struct bundle_transport_data {
395 int fd;
396 struct bundle_header header;
397 };
398
399 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
400 {
401 struct bundle_transport_data *data = transport->data;
402 struct ref *result = NULL;
403 int i;
404
405 if (for_push)
406 return NULL;
407
408 if (data->fd > 0)
409 close(data->fd);
410 data->fd = read_bundle_header(transport->url, &data->header);
411 if (data->fd < 0)
412 die ("Could not read bundle '%s'.", transport->url);
413 for (i = 0; i < data->header.references.nr; i++) {
414 struct ref_list_entry *e = data->header.references.list + i;
415 struct ref *ref = alloc_ref(e->name);
416 hashcpy(ref->old_oid.hash, e->sha1);
417 ref->next = result;
418 result = ref;
419 }
420 return result;
421 }
422
423 static int fetch_refs_from_bundle(struct transport *transport,
424 int nr_heads, struct ref **to_fetch)
425 {
426 struct bundle_transport_data *data = transport->data;
427 return unbundle(&data->header, data->fd,
428 transport->progress ? BUNDLE_VERBOSE : 0);
429 }
430
431 static int close_bundle(struct transport *transport)
432 {
433 struct bundle_transport_data *data = transport->data;
434 if (data->fd > 0)
435 close(data->fd);
436 free(data);
437 return 0;
438 }
439
440 struct git_transport_data {
441 struct git_transport_options options;
442 struct child_process *conn;
443 int fd[2];
444 unsigned got_remote_heads : 1;
445 struct sha1_array extra_have;
446 struct sha1_array shallow;
447 };
448
449 static int set_git_option(struct git_transport_options *opts,
450 const char *name, const char *value)
451 {
452 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
453 opts->uploadpack = value;
454 return 0;
455 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
456 opts->receivepack = value;
457 return 0;
458 } else if (!strcmp(name, TRANS_OPT_THIN)) {
459 opts->thin = !!value;
460 return 0;
461 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
462 opts->followtags = !!value;
463 return 0;
464 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
465 opts->keep = !!value;
466 return 0;
467 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
468 opts->update_shallow = !!value;
469 return 0;
470 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
471 if (!value)
472 opts->depth = 0;
473 else {
474 char *end;
475 opts->depth = strtol(value, &end, 0);
476 if (*end)
477 die("transport: invalid depth option '%s'", value);
478 }
479 return 0;
480 }
481 return 1;
482 }
483
484 static int connect_setup(struct transport *transport, int for_push, int verbose)
485 {
486 struct git_transport_data *data = transport->data;
487
488 if (data->conn)
489 return 0;
490
491 data->conn = git_connect(data->fd, transport->url,
492 for_push ? data->options.receivepack :
493 data->options.uploadpack,
494 verbose ? CONNECT_VERBOSE : 0);
495
496 return 0;
497 }
498
499 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
500 {
501 struct git_transport_data *data = transport->data;
502 struct ref *refs;
503
504 connect_setup(transport, for_push, 0);
505 get_remote_heads(data->fd[0], NULL, 0, &refs,
506 for_push ? REF_NORMAL : 0,
507 &data->extra_have,
508 &data->shallow);
509 data->got_remote_heads = 1;
510
511 return refs;
512 }
513
514 static int fetch_refs_via_pack(struct transport *transport,
515 int nr_heads, struct ref **to_fetch)
516 {
517 struct git_transport_data *data = transport->data;
518 struct ref *refs;
519 char *dest = xstrdup(transport->url);
520 struct fetch_pack_args args;
521 struct ref *refs_tmp = NULL;
522
523 memset(&args, 0, sizeof(args));
524 args.uploadpack = data->options.uploadpack;
525 args.keep_pack = data->options.keep;
526 args.lock_pack = 1;
527 args.use_thin_pack = data->options.thin;
528 args.include_tag = data->options.followtags;
529 args.verbose = (transport->verbose > 1);
530 args.quiet = (transport->verbose < 0);
531 args.no_progress = !transport->progress;
532 args.depth = data->options.depth;
533 args.check_self_contained_and_connected =
534 data->options.check_self_contained_and_connected;
535 args.cloning = transport->cloning;
536 args.update_shallow = data->options.update_shallow;
537
538 if (!data->got_remote_heads) {
539 connect_setup(transport, 0, 0);
540 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
541 NULL, &data->shallow);
542 data->got_remote_heads = 1;
543 }
544
545 refs = fetch_pack(&args, data->fd, data->conn,
546 refs_tmp ? refs_tmp : transport->remote_refs,
547 dest, to_fetch, nr_heads, &data->shallow,
548 &transport->pack_lockfile);
549 close(data->fd[0]);
550 close(data->fd[1]);
551 if (finish_connect(data->conn)) {
552 free_refs(refs);
553 refs = NULL;
554 }
555 data->conn = NULL;
556 data->got_remote_heads = 0;
557 data->options.self_contained_and_connected =
558 args.self_contained_and_connected;
559
560 free_refs(refs_tmp);
561 free_refs(refs);
562 free(dest);
563 return (refs ? 0 : -1);
564 }
565
566 static int push_had_errors(struct ref *ref)
567 {
568 for (; ref; ref = ref->next) {
569 switch (ref->status) {
570 case REF_STATUS_NONE:
571 case REF_STATUS_UPTODATE:
572 case REF_STATUS_OK:
573 break;
574 default:
575 return 1;
576 }
577 }
578 return 0;
579 }
580
581 int transport_refs_pushed(struct ref *ref)
582 {
583 for (; ref; ref = ref->next) {
584 switch(ref->status) {
585 case REF_STATUS_NONE:
586 case REF_STATUS_UPTODATE:
587 break;
588 default:
589 return 1;
590 }
591 }
592 return 0;
593 }
594
595 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
596 {
597 struct refspec rs;
598
599 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
600 return;
601
602 rs.src = ref->name;
603 rs.dst = NULL;
604
605 if (!remote_find_tracking(remote, &rs)) {
606 if (verbose)
607 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
608 if (ref->deletion) {
609 delete_ref(rs.dst, NULL, 0);
610 } else
611 update_ref("update by push", rs.dst,
612 ref->new_oid.hash, NULL, 0, 0);
613 free(rs.dst);
614 }
615 }
616
617 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
618 {
619 if (porcelain) {
620 if (from)
621 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
622 else
623 fprintf(stdout, "%c\t:%s\t", flag, to->name);
624 if (msg)
625 fprintf(stdout, "%s (%s)\n", summary, msg);
626 else
627 fprintf(stdout, "%s\n", summary);
628 } else {
629 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
630 if (from)
631 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
632 else
633 fputs(prettify_refname(to->name), stderr);
634 if (msg) {
635 fputs(" (", stderr);
636 fputs(msg, stderr);
637 fputc(')', stderr);
638 }
639 fputc('\n', stderr);
640 }
641 }
642
643 static const char *status_abbrev(unsigned char sha1[20])
644 {
645 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
646 }
647
648 static void print_ok_ref_status(struct ref *ref, int porcelain)
649 {
650 if (ref->deletion)
651 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
652 else if (is_null_oid(&ref->old_oid))
653 print_ref_status('*',
654 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
655 "[new branch]"),
656 ref, ref->peer_ref, NULL, porcelain);
657 else {
658 struct strbuf quickref = STRBUF_INIT;
659 char type;
660 const char *msg;
661
662 strbuf_addstr(&quickref, status_abbrev(ref->old_oid.hash));
663 if (ref->forced_update) {
664 strbuf_addstr(&quickref, "...");
665 type = '+';
666 msg = "forced update";
667 } else {
668 strbuf_addstr(&quickref, "..");
669 type = ' ';
670 msg = NULL;
671 }
672 strbuf_addstr(&quickref, status_abbrev(ref->new_oid.hash));
673
674 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
675 strbuf_release(&quickref);
676 }
677 }
678
679 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
680 {
681 if (!count)
682 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
683
684 switch(ref->status) {
685 case REF_STATUS_NONE:
686 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
687 break;
688 case REF_STATUS_REJECT_NODELETE:
689 print_ref_status('!', "[rejected]", ref, NULL,
690 "remote does not support deleting refs", porcelain);
691 break;
692 case REF_STATUS_UPTODATE:
693 print_ref_status('=', "[up to date]", ref,
694 ref->peer_ref, NULL, porcelain);
695 break;
696 case REF_STATUS_REJECT_NONFASTFORWARD:
697 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
698 "non-fast-forward", porcelain);
699 break;
700 case REF_STATUS_REJECT_ALREADY_EXISTS:
701 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
702 "already exists", porcelain);
703 break;
704 case REF_STATUS_REJECT_FETCH_FIRST:
705 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
706 "fetch first", porcelain);
707 break;
708 case REF_STATUS_REJECT_NEEDS_FORCE:
709 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
710 "needs force", porcelain);
711 break;
712 case REF_STATUS_REJECT_STALE:
713 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
714 "stale info", porcelain);
715 break;
716 case REF_STATUS_REJECT_SHALLOW:
717 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
718 "new shallow roots not allowed", porcelain);
719 break;
720 case REF_STATUS_REMOTE_REJECT:
721 print_ref_status('!', "[remote rejected]", ref,
722 ref->deletion ? NULL : ref->peer_ref,
723 ref->remote_status, porcelain);
724 break;
725 case REF_STATUS_EXPECTING_REPORT:
726 print_ref_status('!', "[remote failure]", ref,
727 ref->deletion ? NULL : ref->peer_ref,
728 "remote failed to report status", porcelain);
729 break;
730 case REF_STATUS_ATOMIC_PUSH_FAILED:
731 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
732 "atomic push failed", porcelain);
733 break;
734 case REF_STATUS_OK:
735 print_ok_ref_status(ref, porcelain);
736 break;
737 }
738
739 return 1;
740 }
741
742 void transport_print_push_status(const char *dest, struct ref *refs,
743 int verbose, int porcelain, unsigned int *reject_reasons)
744 {
745 struct ref *ref;
746 int n = 0;
747 unsigned char head_sha1[20];
748 char *head;
749
750 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
751
752 if (verbose) {
753 for (ref = refs; ref; ref = ref->next)
754 if (ref->status == REF_STATUS_UPTODATE)
755 n += print_one_push_status(ref, dest, n, porcelain);
756 }
757
758 for (ref = refs; ref; ref = ref->next)
759 if (ref->status == REF_STATUS_OK)
760 n += print_one_push_status(ref, dest, n, porcelain);
761
762 *reject_reasons = 0;
763 for (ref = refs; ref; ref = ref->next) {
764 if (ref->status != REF_STATUS_NONE &&
765 ref->status != REF_STATUS_UPTODATE &&
766 ref->status != REF_STATUS_OK)
767 n += print_one_push_status(ref, dest, n, porcelain);
768 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
769 if (head != NULL && !strcmp(head, ref->name))
770 *reject_reasons |= REJECT_NON_FF_HEAD;
771 else
772 *reject_reasons |= REJECT_NON_FF_OTHER;
773 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
774 *reject_reasons |= REJECT_ALREADY_EXISTS;
775 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
776 *reject_reasons |= REJECT_FETCH_FIRST;
777 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
778 *reject_reasons |= REJECT_NEEDS_FORCE;
779 }
780 }
781 free(head);
782 }
783
784 void transport_verify_remote_names(int nr_heads, const char **heads)
785 {
786 int i;
787
788 for (i = 0; i < nr_heads; i++) {
789 const char *local = heads[i];
790 const char *remote = strrchr(heads[i], ':');
791
792 if (*local == '+')
793 local++;
794
795 /* A matching refspec is okay. */
796 if (remote == local && remote[1] == '\0')
797 continue;
798
799 remote = remote ? (remote + 1) : local;
800 if (check_refname_format(remote,
801 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
802 die("remote part of refspec is not a valid name in %s",
803 heads[i]);
804 }
805 }
806
807 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
808 {
809 struct git_transport_data *data = transport->data;
810 struct send_pack_args args;
811 int ret;
812
813 if (!data->got_remote_heads) {
814 struct ref *tmp_refs;
815 connect_setup(transport, 1, 0);
816
817 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
818 NULL, &data->shallow);
819 data->got_remote_heads = 1;
820 }
821
822 memset(&args, 0, sizeof(args));
823 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
824 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
825 args.use_thin_pack = data->options.thin;
826 args.verbose = (transport->verbose > 0);
827 args.quiet = (transport->verbose < 0);
828 args.progress = transport->progress;
829 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
830 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
831 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
832 args.url = transport->url;
833
834 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
835 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
836 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
837 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
838 else
839 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
840
841 ret = send_pack(&args, data->fd, data->conn, remote_refs,
842 &data->extra_have);
843
844 close(data->fd[1]);
845 close(data->fd[0]);
846 ret |= finish_connect(data->conn);
847 data->conn = NULL;
848 data->got_remote_heads = 0;
849
850 return ret;
851 }
852
853 static int connect_git(struct transport *transport, const char *name,
854 const char *executable, int fd[2])
855 {
856 struct git_transport_data *data = transport->data;
857 data->conn = git_connect(data->fd, transport->url,
858 executable, 0);
859 fd[0] = data->fd[0];
860 fd[1] = data->fd[1];
861 return 0;
862 }
863
864 static int disconnect_git(struct transport *transport)
865 {
866 struct git_transport_data *data = transport->data;
867 if (data->conn) {
868 if (data->got_remote_heads)
869 packet_flush(data->fd[1]);
870 close(data->fd[0]);
871 close(data->fd[1]);
872 finish_connect(data->conn);
873 }
874
875 free(data);
876 return 0;
877 }
878
879 void transport_take_over(struct transport *transport,
880 struct child_process *child)
881 {
882 struct git_transport_data *data;
883
884 if (!transport->smart_options)
885 die("Bug detected: Taking over transport requires non-NULL "
886 "smart_options field.");
887
888 data = xcalloc(1, sizeof(*data));
889 data->options = *transport->smart_options;
890 data->conn = child;
891 data->fd[0] = data->conn->out;
892 data->fd[1] = data->conn->in;
893 data->got_remote_heads = 0;
894 transport->data = data;
895
896 transport->set_option = NULL;
897 transport->get_refs_list = get_refs_via_connect;
898 transport->fetch = fetch_refs_via_pack;
899 transport->push = NULL;
900 transport->push_refs = git_transport_push;
901 transport->disconnect = disconnect_git;
902 transport->smart_options = &(data->options);
903
904 transport->cannot_reuse = 1;
905 }
906
907 static int is_file(const char *url)
908 {
909 struct stat buf;
910 if (stat(url, &buf))
911 return 0;
912 return S_ISREG(buf.st_mode);
913 }
914
915 static int external_specification_len(const char *url)
916 {
917 return strchr(url, ':') - url;
918 }
919
920 static const struct string_list *protocol_whitelist(void)
921 {
922 static int enabled = -1;
923 static struct string_list allowed = STRING_LIST_INIT_DUP;
924
925 if (enabled < 0) {
926 const char *v = getenv("GIT_ALLOW_PROTOCOL");
927 if (v) {
928 string_list_split(&allowed, v, ':', -1);
929 string_list_sort(&allowed);
930 enabled = 1;
931 } else {
932 enabled = 0;
933 }
934 }
935
936 return enabled ? &allowed : NULL;
937 }
938
939 int is_transport_allowed(const char *type)
940 {
941 const struct string_list *allowed = protocol_whitelist();
942 return !allowed || string_list_has_string(allowed, type);
943 }
944
945 void transport_check_allowed(const char *type)
946 {
947 if (!is_transport_allowed(type))
948 die("transport '%s' not allowed", type);
949 }
950
951 int transport_restrict_protocols(void)
952 {
953 return !!protocol_whitelist();
954 }
955
956 struct transport *transport_get(struct remote *remote, const char *url)
957 {
958 const char *helper;
959 struct transport *ret = xcalloc(1, sizeof(*ret));
960
961 ret->progress = isatty(2);
962
963 if (!remote)
964 die("No remote provided to transport_get()");
965
966 ret->got_remote_refs = 0;
967 ret->remote = remote;
968 helper = remote->foreign_vcs;
969
970 if (!url && remote->url)
971 url = remote->url[0];
972 ret->url = url;
973
974 /* maybe it is a foreign URL? */
975 if (url) {
976 const char *p = url;
977
978 while (is_urlschemechar(p == url, *p))
979 p++;
980 if (starts_with(p, "::"))
981 helper = xstrndup(url, p - url);
982 }
983
984 if (helper) {
985 transport_helper_init(ret, helper);
986 } else if (starts_with(url, "rsync:")) {
987 transport_check_allowed("rsync");
988 ret->get_refs_list = get_refs_via_rsync;
989 ret->fetch = fetch_objs_via_rsync;
990 ret->push = rsync_transport_push;
991 ret->smart_options = NULL;
992 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
993 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
994 transport_check_allowed("file");
995 ret->data = data;
996 ret->get_refs_list = get_refs_from_bundle;
997 ret->fetch = fetch_refs_from_bundle;
998 ret->disconnect = close_bundle;
999 ret->smart_options = NULL;
1000 } else if (!is_url(url)
1001 || starts_with(url, "file://")
1002 || starts_with(url, "git://")
1003 || starts_with(url, "ssh://")
1004 || starts_with(url, "git+ssh://")
1005 || starts_with(url, "ssh+git://")) {
1006 /*
1007 * These are builtin smart transports; "allowed" transports
1008 * will be checked individually in git_connect.
1009 */
1010 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1011 ret->data = data;
1012 ret->set_option = NULL;
1013 ret->get_refs_list = get_refs_via_connect;
1014 ret->fetch = fetch_refs_via_pack;
1015 ret->push_refs = git_transport_push;
1016 ret->connect = connect_git;
1017 ret->disconnect = disconnect_git;
1018 ret->smart_options = &(data->options);
1019
1020 data->conn = NULL;
1021 data->got_remote_heads = 0;
1022 } else {
1023 /* Unknown protocol in URL. Pass to external handler. */
1024 int len = external_specification_len(url);
1025 char *handler = xmemdupz(url, len);
1026 transport_helper_init(ret, handler);
1027 }
1028
1029 if (ret->smart_options) {
1030 ret->smart_options->thin = 1;
1031 ret->smart_options->uploadpack = "git-upload-pack";
1032 if (remote->uploadpack)
1033 ret->smart_options->uploadpack = remote->uploadpack;
1034 ret->smart_options->receivepack = "git-receive-pack";
1035 if (remote->receivepack)
1036 ret->smart_options->receivepack = remote->receivepack;
1037 }
1038
1039 return ret;
1040 }
1041
1042 int transport_set_option(struct transport *transport,
1043 const char *name, const char *value)
1044 {
1045 int git_reports = 1, protocol_reports = 1;
1046
1047 if (transport->smart_options)
1048 git_reports = set_git_option(transport->smart_options,
1049 name, value);
1050
1051 if (transport->set_option)
1052 protocol_reports = transport->set_option(transport, name,
1053 value);
1054
1055 /* If either report is 0, report 0 (success). */
1056 if (!git_reports || !protocol_reports)
1057 return 0;
1058 /* If either reports -1 (invalid value), report -1. */
1059 if ((git_reports == -1) || (protocol_reports == -1))
1060 return -1;
1061 /* Otherwise if both report unknown, report unknown. */
1062 return 1;
1063 }
1064
1065 void transport_set_verbosity(struct transport *transport, int verbosity,
1066 int force_progress)
1067 {
1068 if (verbosity >= 1)
1069 transport->verbose = verbosity <= 3 ? verbosity : 3;
1070 if (verbosity < 0)
1071 transport->verbose = -1;
1072
1073 /**
1074 * Rules used to determine whether to report progress (processing aborts
1075 * when a rule is satisfied):
1076 *
1077 * . Report progress, if force_progress is 1 (ie. --progress).
1078 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1079 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1080 * . Report progress if isatty(2) is 1.
1081 **/
1082 if (force_progress >= 0)
1083 transport->progress = !!force_progress;
1084 else
1085 transport->progress = verbosity >= 0 && isatty(2);
1086 }
1087
1088 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1089 {
1090 int i;
1091
1092 fprintf(stderr, "The following submodule paths contain changes that can\n"
1093 "not be found on any remote:\n");
1094 for (i = 0; i < needs_pushing->nr; i++)
1095 printf(" %s\n", needs_pushing->items[i].string);
1096 fprintf(stderr, "\nPlease try\n\n"
1097 " git push --recurse-submodules=on-demand\n\n"
1098 "or cd to the path and use\n\n"
1099 " git push\n\n"
1100 "to push them to a remote.\n\n");
1101
1102 string_list_clear(needs_pushing, 0);
1103
1104 die("Aborting.");
1105 }
1106
1107 static int run_pre_push_hook(struct transport *transport,
1108 struct ref *remote_refs)
1109 {
1110 int ret = 0, x;
1111 struct ref *r;
1112 struct child_process proc = CHILD_PROCESS_INIT;
1113 struct strbuf buf;
1114 const char *argv[4];
1115
1116 if (!(argv[0] = find_hook("pre-push")))
1117 return 0;
1118
1119 argv[1] = transport->remote->name;
1120 argv[2] = transport->url;
1121 argv[3] = NULL;
1122
1123 proc.argv = argv;
1124 proc.in = -1;
1125
1126 if (start_command(&proc)) {
1127 finish_command(&proc);
1128 return -1;
1129 }
1130
1131 sigchain_push(SIGPIPE, SIG_IGN);
1132
1133 strbuf_init(&buf, 256);
1134
1135 for (r = remote_refs; r; r = r->next) {
1136 if (!r->peer_ref) continue;
1137 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1138 if (r->status == REF_STATUS_REJECT_STALE) continue;
1139 if (r->status == REF_STATUS_UPTODATE) continue;
1140
1141 strbuf_reset(&buf);
1142 strbuf_addf( &buf, "%s %s %s %s\n",
1143 r->peer_ref->name, oid_to_hex(&r->new_oid),
1144 r->name, oid_to_hex(&r->old_oid));
1145
1146 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1147 /* We do not mind if a hook does not read all refs. */
1148 if (errno != EPIPE)
1149 ret = -1;
1150 break;
1151 }
1152 }
1153
1154 strbuf_release(&buf);
1155
1156 x = close(proc.in);
1157 if (!ret)
1158 ret = x;
1159
1160 sigchain_pop(SIGPIPE);
1161
1162 x = finish_command(&proc);
1163 if (!ret)
1164 ret = x;
1165
1166 return ret;
1167 }
1168
1169 int transport_push(struct transport *transport,
1170 int refspec_nr, const char **refspec, int flags,
1171 unsigned int *reject_reasons)
1172 {
1173 *reject_reasons = 0;
1174 transport_verify_remote_names(refspec_nr, refspec);
1175
1176 if (transport->push) {
1177 /* Maybe FIXME. But no important transport uses this case. */
1178 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1179 die("This transport does not support using --set-upstream");
1180
1181 return transport->push(transport, refspec_nr, refspec, flags);
1182 } else if (transport->push_refs) {
1183 struct ref *remote_refs;
1184 struct ref *local_refs = get_local_heads();
1185 int match_flags = MATCH_REFS_NONE;
1186 int verbose = (transport->verbose > 0);
1187 int quiet = (transport->verbose < 0);
1188 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1189 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1190 int push_ret, ret, err;
1191
1192 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1193 return -1;
1194
1195 remote_refs = transport->get_refs_list(transport, 1);
1196
1197 if (flags & TRANSPORT_PUSH_ALL)
1198 match_flags |= MATCH_REFS_ALL;
1199 if (flags & TRANSPORT_PUSH_MIRROR)
1200 match_flags |= MATCH_REFS_MIRROR;
1201 if (flags & TRANSPORT_PUSH_PRUNE)
1202 match_flags |= MATCH_REFS_PRUNE;
1203 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1204 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1205
1206 if (match_push_refs(local_refs, &remote_refs,
1207 refspec_nr, refspec, match_flags)) {
1208 return -1;
1209 }
1210
1211 if (transport->smart_options &&
1212 transport->smart_options->cas &&
1213 !is_empty_cas(transport->smart_options->cas))
1214 apply_push_cas(transport->smart_options->cas,
1215 transport->remote, remote_refs);
1216
1217 set_ref_status_for_push(remote_refs,
1218 flags & TRANSPORT_PUSH_MIRROR,
1219 flags & TRANSPORT_PUSH_FORCE);
1220
1221 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1222 if (run_pre_push_hook(transport, remote_refs))
1223 return -1;
1224
1225 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1226 struct ref *ref = remote_refs;
1227 for (; ref; ref = ref->next)
1228 if (!is_null_oid(&ref->new_oid) &&
1229 !push_unpushed_submodules(ref->new_oid.hash,
1230 transport->remote->name))
1231 die ("Failed to push all needed submodules!");
1232 }
1233
1234 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1235 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1236 struct ref *ref = remote_refs;
1237 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1238
1239 for (; ref; ref = ref->next)
1240 if (!is_null_oid(&ref->new_oid) &&
1241 find_unpushed_submodules(ref->new_oid.hash,
1242 transport->remote->name, &needs_pushing))
1243 die_with_unpushed_submodules(&needs_pushing);
1244 }
1245
1246 push_ret = transport->push_refs(transport, remote_refs, flags);
1247 err = push_had_errors(remote_refs);
1248 ret = push_ret | err;
1249
1250 if (!quiet || err)
1251 transport_print_push_status(transport->url, remote_refs,
1252 verbose | porcelain, porcelain,
1253 reject_reasons);
1254
1255 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1256 set_upstreams(transport, remote_refs, pretend);
1257
1258 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1259 struct ref *ref;
1260 for (ref = remote_refs; ref; ref = ref->next)
1261 transport_update_tracking_ref(transport->remote, ref, verbose);
1262 }
1263
1264 if (porcelain && !push_ret)
1265 puts("Done");
1266 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1267 fprintf(stderr, "Everything up-to-date\n");
1268
1269 return ret;
1270 }
1271 return 1;
1272 }
1273
1274 const struct ref *transport_get_remote_refs(struct transport *transport)
1275 {
1276 if (!transport->got_remote_refs) {
1277 transport->remote_refs = transport->get_refs_list(transport, 0);
1278 transport->got_remote_refs = 1;
1279 }
1280
1281 return transport->remote_refs;
1282 }
1283
1284 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1285 {
1286 int rc;
1287 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1288 struct ref **heads = NULL;
1289 struct ref *rm;
1290
1291 for (rm = refs; rm; rm = rm->next) {
1292 nr_refs++;
1293 if (rm->peer_ref &&
1294 !is_null_oid(&rm->old_oid) &&
1295 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1296 continue;
1297 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1298 heads[nr_heads++] = rm;
1299 }
1300
1301 if (!nr_heads) {
1302 /*
1303 * When deepening of a shallow repository is requested,
1304 * then local and remote refs are likely to still be equal.
1305 * Just feed them all to the fetch method in that case.
1306 * This condition shouldn't be met in a non-deepening fetch
1307 * (see builtin/fetch.c:quickfetch()).
1308 */
1309 heads = xmalloc(nr_refs * sizeof(*heads));
1310 for (rm = refs; rm; rm = rm->next)
1311 heads[nr_heads++] = rm;
1312 }
1313
1314 rc = transport->fetch(transport, nr_heads, heads);
1315
1316 free(heads);
1317 return rc;
1318 }
1319
1320 void transport_unlock_pack(struct transport *transport)
1321 {
1322 if (transport->pack_lockfile) {
1323 unlink_or_warn(transport->pack_lockfile);
1324 free(transport->pack_lockfile);
1325 transport->pack_lockfile = NULL;
1326 }
1327 }
1328
1329 int transport_connect(struct transport *transport, const char *name,
1330 const char *exec, int fd[2])
1331 {
1332 if (transport->connect)
1333 return transport->connect(transport, name, exec, fd);
1334 else
1335 die("Operation not supported by protocol");
1336 }
1337
1338 int transport_disconnect(struct transport *transport)
1339 {
1340 int ret = 0;
1341 if (transport->disconnect)
1342 ret = transport->disconnect(transport);
1343 free(transport);
1344 return ret;
1345 }
1346
1347 /*
1348 * Strip username (and password) from a URL and return
1349 * it in a newly allocated string.
1350 */
1351 char *transport_anonymize_url(const char *url)
1352 {
1353 char *anon_url, *scheme_prefix, *anon_part;
1354 size_t anon_len, prefix_len = 0;
1355
1356 anon_part = strchr(url, '@');
1357 if (url_is_local_not_ssh(url) || !anon_part)
1358 goto literal_copy;
1359
1360 anon_len = strlen(++anon_part);
1361 scheme_prefix = strstr(url, "://");
1362 if (!scheme_prefix) {
1363 if (!strchr(anon_part, ':'))
1364 /* cannot be "me@there:/path/name" */
1365 goto literal_copy;
1366 } else {
1367 const char *cp;
1368 /* make sure scheme is reasonable */
1369 for (cp = url; cp < scheme_prefix; cp++) {
1370 switch (*cp) {
1371 /* RFC 1738 2.1 */
1372 case '+': case '.': case '-':
1373 break; /* ok */
1374 default:
1375 if (isalnum(*cp))
1376 break;
1377 /* it isn't */
1378 goto literal_copy;
1379 }
1380 }
1381 /* @ past the first slash does not count */
1382 cp = strchr(scheme_prefix + 3, '/');
1383 if (cp && cp < anon_part)
1384 goto literal_copy;
1385 prefix_len = scheme_prefix - url + 3;
1386 }
1387 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1388 memcpy(anon_url, url, prefix_len);
1389 memcpy(anon_url + prefix_len, anon_part, anon_len);
1390 return anon_url;
1391 literal_copy:
1392 return xstrdup(url);
1393 }
1394
1395 struct alternate_refs_data {
1396 alternate_ref_fn *fn;
1397 void *data;
1398 };
1399
1400 static int refs_from_alternate_cb(struct alternate_object_database *e,
1401 void *data)
1402 {
1403 char *other;
1404 size_t len;
1405 struct remote *remote;
1406 struct transport *transport;
1407 const struct ref *extra;
1408 struct alternate_refs_data *cb = data;
1409
1410 e->name[-1] = '\0';
1411 other = xstrdup(real_path(e->base));
1412 e->name[-1] = '/';
1413 len = strlen(other);
1414
1415 while (other[len-1] == '/')
1416 other[--len] = '\0';
1417 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1418 goto out;
1419 /* Is this a git repository with refs? */
1420 memcpy(other + len - 8, "/refs", 6);
1421 if (!is_directory(other))
1422 goto out;
1423 other[len - 8] = '\0';
1424 remote = remote_get(other);
1425 transport = transport_get(remote, other);
1426 for (extra = transport_get_remote_refs(transport);
1427 extra;
1428 extra = extra->next)
1429 cb->fn(extra, cb->data);
1430 transport_disconnect(transport);
1431 out:
1432 free(other);
1433 return 0;
1434 }
1435
1436 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1437 {
1438 struct alternate_refs_data cb;
1439 cb.fn = fn;
1440 cb.data = data;
1441 foreach_alt_odb(refs_from_alternate_cb, &cb);
1442 }
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