git-push: add documentation for the newly added --mirror mode
[git/git.git] / transport.c
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #ifndef NO_CURL
5 #include "http.h"
6 #endif
7 #include "pkt-line.h"
8 #include "fetch-pack.h"
9 #include "send-pack.h"
10 #include "walker.h"
11 #include "bundle.h"
12 #include "dir.h"
13 #include "refs.h"
14
15 /* rsync support */
16
17 /*
18 * We copy packed-refs and refs/ into a temporary file, then read the
19 * loose refs recursively (sorting whenever possible), and then inserting
20 * those packed refs that are not yet in the list (not validating, but
21 * assuming that the file is sorted).
22 *
23 * Appears refactoring this from refs.c is too cumbersome.
24 */
25
26 static int str_cmp(const void *a, const void *b)
27 {
28 const char *s1 = a;
29 const char *s2 = b;
30
31 return strcmp(s1, s2);
32 }
33
34 /* path->buf + name_offset is expected to point to "refs/" */
35
36 static int read_loose_refs(struct strbuf *path, int name_offset,
37 struct ref **tail)
38 {
39 DIR *dir = opendir(path->buf);
40 struct dirent *de;
41 struct {
42 char **entries;
43 int nr, alloc;
44 } list;
45 int i, pathlen;
46
47 if (!dir)
48 return -1;
49
50 memset (&list, 0, sizeof(list));
51
52 while ((de = readdir(dir))) {
53 if (de->d_name[0] == '.' && (de->d_name[1] == '\0' ||
54 (de->d_name[1] == '.' &&
55 de->d_name[2] == '\0')))
56 continue;
57 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
58 list.entries[list.nr++] = xstrdup(de->d_name);
59 }
60 closedir(dir);
61
62 /* sort the list */
63
64 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
65
66 pathlen = path->len;
67 strbuf_addch(path, '/');
68
69 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
70 strbuf_addstr(path, list.entries[i]);
71 if (read_loose_refs(path, name_offset, tail)) {
72 int fd = open(path->buf, O_RDONLY);
73 char buffer[40];
74 struct ref *next;
75
76 if (fd < 0)
77 continue;
78 next = alloc_ref(path->len - name_offset + 1);
79 if (read_in_full(fd, buffer, 40) != 40 ||
80 get_sha1_hex(buffer, next->old_sha1)) {
81 close(fd);
82 free(next);
83 continue;
84 }
85 close(fd);
86 strcpy(next->name, path->buf + name_offset);
87 (*tail)->next = next;
88 *tail = next;
89 }
90 }
91 strbuf_setlen(path, pathlen);
92
93 for (i = 0; i < list.nr; i++)
94 free(list.entries[i]);
95 free(list.entries);
96
97 return 0;
98 }
99
100 /* insert the packed refs for which no loose refs were found */
101
102 static void insert_packed_refs(const char *packed_refs, struct ref **list)
103 {
104 FILE *f = fopen(packed_refs, "r");
105 static char buffer[PATH_MAX];
106
107 if (!f)
108 return;
109
110 for (;;) {
111 int cmp = cmp, len;
112
113 if (!fgets(buffer, sizeof(buffer), f)) {
114 fclose(f);
115 return;
116 }
117
118 if (hexval(buffer[0]) > 0xf)
119 continue;
120 len = strlen(buffer);
121 if (buffer[len - 1] == '\n')
122 buffer[--len] = '\0';
123 if (len < 41)
124 continue;
125 while ((*list)->next &&
126 (cmp = strcmp(buffer + 41,
127 (*list)->next->name)) > 0)
128 list = &(*list)->next;
129 if (!(*list)->next || cmp < 0) {
130 struct ref *next = alloc_ref(len - 40);
131 buffer[40] = '\0';
132 if (get_sha1_hex(buffer, next->old_sha1)) {
133 warning ("invalid SHA-1: %s", buffer);
134 free(next);
135 continue;
136 }
137 strcpy(next->name, buffer + 41);
138 next->next = (*list)->next;
139 (*list)->next = next;
140 list = &(*list)->next;
141 }
142 }
143 }
144
145 static struct ref *get_refs_via_rsync(struct transport *transport)
146 {
147 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
148 struct ref dummy, *tail = &dummy;
149 struct child_process rsync;
150 const char *args[5];
151 int temp_dir_len;
152
153 /* copy the refs to the temporary directory */
154
155 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
156 if (!mkdtemp(temp_dir.buf))
157 die ("Could not make temporary directory");
158 temp_dir_len = temp_dir.len;
159
160 strbuf_addstr(&buf, transport->url);
161 strbuf_addstr(&buf, "/refs");
162
163 memset(&rsync, 0, sizeof(rsync));
164 rsync.argv = args;
165 rsync.stdout_to_stderr = 1;
166 args[0] = "rsync";
167 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
168 args[2] = buf.buf;
169 args[3] = temp_dir.buf;
170 args[4] = NULL;
171
172 if (run_command(&rsync))
173 die ("Could not run rsync to get refs");
174
175 strbuf_reset(&buf);
176 strbuf_addstr(&buf, transport->url);
177 strbuf_addstr(&buf, "/packed-refs");
178
179 args[2] = buf.buf;
180
181 if (run_command(&rsync))
182 die ("Could not run rsync to get refs");
183
184 /* read the copied refs */
185
186 strbuf_addstr(&temp_dir, "/refs");
187 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
188 strbuf_setlen(&temp_dir, temp_dir_len);
189
190 tail = &dummy;
191 strbuf_addstr(&temp_dir, "/packed-refs");
192 insert_packed_refs(temp_dir.buf, &tail);
193 strbuf_setlen(&temp_dir, temp_dir_len);
194
195 if (remove_dir_recursively(&temp_dir, 0))
196 warning ("Error removing temporary directory %s.",
197 temp_dir.buf);
198
199 strbuf_release(&buf);
200 strbuf_release(&temp_dir);
201
202 return dummy.next;
203 }
204
205 static int fetch_objs_via_rsync(struct transport *transport,
206 int nr_objs, struct ref **to_fetch)
207 {
208 struct strbuf buf = STRBUF_INIT;
209 struct child_process rsync;
210 const char *args[8];
211 int result;
212
213 strbuf_addstr(&buf, transport->url);
214 strbuf_addstr(&buf, "/objects/");
215
216 memset(&rsync, 0, sizeof(rsync));
217 rsync.argv = args;
218 rsync.stdout_to_stderr = 1;
219 args[0] = "rsync";
220 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
221 args[2] = "--ignore-existing";
222 args[3] = "--exclude";
223 args[4] = "info";
224 args[5] = buf.buf;
225 args[6] = get_object_directory();
226 args[7] = NULL;
227
228 /* NEEDSWORK: handle one level of alternates */
229 result = run_command(&rsync);
230
231 strbuf_release(&buf);
232
233 return result;
234 }
235
236 static int write_one_ref(const char *name, const unsigned char *sha1,
237 int flags, void *data)
238 {
239 struct strbuf *buf = data;
240 int len = buf->len;
241 FILE *f;
242
243 /* when called via for_each_ref(), flags is non-zero */
244 if (flags && prefixcmp(name, "refs/heads/") &&
245 prefixcmp(name, "refs/tags/"))
246 return 0;
247
248 strbuf_addstr(buf, name);
249 if (safe_create_leading_directories(buf->buf) ||
250 !(f = fopen(buf->buf, "w")) ||
251 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
252 fclose(f))
253 return error("problems writing temporary file %s", buf->buf);
254 strbuf_setlen(buf, len);
255 return 0;
256 }
257
258 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
259 int refspec_nr, const char **refspec)
260 {
261 int i;
262
263 for (i = 0; i < refspec_nr; i++) {
264 unsigned char sha1[20];
265 char *ref;
266
267 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
268 return error("Could not get ref %s", refspec[i]);
269
270 if (write_one_ref(ref, sha1, 0, temp_dir)) {
271 free(ref);
272 return -1;
273 }
274 free(ref);
275 }
276 return 0;
277 }
278
279 static int rsync_transport_push(struct transport *transport,
280 int refspec_nr, const char **refspec, int flags)
281 {
282 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
283 int result = 0, i;
284 struct child_process rsync;
285 const char *args[10];
286
287 if (flags & TRANSPORT_PUSH_MIRROR)
288 return error("rsync transport does not support mirror mode");
289
290 /* first push the objects */
291
292 strbuf_addstr(&buf, transport->url);
293 strbuf_addch(&buf, '/');
294
295 memset(&rsync, 0, sizeof(rsync));
296 rsync.argv = args;
297 rsync.stdout_to_stderr = 1;
298 i = 0;
299 args[i++] = "rsync";
300 args[i++] = "-a";
301 if (flags & TRANSPORT_PUSH_DRY_RUN)
302 args[i++] = "--dry-run";
303 if (transport->verbose > 0)
304 args[i++] = "-v";
305 args[i++] = "--ignore-existing";
306 args[i++] = "--exclude";
307 args[i++] = "info";
308 args[i++] = get_object_directory();
309 args[i++] = buf.buf;
310 args[i++] = NULL;
311
312 if (run_command(&rsync))
313 return error("Could not push objects to %s", transport->url);
314
315 /* copy the refs to the temporary directory; they could be packed. */
316
317 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
318 if (!mkdtemp(temp_dir.buf))
319 die ("Could not make temporary directory");
320 strbuf_addch(&temp_dir, '/');
321
322 if (flags & TRANSPORT_PUSH_ALL) {
323 if (for_each_ref(write_one_ref, &temp_dir))
324 return -1;
325 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
326 return -1;
327
328 i = 2;
329 if (flags & TRANSPORT_PUSH_DRY_RUN)
330 args[i++] = "--dry-run";
331 if (!(flags & TRANSPORT_PUSH_FORCE))
332 args[i++] = "--ignore-existing";
333 args[i++] = temp_dir.buf;
334 args[i++] = transport->url;
335 args[i++] = NULL;
336 if (run_command(&rsync))
337 result = error("Could not push to %s", transport->url);
338
339 if (remove_dir_recursively(&temp_dir, 0))
340 warning ("Could not remove temporary directory %s.",
341 temp_dir.buf);
342
343 strbuf_release(&buf);
344 strbuf_release(&temp_dir);
345
346 return result;
347 }
348
349 /* Generic functions for using commit walkers */
350
351 static int fetch_objs_via_walker(struct transport *transport,
352 int nr_objs, struct ref **to_fetch)
353 {
354 char *dest = xstrdup(transport->url);
355 struct walker *walker = transport->data;
356 char **objs = xmalloc(nr_objs * sizeof(*objs));
357 int i;
358
359 walker->get_all = 1;
360 walker->get_tree = 1;
361 walker->get_history = 1;
362 walker->get_verbosely = transport->verbose >= 0;
363 walker->get_recover = 0;
364
365 for (i = 0; i < nr_objs; i++)
366 objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
367
368 if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
369 die("Fetch failed.");
370
371 for (i = 0; i < nr_objs; i++)
372 free(objs[i]);
373 free(objs);
374 free(dest);
375 return 0;
376 }
377
378 static int disconnect_walker(struct transport *transport)
379 {
380 struct walker *walker = transport->data;
381 if (walker)
382 walker_free(walker);
383 return 0;
384 }
385
386 #ifndef NO_CURL
387 static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
388 {
389 const char **argv;
390 int argc;
391 int err;
392
393 if (flags & TRANSPORT_PUSH_MIRROR)
394 return error("http transport does not support mirror mode");
395
396 argv = xmalloc((refspec_nr + 11) * sizeof(char *));
397 argv[0] = "http-push";
398 argc = 1;
399 if (flags & TRANSPORT_PUSH_ALL)
400 argv[argc++] = "--all";
401 if (flags & TRANSPORT_PUSH_FORCE)
402 argv[argc++] = "--force";
403 if (flags & TRANSPORT_PUSH_DRY_RUN)
404 argv[argc++] = "--dry-run";
405 argv[argc++] = transport->url;
406 while (refspec_nr--)
407 argv[argc++] = *refspec++;
408 argv[argc] = NULL;
409 err = run_command_v_opt(argv, RUN_GIT_CMD);
410 switch (err) {
411 case -ERR_RUN_COMMAND_FORK:
412 error("unable to fork for %s", argv[0]);
413 case -ERR_RUN_COMMAND_EXEC:
414 error("unable to exec %s", argv[0]);
415 break;
416 case -ERR_RUN_COMMAND_WAITPID:
417 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
418 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
419 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
420 error("%s died with strange error", argv[0]);
421 }
422 return !!err;
423 }
424
425 static int missing__target(int code, int result)
426 {
427 return /* file:// URL -- do we ever use one??? */
428 (result == CURLE_FILE_COULDNT_READ_FILE) ||
429 /* http:// and https:// URL */
430 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
431 /* ftp:// URL */
432 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
433 ;
434 }
435
436 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
437
438 static struct ref *get_refs_via_curl(struct transport *transport)
439 {
440 struct buffer buffer;
441 char *data, *start, *mid;
442 char *ref_name;
443 char *refs_url;
444 int i = 0;
445
446 struct active_request_slot *slot;
447 struct slot_results results;
448
449 struct ref *refs = NULL;
450 struct ref *ref = NULL;
451 struct ref *last_ref = NULL;
452
453 data = xmalloc(4096);
454 buffer.size = 4096;
455 buffer.posn = 0;
456 buffer.buffer = data;
457
458 refs_url = xmalloc(strlen(transport->url) + 11);
459 sprintf(refs_url, "%s/info/refs", transport->url);
460
461 http_init();
462
463 slot = get_active_slot();
464 slot->results = &results;
465 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
466 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
467 curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
468 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
469 if (start_active_slot(slot)) {
470 run_active_slot(slot);
471 if (results.curl_result != CURLE_OK) {
472 if (missing_target(&results)) {
473 free(buffer.buffer);
474 return NULL;
475 } else {
476 free(buffer.buffer);
477 error("%s", curl_errorstr);
478 return NULL;
479 }
480 }
481 } else {
482 free(buffer.buffer);
483 error("Unable to start request");
484 return NULL;
485 }
486
487 http_cleanup();
488
489 data = buffer.buffer;
490 start = NULL;
491 mid = data;
492 while (i < buffer.posn) {
493 if (!start)
494 start = &data[i];
495 if (data[i] == '\t')
496 mid = &data[i];
497 if (data[i] == '\n') {
498 data[i] = 0;
499 ref_name = mid + 1;
500 ref = xmalloc(sizeof(struct ref) +
501 strlen(ref_name) + 1);
502 memset(ref, 0, sizeof(struct ref));
503 strcpy(ref->name, ref_name);
504 get_sha1_hex(start, ref->old_sha1);
505 if (!refs)
506 refs = ref;
507 if (last_ref)
508 last_ref->next = ref;
509 last_ref = ref;
510 start = NULL;
511 }
512 i++;
513 }
514
515 free(buffer.buffer);
516
517 return refs;
518 }
519
520 static int fetch_objs_via_curl(struct transport *transport,
521 int nr_objs, struct ref **to_fetch)
522 {
523 if (!transport->data)
524 transport->data = get_http_walker(transport->url);
525 return fetch_objs_via_walker(transport, nr_objs, to_fetch);
526 }
527
528 #endif
529
530 struct bundle_transport_data {
531 int fd;
532 struct bundle_header header;
533 };
534
535 static struct ref *get_refs_from_bundle(struct transport *transport)
536 {
537 struct bundle_transport_data *data = transport->data;
538 struct ref *result = NULL;
539 int i;
540
541 if (data->fd > 0)
542 close(data->fd);
543 data->fd = read_bundle_header(transport->url, &data->header);
544 if (data->fd < 0)
545 die ("Could not read bundle '%s'.", transport->url);
546 for (i = 0; i < data->header.references.nr; i++) {
547 struct ref_list_entry *e = data->header.references.list + i;
548 struct ref *ref = alloc_ref(strlen(e->name) + 1);
549 hashcpy(ref->old_sha1, e->sha1);
550 strcpy(ref->name, e->name);
551 ref->next = result;
552 result = ref;
553 }
554 return result;
555 }
556
557 static int fetch_refs_from_bundle(struct transport *transport,
558 int nr_heads, struct ref **to_fetch)
559 {
560 struct bundle_transport_data *data = transport->data;
561 return unbundle(&data->header, data->fd);
562 }
563
564 static int close_bundle(struct transport *transport)
565 {
566 struct bundle_transport_data *data = transport->data;
567 if (data->fd > 0)
568 close(data->fd);
569 free(data);
570 return 0;
571 }
572
573 struct git_transport_data {
574 unsigned thin : 1;
575 unsigned keep : 1;
576 int depth;
577 const char *uploadpack;
578 const char *receivepack;
579 };
580
581 static int set_git_option(struct transport *connection,
582 const char *name, const char *value)
583 {
584 struct git_transport_data *data = connection->data;
585 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
586 data->uploadpack = value;
587 return 0;
588 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
589 data->receivepack = value;
590 return 0;
591 } else if (!strcmp(name, TRANS_OPT_THIN)) {
592 data->thin = !!value;
593 return 0;
594 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
595 data->keep = !!value;
596 return 0;
597 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
598 if (!value)
599 data->depth = 0;
600 else
601 data->depth = atoi(value);
602 return 0;
603 }
604 return 1;
605 }
606
607 static struct ref *get_refs_via_connect(struct transport *transport)
608 {
609 struct git_transport_data *data = transport->data;
610 struct ref *refs;
611 int fd[2];
612 char *dest = xstrdup(transport->url);
613 struct child_process *conn = git_connect(fd, dest, data->uploadpack, 0);
614
615 get_remote_heads(fd[0], &refs, 0, NULL, 0);
616 packet_flush(fd[1]);
617
618 finish_connect(conn);
619
620 free(dest);
621
622 return refs;
623 }
624
625 static int fetch_refs_via_pack(struct transport *transport,
626 int nr_heads, struct ref **to_fetch)
627 {
628 struct git_transport_data *data = transport->data;
629 char **heads = xmalloc(nr_heads * sizeof(*heads));
630 char **origh = xmalloc(nr_heads * sizeof(*origh));
631 struct ref *refs;
632 char *dest = xstrdup(transport->url);
633 struct fetch_pack_args args;
634 int i;
635
636 memset(&args, 0, sizeof(args));
637 args.uploadpack = data->uploadpack;
638 args.keep_pack = data->keep;
639 args.lock_pack = 1;
640 args.use_thin_pack = data->thin;
641 args.verbose = transport->verbose > 0;
642 args.depth = data->depth;
643
644 for (i = 0; i < nr_heads; i++)
645 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
646 refs = fetch_pack(&args, dest, nr_heads, heads, &transport->pack_lockfile);
647
648 for (i = 0; i < nr_heads; i++)
649 free(origh[i]);
650 free(origh);
651 free(heads);
652 free_refs(refs);
653 free(dest);
654 return 0;
655 }
656
657 static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
658 {
659 struct git_transport_data *data = transport->data;
660 struct send_pack_args args;
661
662 args.receivepack = data->receivepack;
663 args.send_all = !!(flags & TRANSPORT_PUSH_ALL);
664 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
665 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
666 args.use_thin_pack = data->thin;
667 args.verbose = transport->verbose;
668 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
669
670 return send_pack(&args, transport->url, transport->remote, refspec_nr, refspec);
671 }
672
673 static int disconnect_git(struct transport *transport)
674 {
675 free(transport->data);
676 return 0;
677 }
678
679 static int is_local(const char *url)
680 {
681 const char *colon = strchr(url, ':');
682 const char *slash = strchr(url, '/');
683 return !colon || (slash && slash < colon);
684 }
685
686 static int is_file(const char *url)
687 {
688 struct stat buf;
689 if (stat(url, &buf))
690 return 0;
691 return S_ISREG(buf.st_mode);
692 }
693
694 struct transport *transport_get(struct remote *remote, const char *url)
695 {
696 struct transport *ret = xcalloc(1, sizeof(*ret));
697
698 ret->remote = remote;
699 ret->url = url;
700
701 if (!prefixcmp(url, "rsync://")) {
702 ret->get_refs_list = get_refs_via_rsync;
703 ret->fetch = fetch_objs_via_rsync;
704 ret->push = rsync_transport_push;
705
706 } else if (!prefixcmp(url, "http://")
707 || !prefixcmp(url, "https://")
708 || !prefixcmp(url, "ftp://")) {
709 #ifdef NO_CURL
710 error("git was compiled without libcurl support.");
711 #else
712 ret->get_refs_list = get_refs_via_curl;
713 ret->fetch = fetch_objs_via_curl;
714 ret->push = curl_transport_push;
715 #endif
716 ret->disconnect = disconnect_walker;
717
718 } else if (is_local(url) && is_file(url)) {
719 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
720 ret->data = data;
721 ret->get_refs_list = get_refs_from_bundle;
722 ret->fetch = fetch_refs_from_bundle;
723 ret->disconnect = close_bundle;
724
725 } else {
726 struct git_transport_data *data = xcalloc(1, sizeof(*data));
727 ret->data = data;
728 ret->set_option = set_git_option;
729 ret->get_refs_list = get_refs_via_connect;
730 ret->fetch = fetch_refs_via_pack;
731 ret->push = git_transport_push;
732 ret->disconnect = disconnect_git;
733
734 data->thin = 1;
735 data->uploadpack = "git-upload-pack";
736 if (remote && remote->uploadpack)
737 data->uploadpack = remote->uploadpack;
738 data->receivepack = "git-receive-pack";
739 if (remote && remote->receivepack)
740 data->receivepack = remote->receivepack;
741 }
742
743 return ret;
744 }
745
746 int transport_set_option(struct transport *transport,
747 const char *name, const char *value)
748 {
749 if (transport->set_option)
750 return transport->set_option(transport, name, value);
751 return 1;
752 }
753
754 int transport_push(struct transport *transport,
755 int refspec_nr, const char **refspec, int flags)
756 {
757 if (!transport->push)
758 return 1;
759 return transport->push(transport, refspec_nr, refspec, flags);
760 }
761
762 const struct ref *transport_get_remote_refs(struct transport *transport)
763 {
764 if (!transport->remote_refs)
765 transport->remote_refs = transport->get_refs_list(transport);
766 return transport->remote_refs;
767 }
768
769 int transport_fetch_refs(struct transport *transport, struct ref *refs)
770 {
771 int rc;
772 int nr_heads = 0, nr_alloc = 0;
773 struct ref **heads = NULL;
774 struct ref *rm;
775
776 for (rm = refs; rm; rm = rm->next) {
777 if (rm->peer_ref &&
778 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
779 continue;
780 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
781 heads[nr_heads++] = rm;
782 }
783
784 rc = transport->fetch(transport, nr_heads, heads);
785 free(heads);
786 return rc;
787 }
788
789 void transport_unlock_pack(struct transport *transport)
790 {
791 if (transport->pack_lockfile) {
792 unlink(transport->pack_lockfile);
793 free(transport->pack_lockfile);
794 transport->pack_lockfile = NULL;
795 }
796 }
797
798 int transport_disconnect(struct transport *transport)
799 {
800 int ret = 0;
801 if (transport->disconnect)
802 ret = transport->disconnect(transport);
803 free(transport);
804 return ret;
805 }