Merge branch 'db/remote-builtin' into jk/send-pack
[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 /* first push the objects */
288
289 strbuf_addstr(&buf, transport->url);
290 strbuf_addch(&buf, '/');
291
292 memset(&rsync, 0, sizeof(rsync));
293 rsync.argv = args;
294 rsync.stdout_to_stderr = 1;
295 i = 0;
296 args[i++] = "rsync";
297 args[i++] = "-a";
298 if (flags & TRANSPORT_PUSH_DRY_RUN)
299 args[i++] = "--dry-run";
300 if (transport->verbose > 0)
301 args[i++] = "-v";
302 args[i++] = "--ignore-existing";
303 args[i++] = "--exclude";
304 args[i++] = "info";
305 args[i++] = get_object_directory();
306 args[i++] = buf.buf;
307 args[i++] = NULL;
308
309 if (run_command(&rsync))
310 return error("Could not push objects to %s", transport->url);
311
312 /* copy the refs to the temporary directory; they could be packed. */
313
314 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
315 if (!mkdtemp(temp_dir.buf))
316 die ("Could not make temporary directory");
317 strbuf_addch(&temp_dir, '/');
318
319 if (flags & TRANSPORT_PUSH_ALL) {
320 if (for_each_ref(write_one_ref, &temp_dir))
321 return -1;
322 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
323 return -1;
324
325 i = 2;
326 if (flags & TRANSPORT_PUSH_DRY_RUN)
327 args[i++] = "--dry-run";
328 if (!(flags & TRANSPORT_PUSH_FORCE))
329 args[i++] = "--ignore-existing";
330 args[i++] = temp_dir.buf;
331 args[i++] = transport->url;
332 args[i++] = NULL;
333 if (run_command(&rsync))
334 result = error("Could not push to %s", transport->url);
335
336 if (remove_dir_recursively(&temp_dir, 0))
337 warning ("Could not remove temporary directory %s.",
338 temp_dir.buf);
339
340 strbuf_release(&buf);
341 strbuf_release(&temp_dir);
342
343 return result;
344 }
345
346 /* Generic functions for using commit walkers */
347
348 static int fetch_objs_via_walker(struct transport *transport,
349 int nr_objs, struct ref **to_fetch)
350 {
351 char *dest = xstrdup(transport->url);
352 struct walker *walker = transport->data;
353 char **objs = xmalloc(nr_objs * sizeof(*objs));
354 int i;
355
356 walker->get_all = 1;
357 walker->get_tree = 1;
358 walker->get_history = 1;
359 walker->get_verbosely = transport->verbose >= 0;
360 walker->get_recover = 0;
361
362 for (i = 0; i < nr_objs; i++)
363 objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
364
365 if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
366 die("Fetch failed.");
367
368 for (i = 0; i < nr_objs; i++)
369 free(objs[i]);
370 free(objs);
371 free(dest);
372 return 0;
373 }
374
375 static int disconnect_walker(struct transport *transport)
376 {
377 struct walker *walker = transport->data;
378 if (walker)
379 walker_free(walker);
380 return 0;
381 }
382
383 #ifndef NO_CURL
384 static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
385 {
386 const char **argv;
387 int argc;
388 int err;
389
390 argv = xmalloc((refspec_nr + 12) * sizeof(char *));
391 argv[0] = "http-push";
392 argc = 1;
393 if (flags & TRANSPORT_PUSH_ALL)
394 argv[argc++] = "--all";
395 if (flags & TRANSPORT_PUSH_FORCE)
396 argv[argc++] = "--force";
397 if (flags & TRANSPORT_PUSH_DRY_RUN)
398 argv[argc++] = "--dry-run";
399 if (flags & TRANSPORT_PUSH_VERBOSE)
400 argv[argc++] = "--verbose";
401 argv[argc++] = transport->url;
402 while (refspec_nr--)
403 argv[argc++] = *refspec++;
404 argv[argc] = NULL;
405 err = run_command_v_opt(argv, RUN_GIT_CMD);
406 switch (err) {
407 case -ERR_RUN_COMMAND_FORK:
408 error("unable to fork for %s", argv[0]);
409 case -ERR_RUN_COMMAND_EXEC:
410 error("unable to exec %s", argv[0]);
411 break;
412 case -ERR_RUN_COMMAND_WAITPID:
413 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
414 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
415 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
416 error("%s died with strange error", argv[0]);
417 }
418 return !!err;
419 }
420
421 static int missing__target(int code, int result)
422 {
423 return /* file:// URL -- do we ever use one??? */
424 (result == CURLE_FILE_COULDNT_READ_FILE) ||
425 /* http:// and https:// URL */
426 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
427 /* ftp:// URL */
428 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
429 ;
430 }
431
432 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
433
434 static struct ref *get_refs_via_curl(struct transport *transport)
435 {
436 struct buffer buffer;
437 char *data, *start, *mid;
438 char *ref_name;
439 char *refs_url;
440 int i = 0;
441
442 struct active_request_slot *slot;
443 struct slot_results results;
444
445 struct ref *refs = NULL;
446 struct ref *ref = NULL;
447 struct ref *last_ref = NULL;
448
449 data = xmalloc(4096);
450 buffer.size = 4096;
451 buffer.posn = 0;
452 buffer.buffer = data;
453
454 refs_url = xmalloc(strlen(transport->url) + 11);
455 sprintf(refs_url, "%s/info/refs", transport->url);
456
457 http_init();
458
459 slot = get_active_slot();
460 slot->results = &results;
461 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
462 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
463 curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
464 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
465 if (start_active_slot(slot)) {
466 run_active_slot(slot);
467 if (results.curl_result != CURLE_OK) {
468 if (missing_target(&results)) {
469 free(buffer.buffer);
470 return NULL;
471 } else {
472 free(buffer.buffer);
473 error("%s", curl_errorstr);
474 return NULL;
475 }
476 }
477 } else {
478 free(buffer.buffer);
479 error("Unable to start request");
480 return NULL;
481 }
482
483 http_cleanup();
484
485 data = buffer.buffer;
486 start = NULL;
487 mid = data;
488 while (i < buffer.posn) {
489 if (!start)
490 start = &data[i];
491 if (data[i] == '\t')
492 mid = &data[i];
493 if (data[i] == '\n') {
494 data[i] = 0;
495 ref_name = mid + 1;
496 ref = xmalloc(sizeof(struct ref) +
497 strlen(ref_name) + 1);
498 memset(ref, 0, sizeof(struct ref));
499 strcpy(ref->name, ref_name);
500 get_sha1_hex(start, ref->old_sha1);
501 if (!refs)
502 refs = ref;
503 if (last_ref)
504 last_ref->next = ref;
505 last_ref = ref;
506 start = NULL;
507 }
508 i++;
509 }
510
511 free(buffer.buffer);
512
513 return refs;
514 }
515
516 static int fetch_objs_via_curl(struct transport *transport,
517 int nr_objs, struct ref **to_fetch)
518 {
519 if (!transport->data)
520 transport->data = get_http_walker(transport->url);
521 return fetch_objs_via_walker(transport, nr_objs, to_fetch);
522 }
523
524 #endif
525
526 struct bundle_transport_data {
527 int fd;
528 struct bundle_header header;
529 };
530
531 static struct ref *get_refs_from_bundle(struct transport *transport)
532 {
533 struct bundle_transport_data *data = transport->data;
534 struct ref *result = NULL;
535 int i;
536
537 if (data->fd > 0)
538 close(data->fd);
539 data->fd = read_bundle_header(transport->url, &data->header);
540 if (data->fd < 0)
541 die ("Could not read bundle '%s'.", transport->url);
542 for (i = 0; i < data->header.references.nr; i++) {
543 struct ref_list_entry *e = data->header.references.list + i;
544 struct ref *ref = alloc_ref(strlen(e->name) + 1);
545 hashcpy(ref->old_sha1, e->sha1);
546 strcpy(ref->name, e->name);
547 ref->next = result;
548 result = ref;
549 }
550 return result;
551 }
552
553 static int fetch_refs_from_bundle(struct transport *transport,
554 int nr_heads, struct ref **to_fetch)
555 {
556 struct bundle_transport_data *data = transport->data;
557 return unbundle(&data->header, data->fd);
558 }
559
560 static int close_bundle(struct transport *transport)
561 {
562 struct bundle_transport_data *data = transport->data;
563 if (data->fd > 0)
564 close(data->fd);
565 free(data);
566 return 0;
567 }
568
569 struct git_transport_data {
570 unsigned thin : 1;
571 unsigned keep : 1;
572 int depth;
573 const char *uploadpack;
574 const char *receivepack;
575 };
576
577 static int set_git_option(struct transport *connection,
578 const char *name, const char *value)
579 {
580 struct git_transport_data *data = connection->data;
581 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
582 data->uploadpack = value;
583 return 0;
584 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
585 data->receivepack = value;
586 return 0;
587 } else if (!strcmp(name, TRANS_OPT_THIN)) {
588 data->thin = !!value;
589 return 0;
590 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
591 data->keep = !!value;
592 return 0;
593 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
594 if (!value)
595 data->depth = 0;
596 else
597 data->depth = atoi(value);
598 return 0;
599 }
600 return 1;
601 }
602
603 static struct ref *get_refs_via_connect(struct transport *transport)
604 {
605 struct git_transport_data *data = transport->data;
606 struct ref *refs;
607 int fd[2];
608 char *dest = xstrdup(transport->url);
609 struct child_process *conn = git_connect(fd, dest, data->uploadpack, 0);
610
611 get_remote_heads(fd[0], &refs, 0, NULL, 0);
612 packet_flush(fd[1]);
613
614 finish_connect(conn);
615
616 free(dest);
617
618 return refs;
619 }
620
621 static int fetch_refs_via_pack(struct transport *transport,
622 int nr_heads, struct ref **to_fetch)
623 {
624 struct git_transport_data *data = transport->data;
625 char **heads = xmalloc(nr_heads * sizeof(*heads));
626 char **origh = xmalloc(nr_heads * sizeof(*origh));
627 struct ref *refs;
628 char *dest = xstrdup(transport->url);
629 struct fetch_pack_args args;
630 int i;
631
632 memset(&args, 0, sizeof(args));
633 args.uploadpack = data->uploadpack;
634 args.keep_pack = data->keep;
635 args.lock_pack = 1;
636 args.use_thin_pack = data->thin;
637 args.verbose = transport->verbose > 0;
638 args.depth = data->depth;
639
640 for (i = 0; i < nr_heads; i++)
641 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
642 refs = fetch_pack(&args, dest, nr_heads, heads, &transport->pack_lockfile);
643
644 for (i = 0; i < nr_heads; i++)
645 free(origh[i]);
646 free(origh);
647 free(heads);
648 free_refs(refs);
649 free(dest);
650 return 0;
651 }
652
653 static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
654 {
655 struct git_transport_data *data = transport->data;
656 struct send_pack_args args;
657
658 args.receivepack = data->receivepack;
659 args.send_all = !!(flags & TRANSPORT_PUSH_ALL);
660 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
661 args.use_thin_pack = data->thin;
662 args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
663 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
664
665 return send_pack(&args, transport->url, transport->remote, refspec_nr, refspec);
666 }
667
668 static int disconnect_git(struct transport *transport)
669 {
670 free(transport->data);
671 return 0;
672 }
673
674 static int is_local(const char *url)
675 {
676 const char *colon = strchr(url, ':');
677 const char *slash = strchr(url, '/');
678 return !colon || (slash && slash < colon);
679 }
680
681 static int is_file(const char *url)
682 {
683 struct stat buf;
684 if (stat(url, &buf))
685 return 0;
686 return S_ISREG(buf.st_mode);
687 }
688
689 struct transport *transport_get(struct remote *remote, const char *url)
690 {
691 struct transport *ret = xcalloc(1, sizeof(*ret));
692
693 ret->remote = remote;
694 ret->url = url;
695
696 if (!prefixcmp(url, "rsync://")) {
697 ret->get_refs_list = get_refs_via_rsync;
698 ret->fetch = fetch_objs_via_rsync;
699 ret->push = rsync_transport_push;
700
701 } else if (!prefixcmp(url, "http://")
702 || !prefixcmp(url, "https://")
703 || !prefixcmp(url, "ftp://")) {
704 #ifdef NO_CURL
705 error("git was compiled without libcurl support.");
706 #else
707 ret->get_refs_list = get_refs_via_curl;
708 ret->fetch = fetch_objs_via_curl;
709 ret->push = curl_transport_push;
710 #endif
711 ret->disconnect = disconnect_walker;
712
713 } else if (is_local(url) && is_file(url)) {
714 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
715 ret->data = data;
716 ret->get_refs_list = get_refs_from_bundle;
717 ret->fetch = fetch_refs_from_bundle;
718 ret->disconnect = close_bundle;
719
720 } else {
721 struct git_transport_data *data = xcalloc(1, sizeof(*data));
722 ret->data = data;
723 ret->set_option = set_git_option;
724 ret->get_refs_list = get_refs_via_connect;
725 ret->fetch = fetch_refs_via_pack;
726 ret->push = git_transport_push;
727 ret->disconnect = disconnect_git;
728
729 data->thin = 1;
730 data->uploadpack = "git-upload-pack";
731 if (remote && remote->uploadpack)
732 data->uploadpack = remote->uploadpack;
733 data->receivepack = "git-receive-pack";
734 if (remote && remote->receivepack)
735 data->receivepack = remote->receivepack;
736 }
737
738 return ret;
739 }
740
741 int transport_set_option(struct transport *transport,
742 const char *name, const char *value)
743 {
744 if (transport->set_option)
745 return transport->set_option(transport, name, value);
746 return 1;
747 }
748
749 int transport_push(struct transport *transport,
750 int refspec_nr, const char **refspec, int flags)
751 {
752 if (!transport->push)
753 return 1;
754 return transport->push(transport, refspec_nr, refspec, flags);
755 }
756
757 const struct ref *transport_get_remote_refs(struct transport *transport)
758 {
759 if (!transport->remote_refs)
760 transport->remote_refs = transport->get_refs_list(transport);
761 return transport->remote_refs;
762 }
763
764 int transport_fetch_refs(struct transport *transport, struct ref *refs)
765 {
766 int rc;
767 int nr_heads = 0, nr_alloc = 0;
768 struct ref **heads = NULL;
769 struct ref *rm;
770
771 for (rm = refs; rm; rm = rm->next) {
772 if (rm->peer_ref &&
773 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
774 continue;
775 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
776 heads[nr_heads++] = rm;
777 }
778
779 rc = transport->fetch(transport, nr_heads, heads);
780 free(heads);
781 return rc;
782 }
783
784 void transport_unlock_pack(struct transport *transport)
785 {
786 if (transport->pack_lockfile) {
787 unlink(transport->pack_lockfile);
788 free(transport->pack_lockfile);
789 transport->pack_lockfile = NULL;
790 }
791 }
792
793 int transport_disconnect(struct transport *transport)
794 {
795 int ret = 0;
796 if (transport->disconnect)
797 ret = transport->disconnect(transport);
798 free(transport);
799 return ret;
800 }