serve: introduce the server-option capability
[git/git.git] / transport.c
1 #include "cache.h"
2 #include "config.h"
3 #include "transport.h"
4 #include "run-command.h"
5 #include "pkt-line.h"
6 #include "fetch-pack.h"
7 #include "remote.h"
8 #include "connect.h"
9 #include "send-pack.h"
10 #include "walker.h"
11 #include "bundle.h"
12 #include "dir.h"
13 #include "refs.h"
14 #include "branch.h"
15 #include "url.h"
16 #include "submodule.h"
17 #include "string-list.h"
18 #include "sha1-array.h"
19 #include "sigchain.h"
20 #include "transport-internal.h"
21 #include "protocol.h"
22 #include "object-store.h"
23
24 static void set_upstreams(struct transport *transport, struct ref *refs,
25 int pretend)
26 {
27 struct ref *ref;
28 for (ref = refs; ref; ref = ref->next) {
29 const char *localname;
30 const char *tmp;
31 const char *remotename;
32 int flag = 0;
33 /*
34 * Check suitability for tracking. Must be successful /
35 * already up-to-date ref create/modify (not delete).
36 */
37 if (ref->status != REF_STATUS_OK &&
38 ref->status != REF_STATUS_UPTODATE)
39 continue;
40 if (!ref->peer_ref)
41 continue;
42 if (is_null_oid(&ref->new_oid))
43 continue;
44
45 /* Follow symbolic refs (mainly for HEAD). */
46 localname = ref->peer_ref->name;
47 remotename = ref->name;
48 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
49 NULL, &flag);
50 if (tmp && flag & REF_ISSYMREF &&
51 starts_with(tmp, "refs/heads/"))
52 localname = tmp;
53
54 /* Both source and destination must be local branches. */
55 if (!localname || !starts_with(localname, "refs/heads/"))
56 continue;
57 if (!remotename || !starts_with(remotename, "refs/heads/"))
58 continue;
59
60 if (!pretend)
61 install_branch_config(BRANCH_CONFIG_VERBOSE,
62 localname + 11, transport->remote->name,
63 remotename);
64 else
65 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
66 localname + 11, remotename + 11,
67 transport->remote->name);
68 }
69 }
70
71 struct bundle_transport_data {
72 int fd;
73 struct bundle_header header;
74 };
75
76 static struct ref *get_refs_from_bundle(struct transport *transport,
77 int for_push,
78 const struct argv_array *ref_prefixes)
79 {
80 struct bundle_transport_data *data = transport->data;
81 struct ref *result = NULL;
82 int i;
83
84 if (for_push)
85 return NULL;
86
87 if (data->fd > 0)
88 close(data->fd);
89 data->fd = read_bundle_header(transport->url, &data->header);
90 if (data->fd < 0)
91 die ("Could not read bundle '%s'.", transport->url);
92 for (i = 0; i < data->header.references.nr; i++) {
93 struct ref_list_entry *e = data->header.references.list + i;
94 struct ref *ref = alloc_ref(e->name);
95 oidcpy(&ref->old_oid, &e->oid);
96 ref->next = result;
97 result = ref;
98 }
99 return result;
100 }
101
102 static int fetch_refs_from_bundle(struct transport *transport,
103 int nr_heads, struct ref **to_fetch)
104 {
105 struct bundle_transport_data *data = transport->data;
106 return unbundle(&data->header, data->fd,
107 transport->progress ? BUNDLE_VERBOSE : 0);
108 }
109
110 static int close_bundle(struct transport *transport)
111 {
112 struct bundle_transport_data *data = transport->data;
113 if (data->fd > 0)
114 close(data->fd);
115 free(data);
116 return 0;
117 }
118
119 struct git_transport_data {
120 struct git_transport_options options;
121 struct child_process *conn;
122 int fd[2];
123 unsigned got_remote_heads : 1;
124 enum protocol_version version;
125 struct oid_array extra_have;
126 struct oid_array shallow;
127 };
128
129 static int set_git_option(struct git_transport_options *opts,
130 const char *name, const char *value)
131 {
132 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
133 opts->uploadpack = value;
134 return 0;
135 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
136 opts->receivepack = value;
137 return 0;
138 } else if (!strcmp(name, TRANS_OPT_THIN)) {
139 opts->thin = !!value;
140 return 0;
141 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
142 opts->followtags = !!value;
143 return 0;
144 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
145 opts->keep = !!value;
146 return 0;
147 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
148 opts->update_shallow = !!value;
149 return 0;
150 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
151 if (!value)
152 opts->depth = 0;
153 else {
154 char *end;
155 opts->depth = strtol(value, &end, 0);
156 if (*end)
157 die(_("transport: invalid depth option '%s'"), value);
158 }
159 return 0;
160 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
161 opts->deepen_since = value;
162 return 0;
163 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
164 opts->deepen_not = (const struct string_list *)value;
165 return 0;
166 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
167 opts->deepen_relative = !!value;
168 return 0;
169 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
170 opts->from_promisor = !!value;
171 return 0;
172 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
173 opts->no_dependents = !!value;
174 return 0;
175 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
176 parse_list_objects_filter(&opts->filter_options, value);
177 return 0;
178 }
179 return 1;
180 }
181
182 static int connect_setup(struct transport *transport, int for_push)
183 {
184 struct git_transport_data *data = transport->data;
185 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
186
187 if (data->conn)
188 return 0;
189
190 switch (transport->family) {
191 case TRANSPORT_FAMILY_ALL: break;
192 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
193 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
194 }
195
196 data->conn = git_connect(data->fd, transport->url,
197 for_push ? data->options.receivepack :
198 data->options.uploadpack,
199 flags);
200
201 return 0;
202 }
203
204 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
205 const struct argv_array *ref_prefixes)
206 {
207 struct git_transport_data *data = transport->data;
208 struct ref *refs = NULL;
209 struct packet_reader reader;
210
211 connect_setup(transport, for_push);
212
213 packet_reader_init(&reader, data->fd[0], NULL, 0,
214 PACKET_READ_CHOMP_NEWLINE |
215 PACKET_READ_GENTLE_ON_EOF);
216
217 data->version = discover_version(&reader);
218 switch (data->version) {
219 case protocol_v2:
220 get_remote_refs(data->fd[1], &reader, &refs, for_push,
221 ref_prefixes);
222 break;
223 case protocol_v1:
224 case protocol_v0:
225 get_remote_heads(&reader, &refs,
226 for_push ? REF_NORMAL : 0,
227 &data->extra_have,
228 &data->shallow);
229 break;
230 case protocol_unknown_version:
231 BUG("unknown protocol version");
232 }
233 data->got_remote_heads = 1;
234
235 return refs;
236 }
237
238 static int fetch_refs_via_pack(struct transport *transport,
239 int nr_heads, struct ref **to_fetch)
240 {
241 int ret = 0;
242 struct git_transport_data *data = transport->data;
243 struct ref *refs = NULL;
244 char *dest = xstrdup(transport->url);
245 struct fetch_pack_args args;
246 struct ref *refs_tmp = NULL;
247
248 memset(&args, 0, sizeof(args));
249 args.uploadpack = data->options.uploadpack;
250 args.keep_pack = data->options.keep;
251 args.lock_pack = 1;
252 args.use_thin_pack = data->options.thin;
253 args.include_tag = data->options.followtags;
254 args.verbose = (transport->verbose > 1);
255 args.quiet = (transport->verbose < 0);
256 args.no_progress = !transport->progress;
257 args.depth = data->options.depth;
258 args.deepen_since = data->options.deepen_since;
259 args.deepen_not = data->options.deepen_not;
260 args.deepen_relative = data->options.deepen_relative;
261 args.check_self_contained_and_connected =
262 data->options.check_self_contained_and_connected;
263 args.cloning = transport->cloning;
264 args.update_shallow = data->options.update_shallow;
265 args.from_promisor = data->options.from_promisor;
266 args.no_dependents = data->options.no_dependents;
267 args.filter_options = data->options.filter_options;
268 args.stateless_rpc = transport->stateless_rpc;
269
270 if (!data->got_remote_heads)
271 refs_tmp = get_refs_via_connect(transport, 0, NULL);
272
273 switch (data->version) {
274 case protocol_v2:
275 refs = fetch_pack(&args, data->fd, data->conn,
276 refs_tmp ? refs_tmp : transport->remote_refs,
277 dest, to_fetch, nr_heads, &data->shallow,
278 &transport->pack_lockfile, data->version);
279 break;
280 case protocol_v1:
281 case protocol_v0:
282 refs = fetch_pack(&args, data->fd, data->conn,
283 refs_tmp ? refs_tmp : transport->remote_refs,
284 dest, to_fetch, nr_heads, &data->shallow,
285 &transport->pack_lockfile, data->version);
286 break;
287 case protocol_unknown_version:
288 BUG("unknown protocol version");
289 }
290
291 close(data->fd[0]);
292 close(data->fd[1]);
293 if (finish_connect(data->conn))
294 ret = -1;
295 data->conn = NULL;
296 data->got_remote_heads = 0;
297 data->options.self_contained_and_connected =
298 args.self_contained_and_connected;
299
300 if (refs == NULL)
301 ret = -1;
302 if (report_unmatched_refs(to_fetch, nr_heads))
303 ret = -1;
304
305 free_refs(refs_tmp);
306 free_refs(refs);
307 free(dest);
308 return ret;
309 }
310
311 static int push_had_errors(struct ref *ref)
312 {
313 for (; ref; ref = ref->next) {
314 switch (ref->status) {
315 case REF_STATUS_NONE:
316 case REF_STATUS_UPTODATE:
317 case REF_STATUS_OK:
318 break;
319 default:
320 return 1;
321 }
322 }
323 return 0;
324 }
325
326 int transport_refs_pushed(struct ref *ref)
327 {
328 for (; ref; ref = ref->next) {
329 switch(ref->status) {
330 case REF_STATUS_NONE:
331 case REF_STATUS_UPTODATE:
332 break;
333 default:
334 return 1;
335 }
336 }
337 return 0;
338 }
339
340 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
341 {
342 struct refspec rs;
343
344 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
345 return;
346
347 rs.src = ref->name;
348 rs.dst = NULL;
349
350 if (!remote_find_tracking(remote, &rs)) {
351 if (verbose)
352 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
353 if (ref->deletion) {
354 delete_ref(NULL, rs.dst, NULL, 0);
355 } else
356 update_ref("update by push", rs.dst, &ref->new_oid,
357 NULL, 0, 0);
358 free(rs.dst);
359 }
360 }
361
362 static void print_ref_status(char flag, const char *summary,
363 struct ref *to, struct ref *from, const char *msg,
364 int porcelain, int summary_width)
365 {
366 if (porcelain) {
367 if (from)
368 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
369 else
370 fprintf(stdout, "%c\t:%s\t", flag, to->name);
371 if (msg)
372 fprintf(stdout, "%s (%s)\n", summary, msg);
373 else
374 fprintf(stdout, "%s\n", summary);
375 } else {
376 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
377 if (from)
378 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
379 else
380 fputs(prettify_refname(to->name), stderr);
381 if (msg) {
382 fputs(" (", stderr);
383 fputs(msg, stderr);
384 fputc(')', stderr);
385 }
386 fputc('\n', stderr);
387 }
388 }
389
390 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
391 {
392 if (ref->deletion)
393 print_ref_status('-', "[deleted]", ref, NULL, NULL,
394 porcelain, summary_width);
395 else if (is_null_oid(&ref->old_oid))
396 print_ref_status('*',
397 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
398 "[new branch]"),
399 ref, ref->peer_ref, NULL, porcelain, summary_width);
400 else {
401 struct strbuf quickref = STRBUF_INIT;
402 char type;
403 const char *msg;
404
405 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
406 DEFAULT_ABBREV);
407 if (ref->forced_update) {
408 strbuf_addstr(&quickref, "...");
409 type = '+';
410 msg = "forced update";
411 } else {
412 strbuf_addstr(&quickref, "..");
413 type = ' ';
414 msg = NULL;
415 }
416 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
417 DEFAULT_ABBREV);
418
419 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
420 porcelain, summary_width);
421 strbuf_release(&quickref);
422 }
423 }
424
425 static int print_one_push_status(struct ref *ref, const char *dest, int count,
426 int porcelain, int summary_width)
427 {
428 if (!count) {
429 char *url = transport_anonymize_url(dest);
430 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
431 free(url);
432 }
433
434 switch(ref->status) {
435 case REF_STATUS_NONE:
436 print_ref_status('X', "[no match]", ref, NULL, NULL,
437 porcelain, summary_width);
438 break;
439 case REF_STATUS_REJECT_NODELETE:
440 print_ref_status('!', "[rejected]", ref, NULL,
441 "remote does not support deleting refs",
442 porcelain, summary_width);
443 break;
444 case REF_STATUS_UPTODATE:
445 print_ref_status('=', "[up to date]", ref,
446 ref->peer_ref, NULL, porcelain, summary_width);
447 break;
448 case REF_STATUS_REJECT_NONFASTFORWARD:
449 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
450 "non-fast-forward", porcelain, summary_width);
451 break;
452 case REF_STATUS_REJECT_ALREADY_EXISTS:
453 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
454 "already exists", porcelain, summary_width);
455 break;
456 case REF_STATUS_REJECT_FETCH_FIRST:
457 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
458 "fetch first", porcelain, summary_width);
459 break;
460 case REF_STATUS_REJECT_NEEDS_FORCE:
461 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
462 "needs force", porcelain, summary_width);
463 break;
464 case REF_STATUS_REJECT_STALE:
465 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
466 "stale info", porcelain, summary_width);
467 break;
468 case REF_STATUS_REJECT_SHALLOW:
469 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
470 "new shallow roots not allowed",
471 porcelain, summary_width);
472 break;
473 case REF_STATUS_REMOTE_REJECT:
474 print_ref_status('!', "[remote rejected]", ref,
475 ref->deletion ? NULL : ref->peer_ref,
476 ref->remote_status, porcelain, summary_width);
477 break;
478 case REF_STATUS_EXPECTING_REPORT:
479 print_ref_status('!', "[remote failure]", ref,
480 ref->deletion ? NULL : ref->peer_ref,
481 "remote failed to report status",
482 porcelain, summary_width);
483 break;
484 case REF_STATUS_ATOMIC_PUSH_FAILED:
485 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
486 "atomic push failed", porcelain, summary_width);
487 break;
488 case REF_STATUS_OK:
489 print_ok_ref_status(ref, porcelain, summary_width);
490 break;
491 }
492
493 return 1;
494 }
495
496 static int measure_abbrev(const struct object_id *oid, int sofar)
497 {
498 char hex[GIT_MAX_HEXSZ + 1];
499 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
500
501 return (w < sofar) ? sofar : w;
502 }
503
504 int transport_summary_width(const struct ref *refs)
505 {
506 int maxw = -1;
507
508 for (; refs; refs = refs->next) {
509 maxw = measure_abbrev(&refs->old_oid, maxw);
510 maxw = measure_abbrev(&refs->new_oid, maxw);
511 }
512 if (maxw < 0)
513 maxw = FALLBACK_DEFAULT_ABBREV;
514 return (2 * maxw + 3);
515 }
516
517 void transport_print_push_status(const char *dest, struct ref *refs,
518 int verbose, int porcelain, unsigned int *reject_reasons)
519 {
520 struct ref *ref;
521 int n = 0;
522 char *head;
523 int summary_width = transport_summary_width(refs);
524
525 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
526
527 if (verbose) {
528 for (ref = refs; ref; ref = ref->next)
529 if (ref->status == REF_STATUS_UPTODATE)
530 n += print_one_push_status(ref, dest, n,
531 porcelain, summary_width);
532 }
533
534 for (ref = refs; ref; ref = ref->next)
535 if (ref->status == REF_STATUS_OK)
536 n += print_one_push_status(ref, dest, n,
537 porcelain, summary_width);
538
539 *reject_reasons = 0;
540 for (ref = refs; ref; ref = ref->next) {
541 if (ref->status != REF_STATUS_NONE &&
542 ref->status != REF_STATUS_UPTODATE &&
543 ref->status != REF_STATUS_OK)
544 n += print_one_push_status(ref, dest, n,
545 porcelain, summary_width);
546 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
547 if (head != NULL && !strcmp(head, ref->name))
548 *reject_reasons |= REJECT_NON_FF_HEAD;
549 else
550 *reject_reasons |= REJECT_NON_FF_OTHER;
551 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
552 *reject_reasons |= REJECT_ALREADY_EXISTS;
553 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
554 *reject_reasons |= REJECT_FETCH_FIRST;
555 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
556 *reject_reasons |= REJECT_NEEDS_FORCE;
557 }
558 }
559 free(head);
560 }
561
562 void transport_verify_remote_names(int nr_heads, const char **heads)
563 {
564 int i;
565
566 for (i = 0; i < nr_heads; i++) {
567 const char *local = heads[i];
568 const char *remote = strrchr(heads[i], ':');
569
570 if (*local == '+')
571 local++;
572
573 /* A matching refspec is okay. */
574 if (remote == local && remote[1] == '\0')
575 continue;
576
577 remote = remote ? (remote + 1) : local;
578 if (check_refname_format(remote,
579 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
580 die("remote part of refspec is not a valid name in %s",
581 heads[i]);
582 }
583 }
584
585 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
586 {
587 struct git_transport_data *data = transport->data;
588 struct send_pack_args args;
589 int ret = 0;
590
591 if (!data->got_remote_heads)
592 get_refs_via_connect(transport, 1, NULL);
593
594 memset(&args, 0, sizeof(args));
595 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
596 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
597 args.use_thin_pack = data->options.thin;
598 args.verbose = (transport->verbose > 0);
599 args.quiet = (transport->verbose < 0);
600 args.progress = transport->progress;
601 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
602 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
603 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
604 args.push_options = transport->push_options;
605 args.url = transport->url;
606
607 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
608 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
609 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
610 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
611 else
612 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
613
614 switch (data->version) {
615 case protocol_v2:
616 die("support for protocol v2 not implemented yet");
617 break;
618 case protocol_v1:
619 case protocol_v0:
620 ret = send_pack(&args, data->fd, data->conn, remote_refs,
621 &data->extra_have);
622 break;
623 case protocol_unknown_version:
624 BUG("unknown protocol version");
625 }
626
627 close(data->fd[1]);
628 close(data->fd[0]);
629 ret |= finish_connect(data->conn);
630 data->conn = NULL;
631 data->got_remote_heads = 0;
632
633 return ret;
634 }
635
636 static int connect_git(struct transport *transport, const char *name,
637 const char *executable, int fd[2])
638 {
639 struct git_transport_data *data = transport->data;
640 data->conn = git_connect(data->fd, transport->url,
641 executable, 0);
642 fd[0] = data->fd[0];
643 fd[1] = data->fd[1];
644 return 0;
645 }
646
647 static int disconnect_git(struct transport *transport)
648 {
649 struct git_transport_data *data = transport->data;
650 if (data->conn) {
651 if (data->got_remote_heads)
652 packet_flush(data->fd[1]);
653 close(data->fd[0]);
654 close(data->fd[1]);
655 finish_connect(data->conn);
656 }
657
658 free(data);
659 return 0;
660 }
661
662 static struct transport_vtable taken_over_vtable = {
663 NULL,
664 get_refs_via_connect,
665 fetch_refs_via_pack,
666 git_transport_push,
667 NULL,
668 disconnect_git
669 };
670
671 void transport_take_over(struct transport *transport,
672 struct child_process *child)
673 {
674 struct git_transport_data *data;
675
676 if (!transport->smart_options)
677 die("BUG: taking over transport requires non-NULL "
678 "smart_options field.");
679
680 data = xcalloc(1, sizeof(*data));
681 data->options = *transport->smart_options;
682 data->conn = child;
683 data->fd[0] = data->conn->out;
684 data->fd[1] = data->conn->in;
685 data->got_remote_heads = 0;
686 transport->data = data;
687
688 transport->vtable = &taken_over_vtable;
689 transport->smart_options = &(data->options);
690
691 transport->cannot_reuse = 1;
692 }
693
694 static int is_file(const char *url)
695 {
696 struct stat buf;
697 if (stat(url, &buf))
698 return 0;
699 return S_ISREG(buf.st_mode);
700 }
701
702 static int external_specification_len(const char *url)
703 {
704 return strchr(url, ':') - url;
705 }
706
707 static const struct string_list *protocol_whitelist(void)
708 {
709 static int enabled = -1;
710 static struct string_list allowed = STRING_LIST_INIT_DUP;
711
712 if (enabled < 0) {
713 const char *v = getenv("GIT_ALLOW_PROTOCOL");
714 if (v) {
715 string_list_split(&allowed, v, ':', -1);
716 string_list_sort(&allowed);
717 enabled = 1;
718 } else {
719 enabled = 0;
720 }
721 }
722
723 return enabled ? &allowed : NULL;
724 }
725
726 enum protocol_allow_config {
727 PROTOCOL_ALLOW_NEVER = 0,
728 PROTOCOL_ALLOW_USER_ONLY,
729 PROTOCOL_ALLOW_ALWAYS
730 };
731
732 static enum protocol_allow_config parse_protocol_config(const char *key,
733 const char *value)
734 {
735 if (!strcasecmp(value, "always"))
736 return PROTOCOL_ALLOW_ALWAYS;
737 else if (!strcasecmp(value, "never"))
738 return PROTOCOL_ALLOW_NEVER;
739 else if (!strcasecmp(value, "user"))
740 return PROTOCOL_ALLOW_USER_ONLY;
741
742 die("unknown value for config '%s': %s", key, value);
743 }
744
745 static enum protocol_allow_config get_protocol_config(const char *type)
746 {
747 char *key = xstrfmt("protocol.%s.allow", type);
748 char *value;
749
750 /* first check the per-protocol config */
751 if (!git_config_get_string(key, &value)) {
752 enum protocol_allow_config ret =
753 parse_protocol_config(key, value);
754 free(key);
755 free(value);
756 return ret;
757 }
758 free(key);
759
760 /* if defined, fallback to user-defined default for unknown protocols */
761 if (!git_config_get_string("protocol.allow", &value)) {
762 enum protocol_allow_config ret =
763 parse_protocol_config("protocol.allow", value);
764 free(value);
765 return ret;
766 }
767
768 /* fallback to built-in defaults */
769 /* known safe */
770 if (!strcmp(type, "http") ||
771 !strcmp(type, "https") ||
772 !strcmp(type, "git") ||
773 !strcmp(type, "ssh") ||
774 !strcmp(type, "file"))
775 return PROTOCOL_ALLOW_ALWAYS;
776
777 /* known scary; err on the side of caution */
778 if (!strcmp(type, "ext"))
779 return PROTOCOL_ALLOW_NEVER;
780
781 /* unknown; by default let them be used only directly by the user */
782 return PROTOCOL_ALLOW_USER_ONLY;
783 }
784
785 int is_transport_allowed(const char *type, int from_user)
786 {
787 const struct string_list *whitelist = protocol_whitelist();
788 if (whitelist)
789 return string_list_has_string(whitelist, type);
790
791 switch (get_protocol_config(type)) {
792 case PROTOCOL_ALLOW_ALWAYS:
793 return 1;
794 case PROTOCOL_ALLOW_NEVER:
795 return 0;
796 case PROTOCOL_ALLOW_USER_ONLY:
797 if (from_user < 0)
798 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
799 return from_user;
800 }
801
802 die("BUG: invalid protocol_allow_config type");
803 }
804
805 void transport_check_allowed(const char *type)
806 {
807 if (!is_transport_allowed(type, -1))
808 die("transport '%s' not allowed", type);
809 }
810
811 static struct transport_vtable bundle_vtable = {
812 NULL,
813 get_refs_from_bundle,
814 fetch_refs_from_bundle,
815 NULL,
816 NULL,
817 close_bundle
818 };
819
820 static struct transport_vtable builtin_smart_vtable = {
821 NULL,
822 get_refs_via_connect,
823 fetch_refs_via_pack,
824 git_transport_push,
825 connect_git,
826 disconnect_git
827 };
828
829 struct transport *transport_get(struct remote *remote, const char *url)
830 {
831 const char *helper;
832 struct transport *ret = xcalloc(1, sizeof(*ret));
833
834 ret->progress = isatty(2);
835
836 if (!remote)
837 die("No remote provided to transport_get()");
838
839 ret->got_remote_refs = 0;
840 ret->remote = remote;
841 helper = remote->foreign_vcs;
842
843 if (!url && remote->url)
844 url = remote->url[0];
845 ret->url = url;
846
847 /* maybe it is a foreign URL? */
848 if (url) {
849 const char *p = url;
850
851 while (is_urlschemechar(p == url, *p))
852 p++;
853 if (starts_with(p, "::"))
854 helper = xstrndup(url, p - url);
855 }
856
857 if (helper) {
858 transport_helper_init(ret, helper);
859 } else if (starts_with(url, "rsync:")) {
860 die("git-over-rsync is no longer supported");
861 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
862 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
863 transport_check_allowed("file");
864 ret->data = data;
865 ret->vtable = &bundle_vtable;
866 ret->smart_options = NULL;
867 } else if (!is_url(url)
868 || starts_with(url, "file://")
869 || starts_with(url, "git://")
870 || starts_with(url, "ssh://")
871 || starts_with(url, "git+ssh://") /* deprecated - do not use */
872 || starts_with(url, "ssh+git://") /* deprecated - do not use */
873 ) {
874 /*
875 * These are builtin smart transports; "allowed" transports
876 * will be checked individually in git_connect.
877 */
878 struct git_transport_data *data = xcalloc(1, sizeof(*data));
879 ret->data = data;
880 ret->vtable = &builtin_smart_vtable;
881 ret->smart_options = &(data->options);
882
883 data->conn = NULL;
884 data->got_remote_heads = 0;
885 } else {
886 /* Unknown protocol in URL. Pass to external handler. */
887 int len = external_specification_len(url);
888 char *handler = xmemdupz(url, len);
889 transport_helper_init(ret, handler);
890 }
891
892 if (ret->smart_options) {
893 ret->smart_options->thin = 1;
894 ret->smart_options->uploadpack = "git-upload-pack";
895 if (remote->uploadpack)
896 ret->smart_options->uploadpack = remote->uploadpack;
897 ret->smart_options->receivepack = "git-receive-pack";
898 if (remote->receivepack)
899 ret->smart_options->receivepack = remote->receivepack;
900 }
901
902 return ret;
903 }
904
905 int transport_set_option(struct transport *transport,
906 const char *name, const char *value)
907 {
908 int git_reports = 1, protocol_reports = 1;
909
910 if (transport->smart_options)
911 git_reports = set_git_option(transport->smart_options,
912 name, value);
913
914 if (transport->vtable->set_option)
915 protocol_reports = transport->vtable->set_option(transport,
916 name, value);
917
918 /* If either report is 0, report 0 (success). */
919 if (!git_reports || !protocol_reports)
920 return 0;
921 /* If either reports -1 (invalid value), report -1. */
922 if ((git_reports == -1) || (protocol_reports == -1))
923 return -1;
924 /* Otherwise if both report unknown, report unknown. */
925 return 1;
926 }
927
928 void transport_set_verbosity(struct transport *transport, int verbosity,
929 int force_progress)
930 {
931 if (verbosity >= 1)
932 transport->verbose = verbosity <= 3 ? verbosity : 3;
933 if (verbosity < 0)
934 transport->verbose = -1;
935
936 /**
937 * Rules used to determine whether to report progress (processing aborts
938 * when a rule is satisfied):
939 *
940 * . Report progress, if force_progress is 1 (ie. --progress).
941 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
942 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
943 * . Report progress if isatty(2) is 1.
944 **/
945 if (force_progress >= 0)
946 transport->progress = !!force_progress;
947 else
948 transport->progress = verbosity >= 0 && isatty(2);
949 }
950
951 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
952 {
953 int i;
954
955 fprintf(stderr, _("The following submodule paths contain changes that can\n"
956 "not be found on any remote:\n"));
957 for (i = 0; i < needs_pushing->nr; i++)
958 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
959 fprintf(stderr, _("\nPlease try\n\n"
960 " git push --recurse-submodules=on-demand\n\n"
961 "or cd to the path and use\n\n"
962 " git push\n\n"
963 "to push them to a remote.\n\n"));
964
965 string_list_clear(needs_pushing, 0);
966
967 die(_("Aborting."));
968 }
969
970 static int run_pre_push_hook(struct transport *transport,
971 struct ref *remote_refs)
972 {
973 int ret = 0, x;
974 struct ref *r;
975 struct child_process proc = CHILD_PROCESS_INIT;
976 struct strbuf buf;
977 const char *argv[4];
978
979 if (!(argv[0] = find_hook("pre-push")))
980 return 0;
981
982 argv[1] = transport->remote->name;
983 argv[2] = transport->url;
984 argv[3] = NULL;
985
986 proc.argv = argv;
987 proc.in = -1;
988
989 if (start_command(&proc)) {
990 finish_command(&proc);
991 return -1;
992 }
993
994 sigchain_push(SIGPIPE, SIG_IGN);
995
996 strbuf_init(&buf, 256);
997
998 for (r = remote_refs; r; r = r->next) {
999 if (!r->peer_ref) continue;
1000 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1001 if (r->status == REF_STATUS_REJECT_STALE) continue;
1002 if (r->status == REF_STATUS_UPTODATE) continue;
1003
1004 strbuf_reset(&buf);
1005 strbuf_addf( &buf, "%s %s %s %s\n",
1006 r->peer_ref->name, oid_to_hex(&r->new_oid),
1007 r->name, oid_to_hex(&r->old_oid));
1008
1009 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1010 /* We do not mind if a hook does not read all refs. */
1011 if (errno != EPIPE)
1012 ret = -1;
1013 break;
1014 }
1015 }
1016
1017 strbuf_release(&buf);
1018
1019 x = close(proc.in);
1020 if (!ret)
1021 ret = x;
1022
1023 sigchain_pop(SIGPIPE);
1024
1025 x = finish_command(&proc);
1026 if (!ret)
1027 ret = x;
1028
1029 return ret;
1030 }
1031
1032 int transport_push(struct transport *transport,
1033 int refspec_nr, const char **refspec, int flags,
1034 unsigned int *reject_reasons)
1035 {
1036 *reject_reasons = 0;
1037 transport_verify_remote_names(refspec_nr, refspec);
1038
1039 if (transport->vtable->push_refs) {
1040 struct ref *remote_refs;
1041 struct ref *local_refs = get_local_heads();
1042 int match_flags = MATCH_REFS_NONE;
1043 int verbose = (transport->verbose > 0);
1044 int quiet = (transport->verbose < 0);
1045 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1046 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1047 int push_ret, ret, err;
1048 struct refspec *tmp_rs;
1049 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1050 int i;
1051
1052 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1053 return -1;
1054
1055 tmp_rs = parse_push_refspec(refspec_nr, refspec);
1056 for (i = 0; i < refspec_nr; i++) {
1057 const char *prefix = NULL;
1058
1059 if (tmp_rs[i].dst)
1060 prefix = tmp_rs[i].dst;
1061 else if (tmp_rs[i].src && !tmp_rs[i].exact_sha1)
1062 prefix = tmp_rs[i].src;
1063
1064 if (prefix) {
1065 const char *glob = strchr(prefix, '*');
1066 if (glob)
1067 argv_array_pushf(&ref_prefixes, "%.*s",
1068 (int)(glob - prefix),
1069 prefix);
1070 else
1071 expand_ref_prefix(&ref_prefixes, prefix);
1072 }
1073 }
1074
1075 remote_refs = transport->vtable->get_refs_list(transport, 1,
1076 &ref_prefixes);
1077
1078 argv_array_clear(&ref_prefixes);
1079 free_refspec(refspec_nr, tmp_rs);
1080
1081 if (flags & TRANSPORT_PUSH_ALL)
1082 match_flags |= MATCH_REFS_ALL;
1083 if (flags & TRANSPORT_PUSH_MIRROR)
1084 match_flags |= MATCH_REFS_MIRROR;
1085 if (flags & TRANSPORT_PUSH_PRUNE)
1086 match_flags |= MATCH_REFS_PRUNE;
1087 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1088 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1089
1090 if (match_push_refs(local_refs, &remote_refs,
1091 refspec_nr, refspec, match_flags)) {
1092 return -1;
1093 }
1094
1095 if (transport->smart_options &&
1096 transport->smart_options->cas &&
1097 !is_empty_cas(transport->smart_options->cas))
1098 apply_push_cas(transport->smart_options->cas,
1099 transport->remote, remote_refs);
1100
1101 set_ref_status_for_push(remote_refs,
1102 flags & TRANSPORT_PUSH_MIRROR,
1103 flags & TRANSPORT_PUSH_FORCE);
1104
1105 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1106 if (run_pre_push_hook(transport, remote_refs))
1107 return -1;
1108
1109 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1110 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1111 !is_bare_repository()) {
1112 struct ref *ref = remote_refs;
1113 struct oid_array commits = OID_ARRAY_INIT;
1114
1115 for (; ref; ref = ref->next)
1116 if (!is_null_oid(&ref->new_oid))
1117 oid_array_append(&commits,
1118 &ref->new_oid);
1119
1120 if (!push_unpushed_submodules(&commits,
1121 transport->remote,
1122 refspec, refspec_nr,
1123 transport->push_options,
1124 pretend)) {
1125 oid_array_clear(&commits);
1126 die("Failed to push all needed submodules!");
1127 }
1128 oid_array_clear(&commits);
1129 }
1130
1131 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1132 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1133 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1134 !pretend)) && !is_bare_repository()) {
1135 struct ref *ref = remote_refs;
1136 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1137 struct oid_array commits = OID_ARRAY_INIT;
1138
1139 for (; ref; ref = ref->next)
1140 if (!is_null_oid(&ref->new_oid))
1141 oid_array_append(&commits,
1142 &ref->new_oid);
1143
1144 if (find_unpushed_submodules(&commits, transport->remote->name,
1145 &needs_pushing)) {
1146 oid_array_clear(&commits);
1147 die_with_unpushed_submodules(&needs_pushing);
1148 }
1149 string_list_clear(&needs_pushing, 0);
1150 oid_array_clear(&commits);
1151 }
1152
1153 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1154 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1155 else
1156 push_ret = 0;
1157 err = push_had_errors(remote_refs);
1158 ret = push_ret | err;
1159
1160 if (!quiet || err)
1161 transport_print_push_status(transport->url, remote_refs,
1162 verbose | porcelain, porcelain,
1163 reject_reasons);
1164
1165 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1166 set_upstreams(transport, remote_refs, pretend);
1167
1168 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1169 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1170 struct ref *ref;
1171 for (ref = remote_refs; ref; ref = ref->next)
1172 transport_update_tracking_ref(transport->remote, ref, verbose);
1173 }
1174
1175 if (porcelain && !push_ret)
1176 puts("Done");
1177 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1178 fprintf(stderr, "Everything up-to-date\n");
1179
1180 return ret;
1181 }
1182 return 1;
1183 }
1184
1185 const struct ref *transport_get_remote_refs(struct transport *transport,
1186 const struct argv_array *ref_prefixes)
1187 {
1188 if (!transport->got_remote_refs) {
1189 transport->remote_refs =
1190 transport->vtable->get_refs_list(transport, 0,
1191 ref_prefixes);
1192 transport->got_remote_refs = 1;
1193 }
1194
1195 return transport->remote_refs;
1196 }
1197
1198 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1199 {
1200 int rc;
1201 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1202 struct ref **heads = NULL;
1203 struct ref *rm;
1204
1205 for (rm = refs; rm; rm = rm->next) {
1206 nr_refs++;
1207 if (rm->peer_ref &&
1208 !is_null_oid(&rm->old_oid) &&
1209 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1210 continue;
1211 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1212 heads[nr_heads++] = rm;
1213 }
1214
1215 if (!nr_heads) {
1216 /*
1217 * When deepening of a shallow repository is requested,
1218 * then local and remote refs are likely to still be equal.
1219 * Just feed them all to the fetch method in that case.
1220 * This condition shouldn't be met in a non-deepening fetch
1221 * (see builtin/fetch.c:quickfetch()).
1222 */
1223 ALLOC_ARRAY(heads, nr_refs);
1224 for (rm = refs; rm; rm = rm->next)
1225 heads[nr_heads++] = rm;
1226 }
1227
1228 rc = transport->vtable->fetch(transport, nr_heads, heads);
1229
1230 free(heads);
1231 return rc;
1232 }
1233
1234 void transport_unlock_pack(struct transport *transport)
1235 {
1236 if (transport->pack_lockfile) {
1237 unlink_or_warn(transport->pack_lockfile);
1238 FREE_AND_NULL(transport->pack_lockfile);
1239 }
1240 }
1241
1242 int transport_connect(struct transport *transport, const char *name,
1243 const char *exec, int fd[2])
1244 {
1245 if (transport->vtable->connect)
1246 return transport->vtable->connect(transport, name, exec, fd);
1247 else
1248 die("Operation not supported by protocol");
1249 }
1250
1251 int transport_disconnect(struct transport *transport)
1252 {
1253 int ret = 0;
1254 if (transport->vtable->disconnect)
1255 ret = transport->vtable->disconnect(transport);
1256 free(transport);
1257 return ret;
1258 }
1259
1260 /*
1261 * Strip username (and password) from a URL and return
1262 * it in a newly allocated string.
1263 */
1264 char *transport_anonymize_url(const char *url)
1265 {
1266 char *scheme_prefix, *anon_part;
1267 size_t anon_len, prefix_len = 0;
1268
1269 anon_part = strchr(url, '@');
1270 if (url_is_local_not_ssh(url) || !anon_part)
1271 goto literal_copy;
1272
1273 anon_len = strlen(++anon_part);
1274 scheme_prefix = strstr(url, "://");
1275 if (!scheme_prefix) {
1276 if (!strchr(anon_part, ':'))
1277 /* cannot be "me@there:/path/name" */
1278 goto literal_copy;
1279 } else {
1280 const char *cp;
1281 /* make sure scheme is reasonable */
1282 for (cp = url; cp < scheme_prefix; cp++) {
1283 switch (*cp) {
1284 /* RFC 1738 2.1 */
1285 case '+': case '.': case '-':
1286 break; /* ok */
1287 default:
1288 if (isalnum(*cp))
1289 break;
1290 /* it isn't */
1291 goto literal_copy;
1292 }
1293 }
1294 /* @ past the first slash does not count */
1295 cp = strchr(scheme_prefix + 3, '/');
1296 if (cp && cp < anon_part)
1297 goto literal_copy;
1298 prefix_len = scheme_prefix - url + 3;
1299 }
1300 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1301 (int)anon_len, anon_part);
1302 literal_copy:
1303 return xstrdup(url);
1304 }
1305
1306 static void read_alternate_refs(const char *path,
1307 alternate_ref_fn *cb,
1308 void *data)
1309 {
1310 struct child_process cmd = CHILD_PROCESS_INIT;
1311 struct strbuf line = STRBUF_INIT;
1312 FILE *fh;
1313
1314 cmd.git_cmd = 1;
1315 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1316 argv_array_push(&cmd.args, "for-each-ref");
1317 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1318 cmd.env = local_repo_env;
1319 cmd.out = -1;
1320
1321 if (start_command(&cmd))
1322 return;
1323
1324 fh = xfdopen(cmd.out, "r");
1325 while (strbuf_getline_lf(&line, fh) != EOF) {
1326 struct object_id oid;
1327
1328 if (get_oid_hex(line.buf, &oid) ||
1329 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1330 warning("invalid line while parsing alternate refs: %s",
1331 line.buf);
1332 break;
1333 }
1334
1335 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1336 }
1337
1338 fclose(fh);
1339 finish_command(&cmd);
1340 }
1341
1342 struct alternate_refs_data {
1343 alternate_ref_fn *fn;
1344 void *data;
1345 };
1346
1347 static int refs_from_alternate_cb(struct alternate_object_database *e,
1348 void *data)
1349 {
1350 struct strbuf path = STRBUF_INIT;
1351 size_t base_len;
1352 struct alternate_refs_data *cb = data;
1353
1354 if (!strbuf_realpath(&path, e->path, 0))
1355 goto out;
1356 if (!strbuf_strip_suffix(&path, "/objects"))
1357 goto out;
1358 base_len = path.len;
1359
1360 /* Is this a git repository with refs? */
1361 strbuf_addstr(&path, "/refs");
1362 if (!is_directory(path.buf))
1363 goto out;
1364 strbuf_setlen(&path, base_len);
1365
1366 read_alternate_refs(path.buf, cb->fn, cb->data);
1367
1368 out:
1369 strbuf_release(&path);
1370 return 0;
1371 }
1372
1373 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1374 {
1375 struct alternate_refs_data cb;
1376 cb.fn = fn;
1377 cb.data = data;
1378 foreach_alt_odb(refs_from_alternate_cb, &cb);
1379 }