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fetch: support fetching from a shallow repository
[git.git] / transport.c
blob491360be2c4225cc1208bb75dacd1d09ebe476b5
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 struct sha1_array shallow;
460 };
461
462 static int set_git_option(struct git_transport_options *opts,
463 const char *name, const char *value)
464 {
465 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
466 opts->uploadpack = value;
467 return 0;
468 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
469 opts->receivepack = value;
470 return 0;
471 } else if (!strcmp(name, TRANS_OPT_THIN)) {
472 opts->thin = !!value;
473 return 0;
474 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
475 opts->followtags = !!value;
476 return 0;
477 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
478 opts->keep = !!value;
479 return 0;
480 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
481 if (!value)
482 opts->depth = 0;
483 else {
484 char *end;
485 opts->depth = strtol(value, &end, 0);
486 if (*end)
487 die("transport: invalid depth option '%s'", value);
488 }
489 return 0;
490 }
491 return 1;
492 }
493
494 static int connect_setup(struct transport *transport, int for_push, int verbose)
495 {
496 struct git_transport_data *data = transport->data;
497
498 if (data->conn)
499 return 0;
500
501 data->conn = git_connect(data->fd, transport->url,
502 for_push ? data->options.receivepack :
503 data->options.uploadpack,
504 verbose ? CONNECT_VERBOSE : 0);
505
506 return 0;
507 }
508
509 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
510 {
511 struct git_transport_data *data = transport->data;
512 struct ref *refs;
513
514 connect_setup(transport, for_push, 0);
515 get_remote_heads(data->fd[0], NULL, 0, &refs,
516 for_push ? REF_NORMAL : 0,
517 &data->extra_have,
518 &data->shallow);
519 data->got_remote_heads = 1;
520
521 return refs;
522 }
523
524 static int fetch_refs_via_pack(struct transport *transport,
525 int nr_heads, struct ref **to_fetch)
526 {
527 struct git_transport_data *data = transport->data;
528 const struct ref *refs;
529 char *dest = xstrdup(transport->url);
530 struct fetch_pack_args args;
531 struct ref *refs_tmp = NULL;
532
533 memset(&args, 0, sizeof(args));
534 args.uploadpack = data->options.uploadpack;
535 args.keep_pack = data->options.keep;
536 args.lock_pack = 1;
537 args.use_thin_pack = data->options.thin;
538 args.include_tag = data->options.followtags;
539 args.verbose = (transport->verbose > 1);
540 args.quiet = (transport->verbose < 0);
541 args.no_progress = !transport->progress;
542 args.depth = data->options.depth;
543 args.check_self_contained_and_connected =
544 data->options.check_self_contained_and_connected;
545 args.cloning = transport->cloning;
546
547 if (!data->got_remote_heads) {
548 connect_setup(transport, 0, 0);
549 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
550 NULL, &data->shallow);
551 data->got_remote_heads = 1;
552 }
553
554 refs = fetch_pack(&args, data->fd, data->conn,
555 refs_tmp ? refs_tmp : transport->remote_refs,
556 dest, to_fetch, nr_heads, &data->shallow,
557 &transport->pack_lockfile);
558 close(data->fd[0]);
559 close(data->fd[1]);
560 if (finish_connect(data->conn))
561 refs = NULL;
562 data->conn = NULL;
563 data->got_remote_heads = 0;
564 data->options.self_contained_and_connected =
565 args.self_contained_and_connected;
566
567 free_refs(refs_tmp);
568
569 free(dest);
570 return (refs ? 0 : -1);
571 }
572
573 static int push_had_errors(struct ref *ref)
574 {
575 for (; ref; ref = ref->next) {
576 switch (ref->status) {
577 case REF_STATUS_NONE:
578 case REF_STATUS_UPTODATE:
579 case REF_STATUS_OK:
580 break;
581 default:
582 return 1;
583 }
584 }
585 return 0;
586 }
587
588 int transport_refs_pushed(struct ref *ref)
589 {
590 for (; ref; ref = ref->next) {
591 switch(ref->status) {
592 case REF_STATUS_NONE:
593 case REF_STATUS_UPTODATE:
594 break;
595 default:
596 return 1;
597 }
598 }
599 return 0;
600 }
601
602 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
603 {
604 struct refspec rs;
605
606 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
607 return;
608
609 rs.src = ref->name;
610 rs.dst = NULL;
611
612 if (!remote_find_tracking(remote, &rs)) {
613 if (verbose)
614 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
615 if (ref->deletion) {
616 delete_ref(rs.dst, NULL, 0);
617 } else
618 update_ref("update by push", rs.dst,
619 ref->new_sha1, NULL, 0, 0);
620 free(rs.dst);
621 }
622 }
623
624 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
625 {
626 if (porcelain) {
627 if (from)
628 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
629 else
630 fprintf(stdout, "%c\t:%s\t", flag, to->name);
631 if (msg)
632 fprintf(stdout, "%s (%s)\n", summary, msg);
633 else
634 fprintf(stdout, "%s\n", summary);
635 } else {
636 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
637 if (from)
638 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
639 else
640 fputs(prettify_refname(to->name), stderr);
641 if (msg) {
642 fputs(" (", stderr);
643 fputs(msg, stderr);
644 fputc(')', stderr);
645 }
646 fputc('\n', stderr);
647 }
648 }
649
650 static const char *status_abbrev(unsigned char sha1[20])
651 {
652 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
653 }
654
655 static void print_ok_ref_status(struct ref *ref, int porcelain)
656 {
657 if (ref->deletion)
658 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
659 else if (is_null_sha1(ref->old_sha1))
660 print_ref_status('*',
661 (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
662 "[new branch]"),
663 ref, ref->peer_ref, NULL, porcelain);
664 else {
665 char quickref[84];
666 char type;
667 const char *msg;
668
669 strcpy(quickref, status_abbrev(ref->old_sha1));
670 if (ref->forced_update) {
671 strcat(quickref, "...");
672 type = '+';
673 msg = "forced update";
674 } else {
675 strcat(quickref, "..");
676 type = ' ';
677 msg = NULL;
678 }
679 strcat(quickref, status_abbrev(ref->new_sha1));
680
681 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
682 }
683 }
684
685 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
686 {
687 if (!count)
688 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
689
690 switch(ref->status) {
691 case REF_STATUS_NONE:
692 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
693 break;
694 case REF_STATUS_REJECT_NODELETE:
695 print_ref_status('!', "[rejected]", ref, NULL,
696 "remote does not support deleting refs", porcelain);
697 break;
698 case REF_STATUS_UPTODATE:
699 print_ref_status('=', "[up to date]", ref,
700 ref->peer_ref, NULL, porcelain);
701 break;
702 case REF_STATUS_REJECT_NONFASTFORWARD:
703 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
704 "non-fast-forward", porcelain);
705 break;
706 case REF_STATUS_REJECT_ALREADY_EXISTS:
707 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
708 "already exists", porcelain);
709 break;
710 case REF_STATUS_REJECT_FETCH_FIRST:
711 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
712 "fetch first", porcelain);
713 break;
714 case REF_STATUS_REJECT_NEEDS_FORCE:
715 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
716 "needs force", porcelain);
717 break;
718 case REF_STATUS_REJECT_STALE:
719 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
720 "stale info", porcelain);
721 break;
722 case REF_STATUS_REJECT_SHALLOW:
723 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
724 "new shallow roots not allowed", porcelain);
725 break;
726 case REF_STATUS_REMOTE_REJECT:
727 print_ref_status('!', "[remote rejected]", ref,
728 ref->deletion ? NULL : ref->peer_ref,
729 ref->remote_status, porcelain);
730 break;
731 case REF_STATUS_EXPECTING_REPORT:
732 print_ref_status('!', "[remote failure]", ref,
733 ref->deletion ? NULL : ref->peer_ref,
734 "remote failed to report status", porcelain);
735 break;
736 case REF_STATUS_OK:
737 print_ok_ref_status(ref, porcelain);
738 break;
739 }
740
741 return 1;
742 }
743
744 void transport_print_push_status(const char *dest, struct ref *refs,
745 int verbose, int porcelain, unsigned int *reject_reasons)
746 {
747 struct ref *ref;
748 int n = 0;
749 unsigned char head_sha1[20];
750 char *head;
751
752 head = resolve_refdup("HEAD", head_sha1, 1, NULL);
753
754 if (verbose) {
755 for (ref = refs; ref; ref = ref->next)
756 if (ref->status == REF_STATUS_UPTODATE)
757 n += print_one_push_status(ref, dest, n, porcelain);
758 }
759
760 for (ref = refs; ref; ref = ref->next)
761 if (ref->status == REF_STATUS_OK)
762 n += print_one_push_status(ref, dest, n, porcelain);
763
764 *reject_reasons = 0;
765 for (ref = refs; ref; ref = ref->next) {
766 if (ref->status != REF_STATUS_NONE &&
767 ref->status != REF_STATUS_UPTODATE &&
768 ref->status != REF_STATUS_OK)
769 n += print_one_push_status(ref, dest, n, porcelain);
770 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
771 if (head != NULL && !strcmp(head, ref->name))
772 *reject_reasons |= REJECT_NON_FF_HEAD;
773 else
774 *reject_reasons |= REJECT_NON_FF_OTHER;
775 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
776 *reject_reasons |= REJECT_ALREADY_EXISTS;
777 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
778 *reject_reasons |= REJECT_FETCH_FIRST;
779 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
780 *reject_reasons |= REJECT_NEEDS_FORCE;
781 }
782 }
783 }
784
785 void transport_verify_remote_names(int nr_heads, const char **heads)
786 {
787 int i;
788
789 for (i = 0; i < nr_heads; i++) {
790 const char *local = heads[i];
791 const char *remote = strrchr(heads[i], ':');
792
793 if (*local == '+')
794 local++;
795
796 /* A matching refspec is okay. */
797 if (remote == local && remote[1] == '\0')
798 continue;
799
800 remote = remote ? (remote + 1) : local;
801 if (check_refname_format(remote,
802 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
803 die("remote part of refspec is not a valid name in %s",
804 heads[i]);
805 }
806 }
807
808 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
809 {
810 struct git_transport_data *data = transport->data;
811 struct send_pack_args args;
812 int ret;
813
814 if (!data->got_remote_heads) {
815 struct ref *tmp_refs;
816 connect_setup(transport, 1, 0);
817
818 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL, NULL, NULL);
819 data->got_remote_heads = 1;
820 }
821 if (data->shallow.nr)
822 die("pushing to a shallow repository is not supported");
823
824 memset(&args, 0, sizeof(args));
825 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
826 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
827 args.use_thin_pack = data->options.thin;
828 args.verbose = (transport->verbose > 0);
829 args.quiet = (transport->verbose < 0);
830 args.progress = transport->progress;
831 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
832 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
833
834 ret = send_pack(&args, data->fd, data->conn, remote_refs,
835 &data->extra_have);
836
837 close(data->fd[1]);
838 close(data->fd[0]);
839 ret |= finish_connect(data->conn);
840 data->conn = NULL;
841 data->got_remote_heads = 0;
842
843 return ret;
844 }
845
846 static int connect_git(struct transport *transport, const char *name,
847 const char *executable, int fd[2])
848 {
849 struct git_transport_data *data = transport->data;
850 data->conn = git_connect(data->fd, transport->url,
851 executable, 0);
852 fd[0] = data->fd[0];
853 fd[1] = data->fd[1];
854 return 0;
855 }
856
857 static int disconnect_git(struct transport *transport)
858 {
859 struct git_transport_data *data = transport->data;
860 if (data->conn) {
861 if (data->got_remote_heads)
862 packet_flush(data->fd[1]);
863 close(data->fd[0]);
864 close(data->fd[1]);
865 finish_connect(data->conn);
866 }
867
868 free(data);
869 return 0;
870 }
871
872 void transport_take_over(struct transport *transport,
873 struct child_process *child)
874 {
875 struct git_transport_data *data;
876
877 if (!transport->smart_options)
878 die("Bug detected: Taking over transport requires non-NULL "
879 "smart_options field.");
880
881 data = xcalloc(1, sizeof(*data));
882 data->options = *transport->smart_options;
883 data->conn = child;
884 data->fd[0] = data->conn->out;
885 data->fd[1] = data->conn->in;
886 data->got_remote_heads = 0;
887 transport->data = data;
888
889 transport->set_option = NULL;
890 transport->get_refs_list = get_refs_via_connect;
891 transport->fetch = fetch_refs_via_pack;
892 transport->push = NULL;
893 transport->push_refs = git_transport_push;
894 transport->disconnect = disconnect_git;
895 transport->smart_options = &(data->options);
896
897 transport->cannot_reuse = 1;
898 }
899
900 static int is_local(const char *url)
901 {
902 const char *colon = strchr(url, ':');
903 const char *slash = strchr(url, '/');
904 return !colon || (slash && slash < colon) ||
905 has_dos_drive_prefix(url);
906 }
907
908 static int is_file(const char *url)
909 {
910 struct stat buf;
911 if (stat(url, &buf))
912 return 0;
913 return S_ISREG(buf.st_mode);
914 }
915
916 static int external_specification_len(const char *url)
917 {
918 return strchr(url, ':') - url;
919 }
920
921 struct transport *transport_get(struct remote *remote, const char *url)
922 {
923 const char *helper;
924 struct transport *ret = xcalloc(1, sizeof(*ret));
925
926 ret->progress = isatty(2);
927
928 if (!remote)
929 die("No remote provided to transport_get()");
930
931 ret->got_remote_refs = 0;
932 ret->remote = remote;
933 helper = remote->foreign_vcs;
934
935 if (!url && remote->url)
936 url = remote->url[0];
937 ret->url = url;
938
939 /* maybe it is a foreign URL? */
940 if (url) {
941 const char *p = url;
942
943 while (is_urlschemechar(p == url, *p))
944 p++;
945 if (!prefixcmp(p, "::"))
946 helper = xstrndup(url, p - url);
947 }
948
949 if (helper) {
950 transport_helper_init(ret, helper);
951 } else if (!prefixcmp(url, "rsync:")) {
952 ret->get_refs_list = get_refs_via_rsync;
953 ret->fetch = fetch_objs_via_rsync;
954 ret->push = rsync_transport_push;
955 ret->smart_options = NULL;
956 } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
957 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
958 ret->data = data;
959 ret->get_refs_list = get_refs_from_bundle;
960 ret->fetch = fetch_refs_from_bundle;
961 ret->disconnect = close_bundle;
962 ret->smart_options = NULL;
963 } else if (!is_url(url)
964 || !prefixcmp(url, "file://")
965 || !prefixcmp(url, "git://")
966 || !prefixcmp(url, "ssh://")
967 || !prefixcmp(url, "git+ssh://")
968 || !prefixcmp(url, "ssh+git://")) {
969 /* These are builtin smart transports. */
970 struct git_transport_data *data = xcalloc(1, sizeof(*data));
971 ret->data = data;
972 ret->set_option = NULL;
973 ret->get_refs_list = get_refs_via_connect;
974 ret->fetch = fetch_refs_via_pack;
975 ret->push_refs = git_transport_push;
976 ret->connect = connect_git;
977 ret->disconnect = disconnect_git;
978 ret->smart_options = &(data->options);
979
980 data->conn = NULL;
981 data->got_remote_heads = 0;
982 } else {
983 /* Unknown protocol in URL. Pass to external handler. */
984 int len = external_specification_len(url);
985 char *handler = xmalloc(len + 1);
986 handler[len] = 0;
987 strncpy(handler, url, len);
988 transport_helper_init(ret, handler);
989 }
990
991 if (ret->smart_options) {
992 ret->smart_options->thin = 1;
993 ret->smart_options->uploadpack = "git-upload-pack";
994 if (remote->uploadpack)
995 ret->smart_options->uploadpack = remote->uploadpack;
996 ret->smart_options->receivepack = "git-receive-pack";
997 if (remote->receivepack)
998 ret->smart_options->receivepack = remote->receivepack;
999 }
1000
1001 return ret;
1002 }
1003
1004 int transport_set_option(struct transport *transport,
1005 const char *name, const char *value)
1006 {
1007 int git_reports = 1, protocol_reports = 1;
1008
1009 if (transport->smart_options)
1010 git_reports = set_git_option(transport->smart_options,
1011 name, value);
1012
1013 if (transport->set_option)
1014 protocol_reports = transport->set_option(transport, name,
1015 value);
1016
1017 /* If either report is 0, report 0 (success). */
1018 if (!git_reports || !protocol_reports)
1019 return 0;
1020 /* If either reports -1 (invalid value), report -1. */
1021 if ((git_reports == -1) || (protocol_reports == -1))
1022 return -1;
1023 /* Otherwise if both report unknown, report unknown. */
1024 return 1;
1025 }
1026
1027 void transport_set_verbosity(struct transport *transport, int verbosity,
1028 int force_progress)
1029 {
1030 if (verbosity >= 1)
1031 transport->verbose = verbosity <= 3 ? verbosity : 3;
1032 if (verbosity < 0)
1033 transport->verbose = -1;
1034
1035 /**
1036 * Rules used to determine whether to report progress (processing aborts
1037 * when a rule is satisfied):
1038 *
1039 * . Report progress, if force_progress is 1 (ie. --progress).
1040 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1041 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1042 * . Report progress if isatty(2) is 1.
1043 **/
1044 if (force_progress >= 0)
1045 transport->progress = !!force_progress;
1046 else
1047 transport->progress = verbosity >= 0 && isatty(2);
1048 }
1049
1050 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1051 {
1052 int i;
1053
1054 fprintf(stderr, "The following submodule paths contain changes that can\n"
1055 "not be found on any remote:\n");
1056 for (i = 0; i < needs_pushing->nr; i++)
1057 printf(" %s\n", needs_pushing->items[i].string);
1058 fprintf(stderr, "\nPlease try\n\n"
1059 " git push --recurse-submodules=on-demand\n\n"
1060 "or cd to the path and use\n\n"
1061 " git push\n\n"
1062 "to push them to a remote.\n\n");
1063
1064 string_list_clear(needs_pushing, 0);
1065
1066 die("Aborting.");
1067 }
1068
1069 static int run_pre_push_hook(struct transport *transport,
1070 struct ref *remote_refs)
1071 {
1072 int ret = 0, x;
1073 struct ref *r;
1074 struct child_process proc;
1075 struct strbuf buf;
1076 const char *argv[4];
1077
1078 if (!(argv[0] = find_hook("pre-push")))
1079 return 0;
1080
1081 argv[1] = transport->remote->name;
1082 argv[2] = transport->url;
1083 argv[3] = NULL;
1084
1085 memset(&proc, 0, sizeof(proc));
1086 proc.argv = argv;
1087 proc.in = -1;
1088
1089 if (start_command(&proc)) {
1090 finish_command(&proc);
1091 return -1;
1092 }
1093
1094 strbuf_init(&buf, 256);
1095
1096 for (r = remote_refs; r; r = r->next) {
1097 if (!r->peer_ref) continue;
1098 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1099 if (r->status == REF_STATUS_REJECT_STALE) continue;
1100 if (r->status == REF_STATUS_UPTODATE) continue;
1101
1102 strbuf_reset(&buf);
1103 strbuf_addf( &buf, "%s %s %s %s\n",
1104 r->peer_ref->name, sha1_to_hex(r->new_sha1),
1105 r->name, sha1_to_hex(r->old_sha1));
1106
1107 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1108 ret = -1;
1109 break;
1110 }
1111 }
1112
1113 strbuf_release(&buf);
1114
1115 x = close(proc.in);
1116 if (!ret)
1117 ret = x;
1118
1119 x = finish_command(&proc);
1120 if (!ret)
1121 ret = x;
1122
1123 return ret;
1124 }
1125
1126 int transport_push(struct transport *transport,
1127 int refspec_nr, const char **refspec, int flags,
1128 unsigned int *reject_reasons)
1129 {
1130 *reject_reasons = 0;
1131 transport_verify_remote_names(refspec_nr, refspec);
1132
1133 if (transport->push) {
1134 /* Maybe FIXME. But no important transport uses this case. */
1135 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1136 die("This transport does not support using --set-upstream");
1137
1138 return transport->push(transport, refspec_nr, refspec, flags);
1139 } else if (transport->push_refs) {
1140 struct ref *remote_refs =
1141 transport->get_refs_list(transport, 1);
1142 struct ref *local_refs = get_local_heads();
1143 int match_flags = MATCH_REFS_NONE;
1144 int verbose = (transport->verbose > 0);
1145 int quiet = (transport->verbose < 0);
1146 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1147 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1148 int push_ret, ret, err;
1149
1150 if (flags & TRANSPORT_PUSH_ALL)
1151 match_flags |= MATCH_REFS_ALL;
1152 if (flags & TRANSPORT_PUSH_MIRROR)
1153 match_flags |= MATCH_REFS_MIRROR;
1154 if (flags & TRANSPORT_PUSH_PRUNE)
1155 match_flags |= MATCH_REFS_PRUNE;
1156 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1157 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1158
1159 if (match_push_refs(local_refs, &remote_refs,
1160 refspec_nr, refspec, match_flags)) {
1161 return -1;
1162 }
1163
1164 if (transport->smart_options &&
1165 transport->smart_options->cas &&
1166 !is_empty_cas(transport->smart_options->cas))
1167 apply_push_cas(transport->smart_options->cas,
1168 transport->remote, remote_refs);
1169
1170 set_ref_status_for_push(remote_refs,
1171 flags & TRANSPORT_PUSH_MIRROR,
1172 flags & TRANSPORT_PUSH_FORCE);
1173
1174 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1175 if (run_pre_push_hook(transport, remote_refs))
1176 return -1;
1177
1178 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1179 struct ref *ref = remote_refs;
1180 for (; ref; ref = ref->next)
1181 if (!is_null_sha1(ref->new_sha1) &&
1182 !push_unpushed_submodules(ref->new_sha1,
1183 transport->remote->name))
1184 die ("Failed to push all needed submodules!");
1185 }
1186
1187 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1188 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1189 struct ref *ref = remote_refs;
1190 struct string_list needs_pushing;
1191
1192 memset(&needs_pushing, 0, sizeof(struct string_list));
1193 needs_pushing.strdup_strings = 1;
1194 for (; ref; ref = ref->next)
1195 if (!is_null_sha1(ref->new_sha1) &&
1196 find_unpushed_submodules(ref->new_sha1,
1197 transport->remote->name, &needs_pushing))
1198 die_with_unpushed_submodules(&needs_pushing);
1199 }
1200
1201 push_ret = transport->push_refs(transport, remote_refs, flags);
1202 err = push_had_errors(remote_refs);
1203 ret = push_ret | err;
1204
1205 if (!quiet || err)
1206 transport_print_push_status(transport->url, remote_refs,
1207 verbose | porcelain, porcelain,
1208 reject_reasons);
1209
1210 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1211 set_upstreams(transport, remote_refs, pretend);
1212
1213 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1214 struct ref *ref;
1215 for (ref = remote_refs; ref; ref = ref->next)
1216 transport_update_tracking_ref(transport->remote, ref, verbose);
1217 }
1218
1219 if (porcelain && !push_ret)
1220 puts("Done");
1221 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1222 fprintf(stderr, "Everything up-to-date\n");
1223
1224 return ret;
1225 }
1226 return 1;
1227 }
1228
1229 const struct ref *transport_get_remote_refs(struct transport *transport)
1230 {
1231 if (!transport->got_remote_refs) {
1232 transport->remote_refs = transport->get_refs_list(transport, 0);
1233 transport->got_remote_refs = 1;
1234 }
1235
1236 return transport->remote_refs;
1237 }
1238
1239 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1240 {
1241 int rc;
1242 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1243 struct ref **heads = NULL;
1244 struct ref *rm;
1245
1246 for (rm = refs; rm; rm = rm->next) {
1247 nr_refs++;
1248 if (rm->peer_ref &&
1249 !is_null_sha1(rm->old_sha1) &&
1250 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1251 continue;
1252 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1253 heads[nr_heads++] = rm;
1254 }
1255
1256 if (!nr_heads) {
1257 /*
1258 * When deepening of a shallow repository is requested,
1259 * then local and remote refs are likely to still be equal.
1260 * Just feed them all to the fetch method in that case.
1261 * This condition shouldn't be met in a non-deepening fetch
1262 * (see builtin/fetch.c:quickfetch()).
1263 */
1264 heads = xmalloc(nr_refs * sizeof(*heads));
1265 for (rm = refs; rm; rm = rm->next)
1266 heads[nr_heads++] = rm;
1267 }
1268
1269 rc = transport->fetch(transport, nr_heads, heads);
1270
1271 free(heads);
1272 return rc;
1273 }
1274
1275 void transport_unlock_pack(struct transport *transport)
1276 {
1277 if (transport->pack_lockfile) {
1278 unlink_or_warn(transport->pack_lockfile);
1279 free(transport->pack_lockfile);
1280 transport->pack_lockfile = NULL;
1281 }
1282 }
1283
1284 int transport_connect(struct transport *transport, const char *name,
1285 const char *exec, int fd[2])
1286 {
1287 if (transport->connect)
1288 return transport->connect(transport, name, exec, fd);
1289 else
1290 die("Operation not supported by protocol");
1291 }
1292
1293 int transport_disconnect(struct transport *transport)
1294 {
1295 int ret = 0;
1296 if (transport->disconnect)
1297 ret = transport->disconnect(transport);
1298 free(transport);
1299 return ret;
1300 }
1301
1302 /*
1303 * Strip username (and password) from a URL and return
1304 * it in a newly allocated string.
1305 */
1306 char *transport_anonymize_url(const char *url)
1307 {
1308 char *anon_url, *scheme_prefix, *anon_part;
1309 size_t anon_len, prefix_len = 0;
1310
1311 anon_part = strchr(url, '@');
1312 if (is_local(url) || !anon_part)
1313 goto literal_copy;
1314
1315 anon_len = strlen(++anon_part);
1316 scheme_prefix = strstr(url, "://");
1317 if (!scheme_prefix) {
1318 if (!strchr(anon_part, ':'))
1319 /* cannot be "me@there:/path/name" */
1320 goto literal_copy;
1321 } else {
1322 const char *cp;
1323 /* make sure scheme is reasonable */
1324 for (cp = url; cp < scheme_prefix; cp++) {
1325 switch (*cp) {
1326 /* RFC 1738 2.1 */
1327 case '+': case '.': case '-':
1328 break; /* ok */
1329 default:
1330 if (isalnum(*cp))
1331 break;
1332 /* it isn't */
1333 goto literal_copy;
1334 }
1335 }
1336 /* @ past the first slash does not count */
1337 cp = strchr(scheme_prefix + 3, '/');
1338 if (cp && cp < anon_part)
1339 goto literal_copy;
1340 prefix_len = scheme_prefix - url + 3;
1341 }
1342 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1343 memcpy(anon_url, url, prefix_len);
1344 memcpy(anon_url + prefix_len, anon_part, anon_len);
1345 return anon_url;
1346 literal_copy:
1347 return xstrdup(url);
1348 }
1349
1350 struct alternate_refs_data {
1351 alternate_ref_fn *fn;
1352 void *data;
1353 };
1354
1355 static int refs_from_alternate_cb(struct alternate_object_database *e,
1356 void *data)
1357 {
1358 char *other;
1359 size_t len;
1360 struct remote *remote;
1361 struct transport *transport;
1362 const struct ref *extra;
1363 struct alternate_refs_data *cb = data;
1364
1365 e->name[-1] = '\0';
1366 other = xstrdup(real_path(e->base));
1367 e->name[-1] = '/';
1368 len = strlen(other);
1369
1370 while (other[len-1] == '/')
1371 other[--len] = '\0';
1372 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1373 return 0;
1374 /* Is this a git repository with refs? */
1375 memcpy(other + len - 8, "/refs", 6);
1376 if (!is_directory(other))
1377 return 0;
1378 other[len - 8] = '\0';
1379 remote = remote_get(other);
1380 transport = transport_get(remote, other);
1381 for (extra = transport_get_remote_refs(transport);
1382 extra;
1383 extra = extra->next)
1384 cb->fn(extra, cb->data);
1385 transport_disconnect(transport);
1386 free(other);
1387 return 0;
1388 }
1389
1390 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1391 {
1392 struct alternate_refs_data cb;
1393 cb.fn = fn;
1394 cb.data = data;
1395 foreach_alt_odb(refs_from_alternate_cb, &cb);
1396 }
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