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Merge branch 'mh/write-refs-sooner-2.2' into mh/write-refs-sooner-2.3
[alt-git.git] / transport.c
blob88bde1d85e48e7866881806d1ec3f1e3d420ab67
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 #include "sha1-array.h"
18
19 /* rsync support */
20
21 /*
22 * We copy packed-refs and refs/ into a temporary file, then read the
23 * loose refs recursively (sorting whenever possible), and then inserting
24 * those packed refs that are not yet in the list (not validating, but
25 * assuming that the file is sorted).
26 *
27 * Appears refactoring this from refs.c is too cumbersome.
28 */
29
30 static int str_cmp(const void *a, const void *b)
31 {
32 const char *s1 = a;
33 const char *s2 = b;
34
35 return strcmp(s1, s2);
36 }
37
38 /* path->buf + name_offset is expected to point to "refs/" */
39
40 static int read_loose_refs(struct strbuf *path, int name_offset,
41 struct ref **tail)
42 {
43 DIR *dir = opendir(path->buf);
44 struct dirent *de;
45 struct {
46 char **entries;
47 int nr, alloc;
48 } list;
49 int i, pathlen;
50
51 if (!dir)
52 return -1;
53
54 memset (&list, 0, sizeof(list));
55
56 while ((de = readdir(dir))) {
57 if (is_dot_or_dotdot(de->d_name))
58 continue;
59 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
60 list.entries[list.nr++] = xstrdup(de->d_name);
61 }
62 closedir(dir);
63
64 /* sort the list */
65
66 qsort(list.entries, list.nr, sizeof(char *), str_cmp);
67
68 pathlen = path->len;
69 strbuf_addch(path, '/');
70
71 for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
72 strbuf_addstr(path, list.entries[i]);
73 if (read_loose_refs(path, name_offset, tail)) {
74 int fd = open(path->buf, O_RDONLY);
75 char buffer[40];
76 struct ref *next;
77
78 if (fd < 0)
79 continue;
80 next = alloc_ref(path->buf + name_offset);
81 if (read_in_full(fd, buffer, 40) != 40 ||
82 get_sha1_hex(buffer, next->old_sha1)) {
83 close(fd);
84 free(next);
85 continue;
86 }
87 close(fd);
88 (*tail)->next = next;
89 *tail = next;
90 }
91 }
92 strbuf_setlen(path, pathlen);
93
94 for (i = 0; i < list.nr; i++)
95 free(list.entries[i]);
96 free(list.entries);
97
98 return 0;
99 }
100
101 /* insert the packed refs for which no loose refs were found */
102
103 static void insert_packed_refs(const char *packed_refs, struct ref **list)
104 {
105 FILE *f = fopen(packed_refs, "r");
106 static char buffer[PATH_MAX];
107
108 if (!f)
109 return;
110
111 for (;;) {
112 int cmp = 0; /* assigned before used */
113 int len;
114
115 if (!fgets(buffer, sizeof(buffer), f)) {
116 fclose(f);
117 return;
118 }
119
120 if (!isxdigit(buffer[0]))
121 continue;
122 len = strlen(buffer);
123 if (len && buffer[len - 1] == '\n')
124 buffer[--len] = '\0';
125 if (len < 41)
126 continue;
127 while ((*list)->next &&
128 (cmp = strcmp(buffer + 41,
129 (*list)->next->name)) > 0)
130 list = &(*list)->next;
131 if (!(*list)->next || cmp < 0) {
132 struct ref *next = alloc_ref(buffer + 41);
133 buffer[40] = '\0';
134 if (get_sha1_hex(buffer, next->old_sha1)) {
135 warning ("invalid SHA-1: %s", buffer);
136 free(next);
137 continue;
138 }
139 next->next = (*list)->next;
140 (*list)->next = next;
141 list = &(*list)->next;
142 }
143 }
144 }
145
146 static void set_upstreams(struct transport *transport, struct ref *refs,
147 int pretend)
148 {
149 struct ref *ref;
150 for (ref = refs; ref; ref = ref->next) {
151 const char *localname;
152 const char *tmp;
153 const char *remotename;
154 unsigned char sha[20];
155 int flag = 0;
156 /*
157 * Check suitability for tracking. Must be successful /
158 * already up-to-date ref create/modify (not delete).
159 */
160 if (ref->status != REF_STATUS_OK &&
161 ref->status != REF_STATUS_UPTODATE)
162 continue;
163 if (!ref->peer_ref)
164 continue;
165 if (is_null_sha1(ref->new_sha1))
166 continue;
167
168 /* Follow symbolic refs (mainly for HEAD). */
169 localname = ref->peer_ref->name;
170 remotename = ref->name;
171 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
172 sha, &flag);
173 if (tmp && flag & REF_ISSYMREF &&
174 starts_with(tmp, "refs/heads/"))
175 localname = tmp;
176
177 /* Both source and destination must be local branches. */
178 if (!localname || !starts_with(localname, "refs/heads/"))
179 continue;
180 if (!remotename || !starts_with(remotename, "refs/heads/"))
181 continue;
182
183 if (!pretend)
184 install_branch_config(BRANCH_CONFIG_VERBOSE,
185 localname + 11, transport->remote->name,
186 remotename);
187 else
188 printf("Would set upstream of '%s' to '%s' of '%s'\n",
189 localname + 11, remotename + 11,
190 transport->remote->name);
191 }
192 }
193
194 static const char *rsync_url(const char *url)
195 {
196 if (!starts_with(url, "rsync://"))
197 skip_prefix(url, "rsync:", &url);
198 return url;
199 }
200
201 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
202 {
203 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
204 struct ref dummy = {NULL}, *tail = &dummy;
205 struct child_process rsync = CHILD_PROCESS_INIT;
206 const char *args[5];
207 int temp_dir_len;
208
209 if (for_push)
210 return NULL;
211
212 /* copy the refs to the temporary directory */
213
214 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
215 if (!mkdtemp(temp_dir.buf))
216 die_errno ("Could not make temporary directory");
217 temp_dir_len = temp_dir.len;
218
219 strbuf_addstr(&buf, rsync_url(transport->url));
220 strbuf_addstr(&buf, "/refs");
221
222 rsync.argv = args;
223 rsync.stdout_to_stderr = 1;
224 args[0] = "rsync";
225 args[1] = (transport->verbose > 1) ? "-rv" : "-r";
226 args[2] = buf.buf;
227 args[3] = temp_dir.buf;
228 args[4] = NULL;
229
230 if (run_command(&rsync))
231 die ("Could not run rsync to get refs");
232
233 strbuf_reset(&buf);
234 strbuf_addstr(&buf, rsync_url(transport->url));
235 strbuf_addstr(&buf, "/packed-refs");
236
237 args[2] = buf.buf;
238
239 if (run_command(&rsync))
240 die ("Could not run rsync to get refs");
241
242 /* read the copied refs */
243
244 strbuf_addstr(&temp_dir, "/refs");
245 read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
246 strbuf_setlen(&temp_dir, temp_dir_len);
247
248 tail = &dummy;
249 strbuf_addstr(&temp_dir, "/packed-refs");
250 insert_packed_refs(temp_dir.buf, &tail);
251 strbuf_setlen(&temp_dir, temp_dir_len);
252
253 if (remove_dir_recursively(&temp_dir, 0))
254 warning ("Error removing temporary directory %s.",
255 temp_dir.buf);
256
257 strbuf_release(&buf);
258 strbuf_release(&temp_dir);
259
260 return dummy.next;
261 }
262
263 static int fetch_objs_via_rsync(struct transport *transport,
264 int nr_objs, struct ref **to_fetch)
265 {
266 struct child_process rsync = CHILD_PROCESS_INIT;
267
268 rsync.stdout_to_stderr = 1;
269 argv_array_push(&rsync.args, "rsync");
270 argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
271 argv_array_push(&rsync.args, "--ignore-existing");
272 argv_array_push(&rsync.args, "--exclude");
273 argv_array_push(&rsync.args, "info");
274 argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
275 argv_array_push(&rsync.args, get_object_directory());
276
277 /* NEEDSWORK: handle one level of alternates */
278 return run_command(&rsync);
279 }
280
281 static int write_one_ref(const char *name, const unsigned char *sha1,
282 int flags, void *data)
283 {
284 struct strbuf *buf = data;
285 int len = buf->len;
286 FILE *f;
287
288 /* when called via for_each_ref(), flags is non-zero */
289 if (flags && !starts_with(name, "refs/heads/") &&
290 !starts_with(name, "refs/tags/"))
291 return 0;
292
293 strbuf_addstr(buf, name);
294 if (safe_create_leading_directories(buf->buf) ||
295 !(f = fopen(buf->buf, "w")) ||
296 fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
297 fclose(f))
298 return error("problems writing temporary file %s", buf->buf);
299 strbuf_setlen(buf, len);
300 return 0;
301 }
302
303 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
304 int refspec_nr, const char **refspec)
305 {
306 int i;
307
308 for (i = 0; i < refspec_nr; i++) {
309 unsigned char sha1[20];
310 char *ref;
311
312 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
313 return error("Could not get ref %s", refspec[i]);
314
315 if (write_one_ref(ref, sha1, 0, temp_dir)) {
316 free(ref);
317 return -1;
318 }
319 free(ref);
320 }
321 return 0;
322 }
323
324 static int rsync_transport_push(struct transport *transport,
325 int refspec_nr, const char **refspec, int flags)
326 {
327 struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
328 int result = 0, i;
329 struct child_process rsync = CHILD_PROCESS_INIT;
330 const char *args[10];
331
332 if (flags & TRANSPORT_PUSH_MIRROR)
333 return error("rsync transport does not support mirror mode");
334
335 /* first push the objects */
336
337 strbuf_addstr(&buf, rsync_url(transport->url));
338 strbuf_addch(&buf, '/');
339
340 rsync.argv = args;
341 rsync.stdout_to_stderr = 1;
342 i = 0;
343 args[i++] = "rsync";
344 args[i++] = "-a";
345 if (flags & TRANSPORT_PUSH_DRY_RUN)
346 args[i++] = "--dry-run";
347 if (transport->verbose > 1)
348 args[i++] = "-v";
349 args[i++] = "--ignore-existing";
350 args[i++] = "--exclude";
351 args[i++] = "info";
352 args[i++] = get_object_directory();
353 args[i++] = buf.buf;
354 args[i++] = NULL;
355
356 if (run_command(&rsync))
357 return error("Could not push objects to %s",
358 rsync_url(transport->url));
359
360 /* copy the refs to the temporary directory; they could be packed. */
361
362 strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
363 if (!mkdtemp(temp_dir.buf))
364 die_errno ("Could not make temporary directory");
365 strbuf_addch(&temp_dir, '/');
366
367 if (flags & TRANSPORT_PUSH_ALL) {
368 if (for_each_ref(write_one_ref, &temp_dir))
369 return -1;
370 } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
371 return -1;
372
373 i = 2;
374 if (flags & TRANSPORT_PUSH_DRY_RUN)
375 args[i++] = "--dry-run";
376 if (!(flags & TRANSPORT_PUSH_FORCE))
377 args[i++] = "--ignore-existing";
378 args[i++] = temp_dir.buf;
379 args[i++] = rsync_url(transport->url);
380 args[i++] = NULL;
381 if (run_command(&rsync))
382 result = error("Could not push to %s",
383 rsync_url(transport->url));
384
385 if (remove_dir_recursively(&temp_dir, 0))
386 warning ("Could not remove temporary directory %s.",
387 temp_dir.buf);
388
389 strbuf_release(&buf);
390 strbuf_release(&temp_dir);
391
392 return result;
393 }
394
395 struct bundle_transport_data {
396 int fd;
397 struct bundle_header header;
398 };
399
400 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
401 {
402 struct bundle_transport_data *data = transport->data;
403 struct ref *result = NULL;
404 int i;
405
406 if (for_push)
407 return NULL;
408
409 if (data->fd > 0)
410 close(data->fd);
411 data->fd = read_bundle_header(transport->url, &data->header);
412 if (data->fd < 0)
413 die ("Could not read bundle '%s'.", transport->url);
414 for (i = 0; i < data->header.references.nr; i++) {
415 struct ref_list_entry *e = data->header.references.list + i;
416 struct ref *ref = alloc_ref(e->name);
417 hashcpy(ref->old_sha1, e->sha1);
418 ref->next = result;
419 result = ref;
420 }
421 return result;
422 }
423
424 static int fetch_refs_from_bundle(struct transport *transport,
425 int nr_heads, struct ref **to_fetch)
426 {
427 struct bundle_transport_data *data = transport->data;
428 return unbundle(&data->header, data->fd,
429 transport->progress ? BUNDLE_VERBOSE : 0);
430 }
431
432 static int close_bundle(struct transport *transport)
433 {
434 struct bundle_transport_data *data = transport->data;
435 if (data->fd > 0)
436 close(data->fd);
437 free(data);
438 return 0;
439 }
440
441 struct git_transport_data {
442 struct git_transport_options options;
443 struct child_process *conn;
444 int fd[2];
445 unsigned got_remote_heads : 1;
446 struct sha1_array extra_have;
447 struct sha1_array shallow;
448 };
449
450 static int set_git_option(struct git_transport_options *opts,
451 const char *name, const char *value)
452 {
453 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
454 opts->uploadpack = value;
455 return 0;
456 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
457 opts->receivepack = value;
458 return 0;
459 } else if (!strcmp(name, TRANS_OPT_THIN)) {
460 opts->thin = !!value;
461 return 0;
462 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
463 opts->followtags = !!value;
464 return 0;
465 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
466 opts->keep = !!value;
467 return 0;
468 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
469 opts->update_shallow = !!value;
470 return 0;
471 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
472 if (!value)
473 opts->depth = 0;
474 else {
475 char *end;
476 opts->depth = strtol(value, &end, 0);
477 if (*end)
478 die("transport: invalid depth option '%s'", value);
479 }
480 return 0;
481 } else if (!strcmp(name, TRANS_OPT_PUSH_CERT)) {
482 opts->push_cert = !!value;
483 return 0;
484 }
485 return 1;
486 }
487
488 static int connect_setup(struct transport *transport, int for_push, int verbose)
489 {
490 struct git_transport_data *data = transport->data;
491
492 if (data->conn)
493 return 0;
494
495 data->conn = git_connect(data->fd, transport->url,
496 for_push ? data->options.receivepack :
497 data->options.uploadpack,
498 verbose ? CONNECT_VERBOSE : 0);
499
500 return 0;
501 }
502
503 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
504 {
505 struct git_transport_data *data = transport->data;
506 struct ref *refs;
507
508 connect_setup(transport, for_push, 0);
509 get_remote_heads(data->fd[0], NULL, 0, &refs,
510 for_push ? REF_NORMAL : 0,
511 &data->extra_have,
512 &data->shallow);
513 data->got_remote_heads = 1;
514
515 return refs;
516 }
517
518 static int fetch_refs_via_pack(struct transport *transport,
519 int nr_heads, struct ref **to_fetch)
520 {
521 struct git_transport_data *data = transport->data;
522 struct ref *refs;
523 char *dest = xstrdup(transport->url);
524 struct fetch_pack_args args;
525 struct ref *refs_tmp = NULL;
526
527 memset(&args, 0, sizeof(args));
528 args.uploadpack = data->options.uploadpack;
529 args.keep_pack = data->options.keep;
530 args.lock_pack = 1;
531 args.use_thin_pack = data->options.thin;
532 args.include_tag = data->options.followtags;
533 args.verbose = (transport->verbose > 1);
534 args.quiet = (transport->verbose < 0);
535 args.no_progress = !transport->progress;
536 args.depth = data->options.depth;
537 args.check_self_contained_and_connected =
538 data->options.check_self_contained_and_connected;
539 args.cloning = transport->cloning;
540 args.update_shallow = data->options.update_shallow;
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,
545 NULL, &data->shallow);
546 data->got_remote_heads = 1;
547 }
548
549 refs = fetch_pack(&args, data->fd, data->conn,
550 refs_tmp ? refs_tmp : transport->remote_refs,
551 dest, to_fetch, nr_heads, &data->shallow,
552 &transport->pack_lockfile);
553 close(data->fd[0]);
554 close(data->fd[1]);
555 if (finish_connect(data->conn)) {
556 free_refs(refs);
557 refs = NULL;
558 }
559 data->conn = NULL;
560 data->got_remote_heads = 0;
561 data->options.self_contained_and_connected =
562 args.self_contained_and_connected;
563
564 free_refs(refs_tmp);
565 free_refs(refs);
566 free(dest);
567 return (refs ? 0 : -1);
568 }
569
570 static int push_had_errors(struct ref *ref)
571 {
572 for (; ref; ref = ref->next) {
573 switch (ref->status) {
574 case REF_STATUS_NONE:
575 case REF_STATUS_UPTODATE:
576 case REF_STATUS_OK:
577 break;
578 default:
579 return 1;
580 }
581 }
582 return 0;
583 }
584
585 int transport_refs_pushed(struct ref *ref)
586 {
587 for (; ref; ref = ref->next) {
588 switch(ref->status) {
589 case REF_STATUS_NONE:
590 case REF_STATUS_UPTODATE:
591 break;
592 default:
593 return 1;
594 }
595 }
596 return 0;
597 }
598
599 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
600 {
601 struct refspec rs;
602
603 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
604 return;
605
606 rs.src = ref->name;
607 rs.dst = NULL;
608
609 if (!remote_find_tracking(remote, &rs)) {
610 if (verbose)
611 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
612 if (ref->deletion) {
613 delete_ref(rs.dst, NULL, 0);
614 } else
615 update_ref("update by push", rs.dst,
616 ref->new_sha1, NULL, 0, 0);
617 free(rs.dst);
618 }
619 }
620
621 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
622 {
623 if (porcelain) {
624 if (from)
625 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
626 else
627 fprintf(stdout, "%c\t:%s\t", flag, to->name);
628 if (msg)
629 fprintf(stdout, "%s (%s)\n", summary, msg);
630 else
631 fprintf(stdout, "%s\n", summary);
632 } else {
633 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
634 if (from)
635 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
636 else
637 fputs(prettify_refname(to->name), stderr);
638 if (msg) {
639 fputs(" (", stderr);
640 fputs(msg, stderr);
641 fputc(')', stderr);
642 }
643 fputc('\n', stderr);
644 }
645 }
646
647 static const char *status_abbrev(unsigned char sha1[20])
648 {
649 return find_unique_abbrev(sha1, DEFAULT_ABBREV);
650 }
651
652 static void print_ok_ref_status(struct ref *ref, int porcelain)
653 {
654 if (ref->deletion)
655 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
656 else if (is_null_sha1(ref->old_sha1))
657 print_ref_status('*',
658 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
659 "[new branch]"),
660 ref, ref->peer_ref, NULL, porcelain);
661 else {
662 char quickref[84];
663 char type;
664 const char *msg;
665
666 strcpy(quickref, status_abbrev(ref->old_sha1));
667 if (ref->forced_update) {
668 strcat(quickref, "...");
669 type = '+';
670 msg = "forced update";
671 } else {
672 strcat(quickref, "..");
673 type = ' ';
674 msg = NULL;
675 }
676 strcat(quickref, status_abbrev(ref->new_sha1));
677
678 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
679 }
680 }
681
682 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
683 {
684 if (!count)
685 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
686
687 switch(ref->status) {
688 case REF_STATUS_NONE:
689 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
690 break;
691 case REF_STATUS_REJECT_NODELETE:
692 print_ref_status('!', "[rejected]", ref, NULL,
693 "remote does not support deleting refs", porcelain);
694 break;
695 case REF_STATUS_UPTODATE:
696 print_ref_status('=', "[up to date]", ref,
697 ref->peer_ref, NULL, porcelain);
698 break;
699 case REF_STATUS_REJECT_NONFASTFORWARD:
700 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
701 "non-fast-forward", porcelain);
702 break;
703 case REF_STATUS_REJECT_ALREADY_EXISTS:
704 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
705 "already exists", porcelain);
706 break;
707 case REF_STATUS_REJECT_FETCH_FIRST:
708 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
709 "fetch first", porcelain);
710 break;
711 case REF_STATUS_REJECT_NEEDS_FORCE:
712 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
713 "needs force", porcelain);
714 break;
715 case REF_STATUS_REJECT_STALE:
716 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
717 "stale info", porcelain);
718 break;
719 case REF_STATUS_REJECT_SHALLOW:
720 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
721 "new shallow roots not allowed", porcelain);
722 break;
723 case REF_STATUS_REMOTE_REJECT:
724 print_ref_status('!', "[remote rejected]", ref,
725 ref->deletion ? NULL : ref->peer_ref,
726 ref->remote_status, porcelain);
727 break;
728 case REF_STATUS_EXPECTING_REPORT:
729 print_ref_status('!', "[remote failure]", ref,
730 ref->deletion ? NULL : ref->peer_ref,
731 "remote failed to report status", porcelain);
732 break;
733 case REF_STATUS_OK:
734 print_ok_ref_status(ref, porcelain);
735 break;
736 }
737
738 return 1;
739 }
740
741 void transport_print_push_status(const char *dest, struct ref *refs,
742 int verbose, int porcelain, unsigned int *reject_reasons)
743 {
744 struct ref *ref;
745 int n = 0;
746 unsigned char head_sha1[20];
747 char *head;
748
749 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
750
751 if (verbose) {
752 for (ref = refs; ref; ref = ref->next)
753 if (ref->status == REF_STATUS_UPTODATE)
754 n += print_one_push_status(ref, dest, n, porcelain);
755 }
756
757 for (ref = refs; ref; ref = ref->next)
758 if (ref->status == REF_STATUS_OK)
759 n += print_one_push_status(ref, dest, n, porcelain);
760
761 *reject_reasons = 0;
762 for (ref = refs; ref; ref = ref->next) {
763 if (ref->status != REF_STATUS_NONE &&
764 ref->status != REF_STATUS_UPTODATE &&
765 ref->status != REF_STATUS_OK)
766 n += print_one_push_status(ref, dest, n, porcelain);
767 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
768 if (head != NULL && !strcmp(head, ref->name))
769 *reject_reasons |= REJECT_NON_FF_HEAD;
770 else
771 *reject_reasons |= REJECT_NON_FF_OTHER;
772 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
773 *reject_reasons |= REJECT_ALREADY_EXISTS;
774 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
775 *reject_reasons |= REJECT_FETCH_FIRST;
776 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
777 *reject_reasons |= REJECT_NEEDS_FORCE;
778 }
779 }
780 free(head);
781 }
782
783 void transport_verify_remote_names(int nr_heads, const char **heads)
784 {
785 int i;
786
787 for (i = 0; i < nr_heads; i++) {
788 const char *local = heads[i];
789 const char *remote = strrchr(heads[i], ':');
790
791 if (*local == '+')
792 local++;
793
794 /* A matching refspec is okay. */
795 if (remote == local && remote[1] == '\0')
796 continue;
797
798 remote = remote ? (remote + 1) : local;
799 if (check_refname_format(remote,
800 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
801 die("remote part of refspec is not a valid name in %s",
802 heads[i]);
803 }
804 }
805
806 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
807 {
808 struct git_transport_data *data = transport->data;
809 struct send_pack_args args;
810 int ret;
811
812 if (!data->got_remote_heads) {
813 struct ref *tmp_refs;
814 connect_setup(transport, 1, 0);
815
816 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
817 NULL, &data->shallow);
818 data->got_remote_heads = 1;
819 }
820
821 memset(&args, 0, sizeof(args));
822 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
823 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
824 args.use_thin_pack = data->options.thin;
825 args.verbose = (transport->verbose > 0);
826 args.quiet = (transport->verbose < 0);
827 args.progress = transport->progress;
828 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
829 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
830 args.push_cert = !!(flags & TRANSPORT_PUSH_CERT);
831 args.url = transport->url;
832
833 ret = send_pack(&args, data->fd, data->conn, remote_refs,
834 &data->extra_have);
835
836 close(data->fd[1]);
837 close(data->fd[0]);
838 ret |= finish_connect(data->conn);
839 data->conn = NULL;
840 data->got_remote_heads = 0;
841
842 return ret;
843 }
844
845 static int connect_git(struct transport *transport, const char *name,
846 const char *executable, int fd[2])
847 {
848 struct git_transport_data *data = transport->data;
849 data->conn = git_connect(data->fd, transport->url,
850 executable, 0);
851 fd[0] = data->fd[0];
852 fd[1] = data->fd[1];
853 return 0;
854 }
855
856 static int disconnect_git(struct transport *transport)
857 {
858 struct git_transport_data *data = transport->data;
859 if (data->conn) {
860 if (data->got_remote_heads)
861 packet_flush(data->fd[1]);
862 close(data->fd[0]);
863 close(data->fd[1]);
864 finish_connect(data->conn);
865 }
866
867 free(data);
868 return 0;
869 }
870
871 void transport_take_over(struct transport *transport,
872 struct child_process *child)
873 {
874 struct git_transport_data *data;
875
876 if (!transport->smart_options)
877 die("Bug detected: Taking over transport requires non-NULL "
878 "smart_options field.");
879
880 data = xcalloc(1, sizeof(*data));
881 data->options = *transport->smart_options;
882 data->conn = child;
883 data->fd[0] = data->conn->out;
884 data->fd[1] = data->conn->in;
885 data->got_remote_heads = 0;
886 transport->data = data;
887
888 transport->set_option = NULL;
889 transport->get_refs_list = get_refs_via_connect;
890 transport->fetch = fetch_refs_via_pack;
891 transport->push = NULL;
892 transport->push_refs = git_transport_push;
893 transport->disconnect = disconnect_git;
894 transport->smart_options = &(data->options);
895
896 transport->cannot_reuse = 1;
897 }
898
899 static int is_file(const char *url)
900 {
901 struct stat buf;
902 if (stat(url, &buf))
903 return 0;
904 return S_ISREG(buf.st_mode);
905 }
906
907 static int external_specification_len(const char *url)
908 {
909 return strchr(url, ':') - url;
910 }
911
912 struct transport *transport_get(struct remote *remote, const char *url)
913 {
914 const char *helper;
915 struct transport *ret = xcalloc(1, sizeof(*ret));
916
917 ret->progress = isatty(2);
918
919 if (!remote)
920 die("No remote provided to transport_get()");
921
922 ret->got_remote_refs = 0;
923 ret->remote = remote;
924 helper = remote->foreign_vcs;
925
926 if (!url && remote->url)
927 url = remote->url[0];
928 ret->url = url;
929
930 /* maybe it is a foreign URL? */
931 if (url) {
932 const char *p = url;
933
934 while (is_urlschemechar(p == url, *p))
935 p++;
936 if (starts_with(p, "::"))
937 helper = xstrndup(url, p - url);
938 }
939
940 if (helper) {
941 transport_helper_init(ret, helper);
942 } else if (starts_with(url, "rsync:")) {
943 ret->get_refs_list = get_refs_via_rsync;
944 ret->fetch = fetch_objs_via_rsync;
945 ret->push = rsync_transport_push;
946 ret->smart_options = NULL;
947 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
948 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
949 ret->data = data;
950 ret->get_refs_list = get_refs_from_bundle;
951 ret->fetch = fetch_refs_from_bundle;
952 ret->disconnect = close_bundle;
953 ret->smart_options = NULL;
954 } else if (!is_url(url)
955 || starts_with(url, "file://")
956 || starts_with(url, "git://")
957 || starts_with(url, "ssh://")
958 || starts_with(url, "git+ssh://")
959 || starts_with(url, "ssh+git://")) {
960 /* These are builtin smart transports. */
961 struct git_transport_data *data = xcalloc(1, sizeof(*data));
962 ret->data = data;
963 ret->set_option = NULL;
964 ret->get_refs_list = get_refs_via_connect;
965 ret->fetch = fetch_refs_via_pack;
966 ret->push_refs = git_transport_push;
967 ret->connect = connect_git;
968 ret->disconnect = disconnect_git;
969 ret->smart_options = &(data->options);
970
971 data->conn = NULL;
972 data->got_remote_heads = 0;
973 } else {
974 /* Unknown protocol in URL. Pass to external handler. */
975 int len = external_specification_len(url);
976 char *handler = xmemdupz(url, len);
977 transport_helper_init(ret, handler);
978 }
979
980 if (ret->smart_options) {
981 ret->smart_options->thin = 1;
982 ret->smart_options->uploadpack = "git-upload-pack";
983 if (remote->uploadpack)
984 ret->smart_options->uploadpack = remote->uploadpack;
985 ret->smart_options->receivepack = "git-receive-pack";
986 if (remote->receivepack)
987 ret->smart_options->receivepack = remote->receivepack;
988 }
989
990 return ret;
991 }
992
993 int transport_set_option(struct transport *transport,
994 const char *name, const char *value)
995 {
996 int git_reports = 1, protocol_reports = 1;
997
998 if (transport->smart_options)
999 git_reports = set_git_option(transport->smart_options,
1000 name, value);
1001
1002 if (transport->set_option)
1003 protocol_reports = transport->set_option(transport, name,
1004 value);
1005
1006 /* If either report is 0, report 0 (success). */
1007 if (!git_reports || !protocol_reports)
1008 return 0;
1009 /* If either reports -1 (invalid value), report -1. */
1010 if ((git_reports == -1) || (protocol_reports == -1))
1011 return -1;
1012 /* Otherwise if both report unknown, report unknown. */
1013 return 1;
1014 }
1015
1016 void transport_set_verbosity(struct transport *transport, int verbosity,
1017 int force_progress)
1018 {
1019 if (verbosity >= 1)
1020 transport->verbose = verbosity <= 3 ? verbosity : 3;
1021 if (verbosity < 0)
1022 transport->verbose = -1;
1023
1024 /**
1025 * Rules used to determine whether to report progress (processing aborts
1026 * when a rule is satisfied):
1027 *
1028 * . Report progress, if force_progress is 1 (ie. --progress).
1029 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1030 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1031 * . Report progress if isatty(2) is 1.
1032 **/
1033 if (force_progress >= 0)
1034 transport->progress = !!force_progress;
1035 else
1036 transport->progress = verbosity >= 0 && isatty(2);
1037 }
1038
1039 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1040 {
1041 int i;
1042
1043 fprintf(stderr, "The following submodule paths contain changes that can\n"
1044 "not be found on any remote:\n");
1045 for (i = 0; i < needs_pushing->nr; i++)
1046 printf(" %s\n", needs_pushing->items[i].string);
1047 fprintf(stderr, "\nPlease try\n\n"
1048 " git push --recurse-submodules=on-demand\n\n"
1049 "or cd to the path and use\n\n"
1050 " git push\n\n"
1051 "to push them to a remote.\n\n");
1052
1053 string_list_clear(needs_pushing, 0);
1054
1055 die("Aborting.");
1056 }
1057
1058 static int run_pre_push_hook(struct transport *transport,
1059 struct ref *remote_refs)
1060 {
1061 int ret = 0, x;
1062 struct ref *r;
1063 struct child_process proc = CHILD_PROCESS_INIT;
1064 struct strbuf buf;
1065 const char *argv[4];
1066
1067 if (!(argv[0] = find_hook("pre-push")))
1068 return 0;
1069
1070 argv[1] = transport->remote->name;
1071 argv[2] = transport->url;
1072 argv[3] = NULL;
1073
1074 proc.argv = argv;
1075 proc.in = -1;
1076
1077 if (start_command(&proc)) {
1078 finish_command(&proc);
1079 return -1;
1080 }
1081
1082 strbuf_init(&buf, 256);
1083
1084 for (r = remote_refs; r; r = r->next) {
1085 if (!r->peer_ref) continue;
1086 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1087 if (r->status == REF_STATUS_REJECT_STALE) continue;
1088 if (r->status == REF_STATUS_UPTODATE) continue;
1089
1090 strbuf_reset(&buf);
1091 strbuf_addf( &buf, "%s %s %s %s\n",
1092 r->peer_ref->name, sha1_to_hex(r->new_sha1),
1093 r->name, sha1_to_hex(r->old_sha1));
1094
1095 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1096 ret = -1;
1097 break;
1098 }
1099 }
1100
1101 strbuf_release(&buf);
1102
1103 x = close(proc.in);
1104 if (!ret)
1105 ret = x;
1106
1107 x = finish_command(&proc);
1108 if (!ret)
1109 ret = x;
1110
1111 return ret;
1112 }
1113
1114 int transport_push(struct transport *transport,
1115 int refspec_nr, const char **refspec, int flags,
1116 unsigned int *reject_reasons)
1117 {
1118 *reject_reasons = 0;
1119 transport_verify_remote_names(refspec_nr, refspec);
1120
1121 if (transport->push) {
1122 /* Maybe FIXME. But no important transport uses this case. */
1123 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1124 die("This transport does not support using --set-upstream");
1125
1126 return transport->push(transport, refspec_nr, refspec, flags);
1127 } else if (transport->push_refs) {
1128 struct ref *remote_refs;
1129 struct ref *local_refs = get_local_heads();
1130 int match_flags = MATCH_REFS_NONE;
1131 int verbose = (transport->verbose > 0);
1132 int quiet = (transport->verbose < 0);
1133 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1134 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1135 int push_ret, ret, err;
1136
1137 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1138 return -1;
1139
1140 remote_refs = transport->get_refs_list(transport, 1);
1141
1142 if (flags & TRANSPORT_PUSH_ALL)
1143 match_flags |= MATCH_REFS_ALL;
1144 if (flags & TRANSPORT_PUSH_MIRROR)
1145 match_flags |= MATCH_REFS_MIRROR;
1146 if (flags & TRANSPORT_PUSH_PRUNE)
1147 match_flags |= MATCH_REFS_PRUNE;
1148 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1149 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1150
1151 if (match_push_refs(local_refs, &remote_refs,
1152 refspec_nr, refspec, match_flags)) {
1153 return -1;
1154 }
1155
1156 if (transport->smart_options &&
1157 transport->smart_options->cas &&
1158 !is_empty_cas(transport->smart_options->cas))
1159 apply_push_cas(transport->smart_options->cas,
1160 transport->remote, remote_refs);
1161
1162 set_ref_status_for_push(remote_refs,
1163 flags & TRANSPORT_PUSH_MIRROR,
1164 flags & TRANSPORT_PUSH_FORCE);
1165
1166 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1167 if (run_pre_push_hook(transport, remote_refs))
1168 return -1;
1169
1170 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1171 struct ref *ref = remote_refs;
1172 for (; ref; ref = ref->next)
1173 if (!is_null_sha1(ref->new_sha1) &&
1174 !push_unpushed_submodules(ref->new_sha1,
1175 transport->remote->name))
1176 die ("Failed to push all needed submodules!");
1177 }
1178
1179 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1180 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1181 struct ref *ref = remote_refs;
1182 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1183
1184 for (; ref; ref = ref->next)
1185 if (!is_null_sha1(ref->new_sha1) &&
1186 find_unpushed_submodules(ref->new_sha1,
1187 transport->remote->name, &needs_pushing))
1188 die_with_unpushed_submodules(&needs_pushing);
1189 }
1190
1191 push_ret = transport->push_refs(transport, remote_refs, flags);
1192 err = push_had_errors(remote_refs);
1193 ret = push_ret | err;
1194
1195 if (!quiet || err)
1196 transport_print_push_status(transport->url, remote_refs,
1197 verbose | porcelain, porcelain,
1198 reject_reasons);
1199
1200 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1201 set_upstreams(transport, remote_refs, pretend);
1202
1203 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1204 struct ref *ref;
1205 for (ref = remote_refs; ref; ref = ref->next)
1206 transport_update_tracking_ref(transport->remote, ref, verbose);
1207 }
1208
1209 if (porcelain && !push_ret)
1210 puts("Done");
1211 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1212 fprintf(stderr, "Everything up-to-date\n");
1213
1214 return ret;
1215 }
1216 return 1;
1217 }
1218
1219 const struct ref *transport_get_remote_refs(struct transport *transport)
1220 {
1221 if (!transport->got_remote_refs) {
1222 transport->remote_refs = transport->get_refs_list(transport, 0);
1223 transport->got_remote_refs = 1;
1224 }
1225
1226 return transport->remote_refs;
1227 }
1228
1229 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1230 {
1231 int rc;
1232 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1233 struct ref **heads = NULL;
1234 struct ref *rm;
1235
1236 for (rm = refs; rm; rm = rm->next) {
1237 nr_refs++;
1238 if (rm->peer_ref &&
1239 !is_null_sha1(rm->old_sha1) &&
1240 !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1241 continue;
1242 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1243 heads[nr_heads++] = rm;
1244 }
1245
1246 if (!nr_heads) {
1247 /*
1248 * When deepening of a shallow repository is requested,
1249 * then local and remote refs are likely to still be equal.
1250 * Just feed them all to the fetch method in that case.
1251 * This condition shouldn't be met in a non-deepening fetch
1252 * (see builtin/fetch.c:quickfetch()).
1253 */
1254 heads = xmalloc(nr_refs * sizeof(*heads));
1255 for (rm = refs; rm; rm = rm->next)
1256 heads[nr_heads++] = rm;
1257 }
1258
1259 rc = transport->fetch(transport, nr_heads, heads);
1260
1261 free(heads);
1262 return rc;
1263 }
1264
1265 void transport_unlock_pack(struct transport *transport)
1266 {
1267 if (transport->pack_lockfile) {
1268 unlink_or_warn(transport->pack_lockfile);
1269 free(transport->pack_lockfile);
1270 transport->pack_lockfile = NULL;
1271 }
1272 }
1273
1274 int transport_connect(struct transport *transport, const char *name,
1275 const char *exec, int fd[2])
1276 {
1277 if (transport->connect)
1278 return transport->connect(transport, name, exec, fd);
1279 else
1280 die("Operation not supported by protocol");
1281 }
1282
1283 int transport_disconnect(struct transport *transport)
1284 {
1285 int ret = 0;
1286 if (transport->disconnect)
1287 ret = transport->disconnect(transport);
1288 free(transport);
1289 return ret;
1290 }
1291
1292 /*
1293 * Strip username (and password) from a URL and return
1294 * it in a newly allocated string.
1295 */
1296 char *transport_anonymize_url(const char *url)
1297 {
1298 char *anon_url, *scheme_prefix, *anon_part;
1299 size_t anon_len, prefix_len = 0;
1300
1301 anon_part = strchr(url, '@');
1302 if (url_is_local_not_ssh(url) || !anon_part)
1303 goto literal_copy;
1304
1305 anon_len = strlen(++anon_part);
1306 scheme_prefix = strstr(url, "://");
1307 if (!scheme_prefix) {
1308 if (!strchr(anon_part, ':'))
1309 /* cannot be "me@there:/path/name" */
1310 goto literal_copy;
1311 } else {
1312 const char *cp;
1313 /* make sure scheme is reasonable */
1314 for (cp = url; cp < scheme_prefix; cp++) {
1315 switch (*cp) {
1316 /* RFC 1738 2.1 */
1317 case '+': case '.': case '-':
1318 break; /* ok */
1319 default:
1320 if (isalnum(*cp))
1321 break;
1322 /* it isn't */
1323 goto literal_copy;
1324 }
1325 }
1326 /* @ past the first slash does not count */
1327 cp = strchr(scheme_prefix + 3, '/');
1328 if (cp && cp < anon_part)
1329 goto literal_copy;
1330 prefix_len = scheme_prefix - url + 3;
1331 }
1332 anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1333 memcpy(anon_url, url, prefix_len);
1334 memcpy(anon_url + prefix_len, anon_part, anon_len);
1335 return anon_url;
1336 literal_copy:
1337 return xstrdup(url);
1338 }
1339
1340 struct alternate_refs_data {
1341 alternate_ref_fn *fn;
1342 void *data;
1343 };
1344
1345 static int refs_from_alternate_cb(struct alternate_object_database *e,
1346 void *data)
1347 {
1348 char *other;
1349 size_t len;
1350 struct remote *remote;
1351 struct transport *transport;
1352 const struct ref *extra;
1353 struct alternate_refs_data *cb = data;
1354
1355 e->name[-1] = '\0';
1356 other = xstrdup(real_path(e->base));
1357 e->name[-1] = '/';
1358 len = strlen(other);
1359
1360 while (other[len-1] == '/')
1361 other[--len] = '\0';
1362 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1363 goto out;
1364 /* Is this a git repository with refs? */
1365 memcpy(other + len - 8, "/refs", 6);
1366 if (!is_directory(other))
1367 goto out;
1368 other[len - 8] = '\0';
1369 remote = remote_get(other);
1370 transport = transport_get(remote, other);
1371 for (extra = transport_get_remote_refs(transport);
1372 extra;
1373 extra = extra->next)
1374 cb->fn(extra, cb->data);
1375 transport_disconnect(transport);
1376 out:
1377 free(other);
1378 return 0;
1379 }
1380
1381 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1382 {
1383 struct alternate_refs_data cb;
1384 cb.fn = fn;
1385 cb.data = data;
1386 foreach_alt_odb(refs_from_alternate_cb, &cb);
1387 }
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