Merge branch 'tc/clone-v-progress'
[git/git.git] / transport.c
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #include "pkt-line.h"
5 #include "fetch-pack.h"
6 #include "send-pack.h"
7 #include "walker.h"
8 #include "bundle.h"
9 #include "dir.h"
10 #include "refs.h"
11
12 /* rsync support */
13
14 /*
15 * We copy packed-refs and refs/ into a temporary file, then read the
16 * loose refs recursively (sorting whenever possible), and then inserting
17 * those packed refs that are not yet in the list (not validating, but
18 * assuming that the file is sorted).
19 *
20 * Appears refactoring this from refs.c is too cumbersome.
21 */
22
23 static int str_cmp(const void *a, const void *b)
24 {
25 const char *s1 = a;
26 const char *s2 = b;
27
28 return strcmp(s1, s2);
29 }
30
31 /* path->buf + name_offset is expected to point to "refs/" */
32
33 static int read_loose_refs(struct strbuf *path, int name_offset,
34 struct ref **tail)
35 {
36 DIR *dir = opendir(path->buf);
37 struct dirent *de;
38 struct {
39 char **entries;
40 int nr, alloc;
41 } list;
42 int i, pathlen;
43
44 if (!dir)
45 return -1;
46
47 memset (&list, 0, sizeof(list));
48
49 while ((de = readdir(dir))) {
50 if (is_dot_or_dotdot(de->d_name))
51 continue;
52 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
53 list.entries[list.nr++] = xstrdup(de->d_name);
54 }
55 closedir(dir);
56
57 /* sort the list */
58
59 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
60
61 pathlen = path->len;
62 strbuf_addch(path, '/');
63
64 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
65 strbuf_addstr(path, list.entries[i]);
66 if (read_loose_refs(path, name_offset, tail)) {
67 int fd = open(path->buf, O_RDONLY);
68 char buffer[40];
69 struct ref *next;
70
71 if (fd < 0)
72 continue;
73 next = alloc_ref(path->buf + name_offset);
74 if (read_in_full(fd, buffer, 40) != 40 ||
75 get_sha1_hex(buffer, next->old_sha1)) {
76 close(fd);
77 free(next);
78 continue;
79 }
80 close(fd);
81 (*tail)->next = next;
82 *tail = next;
83 }
84 }
85 strbuf_setlen(path, pathlen);
86
87 for (i = 0; i < list.nr; i++)
88 free(list.entries[i]);
89 free(list.entries);
90
91 return 0;
92 }
93
94 /* insert the packed refs for which no loose refs were found */
95
96 static void insert_packed_refs(const char *packed_refs, struct ref **list)
97 {
98 FILE *f = fopen(packed_refs, "r");
99 static char buffer[PATH_MAX];
100
101 if (!f)
102 return;
103
104 for (;;) {
105 int cmp = cmp, len;
106
107 if (!fgets(buffer, sizeof(buffer), f)) {
108 fclose(f);
109 return;
110 }
111
112 if (hexval(buffer[0]) > 0xf)
113 continue;
114 len = strlen(buffer);
115 if (len && buffer[len - 1] == '\n')
116 buffer[--len] = '\0';
117 if (len < 41)
118 continue;
119 while ((*list)->next &&
120 (cmp = strcmp(buffer + 41,
121 (*list)->next->name)) > 0)
122 list = &(*list)->next;
123 if (!(*list)->next || cmp < 0) {
124 struct ref *next = alloc_ref(buffer + 41);
125 buffer[40] = '\0';
126 if (get_sha1_hex(buffer, next->old_sha1)) {
127 warning ("invalid SHA-1: %s", buffer);
128 free(next);
129 continue;
130 }
131 next->next = (*list)->next;
132 (*list)->next = next;
133 list = &(*list)->next;
134 }
135 }
136 }
137
138 static const char *rsync_url(const char *url)
139 {
140 return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
141 }
142
143 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
144 {
145 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
146 struct ref dummy = {0}, *tail = &dummy;
147 struct child_process rsync;
148 const char *args[5];
149 int temp_dir_len;
150
151 if (for_push)
152 return NULL;
153
154 /* copy the refs to the temporary directory */
155
156 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
157 if (!mkdtemp(temp_dir.buf))
158 die_errno ("Could not make temporary directory");
159 temp_dir_len = temp_dir.len;
160
161 strbuf_addstr(&buf, rsync_url(transport->url));
162 strbuf_addstr(&buf, "/refs");
163
164 memset(&rsync, 0, sizeof(rsync));
165 rsync.argv = args;
166 rsync.stdout_to_stderr = 1;
167 args[0] = "rsync";
168 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
169 args[2] = buf.buf;
170 args[3] = temp_dir.buf;
171 args[4] = NULL;
172
173 if (run_command(&rsync))
174 die ("Could not run rsync to get refs");
175
176 strbuf_reset(&buf);
177 strbuf_addstr(&buf, rsync_url(transport->url));
178 strbuf_addstr(&buf, "/packed-refs");
179
180 args[2] = buf.buf;
181
182 if (run_command(&rsync))
183 die ("Could not run rsync to get refs");
184
185 /* read the copied refs */
186
187 strbuf_addstr(&temp_dir, "/refs");
188 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
189 strbuf_setlen(&temp_dir, temp_dir_len);
190
191 tail = &dummy;
192 strbuf_addstr(&temp_dir, "/packed-refs");
193 insert_packed_refs(temp_dir.buf, &tail);
194 strbuf_setlen(&temp_dir, temp_dir_len);
195
196 if (remove_dir_recursively(&temp_dir, 0))
197 warning ("Error removing temporary directory %s.",
198 temp_dir.buf);
199
200 strbuf_release(&buf);
201 strbuf_release(&temp_dir);
202
203 return dummy.next;
204 }
205
206 static int fetch_objs_via_rsync(struct transport *transport,
207 int nr_objs, struct ref **to_fetch)
208 {
209 struct strbuf buf = STRBUF_INIT;
210 struct child_process rsync;
211 const char *args[8];
212 int result;
213
214 strbuf_addstr(&buf, rsync_url(transport->url));
215 strbuf_addstr(&buf, "/objects/");
216
217 memset(&rsync, 0, sizeof(rsync));
218 rsync.argv = args;
219 rsync.stdout_to_stderr = 1;
220 args[0] = "rsync";
221 args[1] = (transport->verbose > 0) ? "-rv" : "-r";
222 args[2] = "--ignore-existing";
223 args[3] = "--exclude";
224 args[4] = "info";
225 args[5] = buf.buf;
226 args[6] = get_object_directory();
227 args[7] = NULL;
228
229 /* NEEDSWORK: handle one level of alternates */
230 result = run_command(&rsync);
231
232 strbuf_release(&buf);
233
234 return result;
235 }
236
237 static int write_one_ref(const char *name, const unsigned char *sha1,
238 int flags, void *data)
239 {
240 struct strbuf *buf = data;
241 int len = buf->len;
242 FILE *f;
243
244 /* when called via for_each_ref(), flags is non-zero */
245 if (flags && prefixcmp(name, "refs/heads/") &&
246 prefixcmp(name, "refs/tags/"))
247 return 0;
248
249 strbuf_addstr(buf, name);
250 if (safe_create_leading_directories(buf->buf) ||
251 !(f = fopen(buf->buf, "w")) ||
252 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
253 fclose(f))
254 return error("problems writing temporary file %s", buf->buf);
255 strbuf_setlen(buf, len);
256 return 0;
257 }
258
259 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
260 int refspec_nr, const char **refspec)
261 {
262 int i;
263
264 for (i = 0; i < refspec_nr; i++) {
265 unsigned char sha1[20];
266 char *ref;
267
268 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
269 return error("Could not get ref %s", refspec[i]);
270
271 if (write_one_ref(ref, sha1, 0, temp_dir)) {
272 free(ref);
273 return -1;
274 }
275 free(ref);
276 }
277 return 0;
278 }
279
280 static int rsync_transport_push(struct transport *transport,
281 int refspec_nr, const char **refspec, int flags)
282 {
283 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
284 int result = 0, i;
285 struct child_process rsync;
286 const char *args[10];
287
288 if (flags & TRANSPORT_PUSH_MIRROR)
289 return error("rsync transport does not support mirror mode");
290
291 /* first push the objects */
292
293 strbuf_addstr(&buf, rsync_url(transport->url));
294 strbuf_addch(&buf, '/');
295
296 memset(&rsync, 0, sizeof(rsync));
297 rsync.argv = args;
298 rsync.stdout_to_stderr = 1;
299 i = 0;
300 args[i++] = "rsync";
301 args[i++] = "-a";
302 if (flags & TRANSPORT_PUSH_DRY_RUN)
303 args[i++] = "--dry-run";
304 if (transport->verbose > 0)
305 args[i++] = "-v";
306 args[i++] = "--ignore-existing";
307 args[i++] = "--exclude";
308 args[i++] = "info";
309 args[i++] = get_object_directory();
310 args[i++] = buf.buf;
311 args[i++] = NULL;
312
313 if (run_command(&rsync))
314 return error("Could not push objects to %s",
315 rsync_url(transport->url));
316
317 /* copy the refs to the temporary directory; they could be packed. */
318
319 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
320 if (!mkdtemp(temp_dir.buf))
321 die_errno ("Could not make temporary directory");
322 strbuf_addch(&temp_dir, '/');
323
324 if (flags & TRANSPORT_PUSH_ALL) {
325 if (for_each_ref(write_one_ref, &temp_dir))
326 return -1;
327 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
328 return -1;
329
330 i = 2;
331 if (flags & TRANSPORT_PUSH_DRY_RUN)
332 args[i++] = "--dry-run";
333 if (!(flags & TRANSPORT_PUSH_FORCE))
334 args[i++] = "--ignore-existing";
335 args[i++] = temp_dir.buf;
336 args[i++] = rsync_url(transport->url);
337 args[i++] = NULL;
338 if (run_command(&rsync))
339 result = error("Could not push to %s",
340 rsync_url(transport->url));
341
342 if (remove_dir_recursively(&temp_dir, 0))
343 warning ("Could not remove temporary directory %s.",
344 temp_dir.buf);
345
346 strbuf_release(&buf);
347 strbuf_release(&temp_dir);
348
349 return result;
350 }
351
352 struct bundle_transport_data {
353 int fd;
354 struct bundle_header header;
355 };
356
357 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
358 {
359 struct bundle_transport_data *data = transport->data;
360 struct ref *result = NULL;
361 int i;
362
363 if (for_push)
364 return NULL;
365
366 if (data->fd > 0)
367 close(data->fd);
368 data->fd = read_bundle_header(transport->url, &data->header);
369 if (data->fd < 0)
370 die ("Could not read bundle '%s'.", transport->url);
371 for (i = 0; i < data->header.references.nr; i++) {
372 struct ref_list_entry *e = data->header.references.list + i;
373 struct ref *ref = alloc_ref(e->name);
374 hashcpy(ref->old_sha1, e->sha1);
375 ref->next = result;
376 result = ref;
377 }
378 return result;
379 }
380
381 static int fetch_refs_from_bundle(struct transport *transport,
382 int nr_heads, struct ref **to_fetch)
383 {
384 struct bundle_transport_data *data = transport->data;
385 return unbundle(&data->header, data->fd);
386 }
387
388 static int close_bundle(struct transport *transport)
389 {
390 struct bundle_transport_data *data = transport->data;
391 if (data->fd > 0)
392 close(data->fd);
393 free(data);
394 return 0;
395 }
396
397 struct git_transport_data {
398 struct git_transport_options options;
399 struct child_process *conn;
400 int fd[2];
401 unsigned got_remote_heads : 1;
402 struct extra_have_objects extra_have;
403 };
404
405 static int set_git_option(struct git_transport_options *opts,
406 const char *name, const char *value)
407 {
408 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
409 opts->uploadpack = value;
410 return 0;
411 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
412 opts->receivepack = value;
413 return 0;
414 } else if (!strcmp(name, TRANS_OPT_THIN)) {
415 opts->thin = !!value;
416 return 0;
417 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
418 opts->followtags = !!value;
419 return 0;
420 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
421 opts->keep = !!value;
422 return 0;
423 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
424 if (!value)
425 opts->depth = 0;
426 else
427 opts->depth = atoi(value);
428 return 0;
429 }
430 return 1;
431 }
432
433 static int connect_setup(struct transport *transport, int for_push, int verbose)
434 {
435 struct git_transport_data *data = transport->data;
436
437 if (data->conn)
438 return 0;
439
440 data->conn = git_connect(data->fd, transport->url,
441 for_push ? data->options.receivepack :
442 data->options.uploadpack,
443 verbose ? CONNECT_VERBOSE : 0);
444
445 return 0;
446 }
447
448 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
449 {
450 struct git_transport_data *data = transport->data;
451 struct ref *refs;
452
453 connect_setup(transport, for_push, 0);
454 get_remote_heads(data->fd[0], &refs, 0, NULL,
455 for_push ? REF_NORMAL : 0, &data->extra_have);
456 data->got_remote_heads = 1;
457
458 return refs;
459 }
460
461 static int fetch_refs_via_pack(struct transport *transport,
462 int nr_heads, struct ref **to_fetch)
463 {
464 struct git_transport_data *data = transport->data;
465 char **heads = xmalloc(nr_heads * sizeof(*heads));
466 char **origh = xmalloc(nr_heads * sizeof(*origh));
467 const struct ref *refs;
468 char *dest = xstrdup(transport->url);
469 struct fetch_pack_args args;
470 int i;
471 struct ref *refs_tmp = NULL;
472
473 memset(&args, 0, sizeof(args));
474 args.uploadpack = data->options.uploadpack;
475 args.keep_pack = data->options.keep;
476 args.lock_pack = 1;
477 args.use_thin_pack = data->options.thin;
478 args.include_tag = data->options.followtags;
479 args.verbose = (transport->verbose > 0);
480 args.quiet = (transport->verbose < 0);
481 args.no_progress = args.quiet || (!transport->progress && !isatty(2));
482 args.depth = data->options.depth;
483
484 for (i = 0; i < nr_heads; i++)
485 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
486
487 if (!data->got_remote_heads) {
488 connect_setup(transport, 0, 0);
489 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
490 data->got_remote_heads = 1;
491 }
492
493 refs = fetch_pack(&args, data->fd, data->conn,
494 refs_tmp ? refs_tmp : transport->remote_refs,
495 dest, nr_heads, heads, &transport->pack_lockfile);
496 close(data->fd[0]);
497 close(data->fd[1]);
498 if (finish_connect(data->conn))
499 refs = NULL;
500 data->conn = NULL;
501 data->got_remote_heads = 0;
502
503 free_refs(refs_tmp);
504
505 for (i = 0; i < nr_heads; i++)
506 free(origh[i]);
507 free(origh);
508 free(heads);
509 free(dest);
510 return (refs ? 0 : -1);
511 }
512
513 static int push_had_errors(struct ref *ref)
514 {
515 for (; ref; ref = ref->next) {
516 switch (ref->status) {
517 case REF_STATUS_NONE:
518 case REF_STATUS_UPTODATE:
519 case REF_STATUS_OK:
520 break;
521 default:
522 return 1;
523 }
524 }
525 return 0;
526 }
527
528 static int refs_pushed(struct ref *ref)
529 {
530 for (; ref; ref = ref->next) {
531 switch(ref->status) {
532 case REF_STATUS_NONE:
533 case REF_STATUS_UPTODATE:
534 break;
535 default:
536 return 1;
537 }
538 }
539 return 0;
540 }
541
542 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
543 {
544 struct refspec rs;
545
546 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
547 return;
548
549 rs.src = ref->name;
550 rs.dst = NULL;
551
552 if (!remote_find_tracking(remote, &rs)) {
553 if (verbose)
554 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
555 if (ref->deletion) {
556 delete_ref(rs.dst, NULL, 0);
557 } else
558 update_ref("update by push", rs.dst,
559 ref->new_sha1, NULL, 0, 0);
560 free(rs.dst);
561 }
562 }
563
564 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
565
566 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
567 {
568 if (porcelain) {
569 if (from)
570 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
571 else
572 fprintf(stdout, "%c\t:%s\t", flag, to->name);
573 if (msg)
574 fprintf(stdout, "%s (%s)\n", summary, msg);
575 else
576 fprintf(stdout, "%s\n", summary);
577 } else {
578 fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
579 if (from)
580 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
581 else
582 fputs(prettify_refname(to->name), stderr);
583 if (msg) {
584 fputs(" (", stderr);
585 fputs(msg, stderr);
586 fputc(')', stderr);
587 }
588 fputc('\n', stderr);
589 }
590 }
591
592 static const char *status_abbrev(unsigned char sha1[20])
593 {
594 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
595 }
596
597 static void print_ok_ref_status(struct ref *ref, int porcelain)
598 {
599 if (ref->deletion)
600 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
601 else if (is_null_sha1(ref->old_sha1))
602 print_ref_status('*',
603 (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
604 "[new branch]"),
605 ref, ref->peer_ref, NULL, porcelain);
606 else {
607 char quickref[84];
608 char type;
609 const char *msg;
610
611 strcpy(quickref, status_abbrev(ref->old_sha1));
612 if (ref->nonfastforward) {
613 strcat(quickref, "...");
614 type = '+';
615 msg = "forced update";
616 } else {
617 strcat(quickref, "..");
618 type = ' ';
619 msg = NULL;
620 }
621 strcat(quickref, status_abbrev(ref->new_sha1));
622
623 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
624 }
625 }
626
627 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
628 {
629 if (!count)
630 fprintf(stderr, "To %s\n", dest);
631
632 switch(ref->status) {
633 case REF_STATUS_NONE:
634 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
635 break;
636 case REF_STATUS_REJECT_NODELETE:
637 print_ref_status('!', "[rejected]", ref, NULL,
638 "remote does not support deleting refs", porcelain);
639 break;
640 case REF_STATUS_UPTODATE:
641 print_ref_status('=', "[up to date]", ref,
642 ref->peer_ref, NULL, porcelain);
643 break;
644 case REF_STATUS_REJECT_NONFASTFORWARD:
645 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
646 "non-fast-forward", porcelain);
647 break;
648 case REF_STATUS_REMOTE_REJECT:
649 print_ref_status('!', "[remote rejected]", ref,
650 ref->deletion ? NULL : ref->peer_ref,
651 ref->remote_status, porcelain);
652 break;
653 case REF_STATUS_EXPECTING_REPORT:
654 print_ref_status('!', "[remote failure]", ref,
655 ref->deletion ? NULL : ref->peer_ref,
656 "remote failed to report status", porcelain);
657 break;
658 case REF_STATUS_OK:
659 print_ok_ref_status(ref, porcelain);
660 break;
661 }
662
663 return 1;
664 }
665
666 static void print_push_status(const char *dest, struct ref *refs,
667 int verbose, int porcelain, int * nonfastforward)
668 {
669 struct ref *ref;
670 int n = 0;
671
672 if (verbose) {
673 for (ref = refs; ref; ref = ref->next)
674 if (ref->status == REF_STATUS_UPTODATE)
675 n += print_one_push_status(ref, dest, n, porcelain);
676 }
677
678 for (ref = refs; ref; ref = ref->next)
679 if (ref->status == REF_STATUS_OK)
680 n += print_one_push_status(ref, dest, n, porcelain);
681
682 *nonfastforward = 0;
683 for (ref = refs; ref; ref = ref->next) {
684 if (ref->status != REF_STATUS_NONE &&
685 ref->status != REF_STATUS_UPTODATE &&
686 ref->status != REF_STATUS_OK)
687 n += print_one_push_status(ref, dest, n, porcelain);
688 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
689 *nonfastforward = 1;
690 }
691 }
692
693 static void verify_remote_names(int nr_heads, const char **heads)
694 {
695 int i;
696
697 for (i = 0; i < nr_heads; i++) {
698 const char *local = heads[i];
699 const char *remote = strrchr(heads[i], ':');
700
701 if (*local == '+')
702 local++;
703
704 /* A matching refspec is okay. */
705 if (remote == local && remote[1] == '\0')
706 continue;
707
708 remote = remote ? (remote + 1) : local;
709 switch (check_ref_format(remote)) {
710 case 0: /* ok */
711 case CHECK_REF_FORMAT_ONELEVEL:
712 /* ok but a single level -- that is fine for
713 * a match pattern.
714 */
715 case CHECK_REF_FORMAT_WILDCARD:
716 /* ok but ends with a pattern-match character */
717 continue;
718 }
719 die("remote part of refspec is not a valid name in %s",
720 heads[i]);
721 }
722 }
723
724 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
725 {
726 struct git_transport_data *data = transport->data;
727 struct send_pack_args args;
728 int ret;
729
730 if (!data->got_remote_heads) {
731 struct ref *tmp_refs;
732 connect_setup(transport, 1, 0);
733
734 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
735 NULL);
736 data->got_remote_heads = 1;
737 }
738
739 memset(&args, 0, sizeof(args));
740 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
741 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
742 args.use_thin_pack = data->options.thin;
743 args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
744 args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
745 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
746
747 ret = send_pack(&args, data->fd, data->conn, remote_refs,
748 &data->extra_have);
749
750 close(data->fd[1]);
751 close(data->fd[0]);
752 ret |= finish_connect(data->conn);
753 data->conn = NULL;
754 data->got_remote_heads = 0;
755
756 return ret;
757 }
758
759 static int connect_git(struct transport *transport, const char *name,
760 const char *executable, int fd[2])
761 {
762 struct git_transport_data *data = transport->data;
763 data->conn = git_connect(data->fd, transport->url,
764 executable, 0);
765 fd[0] = data->fd[0];
766 fd[1] = data->fd[1];
767 return 0;
768 }
769
770 static int disconnect_git(struct transport *transport)
771 {
772 struct git_transport_data *data = transport->data;
773 if (data->conn) {
774 if (data->got_remote_heads)
775 packet_flush(data->fd[1]);
776 close(data->fd[0]);
777 close(data->fd[1]);
778 finish_connect(data->conn);
779 }
780
781 free(data);
782 return 0;
783 }
784
785 void transport_take_over(struct transport *transport,
786 struct child_process *child)
787 {
788 struct git_transport_data *data;
789
790 if (!transport->smart_options)
791 die("Bug detected: Taking over transport requires non-NULL "
792 "smart_options field.");
793
794 data = xcalloc(1, sizeof(*data));
795 data->options = *transport->smart_options;
796 data->conn = child;
797 data->fd[0] = data->conn->out;
798 data->fd[1] = data->conn->in;
799 data->got_remote_heads = 0;
800 transport->data = data;
801
802 transport->set_option = NULL;
803 transport->get_refs_list = get_refs_via_connect;
804 transport->fetch = fetch_refs_via_pack;
805 transport->push = NULL;
806 transport->push_refs = git_transport_push;
807 transport->disconnect = disconnect_git;
808 transport->smart_options = &(data->options);
809 }
810
811 static int is_local(const char *url)
812 {
813 const char *colon = strchr(url, ':');
814 const char *slash = strchr(url, '/');
815 return !colon || (slash && slash < colon) ||
816 has_dos_drive_prefix(url);
817 }
818
819 static int is_file(const char *url)
820 {
821 struct stat buf;
822 if (stat(url, &buf))
823 return 0;
824 return S_ISREG(buf.st_mode);
825 }
826
827 static int is_url(const char *url)
828 {
829 const char *url2, *first_slash;
830
831 if (!url)
832 return 0;
833 url2 = url;
834 first_slash = strchr(url, '/');
835
836 /* Input with no slash at all or slash first can't be URL. */
837 if (!first_slash || first_slash == url)
838 return 0;
839 /* Character before must be : and next must be /. */
840 if (first_slash[-1] != ':' || first_slash[1] != '/')
841 return 0;
842 /* There must be something before the :// */
843 if (first_slash == url + 1)
844 return 0;
845 /*
846 * Check all characters up to first slash - 1. Only alphanum
847 * is allowed.
848 */
849 url2 = url;
850 while (url2 < first_slash - 1) {
851 if (!isalnum((unsigned char)*url2))
852 return 0;
853 url2++;
854 }
855
856 /* Valid enough. */
857 return 1;
858 }
859
860 static int external_specification_len(const char *url)
861 {
862 return strchr(url, ':') - url;
863 }
864
865 struct transport *transport_get(struct remote *remote, const char *url)
866 {
867 struct transport *ret = xcalloc(1, sizeof(*ret));
868
869 if (!remote)
870 die("No remote provided to transport_get()");
871
872 ret->remote = remote;
873
874 if (!url && remote && remote->url)
875 url = remote->url[0];
876 ret->url = url;
877
878 /* In case previous URL had helper forced, reset it. */
879 remote->foreign_vcs = NULL;
880
881 /* maybe it is a foreign URL? */
882 if (url) {
883 const char *p = url;
884
885 while (isalnum(*p))
886 p++;
887 if (!prefixcmp(p, "::"))
888 remote->foreign_vcs = xstrndup(url, p - url);
889 }
890
891 if (remote && remote->foreign_vcs) {
892 transport_helper_init(ret, remote->foreign_vcs);
893 } else if (!prefixcmp(url, "rsync:")) {
894 ret->get_refs_list = get_refs_via_rsync;
895 ret->fetch = fetch_objs_via_rsync;
896 ret->push = rsync_transport_push;
897 ret->smart_options = NULL;
898 } else if (is_local(url) && is_file(url)) {
899 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
900 ret->data = data;
901 ret->get_refs_list = get_refs_from_bundle;
902 ret->fetch = fetch_refs_from_bundle;
903 ret->disconnect = close_bundle;
904 ret->smart_options = NULL;
905 } else if (!is_url(url)
906 || !prefixcmp(url, "file://")
907 || !prefixcmp(url, "git://")
908 || !prefixcmp(url, "ssh://")
909 || !prefixcmp(url, "git+ssh://")
910 || !prefixcmp(url, "ssh+git://")) {
911 /* These are builtin smart transports. */
912 struct git_transport_data *data = xcalloc(1, sizeof(*data));
913 ret->data = data;
914 ret->set_option = NULL;
915 ret->get_refs_list = get_refs_via_connect;
916 ret->fetch = fetch_refs_via_pack;
917 ret->push_refs = git_transport_push;
918 ret->connect = connect_git;
919 ret->disconnect = disconnect_git;
920 ret->smart_options = &(data->options);
921
922 data->conn = NULL;
923 data->got_remote_heads = 0;
924 } else {
925 /* Unknown protocol in URL. Pass to external handler. */
926 int len = external_specification_len(url);
927 char *handler = xmalloc(len + 1);
928 handler[len] = 0;
929 strncpy(handler, url, len);
930 transport_helper_init(ret, handler);
931 }
932
933 if (ret->smart_options) {
934 ret->smart_options->thin = 1;
935 ret->smart_options->uploadpack = "git-upload-pack";
936 if (remote->uploadpack)
937 ret->smart_options->uploadpack = remote->uploadpack;
938 ret->smart_options->receivepack = "git-receive-pack";
939 if (remote->receivepack)
940 ret->smart_options->receivepack = remote->receivepack;
941 }
942
943 return ret;
944 }
945
946 int transport_set_option(struct transport *transport,
947 const char *name, const char *value)
948 {
949 int git_reports = 1, protocol_reports = 1;
950
951 if (transport->smart_options)
952 git_reports = set_git_option(transport->smart_options,
953 name, value);
954
955 if (transport->set_option)
956 protocol_reports = transport->set_option(transport, name,
957 value);
958
959 /* If either report is 0, report 0 (success). */
960 if (!git_reports || !protocol_reports)
961 return 0;
962 /* If either reports -1 (invalid value), report -1. */
963 if ((git_reports == -1) || (protocol_reports == -1))
964 return -1;
965 /* Otherwise if both report unknown, report unknown. */
966 return 1;
967 }
968
969 int transport_push(struct transport *transport,
970 int refspec_nr, const char **refspec, int flags,
971 int *nonfastforward)
972 {
973 *nonfastforward = 0;
974 verify_remote_names(refspec_nr, refspec);
975
976 if (transport->push) {
977 return transport->push(transport, refspec_nr, refspec, flags);
978 } else if (transport->push_refs) {
979 struct ref *remote_refs =
980 transport->get_refs_list(transport, 1);
981 struct ref *local_refs = get_local_heads();
982 int match_flags = MATCH_REFS_NONE;
983 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
984 int quiet = flags & TRANSPORT_PUSH_QUIET;
985 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
986 int ret;
987
988 if (flags & TRANSPORT_PUSH_ALL)
989 match_flags |= MATCH_REFS_ALL;
990 if (flags & TRANSPORT_PUSH_MIRROR)
991 match_flags |= MATCH_REFS_MIRROR;
992
993 if (match_refs(local_refs, &remote_refs,
994 refspec_nr, refspec, match_flags)) {
995 return -1;
996 }
997
998 ret = transport->push_refs(transport, remote_refs, flags);
999
1000 if (!quiet || push_had_errors(remote_refs))
1001 print_push_status(transport->url, remote_refs,
1002 verbose | porcelain, porcelain,
1003 nonfastforward);
1004
1005 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1006 struct ref *ref;
1007 for (ref = remote_refs; ref; ref = ref->next)
1008 update_tracking_ref(transport->remote, ref, verbose);
1009 }
1010
1011 if (!quiet && !ret && !refs_pushed(remote_refs))
1012 fprintf(stderr, "Everything up-to-date\n");
1013 return ret;
1014 }
1015 return 1;
1016 }
1017
1018 const struct ref *transport_get_remote_refs(struct transport *transport)
1019 {
1020 if (!transport->remote_refs)
1021 transport->remote_refs = transport->get_refs_list(transport, 0);
1022
1023 return transport->remote_refs;
1024 }
1025
1026 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1027 {
1028 int rc;
1029 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1030 struct ref **heads = NULL;
1031 struct ref *rm;
1032
1033 for (rm = refs; rm; rm = rm->next) {
1034 nr_refs++;
1035 if (rm->peer_ref &&
1036 !is_null_sha1(rm->old_sha1) &&
1037 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1038 continue;
1039 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1040 heads[nr_heads++] = rm;
1041 }
1042
1043 if (!nr_heads) {
1044 /*
1045 * When deepening of a shallow repository is requested,
1046 * then local and remote refs are likely to still be equal.
1047 * Just feed them all to the fetch method in that case.
1048 * This condition shouldn't be met in a non-deepening fetch
1049 * (see builtin-fetch.c:quickfetch()).
1050 */
1051 heads = xmalloc(nr_refs * sizeof(*heads));
1052 for (rm = refs; rm; rm = rm->next)
1053 heads[nr_heads++] = rm;
1054 }
1055
1056 rc = transport->fetch(transport, nr_heads, heads);
1057
1058 free(heads);
1059 return rc;
1060 }
1061
1062 void transport_unlock_pack(struct transport *transport)
1063 {
1064 if (transport->pack_lockfile) {
1065 unlink_or_warn(transport->pack_lockfile);
1066 free(transport->pack_lockfile);
1067 transport->pack_lockfile = NULL;
1068 }
1069 }
1070
1071 int transport_connect(struct transport *transport, const char *name,
1072 const char *exec, int fd[2])
1073 {
1074 if (transport->connect)
1075 return transport->connect(transport, name, exec, fd);
1076 else
1077 die("Operation not supported by protocol");
1078 }
1079
1080 int transport_disconnect(struct transport *transport)
1081 {
1082 int ret = 0;
1083 if (transport->disconnect)
1084 ret = transport->disconnect(transport);
1085 free(transport);
1086 return ret;
1087 }
1088
1089 /*
1090 * Strip username (and password) from an url and return
1091 * it in a newly allocated string.
1092 */
1093 char *transport_anonymize_url(const char *url)
1094 {
1095 char *anon_url, *scheme_prefix, *anon_part;
1096 size_t anon_len, prefix_len = 0;
1097
1098 anon_part = strchr(url, '@');
1099 if (is_local(url) || !anon_part)
1100 goto literal_copy;
1101
1102 anon_len = strlen(++anon_part);
1103 scheme_prefix = strstr(url, "://");
1104 if (!scheme_prefix) {
1105 if (!strchr(anon_part, ':'))
1106 /* cannot be "me@there:/path/name" */
1107 goto literal_copy;
1108 } else {
1109 const char *cp;
1110 /* make sure scheme is reasonable */
1111 for (cp = url; cp < scheme_prefix; cp++) {
1112 switch (*cp) {
1113 /* RFC 1738 2.1 */
1114 case '+': case '.': case '-':
1115 break; /* ok */
1116 default:
1117 if (isalnum(*cp))
1118 break;
1119 /* it isn't */
1120 goto literal_copy;
1121 }
1122 }
1123 /* @ past the first slash does not count */
1124 cp = strchr(scheme_prefix + 3, '/');
1125 if (cp && cp < anon_part)
1126 goto literal_copy;
1127 prefix_len = scheme_prefix - url + 3;
1128 }
1129 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1130 memcpy(anon_url, url, prefix_len);
1131 memcpy(anon_url + prefix_len, anon_part, anon_len);
1132 return anon_url;
1133 literal_copy:
1134 return xstrdup(url);
1135 }