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git-cvsexportcommit: port to SHA-256
[git/raj.git] / transport.c
blob38a432be69d0367679f0321a19c64372e59170c8
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 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
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_NO_DEPENDENTS)) {
236 opts->no_dependents = !!value;
237 return 0;
238 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
239 list_objects_filter_die_if_populated(&opts->filter_options);
240 parse_list_objects_filter(&opts->filter_options, value);
241 return 0;
242 }
243 return 1;
244 }
245
246 static int connect_setup(struct transport *transport, int for_push)
247 {
248 struct git_transport_data *data = transport->data;
249 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
250
251 if (data->conn)
252 return 0;
253
254 switch (transport->family) {
255 case TRANSPORT_FAMILY_ALL: break;
256 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
257 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
258 }
259
260 data->conn = git_connect(data->fd, transport->url,
261 for_push ? data->options.receivepack :
262 data->options.uploadpack,
263 flags);
264
265 return 0;
266 }
267
268 static void die_if_server_options(struct transport *transport)
269 {
270 if (!transport->server_options || !transport->server_options->nr)
271 return;
272 advise(_("see protocol.version in 'git help config' for more details"));
273 die(_("server options require protocol version 2 or later"));
274 }
275
276 /*
277 * Obtains the protocol version from the transport and writes it to
278 * transport->data->version, first connecting if not already connected.
279 *
280 * If the protocol version is one that allows skipping the listing of remote
281 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
282 * this function returns NULL. Otherwise, this function returns the list of
283 * remote refs.
284 */
285 static struct ref *handshake(struct transport *transport, int for_push,
286 const struct argv_array *ref_prefixes,
287 int must_list_refs)
288 {
289 struct git_transport_data *data = transport->data;
290 struct ref *refs = NULL;
291 struct packet_reader reader;
292
293 connect_setup(transport, for_push);
294
295 packet_reader_init(&reader, data->fd[0], NULL, 0,
296 PACKET_READ_CHOMP_NEWLINE |
297 PACKET_READ_GENTLE_ON_EOF |
298 PACKET_READ_DIE_ON_ERR_PACKET);
299
300 data->version = discover_version(&reader);
301 switch (data->version) {
302 case protocol_v2:
303 if (must_list_refs)
304 get_remote_refs(data->fd[1], &reader, &refs, for_push,
305 ref_prefixes,
306 transport->server_options);
307 break;
308 case protocol_v1:
309 case protocol_v0:
310 die_if_server_options(transport);
311 get_remote_heads(&reader, &refs,
312 for_push ? REF_NORMAL : 0,
313 &data->extra_have,
314 &data->shallow);
315 break;
316 case protocol_unknown_version:
317 BUG("unknown protocol version");
318 }
319 data->got_remote_heads = 1;
320 transport->hash_algo = reader.hash_algo;
321
322 if (reader.line_peeked)
323 BUG("buffer must be empty at the end of handshake()");
324
325 return refs;
326 }
327
328 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
329 const struct argv_array *ref_prefixes)
330 {
331 return handshake(transport, for_push, ref_prefixes, 1);
332 }
333
334 static int fetch_refs_via_pack(struct transport *transport,
335 int nr_heads, struct ref **to_fetch)
336 {
337 int ret = 0;
338 struct git_transport_data *data = transport->data;
339 struct ref *refs = NULL;
340 struct fetch_pack_args args;
341 struct ref *refs_tmp = NULL;
342
343 memset(&args, 0, sizeof(args));
344 args.uploadpack = data->options.uploadpack;
345 args.keep_pack = data->options.keep;
346 args.lock_pack = 1;
347 args.use_thin_pack = data->options.thin;
348 args.include_tag = data->options.followtags;
349 args.verbose = (transport->verbose > 1);
350 args.quiet = (transport->verbose < 0);
351 args.no_progress = !transport->progress;
352 args.depth = data->options.depth;
353 args.deepen_since = data->options.deepen_since;
354 args.deepen_not = data->options.deepen_not;
355 args.deepen_relative = data->options.deepen_relative;
356 args.check_self_contained_and_connected =
357 data->options.check_self_contained_and_connected;
358 args.cloning = transport->cloning;
359 args.update_shallow = data->options.update_shallow;
360 args.from_promisor = data->options.from_promisor;
361 args.no_dependents = data->options.no_dependents;
362 args.filter_options = data->options.filter_options;
363 args.stateless_rpc = transport->stateless_rpc;
364 args.server_options = transport->server_options;
365 args.negotiation_tips = data->options.negotiation_tips;
366
367 if (!data->got_remote_heads) {
368 int i;
369 int must_list_refs = 0;
370 for (i = 0; i < nr_heads; i++) {
371 if (!to_fetch[i]->exact_oid) {
372 must_list_refs = 1;
373 break;
374 }
375 }
376 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
377 }
378
379 switch (data->version) {
380 case protocol_v2:
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_lockfile, data->version);
385 break;
386 case protocol_v1:
387 case protocol_v0:
388 die_if_server_options(transport);
389 refs = fetch_pack(&args, data->fd,
390 refs_tmp ? refs_tmp : transport->remote_refs,
391 to_fetch, nr_heads, &data->shallow,
392 &transport->pack_lockfile, data->version);
393 break;
394 case protocol_unknown_version:
395 BUG("unknown protocol version");
396 }
397
398 close(data->fd[0]);
399 close(data->fd[1]);
400 if (finish_connect(data->conn))
401 ret = -1;
402 data->conn = NULL;
403 data->got_remote_heads = 0;
404 data->options.self_contained_and_connected =
405 args.self_contained_and_connected;
406 data->options.connectivity_checked = args.connectivity_checked;
407
408 if (refs == NULL)
409 ret = -1;
410 if (report_unmatched_refs(to_fetch, nr_heads))
411 ret = -1;
412
413 free_refs(refs_tmp);
414 free_refs(refs);
415 return ret;
416 }
417
418 static int push_had_errors(struct ref *ref)
419 {
420 for (; ref; ref = ref->next) {
421 switch (ref->status) {
422 case REF_STATUS_NONE:
423 case REF_STATUS_UPTODATE:
424 case REF_STATUS_OK:
425 break;
426 default:
427 return 1;
428 }
429 }
430 return 0;
431 }
432
433 int transport_refs_pushed(struct ref *ref)
434 {
435 for (; ref; ref = ref->next) {
436 switch(ref->status) {
437 case REF_STATUS_NONE:
438 case REF_STATUS_UPTODATE:
439 break;
440 default:
441 return 1;
442 }
443 }
444 return 0;
445 }
446
447 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
448 {
449 struct refspec_item rs;
450
451 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
452 return;
453
454 rs.src = ref->name;
455 rs.dst = NULL;
456
457 if (!remote_find_tracking(remote, &rs)) {
458 if (verbose)
459 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
460 if (ref->deletion) {
461 delete_ref(NULL, rs.dst, NULL, 0);
462 } else
463 update_ref("update by push", rs.dst, &ref->new_oid,
464 NULL, 0, 0);
465 free(rs.dst);
466 }
467 }
468
469 static void print_ref_status(char flag, const char *summary,
470 struct ref *to, struct ref *from, const char *msg,
471 int porcelain, int summary_width)
472 {
473 if (porcelain) {
474 if (from)
475 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
476 else
477 fprintf(stdout, "%c\t:%s\t", flag, to->name);
478 if (msg)
479 fprintf(stdout, "%s (%s)\n", summary, msg);
480 else
481 fprintf(stdout, "%s\n", summary);
482 } else {
483 const char *red = "", *reset = "";
484 if (push_had_errors(to)) {
485 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
486 reset = transport_get_color(TRANSPORT_COLOR_RESET);
487 }
488 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
489 summary, reset);
490 if (from)
491 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
492 else
493 fputs(prettify_refname(to->name), stderr);
494 if (msg) {
495 fputs(" (", stderr);
496 fputs(msg, stderr);
497 fputc(')', stderr);
498 }
499 fputc('\n', stderr);
500 }
501 }
502
503 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
504 {
505 if (ref->deletion)
506 print_ref_status('-', "[deleted]", ref, NULL, NULL,
507 porcelain, summary_width);
508 else if (is_null_oid(&ref->old_oid))
509 print_ref_status('*',
510 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
511 "[new branch]"),
512 ref, ref->peer_ref, NULL, porcelain, summary_width);
513 else {
514 struct strbuf quickref = STRBUF_INIT;
515 char type;
516 const char *msg;
517
518 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
519 DEFAULT_ABBREV);
520 if (ref->forced_update) {
521 strbuf_addstr(&quickref, "...");
522 type = '+';
523 msg = "forced update";
524 } else {
525 strbuf_addstr(&quickref, "..");
526 type = ' ';
527 msg = NULL;
528 }
529 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
530 DEFAULT_ABBREV);
531
532 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
533 porcelain, summary_width);
534 strbuf_release(&quickref);
535 }
536 }
537
538 static int print_one_push_status(struct ref *ref, const char *dest, int count,
539 int porcelain, int summary_width)
540 {
541 if (!count) {
542 char *url = transport_anonymize_url(dest);
543 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
544 free(url);
545 }
546
547 switch(ref->status) {
548 case REF_STATUS_NONE:
549 print_ref_status('X', "[no match]", ref, NULL, NULL,
550 porcelain, summary_width);
551 break;
552 case REF_STATUS_REJECT_NODELETE:
553 print_ref_status('!', "[rejected]", ref, NULL,
554 "remote does not support deleting refs",
555 porcelain, summary_width);
556 break;
557 case REF_STATUS_UPTODATE:
558 print_ref_status('=', "[up to date]", ref,
559 ref->peer_ref, NULL, porcelain, summary_width);
560 break;
561 case REF_STATUS_REJECT_NONFASTFORWARD:
562 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
563 "non-fast-forward", porcelain, summary_width);
564 break;
565 case REF_STATUS_REJECT_ALREADY_EXISTS:
566 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
567 "already exists", porcelain, summary_width);
568 break;
569 case REF_STATUS_REJECT_FETCH_FIRST:
570 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
571 "fetch first", porcelain, summary_width);
572 break;
573 case REF_STATUS_REJECT_NEEDS_FORCE:
574 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
575 "needs force", porcelain, summary_width);
576 break;
577 case REF_STATUS_REJECT_STALE:
578 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
579 "stale info", porcelain, summary_width);
580 break;
581 case REF_STATUS_REJECT_SHALLOW:
582 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
583 "new shallow roots not allowed",
584 porcelain, summary_width);
585 break;
586 case REF_STATUS_REMOTE_REJECT:
587 print_ref_status('!', "[remote rejected]", ref,
588 ref->deletion ? NULL : ref->peer_ref,
589 ref->remote_status, porcelain, summary_width);
590 break;
591 case REF_STATUS_EXPECTING_REPORT:
592 print_ref_status('!', "[remote failure]", ref,
593 ref->deletion ? NULL : ref->peer_ref,
594 "remote failed to report status",
595 porcelain, summary_width);
596 break;
597 case REF_STATUS_ATOMIC_PUSH_FAILED:
598 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
599 "atomic push failed", porcelain, summary_width);
600 break;
601 case REF_STATUS_OK:
602 print_ok_ref_status(ref, porcelain, summary_width);
603 break;
604 }
605
606 return 1;
607 }
608
609 static int measure_abbrev(const struct object_id *oid, int sofar)
610 {
611 char hex[GIT_MAX_HEXSZ + 1];
612 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
613
614 return (w < sofar) ? sofar : w;
615 }
616
617 int transport_summary_width(const struct ref *refs)
618 {
619 int maxw = -1;
620
621 for (; refs; refs = refs->next) {
622 maxw = measure_abbrev(&refs->old_oid, maxw);
623 maxw = measure_abbrev(&refs->new_oid, maxw);
624 }
625 if (maxw < 0)
626 maxw = FALLBACK_DEFAULT_ABBREV;
627 return (2 * maxw + 3);
628 }
629
630 void transport_print_push_status(const char *dest, struct ref *refs,
631 int verbose, int porcelain, unsigned int *reject_reasons)
632 {
633 struct ref *ref;
634 int n = 0;
635 char *head;
636 int summary_width = transport_summary_width(refs);
637
638 if (transport_color_config() < 0)
639 warning(_("could not parse transport.color.* config"));
640
641 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
642
643 if (verbose) {
644 for (ref = refs; ref; ref = ref->next)
645 if (ref->status == REF_STATUS_UPTODATE)
646 n += print_one_push_status(ref, dest, n,
647 porcelain, summary_width);
648 }
649
650 for (ref = refs; ref; ref = ref->next)
651 if (ref->status == REF_STATUS_OK)
652 n += print_one_push_status(ref, dest, n,
653 porcelain, summary_width);
654
655 *reject_reasons = 0;
656 for (ref = refs; ref; ref = ref->next) {
657 if (ref->status != REF_STATUS_NONE &&
658 ref->status != REF_STATUS_UPTODATE &&
659 ref->status != REF_STATUS_OK)
660 n += print_one_push_status(ref, dest, n,
661 porcelain, summary_width);
662 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
663 if (head != NULL && !strcmp(head, ref->name))
664 *reject_reasons |= REJECT_NON_FF_HEAD;
665 else
666 *reject_reasons |= REJECT_NON_FF_OTHER;
667 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
668 *reject_reasons |= REJECT_ALREADY_EXISTS;
669 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
670 *reject_reasons |= REJECT_FETCH_FIRST;
671 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
672 *reject_reasons |= REJECT_NEEDS_FORCE;
673 }
674 }
675 free(head);
676 }
677
678 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
679 {
680 struct git_transport_data *data = transport->data;
681 struct send_pack_args args;
682 int ret = 0;
683
684 if (transport_color_config() < 0)
685 return -1;
686
687 if (!data->got_remote_heads)
688 get_refs_via_connect(transport, 1, NULL);
689
690 memset(&args, 0, sizeof(args));
691 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
692 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
693 args.use_thin_pack = data->options.thin;
694 args.verbose = (transport->verbose > 0);
695 args.quiet = (transport->verbose < 0);
696 args.progress = transport->progress;
697 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
698 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
699 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
700 args.push_options = transport->push_options;
701 args.url = transport->url;
702
703 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
704 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
705 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
706 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
707 else
708 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
709
710 switch (data->version) {
711 case protocol_v2:
712 die(_("support for protocol v2 not implemented yet"));
713 break;
714 case protocol_v1:
715 case protocol_v0:
716 ret = send_pack(&args, data->fd, data->conn, remote_refs,
717 &data->extra_have);
718 break;
719 case protocol_unknown_version:
720 BUG("unknown protocol version");
721 }
722
723 close(data->fd[1]);
724 close(data->fd[0]);
725 /*
726 * Atomic push may abort the connection early and close the pipe,
727 * which may cause an error for `finish_connect()`. Ignore this error
728 * for atomic git-push.
729 */
730 if (ret || args.atomic)
731 finish_connect(data->conn);
732 else
733 ret = finish_connect(data->conn);
734 data->conn = NULL;
735 data->got_remote_heads = 0;
736
737 return ret;
738 }
739
740 static int connect_git(struct transport *transport, const char *name,
741 const char *executable, int fd[2])
742 {
743 struct git_transport_data *data = transport->data;
744 data->conn = git_connect(data->fd, transport->url,
745 executable, 0);
746 fd[0] = data->fd[0];
747 fd[1] = data->fd[1];
748 return 0;
749 }
750
751 static int disconnect_git(struct transport *transport)
752 {
753 struct git_transport_data *data = transport->data;
754 if (data->conn) {
755 if (data->got_remote_heads && !transport->stateless_rpc)
756 packet_flush(data->fd[1]);
757 close(data->fd[0]);
758 close(data->fd[1]);
759 finish_connect(data->conn);
760 }
761
762 free(data);
763 return 0;
764 }
765
766 static struct transport_vtable taken_over_vtable = {
767 NULL,
768 get_refs_via_connect,
769 fetch_refs_via_pack,
770 git_transport_push,
771 NULL,
772 disconnect_git
773 };
774
775 void transport_take_over(struct transport *transport,
776 struct child_process *child)
777 {
778 struct git_transport_data *data;
779
780 if (!transport->smart_options)
781 BUG("taking over transport requires non-NULL "
782 "smart_options field.");
783
784 data = xcalloc(1, sizeof(*data));
785 data->options = *transport->smart_options;
786 data->conn = child;
787 data->fd[0] = data->conn->out;
788 data->fd[1] = data->conn->in;
789 data->got_remote_heads = 0;
790 transport->data = data;
791
792 transport->vtable = &taken_over_vtable;
793 transport->smart_options = &(data->options);
794
795 transport->cannot_reuse = 1;
796 }
797
798 static int is_file(const char *url)
799 {
800 struct stat buf;
801 if (stat(url, &buf))
802 return 0;
803 return S_ISREG(buf.st_mode);
804 }
805
806 static int external_specification_len(const char *url)
807 {
808 return strchr(url, ':') - url;
809 }
810
811 static const struct string_list *protocol_whitelist(void)
812 {
813 static int enabled = -1;
814 static struct string_list allowed = STRING_LIST_INIT_DUP;
815
816 if (enabled < 0) {
817 const char *v = getenv("GIT_ALLOW_PROTOCOL");
818 if (v) {
819 string_list_split(&allowed, v, ':', -1);
820 string_list_sort(&allowed);
821 enabled = 1;
822 } else {
823 enabled = 0;
824 }
825 }
826
827 return enabled ? &allowed : NULL;
828 }
829
830 enum protocol_allow_config {
831 PROTOCOL_ALLOW_NEVER = 0,
832 PROTOCOL_ALLOW_USER_ONLY,
833 PROTOCOL_ALLOW_ALWAYS
834 };
835
836 static enum protocol_allow_config parse_protocol_config(const char *key,
837 const char *value)
838 {
839 if (!strcasecmp(value, "always"))
840 return PROTOCOL_ALLOW_ALWAYS;
841 else if (!strcasecmp(value, "never"))
842 return PROTOCOL_ALLOW_NEVER;
843 else if (!strcasecmp(value, "user"))
844 return PROTOCOL_ALLOW_USER_ONLY;
845
846 die(_("unknown value for config '%s': %s"), key, value);
847 }
848
849 static enum protocol_allow_config get_protocol_config(const char *type)
850 {
851 char *key = xstrfmt("protocol.%s.allow", type);
852 char *value;
853
854 /* first check the per-protocol config */
855 if (!git_config_get_string(key, &value)) {
856 enum protocol_allow_config ret =
857 parse_protocol_config(key, value);
858 free(key);
859 free(value);
860 return ret;
861 }
862 free(key);
863
864 /* if defined, fallback to user-defined default for unknown protocols */
865 if (!git_config_get_string("protocol.allow", &value)) {
866 enum protocol_allow_config ret =
867 parse_protocol_config("protocol.allow", value);
868 free(value);
869 return ret;
870 }
871
872 /* fallback to built-in defaults */
873 /* known safe */
874 if (!strcmp(type, "http") ||
875 !strcmp(type, "https") ||
876 !strcmp(type, "git") ||
877 !strcmp(type, "ssh") ||
878 !strcmp(type, "file"))
879 return PROTOCOL_ALLOW_ALWAYS;
880
881 /* known scary; err on the side of caution */
882 if (!strcmp(type, "ext"))
883 return PROTOCOL_ALLOW_NEVER;
884
885 /* unknown; by default let them be used only directly by the user */
886 return PROTOCOL_ALLOW_USER_ONLY;
887 }
888
889 int is_transport_allowed(const char *type, int from_user)
890 {
891 const struct string_list *whitelist = protocol_whitelist();
892 if (whitelist)
893 return string_list_has_string(whitelist, type);
894
895 switch (get_protocol_config(type)) {
896 case PROTOCOL_ALLOW_ALWAYS:
897 return 1;
898 case PROTOCOL_ALLOW_NEVER:
899 return 0;
900 case PROTOCOL_ALLOW_USER_ONLY:
901 if (from_user < 0)
902 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
903 return from_user;
904 }
905
906 BUG("invalid protocol_allow_config type");
907 }
908
909 void transport_check_allowed(const char *type)
910 {
911 if (!is_transport_allowed(type, -1))
912 die(_("transport '%s' not allowed"), type);
913 }
914
915 static struct transport_vtable bundle_vtable = {
916 NULL,
917 get_refs_from_bundle,
918 fetch_refs_from_bundle,
919 NULL,
920 NULL,
921 close_bundle
922 };
923
924 static struct transport_vtable builtin_smart_vtable = {
925 NULL,
926 get_refs_via_connect,
927 fetch_refs_via_pack,
928 git_transport_push,
929 connect_git,
930 disconnect_git
931 };
932
933 struct transport *transport_get(struct remote *remote, const char *url)
934 {
935 const char *helper;
936 struct transport *ret = xcalloc(1, sizeof(*ret));
937
938 ret->progress = isatty(2);
939
940 if (!remote)
941 BUG("No remote provided to transport_get()");
942
943 ret->got_remote_refs = 0;
944 ret->remote = remote;
945 helper = remote->foreign_vcs;
946
947 if (!url && remote->url)
948 url = remote->url[0];
949 ret->url = url;
950
951 /* maybe it is a foreign URL? */
952 if (url) {
953 const char *p = url;
954
955 while (is_urlschemechar(p == url, *p))
956 p++;
957 if (starts_with(p, "::"))
958 helper = xstrndup(url, p - url);
959 }
960
961 if (helper) {
962 transport_helper_init(ret, helper);
963 } else if (starts_with(url, "rsync:")) {
964 die(_("git-over-rsync is no longer supported"));
965 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
966 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
967 transport_check_allowed("file");
968 ret->data = data;
969 ret->vtable = &bundle_vtable;
970 ret->smart_options = NULL;
971 } else if (!is_url(url)
972 || starts_with(url, "file://")
973 || starts_with(url, "git://")
974 || starts_with(url, "ssh://")
975 || starts_with(url, "git+ssh://") /* deprecated - do not use */
976 || starts_with(url, "ssh+git://") /* deprecated - do not use */
977 ) {
978 /*
979 * These are builtin smart transports; "allowed" transports
980 * will be checked individually in git_connect.
981 */
982 struct git_transport_data *data = xcalloc(1, sizeof(*data));
983 ret->data = data;
984 ret->vtable = &builtin_smart_vtable;
985 ret->smart_options = &(data->options);
986
987 data->conn = NULL;
988 data->got_remote_heads = 0;
989 } else {
990 /* Unknown protocol in URL. Pass to external handler. */
991 int len = external_specification_len(url);
992 char *handler = xmemdupz(url, len);
993 transport_helper_init(ret, handler);
994 }
995
996 if (ret->smart_options) {
997 ret->smart_options->thin = 1;
998 ret->smart_options->uploadpack = "git-upload-pack";
999 if (remote->uploadpack)
1000 ret->smart_options->uploadpack = remote->uploadpack;
1001 ret->smart_options->receivepack = "git-receive-pack";
1002 if (remote->receivepack)
1003 ret->smart_options->receivepack = remote->receivepack;
1004 }
1005
1006 ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1007
1008 return ret;
1009 }
1010
1011 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1012 {
1013 return transport->hash_algo;
1014 }
1015
1016 int transport_set_option(struct transport *transport,
1017 const char *name, const char *value)
1018 {
1019 int git_reports = 1, protocol_reports = 1;
1020
1021 if (transport->smart_options)
1022 git_reports = set_git_option(transport->smart_options,
1023 name, value);
1024
1025 if (transport->vtable->set_option)
1026 protocol_reports = transport->vtable->set_option(transport,
1027 name, value);
1028
1029 /* If either report is 0, report 0 (success). */
1030 if (!git_reports || !protocol_reports)
1031 return 0;
1032 /* If either reports -1 (invalid value), report -1. */
1033 if ((git_reports == -1) || (protocol_reports == -1))
1034 return -1;
1035 /* Otherwise if both report unknown, report unknown. */
1036 return 1;
1037 }
1038
1039 void transport_set_verbosity(struct transport *transport, int verbosity,
1040 int force_progress)
1041 {
1042 if (verbosity >= 1)
1043 transport->verbose = verbosity <= 3 ? verbosity : 3;
1044 if (verbosity < 0)
1045 transport->verbose = -1;
1046
1047 /**
1048 * Rules used to determine whether to report progress (processing aborts
1049 * when a rule is satisfied):
1050 *
1051 * . Report progress, if force_progress is 1 (ie. --progress).
1052 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1053 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1054 * . Report progress if isatty(2) is 1.
1055 **/
1056 if (force_progress >= 0)
1057 transport->progress = !!force_progress;
1058 else
1059 transport->progress = verbosity >= 0 && isatty(2);
1060 }
1061
1062 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1063 {
1064 int i;
1065
1066 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1067 "not be found on any remote:\n"));
1068 for (i = 0; i < needs_pushing->nr; i++)
1069 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1070 fprintf(stderr, _("\nPlease try\n\n"
1071 " git push --recurse-submodules=on-demand\n\n"
1072 "or cd to the path and use\n\n"
1073 " git push\n\n"
1074 "to push them to a remote.\n\n"));
1075
1076 string_list_clear(needs_pushing, 0);
1077
1078 die(_("Aborting."));
1079 }
1080
1081 static int run_pre_push_hook(struct transport *transport,
1082 struct ref *remote_refs)
1083 {
1084 int ret = 0, x;
1085 struct ref *r;
1086 struct child_process proc = CHILD_PROCESS_INIT;
1087 struct strbuf buf;
1088 const char *argv[4];
1089
1090 if (!(argv[0] = find_hook("pre-push")))
1091 return 0;
1092
1093 argv[1] = transport->remote->name;
1094 argv[2] = transport->url;
1095 argv[3] = NULL;
1096
1097 proc.argv = argv;
1098 proc.in = -1;
1099 proc.trace2_hook_name = "pre-push";
1100
1101 if (start_command(&proc)) {
1102 finish_command(&proc);
1103 return -1;
1104 }
1105
1106 sigchain_push(SIGPIPE, SIG_IGN);
1107
1108 strbuf_init(&buf, 256);
1109
1110 for (r = remote_refs; r; r = r->next) {
1111 if (!r->peer_ref) continue;
1112 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1113 if (r->status == REF_STATUS_REJECT_STALE) continue;
1114 if (r->status == REF_STATUS_UPTODATE) continue;
1115
1116 strbuf_reset(&buf);
1117 strbuf_addf( &buf, "%s %s %s %s\n",
1118 r->peer_ref->name, oid_to_hex(&r->new_oid),
1119 r->name, oid_to_hex(&r->old_oid));
1120
1121 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1122 /* We do not mind if a hook does not read all refs. */
1123 if (errno != EPIPE)
1124 ret = -1;
1125 break;
1126 }
1127 }
1128
1129 strbuf_release(&buf);
1130
1131 x = close(proc.in);
1132 if (!ret)
1133 ret = x;
1134
1135 sigchain_pop(SIGPIPE);
1136
1137 x = finish_command(&proc);
1138 if (!ret)
1139 ret = x;
1140
1141 return ret;
1142 }
1143
1144 int transport_push(struct repository *r,
1145 struct transport *transport,
1146 struct refspec *rs, int flags,
1147 unsigned int *reject_reasons)
1148 {
1149 *reject_reasons = 0;
1150
1151 if (transport_color_config() < 0)
1152 return -1;
1153
1154 if (transport->vtable->push_refs) {
1155 struct ref *remote_refs;
1156 struct ref *local_refs = get_local_heads();
1157 int match_flags = MATCH_REFS_NONE;
1158 int verbose = (transport->verbose > 0);
1159 int quiet = (transport->verbose < 0);
1160 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1161 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1162 int push_ret, ret, err;
1163 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1164
1165 if (check_push_refs(local_refs, rs) < 0)
1166 return -1;
1167
1168 refspec_ref_prefixes(rs, &ref_prefixes);
1169
1170 trace2_region_enter("transport_push", "get_refs_list", r);
1171 remote_refs = transport->vtable->get_refs_list(transport, 1,
1172 &ref_prefixes);
1173 trace2_region_leave("transport_push", "get_refs_list", r);
1174
1175 argv_array_clear(&ref_prefixes);
1176
1177 if (flags & TRANSPORT_PUSH_ALL)
1178 match_flags |= MATCH_REFS_ALL;
1179 if (flags & TRANSPORT_PUSH_MIRROR)
1180 match_flags |= MATCH_REFS_MIRROR;
1181 if (flags & TRANSPORT_PUSH_PRUNE)
1182 match_flags |= MATCH_REFS_PRUNE;
1183 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1184 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1185
1186 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1187 return -1;
1188
1189 if (transport->smart_options &&
1190 transport->smart_options->cas &&
1191 !is_empty_cas(transport->smart_options->cas))
1192 apply_push_cas(transport->smart_options->cas,
1193 transport->remote, remote_refs);
1194
1195 set_ref_status_for_push(remote_refs,
1196 flags & TRANSPORT_PUSH_MIRROR,
1197 flags & TRANSPORT_PUSH_FORCE);
1198
1199 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1200 if (run_pre_push_hook(transport, remote_refs))
1201 return -1;
1202
1203 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1204 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1205 !is_bare_repository()) {
1206 struct ref *ref = remote_refs;
1207 struct oid_array commits = OID_ARRAY_INIT;
1208
1209 trace2_region_enter("transport_push", "push_submodules", r);
1210 for (; ref; ref = ref->next)
1211 if (!is_null_oid(&ref->new_oid))
1212 oid_array_append(&commits,
1213 &ref->new_oid);
1214
1215 if (!push_unpushed_submodules(r,
1216 &commits,
1217 transport->remote,
1218 rs,
1219 transport->push_options,
1220 pretend)) {
1221 oid_array_clear(&commits);
1222 trace2_region_leave("transport_push", "push_submodules", r);
1223 die(_("failed to push all needed submodules"));
1224 }
1225 oid_array_clear(&commits);
1226 trace2_region_leave("transport_push", "push_submodules", r);
1227 }
1228
1229 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1230 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1231 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1232 !pretend)) && !is_bare_repository()) {
1233 struct ref *ref = remote_refs;
1234 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1235 struct oid_array commits = OID_ARRAY_INIT;
1236
1237 trace2_region_enter("transport_push", "check_submodules", r);
1238 for (; ref; ref = ref->next)
1239 if (!is_null_oid(&ref->new_oid))
1240 oid_array_append(&commits,
1241 &ref->new_oid);
1242
1243 if (find_unpushed_submodules(r,
1244 &commits,
1245 transport->remote->name,
1246 &needs_pushing)) {
1247 oid_array_clear(&commits);
1248 trace2_region_leave("transport_push", "check_submodules", r);
1249 die_with_unpushed_submodules(&needs_pushing);
1250 }
1251 string_list_clear(&needs_pushing, 0);
1252 oid_array_clear(&commits);
1253 trace2_region_leave("transport_push", "check_submodules", r);
1254 }
1255
1256 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1257 trace2_region_enter("transport_push", "push_refs", r);
1258 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1259 trace2_region_leave("transport_push", "push_refs", r);
1260 } else
1261 push_ret = 0;
1262 err = push_had_errors(remote_refs);
1263 ret = push_ret | err;
1264
1265 if (!quiet || err)
1266 transport_print_push_status(transport->url, remote_refs,
1267 verbose | porcelain, porcelain,
1268 reject_reasons);
1269
1270 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1271 set_upstreams(transport, remote_refs, pretend);
1272
1273 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1274 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1275 struct ref *ref;
1276 for (ref = remote_refs; ref; ref = ref->next)
1277 transport_update_tracking_ref(transport->remote, ref, verbose);
1278 }
1279
1280 if (porcelain && !push_ret)
1281 puts("Done");
1282 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1283 fprintf(stderr, "Everything up-to-date\n");
1284
1285 return ret;
1286 }
1287 return 1;
1288 }
1289
1290 const struct ref *transport_get_remote_refs(struct transport *transport,
1291 const struct argv_array *ref_prefixes)
1292 {
1293 if (!transport->got_remote_refs) {
1294 transport->remote_refs =
1295 transport->vtable->get_refs_list(transport, 0,
1296 ref_prefixes);
1297 transport->got_remote_refs = 1;
1298 }
1299
1300 return transport->remote_refs;
1301 }
1302
1303 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1304 {
1305 int rc;
1306 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1307 struct ref **heads = NULL;
1308 struct ref *rm;
1309
1310 for (rm = refs; rm; rm = rm->next) {
1311 nr_refs++;
1312 if (rm->peer_ref &&
1313 !is_null_oid(&rm->old_oid) &&
1314 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1315 continue;
1316 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1317 heads[nr_heads++] = rm;
1318 }
1319
1320 if (!nr_heads) {
1321 /*
1322 * When deepening of a shallow repository is requested,
1323 * then local and remote refs are likely to still be equal.
1324 * Just feed them all to the fetch method in that case.
1325 * This condition shouldn't be met in a non-deepening fetch
1326 * (see builtin/fetch.c:quickfetch()).
1327 */
1328 ALLOC_ARRAY(heads, nr_refs);
1329 for (rm = refs; rm; rm = rm->next)
1330 heads[nr_heads++] = rm;
1331 }
1332
1333 rc = transport->vtable->fetch(transport, nr_heads, heads);
1334
1335 free(heads);
1336 return rc;
1337 }
1338
1339 void transport_unlock_pack(struct transport *transport)
1340 {
1341 if (transport->pack_lockfile) {
1342 unlink_or_warn(transport->pack_lockfile);
1343 FREE_AND_NULL(transport->pack_lockfile);
1344 }
1345 }
1346
1347 int transport_connect(struct transport *transport, const char *name,
1348 const char *exec, int fd[2])
1349 {
1350 if (transport->vtable->connect)
1351 return transport->vtable->connect(transport, name, exec, fd);
1352 else
1353 die(_("operation not supported by protocol"));
1354 }
1355
1356 int transport_disconnect(struct transport *transport)
1357 {
1358 int ret = 0;
1359 if (transport->vtable->disconnect)
1360 ret = transport->vtable->disconnect(transport);
1361 free(transport);
1362 return ret;
1363 }
1364
1365 /*
1366 * Strip username (and password) from a URL and return
1367 * it in a newly allocated string.
1368 */
1369 char *transport_anonymize_url(const char *url)
1370 {
1371 char *scheme_prefix, *anon_part;
1372 size_t anon_len, prefix_len = 0;
1373
1374 anon_part = strchr(url, '@');
1375 if (url_is_local_not_ssh(url) || !anon_part)
1376 goto literal_copy;
1377
1378 anon_len = strlen(++anon_part);
1379 scheme_prefix = strstr(url, "://");
1380 if (!scheme_prefix) {
1381 if (!strchr(anon_part, ':'))
1382 /* cannot be "me@there:/path/name" */
1383 goto literal_copy;
1384 } else {
1385 const char *cp;
1386 /* make sure scheme is reasonable */
1387 for (cp = url; cp < scheme_prefix; cp++) {
1388 switch (*cp) {
1389 /* RFC 1738 2.1 */
1390 case '+': case '.': case '-':
1391 break; /* ok */
1392 default:
1393 if (isalnum(*cp))
1394 break;
1395 /* it isn't */
1396 goto literal_copy;
1397 }
1398 }
1399 /* @ past the first slash does not count */
1400 cp = strchr(scheme_prefix + 3, '/');
1401 if (cp && cp < anon_part)
1402 goto literal_copy;
1403 prefix_len = scheme_prefix - url + 3;
1404 }
1405 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1406 (int)anon_len, anon_part);
1407 literal_copy:
1408 return xstrdup(url);
1409 }
ramsay's fork of git