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push --force-with-lease: implement logic to populate old_sha1_expect[]
[alt-git.git] / transport.c
blob5dd92b7801b4189f78112965f23ee16d49b15aad
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 "remote.h"
7 #include "connect.h"
8 #include "send-pack.h"
9 #include "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13 #include "branch.h"
14 #include "url.h"
15 #include "submodule.h"
16 #include "string-list.h"
17
18 /* rsync support */
19
20 /*
21 * We copy packed-refs and refs/ into a temporary file, then read the
22 * loose refs recursively (sorting whenever possible), and then inserting
23 * those packed refs that are not yet in the list (not validating, but
24 * assuming that the file is sorted).
25 *
26 * Appears refactoring this from refs.c is too cumbersome.
27 */
28
29 static int str_cmp(const void *a, const void *b)
30 {
31 const char *s1 = a;
32 const char *s2 = b;
33
34 return strcmp(s1, s2);
35 }
36
37 /* path->buf + name_offset is expected to point to "refs/" */
38
39 static int read_loose_refs(struct strbuf *path, int name_offset,
40 struct ref **tail)
41 {
42 DIR *dir = opendir(path->buf);
43 struct dirent *de;
44 struct {
45 char **entries;
46 int nr, alloc;
47 } list;
48 int i, pathlen;
49
50 if (!dir)
51 return -1;
52
53 memset (&list, 0, sizeof(list));
54
55 while ((de = readdir(dir))) {
56 if (is_dot_or_dotdot(de->d_name))
57 continue;
58 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
59 list.entries[list.nr++] = xstrdup(de->d_name);
60 }
61 closedir(dir);
62
63 /* sort the list */
64
65 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
66
67 pathlen = path->len;
68 strbuf_addch(path, '/');
69
70 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
71 strbuf_addstr(path, list.entries[i]);
72 if (read_loose_refs(path, name_offset, tail)) {
73 int fd = open(path->buf, O_RDONLY);
74 char buffer[40];
75 struct ref *next;
76
77 if (fd < 0)
78 continue;
79 next = alloc_ref(path->buf + name_offset);
80 if (read_in_full(fd, buffer, 40) != 40 ||
81 get_sha1_hex(buffer, next->old_sha1)) {
82 close(fd);
83 free(next);
84 continue;
85 }
86 close(fd);
87 (*tail)->next = next;
88 *tail = next;
89 }
90 }
91 strbuf_setlen(path, pathlen);
92
93 for (i = 0; i < list.nr; i++)
94 free(list.entries[i]);
95 free(list.entries);
96
97 return 0;
98 }
99
100 /* insert the packed refs for which no loose refs were found */
101
102 static void insert_packed_refs(const char *packed_refs, struct ref **list)
103 {
104 FILE *f = fopen(packed_refs, "r");
105 static char buffer[PATH_MAX];
106
107 if (!f)
108 return;
109
110 for (;;) {
111 int cmp = 0; /* assigned before used */
112 int len;
113
114 if (!fgets(buffer, sizeof(buffer), f)) {
115 fclose(f);
116 return;
117 }
118
119 if (hexval(buffer[0]) > 0xf)
120 continue;
121 len = strlen(buffer);
122 if (len && buffer[len - 1] == '\n')
123 buffer[--len] = '\0';
124 if (len < 41)
125 continue;
126 while ((*list)->next &&
127 (cmp = strcmp(buffer + 41,
128 (*list)->next->name)) > 0)
129 list = &(*list)->next;
130 if (!(*list)->next || cmp < 0) {
131 struct ref *next = alloc_ref(buffer + 41);
132 buffer[40] = '\0';
133 if (get_sha1_hex(buffer, next->old_sha1)) {
134 warning ("invalid SHA-1: %s", buffer);
135 free(next);
136 continue;
137 }
138 next->next = (*list)->next;
139 (*list)->next = next;
140 list = &(*list)->next;
141 }
142 }
143 }
144
145 static void set_upstreams(struct transport *transport, struct ref *refs,
146 int pretend)
147 {
148 struct ref *ref;
149 for (ref = refs; ref; ref = ref->next) {
150 const char *localname;
151 const char *tmp;
152 const char *remotename;
153 unsigned char sha[20];
154 int flag = 0;
155 /*
156 * Check suitability for tracking. Must be successful /
157 * already up-to-date ref create/modify (not delete).
158 */
159 if (ref->status != REF_STATUS_OK &&
160 ref->status != REF_STATUS_UPTODATE)
161 continue;
162 if (!ref->peer_ref)
163 continue;
164 if (is_null_sha1(ref->new_sha1))
165 continue;
166
167 /* Follow symbolic refs (mainly for HEAD). */
168 localname = ref->peer_ref->name;
169 remotename = ref->name;
170 tmp = resolve_ref_unsafe(localname, sha, 1, &flag);
171 if (tmp && flag & REF_ISSYMREF &&
172 !prefixcmp(tmp, "refs/heads/"))
173 localname = tmp;
174
175 /* Both source and destination must be local branches. */
176 if (!localname || prefixcmp(localname, "refs/heads/"))
177 continue;
178 if (!remotename || prefixcmp(remotename, "refs/heads/"))
179 continue;
180
181 if (!pretend)
182 install_branch_config(BRANCH_CONFIG_VERBOSE,
183 localname + 11, transport->remote->name,
184 remotename);
185 else
186 printf("Would set upstream of '%s' to '%s' of '%s'\n",
187 localname + 11, remotename + 11,
188 transport->remote->name);
189 }
190 }
191
192 static const char *rsync_url(const char *url)
193 {
194 return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
195 }
196
197 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
198 {
199 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
200 struct ref dummy = {NULL}, *tail = &dummy;
201 struct child_process rsync;
202 const char *args[5];
203 int temp_dir_len;
204
205 if (for_push)
206 return NULL;
207
208 /* copy the refs to the temporary directory */
209
210 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
211 if (!mkdtemp(temp_dir.buf))
212 die_errno ("Could not make temporary directory");
213 temp_dir_len = temp_dir.len;
214
215 strbuf_addstr(&buf, rsync_url(transport->url));
216 strbuf_addstr(&buf, "/refs");
217
218 memset(&rsync, 0, sizeof(rsync));
219 rsync.argv = args;
220 rsync.stdout_to_stderr = 1;
221 args[0] = "rsync";
222 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
223 args[2] = buf.buf;
224 args[3] = temp_dir.buf;
225 args[4] = NULL;
226
227 if (run_command(&rsync))
228 die ("Could not run rsync to get refs");
229
230 strbuf_reset(&buf);
231 strbuf_addstr(&buf, rsync_url(transport->url));
232 strbuf_addstr(&buf, "/packed-refs");
233
234 args[2] = buf.buf;
235
236 if (run_command(&rsync))
237 die ("Could not run rsync to get refs");
238
239 /* read the copied refs */
240
241 strbuf_addstr(&temp_dir, "/refs");
242 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
243 strbuf_setlen(&temp_dir, temp_dir_len);
244
245 tail = &dummy;
246 strbuf_addstr(&temp_dir, "/packed-refs");
247 insert_packed_refs(temp_dir.buf, &tail);
248 strbuf_setlen(&temp_dir, temp_dir_len);
249
250 if (remove_dir_recursively(&temp_dir, 0))
251 warning ("Error removing temporary directory %s.",
252 temp_dir.buf);
253
254 strbuf_release(&buf);
255 strbuf_release(&temp_dir);
256
257 return dummy.next;
258 }
259
260 static int fetch_objs_via_rsync(struct transport *transport,
261 int nr_objs, struct ref **to_fetch)
262 {
263 struct strbuf buf = STRBUF_INIT;
264 struct child_process rsync;
265 const char *args[8];
266 int result;
267
268 strbuf_addstr(&buf, rsync_url(transport->url));
269 strbuf_addstr(&buf, "/objects/");
270
271 memset(&rsync, 0, sizeof(rsync));
272 rsync.argv = args;
273 rsync.stdout_to_stderr = 1;
274 args[0] = "rsync";
275 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
276 args[2] = "--ignore-existing";
277 args[3] = "--exclude";
278 args[4] = "info";
279 args[5] = buf.buf;
280 args[6] = get_object_directory();
281 args[7] = NULL;
282
283 /* NEEDSWORK: handle one level of alternates */
284 result = run_command(&rsync);
285
286 strbuf_release(&buf);
287
288 return result;
289 }
290
291 static int write_one_ref(const char *name, const unsigned char *sha1,
292 int flags, void *data)
293 {
294 struct strbuf *buf = data;
295 int len = buf->len;
296 FILE *f;
297
298 /* when called via for_each_ref(), flags is non-zero */
299 if (flags && prefixcmp(name, "refs/heads/") &&
300 prefixcmp(name, "refs/tags/"))
301 return 0;
302
303 strbuf_addstr(buf, name);
304 if (safe_create_leading_directories(buf->buf) ||
305 !(f = fopen(buf->buf, "w")) ||
306 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
307 fclose(f))
308 return error("problems writing temporary file %s", buf->buf);
309 strbuf_setlen(buf, len);
310 return 0;
311 }
312
313 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
314 int refspec_nr, const char **refspec)
315 {
316 int i;
317
318 for (i = 0; i < refspec_nr; i++) {
319 unsigned char sha1[20];
320 char *ref;
321
322 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
323 return error("Could not get ref %s", refspec[i]);
324
325 if (write_one_ref(ref, sha1, 0, temp_dir)) {
326 free(ref);
327 return -1;
328 }
329 free(ref);
330 }
331 return 0;
332 }
333
334 static int rsync_transport_push(struct transport *transport,
335 int refspec_nr, const char **refspec, int flags)
336 {
337 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
338 int result = 0, i;
339 struct child_process rsync;
340 const char *args[10];
341
342 if (flags & TRANSPORT_PUSH_MIRROR)
343 return error("rsync transport does not support mirror mode");
344
345 /* first push the objects */
346
347 strbuf_addstr(&buf, rsync_url(transport->url));
348 strbuf_addch(&buf, '/');
349
350 memset(&rsync, 0, sizeof(rsync));
351 rsync.argv = args;
352 rsync.stdout_to_stderr = 1;
353 i = 0;
354 args[i++] = "rsync";
355 args[i++] = "-a";
356 if (flags & TRANSPORT_PUSH_DRY_RUN)
357 args[i++] = "--dry-run";
358 if (transport->verbose > 1)
359 args[i++] = "-v";
360 args[i++] = "--ignore-existing";
361 args[i++] = "--exclude";
362 args[i++] = "info";
363 args[i++] = get_object_directory();
364 args[i++] = buf.buf;
365 args[i++] = NULL;
366
367 if (run_command(&rsync))
368 return error("Could not push objects to %s",
369 rsync_url(transport->url));
370
371 /* copy the refs to the temporary directory; they could be packed. */
372
373 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
374 if (!mkdtemp(temp_dir.buf))
375 die_errno ("Could not make temporary directory");
376 strbuf_addch(&temp_dir, '/');
377
378 if (flags & TRANSPORT_PUSH_ALL) {
379 if (for_each_ref(write_one_ref, &temp_dir))
380 return -1;
381 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
382 return -1;
383
384 i = 2;
385 if (flags & TRANSPORT_PUSH_DRY_RUN)
386 args[i++] = "--dry-run";
387 if (!(flags & TRANSPORT_PUSH_FORCE))
388 args[i++] = "--ignore-existing";
389 args[i++] = temp_dir.buf;
390 args[i++] = rsync_url(transport->url);
391 args[i++] = NULL;
392 if (run_command(&rsync))
393 result = error("Could not push to %s",
394 rsync_url(transport->url));
395
396 if (remove_dir_recursively(&temp_dir, 0))
397 warning ("Could not remove temporary directory %s.",
398 temp_dir.buf);
399
400 strbuf_release(&buf);
401 strbuf_release(&temp_dir);
402
403 return result;
404 }
405
406 struct bundle_transport_data {
407 int fd;
408 struct bundle_header header;
409 };
410
411 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
412 {
413 struct bundle_transport_data *data = transport->data;
414 struct ref *result = NULL;
415 int i;
416
417 if (for_push)
418 return NULL;
419
420 if (data->fd > 0)
421 close(data->fd);
422 data->fd = read_bundle_header(transport->url, &data->header);
423 if (data->fd < 0)
424 die ("Could not read bundle '%s'.", transport->url);
425 for (i = 0; i < data->header.references.nr; i++) {
426 struct ref_list_entry *e = data->header.references.list + i;
427 struct ref *ref = alloc_ref(e->name);
428 hashcpy(ref->old_sha1, e->sha1);
429 ref->next = result;
430 result = ref;
431 }
432 return result;
433 }
434
435 static int fetch_refs_from_bundle(struct transport *transport,
436 int nr_heads, struct ref **to_fetch)
437 {
438 struct bundle_transport_data *data = transport->data;
439 return unbundle(&data->header, data->fd,
440 transport->progress ? BUNDLE_VERBOSE : 0);
441 }
442
443 static int close_bundle(struct transport *transport)
444 {
445 struct bundle_transport_data *data = transport->data;
446 if (data->fd > 0)
447 close(data->fd);
448 free(data);
449 return 0;
450 }
451
452 struct git_transport_data {
453 struct git_transport_options options;
454 struct child_process *conn;
455 int fd[2];
456 unsigned got_remote_heads : 1;
457 struct extra_have_objects extra_have;
458 };
459
460 static int set_git_option(struct git_transport_options *opts,
461 const char *name, const char *value)
462 {
463 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
464 opts->uploadpack = value;
465 return 0;
466 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
467 opts->receivepack = value;
468 return 0;
469 } else if (!strcmp(name, TRANS_OPT_THIN)) {
470 opts->thin = !!value;
471 return 0;
472 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
473 opts->followtags = !!value;
474 return 0;
475 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
476 opts->keep = !!value;
477 return 0;
478 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
479 if (!value)
480 opts->depth = 0;
481 else {
482 char *end;
483 opts->depth = strtol(value, &end, 0);
484 if (*end)
485 die("transport: invalid depth option '%s'", value);
486 }
487 return 0;
488 }
489 return 1;
490 }
491
492 static int connect_setup(struct transport *transport, int for_push, int verbose)
493 {
494 struct git_transport_data *data = transport->data;
495
496 if (data->conn)
497 return 0;
498
499 data->conn = git_connect(data->fd, transport->url,
500 for_push ? data->options.receivepack :
501 data->options.uploadpack,
502 verbose ? CONNECT_VERBOSE : 0);
503
504 return 0;
505 }
506
507 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
508 {
509 struct git_transport_data *data = transport->data;
510 struct ref *refs;
511
512 connect_setup(transport, for_push, 0);
513 get_remote_heads(data->fd[0], NULL, 0, &refs,
514 for_push ? REF_NORMAL : 0, &data->extra_have);
515 data->got_remote_heads = 1;
516
517 return refs;
518 }
519
520 static int fetch_refs_via_pack(struct transport *transport,
521 int nr_heads, struct ref **to_fetch)
522 {
523 struct git_transport_data *data = transport->data;
524 const struct ref *refs;
525 char *dest = xstrdup(transport->url);
526 struct fetch_pack_args args;
527 struct ref *refs_tmp = NULL;
528
529 memset(&args, 0, sizeof(args));
530 args.uploadpack = data->options.uploadpack;
531 args.keep_pack = data->options.keep;
532 args.lock_pack = 1;
533 args.use_thin_pack = data->options.thin;
534 args.include_tag = data->options.followtags;
535 args.verbose = (transport->verbose > 1);
536 args.quiet = (transport->verbose < 0);
537 args.no_progress = !transport->progress;
538 args.depth = data->options.depth;
539 args.check_self_contained_and_connected =
540 data->options.check_self_contained_and_connected;
541
542 if (!data->got_remote_heads) {
543 connect_setup(transport, 0, 0);
544 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0, NULL);
545 data->got_remote_heads = 1;
546 }
547
548 refs = fetch_pack(&args, data->fd, data->conn,
549 refs_tmp ? refs_tmp : transport->remote_refs,
550 dest, to_fetch, nr_heads,
551 &transport->pack_lockfile);
552 close(data->fd[0]);
553 close(data->fd[1]);
554 if (finish_connect(data->conn))
555 refs = NULL;
556 data->conn = NULL;
557 data->got_remote_heads = 0;
558 data->options.self_contained_and_connected =
559 args.self_contained_and_connected;
560
561 free_refs(refs_tmp);
562
563 free(dest);
564 return (refs ? 0 : -1);
565 }
566
567 static int push_had_errors(struct ref *ref)
568 {
569 for (; ref; ref = ref->next) {
570 switch (ref->status) {
571 case REF_STATUS_NONE:
572 case REF_STATUS_UPTODATE:
573 case REF_STATUS_OK:
574 break;
575 default:
576 return 1;
577 }
578 }
579 return 0;
580 }
581
582 int transport_refs_pushed(struct ref *ref)
583 {
584 for (; ref; ref = ref->next) {
585 switch(ref->status) {
586 case REF_STATUS_NONE:
587 case REF_STATUS_UPTODATE:
588 break;
589 default:
590 return 1;
591 }
592 }
593 return 0;
594 }
595
596 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
597 {
598 struct refspec rs;
599
600 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
601 return;
602
603 rs.src = ref->name;
604 rs.dst = NULL;
605
606 if (!remote_find_tracking(remote, &rs)) {
607 if (verbose)
608 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
609 if (ref->deletion) {
610 delete_ref(rs.dst, NULL, 0);
611 } else
612 update_ref("update by push", rs.dst,
613 ref->new_sha1, NULL, 0, 0);
614 free(rs.dst);
615 }
616 }
617
618 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
619 {
620 if (porcelain) {
621 if (from)
622 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
623 else
624 fprintf(stdout, "%c\t:%s\t", flag, to->name);
625 if (msg)
626 fprintf(stdout, "%s (%s)\n", summary, msg);
627 else
628 fprintf(stdout, "%s\n", summary);
629 } else {
630 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
631 if (from)
632 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
633 else
634 fputs(prettify_refname(to->name), stderr);
635 if (msg) {
636 fputs(" (", stderr);
637 fputs(msg, stderr);
638 fputc(')', stderr);
639 }
640 fputc('\n', stderr);
641 }
642 }
643
644 static const char *status_abbrev(unsigned char sha1[20])
645 {
646 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
647 }
648
649 static void print_ok_ref_status(struct ref *ref, int porcelain)
650 {
651 if (ref->deletion)
652 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
653 else if (is_null_sha1(ref->old_sha1))
654 print_ref_status('*',
655 (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
656 "[new branch]"),
657 ref, ref->peer_ref, NULL, porcelain);
658 else {
659 char quickref[84];
660 char type;
661 const char *msg;
662
663 strcpy(quickref, status_abbrev(ref->old_sha1));
664 if (ref->forced_update) {
665 strcat(quickref, "...");
666 type = '+';
667 msg = "forced update";
668 } else {
669 strcat(quickref, "..");
670 type = ' ';
671 msg = NULL;
672 }
673 strcat(quickref, status_abbrev(ref->new_sha1));
674
675 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
676 }
677 }
678
679 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
680 {
681 if (!count)
682 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
683
684 switch(ref->status) {
685 case REF_STATUS_NONE:
686 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
687 break;
688 case REF_STATUS_REJECT_NODELETE:
689 print_ref_status('!', "[rejected]", ref, NULL,
690 "remote does not support deleting refs", porcelain);
691 break;
692 case REF_STATUS_UPTODATE:
693 print_ref_status('=', "[up to date]", ref,
694 ref->peer_ref, NULL, porcelain);
695 break;
696 case REF_STATUS_REJECT_NONFASTFORWARD:
697 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
698 "non-fast-forward", porcelain);
699 break;
700 case REF_STATUS_REJECT_ALREADY_EXISTS:
701 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
702 "already exists", porcelain);
703 break;
704 case REF_STATUS_REJECT_FETCH_FIRST:
705 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
706 "fetch first", porcelain);
707 break;
708 case REF_STATUS_REJECT_NEEDS_FORCE:
709 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
710 "needs force", porcelain);
711 break;
712 case REF_STATUS_REMOTE_REJECT:
713 print_ref_status('!', "[remote rejected]", ref,
714 ref->deletion ? NULL : ref->peer_ref,
715 ref->remote_status, porcelain);
716 break;
717 case REF_STATUS_EXPECTING_REPORT:
718 print_ref_status('!', "[remote failure]", ref,
719 ref->deletion ? NULL : ref->peer_ref,
720 "remote failed to report status", porcelain);
721 break;
722 case REF_STATUS_OK:
723 print_ok_ref_status(ref, porcelain);
724 break;
725 }
726
727 return 1;
728 }
729
730 void transport_print_push_status(const char *dest, struct ref *refs,
731 int verbose, int porcelain, unsigned int *reject_reasons)
732 {
733 struct ref *ref;
734 int n = 0;
735 unsigned char head_sha1[20];
736 char *head;
737
738 head = resolve_refdup("HEAD", head_sha1, 1, NULL);
739
740 if (verbose) {
741 for (ref = refs; ref; ref = ref->next)
742 if (ref->status == REF_STATUS_UPTODATE)
743 n += print_one_push_status(ref, dest, n, porcelain);
744 }
745
746 for (ref = refs; ref; ref = ref->next)
747 if (ref->status == REF_STATUS_OK)
748 n += print_one_push_status(ref, dest, n, porcelain);
749
750 *reject_reasons = 0;
751 for (ref = refs; ref; ref = ref->next) {
752 if (ref->status != REF_STATUS_NONE &&
753 ref->status != REF_STATUS_UPTODATE &&
754 ref->status != REF_STATUS_OK)
755 n += print_one_push_status(ref, dest, n, porcelain);
756 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
757 if (head != NULL && !strcmp(head, ref->name))
758 *reject_reasons |= REJECT_NON_FF_HEAD;
759 else
760 *reject_reasons |= REJECT_NON_FF_OTHER;
761 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
762 *reject_reasons |= REJECT_ALREADY_EXISTS;
763 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
764 *reject_reasons |= REJECT_FETCH_FIRST;
765 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
766 *reject_reasons |= REJECT_NEEDS_FORCE;
767 }
768 }
769 }
770
771 void transport_verify_remote_names(int nr_heads, const char **heads)
772 {
773 int i;
774
775 for (i = 0; i < nr_heads; i++) {
776 const char *local = heads[i];
777 const char *remote = strrchr(heads[i], ':');
778
779 if (*local == '+')
780 local++;
781
782 /* A matching refspec is okay. */
783 if (remote == local && remote[1] == '\0')
784 continue;
785
786 remote = remote ? (remote + 1) : local;
787 if (check_refname_format(remote,
788 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
789 die("remote part of refspec is not a valid name in %s",
790 heads[i]);
791 }
792 }
793
794 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
795 {
796 struct git_transport_data *data = transport->data;
797 struct send_pack_args args;
798 int ret;
799
800 if (!data->got_remote_heads) {
801 struct ref *tmp_refs;
802 connect_setup(transport, 1, 0);
803
804 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL, NULL);
805 data->got_remote_heads = 1;
806 }
807
808 memset(&args, 0, sizeof(args));
809 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
810 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
811 args.use_thin_pack = data->options.thin;
812 args.verbose = (transport->verbose > 0);
813 args.quiet = (transport->verbose < 0);
814 args.progress = transport->progress;
815 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
816 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
817
818 ret = send_pack(&args, data->fd, data->conn, remote_refs,
819 &data->extra_have);
820
821 close(data->fd[1]);
822 close(data->fd[0]);
823 ret |= finish_connect(data->conn);
824 data->conn = NULL;
825 data->got_remote_heads = 0;
826
827 return ret;
828 }
829
830 static int connect_git(struct transport *transport, const char *name,
831 const char *executable, int fd[2])
832 {
833 struct git_transport_data *data = transport->data;
834 data->conn = git_connect(data->fd, transport->url,
835 executable, 0);
836 fd[0] = data->fd[0];
837 fd[1] = data->fd[1];
838 return 0;
839 }
840
841 static int disconnect_git(struct transport *transport)
842 {
843 struct git_transport_data *data = transport->data;
844 if (data->conn) {
845 if (data->got_remote_heads)
846 packet_flush(data->fd[1]);
847 close(data->fd[0]);
848 close(data->fd[1]);
849 finish_connect(data->conn);
850 }
851
852 free(data);
853 return 0;
854 }
855
856 void transport_take_over(struct transport *transport,
857 struct child_process *child)
858 {
859 struct git_transport_data *data;
860
861 if (!transport->smart_options)
862 die("Bug detected: Taking over transport requires non-NULL "
863 "smart_options field.");
864
865 data = xcalloc(1, sizeof(*data));
866 data->options = *transport->smart_options;
867 data->conn = child;
868 data->fd[0] = data->conn->out;
869 data->fd[1] = data->conn->in;
870 data->got_remote_heads = 0;
871 transport->data = data;
872
873 transport->set_option = NULL;
874 transport->get_refs_list = get_refs_via_connect;
875 transport->fetch = fetch_refs_via_pack;
876 transport->push = NULL;
877 transport->push_refs = git_transport_push;
878 transport->disconnect = disconnect_git;
879 transport->smart_options = &(data->options);
880 }
881
882 static int is_local(const char *url)
883 {
884 const char *colon = strchr(url, ':');
885 const char *slash = strchr(url, '/');
886 return !colon || (slash && slash < colon) ||
887 has_dos_drive_prefix(url);
888 }
889
890 static int is_file(const char *url)
891 {
892 struct stat buf;
893 if (stat(url, &buf))
894 return 0;
895 return S_ISREG(buf.st_mode);
896 }
897
898 static int external_specification_len(const char *url)
899 {
900 return strchr(url, ':') - url;
901 }
902
903 struct transport *transport_get(struct remote *remote, const char *url)
904 {
905 const char *helper;
906 struct transport *ret = xcalloc(1, sizeof(*ret));
907
908 ret->progress = isatty(2);
909
910 if (!remote)
911 die("No remote provided to transport_get()");
912
913 ret->got_remote_refs = 0;
914 ret->remote = remote;
915 helper = remote->foreign_vcs;
916
917 if (!url && remote->url)
918 url = remote->url[0];
919 ret->url = url;
920
921 /* maybe it is a foreign URL? */
922 if (url) {
923 const char *p = url;
924
925 while (is_urlschemechar(p == url, *p))
926 p++;
927 if (!prefixcmp(p, "::"))
928 helper = xstrndup(url, p - url);
929 }
930
931 if (helper) {
932 transport_helper_init(ret, helper);
933 } else if (!prefixcmp(url, "rsync:")) {
934 ret->get_refs_list = get_refs_via_rsync;
935 ret->fetch = fetch_objs_via_rsync;
936 ret->push = rsync_transport_push;
937 ret->smart_options = NULL;
938 } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
939 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
940 ret->data = data;
941 ret->get_refs_list = get_refs_from_bundle;
942 ret->fetch = fetch_refs_from_bundle;
943 ret->disconnect = close_bundle;
944 ret->smart_options = NULL;
945 } else if (!is_url(url)
946 || !prefixcmp(url, "file://")
947 || !prefixcmp(url, "git://")
948 || !prefixcmp(url, "ssh://")
949 || !prefixcmp(url, "git+ssh://")
950 || !prefixcmp(url, "ssh+git://")) {
951 /* These are builtin smart transports. */
952 struct git_transport_data *data = xcalloc(1, sizeof(*data));
953 ret->data = data;
954 ret->set_option = NULL;
955 ret->get_refs_list = get_refs_via_connect;
956 ret->fetch = fetch_refs_via_pack;
957 ret->push_refs = git_transport_push;
958 ret->connect = connect_git;
959 ret->disconnect = disconnect_git;
960 ret->smart_options = &(data->options);
961
962 data->conn = NULL;
963 data->got_remote_heads = 0;
964 } else {
965 /* Unknown protocol in URL. Pass to external handler. */
966 int len = external_specification_len(url);
967 char *handler = xmalloc(len + 1);
968 handler[len] = 0;
969 strncpy(handler, url, len);
970 transport_helper_init(ret, handler);
971 }
972
973 if (ret->smart_options) {
974 ret->smart_options->thin = 1;
975 ret->smart_options->uploadpack = "git-upload-pack";
976 if (remote->uploadpack)
977 ret->smart_options->uploadpack = remote->uploadpack;
978 ret->smart_options->receivepack = "git-receive-pack";
979 if (remote->receivepack)
980 ret->smart_options->receivepack = remote->receivepack;
981 }
982
983 return ret;
984 }
985
986 int transport_set_option(struct transport *transport,
987 const char *name, const char *value)
988 {
989 int git_reports = 1, protocol_reports = 1;
990
991 if (transport->smart_options)
992 git_reports = set_git_option(transport->smart_options,
993 name, value);
994
995 if (transport->set_option)
996 protocol_reports = transport->set_option(transport, name,
997 value);
998
999 /* If either report is 0, report 0 (success). */
1000 if (!git_reports || !protocol_reports)
1001 return 0;
1002 /* If either reports -1 (invalid value), report -1. */
1003 if ((git_reports == -1) || (protocol_reports == -1))
1004 return -1;
1005 /* Otherwise if both report unknown, report unknown. */
1006 return 1;
1007 }
1008
1009 void transport_set_verbosity(struct transport *transport, int verbosity,
1010 int force_progress)
1011 {
1012 if (verbosity >= 1)
1013 transport->verbose = verbosity <= 3 ? verbosity : 3;
1014 if (verbosity < 0)
1015 transport->verbose = -1;
1016
1017 /**
1018 * Rules used to determine whether to report progress (processing aborts
1019 * when a rule is satisfied):
1020 *
1021 * . Report progress, if force_progress is 1 (ie. --progress).
1022 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1023 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1024 * . Report progress if isatty(2) is 1.
1025 **/
1026 if (force_progress >= 0)
1027 transport->progress = !!force_progress;
1028 else
1029 transport->progress = verbosity >= 0 && isatty(2);
1030 }
1031
1032 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1033 {
1034 int i;
1035
1036 fprintf(stderr, "The following submodule paths contain changes that can\n"
1037 "not be found on any remote:\n");
1038 for (i = 0; i < needs_pushing->nr; i++)
1039 printf(" %s\n", needs_pushing->items[i].string);
1040 fprintf(stderr, "\nPlease try\n\n"
1041 " git push --recurse-submodules=on-demand\n\n"
1042 "or cd to the path and use\n\n"
1043 " git push\n\n"
1044 "to push them to a remote.\n\n");
1045
1046 string_list_clear(needs_pushing, 0);
1047
1048 die("Aborting.");
1049 }
1050
1051 static int run_pre_push_hook(struct transport *transport,
1052 struct ref *remote_refs)
1053 {
1054 int ret = 0, x;
1055 struct ref *r;
1056 struct child_process proc;
1057 struct strbuf buf;
1058 const char *argv[4];
1059
1060 if (!(argv[0] = find_hook("pre-push")))
1061 return 0;
1062
1063 argv[1] = transport->remote->name;
1064 argv[2] = transport->url;
1065 argv[3] = NULL;
1066
1067 memset(&proc, 0, sizeof(proc));
1068 proc.argv = argv;
1069 proc.in = -1;
1070
1071 if (start_command(&proc)) {
1072 finish_command(&proc);
1073 return -1;
1074 }
1075
1076 strbuf_init(&buf, 256);
1077
1078 for (r = remote_refs; r; r = r->next) {
1079 if (!r->peer_ref) continue;
1080 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1081 if (r->status == REF_STATUS_UPTODATE) continue;
1082
1083 strbuf_reset(&buf);
1084 strbuf_addf( &buf, "%s %s %s %s\n",
1085 r->peer_ref->name, sha1_to_hex(r->new_sha1),
1086 r->name, sha1_to_hex(r->old_sha1));
1087
1088 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1089 ret = -1;
1090 break;
1091 }
1092 }
1093
1094 strbuf_release(&buf);
1095
1096 x = close(proc.in);
1097 if (!ret)
1098 ret = x;
1099
1100 x = finish_command(&proc);
1101 if (!ret)
1102 ret = x;
1103
1104 return ret;
1105 }
1106
1107 int transport_push(struct transport *transport,
1108 int refspec_nr, const char **refspec, int flags,
1109 unsigned int *reject_reasons)
1110 {
1111 *reject_reasons = 0;
1112 transport_verify_remote_names(refspec_nr, refspec);
1113
1114 if (transport->push) {
1115 /* Maybe FIXME. But no important transport uses this case. */
1116 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1117 die("This transport does not support using --set-upstream");
1118
1119 return transport->push(transport, refspec_nr, refspec, flags);
1120 } else if (transport->push_refs) {
1121 struct ref *remote_refs =
1122 transport->get_refs_list(transport, 1);
1123 struct ref *local_refs = get_local_heads();
1124 int match_flags = MATCH_REFS_NONE;
1125 int verbose = (transport->verbose > 0);
1126 int quiet = (transport->verbose < 0);
1127 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1128 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1129 int push_ret, ret, err;
1130
1131 if (flags & TRANSPORT_PUSH_ALL)
1132 match_flags |= MATCH_REFS_ALL;
1133 if (flags & TRANSPORT_PUSH_MIRROR)
1134 match_flags |= MATCH_REFS_MIRROR;
1135 if (flags & TRANSPORT_PUSH_PRUNE)
1136 match_flags |= MATCH_REFS_PRUNE;
1137 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1138 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1139
1140 if (match_push_refs(local_refs, &remote_refs,
1141 refspec_nr, refspec, match_flags)) {
1142 return -1;
1143 }
1144
1145 if (transport->smart_options &&
1146 transport->smart_options->cas &&
1147 !is_empty_cas(transport->smart_options->cas))
1148 apply_push_cas(transport->smart_options->cas,
1149 transport->remote, remote_refs);
1150
1151 set_ref_status_for_push(remote_refs,
1152 flags & TRANSPORT_PUSH_MIRROR,
1153 flags & TRANSPORT_PUSH_FORCE);
1154
1155 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1156 if (run_pre_push_hook(transport, remote_refs))
1157 return -1;
1158
1159 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1160 struct ref *ref = remote_refs;
1161 for (; ref; ref = ref->next)
1162 if (!is_null_sha1(ref->new_sha1) &&
1163 !push_unpushed_submodules(ref->new_sha1,
1164 transport->remote->name))
1165 die ("Failed to push all needed submodules!");
1166 }
1167
1168 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1169 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1170 struct ref *ref = remote_refs;
1171 struct string_list needs_pushing;
1172
1173 memset(&needs_pushing, 0, sizeof(struct string_list));
1174 needs_pushing.strdup_strings = 1;
1175 for (; ref; ref = ref->next)
1176 if (!is_null_sha1(ref->new_sha1) &&
1177 find_unpushed_submodules(ref->new_sha1,
1178 transport->remote->name, &needs_pushing))
1179 die_with_unpushed_submodules(&needs_pushing);
1180 }
1181
1182 push_ret = transport->push_refs(transport, remote_refs, flags);
1183 err = push_had_errors(remote_refs);
1184 ret = push_ret | err;
1185
1186 if (!quiet || err)
1187 transport_print_push_status(transport->url, remote_refs,
1188 verbose | porcelain, porcelain,
1189 reject_reasons);
1190
1191 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1192 set_upstreams(transport, remote_refs, pretend);
1193
1194 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1195 struct ref *ref;
1196 for (ref = remote_refs; ref; ref = ref->next)
1197 transport_update_tracking_ref(transport->remote, ref, verbose);
1198 }
1199
1200 if (porcelain && !push_ret)
1201 puts("Done");
1202 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1203 fprintf(stderr, "Everything up-to-date\n");
1204
1205 return ret;
1206 }
1207 return 1;
1208 }
1209
1210 const struct ref *transport_get_remote_refs(struct transport *transport)
1211 {
1212 if (!transport->got_remote_refs) {
1213 transport->remote_refs = transport->get_refs_list(transport, 0);
1214 transport->got_remote_refs = 1;
1215 }
1216
1217 return transport->remote_refs;
1218 }
1219
1220 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1221 {
1222 int rc;
1223 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1224 struct ref **heads = NULL;
1225 struct ref *rm;
1226
1227 for (rm = refs; rm; rm = rm->next) {
1228 nr_refs++;
1229 if (rm->peer_ref &&
1230 !is_null_sha1(rm->old_sha1) &&
1231 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1232 continue;
1233 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1234 heads[nr_heads++] = rm;
1235 }
1236
1237 if (!nr_heads) {
1238 /*
1239 * When deepening of a shallow repository is requested,
1240 * then local and remote refs are likely to still be equal.
1241 * Just feed them all to the fetch method in that case.
1242 * This condition shouldn't be met in a non-deepening fetch
1243 * (see builtin/fetch.c:quickfetch()).
1244 */
1245 heads = xmalloc(nr_refs * sizeof(*heads));
1246 for (rm = refs; rm; rm = rm->next)
1247 heads[nr_heads++] = rm;
1248 }
1249
1250 rc = transport->fetch(transport, nr_heads, heads);
1251
1252 free(heads);
1253 return rc;
1254 }
1255
1256 void transport_unlock_pack(struct transport *transport)
1257 {
1258 if (transport->pack_lockfile) {
1259 unlink_or_warn(transport->pack_lockfile);
1260 free(transport->pack_lockfile);
1261 transport->pack_lockfile = NULL;
1262 }
1263 }
1264
1265 int transport_connect(struct transport *transport, const char *name,
1266 const char *exec, int fd[2])
1267 {
1268 if (transport->connect)
1269 return transport->connect(transport, name, exec, fd);
1270 else
1271 die("Operation not supported by protocol");
1272 }
1273
1274 int transport_disconnect(struct transport *transport)
1275 {
1276 int ret = 0;
1277 if (transport->disconnect)
1278 ret = transport->disconnect(transport);
1279 free(transport);
1280 return ret;
1281 }
1282
1283 /*
1284 * Strip username (and password) from a URL and return
1285 * it in a newly allocated string.
1286 */
1287 char *transport_anonymize_url(const char *url)
1288 {
1289 char *anon_url, *scheme_prefix, *anon_part;
1290 size_t anon_len, prefix_len = 0;
1291
1292 anon_part = strchr(url, '@');
1293 if (is_local(url) || !anon_part)
1294 goto literal_copy;
1295
1296 anon_len = strlen(++anon_part);
1297 scheme_prefix = strstr(url, "://");
1298 if (!scheme_prefix) {
1299 if (!strchr(anon_part, ':'))
1300 /* cannot be "me@there:/path/name" */
1301 goto literal_copy;
1302 } else {
1303 const char *cp;
1304 /* make sure scheme is reasonable */
1305 for (cp = url; cp < scheme_prefix; cp++) {
1306 switch (*cp) {
1307 /* RFC 1738 2.1 */
1308 case '+': case '.': case '-':
1309 break; /* ok */
1310 default:
1311 if (isalnum(*cp))
1312 break;
1313 /* it isn't */
1314 goto literal_copy;
1315 }
1316 }
1317 /* @ past the first slash does not count */
1318 cp = strchr(scheme_prefix + 3, '/');
1319 if (cp && cp < anon_part)
1320 goto literal_copy;
1321 prefix_len = scheme_prefix - url + 3;
1322 }
1323 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1324 memcpy(anon_url, url, prefix_len);
1325 memcpy(anon_url + prefix_len, anon_part, anon_len);
1326 return anon_url;
1327 literal_copy:
1328 return xstrdup(url);
1329 }
1330
1331 struct alternate_refs_data {
1332 alternate_ref_fn *fn;
1333 void *data;
1334 };
1335
1336 static int refs_from_alternate_cb(struct alternate_object_database *e,
1337 void *data)
1338 {
1339 char *other;
1340 size_t len;
1341 struct remote *remote;
1342 struct transport *transport;
1343 const struct ref *extra;
1344 struct alternate_refs_data *cb = data;
1345
1346 e->name[-1] = '\0';
1347 other = xstrdup(real_path(e->base));
1348 e->name[-1] = '/';
1349 len = strlen(other);
1350
1351 while (other[len-1] == '/')
1352 other[--len] = '\0';
1353 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1354 return 0;
1355 /* Is this a git repository with refs? */
1356 memcpy(other + len - 8, "/refs", 6);
1357 if (!is_directory(other))
1358 return 0;
1359 other[len - 8] = '\0';
1360 remote = remote_get(other);
1361 transport = transport_get(remote, other);
1362 for (extra = transport_get_remote_refs(transport);
1363 extra;
1364 extra = extra->next)
1365 cb->fn(extra, cb->data);
1366 transport_disconnect(transport);
1367 free(other);
1368 return 0;
1369 }
1370
1371 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1372 {
1373 struct alternate_refs_data cb;
1374 cb.fn = fn;
1375 cb.data = data;
1376 foreach_alt_odb(refs_from_alternate_cb, &cb);
1377 }
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