Support 'push --dry-run' for rsync transport
[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 "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13
14 /* rsync support */
15
16 /*
17 * We copy packed-refs and refs/ into a temporary file, then read the
18 * loose refs recursively (sorting whenever possible), and then inserting
19 * those packed refs that are not yet in the list (not validating, but
20 * assuming that the file is sorted).
21 *
22 * Appears refactoring this from refs.c is too cumbersome.
23 */
24
25 static int str_cmp(const void *a, const void *b)
26 {
27 const char *s1 = a;
28 const char *s2 = b;
29
30 return strcmp(s1, s2);
31 }
32
33 /* path->buf + name_offset is expected to point to "refs/" */
34
35 static int read_loose_refs(struct strbuf *path, int name_offset,
36 struct ref **tail)
37 {
38 DIR *dir = opendir(path->buf);
39 struct dirent *de;
40 struct {
41 char **entries;
42 int nr, alloc;
43 } list;
44 int i, pathlen;
45
46 if (!dir)
47 return -1;
48
49 memset (&list, 0, sizeof(list));
50
51 while ((de = readdir(dir))) {
52 if (de->d_name[0] == '.' && (de->d_name[1] == '\0' ||
53 (de->d_name[1] == '.' &&
54 de->d_name[2] == '\0')))
55 continue;
56 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
57 list.entries[list.nr++] = xstrdup(de->d_name);
58 }
59 closedir(dir);
60
61 /* sort the list */
62
63 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
64
65 pathlen = path->len;
66 strbuf_addch(path, '/');
67
68 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
69 strbuf_addstr(path, list.entries[i]);
70 if (read_loose_refs(path, name_offset, tail)) {
71 int fd = open(path->buf, O_RDONLY);
72 char buffer[40];
73 struct ref *next;
74
75 if (fd < 0)
76 continue;
77 next = alloc_ref(path->len - name_offset + 1);
78 if (read_in_full(fd, buffer, 40) != 40 ||
79 get_sha1_hex(buffer, next->old_sha1)) {
80 close(fd);
81 free(next);
82 continue;
83 }
84 close(fd);
85 strcpy(next->name, path->buf + name_offset);
86 (*tail)->next = next;
87 *tail = next;
88 }
89 }
90 strbuf_setlen(path, pathlen);
91
92 for (i = 0; i < list.nr; i++)
93 free(list.entries[i]);
94 free(list.entries);
95
96 return 0;
97 }
98
99 /* insert the packed refs for which no loose refs were found */
100
101 static void insert_packed_refs(const char *packed_refs, struct ref **list)
102 {
103 FILE *f = fopen(packed_refs, "r");
104 static char buffer[PATH_MAX];
105
106 if (!f)
107 return;
108
109 for (;;) {
110 int cmp, len;
111
112 if (!fgets(buffer, sizeof(buffer), f)) {
113 fclose(f);
114 return;
115 }
116
117 if (hexval(buffer[0]) > 0xf)
118 continue;
119 len = strlen(buffer);
120 if (buffer[len - 1] == '\n')
121 buffer[--len] = '\0';
122 if (len < 41)
123 continue;
124 while ((*list)->next &&
125 (cmp = strcmp(buffer + 41,
126 (*list)->next->name)) > 0)
127 list = &(*list)->next;
128 if (!(*list)->next || cmp < 0) {
129 struct ref *next = alloc_ref(len - 40);
130 buffer[40] = '\0';
131 if (get_sha1_hex(buffer, next->old_sha1)) {
132 warning ("invalid SHA-1: %s", buffer);
133 free(next);
134 continue;
135 }
136 strcpy(next->name, buffer + 41);
137 next->next = (*list)->next;
138 (*list)->next = next;
139 list = &(*list)->next;
140 }
141 }
142 }
143
144 static struct ref *get_refs_via_rsync(const struct transport *transport)
145 {
146 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
147 struct ref dummy, *tail = &dummy;
148 struct child_process rsync;
149 const char *args[5];
150 int temp_dir_len;
151
152 /* copy the refs to the temporary directory */
153
154 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
155 if (!mkdtemp(temp_dir.buf))
156 die ("Could not make temporary directory");
157 temp_dir_len = temp_dir.len;
158
159 strbuf_addstr(&buf, transport->url);
160 strbuf_addstr(&buf, "/refs");
161
162 memset(&rsync, 0, sizeof(rsync));
163 rsync.argv = args;
164 rsync.stdout_to_stderr = 1;
165 args[0] = "rsync";
166 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
167 args[2] = buf.buf;
168 args[3] = temp_dir.buf;
169 args[4] = NULL;
170
171 if (run_command(&rsync))
172 die ("Could not run rsync to get refs");
173
174 strbuf_reset(&buf);
175 strbuf_addstr(&buf, transport->url);
176 strbuf_addstr(&buf, "/packed-refs");
177
178 args[2] = buf.buf;
179
180 if (run_command(&rsync))
181 die ("Could not run rsync to get refs");
182
183 /* read the copied refs */
184
185 strbuf_addstr(&temp_dir, "/refs");
186 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
187 strbuf_setlen(&temp_dir, temp_dir_len);
188
189 tail = &dummy;
190 strbuf_addstr(&temp_dir, "/packed-refs");
191 insert_packed_refs(temp_dir.buf, &tail);
192 strbuf_setlen(&temp_dir, temp_dir_len);
193
194 if (remove_dir_recursively(&temp_dir, 0))
195 warning ("Error removing temporary directory %s.",
196 temp_dir.buf);
197
198 strbuf_release(&buf);
199 strbuf_release(&temp_dir);
200
201 return dummy.next;
202 }
203
204 static int fetch_objs_via_rsync(struct transport *transport,
205 int nr_objs, struct ref **to_fetch)
206 {
207 struct strbuf buf = STRBUF_INIT;
208 struct child_process rsync;
209 const char *args[8];
210 int result;
211
212 strbuf_addstr(&buf, transport->url);
213 strbuf_addstr(&buf, "/objects/");
214
215 memset(&rsync, 0, sizeof(rsync));
216 rsync.argv = args;
217 rsync.stdout_to_stderr = 1;
218 args[0] = "rsync";
219 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
220 args[2] = "--ignore-existing";
221 args[3] = "--exclude";
222 args[4] = "info";
223 args[5] = buf.buf;
224 args[6] = get_object_directory();
225 args[7] = NULL;
226
227 /* NEEDSWORK: handle one level of alternates */
228 result = run_command(&rsync);
229
230 strbuf_release(&buf);
231
232 return result;
233 }
234
235 static int write_one_ref(const char *name, const unsigned char *sha1,
236 int flags, void *data)
237 {
238 struct strbuf *buf = data;
239 int len = buf->len;
240 FILE *f;
241
242 /* when called via for_each_ref(), flags is non-zero */
243 if (flags && prefixcmp(name, "refs/heads/") &&
244 prefixcmp(name, "refs/tags/"))
245 return 0;
246
247 strbuf_addstr(buf, name);
248 if (safe_create_leading_directories(buf->buf) ||
249 !(f = fopen(buf->buf, "w")) ||
250 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
251 fclose(f))
252 return error("problems writing temporary file %s", buf->buf);
253 strbuf_setlen(buf, len);
254 return 0;
255 }
256
257 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
258 int refspec_nr, const char **refspec)
259 {
260 int i;
261
262 for (i = 0; i < refspec_nr; i++) {
263 unsigned char sha1[20];
264 char *ref;
265
266 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
267 return error("Could not get ref %s", refspec[i]);
268
269 if (write_one_ref(ref, sha1, 0, temp_dir)) {
270 free(ref);
271 return -1;
272 }
273 free(ref);
274 }
275 return 0;
276 }
277
278 static int rsync_transport_push(struct transport *transport,
279 int refspec_nr, const char **refspec, int flags)
280 {
281 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
282 int result = 0, i;
283 struct child_process rsync;
284 const char *args[10];
285
286 /* first push the objects */
287
288 strbuf_addstr(&buf, transport->url);
289 strbuf_addch(&buf, '/');
290
291 memset(&rsync, 0, sizeof(rsync));
292 rsync.argv = args;
293 rsync.stdout_to_stderr = 1;
294 i = 0;
295 args[i++] = "rsync";
296 args[i++] = "-a";
297 if (flags & TRANSPORT_PUSH_DRY_RUN)
298 args[i++] = "--dry-run";
299 if (transport->verbose > 0)
300 args[i++] = "-v";
301 args[i++] = "--ignore-existing";
302 args[i++] = "--exclude";
303 args[i++] = "info";
304 args[i++] = get_object_directory();
305 args[i++] = buf.buf;
306 args[i++] = NULL;
307
308 if (run_command(&rsync))
309 return error("Could not push objects to %s", transport->url);
310
311 /* copy the refs to the temporary directory; they could be packed. */
312
313 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
314 if (!mkdtemp(temp_dir.buf))
315 die ("Could not make temporary directory");
316 strbuf_addch(&temp_dir, '/');
317
318 if (flags & TRANSPORT_PUSH_ALL) {
319 if (for_each_ref(write_one_ref, &temp_dir))
320 return -1;
321 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
322 return -1;
323
324 i = 2;
325 if (flags & TRANSPORT_PUSH_DRY_RUN)
326 args[i++] = "--dry-run";
327 if (!(flags & TRANSPORT_PUSH_FORCE))
328 args[i++] = "--ignore-existing";
329 args[i++] = temp_dir.buf;
330 args[i++] = transport->url;
331 args[i++] = NULL;
332 if (run_command(&rsync))
333 result = error("Could not push to %s", transport->url);
334
335 if (remove_dir_recursively(&temp_dir, 0))
336 warning ("Could not remove temporary directory %s.",
337 temp_dir.buf);
338
339 strbuf_release(&buf);
340 strbuf_release(&temp_dir);
341
342 return result;
343 }
344
345 /* Generic functions for using commit walkers */
346
347 static int fetch_objs_via_walker(struct transport *transport,
348 int nr_objs, struct ref **to_fetch)
349 {
350 char *dest = xstrdup(transport->url);
351 struct walker *walker = transport->data;
352 char **objs = xmalloc(nr_objs * sizeof(*objs));
353 int i;
354
355 walker->get_all = 1;
356 walker->get_tree = 1;
357 walker->get_history = 1;
358 walker->get_verbosely = transport->verbose >= 0;
359 walker->get_recover = 0;
360
361 for (i = 0; i < nr_objs; i++)
362 objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
363
364 if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
365 die("Fetch failed.");
366
367 for (i = 0; i < nr_objs; i++)
368 free(objs[i]);
369 free(objs);
370 free(dest);
371 return 0;
372 }
373
374 static int disconnect_walker(struct transport *transport)
375 {
376 struct walker *walker = transport->data;
377 if (walker)
378 walker_free(walker);
379 return 0;
380 }
381
382 #ifndef NO_CURL
383 static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags) {
384 const char **argv;
385 int argc;
386 int err;
387
388 argv = xmalloc((refspec_nr + 11) * sizeof(char *));
389 argv[0] = "http-push";
390 argc = 1;
391 if (flags & TRANSPORT_PUSH_ALL)
392 argv[argc++] = "--all";
393 if (flags & TRANSPORT_PUSH_FORCE)
394 argv[argc++] = "--force";
395 argv[argc++] = transport->url;
396 while (refspec_nr--)
397 argv[argc++] = *refspec++;
398 argv[argc] = NULL;
399 err = run_command_v_opt(argv, RUN_GIT_CMD);
400 switch (err) {
401 case -ERR_RUN_COMMAND_FORK:
402 error("unable to fork for %s", argv[0]);
403 case -ERR_RUN_COMMAND_EXEC:
404 error("unable to exec %s", argv[0]);
405 break;
406 case -ERR_RUN_COMMAND_WAITPID:
407 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
408 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
409 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
410 error("%s died with strange error", argv[0]);
411 }
412 return !!err;
413 }
414
415 static int missing__target(int code, int result)
416 {
417 return /* file:// URL -- do we ever use one??? */
418 (result == CURLE_FILE_COULDNT_READ_FILE) ||
419 /* http:// and https:// URL */
420 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
421 /* ftp:// URL */
422 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
423 ;
424 }
425
426 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
427
428 static struct ref *get_refs_via_curl(const struct transport *transport)
429 {
430 struct buffer buffer;
431 char *data, *start, *mid;
432 char *ref_name;
433 char *refs_url;
434 int i = 0;
435
436 struct active_request_slot *slot;
437 struct slot_results results;
438
439 struct ref *refs = NULL;
440 struct ref *ref = NULL;
441 struct ref *last_ref = NULL;
442
443 data = xmalloc(4096);
444 buffer.size = 4096;
445 buffer.posn = 0;
446 buffer.buffer = data;
447
448 refs_url = xmalloc(strlen(transport->url) + 11);
449 sprintf(refs_url, "%s/info/refs", transport->url);
450
451 http_init();
452
453 slot = get_active_slot();
454 slot->results = &results;
455 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
456 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
457 curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
458 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
459 if (start_active_slot(slot)) {
460 run_active_slot(slot);
461 if (results.curl_result != CURLE_OK) {
462 if (missing_target(&results)) {
463 free(buffer.buffer);
464 return NULL;
465 } else {
466 free(buffer.buffer);
467 error("%s", curl_errorstr);
468 return NULL;
469 }
470 }
471 } else {
472 free(buffer.buffer);
473 error("Unable to start request");
474 return NULL;
475 }
476
477 http_cleanup();
478
479 data = buffer.buffer;
480 start = NULL;
481 mid = data;
482 while (i < buffer.posn) {
483 if (!start)
484 start = &data[i];
485 if (data[i] == '\t')
486 mid = &data[i];
487 if (data[i] == '\n') {
488 data[i] = 0;
489 ref_name = mid + 1;
490 ref = xmalloc(sizeof(struct ref) +
491 strlen(ref_name) + 1);
492 memset(ref, 0, sizeof(struct ref));
493 strcpy(ref->name, ref_name);
494 get_sha1_hex(start, ref->old_sha1);
495 if (!refs)
496 refs = ref;
497 if (last_ref)
498 last_ref->next = ref;
499 last_ref = ref;
500 start = NULL;
501 }
502 i++;
503 }
504
505 free(buffer.buffer);
506
507 return refs;
508 }
509
510 static int fetch_objs_via_curl(struct transport *transport,
511 int nr_objs, struct ref **to_fetch)
512 {
513 if (!transport->data)
514 transport->data = get_http_walker(transport->url);
515 return fetch_objs_via_walker(transport, nr_objs, to_fetch);
516 }
517
518 #endif
519
520 struct bundle_transport_data {
521 int fd;
522 struct bundle_header header;
523 };
524
525 static struct ref *get_refs_from_bundle(const struct transport *transport)
526 {
527 struct bundle_transport_data *data = transport->data;
528 struct ref *result = NULL;
529 int i;
530
531 if (data->fd > 0)
532 close(data->fd);
533 data->fd = read_bundle_header(transport->url, &data->header);
534 if (data->fd < 0)
535 die ("Could not read bundle '%s'.", transport->url);
536 for (i = 0; i < data->header.references.nr; i++) {
537 struct ref_list_entry *e = data->header.references.list + i;
538 struct ref *ref = alloc_ref(strlen(e->name) + 1);
539 hashcpy(ref->old_sha1, e->sha1);
540 strcpy(ref->name, e->name);
541 ref->next = result;
542 result = ref;
543 }
544 return result;
545 }
546
547 static int fetch_refs_from_bundle(struct transport *transport,
548 int nr_heads, struct ref **to_fetch)
549 {
550 struct bundle_transport_data *data = transport->data;
551 return unbundle(&data->header, data->fd);
552 }
553
554 static int close_bundle(struct transport *transport)
555 {
556 struct bundle_transport_data *data = transport->data;
557 if (data->fd > 0)
558 close(data->fd);
559 free(data);
560 return 0;
561 }
562
563 struct git_transport_data {
564 unsigned thin : 1;
565 unsigned keep : 1;
566 int depth;
567 const char *uploadpack;
568 const char *receivepack;
569 };
570
571 static int set_git_option(struct transport *connection,
572 const char *name, const char *value)
573 {
574 struct git_transport_data *data = connection->data;
575 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
576 data->uploadpack = value;
577 return 0;
578 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
579 data->receivepack = value;
580 return 0;
581 } else if (!strcmp(name, TRANS_OPT_THIN)) {
582 data->thin = !!value;
583 return 0;
584 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
585 data->keep = !!value;
586 return 0;
587 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
588 if (!value)
589 data->depth = 0;
590 else
591 data->depth = atoi(value);
592 return 0;
593 }
594 return 1;
595 }
596
597 static struct ref *get_refs_via_connect(const struct transport *transport)
598 {
599 struct git_transport_data *data = transport->data;
600 struct ref *refs;
601 int fd[2];
602 pid_t pid;
603 char *dest = xstrdup(transport->url);
604
605 pid = git_connect(fd, dest, data->uploadpack, 0);
606
607 if (pid < 0)
608 die("Failed to connect to \"%s\"", transport->url);
609
610 get_remote_heads(fd[0], &refs, 0, NULL, 0);
611 packet_flush(fd[1]);
612
613 finish_connect(pid);
614
615 free(dest);
616
617 return refs;
618 }
619
620 static int fetch_refs_via_pack(struct transport *transport,
621 int nr_heads, struct ref **to_fetch)
622 {
623 struct git_transport_data *data = transport->data;
624 char **heads = xmalloc(nr_heads * sizeof(*heads));
625 char **origh = xmalloc(nr_heads * sizeof(*origh));
626 struct ref *refs;
627 char *dest = xstrdup(transport->url);
628 struct fetch_pack_args args;
629 int i;
630
631 memset(&args, 0, sizeof(args));
632 args.uploadpack = data->uploadpack;
633 args.keep_pack = data->keep;
634 args.lock_pack = 1;
635 args.use_thin_pack = data->thin;
636 args.verbose = transport->verbose > 0;
637 args.depth = data->depth;
638
639 for (i = 0; i < nr_heads; i++)
640 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
641 refs = fetch_pack(&args, dest, nr_heads, heads, &transport->pack_lockfile);
642
643 for (i = 0; i < nr_heads; i++)
644 free(origh[i]);
645 free(origh);
646 free(heads);
647 free_refs(refs);
648 free(dest);
649 return 0;
650 }
651
652 static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags) {
653 struct git_transport_data *data = transport->data;
654 const char **argv;
655 char *rem;
656 int argc;
657 int err;
658
659 argv = xmalloc((refspec_nr + 11) * sizeof(char *));
660 argv[0] = "send-pack";
661 argc = 1;
662 if (flags & TRANSPORT_PUSH_ALL)
663 argv[argc++] = "--all";
664 if (flags & TRANSPORT_PUSH_FORCE)
665 argv[argc++] = "--force";
666 if (flags & TRANSPORT_PUSH_DRY_RUN)
667 argv[argc++] = "--dry-run";
668 if (data->receivepack) {
669 char *rp = xmalloc(strlen(data->receivepack) + 16);
670 sprintf(rp, "--receive-pack=%s", data->receivepack);
671 argv[argc++] = rp;
672 }
673 if (data->thin)
674 argv[argc++] = "--thin";
675 rem = xmalloc(strlen(transport->remote->name) + 10);
676 sprintf(rem, "--remote=%s", transport->remote->name);
677 argv[argc++] = rem;
678 argv[argc++] = transport->url;
679 while (refspec_nr--)
680 argv[argc++] = *refspec++;
681 argv[argc] = NULL;
682 err = run_command_v_opt(argv, RUN_GIT_CMD);
683 switch (err) {
684 case -ERR_RUN_COMMAND_FORK:
685 error("unable to fork for %s", argv[0]);
686 case -ERR_RUN_COMMAND_EXEC:
687 error("unable to exec %s", argv[0]);
688 break;
689 case -ERR_RUN_COMMAND_WAITPID:
690 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
691 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
692 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
693 error("%s died with strange error", argv[0]);
694 }
695 return !!err;
696 }
697
698 static int disconnect_git(struct transport *transport)
699 {
700 free(transport->data);
701 return 0;
702 }
703
704 static int is_local(const char *url)
705 {
706 const char *colon = strchr(url, ':');
707 const char *slash = strchr(url, '/');
708 return !colon || (slash && slash < colon);
709 }
710
711 static int is_file(const char *url)
712 {
713 struct stat buf;
714 if (stat(url, &buf))
715 return 0;
716 return S_ISREG(buf.st_mode);
717 }
718
719 struct transport *transport_get(struct remote *remote, const char *url)
720 {
721 struct transport *ret = xcalloc(1, sizeof(*ret));
722
723 ret->remote = remote;
724 ret->url = url;
725
726 if (!prefixcmp(url, "rsync://")) {
727 ret->get_refs_list = get_refs_via_rsync;
728 ret->fetch = fetch_objs_via_rsync;
729 ret->push = rsync_transport_push;
730
731 } else if (!prefixcmp(url, "http://")
732 || !prefixcmp(url, "https://")
733 || !prefixcmp(url, "ftp://")) {
734 #ifdef NO_CURL
735 error("git was compiled without libcurl support.");
736 #else
737 ret->get_refs_list = get_refs_via_curl;
738 ret->fetch = fetch_objs_via_curl;
739 ret->push = curl_transport_push;
740 #endif
741 ret->disconnect = disconnect_walker;
742
743 } else if (is_local(url) && is_file(url)) {
744 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
745 ret->data = data;
746 ret->get_refs_list = get_refs_from_bundle;
747 ret->fetch = fetch_refs_from_bundle;
748 ret->disconnect = close_bundle;
749
750 } else {
751 struct git_transport_data *data = xcalloc(1, sizeof(*data));
752 ret->data = data;
753 ret->set_option = set_git_option;
754 ret->get_refs_list = get_refs_via_connect;
755 ret->fetch = fetch_refs_via_pack;
756 ret->push = git_transport_push;
757 ret->disconnect = disconnect_git;
758
759 data->thin = 1;
760 data->uploadpack = "git-upload-pack";
761 if (remote && remote->uploadpack)
762 data->uploadpack = remote->uploadpack;
763 data->receivepack = "git-receive-pack";
764 if (remote && remote->receivepack)
765 data->receivepack = remote->receivepack;
766 }
767
768 return ret;
769 }
770
771 int transport_set_option(struct transport *transport,
772 const char *name, const char *value)
773 {
774 if (transport->set_option)
775 return transport->set_option(transport, name, value);
776 return 1;
777 }
778
779 int transport_push(struct transport *transport,
780 int refspec_nr, const char **refspec, int flags)
781 {
782 if (!transport->push)
783 return 1;
784 return transport->push(transport, refspec_nr, refspec, flags);
785 }
786
787 struct ref *transport_get_remote_refs(struct transport *transport)
788 {
789 if (!transport->remote_refs)
790 transport->remote_refs = transport->get_refs_list(transport);
791 return transport->remote_refs;
792 }
793
794 int transport_fetch_refs(struct transport *transport, struct ref *refs)
795 {
796 int rc;
797 int nr_heads = 0, nr_alloc = 0;
798 struct ref **heads = NULL;
799 struct ref *rm;
800
801 for (rm = refs; rm; rm = rm->next) {
802 if (rm->peer_ref &&
803 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
804 continue;
805 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
806 heads[nr_heads++] = rm;
807 }
808
809 rc = transport->fetch(transport, nr_heads, heads);
810 free(heads);
811 return rc;
812 }
813
814 void transport_unlock_pack(struct transport *transport)
815 {
816 if (transport->pack_lockfile) {
817 unlink(transport->pack_lockfile);
818 free(transport->pack_lockfile);
819 transport->pack_lockfile = NULL;
820 }
821 }
822
823 int transport_disconnect(struct transport *transport)
824 {
825 int ret = 0;
826 if (transport->disconnect)
827 ret = transport->disconnect(transport);
828 free(transport);
829 return ret;
830 }