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doc: fix wrong 4-byte length of pkt-line message
[git.git] / transport.c
blob1fdc7dac1a6230bdf3492cbebd6642fc825dac5f
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 "sha1-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 argv_array *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 for (i = 0; i < data->header.references.nr; i++) {
147 struct ref_list_entry *e = data->header.references.list + i;
148 struct ref *ref = alloc_ref(e->name);
149 oidcpy(&ref->old_oid, &e->oid);
150 ref->next = result;
151 result = ref;
152 }
153 return result;
154 }
155
156 static int fetch_refs_from_bundle(struct transport *transport,
157 int nr_heads, struct ref **to_fetch)
158 {
159 struct bundle_transport_data *data = transport->data;
160
161 if (!data->get_refs_from_bundle_called)
162 get_refs_from_bundle(transport, 0, NULL);
163 return unbundle(the_repository, &data->header, data->fd,
164 transport->progress ? BUNDLE_VERBOSE : 0);
165 }
166
167 static int close_bundle(struct transport *transport)
168 {
169 struct bundle_transport_data *data = transport->data;
170 if (data->fd > 0)
171 close(data->fd);
172 free(data);
173 return 0;
174 }
175
176 struct git_transport_data {
177 struct git_transport_options options;
178 struct child_process *conn;
179 int fd[2];
180 unsigned got_remote_heads : 1;
181 enum protocol_version version;
182 struct oid_array extra_have;
183 struct oid_array shallow;
184 };
185
186 static int set_git_option(struct git_transport_options *opts,
187 const char *name, const char *value)
188 {
189 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
190 opts->uploadpack = value;
191 return 0;
192 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
193 opts->receivepack = value;
194 return 0;
195 } else if (!strcmp(name, TRANS_OPT_THIN)) {
196 opts->thin = !!value;
197 return 0;
198 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
199 opts->followtags = !!value;
200 return 0;
201 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
202 opts->keep = !!value;
203 return 0;
204 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
205 opts->update_shallow = !!value;
206 return 0;
207 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
208 if (!value)
209 opts->depth = 0;
210 else {
211 char *end;
212 opts->depth = strtol(value, &end, 0);
213 if (*end)
214 die(_("transport: invalid depth option '%s'"), value);
215 }
216 return 0;
217 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
218 opts->deepen_since = value;
219 return 0;
220 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
221 opts->deepen_not = (const struct string_list *)value;
222 return 0;
223 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
224 opts->deepen_relative = !!value;
225 return 0;
226 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
227 opts->from_promisor = !!value;
228 return 0;
229 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
230 opts->no_dependents = !!value;
231 return 0;
232 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
233 list_objects_filter_die_if_populated(&opts->filter_options);
234 parse_list_objects_filter(&opts->filter_options, value);
235 return 0;
236 }
237 return 1;
238 }
239
240 static int connect_setup(struct transport *transport, int for_push)
241 {
242 struct git_transport_data *data = transport->data;
243 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
244
245 if (data->conn)
246 return 0;
247
248 switch (transport->family) {
249 case TRANSPORT_FAMILY_ALL: break;
250 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
251 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
252 }
253
254 data->conn = git_connect(data->fd, transport->url,
255 for_push ? data->options.receivepack :
256 data->options.uploadpack,
257 flags);
258
259 return 0;
260 }
261
262 static void die_if_server_options(struct transport *transport)
263 {
264 if (!transport->server_options || !transport->server_options->nr)
265 return;
266 advise(_("see protocol.version in 'git help config' for more details"));
267 die(_("server options require protocol version 2 or later"));
268 }
269
270 /*
271 * Obtains the protocol version from the transport and writes it to
272 * transport->data->version, first connecting if not already connected.
273 *
274 * If the protocol version is one that allows skipping the listing of remote
275 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
276 * this function returns NULL. Otherwise, this function returns the list of
277 * remote refs.
278 */
279 static struct ref *handshake(struct transport *transport, int for_push,
280 const struct argv_array *ref_prefixes,
281 int must_list_refs)
282 {
283 struct git_transport_data *data = transport->data;
284 struct ref *refs = NULL;
285 struct packet_reader reader;
286
287 connect_setup(transport, for_push);
288
289 packet_reader_init(&reader, data->fd[0], NULL, 0,
290 PACKET_READ_CHOMP_NEWLINE |
291 PACKET_READ_GENTLE_ON_EOF |
292 PACKET_READ_DIE_ON_ERR_PACKET);
293
294 data->version = discover_version(&reader);
295 switch (data->version) {
296 case protocol_v2:
297 if (must_list_refs)
298 get_remote_refs(data->fd[1], &reader, &refs, for_push,
299 ref_prefixes,
300 transport->server_options);
301 break;
302 case protocol_v1:
303 case protocol_v0:
304 die_if_server_options(transport);
305 get_remote_heads(&reader, &refs,
306 for_push ? REF_NORMAL : 0,
307 &data->extra_have,
308 &data->shallow);
309 break;
310 case protocol_unknown_version:
311 BUG("unknown protocol version");
312 }
313 data->got_remote_heads = 1;
314
315 if (reader.line_peeked)
316 BUG("buffer must be empty at the end of handshake()");
317
318 return refs;
319 }
320
321 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
322 const struct argv_array *ref_prefixes)
323 {
324 return handshake(transport, for_push, ref_prefixes, 1);
325 }
326
327 static int fetch_refs_via_pack(struct transport *transport,
328 int nr_heads, struct ref **to_fetch)
329 {
330 int ret = 0;
331 struct git_transport_data *data = transport->data;
332 struct ref *refs = NULL;
333 struct fetch_pack_args args;
334 struct ref *refs_tmp = NULL;
335
336 memset(&args, 0, sizeof(args));
337 args.uploadpack = data->options.uploadpack;
338 args.keep_pack = data->options.keep;
339 args.lock_pack = 1;
340 args.use_thin_pack = data->options.thin;
341 args.include_tag = data->options.followtags;
342 args.verbose = (transport->verbose > 1);
343 args.quiet = (transport->verbose < 0);
344 args.no_progress = !transport->progress;
345 args.depth = data->options.depth;
346 args.deepen_since = data->options.deepen_since;
347 args.deepen_not = data->options.deepen_not;
348 args.deepen_relative = data->options.deepen_relative;
349 args.check_self_contained_and_connected =
350 data->options.check_self_contained_and_connected;
351 args.cloning = transport->cloning;
352 args.update_shallow = data->options.update_shallow;
353 args.from_promisor = data->options.from_promisor;
354 args.no_dependents = data->options.no_dependents;
355 args.filter_options = data->options.filter_options;
356 args.stateless_rpc = transport->stateless_rpc;
357 args.server_options = transport->server_options;
358 args.negotiation_tips = data->options.negotiation_tips;
359
360 if (!data->got_remote_heads) {
361 int i;
362 int must_list_refs = 0;
363 for (i = 0; i < nr_heads; i++) {
364 if (!to_fetch[i]->exact_oid) {
365 must_list_refs = 1;
366 break;
367 }
368 }
369 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
370 }
371
372 switch (data->version) {
373 case protocol_v2:
374 refs = fetch_pack(&args, data->fd,
375 refs_tmp ? refs_tmp : transport->remote_refs,
376 to_fetch, nr_heads, &data->shallow,
377 &transport->pack_lockfile, data->version);
378 break;
379 case protocol_v1:
380 case protocol_v0:
381 die_if_server_options(transport);
382 refs = fetch_pack(&args, data->fd,
383 refs_tmp ? refs_tmp : transport->remote_refs,
384 to_fetch, nr_heads, &data->shallow,
385 &transport->pack_lockfile, data->version);
386 break;
387 case protocol_unknown_version:
388 BUG("unknown protocol version");
389 }
390
391 close(data->fd[0]);
392 close(data->fd[1]);
393 if (finish_connect(data->conn))
394 ret = -1;
395 data->conn = NULL;
396 data->got_remote_heads = 0;
397 data->options.self_contained_and_connected =
398 args.self_contained_and_connected;
399 data->options.connectivity_checked = args.connectivity_checked;
400
401 if (refs == NULL)
402 ret = -1;
403 if (report_unmatched_refs(to_fetch, nr_heads))
404 ret = -1;
405
406 free_refs(refs_tmp);
407 free_refs(refs);
408 return ret;
409 }
410
411 static int push_had_errors(struct ref *ref)
412 {
413 for (; ref; ref = ref->next) {
414 switch (ref->status) {
415 case REF_STATUS_NONE:
416 case REF_STATUS_UPTODATE:
417 case REF_STATUS_OK:
418 break;
419 default:
420 return 1;
421 }
422 }
423 return 0;
424 }
425
426 int transport_refs_pushed(struct ref *ref)
427 {
428 for (; ref; ref = ref->next) {
429 switch(ref->status) {
430 case REF_STATUS_NONE:
431 case REF_STATUS_UPTODATE:
432 break;
433 default:
434 return 1;
435 }
436 }
437 return 0;
438 }
439
440 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
441 {
442 struct refspec_item rs;
443
444 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
445 return;
446
447 rs.src = ref->name;
448 rs.dst = NULL;
449
450 if (!remote_find_tracking(remote, &rs)) {
451 if (verbose)
452 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
453 if (ref->deletion) {
454 delete_ref(NULL, rs.dst, NULL, 0);
455 } else
456 update_ref("update by push", rs.dst, &ref->new_oid,
457 NULL, 0, 0);
458 free(rs.dst);
459 }
460 }
461
462 static void print_ref_status(char flag, const char *summary,
463 struct ref *to, struct ref *from, const char *msg,
464 int porcelain, int summary_width)
465 {
466 if (porcelain) {
467 if (from)
468 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
469 else
470 fprintf(stdout, "%c\t:%s\t", flag, to->name);
471 if (msg)
472 fprintf(stdout, "%s (%s)\n", summary, msg);
473 else
474 fprintf(stdout, "%s\n", summary);
475 } else {
476 const char *red = "", *reset = "";
477 if (push_had_errors(to)) {
478 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
479 reset = transport_get_color(TRANSPORT_COLOR_RESET);
480 }
481 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
482 summary, reset);
483 if (from)
484 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
485 else
486 fputs(prettify_refname(to->name), stderr);
487 if (msg) {
488 fputs(" (", stderr);
489 fputs(msg, stderr);
490 fputc(')', stderr);
491 }
492 fputc('\n', stderr);
493 }
494 }
495
496 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
497 {
498 if (ref->deletion)
499 print_ref_status('-', "[deleted]", ref, NULL, NULL,
500 porcelain, summary_width);
501 else if (is_null_oid(&ref->old_oid))
502 print_ref_status('*',
503 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
504 "[new branch]"),
505 ref, ref->peer_ref, NULL, porcelain, summary_width);
506 else {
507 struct strbuf quickref = STRBUF_INIT;
508 char type;
509 const char *msg;
510
511 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
512 DEFAULT_ABBREV);
513 if (ref->forced_update) {
514 strbuf_addstr(&quickref, "...");
515 type = '+';
516 msg = "forced update";
517 } else {
518 strbuf_addstr(&quickref, "..");
519 type = ' ';
520 msg = NULL;
521 }
522 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
523 DEFAULT_ABBREV);
524
525 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
526 porcelain, summary_width);
527 strbuf_release(&quickref);
528 }
529 }
530
531 static int print_one_push_status(struct ref *ref, const char *dest, int count,
532 int porcelain, int summary_width)
533 {
534 if (!count) {
535 char *url = transport_anonymize_url(dest);
536 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
537 free(url);
538 }
539
540 switch(ref->status) {
541 case REF_STATUS_NONE:
542 print_ref_status('X', "[no match]", ref, NULL, NULL,
543 porcelain, summary_width);
544 break;
545 case REF_STATUS_REJECT_NODELETE:
546 print_ref_status('!', "[rejected]", ref, NULL,
547 "remote does not support deleting refs",
548 porcelain, summary_width);
549 break;
550 case REF_STATUS_UPTODATE:
551 print_ref_status('=', "[up to date]", ref,
552 ref->peer_ref, NULL, porcelain, summary_width);
553 break;
554 case REF_STATUS_REJECT_NONFASTFORWARD:
555 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
556 "non-fast-forward", porcelain, summary_width);
557 break;
558 case REF_STATUS_REJECT_ALREADY_EXISTS:
559 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
560 "already exists", porcelain, summary_width);
561 break;
562 case REF_STATUS_REJECT_FETCH_FIRST:
563 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
564 "fetch first", porcelain, summary_width);
565 break;
566 case REF_STATUS_REJECT_NEEDS_FORCE:
567 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
568 "needs force", porcelain, summary_width);
569 break;
570 case REF_STATUS_REJECT_STALE:
571 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
572 "stale info", porcelain, summary_width);
573 break;
574 case REF_STATUS_REJECT_SHALLOW:
575 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
576 "new shallow roots not allowed",
577 porcelain, summary_width);
578 break;
579 case REF_STATUS_REMOTE_REJECT:
580 print_ref_status('!', "[remote rejected]", ref,
581 ref->deletion ? NULL : ref->peer_ref,
582 ref->remote_status, porcelain, summary_width);
583 break;
584 case REF_STATUS_EXPECTING_REPORT:
585 print_ref_status('!', "[remote failure]", ref,
586 ref->deletion ? NULL : ref->peer_ref,
587 "remote failed to report status",
588 porcelain, summary_width);
589 break;
590 case REF_STATUS_ATOMIC_PUSH_FAILED:
591 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
592 "atomic push failed", porcelain, summary_width);
593 break;
594 case REF_STATUS_OK:
595 print_ok_ref_status(ref, porcelain, summary_width);
596 break;
597 }
598
599 return 1;
600 }
601
602 static int measure_abbrev(const struct object_id *oid, int sofar)
603 {
604 char hex[GIT_MAX_HEXSZ + 1];
605 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
606
607 return (w < sofar) ? sofar : w;
608 }
609
610 int transport_summary_width(const struct ref *refs)
611 {
612 int maxw = -1;
613
614 for (; refs; refs = refs->next) {
615 maxw = measure_abbrev(&refs->old_oid, maxw);
616 maxw = measure_abbrev(&refs->new_oid, maxw);
617 }
618 if (maxw < 0)
619 maxw = FALLBACK_DEFAULT_ABBREV;
620 return (2 * maxw + 3);
621 }
622
623 void transport_print_push_status(const char *dest, struct ref *refs,
624 int verbose, int porcelain, unsigned int *reject_reasons)
625 {
626 struct ref *ref;
627 int n = 0;
628 char *head;
629 int summary_width = transport_summary_width(refs);
630
631 if (transport_color_config() < 0)
632 warning(_("could not parse transport.color.* config"));
633
634 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
635
636 if (verbose) {
637 for (ref = refs; ref; ref = ref->next)
638 if (ref->status == REF_STATUS_UPTODATE)
639 n += print_one_push_status(ref, dest, n,
640 porcelain, summary_width);
641 }
642
643 for (ref = refs; ref; ref = ref->next)
644 if (ref->status == REF_STATUS_OK)
645 n += print_one_push_status(ref, dest, n,
646 porcelain, summary_width);
647
648 *reject_reasons = 0;
649 for (ref = refs; ref; ref = ref->next) {
650 if (ref->status != REF_STATUS_NONE &&
651 ref->status != REF_STATUS_UPTODATE &&
652 ref->status != REF_STATUS_OK)
653 n += print_one_push_status(ref, dest, n,
654 porcelain, summary_width);
655 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
656 if (head != NULL && !strcmp(head, ref->name))
657 *reject_reasons |= REJECT_NON_FF_HEAD;
658 else
659 *reject_reasons |= REJECT_NON_FF_OTHER;
660 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
661 *reject_reasons |= REJECT_ALREADY_EXISTS;
662 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
663 *reject_reasons |= REJECT_FETCH_FIRST;
664 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
665 *reject_reasons |= REJECT_NEEDS_FORCE;
666 }
667 }
668 free(head);
669 }
670
671 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
672 {
673 struct git_transport_data *data = transport->data;
674 struct send_pack_args args;
675 int ret = 0;
676
677 if (transport_color_config() < 0)
678 return -1;
679
680 if (!data->got_remote_heads)
681 get_refs_via_connect(transport, 1, NULL);
682
683 memset(&args, 0, sizeof(args));
684 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
685 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
686 args.use_thin_pack = data->options.thin;
687 args.verbose = (transport->verbose > 0);
688 args.quiet = (transport->verbose < 0);
689 args.progress = transport->progress;
690 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
691 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
692 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
693 args.push_options = transport->push_options;
694 args.url = transport->url;
695
696 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
697 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
698 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
699 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
700 else
701 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
702
703 switch (data->version) {
704 case protocol_v2:
705 die(_("support for protocol v2 not implemented yet"));
706 break;
707 case protocol_v1:
708 case protocol_v0:
709 ret = send_pack(&args, data->fd, data->conn, remote_refs,
710 &data->extra_have);
711 break;
712 case protocol_unknown_version:
713 BUG("unknown protocol version");
714 }
715
716 close(data->fd[1]);
717 close(data->fd[0]);
718 ret |= finish_connect(data->conn);
719 data->conn = NULL;
720 data->got_remote_heads = 0;
721
722 return ret;
723 }
724
725 static int connect_git(struct transport *transport, const char *name,
726 const char *executable, int fd[2])
727 {
728 struct git_transport_data *data = transport->data;
729 data->conn = git_connect(data->fd, transport->url,
730 executable, 0);
731 fd[0] = data->fd[0];
732 fd[1] = data->fd[1];
733 return 0;
734 }
735
736 static int disconnect_git(struct transport *transport)
737 {
738 struct git_transport_data *data = transport->data;
739 if (data->conn) {
740 if (data->got_remote_heads && !transport->stateless_rpc)
741 packet_flush(data->fd[1]);
742 close(data->fd[0]);
743 close(data->fd[1]);
744 finish_connect(data->conn);
745 }
746
747 free(data);
748 return 0;
749 }
750
751 static struct transport_vtable taken_over_vtable = {
752 NULL,
753 get_refs_via_connect,
754 fetch_refs_via_pack,
755 git_transport_push,
756 NULL,
757 disconnect_git
758 };
759
760 void transport_take_over(struct transport *transport,
761 struct child_process *child)
762 {
763 struct git_transport_data *data;
764
765 if (!transport->smart_options)
766 BUG("taking over transport requires non-NULL "
767 "smart_options field.");
768
769 data = xcalloc(1, sizeof(*data));
770 data->options = *transport->smart_options;
771 data->conn = child;
772 data->fd[0] = data->conn->out;
773 data->fd[1] = data->conn->in;
774 data->got_remote_heads = 0;
775 transport->data = data;
776
777 transport->vtable = &taken_over_vtable;
778 transport->smart_options = &(data->options);
779
780 transport->cannot_reuse = 1;
781 }
782
783 static int is_file(const char *url)
784 {
785 struct stat buf;
786 if (stat(url, &buf))
787 return 0;
788 return S_ISREG(buf.st_mode);
789 }
790
791 static int external_specification_len(const char *url)
792 {
793 return strchr(url, ':') - url;
794 }
795
796 static const struct string_list *protocol_whitelist(void)
797 {
798 static int enabled = -1;
799 static struct string_list allowed = STRING_LIST_INIT_DUP;
800
801 if (enabled < 0) {
802 const char *v = getenv("GIT_ALLOW_PROTOCOL");
803 if (v) {
804 string_list_split(&allowed, v, ':', -1);
805 string_list_sort(&allowed);
806 enabled = 1;
807 } else {
808 enabled = 0;
809 }
810 }
811
812 return enabled ? &allowed : NULL;
813 }
814
815 enum protocol_allow_config {
816 PROTOCOL_ALLOW_NEVER = 0,
817 PROTOCOL_ALLOW_USER_ONLY,
818 PROTOCOL_ALLOW_ALWAYS
819 };
820
821 static enum protocol_allow_config parse_protocol_config(const char *key,
822 const char *value)
823 {
824 if (!strcasecmp(value, "always"))
825 return PROTOCOL_ALLOW_ALWAYS;
826 else if (!strcasecmp(value, "never"))
827 return PROTOCOL_ALLOW_NEVER;
828 else if (!strcasecmp(value, "user"))
829 return PROTOCOL_ALLOW_USER_ONLY;
830
831 die(_("unknown value for config '%s': %s"), key, value);
832 }
833
834 static enum protocol_allow_config get_protocol_config(const char *type)
835 {
836 char *key = xstrfmt("protocol.%s.allow", type);
837 char *value;
838
839 /* first check the per-protocol config */
840 if (!git_config_get_string(key, &value)) {
841 enum protocol_allow_config ret =
842 parse_protocol_config(key, value);
843 free(key);
844 free(value);
845 return ret;
846 }
847 free(key);
848
849 /* if defined, fallback to user-defined default for unknown protocols */
850 if (!git_config_get_string("protocol.allow", &value)) {
851 enum protocol_allow_config ret =
852 parse_protocol_config("protocol.allow", value);
853 free(value);
854 return ret;
855 }
856
857 /* fallback to built-in defaults */
858 /* known safe */
859 if (!strcmp(type, "http") ||
860 !strcmp(type, "https") ||
861 !strcmp(type, "git") ||
862 !strcmp(type, "ssh") ||
863 !strcmp(type, "file"))
864 return PROTOCOL_ALLOW_ALWAYS;
865
866 /* known scary; err on the side of caution */
867 if (!strcmp(type, "ext"))
868 return PROTOCOL_ALLOW_NEVER;
869
870 /* unknown; by default let them be used only directly by the user */
871 return PROTOCOL_ALLOW_USER_ONLY;
872 }
873
874 int is_transport_allowed(const char *type, int from_user)
875 {
876 const struct string_list *whitelist = protocol_whitelist();
877 if (whitelist)
878 return string_list_has_string(whitelist, type);
879
880 switch (get_protocol_config(type)) {
881 case PROTOCOL_ALLOW_ALWAYS:
882 return 1;
883 case PROTOCOL_ALLOW_NEVER:
884 return 0;
885 case PROTOCOL_ALLOW_USER_ONLY:
886 if (from_user < 0)
887 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
888 return from_user;
889 }
890
891 BUG("invalid protocol_allow_config type");
892 }
893
894 void transport_check_allowed(const char *type)
895 {
896 if (!is_transport_allowed(type, -1))
897 die(_("transport '%s' not allowed"), type);
898 }
899
900 static struct transport_vtable bundle_vtable = {
901 NULL,
902 get_refs_from_bundle,
903 fetch_refs_from_bundle,
904 NULL,
905 NULL,
906 close_bundle
907 };
908
909 static struct transport_vtable builtin_smart_vtable = {
910 NULL,
911 get_refs_via_connect,
912 fetch_refs_via_pack,
913 git_transport_push,
914 connect_git,
915 disconnect_git
916 };
917
918 struct transport *transport_get(struct remote *remote, const char *url)
919 {
920 const char *helper;
921 struct transport *ret = xcalloc(1, sizeof(*ret));
922
923 ret->progress = isatty(2);
924
925 if (!remote)
926 BUG("No remote provided to transport_get()");
927
928 ret->got_remote_refs = 0;
929 ret->remote = remote;
930 helper = remote->foreign_vcs;
931
932 if (!url && remote->url)
933 url = remote->url[0];
934 ret->url = url;
935
936 /* maybe it is a foreign URL? */
937 if (url) {
938 const char *p = url;
939
940 while (is_urlschemechar(p == url, *p))
941 p++;
942 if (starts_with(p, "::"))
943 helper = xstrndup(url, p - url);
944 }
945
946 if (helper) {
947 transport_helper_init(ret, helper);
948 } else if (starts_with(url, "rsync:")) {
949 die(_("git-over-rsync is no longer supported"));
950 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
951 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
952 transport_check_allowed("file");
953 ret->data = data;
954 ret->vtable = &bundle_vtable;
955 ret->smart_options = NULL;
956 } else if (!is_url(url)
957 || starts_with(url, "file://")
958 || starts_with(url, "git://")
959 || starts_with(url, "ssh://")
960 || starts_with(url, "git+ssh://") /* deprecated - do not use */
961 || starts_with(url, "ssh+git://") /* deprecated - do not use */
962 ) {
963 /*
964 * These are builtin smart transports; "allowed" transports
965 * will be checked individually in git_connect.
966 */
967 struct git_transport_data *data = xcalloc(1, sizeof(*data));
968 ret->data = data;
969 ret->vtable = &builtin_smart_vtable;
970 ret->smart_options = &(data->options);
971
972 data->conn = NULL;
973 data->got_remote_heads = 0;
974 } else {
975 /* Unknown protocol in URL. Pass to external handler. */
976 int len = external_specification_len(url);
977 char *handler = xmemdupz(url, len);
978 transport_helper_init(ret, handler);
979 }
980
981 if (ret->smart_options) {
982 ret->smart_options->thin = 1;
983 ret->smart_options->uploadpack = "git-upload-pack";
984 if (remote->uploadpack)
985 ret->smart_options->uploadpack = remote->uploadpack;
986 ret->smart_options->receivepack = "git-receive-pack";
987 if (remote->receivepack)
988 ret->smart_options->receivepack = remote->receivepack;
989 }
990
991 return ret;
992 }
993
994 int transport_set_option(struct transport *transport,
995 const char *name, const char *value)
996 {
997 int git_reports = 1, protocol_reports = 1;
998
999 if (transport->smart_options)
1000 git_reports = set_git_option(transport->smart_options,
1001 name, value);
1002
1003 if (transport->vtable->set_option)
1004 protocol_reports = transport->vtable->set_option(transport,
1005 name, value);
1006
1007 /* If either report is 0, report 0 (success). */
1008 if (!git_reports || !protocol_reports)
1009 return 0;
1010 /* If either reports -1 (invalid value), report -1. */
1011 if ((git_reports == -1) || (protocol_reports == -1))
1012 return -1;
1013 /* Otherwise if both report unknown, report unknown. */
1014 return 1;
1015 }
1016
1017 void transport_set_verbosity(struct transport *transport, int verbosity,
1018 int force_progress)
1019 {
1020 if (verbosity >= 1)
1021 transport->verbose = verbosity <= 3 ? verbosity : 3;
1022 if (verbosity < 0)
1023 transport->verbose = -1;
1024
1025 /**
1026 * Rules used to determine whether to report progress (processing aborts
1027 * when a rule is satisfied):
1028 *
1029 * . Report progress, if force_progress is 1 (ie. --progress).
1030 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1031 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1032 * . Report progress if isatty(2) is 1.
1033 **/
1034 if (force_progress >= 0)
1035 transport->progress = !!force_progress;
1036 else
1037 transport->progress = verbosity >= 0 && isatty(2);
1038 }
1039
1040 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1041 {
1042 int i;
1043
1044 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1045 "not be found on any remote:\n"));
1046 for (i = 0; i < needs_pushing->nr; i++)
1047 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1048 fprintf(stderr, _("\nPlease try\n\n"
1049 " git push --recurse-submodules=on-demand\n\n"
1050 "or cd to the path and use\n\n"
1051 " git push\n\n"
1052 "to push them to a remote.\n\n"));
1053
1054 string_list_clear(needs_pushing, 0);
1055
1056 die(_("Aborting."));
1057 }
1058
1059 static int run_pre_push_hook(struct transport *transport,
1060 struct ref *remote_refs)
1061 {
1062 int ret = 0, x;
1063 struct ref *r;
1064 struct child_process proc = CHILD_PROCESS_INIT;
1065 struct strbuf buf;
1066 const char *argv[4];
1067
1068 if (!(argv[0] = find_hook("pre-push")))
1069 return 0;
1070
1071 argv[1] = transport->remote->name;
1072 argv[2] = transport->url;
1073 argv[3] = NULL;
1074
1075 proc.argv = argv;
1076 proc.in = -1;
1077 proc.trace2_hook_name = "pre-push";
1078
1079 if (start_command(&proc)) {
1080 finish_command(&proc);
1081 return -1;
1082 }
1083
1084 sigchain_push(SIGPIPE, SIG_IGN);
1085
1086 strbuf_init(&buf, 256);
1087
1088 for (r = remote_refs; r; r = r->next) {
1089 if (!r->peer_ref) continue;
1090 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1091 if (r->status == REF_STATUS_REJECT_STALE) continue;
1092 if (r->status == REF_STATUS_UPTODATE) continue;
1093
1094 strbuf_reset(&buf);
1095 strbuf_addf( &buf, "%s %s %s %s\n",
1096 r->peer_ref->name, oid_to_hex(&r->new_oid),
1097 r->name, oid_to_hex(&r->old_oid));
1098
1099 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1100 /* We do not mind if a hook does not read all refs. */
1101 if (errno != EPIPE)
1102 ret = -1;
1103 break;
1104 }
1105 }
1106
1107 strbuf_release(&buf);
1108
1109 x = close(proc.in);
1110 if (!ret)
1111 ret = x;
1112
1113 sigchain_pop(SIGPIPE);
1114
1115 x = finish_command(&proc);
1116 if (!ret)
1117 ret = x;
1118
1119 return ret;
1120 }
1121
1122 int transport_push(struct repository *r,
1123 struct transport *transport,
1124 struct refspec *rs, int flags,
1125 unsigned int *reject_reasons)
1126 {
1127 *reject_reasons = 0;
1128
1129 if (transport_color_config() < 0)
1130 return -1;
1131
1132 if (transport->vtable->push_refs) {
1133 struct ref *remote_refs;
1134 struct ref *local_refs = get_local_heads();
1135 int match_flags = MATCH_REFS_NONE;
1136 int verbose = (transport->verbose > 0);
1137 int quiet = (transport->verbose < 0);
1138 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1139 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1140 int push_ret, ret, err;
1141 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1142
1143 if (check_push_refs(local_refs, rs) < 0)
1144 return -1;
1145
1146 refspec_ref_prefixes(rs, &ref_prefixes);
1147
1148 trace2_region_enter("transport_push", "get_refs_list", r);
1149 remote_refs = transport->vtable->get_refs_list(transport, 1,
1150 &ref_prefixes);
1151 trace2_region_leave("transport_push", "get_refs_list", r);
1152
1153 argv_array_clear(&ref_prefixes);
1154
1155 if (flags & TRANSPORT_PUSH_ALL)
1156 match_flags |= MATCH_REFS_ALL;
1157 if (flags & TRANSPORT_PUSH_MIRROR)
1158 match_flags |= MATCH_REFS_MIRROR;
1159 if (flags & TRANSPORT_PUSH_PRUNE)
1160 match_flags |= MATCH_REFS_PRUNE;
1161 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1162 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1163
1164 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1165 return -1;
1166
1167 if (transport->smart_options &&
1168 transport->smart_options->cas &&
1169 !is_empty_cas(transport->smart_options->cas))
1170 apply_push_cas(transport->smart_options->cas,
1171 transport->remote, remote_refs);
1172
1173 set_ref_status_for_push(remote_refs,
1174 flags & TRANSPORT_PUSH_MIRROR,
1175 flags & TRANSPORT_PUSH_FORCE);
1176
1177 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1178 if (run_pre_push_hook(transport, remote_refs))
1179 return -1;
1180
1181 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1182 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1183 !is_bare_repository()) {
1184 struct ref *ref = remote_refs;
1185 struct oid_array commits = OID_ARRAY_INIT;
1186
1187 trace2_region_enter("transport_push", "push_submodules", r);
1188 for (; ref; ref = ref->next)
1189 if (!is_null_oid(&ref->new_oid))
1190 oid_array_append(&commits,
1191 &ref->new_oid);
1192
1193 if (!push_unpushed_submodules(r,
1194 &commits,
1195 transport->remote,
1196 rs,
1197 transport->push_options,
1198 pretend)) {
1199 oid_array_clear(&commits);
1200 trace2_region_leave("transport_push", "push_submodules", r);
1201 die(_("failed to push all needed submodules"));
1202 }
1203 oid_array_clear(&commits);
1204 trace2_region_leave("transport_push", "push_submodules", r);
1205 }
1206
1207 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1208 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1209 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1210 !pretend)) && !is_bare_repository()) {
1211 struct ref *ref = remote_refs;
1212 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1213 struct oid_array commits = OID_ARRAY_INIT;
1214
1215 trace2_region_enter("transport_push", "check_submodules", r);
1216 for (; ref; ref = ref->next)
1217 if (!is_null_oid(&ref->new_oid))
1218 oid_array_append(&commits,
1219 &ref->new_oid);
1220
1221 if (find_unpushed_submodules(r,
1222 &commits,
1223 transport->remote->name,
1224 &needs_pushing)) {
1225 oid_array_clear(&commits);
1226 trace2_region_leave("transport_push", "check_submodules", r);
1227 die_with_unpushed_submodules(&needs_pushing);
1228 }
1229 string_list_clear(&needs_pushing, 0);
1230 oid_array_clear(&commits);
1231 trace2_region_leave("transport_push", "check_submodules", r);
1232 }
1233
1234 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1235 trace2_region_enter("transport_push", "push_refs", r);
1236 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1237 trace2_region_leave("transport_push", "push_refs", r);
1238 } else
1239 push_ret = 0;
1240 err = push_had_errors(remote_refs);
1241 ret = push_ret | err;
1242
1243 if ((flags & TRANSPORT_PUSH_ATOMIC) && err) {
1244 struct ref *it;
1245 for (it = remote_refs; it; it = it->next)
1246 switch (it->status) {
1247 case REF_STATUS_NONE:
1248 case REF_STATUS_UPTODATE:
1249 case REF_STATUS_OK:
1250 it->status = REF_STATUS_ATOMIC_PUSH_FAILED;
1251 break;
1252 default:
1253 break;
1254 }
1255 }
1256
1257 if (!quiet || err)
1258 transport_print_push_status(transport->url, remote_refs,
1259 verbose | porcelain, porcelain,
1260 reject_reasons);
1261
1262 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1263 set_upstreams(transport, remote_refs, pretend);
1264
1265 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1266 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1267 struct ref *ref;
1268 for (ref = remote_refs; ref; ref = ref->next)
1269 transport_update_tracking_ref(transport->remote, ref, verbose);
1270 }
1271
1272 if (porcelain && !push_ret)
1273 puts("Done");
1274 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1275 fprintf(stderr, "Everything up-to-date\n");
1276
1277 return ret;
1278 }
1279 return 1;
1280 }
1281
1282 const struct ref *transport_get_remote_refs(struct transport *transport,
1283 const struct argv_array *ref_prefixes)
1284 {
1285 if (!transport->got_remote_refs) {
1286 transport->remote_refs =
1287 transport->vtable->get_refs_list(transport, 0,
1288 ref_prefixes);
1289 transport->got_remote_refs = 1;
1290 }
1291
1292 return transport->remote_refs;
1293 }
1294
1295 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1296 {
1297 int rc;
1298 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1299 struct ref **heads = NULL;
1300 struct ref *rm;
1301
1302 for (rm = refs; rm; rm = rm->next) {
1303 nr_refs++;
1304 if (rm->peer_ref &&
1305 !is_null_oid(&rm->old_oid) &&
1306 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1307 continue;
1308 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1309 heads[nr_heads++] = rm;
1310 }
1311
1312 if (!nr_heads) {
1313 /*
1314 * When deepening of a shallow repository is requested,
1315 * then local and remote refs are likely to still be equal.
1316 * Just feed them all to the fetch method in that case.
1317 * This condition shouldn't be met in a non-deepening fetch
1318 * (see builtin/fetch.c:quickfetch()).
1319 */
1320 ALLOC_ARRAY(heads, nr_refs);
1321 for (rm = refs; rm; rm = rm->next)
1322 heads[nr_heads++] = rm;
1323 }
1324
1325 rc = transport->vtable->fetch(transport, nr_heads, heads);
1326
1327 free(heads);
1328 return rc;
1329 }
1330
1331 void transport_unlock_pack(struct transport *transport)
1332 {
1333 if (transport->pack_lockfile) {
1334 unlink_or_warn(transport->pack_lockfile);
1335 FREE_AND_NULL(transport->pack_lockfile);
1336 }
1337 }
1338
1339 int transport_connect(struct transport *transport, const char *name,
1340 const char *exec, int fd[2])
1341 {
1342 if (transport->vtable->connect)
1343 return transport->vtable->connect(transport, name, exec, fd);
1344 else
1345 die(_("operation not supported by protocol"));
1346 }
1347
1348 int transport_disconnect(struct transport *transport)
1349 {
1350 int ret = 0;
1351 if (transport->vtable->disconnect)
1352 ret = transport->vtable->disconnect(transport);
1353 free(transport);
1354 return ret;
1355 }
1356
1357 /*
1358 * Strip username (and password) from a URL and return
1359 * it in a newly allocated string.
1360 */
1361 char *transport_anonymize_url(const char *url)
1362 {
1363 char *scheme_prefix, *anon_part;
1364 size_t anon_len, prefix_len = 0;
1365
1366 anon_part = strchr(url, '@');
1367 if (url_is_local_not_ssh(url) || !anon_part)
1368 goto literal_copy;
1369
1370 anon_len = strlen(++anon_part);
1371 scheme_prefix = strstr(url, "://");
1372 if (!scheme_prefix) {
1373 if (!strchr(anon_part, ':'))
1374 /* cannot be "me@there:/path/name" */
1375 goto literal_copy;
1376 } else {
1377 const char *cp;
1378 /* make sure scheme is reasonable */
1379 for (cp = url; cp < scheme_prefix; cp++) {
1380 switch (*cp) {
1381 /* RFC 1738 2.1 */
1382 case '+': case '.': case '-':
1383 break; /* ok */
1384 default:
1385 if (isalnum(*cp))
1386 break;
1387 /* it isn't */
1388 goto literal_copy;
1389 }
1390 }
1391 /* @ past the first slash does not count */
1392 cp = strchr(scheme_prefix + 3, '/');
1393 if (cp && cp < anon_part)
1394 goto literal_copy;
1395 prefix_len = scheme_prefix - url + 3;
1396 }
1397 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1398 (int)anon_len, anon_part);
1399 literal_copy:
1400 return xstrdup(url);
1401 }
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