Fix dependencies of parse-options test program
[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 {
385 const char **argv;
386 int argc;
387 int err;
388
389 argv = xmalloc((refspec_nr + 12) * sizeof(char *));
390 argv[0] = "http-push";
391 argc = 1;
392 if (flags & TRANSPORT_PUSH_ALL)
393 argv[argc++] = "--all";
394 if (flags & TRANSPORT_PUSH_FORCE)
395 argv[argc++] = "--force";
396 if (flags & TRANSPORT_PUSH_DRY_RUN)
397 argv[argc++] = "--dry-run";
398 if (flags & TRANSPORT_PUSH_VERBOSE)
399 argv[argc++] = "--verbose";
400 argv[argc++] = transport->url;
401 while (refspec_nr--)
402 argv[argc++] = *refspec++;
403 argv[argc] = NULL;
404 err = run_command_v_opt(argv, RUN_GIT_CMD);
405 switch (err) {
406 case -ERR_RUN_COMMAND_FORK:
407 error("unable to fork for %s", argv[0]);
408 case -ERR_RUN_COMMAND_EXEC:
409 error("unable to exec %s", argv[0]);
410 break;
411 case -ERR_RUN_COMMAND_WAITPID:
412 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
413 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
414 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
415 error("%s died with strange error", argv[0]);
416 }
417 return !!err;
418 }
419
420 static int missing__target(int code, int result)
421 {
422 return /* file:// URL -- do we ever use one??? */
423 (result == CURLE_FILE_COULDNT_READ_FILE) ||
424 /* http:// and https:// URL */
425 (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
426 /* ftp:// URL */
427 (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
428 ;
429 }
430
431 #define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
432
433 static struct ref *get_refs_via_curl(const struct transport *transport)
434 {
435 struct buffer buffer;
436 char *data, *start, *mid;
437 char *ref_name;
438 char *refs_url;
439 int i = 0;
440
441 struct active_request_slot *slot;
442 struct slot_results results;
443
444 struct ref *refs = NULL;
445 struct ref *ref = NULL;
446 struct ref *last_ref = NULL;
447
448 data = xmalloc(4096);
449 buffer.size = 4096;
450 buffer.posn = 0;
451 buffer.buffer = data;
452
453 refs_url = xmalloc(strlen(transport->url) + 11);
454 sprintf(refs_url, "%s/info/refs", transport->url);
455
456 http_init();
457
458 slot = get_active_slot();
459 slot->results = &results;
460 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
461 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
462 curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
463 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
464 if (start_active_slot(slot)) {
465 run_active_slot(slot);
466 if (results.curl_result != CURLE_OK) {
467 if (missing_target(&results)) {
468 free(buffer.buffer);
469 return NULL;
470 } else {
471 free(buffer.buffer);
472 error("%s", curl_errorstr);
473 return NULL;
474 }
475 }
476 } else {
477 free(buffer.buffer);
478 error("Unable to start request");
479 return NULL;
480 }
481
482 http_cleanup();
483
484 data = buffer.buffer;
485 start = NULL;
486 mid = data;
487 while (i < buffer.posn) {
488 if (!start)
489 start = &data[i];
490 if (data[i] == '\t')
491 mid = &data[i];
492 if (data[i] == '\n') {
493 data[i] = 0;
494 ref_name = mid + 1;
495 ref = xmalloc(sizeof(struct ref) +
496 strlen(ref_name) + 1);
497 memset(ref, 0, sizeof(struct ref));
498 strcpy(ref->name, ref_name);
499 get_sha1_hex(start, ref->old_sha1);
500 if (!refs)
501 refs = ref;
502 if (last_ref)
503 last_ref->next = ref;
504 last_ref = ref;
505 start = NULL;
506 }
507 i++;
508 }
509
510 free(buffer.buffer);
511
512 return refs;
513 }
514
515 static int fetch_objs_via_curl(struct transport *transport,
516 int nr_objs, struct ref **to_fetch)
517 {
518 if (!transport->data)
519 transport->data = get_http_walker(transport->url);
520 return fetch_objs_via_walker(transport, nr_objs, to_fetch);
521 }
522
523 #endif
524
525 struct bundle_transport_data {
526 int fd;
527 struct bundle_header header;
528 };
529
530 static struct ref *get_refs_from_bundle(const struct transport *transport)
531 {
532 struct bundle_transport_data *data = transport->data;
533 struct ref *result = NULL;
534 int i;
535
536 if (data->fd > 0)
537 close(data->fd);
538 data->fd = read_bundle_header(transport->url, &data->header);
539 if (data->fd < 0)
540 die ("Could not read bundle '%s'.", transport->url);
541 for (i = 0; i < data->header.references.nr; i++) {
542 struct ref_list_entry *e = data->header.references.list + i;
543 struct ref *ref = alloc_ref(strlen(e->name) + 1);
544 hashcpy(ref->old_sha1, e->sha1);
545 strcpy(ref->name, e->name);
546 ref->next = result;
547 result = ref;
548 }
549 return result;
550 }
551
552 static int fetch_refs_from_bundle(struct transport *transport,
553 int nr_heads, struct ref **to_fetch)
554 {
555 struct bundle_transport_data *data = transport->data;
556 return unbundle(&data->header, data->fd);
557 }
558
559 static int close_bundle(struct transport *transport)
560 {
561 struct bundle_transport_data *data = transport->data;
562 if (data->fd > 0)
563 close(data->fd);
564 free(data);
565 return 0;
566 }
567
568 struct git_transport_data {
569 unsigned thin : 1;
570 unsigned keep : 1;
571 int depth;
572 const char *uploadpack;
573 const char *receivepack;
574 };
575
576 static int set_git_option(struct transport *connection,
577 const char *name, const char *value)
578 {
579 struct git_transport_data *data = connection->data;
580 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
581 data->uploadpack = value;
582 return 0;
583 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
584 data->receivepack = value;
585 return 0;
586 } else if (!strcmp(name, TRANS_OPT_THIN)) {
587 data->thin = !!value;
588 return 0;
589 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
590 data->keep = !!value;
591 return 0;
592 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
593 if (!value)
594 data->depth = 0;
595 else
596 data->depth = atoi(value);
597 return 0;
598 }
599 return 1;
600 }
601
602 static struct ref *get_refs_via_connect(const struct transport *transport)
603 {
604 struct git_transport_data *data = transport->data;
605 struct ref *refs;
606 int fd[2];
607 char *dest = xstrdup(transport->url);
608 struct child_process *conn = git_connect(fd, dest, data->uploadpack, 0);
609
610 get_remote_heads(fd[0], &refs, 0, NULL, 0);
611 packet_flush(fd[1]);
612
613 finish_connect(conn);
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 {
654 struct git_transport_data *data = transport->data;
655 const char **argv;
656 char *rem;
657 int argc;
658 int err;
659
660 argv = xmalloc((refspec_nr + 12) * sizeof(char *));
661 argv[0] = "send-pack";
662 argc = 1;
663 if (flags & TRANSPORT_PUSH_ALL)
664 argv[argc++] = "--all";
665 if (flags & TRANSPORT_PUSH_FORCE)
666 argv[argc++] = "--force";
667 if (flags & TRANSPORT_PUSH_DRY_RUN)
668 argv[argc++] = "--dry-run";
669 if (flags & TRANSPORT_PUSH_VERBOSE)
670 argv[argc++] = "--verbose";
671 if (data->receivepack) {
672 char *rp = xmalloc(strlen(data->receivepack) + 16);
673 sprintf(rp, "--receive-pack=%s", data->receivepack);
674 argv[argc++] = rp;
675 }
676 if (data->thin)
677 argv[argc++] = "--thin";
678 rem = xmalloc(strlen(transport->remote->name) + 10);
679 sprintf(rem, "--remote=%s", transport->remote->name);
680 argv[argc++] = rem;
681 argv[argc++] = transport->url;
682 while (refspec_nr--)
683 argv[argc++] = *refspec++;
684 argv[argc] = NULL;
685 err = run_command_v_opt(argv, RUN_GIT_CMD);
686 switch (err) {
687 case -ERR_RUN_COMMAND_FORK:
688 error("unable to fork for %s", argv[0]);
689 case -ERR_RUN_COMMAND_EXEC:
690 error("unable to exec %s", argv[0]);
691 break;
692 case -ERR_RUN_COMMAND_WAITPID:
693 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
694 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
695 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
696 error("%s died with strange error", argv[0]);
697 }
698 return !!err;
699 }
700
701 static int disconnect_git(struct transport *transport)
702 {
703 free(transport->data);
704 return 0;
705 }
706
707 static int is_local(const char *url)
708 {
709 const char *colon = strchr(url, ':');
710 const char *slash = strchr(url, '/');
711 return !colon || (slash && slash < colon);
712 }
713
714 static int is_file(const char *url)
715 {
716 struct stat buf;
717 if (stat(url, &buf))
718 return 0;
719 return S_ISREG(buf.st_mode);
720 }
721
722 struct transport *transport_get(struct remote *remote, const char *url)
723 {
724 struct transport *ret = xcalloc(1, sizeof(*ret));
725
726 ret->remote = remote;
727 ret->url = url;
728
729 if (!prefixcmp(url, "rsync://")) {
730 ret->get_refs_list = get_refs_via_rsync;
731 ret->fetch = fetch_objs_via_rsync;
732 ret->push = rsync_transport_push;
733
734 } else if (!prefixcmp(url, "http://")
735 || !prefixcmp(url, "https://")
736 || !prefixcmp(url, "ftp://")) {
737 #ifdef NO_CURL
738 error("git was compiled without libcurl support.");
739 #else
740 ret->get_refs_list = get_refs_via_curl;
741 ret->fetch = fetch_objs_via_curl;
742 ret->push = curl_transport_push;
743 #endif
744 ret->disconnect = disconnect_walker;
745
746 } else if (is_local(url) && is_file(url)) {
747 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
748 ret->data = data;
749 ret->get_refs_list = get_refs_from_bundle;
750 ret->fetch = fetch_refs_from_bundle;
751 ret->disconnect = close_bundle;
752
753 } else {
754 struct git_transport_data *data = xcalloc(1, sizeof(*data));
755 ret->data = data;
756 ret->set_option = set_git_option;
757 ret->get_refs_list = get_refs_via_connect;
758 ret->fetch = fetch_refs_via_pack;
759 ret->push = git_transport_push;
760 ret->disconnect = disconnect_git;
761
762 data->thin = 1;
763 data->uploadpack = "git-upload-pack";
764 if (remote && remote->uploadpack)
765 data->uploadpack = remote->uploadpack;
766 data->receivepack = "git-receive-pack";
767 if (remote && remote->receivepack)
768 data->receivepack = remote->receivepack;
769 }
770
771 return ret;
772 }
773
774 int transport_set_option(struct transport *transport,
775 const char *name, const char *value)
776 {
777 if (transport->set_option)
778 return transport->set_option(transport, name, value);
779 return 1;
780 }
781
782 int transport_push(struct transport *transport,
783 int refspec_nr, const char **refspec, int flags)
784 {
785 if (!transport->push)
786 return 1;
787 return transport->push(transport, refspec_nr, refspec, flags);
788 }
789
790 struct ref *transport_get_remote_refs(struct transport *transport)
791 {
792 if (!transport->remote_refs)
793 transport->remote_refs = transport->get_refs_list(transport);
794 return transport->remote_refs;
795 }
796
797 int transport_fetch_refs(struct transport *transport, struct ref *refs)
798 {
799 int rc;
800 int nr_heads = 0, nr_alloc = 0;
801 struct ref **heads = NULL;
802 struct ref *rm;
803
804 for (rm = refs; rm; rm = rm->next) {
805 if (rm->peer_ref &&
806 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
807 continue;
808 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
809 heads[nr_heads++] = rm;
810 }
811
812 rc = transport->fetch(transport, nr_heads, heads);
813 free(heads);
814 return rc;
815 }
816
817 void transport_unlock_pack(struct transport *transport)
818 {
819 if (transport->pack_lockfile) {
820 unlink(transport->pack_lockfile);
821 free(transport->pack_lockfile);
822 transport->pack_lockfile = NULL;
823 }
824 }
825
826 int transport_disconnect(struct transport *transport)
827 {
828 int ret = 0;
829 if (transport->disconnect)
830 ret = transport->disconnect(transport);
831 free(transport);
832 return ret;
833 }