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refspec: add and use refspec_appendf()
[git.git] / transport.c
blob43e24bf1e539db89fcbc8b5b778558054ea8674f
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 "refspec.h"
15 #include "branch.h"
16 #include "url.h"
17 #include "submodule.h"
18 #include "string-list.h"
19 #include "oid-array.h"
20 #include "sigchain.h"
21 #include "transport-internal.h"
22 #include "protocol.h"
23 #include "object-store.h"
24 #include "color.h"
25
26 static int transport_use_color = -1;
27 static char transport_colors[][COLOR_MAXLEN] = {
28 GIT_COLOR_RESET,
29 GIT_COLOR_RED /* REJECTED */
30 };
31
32 enum color_transport {
33 TRANSPORT_COLOR_RESET = 0,
34 TRANSPORT_COLOR_REJECTED = 1
35 };
36
37 static int transport_color_config(void)
38 {
39 const char *keys[] = {
40 "color.transport.reset",
41 "color.transport.rejected"
42 }, *key = "color.transport";
43 char *value;
44 int i;
45 static int initialized;
46
47 if (initialized)
48 return 0;
49 initialized = 1;
50
51 if (!git_config_get_string(key, &value))
52 transport_use_color = git_config_colorbool(key, value);
53
54 if (!want_color_stderr(transport_use_color))
55 return 0;
56
57 for (i = 0; i < ARRAY_SIZE(keys); i++)
58 if (!git_config_get_string(keys[i], &value)) {
59 if (!value)
60 return config_error_nonbool(keys[i]);
61 if (color_parse(value, transport_colors[i]) < 0)
62 return -1;
63 }
64
65 return 0;
66 }
67
68 static const char *transport_get_color(enum color_transport ix)
69 {
70 if (want_color_stderr(transport_use_color))
71 return transport_colors[ix];
72 return "";
73 }
74
75 static void set_upstreams(struct transport *transport, struct ref *refs,
76 int pretend)
77 {
78 struct ref *ref;
79 for (ref = refs; ref; ref = ref->next) {
80 const char *localname;
81 const char *tmp;
82 const char *remotename;
83 int flag = 0;
84 /*
85 * Check suitability for tracking. Must be successful /
86 * already up-to-date ref create/modify (not delete).
87 */
88 if (ref->status != REF_STATUS_OK &&
89 ref->status != REF_STATUS_UPTODATE)
90 continue;
91 if (!ref->peer_ref)
92 continue;
93 if (is_null_oid(&ref->new_oid))
94 continue;
95
96 /* Follow symbolic refs (mainly for HEAD). */
97 localname = ref->peer_ref->name;
98 remotename = ref->name;
99 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
100 NULL, &flag);
101 if (tmp && flag & REF_ISSYMREF &&
102 starts_with(tmp, "refs/heads/"))
103 localname = tmp;
104
105 /* Both source and destination must be local branches. */
106 if (!localname || !starts_with(localname, "refs/heads/"))
107 continue;
108 if (!remotename || !starts_with(remotename, "refs/heads/"))
109 continue;
110
111 if (!pretend)
112 install_branch_config(BRANCH_CONFIG_VERBOSE,
113 localname + 11, transport->remote->name,
114 remotename);
115 else
116 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
117 localname + 11, remotename + 11,
118 transport->remote->name);
119 }
120 }
121
122 struct bundle_transport_data {
123 int fd;
124 struct bundle_header header;
125 unsigned get_refs_from_bundle_called : 1;
126 };
127
128 static struct ref *get_refs_from_bundle(struct transport *transport,
129 int for_push,
130 const struct strvec *ref_prefixes)
131 {
132 struct bundle_transport_data *data = transport->data;
133 struct ref *result = NULL;
134 int i;
135
136 if (for_push)
137 return NULL;
138
139 data->get_refs_from_bundle_called = 1;
140
141 if (data->fd > 0)
142 close(data->fd);
143 data->fd = read_bundle_header(transport->url, &data->header);
144 if (data->fd < 0)
145 die(_("could not read bundle '%s'"), transport->url);
146
147 transport->hash_algo = data->header.hash_algo;
148
149 for (i = 0; i < data->header.references.nr; i++) {
150 struct ref_list_entry *e = data->header.references.list + i;
151 struct ref *ref = alloc_ref(e->name);
152 oidcpy(&ref->old_oid, &e->oid);
153 ref->next = result;
154 result = ref;
155 }
156 return result;
157 }
158
159 static int fetch_refs_from_bundle(struct transport *transport,
160 int nr_heads, struct ref **to_fetch)
161 {
162 struct bundle_transport_data *data = transport->data;
163 int ret;
164
165 if (!data->get_refs_from_bundle_called)
166 get_refs_from_bundle(transport, 0, NULL);
167 ret = unbundle(the_repository, &data->header, data->fd,
168 transport->progress ? BUNDLE_VERBOSE : 0);
169 transport->hash_algo = data->header.hash_algo;
170 return ret;
171 }
172
173 static int close_bundle(struct transport *transport)
174 {
175 struct bundle_transport_data *data = transport->data;
176 if (data->fd > 0)
177 close(data->fd);
178 free(data);
179 return 0;
180 }
181
182 struct git_transport_data {
183 struct git_transport_options options;
184 struct child_process *conn;
185 int fd[2];
186 unsigned got_remote_heads : 1;
187 enum protocol_version version;
188 struct oid_array extra_have;
189 struct oid_array shallow;
190 };
191
192 static int set_git_option(struct git_transport_options *opts,
193 const char *name, const char *value)
194 {
195 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
196 opts->uploadpack = value;
197 return 0;
198 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
199 opts->receivepack = value;
200 return 0;
201 } else if (!strcmp(name, TRANS_OPT_THIN)) {
202 opts->thin = !!value;
203 return 0;
204 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
205 opts->followtags = !!value;
206 return 0;
207 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
208 opts->keep = !!value;
209 return 0;
210 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
211 opts->update_shallow = !!value;
212 return 0;
213 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
214 if (!value)
215 opts->depth = 0;
216 else {
217 char *end;
218 opts->depth = strtol(value, &end, 0);
219 if (*end)
220 die(_("transport: invalid depth option '%s'"), value);
221 }
222 return 0;
223 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
224 opts->deepen_since = value;
225 return 0;
226 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
227 opts->deepen_not = (const struct string_list *)value;
228 return 0;
229 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
230 opts->deepen_relative = !!value;
231 return 0;
232 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
233 opts->from_promisor = !!value;
234 return 0;
235 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
236 list_objects_filter_die_if_populated(&opts->filter_options);
237 parse_list_objects_filter(&opts->filter_options, value);
238 return 0;
239 }
240 return 1;
241 }
242
243 static int connect_setup(struct transport *transport, int for_push)
244 {
245 struct git_transport_data *data = transport->data;
246 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
247
248 if (data->conn)
249 return 0;
250
251 switch (transport->family) {
252 case TRANSPORT_FAMILY_ALL: break;
253 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
254 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
255 }
256
257 data->conn = git_connect(data->fd, transport->url,
258 for_push ? data->options.receivepack :
259 data->options.uploadpack,
260 flags);
261
262 return 0;
263 }
264
265 static void die_if_server_options(struct transport *transport)
266 {
267 if (!transport->server_options || !transport->server_options->nr)
268 return;
269 advise(_("see protocol.version in 'git help config' for more details"));
270 die(_("server options require protocol version 2 or later"));
271 }
272
273 /*
274 * Obtains the protocol version from the transport and writes it to
275 * transport->data->version, first connecting if not already connected.
276 *
277 * If the protocol version is one that allows skipping the listing of remote
278 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
279 * this function returns NULL. Otherwise, this function returns the list of
280 * remote refs.
281 */
282 static struct ref *handshake(struct transport *transport, int for_push,
283 const struct strvec *ref_prefixes,
284 int must_list_refs)
285 {
286 struct git_transport_data *data = transport->data;
287 struct ref *refs = NULL;
288 struct packet_reader reader;
289
290 connect_setup(transport, for_push);
291
292 packet_reader_init(&reader, data->fd[0], NULL, 0,
293 PACKET_READ_CHOMP_NEWLINE |
294 PACKET_READ_GENTLE_ON_EOF |
295 PACKET_READ_DIE_ON_ERR_PACKET);
296
297 data->version = discover_version(&reader);
298 switch (data->version) {
299 case protocol_v2:
300 if (must_list_refs)
301 get_remote_refs(data->fd[1], &reader, &refs, for_push,
302 ref_prefixes,
303 transport->server_options,
304 transport->stateless_rpc);
305 break;
306 case protocol_v1:
307 case protocol_v0:
308 die_if_server_options(transport);
309 get_remote_heads(&reader, &refs,
310 for_push ? REF_NORMAL : 0,
311 &data->extra_have,
312 &data->shallow);
313 break;
314 case protocol_unknown_version:
315 BUG("unknown protocol version");
316 }
317 data->got_remote_heads = 1;
318 transport->hash_algo = reader.hash_algo;
319
320 if (reader.line_peeked)
321 BUG("buffer must be empty at the end of handshake()");
322
323 return refs;
324 }
325
326 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
327 const struct strvec *ref_prefixes)
328 {
329 return handshake(transport, for_push, ref_prefixes, 1);
330 }
331
332 static int fetch_refs_via_pack(struct transport *transport,
333 int nr_heads, struct ref **to_fetch)
334 {
335 int ret = 0;
336 struct git_transport_data *data = transport->data;
337 struct ref *refs = NULL;
338 struct fetch_pack_args args;
339 struct ref *refs_tmp = NULL;
340
341 memset(&args, 0, sizeof(args));
342 args.uploadpack = data->options.uploadpack;
343 args.keep_pack = data->options.keep;
344 args.lock_pack = 1;
345 args.use_thin_pack = data->options.thin;
346 args.include_tag = data->options.followtags;
347 args.verbose = (transport->verbose > 1);
348 args.quiet = (transport->verbose < 0);
349 args.no_progress = !transport->progress;
350 args.depth = data->options.depth;
351 args.deepen_since = data->options.deepen_since;
352 args.deepen_not = data->options.deepen_not;
353 args.deepen_relative = data->options.deepen_relative;
354 args.check_self_contained_and_connected =
355 data->options.check_self_contained_and_connected;
356 args.cloning = transport->cloning;
357 args.update_shallow = data->options.update_shallow;
358 args.from_promisor = data->options.from_promisor;
359 args.filter_options = data->options.filter_options;
360 args.stateless_rpc = transport->stateless_rpc;
361 args.server_options = transport->server_options;
362 args.negotiation_tips = data->options.negotiation_tips;
363
364 if (!data->got_remote_heads) {
365 int i;
366 int must_list_refs = 0;
367 for (i = 0; i < nr_heads; i++) {
368 if (!to_fetch[i]->exact_oid) {
369 must_list_refs = 1;
370 break;
371 }
372 }
373 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
374 }
375
376 if (data->version == protocol_unknown_version)
377 BUG("unknown protocol version");
378 else if (data->version <= protocol_v1)
379 die_if_server_options(transport);
380
381 refs = fetch_pack(&args, data->fd,
382 refs_tmp ? refs_tmp : transport->remote_refs,
383 to_fetch, nr_heads, &data->shallow,
384 &transport->pack_lockfiles, data->version);
385
386 close(data->fd[0]);
387 close(data->fd[1]);
388 if (finish_connect(data->conn))
389 ret = -1;
390 data->conn = NULL;
391 data->got_remote_heads = 0;
392 data->options.self_contained_and_connected =
393 args.self_contained_and_connected;
394 data->options.connectivity_checked = args.connectivity_checked;
395
396 if (refs == NULL)
397 ret = -1;
398 if (report_unmatched_refs(to_fetch, nr_heads))
399 ret = -1;
400
401 free_refs(refs_tmp);
402 free_refs(refs);
403 return ret;
404 }
405
406 static int push_had_errors(struct ref *ref)
407 {
408 for (; ref; ref = ref->next) {
409 switch (ref->status) {
410 case REF_STATUS_NONE:
411 case REF_STATUS_UPTODATE:
412 case REF_STATUS_OK:
413 break;
414 default:
415 return 1;
416 }
417 }
418 return 0;
419 }
420
421 int transport_refs_pushed(struct ref *ref)
422 {
423 for (; ref; ref = ref->next) {
424 switch(ref->status) {
425 case REF_STATUS_NONE:
426 case REF_STATUS_UPTODATE:
427 break;
428 default:
429 return 1;
430 }
431 }
432 return 0;
433 }
434
435 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
436 {
437 struct refspec_item rs;
438
439 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
440 return;
441
442 memset(&rs, 0, sizeof(rs));
443 rs.src = ref->name;
444 rs.dst = NULL;
445
446 if (!remote_find_tracking(remote, &rs)) {
447 if (verbose)
448 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
449 if (ref->deletion) {
450 delete_ref(NULL, rs.dst, NULL, 0);
451 } else
452 update_ref("update by push", rs.dst, &ref->new_oid,
453 NULL, 0, 0);
454 free(rs.dst);
455 }
456 }
457
458 static void print_ref_status(char flag, const char *summary,
459 struct ref *to, struct ref *from, const char *msg,
460 int porcelain, int summary_width)
461 {
462 if (porcelain) {
463 if (from)
464 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
465 else
466 fprintf(stdout, "%c\t:%s\t", flag, to->name);
467 if (msg)
468 fprintf(stdout, "%s (%s)\n", summary, msg);
469 else
470 fprintf(stdout, "%s\n", summary);
471 } else {
472 const char *red = "", *reset = "";
473 if (push_had_errors(to)) {
474 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
475 reset = transport_get_color(TRANSPORT_COLOR_RESET);
476 }
477 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
478 summary, reset);
479 if (from)
480 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
481 else
482 fputs(prettify_refname(to->name), stderr);
483 if (msg) {
484 fputs(" (", stderr);
485 fputs(msg, stderr);
486 fputc(')', stderr);
487 }
488 fputc('\n', stderr);
489 }
490 }
491
492 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
493 {
494 if (ref->deletion)
495 print_ref_status('-', "[deleted]", ref, NULL, NULL,
496 porcelain, summary_width);
497 else if (is_null_oid(&ref->old_oid))
498 print_ref_status('*',
499 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
500 "[new branch]"),
501 ref, ref->peer_ref, NULL, porcelain, summary_width);
502 else {
503 struct strbuf quickref = STRBUF_INIT;
504 char type;
505 const char *msg;
506
507 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
508 DEFAULT_ABBREV);
509 if (ref->forced_update) {
510 strbuf_addstr(&quickref, "...");
511 type = '+';
512 msg = "forced update";
513 } else {
514 strbuf_addstr(&quickref, "..");
515 type = ' ';
516 msg = NULL;
517 }
518 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
519 DEFAULT_ABBREV);
520
521 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
522 porcelain, summary_width);
523 strbuf_release(&quickref);
524 }
525 }
526
527 static int print_one_push_status(struct ref *ref, const char *dest, int count,
528 int porcelain, int summary_width)
529 {
530 if (!count) {
531 char *url = transport_anonymize_url(dest);
532 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
533 free(url);
534 }
535
536 switch(ref->status) {
537 case REF_STATUS_NONE:
538 print_ref_status('X', "[no match]", ref, NULL, NULL,
539 porcelain, summary_width);
540 break;
541 case REF_STATUS_REJECT_NODELETE:
542 print_ref_status('!', "[rejected]", ref, NULL,
543 "remote does not support deleting refs",
544 porcelain, summary_width);
545 break;
546 case REF_STATUS_UPTODATE:
547 print_ref_status('=', "[up to date]", ref,
548 ref->peer_ref, NULL, porcelain, summary_width);
549 break;
550 case REF_STATUS_REJECT_NONFASTFORWARD:
551 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
552 "non-fast-forward", porcelain, summary_width);
553 break;
554 case REF_STATUS_REJECT_ALREADY_EXISTS:
555 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
556 "already exists", porcelain, summary_width);
557 break;
558 case REF_STATUS_REJECT_FETCH_FIRST:
559 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
560 "fetch first", porcelain, summary_width);
561 break;
562 case REF_STATUS_REJECT_NEEDS_FORCE:
563 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
564 "needs force", porcelain, summary_width);
565 break;
566 case REF_STATUS_REJECT_STALE:
567 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
568 "stale info", porcelain, summary_width);
569 break;
570 case REF_STATUS_REJECT_SHALLOW:
571 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
572 "new shallow roots not allowed",
573 porcelain, summary_width);
574 break;
575 case REF_STATUS_REMOTE_REJECT:
576 print_ref_status('!', "[remote rejected]", ref,
577 ref->deletion ? NULL : ref->peer_ref,
578 ref->remote_status, porcelain, summary_width);
579 break;
580 case REF_STATUS_EXPECTING_REPORT:
581 print_ref_status('!', "[remote failure]", ref,
582 ref->deletion ? NULL : ref->peer_ref,
583 "remote failed to report status",
584 porcelain, summary_width);
585 break;
586 case REF_STATUS_ATOMIC_PUSH_FAILED:
587 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
588 "atomic push failed", porcelain, summary_width);
589 break;
590 case REF_STATUS_OK:
591 print_ok_ref_status(ref, porcelain, summary_width);
592 break;
593 }
594
595 return 1;
596 }
597
598 static int measure_abbrev(const struct object_id *oid, int sofar)
599 {
600 char hex[GIT_MAX_HEXSZ + 1];
601 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
602
603 return (w < sofar) ? sofar : w;
604 }
605
606 int transport_summary_width(const struct ref *refs)
607 {
608 int maxw = -1;
609
610 for (; refs; refs = refs->next) {
611 maxw = measure_abbrev(&refs->old_oid, maxw);
612 maxw = measure_abbrev(&refs->new_oid, maxw);
613 }
614 if (maxw < 0)
615 maxw = FALLBACK_DEFAULT_ABBREV;
616 return (2 * maxw + 3);
617 }
618
619 void transport_print_push_status(const char *dest, struct ref *refs,
620 int verbose, int porcelain, unsigned int *reject_reasons)
621 {
622 struct ref *ref;
623 int n = 0;
624 char *head;
625 int summary_width = transport_summary_width(refs);
626
627 if (transport_color_config() < 0)
628 warning(_("could not parse transport.color.* config"));
629
630 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
631
632 if (verbose) {
633 for (ref = refs; ref; ref = ref->next)
634 if (ref->status == REF_STATUS_UPTODATE)
635 n += print_one_push_status(ref, dest, n,
636 porcelain, summary_width);
637 }
638
639 for (ref = refs; ref; ref = ref->next)
640 if (ref->status == REF_STATUS_OK)
641 n += print_one_push_status(ref, dest, n,
642 porcelain, summary_width);
643
644 *reject_reasons = 0;
645 for (ref = refs; ref; ref = ref->next) {
646 if (ref->status != REF_STATUS_NONE &&
647 ref->status != REF_STATUS_UPTODATE &&
648 ref->status != REF_STATUS_OK)
649 n += print_one_push_status(ref, dest, n,
650 porcelain, summary_width);
651 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
652 if (head != NULL && !strcmp(head, ref->name))
653 *reject_reasons |= REJECT_NON_FF_HEAD;
654 else
655 *reject_reasons |= REJECT_NON_FF_OTHER;
656 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
657 *reject_reasons |= REJECT_ALREADY_EXISTS;
658 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
659 *reject_reasons |= REJECT_FETCH_FIRST;
660 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
661 *reject_reasons |= REJECT_NEEDS_FORCE;
662 }
663 }
664 free(head);
665 }
666
667 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
668 {
669 struct git_transport_data *data = transport->data;
670 struct send_pack_args args;
671 int ret = 0;
672
673 if (transport_color_config() < 0)
674 return -1;
675
676 if (!data->got_remote_heads)
677 get_refs_via_connect(transport, 1, NULL);
678
679 memset(&args, 0, sizeof(args));
680 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
681 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
682 args.use_thin_pack = data->options.thin;
683 args.verbose = (transport->verbose > 0);
684 args.quiet = (transport->verbose < 0);
685 args.progress = transport->progress;
686 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
687 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
688 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
689 args.push_options = transport->push_options;
690 args.url = transport->url;
691
692 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
693 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
694 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
695 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
696 else
697 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
698
699 switch (data->version) {
700 case protocol_v2:
701 die(_("support for protocol v2 not implemented yet"));
702 break;
703 case protocol_v1:
704 case protocol_v0:
705 ret = send_pack(&args, data->fd, data->conn, remote_refs,
706 &data->extra_have);
707 break;
708 case protocol_unknown_version:
709 BUG("unknown protocol version");
710 }
711
712 close(data->fd[1]);
713 close(data->fd[0]);
714 /*
715 * Atomic push may abort the connection early and close the pipe,
716 * which may cause an error for `finish_connect()`. Ignore this error
717 * for atomic git-push.
718 */
719 if (ret || args.atomic)
720 finish_connect(data->conn);
721 else
722 ret = finish_connect(data->conn);
723 data->conn = NULL;
724 data->got_remote_heads = 0;
725
726 return ret;
727 }
728
729 static int connect_git(struct transport *transport, const char *name,
730 const char *executable, int fd[2])
731 {
732 struct git_transport_data *data = transport->data;
733 data->conn = git_connect(data->fd, transport->url,
734 executable, 0);
735 fd[0] = data->fd[0];
736 fd[1] = data->fd[1];
737 return 0;
738 }
739
740 static int disconnect_git(struct transport *transport)
741 {
742 struct git_transport_data *data = transport->data;
743 if (data->conn) {
744 if (data->got_remote_heads && !transport->stateless_rpc)
745 packet_flush(data->fd[1]);
746 close(data->fd[0]);
747 close(data->fd[1]);
748 finish_connect(data->conn);
749 }
750
751 free(data);
752 return 0;
753 }
754
755 static struct transport_vtable taken_over_vtable = {
756 NULL,
757 get_refs_via_connect,
758 fetch_refs_via_pack,
759 git_transport_push,
760 NULL,
761 disconnect_git
762 };
763
764 void transport_take_over(struct transport *transport,
765 struct child_process *child)
766 {
767 struct git_transport_data *data;
768
769 if (!transport->smart_options)
770 BUG("taking over transport requires non-NULL "
771 "smart_options field.");
772
773 data = xcalloc(1, sizeof(*data));
774 data->options = *transport->smart_options;
775 data->conn = child;
776 data->fd[0] = data->conn->out;
777 data->fd[1] = data->conn->in;
778 data->got_remote_heads = 0;
779 transport->data = data;
780
781 transport->vtable = &taken_over_vtable;
782 transport->smart_options = &(data->options);
783
784 transport->cannot_reuse = 1;
785 }
786
787 static int is_file(const char *url)
788 {
789 struct stat buf;
790 if (stat(url, &buf))
791 return 0;
792 return S_ISREG(buf.st_mode);
793 }
794
795 static int external_specification_len(const char *url)
796 {
797 return strchr(url, ':') - url;
798 }
799
800 static const struct string_list *protocol_whitelist(void)
801 {
802 static int enabled = -1;
803 static struct string_list allowed = STRING_LIST_INIT_DUP;
804
805 if (enabled < 0) {
806 const char *v = getenv("GIT_ALLOW_PROTOCOL");
807 if (v) {
808 string_list_split(&allowed, v, ':', -1);
809 string_list_sort(&allowed);
810 enabled = 1;
811 } else {
812 enabled = 0;
813 }
814 }
815
816 return enabled ? &allowed : NULL;
817 }
818
819 enum protocol_allow_config {
820 PROTOCOL_ALLOW_NEVER = 0,
821 PROTOCOL_ALLOW_USER_ONLY,
822 PROTOCOL_ALLOW_ALWAYS
823 };
824
825 static enum protocol_allow_config parse_protocol_config(const char *key,
826 const char *value)
827 {
828 if (!strcasecmp(value, "always"))
829 return PROTOCOL_ALLOW_ALWAYS;
830 else if (!strcasecmp(value, "never"))
831 return PROTOCOL_ALLOW_NEVER;
832 else if (!strcasecmp(value, "user"))
833 return PROTOCOL_ALLOW_USER_ONLY;
834
835 die(_("unknown value for config '%s': %s"), key, value);
836 }
837
838 static enum protocol_allow_config get_protocol_config(const char *type)
839 {
840 char *key = xstrfmt("protocol.%s.allow", type);
841 char *value;
842
843 /* first check the per-protocol config */
844 if (!git_config_get_string(key, &value)) {
845 enum protocol_allow_config ret =
846 parse_protocol_config(key, value);
847 free(key);
848 free(value);
849 return ret;
850 }
851 free(key);
852
853 /* if defined, fallback to user-defined default for unknown protocols */
854 if (!git_config_get_string("protocol.allow", &value)) {
855 enum protocol_allow_config ret =
856 parse_protocol_config("protocol.allow", value);
857 free(value);
858 return ret;
859 }
860
861 /* fallback to built-in defaults */
862 /* known safe */
863 if (!strcmp(type, "http") ||
864 !strcmp(type, "https") ||
865 !strcmp(type, "git") ||
866 !strcmp(type, "ssh") ||
867 !strcmp(type, "file"))
868 return PROTOCOL_ALLOW_ALWAYS;
869
870 /* known scary; err on the side of caution */
871 if (!strcmp(type, "ext"))
872 return PROTOCOL_ALLOW_NEVER;
873
874 /* unknown; by default let them be used only directly by the user */
875 return PROTOCOL_ALLOW_USER_ONLY;
876 }
877
878 int is_transport_allowed(const char *type, int from_user)
879 {
880 const struct string_list *whitelist = protocol_whitelist();
881 if (whitelist)
882 return string_list_has_string(whitelist, type);
883
884 switch (get_protocol_config(type)) {
885 case PROTOCOL_ALLOW_ALWAYS:
886 return 1;
887 case PROTOCOL_ALLOW_NEVER:
888 return 0;
889 case PROTOCOL_ALLOW_USER_ONLY:
890 if (from_user < 0)
891 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
892 return from_user;
893 }
894
895 BUG("invalid protocol_allow_config type");
896 }
897
898 void transport_check_allowed(const char *type)
899 {
900 if (!is_transport_allowed(type, -1))
901 die(_("transport '%s' not allowed"), type);
902 }
903
904 static struct transport_vtable bundle_vtable = {
905 NULL,
906 get_refs_from_bundle,
907 fetch_refs_from_bundle,
908 NULL,
909 NULL,
910 close_bundle
911 };
912
913 static struct transport_vtable builtin_smart_vtable = {
914 NULL,
915 get_refs_via_connect,
916 fetch_refs_via_pack,
917 git_transport_push,
918 connect_git,
919 disconnect_git
920 };
921
922 struct transport *transport_get(struct remote *remote, const char *url)
923 {
924 const char *helper;
925 struct transport *ret = xcalloc(1, sizeof(*ret));
926
927 ret->progress = isatty(2);
928 string_list_init(&ret->pack_lockfiles, 1);
929
930 if (!remote)
931 BUG("No remote provided to transport_get()");
932
933 ret->got_remote_refs = 0;
934 ret->remote = remote;
935 helper = remote->foreign_vcs;
936
937 if (!url && remote->url)
938 url = remote->url[0];
939 ret->url = url;
940
941 /* maybe it is a foreign URL? */
942 if (url) {
943 const char *p = url;
944
945 while (is_urlschemechar(p == url, *p))
946 p++;
947 if (starts_with(p, "::"))
948 helper = xstrndup(url, p - url);
949 }
950
951 if (helper) {
952 transport_helper_init(ret, helper);
953 } else if (starts_with(url, "rsync:")) {
954 die(_("git-over-rsync is no longer supported"));
955 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
956 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
957 transport_check_allowed("file");
958 ret->data = data;
959 ret->vtable = &bundle_vtable;
960 ret->smart_options = NULL;
961 } else if (!is_url(url)
962 || starts_with(url, "file://")
963 || starts_with(url, "git://")
964 || starts_with(url, "ssh://")
965 || starts_with(url, "git+ssh://") /* deprecated - do not use */
966 || starts_with(url, "ssh+git://") /* deprecated - do not use */
967 ) {
968 /*
969 * These are builtin smart transports; "allowed" transports
970 * will be checked individually in git_connect.
971 */
972 struct git_transport_data *data = xcalloc(1, sizeof(*data));
973 ret->data = data;
974 ret->vtable = &builtin_smart_vtable;
975 ret->smart_options = &(data->options);
976
977 data->conn = NULL;
978 data->got_remote_heads = 0;
979 } else {
980 /* Unknown protocol in URL. Pass to external handler. */
981 int len = external_specification_len(url);
982 char *handler = xmemdupz(url, len);
983 transport_helper_init(ret, handler);
984 }
985
986 if (ret->smart_options) {
987 ret->smart_options->thin = 1;
988 ret->smart_options->uploadpack = "git-upload-pack";
989 if (remote->uploadpack)
990 ret->smart_options->uploadpack = remote->uploadpack;
991 ret->smart_options->receivepack = "git-receive-pack";
992 if (remote->receivepack)
993 ret->smart_options->receivepack = remote->receivepack;
994 }
995
996 ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
997
998 return ret;
999 }
1000
1001 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1002 {
1003 return transport->hash_algo;
1004 }
1005
1006 int transport_set_option(struct transport *transport,
1007 const char *name, const char *value)
1008 {
1009 int git_reports = 1, protocol_reports = 1;
1010
1011 if (transport->smart_options)
1012 git_reports = set_git_option(transport->smart_options,
1013 name, value);
1014
1015 if (transport->vtable->set_option)
1016 protocol_reports = transport->vtable->set_option(transport,
1017 name, value);
1018
1019 /* If either report is 0, report 0 (success). */
1020 if (!git_reports || !protocol_reports)
1021 return 0;
1022 /* If either reports -1 (invalid value), report -1. */
1023 if ((git_reports == -1) || (protocol_reports == -1))
1024 return -1;
1025 /* Otherwise if both report unknown, report unknown. */
1026 return 1;
1027 }
1028
1029 void transport_set_verbosity(struct transport *transport, int verbosity,
1030 int force_progress)
1031 {
1032 if (verbosity >= 1)
1033 transport->verbose = verbosity <= 3 ? verbosity : 3;
1034 if (verbosity < 0)
1035 transport->verbose = -1;
1036
1037 /**
1038 * Rules used to determine whether to report progress (processing aborts
1039 * when a rule is satisfied):
1040 *
1041 * . Report progress, if force_progress is 1 (ie. --progress).
1042 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1043 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1044 * . Report progress if isatty(2) is 1.
1045 **/
1046 if (force_progress >= 0)
1047 transport->progress = !!force_progress;
1048 else
1049 transport->progress = verbosity >= 0 && isatty(2);
1050 }
1051
1052 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1053 {
1054 int i;
1055
1056 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1057 "not be found on any remote:\n"));
1058 for (i = 0; i < needs_pushing->nr; i++)
1059 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1060 fprintf(stderr, _("\nPlease try\n\n"
1061 " git push --recurse-submodules=on-demand\n\n"
1062 "or cd to the path and use\n\n"
1063 " git push\n\n"
1064 "to push them to a remote.\n\n"));
1065
1066 string_list_clear(needs_pushing, 0);
1067
1068 die(_("Aborting."));
1069 }
1070
1071 static int run_pre_push_hook(struct transport *transport,
1072 struct ref *remote_refs)
1073 {
1074 int ret = 0, x;
1075 struct ref *r;
1076 struct child_process proc = CHILD_PROCESS_INIT;
1077 struct strbuf buf;
1078 const char *argv[4];
1079
1080 if (!(argv[0] = find_hook("pre-push")))
1081 return 0;
1082
1083 argv[1] = transport->remote->name;
1084 argv[2] = transport->url;
1085 argv[3] = NULL;
1086
1087 proc.argv = argv;
1088 proc.in = -1;
1089 proc.trace2_hook_name = "pre-push";
1090
1091 if (start_command(&proc)) {
1092 finish_command(&proc);
1093 return -1;
1094 }
1095
1096 sigchain_push(SIGPIPE, SIG_IGN);
1097
1098 strbuf_init(&buf, 256);
1099
1100 for (r = remote_refs; r; r = r->next) {
1101 if (!r->peer_ref) continue;
1102 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1103 if (r->status == REF_STATUS_REJECT_STALE) continue;
1104 if (r->status == REF_STATUS_UPTODATE) continue;
1105
1106 strbuf_reset(&buf);
1107 strbuf_addf( &buf, "%s %s %s %s\n",
1108 r->peer_ref->name, oid_to_hex(&r->new_oid),
1109 r->name, oid_to_hex(&r->old_oid));
1110
1111 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1112 /* We do not mind if a hook does not read all refs. */
1113 if (errno != EPIPE)
1114 ret = -1;
1115 break;
1116 }
1117 }
1118
1119 strbuf_release(&buf);
1120
1121 x = close(proc.in);
1122 if (!ret)
1123 ret = x;
1124
1125 sigchain_pop(SIGPIPE);
1126
1127 x = finish_command(&proc);
1128 if (!ret)
1129 ret = x;
1130
1131 return ret;
1132 }
1133
1134 int transport_push(struct repository *r,
1135 struct transport *transport,
1136 struct refspec *rs, int flags,
1137 unsigned int *reject_reasons)
1138 {
1139 *reject_reasons = 0;
1140
1141 if (transport_color_config() < 0)
1142 return -1;
1143
1144 if (transport->vtable->push_refs) {
1145 struct ref *remote_refs;
1146 struct ref *local_refs = get_local_heads();
1147 int match_flags = MATCH_REFS_NONE;
1148 int verbose = (transport->verbose > 0);
1149 int quiet = (transport->verbose < 0);
1150 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1151 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1152 int push_ret, ret, err;
1153 struct strvec ref_prefixes = STRVEC_INIT;
1154
1155 if (check_push_refs(local_refs, rs) < 0)
1156 return -1;
1157
1158 refspec_ref_prefixes(rs, &ref_prefixes);
1159
1160 trace2_region_enter("transport_push", "get_refs_list", r);
1161 remote_refs = transport->vtable->get_refs_list(transport, 1,
1162 &ref_prefixes);
1163 trace2_region_leave("transport_push", "get_refs_list", r);
1164
1165 strvec_clear(&ref_prefixes);
1166
1167 if (flags & TRANSPORT_PUSH_ALL)
1168 match_flags |= MATCH_REFS_ALL;
1169 if (flags & TRANSPORT_PUSH_MIRROR)
1170 match_flags |= MATCH_REFS_MIRROR;
1171 if (flags & TRANSPORT_PUSH_PRUNE)
1172 match_flags |= MATCH_REFS_PRUNE;
1173 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1174 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1175
1176 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1177 return -1;
1178
1179 if (transport->smart_options &&
1180 transport->smart_options->cas &&
1181 !is_empty_cas(transport->smart_options->cas))
1182 apply_push_cas(transport->smart_options->cas,
1183 transport->remote, remote_refs);
1184
1185 set_ref_status_for_push(remote_refs,
1186 flags & TRANSPORT_PUSH_MIRROR,
1187 flags & TRANSPORT_PUSH_FORCE);
1188
1189 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1190 if (run_pre_push_hook(transport, remote_refs))
1191 return -1;
1192
1193 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1194 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1195 !is_bare_repository()) {
1196 struct ref *ref = remote_refs;
1197 struct oid_array commits = OID_ARRAY_INIT;
1198
1199 trace2_region_enter("transport_push", "push_submodules", r);
1200 for (; ref; ref = ref->next)
1201 if (!is_null_oid(&ref->new_oid))
1202 oid_array_append(&commits,
1203 &ref->new_oid);
1204
1205 if (!push_unpushed_submodules(r,
1206 &commits,
1207 transport->remote,
1208 rs,
1209 transport->push_options,
1210 pretend)) {
1211 oid_array_clear(&commits);
1212 trace2_region_leave("transport_push", "push_submodules", r);
1213 die(_("failed to push all needed submodules"));
1214 }
1215 oid_array_clear(&commits);
1216 trace2_region_leave("transport_push", "push_submodules", r);
1217 }
1218
1219 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1220 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1221 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1222 !pretend)) && !is_bare_repository()) {
1223 struct ref *ref = remote_refs;
1224 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1225 struct oid_array commits = OID_ARRAY_INIT;
1226
1227 trace2_region_enter("transport_push", "check_submodules", r);
1228 for (; ref; ref = ref->next)
1229 if (!is_null_oid(&ref->new_oid))
1230 oid_array_append(&commits,
1231 &ref->new_oid);
1232
1233 if (find_unpushed_submodules(r,
1234 &commits,
1235 transport->remote->name,
1236 &needs_pushing)) {
1237 oid_array_clear(&commits);
1238 trace2_region_leave("transport_push", "check_submodules", r);
1239 die_with_unpushed_submodules(&needs_pushing);
1240 }
1241 string_list_clear(&needs_pushing, 0);
1242 oid_array_clear(&commits);
1243 trace2_region_leave("transport_push", "check_submodules", r);
1244 }
1245
1246 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1247 trace2_region_enter("transport_push", "push_refs", r);
1248 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1249 trace2_region_leave("transport_push", "push_refs", r);
1250 } else
1251 push_ret = 0;
1252 err = push_had_errors(remote_refs);
1253 ret = push_ret | err;
1254
1255 if (!quiet || err)
1256 transport_print_push_status(transport->url, remote_refs,
1257 verbose | porcelain, porcelain,
1258 reject_reasons);
1259
1260 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1261 set_upstreams(transport, remote_refs, pretend);
1262
1263 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1264 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1265 struct ref *ref;
1266 for (ref = remote_refs; ref; ref = ref->next)
1267 transport_update_tracking_ref(transport->remote, ref, verbose);
1268 }
1269
1270 if (porcelain && !push_ret)
1271 puts("Done");
1272 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1273 fprintf(stderr, "Everything up-to-date\n");
1274
1275 return ret;
1276 }
1277 return 1;
1278 }
1279
1280 const struct ref *transport_get_remote_refs(struct transport *transport,
1281 const struct strvec *ref_prefixes)
1282 {
1283 if (!transport->got_remote_refs) {
1284 transport->remote_refs =
1285 transport->vtable->get_refs_list(transport, 0,
1286 ref_prefixes);
1287 transport->got_remote_refs = 1;
1288 }
1289
1290 return transport->remote_refs;
1291 }
1292
1293 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1294 {
1295 int rc;
1296 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1297 struct ref **heads = NULL;
1298 struct ref *rm;
1299
1300 for (rm = refs; rm; rm = rm->next) {
1301 nr_refs++;
1302 if (rm->peer_ref &&
1303 !is_null_oid(&rm->old_oid) &&
1304 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1305 continue;
1306 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1307 heads[nr_heads++] = rm;
1308 }
1309
1310 if (!nr_heads) {
1311 /*
1312 * When deepening of a shallow repository is requested,
1313 * then local and remote refs are likely to still be equal.
1314 * Just feed them all to the fetch method in that case.
1315 * This condition shouldn't be met in a non-deepening fetch
1316 * (see builtin/fetch.c:quickfetch()).
1317 */
1318 ALLOC_ARRAY(heads, nr_refs);
1319 for (rm = refs; rm; rm = rm->next)
1320 heads[nr_heads++] = rm;
1321 }
1322
1323 rc = transport->vtable->fetch(transport, nr_heads, heads);
1324
1325 free(heads);
1326 return rc;
1327 }
1328
1329 void transport_unlock_pack(struct transport *transport)
1330 {
1331 int i;
1332
1333 for (i = 0; i < transport->pack_lockfiles.nr; i++)
1334 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1335 string_list_clear(&transport->pack_lockfiles, 0);
1336 }
1337
1338 int transport_connect(struct transport *transport, const char *name,
1339 const char *exec, int fd[2])
1340 {
1341 if (transport->vtable->connect)
1342 return transport->vtable->connect(transport, name, exec, fd);
1343 else
1344 die(_("operation not supported by protocol"));
1345 }
1346
1347 int transport_disconnect(struct transport *transport)
1348 {
1349 int ret = 0;
1350 if (transport->vtable->disconnect)
1351 ret = transport->vtable->disconnect(transport);
1352 free(transport);
1353 return ret;
1354 }
1355
1356 /*
1357 * Strip username (and password) from a URL and return
1358 * it in a newly allocated string.
1359 */
1360 char *transport_anonymize_url(const char *url)
1361 {
1362 char *scheme_prefix, *anon_part;
1363 size_t anon_len, prefix_len = 0;
1364
1365 anon_part = strchr(url, '@');
1366 if (url_is_local_not_ssh(url) || !anon_part)
1367 goto literal_copy;
1368
1369 anon_len = strlen(++anon_part);
1370 scheme_prefix = strstr(url, "://");
1371 if (!scheme_prefix) {
1372 if (!strchr(anon_part, ':'))
1373 /* cannot be "me@there:/path/name" */
1374 goto literal_copy;
1375 } else {
1376 const char *cp;
1377 /* make sure scheme is reasonable */
1378 for (cp = url; cp < scheme_prefix; cp++) {
1379 switch (*cp) {
1380 /* RFC 1738 2.1 */
1381 case '+': case '.': case '-':
1382 break; /* ok */
1383 default:
1384 if (isalnum(*cp))
1385 break;
1386 /* it isn't */
1387 goto literal_copy;
1388 }
1389 }
1390 /* @ past the first slash does not count */
1391 cp = strchr(scheme_prefix + 3, '/');
1392 if (cp && cp < anon_part)
1393 goto literal_copy;
1394 prefix_len = scheme_prefix - url + 3;
1395 }
1396 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1397 (int)anon_len, anon_part);
1398 literal_copy:
1399 return xstrdup(url);
1400 }
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