transport.c: squelch a gcc 4.0.1 complaint about an uninitialized variable
[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 = 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 if (flags & TRANSPORT_PUSH_DRY_RUN)
396 argv[argc++] = "--dry-run";
397 argv[argc++] = transport->url;
398 while (refspec_nr--)
399 argv[argc++] = *refspec++;
400 argv[argc] = NULL;
401 err = run_command_v_opt(argv, RUN_GIT_CMD);
402 switch (err) {
403 case -ERR_RUN_COMMAND_FORK:
404 error("unable to fork for %s", argv[0]);
405 case -ERR_RUN_COMMAND_EXEC:
406 error("unable to exec %s", argv[0]);
407 break;
408 case -ERR_RUN_COMMAND_WAITPID:
409 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
410 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
411 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
412 error("%s died with strange error", argv[0]);
413 }
414 return !!err;
415 }
416
417 static int missing__target(int code, int result)
418 {
419 return /* file:// URL -- do we ever use one??? */
420 (result == CURLE_FILE_COULDNT_READ_FILE) ||
421 /* http:// and https:// URL */
422 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
423 /* ftp:// URL */
424 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
425 ;
426 }
427
428 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
429
430 static struct ref *get_refs_via_curl(const struct transport *transport)
431 {
432 struct buffer buffer;
433 char *data, *start, *mid;
434 char *ref_name;
435 char *refs_url;
436 int i = 0;
437
438 struct active_request_slot *slot;
439 struct slot_results results;
440
441 struct ref *refs = NULL;
442 struct ref *ref = NULL;
443 struct ref *last_ref = NULL;
444
445 data = xmalloc(4096);
446 buffer.size = 4096;
447 buffer.posn = 0;
448 buffer.buffer = data;
449
450 refs_url = xmalloc(strlen(transport->url) + 11);
451 sprintf(refs_url, "%s/info/refs", transport->url);
452
453 http_init();
454
455 slot = get_active_slot();
456 slot->results = &results;
457 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
458 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
459 curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
460 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
461 if (start_active_slot(slot)) {
462 run_active_slot(slot);
463 if (results.curl_result != CURLE_OK) {
464 if (missing_target(&results)) {
465 free(buffer.buffer);
466 return NULL;
467 } else {
468 free(buffer.buffer);
469 error("%s", curl_errorstr);
470 return NULL;
471 }
472 }
473 } else {
474 free(buffer.buffer);
475 error("Unable to start request");
476 return NULL;
477 }
478
479 http_cleanup();
480
481 data = buffer.buffer;
482 start = NULL;
483 mid = data;
484 while (i < buffer.posn) {
485 if (!start)
486 start = &data[i];
487 if (data[i] == '\t')
488 mid = &data[i];
489 if (data[i] == '\n') {
490 data[i] = 0;
491 ref_name = mid + 1;
492 ref = xmalloc(sizeof(struct ref) +
493 strlen(ref_name) + 1);
494 memset(ref, 0, sizeof(struct ref));
495 strcpy(ref->name, ref_name);
496 get_sha1_hex(start, ref->old_sha1);
497 if (!refs)
498 refs = ref;
499 if (last_ref)
500 last_ref->next = ref;
501 last_ref = ref;
502 start = NULL;
503 }
504 i++;
505 }
506
507 free(buffer.buffer);
508
509 return refs;
510 }
511
512 static int fetch_objs_via_curl(struct transport *transport,
513 int nr_objs, struct ref **to_fetch)
514 {
515 if (!transport->data)
516 transport->data = get_http_walker(transport->url);
517 return fetch_objs_via_walker(transport, nr_objs, to_fetch);
518 }
519
520 #endif
521
522 struct bundle_transport_data {
523 int fd;
524 struct bundle_header header;
525 };
526
527 static struct ref *get_refs_from_bundle(const struct transport *transport)
528 {
529 struct bundle_transport_data *data = transport->data;
530 struct ref *result = NULL;
531 int i;
532
533 if (data->fd > 0)
534 close(data->fd);
535 data->fd = read_bundle_header(transport->url, &data->header);
536 if (data->fd < 0)
537 die ("Could not read bundle '%s'.", transport->url);
538 for (i = 0; i < data->header.references.nr; i++) {
539 struct ref_list_entry *e = data->header.references.list + i;
540 struct ref *ref = alloc_ref(strlen(e->name) + 1);
541 hashcpy(ref->old_sha1, e->sha1);
542 strcpy(ref->name, e->name);
543 ref->next = result;
544 result = ref;
545 }
546 return result;
547 }
548
549 static int fetch_refs_from_bundle(struct transport *transport,
550 int nr_heads, struct ref **to_fetch)
551 {
552 struct bundle_transport_data *data = transport->data;
553 return unbundle(&data->header, data->fd);
554 }
555
556 static int close_bundle(struct transport *transport)
557 {
558 struct bundle_transport_data *data = transport->data;
559 if (data->fd > 0)
560 close(data->fd);
561 free(data);
562 return 0;
563 }
564
565 struct git_transport_data {
566 unsigned thin : 1;
567 unsigned keep : 1;
568 int depth;
569 const char *uploadpack;
570 const char *receivepack;
571 };
572
573 static int set_git_option(struct transport *connection,
574 const char *name, const char *value)
575 {
576 struct git_transport_data *data = connection->data;
577 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
578 data->uploadpack = value;
579 return 0;
580 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
581 data->receivepack = value;
582 return 0;
583 } else if (!strcmp(name, TRANS_OPT_THIN)) {
584 data->thin = !!value;
585 return 0;
586 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
587 data->keep = !!value;
588 return 0;
589 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
590 if (!value)
591 data->depth = 0;
592 else
593 data->depth = atoi(value);
594 return 0;
595 }
596 return 1;
597 }
598
599 static struct ref *get_refs_via_connect(const struct transport *transport)
600 {
601 struct git_transport_data *data = transport->data;
602 struct ref *refs;
603 int fd[2];
604 char *dest = xstrdup(transport->url);
605 struct child_process *conn = git_connect(fd, dest, data->uploadpack, 0);
606
607 get_remote_heads(fd[0], &refs, 0, NULL, 0);
608 packet_flush(fd[1]);
609
610 finish_connect(conn);
611
612 free(dest);
613
614 return refs;
615 }
616
617 static int fetch_refs_via_pack(struct transport *transport,
618 int nr_heads, struct ref **to_fetch)
619 {
620 struct git_transport_data *data = transport->data;
621 char **heads = xmalloc(nr_heads * sizeof(*heads));
622 char **origh = xmalloc(nr_heads * sizeof(*origh));
623 struct ref *refs;
624 char *dest = xstrdup(transport->url);
625 struct fetch_pack_args args;
626 int i;
627
628 memset(&args, 0, sizeof(args));
629 args.uploadpack = data->uploadpack;
630 args.keep_pack = data->keep;
631 args.lock_pack = 1;
632 args.use_thin_pack = data->thin;
633 args.verbose = transport->verbose > 0;
634 args.depth = data->depth;
635
636 for (i = 0; i < nr_heads; i++)
637 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
638 refs = fetch_pack(&args, dest, nr_heads, heads, &transport->pack_lockfile);
639
640 for (i = 0; i < nr_heads; i++)
641 free(origh[i]);
642 free(origh);
643 free(heads);
644 free_refs(refs);
645 free(dest);
646 return 0;
647 }
648
649 static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags) {
650 struct git_transport_data *data = transport->data;
651 const char **argv;
652 char *rem;
653 int argc;
654 int err;
655
656 argv = xmalloc((refspec_nr + 11) * sizeof(char *));
657 argv[0] = "send-pack";
658 argc = 1;
659 if (flags & TRANSPORT_PUSH_ALL)
660 argv[argc++] = "--all";
661 if (flags & TRANSPORT_PUSH_FORCE)
662 argv[argc++] = "--force";
663 if (flags & TRANSPORT_PUSH_DRY_RUN)
664 argv[argc++] = "--dry-run";
665 if (data->receivepack) {
666 char *rp = xmalloc(strlen(data->receivepack) + 16);
667 sprintf(rp, "--receive-pack=%s", data->receivepack);
668 argv[argc++] = rp;
669 }
670 if (data->thin)
671 argv[argc++] = "--thin";
672 rem = xmalloc(strlen(transport->remote->name) + 10);
673 sprintf(rem, "--remote=%s", transport->remote->name);
674 argv[argc++] = rem;
675 argv[argc++] = transport->url;
676 while (refspec_nr--)
677 argv[argc++] = *refspec++;
678 argv[argc] = NULL;
679 err = run_command_v_opt(argv, RUN_GIT_CMD);
680 switch (err) {
681 case -ERR_RUN_COMMAND_FORK:
682 error("unable to fork for %s", argv[0]);
683 case -ERR_RUN_COMMAND_EXEC:
684 error("unable to exec %s", argv[0]);
685 break;
686 case -ERR_RUN_COMMAND_WAITPID:
687 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
688 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
689 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
690 error("%s died with strange error", argv[0]);
691 }
692 return !!err;
693 }
694
695 static int disconnect_git(struct transport *transport)
696 {
697 free(transport->data);
698 return 0;
699 }
700
701 static int is_local(const char *url)
702 {
703 const char *colon = strchr(url, ':');
704 const char *slash = strchr(url, '/');
705 return !colon || (slash && slash < colon);
706 }
707
708 static int is_file(const char *url)
709 {
710 struct stat buf;
711 if (stat(url, &buf))
712 return 0;
713 return S_ISREG(buf.st_mode);
714 }
715
716 struct transport *transport_get(struct remote *remote, const char *url)
717 {
718 struct transport *ret = xcalloc(1, sizeof(*ret));
719
720 ret->remote = remote;
721 ret->url = url;
722
723 if (!prefixcmp(url, "rsync://")) {
724 ret->get_refs_list = get_refs_via_rsync;
725 ret->fetch = fetch_objs_via_rsync;
726 ret->push = rsync_transport_push;
727
728 } else if (!prefixcmp(url, "http://")
729 || !prefixcmp(url, "https://")
730 || !prefixcmp(url, "ftp://")) {
731 #ifdef NO_CURL
732 error("git was compiled without libcurl support.");
733 #else
734 ret->get_refs_list = get_refs_via_curl;
735 ret->fetch = fetch_objs_via_curl;
736 ret->push = curl_transport_push;
737 #endif
738 ret->disconnect = disconnect_walker;
739
740 } else if (is_local(url) && is_file(url)) {
741 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
742 ret->data = data;
743 ret->get_refs_list = get_refs_from_bundle;
744 ret->fetch = fetch_refs_from_bundle;
745 ret->disconnect = close_bundle;
746
747 } else {
748 struct git_transport_data *data = xcalloc(1, sizeof(*data));
749 ret->data = data;
750 ret->set_option = set_git_option;
751 ret->get_refs_list = get_refs_via_connect;
752 ret->fetch = fetch_refs_via_pack;
753 ret->push = git_transport_push;
754 ret->disconnect = disconnect_git;
755
756 data->thin = 1;
757 data->uploadpack = "git-upload-pack";
758 if (remote && remote->uploadpack)
759 data->uploadpack = remote->uploadpack;
760 data->receivepack = "git-receive-pack";
761 if (remote && remote->receivepack)
762 data->receivepack = remote->receivepack;
763 }
764
765 return ret;
766 }
767
768 int transport_set_option(struct transport *transport,
769 const char *name, const char *value)
770 {
771 if (transport->set_option)
772 return transport->set_option(transport, name, value);
773 return 1;
774 }
775
776 int transport_push(struct transport *transport,
777 int refspec_nr, const char **refspec, int flags)
778 {
779 if (!transport->push)
780 return 1;
781 return transport->push(transport, refspec_nr, refspec, flags);
782 }
783
784 struct ref *transport_get_remote_refs(struct transport *transport)
785 {
786 if (!transport->remote_refs)
787 transport->remote_refs = transport->get_refs_list(transport);
788 return transport->remote_refs;
789 }
790
791 int transport_fetch_refs(struct transport *transport, struct ref *refs)
792 {
793 int rc;
794 int nr_heads = 0, nr_alloc = 0;
795 struct ref **heads = NULL;
796 struct ref *rm;
797
798 for (rm = refs; rm; rm = rm->next) {
799 if (rm->peer_ref &&
800 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
801 continue;
802 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
803 heads[nr_heads++] = rm;
804 }
805
806 rc = transport->fetch(transport, nr_heads, heads);
807 free(heads);
808 return rc;
809 }
810
811 void transport_unlock_pack(struct transport *transport)
812 {
813 if (transport->pack_lockfile) {
814 unlink(transport->pack_lockfile);
815 free(transport->pack_lockfile);
816 transport->pack_lockfile = NULL;
817 }
818 }
819
820 int transport_disconnect(struct transport *transport)
821 {
822 int ret = 0;
823 if (transport->disconnect)
824 ret = transport->disconnect(transport);
825 free(transport);
826 return ret;
827 }