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real_path: prevent redefinition of MAXSYMLINKS
[alt-git.git] / transport.c
blob236c6f6b095ad508c57e6ff1048d3b7ca623ca2e
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 #include "sigchain.h"
19
20 static void set_upstreams(struct transport *transport, struct ref *refs,
21 int pretend)
22 {
23 struct ref *ref;
24 for (ref = refs; ref; ref = ref->next) {
25 const char *localname;
26 const char *tmp;
27 const char *remotename;
28 unsigned char sha[20];
29 int flag = 0;
30 /*
31 * Check suitability for tracking. Must be successful /
32 * already up-to-date ref create/modify (not delete).
33 */
34 if (ref->status != REF_STATUS_OK &&
35 ref->status != REF_STATUS_UPTODATE)
36 continue;
37 if (!ref->peer_ref)
38 continue;
39 if (is_null_oid(&ref->new_oid))
40 continue;
41
42 /* Follow symbolic refs (mainly for HEAD). */
43 localname = ref->peer_ref->name;
44 remotename = ref->name;
45 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
46 sha, &flag);
47 if (tmp && flag & REF_ISSYMREF &&
48 starts_with(tmp, "refs/heads/"))
49 localname = tmp;
50
51 /* Both source and destination must be local branches. */
52 if (!localname || !starts_with(localname, "refs/heads/"))
53 continue;
54 if (!remotename || !starts_with(remotename, "refs/heads/"))
55 continue;
56
57 if (!pretend)
58 install_branch_config(BRANCH_CONFIG_VERBOSE,
59 localname + 11, transport->remote->name,
60 remotename);
61 else
62 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
63 localname + 11, remotename + 11,
64 transport->remote->name);
65 }
66 }
67
68 struct bundle_transport_data {
69 int fd;
70 struct bundle_header header;
71 };
72
73 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
74 {
75 struct bundle_transport_data *data = transport->data;
76 struct ref *result = NULL;
77 int i;
78
79 if (for_push)
80 return NULL;
81
82 if (data->fd > 0)
83 close(data->fd);
84 data->fd = read_bundle_header(transport->url, &data->header);
85 if (data->fd < 0)
86 die ("Could not read bundle '%s'.", transport->url);
87 for (i = 0; i < data->header.references.nr; i++) {
88 struct ref_list_entry *e = data->header.references.list + i;
89 struct ref *ref = alloc_ref(e->name);
90 hashcpy(ref->old_oid.hash, e->sha1);
91 ref->next = result;
92 result = ref;
93 }
94 return result;
95 }
96
97 static int fetch_refs_from_bundle(struct transport *transport,
98 int nr_heads, struct ref **to_fetch)
99 {
100 struct bundle_transport_data *data = transport->data;
101 return unbundle(&data->header, data->fd,
102 transport->progress ? BUNDLE_VERBOSE : 0);
103 }
104
105 static int close_bundle(struct transport *transport)
106 {
107 struct bundle_transport_data *data = transport->data;
108 if (data->fd > 0)
109 close(data->fd);
110 free(data);
111 return 0;
112 }
113
114 struct git_transport_data {
115 struct git_transport_options options;
116 struct child_process *conn;
117 int fd[2];
118 unsigned got_remote_heads : 1;
119 struct sha1_array extra_have;
120 struct sha1_array shallow;
121 };
122
123 static int set_git_option(struct git_transport_options *opts,
124 const char *name, const char *value)
125 {
126 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
127 opts->uploadpack = value;
128 return 0;
129 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
130 opts->receivepack = value;
131 return 0;
132 } else if (!strcmp(name, TRANS_OPT_THIN)) {
133 opts->thin = !!value;
134 return 0;
135 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
136 opts->followtags = !!value;
137 return 0;
138 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
139 opts->keep = !!value;
140 return 0;
141 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
142 opts->update_shallow = !!value;
143 return 0;
144 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
145 if (!value)
146 opts->depth = 0;
147 else {
148 char *end;
149 opts->depth = strtol(value, &end, 0);
150 if (*end)
151 die(_("transport: invalid depth option '%s'"), value);
152 }
153 return 0;
154 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
155 opts->deepen_since = value;
156 return 0;
157 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
158 opts->deepen_not = (const struct string_list *)value;
159 return 0;
160 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
161 opts->deepen_relative = !!value;
162 return 0;
163 }
164 return 1;
165 }
166
167 static int connect_setup(struct transport *transport, int for_push)
168 {
169 struct git_transport_data *data = transport->data;
170 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
171
172 if (data->conn)
173 return 0;
174
175 switch (transport->family) {
176 case TRANSPORT_FAMILY_ALL: break;
177 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
178 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
179 }
180
181 data->conn = git_connect(data->fd, transport->url,
182 for_push ? data->options.receivepack :
183 data->options.uploadpack,
184 flags);
185
186 return 0;
187 }
188
189 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
190 {
191 struct git_transport_data *data = transport->data;
192 struct ref *refs;
193
194 connect_setup(transport, for_push);
195 get_remote_heads(data->fd[0], NULL, 0, &refs,
196 for_push ? REF_NORMAL : 0,
197 &data->extra_have,
198 &data->shallow);
199 data->got_remote_heads = 1;
200
201 return refs;
202 }
203
204 static int fetch_refs_via_pack(struct transport *transport,
205 int nr_heads, struct ref **to_fetch)
206 {
207 struct git_transport_data *data = transport->data;
208 struct ref *refs;
209 char *dest = xstrdup(transport->url);
210 struct fetch_pack_args args;
211 struct ref *refs_tmp = NULL;
212
213 memset(&args, 0, sizeof(args));
214 args.uploadpack = data->options.uploadpack;
215 args.keep_pack = data->options.keep;
216 args.lock_pack = 1;
217 args.use_thin_pack = data->options.thin;
218 args.include_tag = data->options.followtags;
219 args.verbose = (transport->verbose > 1);
220 args.quiet = (transport->verbose < 0);
221 args.no_progress = !transport->progress;
222 args.depth = data->options.depth;
223 args.deepen_since = data->options.deepen_since;
224 args.deepen_not = data->options.deepen_not;
225 args.deepen_relative = data->options.deepen_relative;
226 args.check_self_contained_and_connected =
227 data->options.check_self_contained_and_connected;
228 args.cloning = transport->cloning;
229 args.update_shallow = data->options.update_shallow;
230
231 if (!data->got_remote_heads) {
232 connect_setup(transport, 0);
233 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
234 NULL, &data->shallow);
235 data->got_remote_heads = 1;
236 }
237
238 refs = fetch_pack(&args, data->fd, data->conn,
239 refs_tmp ? refs_tmp : transport->remote_refs,
240 dest, to_fetch, nr_heads, &data->shallow,
241 &transport->pack_lockfile);
242 close(data->fd[0]);
243 close(data->fd[1]);
244 if (finish_connect(data->conn)) {
245 free_refs(refs);
246 refs = NULL;
247 }
248 data->conn = NULL;
249 data->got_remote_heads = 0;
250 data->options.self_contained_and_connected =
251 args.self_contained_and_connected;
252
253 free_refs(refs_tmp);
254 free_refs(refs);
255 free(dest);
256 return (refs ? 0 : -1);
257 }
258
259 static int push_had_errors(struct ref *ref)
260 {
261 for (; ref; ref = ref->next) {
262 switch (ref->status) {
263 case REF_STATUS_NONE:
264 case REF_STATUS_UPTODATE:
265 case REF_STATUS_OK:
266 break;
267 default:
268 return 1;
269 }
270 }
271 return 0;
272 }
273
274 int transport_refs_pushed(struct ref *ref)
275 {
276 for (; ref; ref = ref->next) {
277 switch(ref->status) {
278 case REF_STATUS_NONE:
279 case REF_STATUS_UPTODATE:
280 break;
281 default:
282 return 1;
283 }
284 }
285 return 0;
286 }
287
288 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
289 {
290 struct refspec rs;
291
292 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
293 return;
294
295 rs.src = ref->name;
296 rs.dst = NULL;
297
298 if (!remote_find_tracking(remote, &rs)) {
299 if (verbose)
300 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
301 if (ref->deletion) {
302 delete_ref(rs.dst, NULL, 0);
303 } else
304 update_ref("update by push", rs.dst,
305 ref->new_oid.hash, NULL, 0, 0);
306 free(rs.dst);
307 }
308 }
309
310 static void print_ref_status(char flag, const char *summary,
311 struct ref *to, struct ref *from, const char *msg,
312 int porcelain, int summary_width)
313 {
314 if (porcelain) {
315 if (from)
316 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
317 else
318 fprintf(stdout, "%c\t:%s\t", flag, to->name);
319 if (msg)
320 fprintf(stdout, "%s (%s)\n", summary, msg);
321 else
322 fprintf(stdout, "%s\n", summary);
323 } else {
324 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
325 if (from)
326 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
327 else
328 fputs(prettify_refname(to->name), stderr);
329 if (msg) {
330 fputs(" (", stderr);
331 fputs(msg, stderr);
332 fputc(')', stderr);
333 }
334 fputc('\n', stderr);
335 }
336 }
337
338 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
339 {
340 if (ref->deletion)
341 print_ref_status('-', "[deleted]", ref, NULL, NULL,
342 porcelain, summary_width);
343 else if (is_null_oid(&ref->old_oid))
344 print_ref_status('*',
345 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
346 "[new branch]"),
347 ref, ref->peer_ref, NULL, porcelain, summary_width);
348 else {
349 struct strbuf quickref = STRBUF_INIT;
350 char type;
351 const char *msg;
352
353 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
354 DEFAULT_ABBREV);
355 if (ref->forced_update) {
356 strbuf_addstr(&quickref, "...");
357 type = '+';
358 msg = "forced update";
359 } else {
360 strbuf_addstr(&quickref, "..");
361 type = ' ';
362 msg = NULL;
363 }
364 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
365 DEFAULT_ABBREV);
366
367 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
368 porcelain, summary_width);
369 strbuf_release(&quickref);
370 }
371 }
372
373 static int print_one_push_status(struct ref *ref, const char *dest, int count,
374 int porcelain, int summary_width)
375 {
376 if (!count) {
377 char *url = transport_anonymize_url(dest);
378 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
379 free(url);
380 }
381
382 switch(ref->status) {
383 case REF_STATUS_NONE:
384 print_ref_status('X', "[no match]", ref, NULL, NULL,
385 porcelain, summary_width);
386 break;
387 case REF_STATUS_REJECT_NODELETE:
388 print_ref_status('!', "[rejected]", ref, NULL,
389 "remote does not support deleting refs",
390 porcelain, summary_width);
391 break;
392 case REF_STATUS_UPTODATE:
393 print_ref_status('=', "[up to date]", ref,
394 ref->peer_ref, NULL, porcelain, summary_width);
395 break;
396 case REF_STATUS_REJECT_NONFASTFORWARD:
397 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
398 "non-fast-forward", porcelain, summary_width);
399 break;
400 case REF_STATUS_REJECT_ALREADY_EXISTS:
401 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
402 "already exists", porcelain, summary_width);
403 break;
404 case REF_STATUS_REJECT_FETCH_FIRST:
405 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
406 "fetch first", porcelain, summary_width);
407 break;
408 case REF_STATUS_REJECT_NEEDS_FORCE:
409 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
410 "needs force", porcelain, summary_width);
411 break;
412 case REF_STATUS_REJECT_STALE:
413 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
414 "stale info", porcelain, summary_width);
415 break;
416 case REF_STATUS_REJECT_SHALLOW:
417 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
418 "new shallow roots not allowed",
419 porcelain, summary_width);
420 break;
421 case REF_STATUS_REMOTE_REJECT:
422 print_ref_status('!', "[remote rejected]", ref,
423 ref->deletion ? NULL : ref->peer_ref,
424 ref->remote_status, porcelain, summary_width);
425 break;
426 case REF_STATUS_EXPECTING_REPORT:
427 print_ref_status('!', "[remote failure]", ref,
428 ref->deletion ? NULL : ref->peer_ref,
429 "remote failed to report status",
430 porcelain, summary_width);
431 break;
432 case REF_STATUS_ATOMIC_PUSH_FAILED:
433 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
434 "atomic push failed", porcelain, summary_width);
435 break;
436 case REF_STATUS_OK:
437 print_ok_ref_status(ref, porcelain, summary_width);
438 break;
439 }
440
441 return 1;
442 }
443
444 static int measure_abbrev(const struct object_id *oid, int sofar)
445 {
446 char hex[GIT_SHA1_HEXSZ + 1];
447 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
448
449 return (w < sofar) ? sofar : w;
450 }
451
452 int transport_summary_width(const struct ref *refs)
453 {
454 int maxw = -1;
455
456 for (; refs; refs = refs->next) {
457 maxw = measure_abbrev(&refs->old_oid, maxw);
458 maxw = measure_abbrev(&refs->new_oid, maxw);
459 }
460 if (maxw < 0)
461 maxw = FALLBACK_DEFAULT_ABBREV;
462 return (2 * maxw + 3);
463 }
464
465 void transport_print_push_status(const char *dest, struct ref *refs,
466 int verbose, int porcelain, unsigned int *reject_reasons)
467 {
468 struct ref *ref;
469 int n = 0;
470 unsigned char head_sha1[20];
471 char *head;
472 int summary_width = transport_summary_width(refs);
473
474 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
475
476 if (verbose) {
477 for (ref = refs; ref; ref = ref->next)
478 if (ref->status == REF_STATUS_UPTODATE)
479 n += print_one_push_status(ref, dest, n,
480 porcelain, summary_width);
481 }
482
483 for (ref = refs; ref; ref = ref->next)
484 if (ref->status == REF_STATUS_OK)
485 n += print_one_push_status(ref, dest, n,
486 porcelain, summary_width);
487
488 *reject_reasons = 0;
489 for (ref = refs; ref; ref = ref->next) {
490 if (ref->status != REF_STATUS_NONE &&
491 ref->status != REF_STATUS_UPTODATE &&
492 ref->status != REF_STATUS_OK)
493 n += print_one_push_status(ref, dest, n,
494 porcelain, summary_width);
495 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
496 if (head != NULL && !strcmp(head, ref->name))
497 *reject_reasons |= REJECT_NON_FF_HEAD;
498 else
499 *reject_reasons |= REJECT_NON_FF_OTHER;
500 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
501 *reject_reasons |= REJECT_ALREADY_EXISTS;
502 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
503 *reject_reasons |= REJECT_FETCH_FIRST;
504 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
505 *reject_reasons |= REJECT_NEEDS_FORCE;
506 }
507 }
508 free(head);
509 }
510
511 void transport_verify_remote_names(int nr_heads, const char **heads)
512 {
513 int i;
514
515 for (i = 0; i < nr_heads; i++) {
516 const char *local = heads[i];
517 const char *remote = strrchr(heads[i], ':');
518
519 if (*local == '+')
520 local++;
521
522 /* A matching refspec is okay. */
523 if (remote == local && remote[1] == '\0')
524 continue;
525
526 remote = remote ? (remote + 1) : local;
527 if (check_refname_format(remote,
528 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
529 die("remote part of refspec is not a valid name in %s",
530 heads[i]);
531 }
532 }
533
534 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
535 {
536 struct git_transport_data *data = transport->data;
537 struct send_pack_args args;
538 int ret;
539
540 if (!data->got_remote_heads) {
541 struct ref *tmp_refs;
542 connect_setup(transport, 1);
543
544 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
545 NULL, &data->shallow);
546 data->got_remote_heads = 1;
547 }
548
549 memset(&args, 0, sizeof(args));
550 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
551 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
552 args.use_thin_pack = data->options.thin;
553 args.verbose = (transport->verbose > 0);
554 args.quiet = (transport->verbose < 0);
555 args.progress = transport->progress;
556 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
557 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
558 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
559 args.push_options = transport->push_options;
560 args.url = transport->url;
561
562 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
563 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
564 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
565 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
566 else
567 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
568
569 ret = send_pack(&args, data->fd, data->conn, remote_refs,
570 &data->extra_have);
571
572 close(data->fd[1]);
573 close(data->fd[0]);
574 ret |= finish_connect(data->conn);
575 data->conn = NULL;
576 data->got_remote_heads = 0;
577
578 return ret;
579 }
580
581 static int connect_git(struct transport *transport, const char *name,
582 const char *executable, int fd[2])
583 {
584 struct git_transport_data *data = transport->data;
585 data->conn = git_connect(data->fd, transport->url,
586 executable, 0);
587 fd[0] = data->fd[0];
588 fd[1] = data->fd[1];
589 return 0;
590 }
591
592 static int disconnect_git(struct transport *transport)
593 {
594 struct git_transport_data *data = transport->data;
595 if (data->conn) {
596 if (data->got_remote_heads)
597 packet_flush(data->fd[1]);
598 close(data->fd[0]);
599 close(data->fd[1]);
600 finish_connect(data->conn);
601 }
602
603 free(data);
604 return 0;
605 }
606
607 void transport_take_over(struct transport *transport,
608 struct child_process *child)
609 {
610 struct git_transport_data *data;
611
612 if (!transport->smart_options)
613 die("BUG: taking over transport requires non-NULL "
614 "smart_options field.");
615
616 data = xcalloc(1, sizeof(*data));
617 data->options = *transport->smart_options;
618 data->conn = child;
619 data->fd[0] = data->conn->out;
620 data->fd[1] = data->conn->in;
621 data->got_remote_heads = 0;
622 transport->data = data;
623
624 transport->set_option = NULL;
625 transport->get_refs_list = get_refs_via_connect;
626 transport->fetch = fetch_refs_via_pack;
627 transport->push = NULL;
628 transport->push_refs = git_transport_push;
629 transport->disconnect = disconnect_git;
630 transport->smart_options = &(data->options);
631
632 transport->cannot_reuse = 1;
633 }
634
635 static int is_file(const char *url)
636 {
637 struct stat buf;
638 if (stat(url, &buf))
639 return 0;
640 return S_ISREG(buf.st_mode);
641 }
642
643 static int external_specification_len(const char *url)
644 {
645 return strchr(url, ':') - url;
646 }
647
648 static const struct string_list *protocol_whitelist(void)
649 {
650 static int enabled = -1;
651 static struct string_list allowed = STRING_LIST_INIT_DUP;
652
653 if (enabled < 0) {
654 const char *v = getenv("GIT_ALLOW_PROTOCOL");
655 if (v) {
656 string_list_split(&allowed, v, ':', -1);
657 string_list_sort(&allowed);
658 enabled = 1;
659 } else {
660 enabled = 0;
661 }
662 }
663
664 return enabled ? &allowed : NULL;
665 }
666
667 int is_transport_allowed(const char *type)
668 {
669 const struct string_list *allowed = protocol_whitelist();
670 return !allowed || string_list_has_string(allowed, type);
671 }
672
673 void transport_check_allowed(const char *type)
674 {
675 if (!is_transport_allowed(type))
676 die("transport '%s' not allowed", type);
677 }
678
679 int transport_restrict_protocols(void)
680 {
681 return !!protocol_whitelist();
682 }
683
684 struct transport *transport_get(struct remote *remote, const char *url)
685 {
686 const char *helper;
687 struct transport *ret = xcalloc(1, sizeof(*ret));
688
689 ret->progress = isatty(2);
690
691 if (!remote)
692 die("No remote provided to transport_get()");
693
694 ret->got_remote_refs = 0;
695 ret->remote = remote;
696 helper = remote->foreign_vcs;
697
698 if (!url && remote->url)
699 url = remote->url[0];
700 ret->url = url;
701
702 /* maybe it is a foreign URL? */
703 if (url) {
704 const char *p = url;
705
706 while (is_urlschemechar(p == url, *p))
707 p++;
708 if (starts_with(p, "::"))
709 helper = xstrndup(url, p - url);
710 }
711
712 if (helper) {
713 transport_helper_init(ret, helper);
714 } else if (starts_with(url, "rsync:")) {
715 die("git-over-rsync is no longer supported");
716 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
717 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
718 transport_check_allowed("file");
719 ret->data = data;
720 ret->get_refs_list = get_refs_from_bundle;
721 ret->fetch = fetch_refs_from_bundle;
722 ret->disconnect = close_bundle;
723 ret->smart_options = NULL;
724 } else if (!is_url(url)
725 || starts_with(url, "file://")
726 || starts_with(url, "git://")
727 || starts_with(url, "ssh://")
728 || starts_with(url, "git+ssh://") /* deprecated - do not use */
729 || starts_with(url, "ssh+git://") /* deprecated - do not use */
730 ) {
731 /*
732 * These are builtin smart transports; "allowed" transports
733 * will be checked individually in git_connect.
734 */
735 struct git_transport_data *data = xcalloc(1, sizeof(*data));
736 ret->data = data;
737 ret->set_option = NULL;
738 ret->get_refs_list = get_refs_via_connect;
739 ret->fetch = fetch_refs_via_pack;
740 ret->push_refs = git_transport_push;
741 ret->connect = connect_git;
742 ret->disconnect = disconnect_git;
743 ret->smart_options = &(data->options);
744
745 data->conn = NULL;
746 data->got_remote_heads = 0;
747 } else {
748 /* Unknown protocol in URL. Pass to external handler. */
749 int len = external_specification_len(url);
750 char *handler = xmemdupz(url, len);
751 transport_helper_init(ret, handler);
752 }
753
754 if (ret->smart_options) {
755 ret->smart_options->thin = 1;
756 ret->smart_options->uploadpack = "git-upload-pack";
757 if (remote->uploadpack)
758 ret->smart_options->uploadpack = remote->uploadpack;
759 ret->smart_options->receivepack = "git-receive-pack";
760 if (remote->receivepack)
761 ret->smart_options->receivepack = remote->receivepack;
762 }
763
764 return ret;
765 }
766
767 int transport_set_option(struct transport *transport,
768 const char *name, const char *value)
769 {
770 int git_reports = 1, protocol_reports = 1;
771
772 if (transport->smart_options)
773 git_reports = set_git_option(transport->smart_options,
774 name, value);
775
776 if (transport->set_option)
777 protocol_reports = transport->set_option(transport, name,
778 value);
779
780 /* If either report is 0, report 0 (success). */
781 if (!git_reports || !protocol_reports)
782 return 0;
783 /* If either reports -1 (invalid value), report -1. */
784 if ((git_reports == -1) || (protocol_reports == -1))
785 return -1;
786 /* Otherwise if both report unknown, report unknown. */
787 return 1;
788 }
789
790 void transport_set_verbosity(struct transport *transport, int verbosity,
791 int force_progress)
792 {
793 if (verbosity >= 1)
794 transport->verbose = verbosity <= 3 ? verbosity : 3;
795 if (verbosity < 0)
796 transport->verbose = -1;
797
798 /**
799 * Rules used to determine whether to report progress (processing aborts
800 * when a rule is satisfied):
801 *
802 * . Report progress, if force_progress is 1 (ie. --progress).
803 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
804 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
805 * . Report progress if isatty(2) is 1.
806 **/
807 if (force_progress >= 0)
808 transport->progress = !!force_progress;
809 else
810 transport->progress = verbosity >= 0 && isatty(2);
811 }
812
813 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
814 {
815 int i;
816
817 fprintf(stderr, _("The following submodule paths contain changes that can\n"
818 "not be found on any remote:\n"));
819 for (i = 0; i < needs_pushing->nr; i++)
820 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
821 fprintf(stderr, _("\nPlease try\n\n"
822 " git push --recurse-submodules=on-demand\n\n"
823 "or cd to the path and use\n\n"
824 " git push\n\n"
825 "to push them to a remote.\n\n"));
826
827 string_list_clear(needs_pushing, 0);
828
829 die(_("Aborting."));
830 }
831
832 static int run_pre_push_hook(struct transport *transport,
833 struct ref *remote_refs)
834 {
835 int ret = 0, x;
836 struct ref *r;
837 struct child_process proc = CHILD_PROCESS_INIT;
838 struct strbuf buf;
839 const char *argv[4];
840
841 if (!(argv[0] = find_hook("pre-push")))
842 return 0;
843
844 argv[1] = transport->remote->name;
845 argv[2] = transport->url;
846 argv[3] = NULL;
847
848 proc.argv = argv;
849 proc.in = -1;
850
851 if (start_command(&proc)) {
852 finish_command(&proc);
853 return -1;
854 }
855
856 sigchain_push(SIGPIPE, SIG_IGN);
857
858 strbuf_init(&buf, 256);
859
860 for (r = remote_refs; r; r = r->next) {
861 if (!r->peer_ref) continue;
862 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
863 if (r->status == REF_STATUS_REJECT_STALE) continue;
864 if (r->status == REF_STATUS_UPTODATE) continue;
865
866 strbuf_reset(&buf);
867 strbuf_addf( &buf, "%s %s %s %s\n",
868 r->peer_ref->name, oid_to_hex(&r->new_oid),
869 r->name, oid_to_hex(&r->old_oid));
870
871 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
872 /* We do not mind if a hook does not read all refs. */
873 if (errno != EPIPE)
874 ret = -1;
875 break;
876 }
877 }
878
879 strbuf_release(&buf);
880
881 x = close(proc.in);
882 if (!ret)
883 ret = x;
884
885 sigchain_pop(SIGPIPE);
886
887 x = finish_command(&proc);
888 if (!ret)
889 ret = x;
890
891 return ret;
892 }
893
894 int transport_push(struct transport *transport,
895 int refspec_nr, const char **refspec, int flags,
896 unsigned int *reject_reasons)
897 {
898 *reject_reasons = 0;
899 transport_verify_remote_names(refspec_nr, refspec);
900
901 if (transport->push) {
902 /* Maybe FIXME. But no important transport uses this case. */
903 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
904 die("This transport does not support using --set-upstream");
905
906 return transport->push(transport, refspec_nr, refspec, flags);
907 } else if (transport->push_refs) {
908 struct ref *remote_refs;
909 struct ref *local_refs = get_local_heads();
910 int match_flags = MATCH_REFS_NONE;
911 int verbose = (transport->verbose > 0);
912 int quiet = (transport->verbose < 0);
913 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
914 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
915 int push_ret, ret, err;
916
917 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
918 return -1;
919
920 remote_refs = transport->get_refs_list(transport, 1);
921
922 if (flags & TRANSPORT_PUSH_ALL)
923 match_flags |= MATCH_REFS_ALL;
924 if (flags & TRANSPORT_PUSH_MIRROR)
925 match_flags |= MATCH_REFS_MIRROR;
926 if (flags & TRANSPORT_PUSH_PRUNE)
927 match_flags |= MATCH_REFS_PRUNE;
928 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
929 match_flags |= MATCH_REFS_FOLLOW_TAGS;
930
931 if (match_push_refs(local_refs, &remote_refs,
932 refspec_nr, refspec, match_flags)) {
933 return -1;
934 }
935
936 if (transport->smart_options &&
937 transport->smart_options->cas &&
938 !is_empty_cas(transport->smart_options->cas))
939 apply_push_cas(transport->smart_options->cas,
940 transport->remote, remote_refs);
941
942 set_ref_status_for_push(remote_refs,
943 flags & TRANSPORT_PUSH_MIRROR,
944 flags & TRANSPORT_PUSH_FORCE);
945
946 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
947 if (run_pre_push_hook(transport, remote_refs))
948 return -1;
949
950 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
951 struct ref *ref = remote_refs;
952 for (; ref; ref = ref->next)
953 if (!is_null_oid(&ref->new_oid) &&
954 !push_unpushed_submodules(ref->new_oid.hash,
955 transport->remote->name))
956 die ("Failed to push all needed submodules!");
957 }
958
959 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
960 TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
961 struct ref *ref = remote_refs;
962 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
963
964 for (; ref; ref = ref->next)
965 if (!is_null_oid(&ref->new_oid) &&
966 find_unpushed_submodules(ref->new_oid.hash,
967 transport->remote->name, &needs_pushing))
968 die_with_unpushed_submodules(&needs_pushing);
969 }
970
971 push_ret = transport->push_refs(transport, remote_refs, flags);
972 err = push_had_errors(remote_refs);
973 ret = push_ret | err;
974
975 if (!quiet || err)
976 transport_print_push_status(transport->url, remote_refs,
977 verbose | porcelain, porcelain,
978 reject_reasons);
979
980 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
981 set_upstreams(transport, remote_refs, pretend);
982
983 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
984 struct ref *ref;
985 for (ref = remote_refs; ref; ref = ref->next)
986 transport_update_tracking_ref(transport->remote, ref, verbose);
987 }
988
989 if (porcelain && !push_ret)
990 puts("Done");
991 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
992 fprintf(stderr, "Everything up-to-date\n");
993
994 return ret;
995 }
996 return 1;
997 }
998
999 const struct ref *transport_get_remote_refs(struct transport *transport)
1000 {
1001 if (!transport->got_remote_refs) {
1002 transport->remote_refs = transport->get_refs_list(transport, 0);
1003 transport->got_remote_refs = 1;
1004 }
1005
1006 return transport->remote_refs;
1007 }
1008
1009 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1010 {
1011 int rc;
1012 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1013 struct ref **heads = NULL;
1014 struct ref *rm;
1015
1016 for (rm = refs; rm; rm = rm->next) {
1017 nr_refs++;
1018 if (rm->peer_ref &&
1019 !is_null_oid(&rm->old_oid) &&
1020 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1021 continue;
1022 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1023 heads[nr_heads++] = rm;
1024 }
1025
1026 if (!nr_heads) {
1027 /*
1028 * When deepening of a shallow repository is requested,
1029 * then local and remote refs are likely to still be equal.
1030 * Just feed them all to the fetch method in that case.
1031 * This condition shouldn't be met in a non-deepening fetch
1032 * (see builtin/fetch.c:quickfetch()).
1033 */
1034 ALLOC_ARRAY(heads, nr_refs);
1035 for (rm = refs; rm; rm = rm->next)
1036 heads[nr_heads++] = rm;
1037 }
1038
1039 rc = transport->fetch(transport, nr_heads, heads);
1040
1041 free(heads);
1042 return rc;
1043 }
1044
1045 void transport_unlock_pack(struct transport *transport)
1046 {
1047 if (transport->pack_lockfile) {
1048 unlink_or_warn(transport->pack_lockfile);
1049 free(transport->pack_lockfile);
1050 transport->pack_lockfile = NULL;
1051 }
1052 }
1053
1054 int transport_connect(struct transport *transport, const char *name,
1055 const char *exec, int fd[2])
1056 {
1057 if (transport->connect)
1058 return transport->connect(transport, name, exec, fd);
1059 else
1060 die("Operation not supported by protocol");
1061 }
1062
1063 int transport_disconnect(struct transport *transport)
1064 {
1065 int ret = 0;
1066 if (transport->disconnect)
1067 ret = transport->disconnect(transport);
1068 free(transport);
1069 return ret;
1070 }
1071
1072 /*
1073 * Strip username (and password) from a URL and return
1074 * it in a newly allocated string.
1075 */
1076 char *transport_anonymize_url(const char *url)
1077 {
1078 char *scheme_prefix, *anon_part;
1079 size_t anon_len, prefix_len = 0;
1080
1081 anon_part = strchr(url, '@');
1082 if (url_is_local_not_ssh(url) || !anon_part)
1083 goto literal_copy;
1084
1085 anon_len = strlen(++anon_part);
1086 scheme_prefix = strstr(url, "://");
1087 if (!scheme_prefix) {
1088 if (!strchr(anon_part, ':'))
1089 /* cannot be "me@there:/path/name" */
1090 goto literal_copy;
1091 } else {
1092 const char *cp;
1093 /* make sure scheme is reasonable */
1094 for (cp = url; cp < scheme_prefix; cp++) {
1095 switch (*cp) {
1096 /* RFC 1738 2.1 */
1097 case '+': case '.': case '-':
1098 break; /* ok */
1099 default:
1100 if (isalnum(*cp))
1101 break;
1102 /* it isn't */
1103 goto literal_copy;
1104 }
1105 }
1106 /* @ past the first slash does not count */
1107 cp = strchr(scheme_prefix + 3, '/');
1108 if (cp && cp < anon_part)
1109 goto literal_copy;
1110 prefix_len = scheme_prefix - url + 3;
1111 }
1112 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1113 (int)anon_len, anon_part);
1114 literal_copy:
1115 return xstrdup(url);
1116 }
1117
1118 struct alternate_refs_data {
1119 alternate_ref_fn *fn;
1120 void *data;
1121 };
1122
1123 static int refs_from_alternate_cb(struct alternate_object_database *e,
1124 void *data)
1125 {
1126 char *other;
1127 size_t len;
1128 struct remote *remote;
1129 struct transport *transport;
1130 const struct ref *extra;
1131 struct alternate_refs_data *cb = data;
1132
1133 other = real_pathdup(e->path);
1134 len = strlen(other);
1135
1136 while (other[len-1] == '/')
1137 other[--len] = '\0';
1138 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1139 goto out;
1140 /* Is this a git repository with refs? */
1141 memcpy(other + len - 8, "/refs", 6);
1142 if (!is_directory(other))
1143 goto out;
1144 other[len - 8] = '\0';
1145 remote = remote_get(other);
1146 transport = transport_get(remote, other);
1147 for (extra = transport_get_remote_refs(transport);
1148 extra;
1149 extra = extra->next)
1150 cb->fn(extra, cb->data);
1151 transport_disconnect(transport);
1152 out:
1153 free(other);
1154 return 0;
1155 }
1156
1157 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1158 {
1159 struct alternate_refs_data cb;
1160 cb.fn = fn;
1161 cb.data = data;
1162 foreach_alt_odb(refs_from_alternate_cb, &cb);
1163 }
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