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make the sender advertise shallow commits to the receiver
[git.git] / transport.c
blob12e46ad661a074bc480f8c72481a01ff808aa74c
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
19 /* rsync support */
20
21 /*
22 * We copy packed-refs and refs/ into a temporary file, then read the
23 * loose refs recursively (sorting whenever possible), and then inserting
24 * those packed refs that are not yet in the list (not validating, but
25 * assuming that the file is sorted).
26 *
27 * Appears refactoring this from refs.c is too cumbersome.
28 */
29
30 static int str_cmp(const void *a, const void *b)
31 {
32 const char *s1 = a;
33 const char *s2 = b;
34
35 return strcmp(s1, s2);
36 }
37
38 /* path->buf + name_offset is expected to point to "refs/" */
39
40 static int read_loose_refs(struct strbuf *path, int name_offset,
41 struct ref **tail)
42 {
43 DIR *dir = opendir(path->buf);
44 struct dirent *de;
45 struct {
46 char **entries;
47 int nr, alloc;
48 } list;
49 int i, pathlen;
50
51 if (!dir)
52 return -1;
53
54 memset (&list, 0, sizeof(list));
55
56 while ((de = readdir(dir))) {
57 if (is_dot_or_dotdot(de->d_name))
58 continue;
59 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
60 list.entries[list.nr++] = xstrdup(de->d_name);
61 }
62 closedir(dir);
63
64 /* sort the list */
65
66 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
67
68 pathlen = path->len;
69 strbuf_addch(path, '/');
70
71 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
72 strbuf_addstr(path, list.entries[i]);
73 if (read_loose_refs(path, name_offset, tail)) {
74 int fd = open(path->buf, O_RDONLY);
75 char buffer[40];
76 struct ref *next;
77
78 if (fd < 0)
79 continue;
80 next = alloc_ref(path->buf + name_offset);
81 if (read_in_full(fd, buffer, 40) != 40 ||
82 get_sha1_hex(buffer, next->old_sha1)) {
83 close(fd);
84 free(next);
85 continue;
86 }
87 close(fd);
88 (*tail)->next = next;
89 *tail = next;
90 }
91 }
92 strbuf_setlen(path, pathlen);
93
94 for (i = 0; i < list.nr; i++)
95 free(list.entries[i]);
96 free(list.entries);
97
98 return 0;
99 }
100
101 /* insert the packed refs for which no loose refs were found */
102
103 static void insert_packed_refs(const char *packed_refs, struct ref **list)
104 {
105 FILE *f = fopen(packed_refs, "r");
106 static char buffer[PATH_MAX];
107
108 if (!f)
109 return;
110
111 for (;;) {
112 int cmp = 0; /* assigned before used */
113 int len;
114
115 if (!fgets(buffer, sizeof(buffer), f)) {
116 fclose(f);
117 return;
118 }
119
120 if (hexval(buffer[0]) > 0xf)
121 continue;
122 len = strlen(buffer);
123 if (len && buffer[len - 1] == '\n')
124 buffer[--len] = '\0';
125 if (len < 41)
126 continue;
127 while ((*list)->next &&
128 (cmp = strcmp(buffer + 41,
129 (*list)->next->name)) > 0)
130 list = &(*list)->next;
131 if (!(*list)->next || cmp < 0) {
132 struct ref *next = alloc_ref(buffer + 41);
133 buffer[40] = '\0';
134 if (get_sha1_hex(buffer, next->old_sha1)) {
135 warning ("invalid SHA-1: %s", buffer);
136 free(next);
137 continue;
138 }
139 next->next = (*list)->next;
140 (*list)->next = next;
141 list = &(*list)->next;
142 }
143 }
144 }
145
146 static void set_upstreams(struct transport *transport, struct ref *refs,
147 int pretend)
148 {
149 struct ref *ref;
150 for (ref = refs; ref; ref = ref->next) {
151 const char *localname;
152 const char *tmp;
153 const char *remotename;
154 unsigned char sha[20];
155 int flag = 0;
156 /*
157 * Check suitability for tracking. Must be successful /
158 * already up-to-date ref create/modify (not delete).
159 */
160 if (ref->status != REF_STATUS_OK &&
161 ref->status != REF_STATUS_UPTODATE)
162 continue;
163 if (!ref->peer_ref)
164 continue;
165 if (is_null_sha1(ref->new_sha1))
166 continue;
167
168 /* Follow symbolic refs (mainly for HEAD). */
169 localname = ref->peer_ref->name;
170 remotename = ref->name;
171 tmp = resolve_ref_unsafe(localname, sha, 1, &flag);
172 if (tmp && flag & REF_ISSYMREF &&
173 !prefixcmp(tmp, "refs/heads/"))
174 localname = tmp;
175
176 /* Both source and destination must be local branches. */
177 if (!localname || prefixcmp(localname, "refs/heads/"))
178 continue;
179 if (!remotename || prefixcmp(remotename, "refs/heads/"))
180 continue;
181
182 if (!pretend)
183 install_branch_config(BRANCH_CONFIG_VERBOSE,
184 localname + 11, transport->remote->name,
185 remotename);
186 else
187 printf("Would set upstream of '%s' to '%s' of '%s'\n",
188 localname + 11, remotename + 11,
189 transport->remote->name);
190 }
191 }
192
193 static const char *rsync_url(const char *url)
194 {
195 return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
196 }
197
198 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
199 {
200 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
201 struct ref dummy = {NULL}, *tail = &dummy;
202 struct child_process rsync;
203 const char *args[5];
204 int temp_dir_len;
205
206 if (for_push)
207 return NULL;
208
209 /* copy the refs to the temporary directory */
210
211 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
212 if (!mkdtemp(temp_dir.buf))
213 die_errno ("Could not make temporary directory");
214 temp_dir_len = temp_dir.len;
215
216 strbuf_addstr(&buf, rsync_url(transport->url));
217 strbuf_addstr(&buf, "/refs");
218
219 memset(&rsync, 0, sizeof(rsync));
220 rsync.argv = args;
221 rsync.stdout_to_stderr = 1;
222 args[0] = "rsync";
223 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
224 args[2] = buf.buf;
225 args[3] = temp_dir.buf;
226 args[4] = NULL;
227
228 if (run_command(&rsync))
229 die ("Could not run rsync to get refs");
230
231 strbuf_reset(&buf);
232 strbuf_addstr(&buf, rsync_url(transport->url));
233 strbuf_addstr(&buf, "/packed-refs");
234
235 args[2] = buf.buf;
236
237 if (run_command(&rsync))
238 die ("Could not run rsync to get refs");
239
240 /* read the copied refs */
241
242 strbuf_addstr(&temp_dir, "/refs");
243 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
244 strbuf_setlen(&temp_dir, temp_dir_len);
245
246 tail = &dummy;
247 strbuf_addstr(&temp_dir, "/packed-refs");
248 insert_packed_refs(temp_dir.buf, &tail);
249 strbuf_setlen(&temp_dir, temp_dir_len);
250
251 if (remove_dir_recursively(&temp_dir, 0))
252 warning ("Error removing temporary directory %s.",
253 temp_dir.buf);
254
255 strbuf_release(&buf);
256 strbuf_release(&temp_dir);
257
258 return dummy.next;
259 }
260
261 static int fetch_objs_via_rsync(struct transport *transport,
262 int nr_objs, struct ref **to_fetch)
263 {
264 struct strbuf buf = STRBUF_INIT;
265 struct child_process rsync;
266 const char *args[8];
267 int result;
268
269 strbuf_addstr(&buf, rsync_url(transport->url));
270 strbuf_addstr(&buf, "/objects/");
271
272 memset(&rsync, 0, sizeof(rsync));
273 rsync.argv = args;
274 rsync.stdout_to_stderr = 1;
275 args[0] = "rsync";
276 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
277 args[2] = "--ignore-existing";
278 args[3] = "--exclude";
279 args[4] = "info";
280 args[5] = buf.buf;
281 args[6] = get_object_directory();
282 args[7] = NULL;
283
284 /* NEEDSWORK: handle one level of alternates */
285 result = run_command(&rsync);
286
287 strbuf_release(&buf);
288
289 return result;
290 }
291
292 static int write_one_ref(const char *name, const unsigned char *sha1,
293 int flags, void *data)
294 {
295 struct strbuf *buf = data;
296 int len = buf->len;
297 FILE *f;
298
299 /* when called via for_each_ref(), flags is non-zero */
300 if (flags && prefixcmp(name, "refs/heads/") &&
301 prefixcmp(name, "refs/tags/"))
302 return 0;
303
304 strbuf_addstr(buf, name);
305 if (safe_create_leading_directories(buf->buf) ||
306 !(f = fopen(buf->buf, "w")) ||
307 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
308 fclose(f))
309 return error("problems writing temporary file %s", buf->buf);
310 strbuf_setlen(buf, len);
311 return 0;
312 }
313
314 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
315 int refspec_nr, const char **refspec)
316 {
317 int i;
318
319 for (i = 0; i < refspec_nr; i++) {
320 unsigned char sha1[20];
321 char *ref;
322
323 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
324 return error("Could not get ref %s", refspec[i]);
325
326 if (write_one_ref(ref, sha1, 0, temp_dir)) {
327 free(ref);
328 return -1;
329 }
330 free(ref);
331 }
332 return 0;
333 }
334
335 static int rsync_transport_push(struct transport *transport,
336 int refspec_nr, const char **refspec, int flags)
337 {
338 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
339 int result = 0, i;
340 struct child_process rsync;
341 const char *args[10];
342
343 if (flags & TRANSPORT_PUSH_MIRROR)
344 return error("rsync transport does not support mirror mode");
345
346 /* first push the objects */
347
348 strbuf_addstr(&buf, rsync_url(transport->url));
349 strbuf_addch(&buf, '/');
350
351 memset(&rsync, 0, sizeof(rsync));
352 rsync.argv = args;
353 rsync.stdout_to_stderr = 1;
354 i = 0;
355 args[i++] = "rsync";
356 args[i++] = "-a";
357 if (flags & TRANSPORT_PUSH_DRY_RUN)
358 args[i++] = "--dry-run";
359 if (transport->verbose > 1)
360 args[i++] = "-v";
361 args[i++] = "--ignore-existing";
362 args[i++] = "--exclude";
363 args[i++] = "info";
364 args[i++] = get_object_directory();
365 args[i++] = buf.buf;
366 args[i++] = NULL;
367
368 if (run_command(&rsync))
369 return error("Could not push objects to %s",
370 rsync_url(transport->url));
371
372 /* copy the refs to the temporary directory; they could be packed. */
373
374 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
375 if (!mkdtemp(temp_dir.buf))
376 die_errno ("Could not make temporary directory");
377 strbuf_addch(&temp_dir, '/');
378
379 if (flags & TRANSPORT_PUSH_ALL) {
380 if (for_each_ref(write_one_ref, &temp_dir))
381 return -1;
382 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
383 return -1;
384
385 i = 2;
386 if (flags & TRANSPORT_PUSH_DRY_RUN)
387 args[i++] = "--dry-run";
388 if (!(flags & TRANSPORT_PUSH_FORCE))
389 args[i++] = "--ignore-existing";
390 args[i++] = temp_dir.buf;
391 args[i++] = rsync_url(transport->url);
392 args[i++] = NULL;
393 if (run_command(&rsync))
394 result = error("Could not push to %s",
395 rsync_url(transport->url));
396
397 if (remove_dir_recursively(&temp_dir, 0))
398 warning ("Could not remove temporary directory %s.",
399 temp_dir.buf);
400
401 strbuf_release(&buf);
402 strbuf_release(&temp_dir);
403
404 return result;
405 }
406
407 struct bundle_transport_data {
408 int fd;
409 struct bundle_header header;
410 };
411
412 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
413 {
414 struct bundle_transport_data *data = transport->data;
415 struct ref *result = NULL;
416 int i;
417
418 if (for_push)
419 return NULL;
420
421 if (data->fd > 0)
422 close(data->fd);
423 data->fd = read_bundle_header(transport->url, &data->header);
424 if (data->fd < 0)
425 die ("Could not read bundle '%s'.", transport->url);
426 for (i = 0; i < data->header.references.nr; i++) {
427 struct ref_list_entry *e = data->header.references.list + i;
428 struct ref *ref = alloc_ref(e->name);
429 hashcpy(ref->old_sha1, e->sha1);
430 ref->next = result;
431 result = ref;
432 }
433 return result;
434 }
435
436 static int fetch_refs_from_bundle(struct transport *transport,
437 int nr_heads, struct ref **to_fetch)
438 {
439 struct bundle_transport_data *data = transport->data;
440 return unbundle(&data->header, data->fd,
441 transport->progress ? BUNDLE_VERBOSE : 0);
442 }
443
444 static int close_bundle(struct transport *transport)
445 {
446 struct bundle_transport_data *data = transport->data;
447 if (data->fd > 0)
448 close(data->fd);
449 free(data);
450 return 0;
451 }
452
453 struct git_transport_data {
454 struct git_transport_options options;
455 struct child_process *conn;
456 int fd[2];
457 unsigned got_remote_heads : 1;
458 struct sha1_array extra_have;
459 };
460
461 static int set_git_option(struct git_transport_options *opts,
462 const char *name, const char *value)
463 {
464 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
465 opts->uploadpack = value;
466 return 0;
467 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
468 opts->receivepack = value;
469 return 0;
470 } else if (!strcmp(name, TRANS_OPT_THIN)) {
471 opts->thin = !!value;
472 return 0;
473 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
474 opts->followtags = !!value;
475 return 0;
476 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
477 opts->keep = !!value;
478 return 0;
479 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
480 if (!value)
481 opts->depth = 0;
482 else {
483 char *end;
484 opts->depth = strtol(value, &end, 0);
485 if (*end)
486 die("transport: invalid depth option '%s'", value);
487 }
488 return 0;
489 }
490 return 1;
491 }
492
493 static int connect_setup(struct transport *transport, int for_push, int verbose)
494 {
495 struct git_transport_data *data = transport->data;
496
497 if (data->conn)
498 return 0;
499
500 data->conn = git_connect(data->fd, transport->url,
501 for_push ? data->options.receivepack :
502 data->options.uploadpack,
503 verbose ? CONNECT_VERBOSE : 0);
504
505 return 0;
506 }
507
508 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
509 {
510 struct git_transport_data *data = transport->data;
511 struct ref *refs;
512
513 connect_setup(transport, for_push, 0);
514 get_remote_heads(data->fd[0], NULL, 0, &refs,
515 for_push ? REF_NORMAL : 0, &data->extra_have);
516 data->got_remote_heads = 1;
517
518 return refs;
519 }
520
521 static int fetch_refs_via_pack(struct transport *transport,
522 int nr_heads, struct ref **to_fetch)
523 {
524 struct git_transport_data *data = transport->data;
525 const struct ref *refs;
526 char *dest = xstrdup(transport->url);
527 struct fetch_pack_args args;
528 struct ref *refs_tmp = NULL;
529
530 memset(&args, 0, sizeof(args));
531 args.uploadpack = data->options.uploadpack;
532 args.keep_pack = data->options.keep;
533 args.lock_pack = 1;
534 args.use_thin_pack = data->options.thin;
535 args.include_tag = data->options.followtags;
536 args.verbose = (transport->verbose > 1);
537 args.quiet = (transport->verbose < 0);
538 args.no_progress = !transport->progress;
539 args.depth = data->options.depth;
540 args.check_self_contained_and_connected =
541 data->options.check_self_contained_and_connected;
542
543 if (!data->got_remote_heads) {
544 connect_setup(transport, 0, 0);
545 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0, NULL);
546 data->got_remote_heads = 1;
547 }
548
549 refs = fetch_pack(&args, data->fd, data->conn,
550 refs_tmp ? refs_tmp : transport->remote_refs,
551 dest, to_fetch, nr_heads,
552 &transport->pack_lockfile);
553 close(data->fd[0]);
554 close(data->fd[1]);
555 if (finish_connect(data->conn))
556 refs = NULL;
557 data->conn = NULL;
558 data->got_remote_heads = 0;
559 data->options.self_contained_and_connected =
560 args.self_contained_and_connected;
561
562 free_refs(refs_tmp);
563
564 free(dest);
565 return (refs ? 0 : -1);
566 }
567
568 static int push_had_errors(struct ref *ref)
569 {
570 for (; ref; ref = ref->next) {
571 switch (ref->status) {
572 case REF_STATUS_NONE:
573 case REF_STATUS_UPTODATE:
574 case REF_STATUS_OK:
575 break;
576 default:
577 return 1;
578 }
579 }
580 return 0;
581 }
582
583 int transport_refs_pushed(struct ref *ref)
584 {
585 for (; ref; ref = ref->next) {
586 switch(ref->status) {
587 case REF_STATUS_NONE:
588 case REF_STATUS_UPTODATE:
589 break;
590 default:
591 return 1;
592 }
593 }
594 return 0;
595 }
596
597 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
598 {
599 struct refspec rs;
600
601 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
602 return;
603
604 rs.src = ref->name;
605 rs.dst = NULL;
606
607 if (!remote_find_tracking(remote, &rs)) {
608 if (verbose)
609 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
610 if (ref->deletion) {
611 delete_ref(rs.dst, NULL, 0);
612 } else
613 update_ref("update by push", rs.dst,
614 ref->new_sha1, NULL, 0, 0);
615 free(rs.dst);
616 }
617 }
618
619 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
620 {
621 if (porcelain) {
622 if (from)
623 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
624 else
625 fprintf(stdout, "%c\t:%s\t", flag, to->name);
626 if (msg)
627 fprintf(stdout, "%s (%s)\n", summary, msg);
628 else
629 fprintf(stdout, "%s\n", summary);
630 } else {
631 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
632 if (from)
633 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
634 else
635 fputs(prettify_refname(to->name), stderr);
636 if (msg) {
637 fputs(" (", stderr);
638 fputs(msg, stderr);
639 fputc(')', stderr);
640 }
641 fputc('\n', stderr);
642 }
643 }
644
645 static const char *status_abbrev(unsigned char sha1[20])
646 {
647 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
648 }
649
650 static void print_ok_ref_status(struct ref *ref, int porcelain)
651 {
652 if (ref->deletion)
653 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
654 else if (is_null_sha1(ref->old_sha1))
655 print_ref_status('*',
656 (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
657 "[new branch]"),
658 ref, ref->peer_ref, NULL, porcelain);
659 else {
660 char quickref[84];
661 char type;
662 const char *msg;
663
664 strcpy(quickref, status_abbrev(ref->old_sha1));
665 if (ref->forced_update) {
666 strcat(quickref, "...");
667 type = '+';
668 msg = "forced update";
669 } else {
670 strcat(quickref, "..");
671 type = ' ';
672 msg = NULL;
673 }
674 strcat(quickref, status_abbrev(ref->new_sha1));
675
676 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
677 }
678 }
679
680 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
681 {
682 if (!count)
683 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
684
685 switch(ref->status) {
686 case REF_STATUS_NONE:
687 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
688 break;
689 case REF_STATUS_REJECT_NODELETE:
690 print_ref_status('!', "[rejected]", ref, NULL,
691 "remote does not support deleting refs", porcelain);
692 break;
693 case REF_STATUS_UPTODATE:
694 print_ref_status('=', "[up to date]", ref,
695 ref->peer_ref, NULL, porcelain);
696 break;
697 case REF_STATUS_REJECT_NONFASTFORWARD:
698 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
699 "non-fast-forward", porcelain);
700 break;
701 case REF_STATUS_REJECT_ALREADY_EXISTS:
702 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
703 "already exists", porcelain);
704 break;
705 case REF_STATUS_REJECT_FETCH_FIRST:
706 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
707 "fetch first", porcelain);
708 break;
709 case REF_STATUS_REJECT_NEEDS_FORCE:
710 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
711 "needs force", porcelain);
712 break;
713 case REF_STATUS_REJECT_STALE:
714 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
715 "stale info", porcelain);
716 break;
717 case REF_STATUS_REMOTE_REJECT:
718 print_ref_status('!', "[remote rejected]", ref,
719 ref->deletion ? NULL : ref->peer_ref,
720 ref->remote_status, porcelain);
721 break;
722 case REF_STATUS_EXPECTING_REPORT:
723 print_ref_status('!', "[remote failure]", ref,
724 ref->deletion ? NULL : ref->peer_ref,
725 "remote failed to report status", porcelain);
726 break;
727 case REF_STATUS_OK:
728 print_ok_ref_status(ref, porcelain);
729 break;
730 }
731
732 return 1;
733 }
734
735 void transport_print_push_status(const char *dest, struct ref *refs,
736 int verbose, int porcelain, unsigned int *reject_reasons)
737 {
738 struct ref *ref;
739 int n = 0;
740 unsigned char head_sha1[20];
741 char *head;
742
743 head = resolve_refdup("HEAD", head_sha1, 1, NULL);
744
745 if (verbose) {
746 for (ref = refs; ref; ref = ref->next)
747 if (ref->status == REF_STATUS_UPTODATE)
748 n += print_one_push_status(ref, dest, n, porcelain);
749 }
750
751 for (ref = refs; ref; ref = ref->next)
752 if (ref->status == REF_STATUS_OK)
753 n += print_one_push_status(ref, dest, n, porcelain);
754
755 *reject_reasons = 0;
756 for (ref = refs; ref; ref = ref->next) {
757 if (ref->status != REF_STATUS_NONE &&
758 ref->status != REF_STATUS_UPTODATE &&
759 ref->status != REF_STATUS_OK)
760 n += print_one_push_status(ref, dest, n, porcelain);
761 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
762 if (head != NULL && !strcmp(head, ref->name))
763 *reject_reasons |= REJECT_NON_FF_HEAD;
764 else
765 *reject_reasons |= REJECT_NON_FF_OTHER;
766 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
767 *reject_reasons |= REJECT_ALREADY_EXISTS;
768 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
769 *reject_reasons |= REJECT_FETCH_FIRST;
770 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
771 *reject_reasons |= REJECT_NEEDS_FORCE;
772 }
773 }
774 }
775
776 void transport_verify_remote_names(int nr_heads, const char **heads)
777 {
778 int i;
779
780 for (i = 0; i < nr_heads; i++) {
781 const char *local = heads[i];
782 const char *remote = strrchr(heads[i], ':');
783
784 if (*local == '+')
785 local++;
786
787 /* A matching refspec is okay. */
788 if (remote == local && remote[1] == '\0')
789 continue;
790
791 remote = remote ? (remote + 1) : local;
792 if (check_refname_format(remote,
793 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
794 die("remote part of refspec is not a valid name in %s",
795 heads[i]);
796 }
797 }
798
799 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
800 {
801 struct git_transport_data *data = transport->data;
802 struct send_pack_args args;
803 int ret;
804
805 if (!data->got_remote_heads) {
806 struct ref *tmp_refs;
807 connect_setup(transport, 1, 0);
808
809 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL, NULL);
810 data->got_remote_heads = 1;
811 }
812
813 memset(&args, 0, sizeof(args));
814 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
815 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
816 args.use_thin_pack = data->options.thin;
817 args.verbose = (transport->verbose > 0);
818 args.quiet = (transport->verbose < 0);
819 args.progress = transport->progress;
820 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
821 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
822
823 ret = send_pack(&args, data->fd, data->conn, remote_refs,
824 &data->extra_have);
825
826 close(data->fd[1]);
827 close(data->fd[0]);
828 ret |= finish_connect(data->conn);
829 data->conn = NULL;
830 data->got_remote_heads = 0;
831
832 return ret;
833 }
834
835 static int connect_git(struct transport *transport, const char *name,
836 const char *executable, int fd[2])
837 {
838 struct git_transport_data *data = transport->data;
839 data->conn = git_connect(data->fd, transport->url,
840 executable, 0);
841 fd[0] = data->fd[0];
842 fd[1] = data->fd[1];
843 return 0;
844 }
845
846 static int disconnect_git(struct transport *transport)
847 {
848 struct git_transport_data *data = transport->data;
849 if (data->conn) {
850 if (data->got_remote_heads)
851 packet_flush(data->fd[1]);
852 close(data->fd[0]);
853 close(data->fd[1]);
854 finish_connect(data->conn);
855 }
856
857 free(data);
858 return 0;
859 }
860
861 void transport_take_over(struct transport *transport,
862 struct child_process *child)
863 {
864 struct git_transport_data *data;
865
866 if (!transport->smart_options)
867 die("Bug detected: Taking over transport requires non-NULL "
868 "smart_options field.");
869
870 data = xcalloc(1, sizeof(*data));
871 data->options = *transport->smart_options;
872 data->conn = child;
873 data->fd[0] = data->conn->out;
874 data->fd[1] = data->conn->in;
875 data->got_remote_heads = 0;
876 transport->data = data;
877
878 transport->set_option = NULL;
879 transport->get_refs_list = get_refs_via_connect;
880 transport->fetch = fetch_refs_via_pack;
881 transport->push = NULL;
882 transport->push_refs = git_transport_push;
883 transport->disconnect = disconnect_git;
884 transport->smart_options = &(data->options);
885
886 transport->cannot_reuse = 1;
887 }
888
889 static int is_local(const char *url)
890 {
891 const char *colon = strchr(url, ':');
892 const char *slash = strchr(url, '/');
893 return !colon || (slash && slash < colon) ||
894 has_dos_drive_prefix(url);
895 }
896
897 static int is_file(const char *url)
898 {
899 struct stat buf;
900 if (stat(url, &buf))
901 return 0;
902 return S_ISREG(buf.st_mode);
903 }
904
905 static int external_specification_len(const char *url)
906 {
907 return strchr(url, ':') - url;
908 }
909
910 struct transport *transport_get(struct remote *remote, const char *url)
911 {
912 const char *helper;
913 struct transport *ret = xcalloc(1, sizeof(*ret));
914
915 ret->progress = isatty(2);
916
917 if (!remote)
918 die("No remote provided to transport_get()");
919
920 ret->got_remote_refs = 0;
921 ret->remote = remote;
922 helper = remote->foreign_vcs;
923
924 if (!url && remote->url)
925 url = remote->url[0];
926 ret->url = url;
927
928 /* maybe it is a foreign URL? */
929 if (url) {
930 const char *p = url;
931
932 while (is_urlschemechar(p == url, *p))
933 p++;
934 if (!prefixcmp(p, "::"))
935 helper = xstrndup(url, p - url);
936 }
937
938 if (helper) {
939 transport_helper_init(ret, helper);
940 } else if (!prefixcmp(url, "rsync:")) {
941 ret->get_refs_list = get_refs_via_rsync;
942 ret->fetch = fetch_objs_via_rsync;
943 ret->push = rsync_transport_push;
944 ret->smart_options = NULL;
945 } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
946 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
947 ret->data = data;
948 ret->get_refs_list = get_refs_from_bundle;
949 ret->fetch = fetch_refs_from_bundle;
950 ret->disconnect = close_bundle;
951 ret->smart_options = NULL;
952 } else if (!is_url(url)
953 || !prefixcmp(url, "file://")
954 || !prefixcmp(url, "git://")
955 || !prefixcmp(url, "ssh://")
956 || !prefixcmp(url, "git+ssh://")
957 || !prefixcmp(url, "ssh+git://")) {
958 /* These are builtin smart transports. */
959 struct git_transport_data *data = xcalloc(1, sizeof(*data));
960 ret->data = data;
961 ret->set_option = NULL;
962 ret->get_refs_list = get_refs_via_connect;
963 ret->fetch = fetch_refs_via_pack;
964 ret->push_refs = git_transport_push;
965 ret->connect = connect_git;
966 ret->disconnect = disconnect_git;
967 ret->smart_options = &(data->options);
968
969 data->conn = NULL;
970 data->got_remote_heads = 0;
971 } else {
972 /* Unknown protocol in URL. Pass to external handler. */
973 int len = external_specification_len(url);
974 char *handler = xmalloc(len + 1);
975 handler[len] = 0;
976 strncpy(handler, url, len);
977 transport_helper_init(ret, handler);
978 }
979
980 if (ret->smart_options) {
981 ret->smart_options->thin = 1;
982 ret->smart_options->uploadpack = "git-upload-pack";
983 if (remote->uploadpack)
984 ret->smart_options->uploadpack = remote->uploadpack;
985 ret->smart_options->receivepack = "git-receive-pack";
986 if (remote->receivepack)
987 ret->smart_options->receivepack = remote->receivepack;
988 }
989
990 return ret;
991 }
992
993 int transport_set_option(struct transport *transport,
994 const char *name, const char *value)
995 {
996 int git_reports = 1, protocol_reports = 1;
997
998 if (transport->smart_options)
999 git_reports = set_git_option(transport->smart_options,
1000 name, value);
1001
1002 if (transport->set_option)
1003 protocol_reports = transport->set_option(transport, name,
1004 value);
1005
1006 /* If either report is 0, report 0 (success). */
1007 if (!git_reports || !protocol_reports)
1008 return 0;
1009 /* If either reports -1 (invalid value), report -1. */
1010 if ((git_reports == -1) || (protocol_reports == -1))
1011 return -1;
1012 /* Otherwise if both report unknown, report unknown. */
1013 return 1;
1014 }
1015
1016 void transport_set_verbosity(struct transport *transport, int verbosity,
1017 int force_progress)
1018 {
1019 if (verbosity >= 1)
1020 transport->verbose = verbosity <= 3 ? verbosity : 3;
1021 if (verbosity < 0)
1022 transport->verbose = -1;
1023
1024 /**
1025 * Rules used to determine whether to report progress (processing aborts
1026 * when a rule is satisfied):
1027 *
1028 * . Report progress, if force_progress is 1 (ie. --progress).
1029 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1030 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1031 * . Report progress if isatty(2) is 1.
1032 **/
1033 if (force_progress >= 0)
1034 transport->progress = !!force_progress;
1035 else
1036 transport->progress = verbosity >= 0 && isatty(2);
1037 }
1038
1039 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1040 {
1041 int i;
1042
1043 fprintf(stderr, "The following submodule paths contain changes that can\n"
1044 "not be found on any remote:\n");
1045 for (i = 0; i < needs_pushing->nr; i++)
1046 printf(" %s\n", needs_pushing->items[i].string);
1047 fprintf(stderr, "\nPlease try\n\n"
1048 " git push --recurse-submodules=on-demand\n\n"
1049 "or cd to the path and use\n\n"
1050 " git push\n\n"
1051 "to push them to a remote.\n\n");
1052
1053 string_list_clear(needs_pushing, 0);
1054
1055 die("Aborting.");
1056 }
1057
1058 static int run_pre_push_hook(struct transport *transport,
1059 struct ref *remote_refs)
1060 {
1061 int ret = 0, x;
1062 struct ref *r;
1063 struct child_process proc;
1064 struct strbuf buf;
1065 const char *argv[4];
1066
1067 if (!(argv[0] = find_hook("pre-push")))
1068 return 0;
1069
1070 argv[1] = transport->remote->name;
1071 argv[2] = transport->url;
1072 argv[3] = NULL;
1073
1074 memset(&proc, 0, sizeof(proc));
1075 proc.argv = argv;
1076 proc.in = -1;
1077
1078 if (start_command(&proc)) {
1079 finish_command(&proc);
1080 return -1;
1081 }
1082
1083 strbuf_init(&buf, 256);
1084
1085 for (r = remote_refs; r; r = r->next) {
1086 if (!r->peer_ref) continue;
1087 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1088 if (r->status == REF_STATUS_REJECT_STALE) continue;
1089 if (r->status == REF_STATUS_UPTODATE) continue;
1090
1091 strbuf_reset(&buf);
1092 strbuf_addf( &buf, "%s %s %s %s\n",
1093 r->peer_ref->name, sha1_to_hex(r->new_sha1),
1094 r->name, sha1_to_hex(r->old_sha1));
1095
1096 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1097 ret = -1;
1098 break;
1099 }
1100 }
1101
1102 strbuf_release(&buf);
1103
1104 x = close(proc.in);
1105 if (!ret)
1106 ret = x;
1107
1108 x = finish_command(&proc);
1109 if (!ret)
1110 ret = x;
1111
1112 return ret;
1113 }
1114
1115 int transport_push(struct transport *transport,
1116 int refspec_nr, const char **refspec, int flags,
1117 unsigned int *reject_reasons)
1118 {
1119 *reject_reasons = 0;
1120 transport_verify_remote_names(refspec_nr, refspec);
1121
1122 if (transport->push) {
1123 /* Maybe FIXME. But no important transport uses this case. */
1124 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1125 die("This transport does not support using --set-upstream");
1126
1127 return transport->push(transport, refspec_nr, refspec, flags);
1128 } else if (transport->push_refs) {
1129 struct ref *remote_refs =
1130 transport->get_refs_list(transport, 1);
1131 struct ref *local_refs = get_local_heads();
1132 int match_flags = MATCH_REFS_NONE;
1133 int verbose = (transport->verbose > 0);
1134 int quiet = (transport->verbose < 0);
1135 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1136 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1137 int push_ret, ret, err;
1138
1139 if (flags & TRANSPORT_PUSH_ALL)
1140 match_flags |= MATCH_REFS_ALL;
1141 if (flags & TRANSPORT_PUSH_MIRROR)
1142 match_flags |= MATCH_REFS_MIRROR;
1143 if (flags & TRANSPORT_PUSH_PRUNE)
1144 match_flags |= MATCH_REFS_PRUNE;
1145 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1146 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1147
1148 if (match_push_refs(local_refs, &remote_refs,
1149 refspec_nr, refspec, match_flags)) {
1150 return -1;
1151 }
1152
1153 if (transport->smart_options &&
1154 transport->smart_options->cas &&
1155 !is_empty_cas(transport->smart_options->cas))
1156 apply_push_cas(transport->smart_options->cas,
1157 transport->remote, remote_refs);
1158
1159 set_ref_status_for_push(remote_refs,
1160 flags & TRANSPORT_PUSH_MIRROR,
1161 flags & TRANSPORT_PUSH_FORCE);
1162
1163 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1164 if (run_pre_push_hook(transport, remote_refs))
1165 return -1;
1166
1167 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1168 struct ref *ref = remote_refs;
1169 for (; ref; ref = ref->next)
1170 if (!is_null_sha1(ref->new_sha1) &&
1171 !push_unpushed_submodules(ref->new_sha1,
1172 transport->remote->name))
1173 die ("Failed to push all needed submodules!");
1174 }
1175
1176 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1177 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1178 struct ref *ref = remote_refs;
1179 struct string_list needs_pushing;
1180
1181 memset(&needs_pushing, 0, sizeof(struct string_list));
1182 needs_pushing.strdup_strings = 1;
1183 for (; ref; ref = ref->next)
1184 if (!is_null_sha1(ref->new_sha1) &&
1185 find_unpushed_submodules(ref->new_sha1,
1186 transport->remote->name, &needs_pushing))
1187 die_with_unpushed_submodules(&needs_pushing);
1188 }
1189
1190 push_ret = transport->push_refs(transport, remote_refs, flags);
1191 err = push_had_errors(remote_refs);
1192 ret = push_ret | err;
1193
1194 if (!quiet || err)
1195 transport_print_push_status(transport->url, remote_refs,
1196 verbose | porcelain, porcelain,
1197 reject_reasons);
1198
1199 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1200 set_upstreams(transport, remote_refs, pretend);
1201
1202 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1203 struct ref *ref;
1204 for (ref = remote_refs; ref; ref = ref->next)
1205 transport_update_tracking_ref(transport->remote, ref, verbose);
1206 }
1207
1208 if (porcelain && !push_ret)
1209 puts("Done");
1210 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1211 fprintf(stderr, "Everything up-to-date\n");
1212
1213 return ret;
1214 }
1215 return 1;
1216 }
1217
1218 const struct ref *transport_get_remote_refs(struct transport *transport)
1219 {
1220 if (!transport->got_remote_refs) {
1221 transport->remote_refs = transport->get_refs_list(transport, 0);
1222 transport->got_remote_refs = 1;
1223 }
1224
1225 return transport->remote_refs;
1226 }
1227
1228 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1229 {
1230 int rc;
1231 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1232 struct ref **heads = NULL;
1233 struct ref *rm;
1234
1235 for (rm = refs; rm; rm = rm->next) {
1236 nr_refs++;
1237 if (rm->peer_ref &&
1238 !is_null_sha1(rm->old_sha1) &&
1239 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1240 continue;
1241 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1242 heads[nr_heads++] = rm;
1243 }
1244
1245 if (!nr_heads) {
1246 /*
1247 * When deepening of a shallow repository is requested,
1248 * then local and remote refs are likely to still be equal.
1249 * Just feed them all to the fetch method in that case.
1250 * This condition shouldn't be met in a non-deepening fetch
1251 * (see builtin/fetch.c:quickfetch()).
1252 */
1253 heads = xmalloc(nr_refs * sizeof(*heads));
1254 for (rm = refs; rm; rm = rm->next)
1255 heads[nr_heads++] = rm;
1256 }
1257
1258 rc = transport->fetch(transport, nr_heads, heads);
1259
1260 free(heads);
1261 return rc;
1262 }
1263
1264 void transport_unlock_pack(struct transport *transport)
1265 {
1266 if (transport->pack_lockfile) {
1267 unlink_or_warn(transport->pack_lockfile);
1268 free(transport->pack_lockfile);
1269 transport->pack_lockfile = NULL;
1270 }
1271 }
1272
1273 int transport_connect(struct transport *transport, const char *name,
1274 const char *exec, int fd[2])
1275 {
1276 if (transport->connect)
1277 return transport->connect(transport, name, exec, fd);
1278 else
1279 die("Operation not supported by protocol");
1280 }
1281
1282 int transport_disconnect(struct transport *transport)
1283 {
1284 int ret = 0;
1285 if (transport->disconnect)
1286 ret = transport->disconnect(transport);
1287 free(transport);
1288 return ret;
1289 }
1290
1291 /*
1292 * Strip username (and password) from a URL and return
1293 * it in a newly allocated string.
1294 */
1295 char *transport_anonymize_url(const char *url)
1296 {
1297 char *anon_url, *scheme_prefix, *anon_part;
1298 size_t anon_len, prefix_len = 0;
1299
1300 anon_part = strchr(url, '@');
1301 if (is_local(url) || !anon_part)
1302 goto literal_copy;
1303
1304 anon_len = strlen(++anon_part);
1305 scheme_prefix = strstr(url, "://");
1306 if (!scheme_prefix) {
1307 if (!strchr(anon_part, ':'))
1308 /* cannot be "me@there:/path/name" */
1309 goto literal_copy;
1310 } else {
1311 const char *cp;
1312 /* make sure scheme is reasonable */
1313 for (cp = url; cp < scheme_prefix; cp++) {
1314 switch (*cp) {
1315 /* RFC 1738 2.1 */
1316 case '+': case '.': case '-':
1317 break; /* ok */
1318 default:
1319 if (isalnum(*cp))
1320 break;
1321 /* it isn't */
1322 goto literal_copy;
1323 }
1324 }
1325 /* @ past the first slash does not count */
1326 cp = strchr(scheme_prefix + 3, '/');
1327 if (cp && cp < anon_part)
1328 goto literal_copy;
1329 prefix_len = scheme_prefix - url + 3;
1330 }
1331 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1332 memcpy(anon_url, url, prefix_len);
1333 memcpy(anon_url + prefix_len, anon_part, anon_len);
1334 return anon_url;
1335 literal_copy:
1336 return xstrdup(url);
1337 }
1338
1339 struct alternate_refs_data {
1340 alternate_ref_fn *fn;
1341 void *data;
1342 };
1343
1344 static int refs_from_alternate_cb(struct alternate_object_database *e,
1345 void *data)
1346 {
1347 char *other;
1348 size_t len;
1349 struct remote *remote;
1350 struct transport *transport;
1351 const struct ref *extra;
1352 struct alternate_refs_data *cb = data;
1353
1354 e->name[-1] = '\0';
1355 other = xstrdup(real_path(e->base));
1356 e->name[-1] = '/';
1357 len = strlen(other);
1358
1359 while (other[len-1] == '/')
1360 other[--len] = '\0';
1361 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1362 return 0;
1363 /* Is this a git repository with refs? */
1364 memcpy(other + len - 8, "/refs", 6);
1365 if (!is_directory(other))
1366 return 0;
1367 other[len - 8] = '\0';
1368 remote = remote_get(other);
1369 transport = transport_get(remote, other);
1370 for (extra = transport_get_remote_refs(transport);
1371 extra;
1372 extra = extra->next)
1373 cb->fn(extra, cb->data);
1374 transport_disconnect(transport);
1375 free(other);
1376 return 0;
1377 }
1378
1379 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1380 {
1381 struct alternate_refs_data cb;
1382 cb.fn = fn;
1383 cb.data = data;
1384 foreach_alt_odb(refs_from_alternate_cb, &cb);
1385 }
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