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linear-assignment: fix potential out of bounds memory access
[git.git] / transport.c
blobb64b7bcb86f3c807d6a0dcd1dce26c7ee7fbb966
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 };
126
127 static struct ref *get_refs_from_bundle(struct transport *transport,
128 int for_push,
129 const struct argv_array *ref_prefixes)
130 {
131 struct bundle_transport_data *data = transport->data;
132 struct ref *result = NULL;
133 int i;
134
135 if (for_push)
136 return NULL;
137
138 if (data->fd > 0)
139 close(data->fd);
140 data->fd = read_bundle_header(transport->url, &data->header);
141 if (data->fd < 0)
142 die ("Could not read bundle '%s'.", transport->url);
143 for (i = 0; i < data->header.references.nr; i++) {
144 struct ref_list_entry *e = data->header.references.list + i;
145 struct ref *ref = alloc_ref(e->name);
146 oidcpy(&ref->old_oid, &e->oid);
147 ref->next = result;
148 result = ref;
149 }
150 return result;
151 }
152
153 static int fetch_refs_from_bundle(struct transport *transport,
154 int nr_heads, struct ref **to_fetch,
155 struct ref **fetched_refs)
156 {
157 struct bundle_transport_data *data = transport->data;
158 return unbundle(&data->header, data->fd,
159 transport->progress ? BUNDLE_VERBOSE : 0);
160 }
161
162 static int close_bundle(struct transport *transport)
163 {
164 struct bundle_transport_data *data = transport->data;
165 if (data->fd > 0)
166 close(data->fd);
167 free(data);
168 return 0;
169 }
170
171 struct git_transport_data {
172 struct git_transport_options options;
173 struct child_process *conn;
174 int fd[2];
175 unsigned got_remote_heads : 1;
176 enum protocol_version version;
177 struct oid_array extra_have;
178 struct oid_array shallow;
179 };
180
181 static int set_git_option(struct git_transport_options *opts,
182 const char *name, const char *value)
183 {
184 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
185 opts->uploadpack = value;
186 return 0;
187 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
188 opts->receivepack = value;
189 return 0;
190 } else if (!strcmp(name, TRANS_OPT_THIN)) {
191 opts->thin = !!value;
192 return 0;
193 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
194 opts->followtags = !!value;
195 return 0;
196 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
197 opts->keep = !!value;
198 return 0;
199 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
200 opts->update_shallow = !!value;
201 return 0;
202 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
203 if (!value)
204 opts->depth = 0;
205 else {
206 char *end;
207 opts->depth = strtol(value, &end, 0);
208 if (*end)
209 die(_("transport: invalid depth option '%s'"), value);
210 }
211 return 0;
212 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
213 opts->deepen_since = value;
214 return 0;
215 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
216 opts->deepen_not = (const struct string_list *)value;
217 return 0;
218 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
219 opts->deepen_relative = !!value;
220 return 0;
221 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
222 opts->from_promisor = !!value;
223 return 0;
224 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
225 opts->no_dependents = !!value;
226 return 0;
227 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
228 parse_list_objects_filter(&opts->filter_options, value);
229 return 0;
230 }
231 return 1;
232 }
233
234 static int connect_setup(struct transport *transport, int for_push)
235 {
236 struct git_transport_data *data = transport->data;
237 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
238
239 if (data->conn)
240 return 0;
241
242 switch (transport->family) {
243 case TRANSPORT_FAMILY_ALL: break;
244 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
245 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
246 }
247
248 data->conn = git_connect(data->fd, transport->url,
249 for_push ? data->options.receivepack :
250 data->options.uploadpack,
251 flags);
252
253 return 0;
254 }
255
256 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
257 const struct argv_array *ref_prefixes)
258 {
259 struct git_transport_data *data = transport->data;
260 struct ref *refs = NULL;
261 struct packet_reader reader;
262
263 connect_setup(transport, for_push);
264
265 packet_reader_init(&reader, data->fd[0], NULL, 0,
266 PACKET_READ_CHOMP_NEWLINE |
267 PACKET_READ_GENTLE_ON_EOF);
268
269 data->version = discover_version(&reader);
270 switch (data->version) {
271 case protocol_v2:
272 get_remote_refs(data->fd[1], &reader, &refs, for_push,
273 ref_prefixes, transport->server_options);
274 break;
275 case protocol_v1:
276 case protocol_v0:
277 get_remote_heads(&reader, &refs,
278 for_push ? REF_NORMAL : 0,
279 &data->extra_have,
280 &data->shallow);
281 break;
282 case protocol_unknown_version:
283 BUG("unknown protocol version");
284 }
285 data->got_remote_heads = 1;
286
287 return refs;
288 }
289
290 static int fetch_refs_via_pack(struct transport *transport,
291 int nr_heads, struct ref **to_fetch,
292 struct ref **fetched_refs)
293 {
294 int ret = 0;
295 struct git_transport_data *data = transport->data;
296 struct ref *refs = NULL;
297 char *dest = xstrdup(transport->url);
298 struct fetch_pack_args args;
299 struct ref *refs_tmp = NULL;
300
301 memset(&args, 0, sizeof(args));
302 args.uploadpack = data->options.uploadpack;
303 args.keep_pack = data->options.keep;
304 args.lock_pack = 1;
305 args.use_thin_pack = data->options.thin;
306 args.include_tag = data->options.followtags;
307 args.verbose = (transport->verbose > 1);
308 args.quiet = (transport->verbose < 0);
309 args.no_progress = !transport->progress;
310 args.depth = data->options.depth;
311 args.deepen_since = data->options.deepen_since;
312 args.deepen_not = data->options.deepen_not;
313 args.deepen_relative = data->options.deepen_relative;
314 args.check_self_contained_and_connected =
315 data->options.check_self_contained_and_connected;
316 args.cloning = transport->cloning;
317 args.update_shallow = data->options.update_shallow;
318 args.from_promisor = data->options.from_promisor;
319 args.no_dependents = data->options.no_dependents;
320 args.filter_options = data->options.filter_options;
321 args.stateless_rpc = transport->stateless_rpc;
322 args.server_options = transport->server_options;
323 args.negotiation_tips = data->options.negotiation_tips;
324
325 if (!data->got_remote_heads)
326 refs_tmp = get_refs_via_connect(transport, 0, NULL);
327
328 switch (data->version) {
329 case protocol_v2:
330 refs = fetch_pack(&args, data->fd, data->conn,
331 refs_tmp ? refs_tmp : transport->remote_refs,
332 dest, to_fetch, nr_heads, &data->shallow,
333 &transport->pack_lockfile, data->version);
334 break;
335 case protocol_v1:
336 case protocol_v0:
337 refs = fetch_pack(&args, data->fd, data->conn,
338 refs_tmp ? refs_tmp : transport->remote_refs,
339 dest, to_fetch, nr_heads, &data->shallow,
340 &transport->pack_lockfile, data->version);
341 break;
342 case protocol_unknown_version:
343 BUG("unknown protocol version");
344 }
345
346 close(data->fd[0]);
347 close(data->fd[1]);
348 if (finish_connect(data->conn))
349 ret = -1;
350 data->conn = NULL;
351 data->got_remote_heads = 0;
352 data->options.self_contained_and_connected =
353 args.self_contained_and_connected;
354 data->options.connectivity_checked = args.connectivity_checked;
355
356 if (refs == NULL)
357 ret = -1;
358 if (report_unmatched_refs(to_fetch, nr_heads))
359 ret = -1;
360
361 if (fetched_refs)
362 *fetched_refs = refs;
363 else
364 free_refs(refs);
365
366 free_refs(refs_tmp);
367 free(dest);
368 return ret;
369 }
370
371 static int push_had_errors(struct ref *ref)
372 {
373 for (; ref; ref = ref->next) {
374 switch (ref->status) {
375 case REF_STATUS_NONE:
376 case REF_STATUS_UPTODATE:
377 case REF_STATUS_OK:
378 break;
379 default:
380 return 1;
381 }
382 }
383 return 0;
384 }
385
386 int transport_refs_pushed(struct ref *ref)
387 {
388 for (; ref; ref = ref->next) {
389 switch(ref->status) {
390 case REF_STATUS_NONE:
391 case REF_STATUS_UPTODATE:
392 break;
393 default:
394 return 1;
395 }
396 }
397 return 0;
398 }
399
400 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
401 {
402 struct refspec_item rs;
403
404 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
405 return;
406
407 rs.src = ref->name;
408 rs.dst = NULL;
409
410 if (!remote_find_tracking(remote, &rs)) {
411 if (verbose)
412 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
413 if (ref->deletion) {
414 delete_ref(NULL, rs.dst, NULL, 0);
415 } else
416 update_ref("update by push", rs.dst, &ref->new_oid,
417 NULL, 0, 0);
418 free(rs.dst);
419 }
420 }
421
422 static void print_ref_status(char flag, const char *summary,
423 struct ref *to, struct ref *from, const char *msg,
424 int porcelain, int summary_width)
425 {
426 if (porcelain) {
427 if (from)
428 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
429 else
430 fprintf(stdout, "%c\t:%s\t", flag, to->name);
431 if (msg)
432 fprintf(stdout, "%s (%s)\n", summary, msg);
433 else
434 fprintf(stdout, "%s\n", summary);
435 } else {
436 const char *red = "", *reset = "";
437 if (push_had_errors(to)) {
438 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
439 reset = transport_get_color(TRANSPORT_COLOR_RESET);
440 }
441 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
442 summary, reset);
443 if (from)
444 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
445 else
446 fputs(prettify_refname(to->name), stderr);
447 if (msg) {
448 fputs(" (", stderr);
449 fputs(msg, stderr);
450 fputc(')', stderr);
451 }
452 fputc('\n', stderr);
453 }
454 }
455
456 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
457 {
458 if (ref->deletion)
459 print_ref_status('-', "[deleted]", ref, NULL, NULL,
460 porcelain, summary_width);
461 else if (is_null_oid(&ref->old_oid))
462 print_ref_status('*',
463 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
464 "[new branch]"),
465 ref, ref->peer_ref, NULL, porcelain, summary_width);
466 else {
467 struct strbuf quickref = STRBUF_INIT;
468 char type;
469 const char *msg;
470
471 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
472 DEFAULT_ABBREV);
473 if (ref->forced_update) {
474 strbuf_addstr(&quickref, "...");
475 type = '+';
476 msg = "forced update";
477 } else {
478 strbuf_addstr(&quickref, "..");
479 type = ' ';
480 msg = NULL;
481 }
482 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
483 DEFAULT_ABBREV);
484
485 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
486 porcelain, summary_width);
487 strbuf_release(&quickref);
488 }
489 }
490
491 static int print_one_push_status(struct ref *ref, const char *dest, int count,
492 int porcelain, int summary_width)
493 {
494 if (!count) {
495 char *url = transport_anonymize_url(dest);
496 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
497 free(url);
498 }
499
500 switch(ref->status) {
501 case REF_STATUS_NONE:
502 print_ref_status('X', "[no match]", ref, NULL, NULL,
503 porcelain, summary_width);
504 break;
505 case REF_STATUS_REJECT_NODELETE:
506 print_ref_status('!', "[rejected]", ref, NULL,
507 "remote does not support deleting refs",
508 porcelain, summary_width);
509 break;
510 case REF_STATUS_UPTODATE:
511 print_ref_status('=', "[up to date]", ref,
512 ref->peer_ref, NULL, porcelain, summary_width);
513 break;
514 case REF_STATUS_REJECT_NONFASTFORWARD:
515 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
516 "non-fast-forward", porcelain, summary_width);
517 break;
518 case REF_STATUS_REJECT_ALREADY_EXISTS:
519 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
520 "already exists", porcelain, summary_width);
521 break;
522 case REF_STATUS_REJECT_FETCH_FIRST:
523 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
524 "fetch first", porcelain, summary_width);
525 break;
526 case REF_STATUS_REJECT_NEEDS_FORCE:
527 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
528 "needs force", porcelain, summary_width);
529 break;
530 case REF_STATUS_REJECT_STALE:
531 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
532 "stale info", porcelain, summary_width);
533 break;
534 case REF_STATUS_REJECT_SHALLOW:
535 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
536 "new shallow roots not allowed",
537 porcelain, summary_width);
538 break;
539 case REF_STATUS_REMOTE_REJECT:
540 print_ref_status('!', "[remote rejected]", ref,
541 ref->deletion ? NULL : ref->peer_ref,
542 ref->remote_status, porcelain, summary_width);
543 break;
544 case REF_STATUS_EXPECTING_REPORT:
545 print_ref_status('!', "[remote failure]", ref,
546 ref->deletion ? NULL : ref->peer_ref,
547 "remote failed to report status",
548 porcelain, summary_width);
549 break;
550 case REF_STATUS_ATOMIC_PUSH_FAILED:
551 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
552 "atomic push failed", porcelain, summary_width);
553 break;
554 case REF_STATUS_OK:
555 print_ok_ref_status(ref, porcelain, summary_width);
556 break;
557 }
558
559 return 1;
560 }
561
562 static int measure_abbrev(const struct object_id *oid, int sofar)
563 {
564 char hex[GIT_MAX_HEXSZ + 1];
565 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
566
567 return (w < sofar) ? sofar : w;
568 }
569
570 int transport_summary_width(const struct ref *refs)
571 {
572 int maxw = -1;
573
574 for (; refs; refs = refs->next) {
575 maxw = measure_abbrev(&refs->old_oid, maxw);
576 maxw = measure_abbrev(&refs->new_oid, maxw);
577 }
578 if (maxw < 0)
579 maxw = FALLBACK_DEFAULT_ABBREV;
580 return (2 * maxw + 3);
581 }
582
583 void transport_print_push_status(const char *dest, struct ref *refs,
584 int verbose, int porcelain, unsigned int *reject_reasons)
585 {
586 struct ref *ref;
587 int n = 0;
588 char *head;
589 int summary_width = transport_summary_width(refs);
590
591 if (transport_color_config() < 0)
592 warning(_("could not parse transport.color.* config"));
593
594 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
595
596 if (verbose) {
597 for (ref = refs; ref; ref = ref->next)
598 if (ref->status == REF_STATUS_UPTODATE)
599 n += print_one_push_status(ref, dest, n,
600 porcelain, summary_width);
601 }
602
603 for (ref = refs; ref; ref = ref->next)
604 if (ref->status == REF_STATUS_OK)
605 n += print_one_push_status(ref, dest, n,
606 porcelain, summary_width);
607
608 *reject_reasons = 0;
609 for (ref = refs; ref; ref = ref->next) {
610 if (ref->status != REF_STATUS_NONE &&
611 ref->status != REF_STATUS_UPTODATE &&
612 ref->status != REF_STATUS_OK)
613 n += print_one_push_status(ref, dest, n,
614 porcelain, summary_width);
615 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
616 if (head != NULL && !strcmp(head, ref->name))
617 *reject_reasons |= REJECT_NON_FF_HEAD;
618 else
619 *reject_reasons |= REJECT_NON_FF_OTHER;
620 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
621 *reject_reasons |= REJECT_ALREADY_EXISTS;
622 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
623 *reject_reasons |= REJECT_FETCH_FIRST;
624 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
625 *reject_reasons |= REJECT_NEEDS_FORCE;
626 }
627 }
628 free(head);
629 }
630
631 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
632 {
633 struct git_transport_data *data = transport->data;
634 struct send_pack_args args;
635 int ret = 0;
636
637 if (transport_color_config() < 0)
638 return -1;
639
640 if (!data->got_remote_heads)
641 get_refs_via_connect(transport, 1, NULL);
642
643 memset(&args, 0, sizeof(args));
644 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
645 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
646 args.use_thin_pack = data->options.thin;
647 args.verbose = (transport->verbose > 0);
648 args.quiet = (transport->verbose < 0);
649 args.progress = transport->progress;
650 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
651 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
652 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
653 args.push_options = transport->push_options;
654 args.url = transport->url;
655
656 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
657 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
658 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
659 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
660 else
661 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
662
663 switch (data->version) {
664 case protocol_v2:
665 die("support for protocol v2 not implemented yet");
666 break;
667 case protocol_v1:
668 case protocol_v0:
669 ret = send_pack(&args, data->fd, data->conn, remote_refs,
670 &data->extra_have);
671 break;
672 case protocol_unknown_version:
673 BUG("unknown protocol version");
674 }
675
676 close(data->fd[1]);
677 close(data->fd[0]);
678 ret |= finish_connect(data->conn);
679 data->conn = NULL;
680 data->got_remote_heads = 0;
681
682 return ret;
683 }
684
685 static int connect_git(struct transport *transport, const char *name,
686 const char *executable, int fd[2])
687 {
688 struct git_transport_data *data = transport->data;
689 data->conn = git_connect(data->fd, transport->url,
690 executable, 0);
691 fd[0] = data->fd[0];
692 fd[1] = data->fd[1];
693 return 0;
694 }
695
696 static int disconnect_git(struct transport *transport)
697 {
698 struct git_transport_data *data = transport->data;
699 if (data->conn) {
700 if (data->got_remote_heads)
701 packet_flush(data->fd[1]);
702 close(data->fd[0]);
703 close(data->fd[1]);
704 finish_connect(data->conn);
705 }
706
707 free(data);
708 return 0;
709 }
710
711 static struct transport_vtable taken_over_vtable = {
712 NULL,
713 get_refs_via_connect,
714 fetch_refs_via_pack,
715 git_transport_push,
716 NULL,
717 disconnect_git
718 };
719
720 void transport_take_over(struct transport *transport,
721 struct child_process *child)
722 {
723 struct git_transport_data *data;
724
725 if (!transport->smart_options)
726 BUG("taking over transport requires non-NULL "
727 "smart_options field.");
728
729 data = xcalloc(1, sizeof(*data));
730 data->options = *transport->smart_options;
731 data->conn = child;
732 data->fd[0] = data->conn->out;
733 data->fd[1] = data->conn->in;
734 data->got_remote_heads = 0;
735 transport->data = data;
736
737 transport->vtable = &taken_over_vtable;
738 transport->smart_options = &(data->options);
739
740 transport->cannot_reuse = 1;
741 }
742
743 static int is_file(const char *url)
744 {
745 struct stat buf;
746 if (stat(url, &buf))
747 return 0;
748 return S_ISREG(buf.st_mode);
749 }
750
751 static int external_specification_len(const char *url)
752 {
753 return strchr(url, ':') - url;
754 }
755
756 static const struct string_list *protocol_whitelist(void)
757 {
758 static int enabled = -1;
759 static struct string_list allowed = STRING_LIST_INIT_DUP;
760
761 if (enabled < 0) {
762 const char *v = getenv("GIT_ALLOW_PROTOCOL");
763 if (v) {
764 string_list_split(&allowed, v, ':', -1);
765 string_list_sort(&allowed);
766 enabled = 1;
767 } else {
768 enabled = 0;
769 }
770 }
771
772 return enabled ? &allowed : NULL;
773 }
774
775 enum protocol_allow_config {
776 PROTOCOL_ALLOW_NEVER = 0,
777 PROTOCOL_ALLOW_USER_ONLY,
778 PROTOCOL_ALLOW_ALWAYS
779 };
780
781 static enum protocol_allow_config parse_protocol_config(const char *key,
782 const char *value)
783 {
784 if (!strcasecmp(value, "always"))
785 return PROTOCOL_ALLOW_ALWAYS;
786 else if (!strcasecmp(value, "never"))
787 return PROTOCOL_ALLOW_NEVER;
788 else if (!strcasecmp(value, "user"))
789 return PROTOCOL_ALLOW_USER_ONLY;
790
791 die("unknown value for config '%s': %s", key, value);
792 }
793
794 static enum protocol_allow_config get_protocol_config(const char *type)
795 {
796 char *key = xstrfmt("protocol.%s.allow", type);
797 char *value;
798
799 /* first check the per-protocol config */
800 if (!git_config_get_string(key, &value)) {
801 enum protocol_allow_config ret =
802 parse_protocol_config(key, value);
803 free(key);
804 free(value);
805 return ret;
806 }
807 free(key);
808
809 /* if defined, fallback to user-defined default for unknown protocols */
810 if (!git_config_get_string("protocol.allow", &value)) {
811 enum protocol_allow_config ret =
812 parse_protocol_config("protocol.allow", value);
813 free(value);
814 return ret;
815 }
816
817 /* fallback to built-in defaults */
818 /* known safe */
819 if (!strcmp(type, "http") ||
820 !strcmp(type, "https") ||
821 !strcmp(type, "git") ||
822 !strcmp(type, "ssh") ||
823 !strcmp(type, "file"))
824 return PROTOCOL_ALLOW_ALWAYS;
825
826 /* known scary; err on the side of caution */
827 if (!strcmp(type, "ext"))
828 return PROTOCOL_ALLOW_NEVER;
829
830 /* unknown; by default let them be used only directly by the user */
831 return PROTOCOL_ALLOW_USER_ONLY;
832 }
833
834 int is_transport_allowed(const char *type, int from_user)
835 {
836 const struct string_list *whitelist = protocol_whitelist();
837 if (whitelist)
838 return string_list_has_string(whitelist, type);
839
840 switch (get_protocol_config(type)) {
841 case PROTOCOL_ALLOW_ALWAYS:
842 return 1;
843 case PROTOCOL_ALLOW_NEVER:
844 return 0;
845 case PROTOCOL_ALLOW_USER_ONLY:
846 if (from_user < 0)
847 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
848 return from_user;
849 }
850
851 BUG("invalid protocol_allow_config type");
852 }
853
854 void transport_check_allowed(const char *type)
855 {
856 if (!is_transport_allowed(type, -1))
857 die("transport '%s' not allowed", type);
858 }
859
860 static struct transport_vtable bundle_vtable = {
861 NULL,
862 get_refs_from_bundle,
863 fetch_refs_from_bundle,
864 NULL,
865 NULL,
866 close_bundle
867 };
868
869 static struct transport_vtable builtin_smart_vtable = {
870 NULL,
871 get_refs_via_connect,
872 fetch_refs_via_pack,
873 git_transport_push,
874 connect_git,
875 disconnect_git
876 };
877
878 struct transport *transport_get(struct remote *remote, const char *url)
879 {
880 const char *helper;
881 struct transport *ret = xcalloc(1, sizeof(*ret));
882
883 ret->progress = isatty(2);
884
885 if (!remote)
886 die("No remote provided to transport_get()");
887
888 ret->got_remote_refs = 0;
889 ret->remote = remote;
890 helper = remote->foreign_vcs;
891
892 if (!url && remote->url)
893 url = remote->url[0];
894 ret->url = url;
895
896 /* maybe it is a foreign URL? */
897 if (url) {
898 const char *p = url;
899
900 while (is_urlschemechar(p == url, *p))
901 p++;
902 if (starts_with(p, "::"))
903 helper = xstrndup(url, p - url);
904 }
905
906 if (helper) {
907 transport_helper_init(ret, helper);
908 } else if (starts_with(url, "rsync:")) {
909 die("git-over-rsync is no longer supported");
910 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
911 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
912 transport_check_allowed("file");
913 ret->data = data;
914 ret->vtable = &bundle_vtable;
915 ret->smart_options = NULL;
916 } else if (!is_url(url)
917 || starts_with(url, "file://")
918 || starts_with(url, "git://")
919 || starts_with(url, "ssh://")
920 || starts_with(url, "git+ssh://") /* deprecated - do not use */
921 || starts_with(url, "ssh+git://") /* deprecated - do not use */
922 ) {
923 /*
924 * These are builtin smart transports; "allowed" transports
925 * will be checked individually in git_connect.
926 */
927 struct git_transport_data *data = xcalloc(1, sizeof(*data));
928 ret->data = data;
929 ret->vtable = &builtin_smart_vtable;
930 ret->smart_options = &(data->options);
931
932 data->conn = NULL;
933 data->got_remote_heads = 0;
934 } else {
935 /* Unknown protocol in URL. Pass to external handler. */
936 int len = external_specification_len(url);
937 char *handler = xmemdupz(url, len);
938 transport_helper_init(ret, handler);
939 }
940
941 if (ret->smart_options) {
942 ret->smart_options->thin = 1;
943 ret->smart_options->uploadpack = "git-upload-pack";
944 if (remote->uploadpack)
945 ret->smart_options->uploadpack = remote->uploadpack;
946 ret->smart_options->receivepack = "git-receive-pack";
947 if (remote->receivepack)
948 ret->smart_options->receivepack = remote->receivepack;
949 }
950
951 return ret;
952 }
953
954 int transport_set_option(struct transport *transport,
955 const char *name, const char *value)
956 {
957 int git_reports = 1, protocol_reports = 1;
958
959 if (transport->smart_options)
960 git_reports = set_git_option(transport->smart_options,
961 name, value);
962
963 if (transport->vtable->set_option)
964 protocol_reports = transport->vtable->set_option(transport,
965 name, value);
966
967 /* If either report is 0, report 0 (success). */
968 if (!git_reports || !protocol_reports)
969 return 0;
970 /* If either reports -1 (invalid value), report -1. */
971 if ((git_reports == -1) || (protocol_reports == -1))
972 return -1;
973 /* Otherwise if both report unknown, report unknown. */
974 return 1;
975 }
976
977 void transport_set_verbosity(struct transport *transport, int verbosity,
978 int force_progress)
979 {
980 if (verbosity >= 1)
981 transport->verbose = verbosity <= 3 ? verbosity : 3;
982 if (verbosity < 0)
983 transport->verbose = -1;
984
985 /**
986 * Rules used to determine whether to report progress (processing aborts
987 * when a rule is satisfied):
988 *
989 * . Report progress, if force_progress is 1 (ie. --progress).
990 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
991 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
992 * . Report progress if isatty(2) is 1.
993 **/
994 if (force_progress >= 0)
995 transport->progress = !!force_progress;
996 else
997 transport->progress = verbosity >= 0 && isatty(2);
998 }
999
1000 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1001 {
1002 int i;
1003
1004 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1005 "not be found on any remote:\n"));
1006 for (i = 0; i < needs_pushing->nr; i++)
1007 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1008 fprintf(stderr, _("\nPlease try\n\n"
1009 " git push --recurse-submodules=on-demand\n\n"
1010 "or cd to the path and use\n\n"
1011 " git push\n\n"
1012 "to push them to a remote.\n\n"));
1013
1014 string_list_clear(needs_pushing, 0);
1015
1016 die(_("Aborting."));
1017 }
1018
1019 static int run_pre_push_hook(struct transport *transport,
1020 struct ref *remote_refs)
1021 {
1022 int ret = 0, x;
1023 struct ref *r;
1024 struct child_process proc = CHILD_PROCESS_INIT;
1025 struct strbuf buf;
1026 const char *argv[4];
1027
1028 if (!(argv[0] = find_hook("pre-push")))
1029 return 0;
1030
1031 argv[1] = transport->remote->name;
1032 argv[2] = transport->url;
1033 argv[3] = NULL;
1034
1035 proc.argv = argv;
1036 proc.in = -1;
1037
1038 if (start_command(&proc)) {
1039 finish_command(&proc);
1040 return -1;
1041 }
1042
1043 sigchain_push(SIGPIPE, SIG_IGN);
1044
1045 strbuf_init(&buf, 256);
1046
1047 for (r = remote_refs; r; r = r->next) {
1048 if (!r->peer_ref) continue;
1049 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1050 if (r->status == REF_STATUS_REJECT_STALE) continue;
1051 if (r->status == REF_STATUS_UPTODATE) continue;
1052
1053 strbuf_reset(&buf);
1054 strbuf_addf( &buf, "%s %s %s %s\n",
1055 r->peer_ref->name, oid_to_hex(&r->new_oid),
1056 r->name, oid_to_hex(&r->old_oid));
1057
1058 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1059 /* We do not mind if a hook does not read all refs. */
1060 if (errno != EPIPE)
1061 ret = -1;
1062 break;
1063 }
1064 }
1065
1066 strbuf_release(&buf);
1067
1068 x = close(proc.in);
1069 if (!ret)
1070 ret = x;
1071
1072 sigchain_pop(SIGPIPE);
1073
1074 x = finish_command(&proc);
1075 if (!ret)
1076 ret = x;
1077
1078 return ret;
1079 }
1080
1081 int transport_push(struct transport *transport,
1082 struct refspec *rs, int flags,
1083 unsigned int *reject_reasons)
1084 {
1085 *reject_reasons = 0;
1086
1087 if (transport_color_config() < 0)
1088 return -1;
1089
1090 if (transport->vtable->push_refs) {
1091 struct ref *remote_refs;
1092 struct ref *local_refs = get_local_heads();
1093 int match_flags = MATCH_REFS_NONE;
1094 int verbose = (transport->verbose > 0);
1095 int quiet = (transport->verbose < 0);
1096 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1097 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1098 int push_ret, ret, err;
1099 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1100
1101 if (check_push_refs(local_refs, rs) < 0)
1102 return -1;
1103
1104 refspec_ref_prefixes(rs, &ref_prefixes);
1105
1106 remote_refs = transport->vtable->get_refs_list(transport, 1,
1107 &ref_prefixes);
1108
1109 argv_array_clear(&ref_prefixes);
1110
1111 if (flags & TRANSPORT_PUSH_ALL)
1112 match_flags |= MATCH_REFS_ALL;
1113 if (flags & TRANSPORT_PUSH_MIRROR)
1114 match_flags |= MATCH_REFS_MIRROR;
1115 if (flags & TRANSPORT_PUSH_PRUNE)
1116 match_flags |= MATCH_REFS_PRUNE;
1117 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1118 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1119
1120 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1121 return -1;
1122
1123 if (transport->smart_options &&
1124 transport->smart_options->cas &&
1125 !is_empty_cas(transport->smart_options->cas))
1126 apply_push_cas(transport->smart_options->cas,
1127 transport->remote, remote_refs);
1128
1129 set_ref_status_for_push(remote_refs,
1130 flags & TRANSPORT_PUSH_MIRROR,
1131 flags & TRANSPORT_PUSH_FORCE);
1132
1133 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1134 if (run_pre_push_hook(transport, remote_refs))
1135 return -1;
1136
1137 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1138 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1139 !is_bare_repository()) {
1140 struct ref *ref = remote_refs;
1141 struct oid_array commits = OID_ARRAY_INIT;
1142
1143 for (; ref; ref = ref->next)
1144 if (!is_null_oid(&ref->new_oid))
1145 oid_array_append(&commits,
1146 &ref->new_oid);
1147
1148 if (!push_unpushed_submodules(&commits,
1149 transport->remote,
1150 rs,
1151 transport->push_options,
1152 pretend)) {
1153 oid_array_clear(&commits);
1154 die("Failed to push all needed submodules!");
1155 }
1156 oid_array_clear(&commits);
1157 }
1158
1159 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1160 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1161 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1162 !pretend)) && !is_bare_repository()) {
1163 struct ref *ref = remote_refs;
1164 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1165 struct oid_array commits = OID_ARRAY_INIT;
1166
1167 for (; ref; ref = ref->next)
1168 if (!is_null_oid(&ref->new_oid))
1169 oid_array_append(&commits,
1170 &ref->new_oid);
1171
1172 if (find_unpushed_submodules(&commits, transport->remote->name,
1173 &needs_pushing)) {
1174 oid_array_clear(&commits);
1175 die_with_unpushed_submodules(&needs_pushing);
1176 }
1177 string_list_clear(&needs_pushing, 0);
1178 oid_array_clear(&commits);
1179 }
1180
1181 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1182 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1183 else
1184 push_ret = 0;
1185 err = push_had_errors(remote_refs);
1186 ret = push_ret | err;
1187
1188 if (!quiet || err)
1189 transport_print_push_status(transport->url, remote_refs,
1190 verbose | porcelain, porcelain,
1191 reject_reasons);
1192
1193 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1194 set_upstreams(transport, remote_refs, pretend);
1195
1196 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1197 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1198 struct ref *ref;
1199 for (ref = remote_refs; ref; ref = ref->next)
1200 transport_update_tracking_ref(transport->remote, ref, verbose);
1201 }
1202
1203 if (porcelain && !push_ret)
1204 puts("Done");
1205 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1206 fprintf(stderr, "Everything up-to-date\n");
1207
1208 return ret;
1209 }
1210 return 1;
1211 }
1212
1213 const struct ref *transport_get_remote_refs(struct transport *transport,
1214 const struct argv_array *ref_prefixes)
1215 {
1216 if (!transport->got_remote_refs) {
1217 transport->remote_refs =
1218 transport->vtable->get_refs_list(transport, 0,
1219 ref_prefixes);
1220 transport->got_remote_refs = 1;
1221 }
1222
1223 return transport->remote_refs;
1224 }
1225
1226 int transport_fetch_refs(struct transport *transport, struct ref *refs,
1227 struct ref **fetched_refs)
1228 {
1229 int rc;
1230 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1231 struct ref **heads = NULL;
1232 struct ref *nop_head = NULL, **nop_tail = &nop_head;
1233 struct ref *rm;
1234
1235 for (rm = refs; rm; rm = rm->next) {
1236 nr_refs++;
1237 if (rm->peer_ref &&
1238 !is_null_oid(&rm->old_oid) &&
1239 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid)) {
1240 /*
1241 * These need to be reported as fetched, but we don't
1242 * actually need to fetch them.
1243 */
1244 if (fetched_refs) {
1245 struct ref *nop_ref = copy_ref(rm);
1246 *nop_tail = nop_ref;
1247 nop_tail = &nop_ref->next;
1248 }
1249 continue;
1250 }
1251 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1252 heads[nr_heads++] = rm;
1253 }
1254
1255 if (!nr_heads) {
1256 /*
1257 * When deepening of a shallow repository is requested,
1258 * then local and remote refs are likely to still be equal.
1259 * Just feed them all to the fetch method in that case.
1260 * This condition shouldn't be met in a non-deepening fetch
1261 * (see builtin/fetch.c:quickfetch()).
1262 */
1263 ALLOC_ARRAY(heads, nr_refs);
1264 for (rm = refs; rm; rm = rm->next)
1265 heads[nr_heads++] = rm;
1266 }
1267
1268 rc = transport->vtable->fetch(transport, nr_heads, heads, fetched_refs);
1269 if (fetched_refs && nop_head) {
1270 *nop_tail = *fetched_refs;
1271 *fetched_refs = nop_head;
1272 }
1273
1274 free(heads);
1275 return rc;
1276 }
1277
1278 void transport_unlock_pack(struct transport *transport)
1279 {
1280 if (transport->pack_lockfile) {
1281 unlink_or_warn(transport->pack_lockfile);
1282 FREE_AND_NULL(transport->pack_lockfile);
1283 }
1284 }
1285
1286 int transport_connect(struct transport *transport, const char *name,
1287 const char *exec, int fd[2])
1288 {
1289 if (transport->vtable->connect)
1290 return transport->vtable->connect(transport, name, exec, fd);
1291 else
1292 die("Operation not supported by protocol");
1293 }
1294
1295 int transport_disconnect(struct transport *transport)
1296 {
1297 int ret = 0;
1298 if (transport->vtable->disconnect)
1299 ret = transport->vtable->disconnect(transport);
1300 free(transport);
1301 return ret;
1302 }
1303
1304 /*
1305 * Strip username (and password) from a URL and return
1306 * it in a newly allocated string.
1307 */
1308 char *transport_anonymize_url(const char *url)
1309 {
1310 char *scheme_prefix, *anon_part;
1311 size_t anon_len, prefix_len = 0;
1312
1313 anon_part = strchr(url, '@');
1314 if (url_is_local_not_ssh(url) || !anon_part)
1315 goto literal_copy;
1316
1317 anon_len = strlen(++anon_part);
1318 scheme_prefix = strstr(url, "://");
1319 if (!scheme_prefix) {
1320 if (!strchr(anon_part, ':'))
1321 /* cannot be "me@there:/path/name" */
1322 goto literal_copy;
1323 } else {
1324 const char *cp;
1325 /* make sure scheme is reasonable */
1326 for (cp = url; cp < scheme_prefix; cp++) {
1327 switch (*cp) {
1328 /* RFC 1738 2.1 */
1329 case '+': case '.': case '-':
1330 break; /* ok */
1331 default:
1332 if (isalnum(*cp))
1333 break;
1334 /* it isn't */
1335 goto literal_copy;
1336 }
1337 }
1338 /* @ past the first slash does not count */
1339 cp = strchr(scheme_prefix + 3, '/');
1340 if (cp && cp < anon_part)
1341 goto literal_copy;
1342 prefix_len = scheme_prefix - url + 3;
1343 }
1344 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1345 (int)anon_len, anon_part);
1346 literal_copy:
1347 return xstrdup(url);
1348 }
1349
1350 static void read_alternate_refs(const char *path,
1351 alternate_ref_fn *cb,
1352 void *data)
1353 {
1354 struct child_process cmd = CHILD_PROCESS_INIT;
1355 struct strbuf line = STRBUF_INIT;
1356 FILE *fh;
1357
1358 cmd.git_cmd = 1;
1359 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1360 argv_array_push(&cmd.args, "for-each-ref");
1361 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1362 cmd.env = local_repo_env;
1363 cmd.out = -1;
1364
1365 if (start_command(&cmd))
1366 return;
1367
1368 fh = xfdopen(cmd.out, "r");
1369 while (strbuf_getline_lf(&line, fh) != EOF) {
1370 struct object_id oid;
1371
1372 if (get_oid_hex(line.buf, &oid) ||
1373 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1374 warning("invalid line while parsing alternate refs: %s",
1375 line.buf);
1376 break;
1377 }
1378
1379 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1380 }
1381
1382 fclose(fh);
1383 finish_command(&cmd);
1384 }
1385
1386 struct alternate_refs_data {
1387 alternate_ref_fn *fn;
1388 void *data;
1389 };
1390
1391 static int refs_from_alternate_cb(struct alternate_object_database *e,
1392 void *data)
1393 {
1394 struct strbuf path = STRBUF_INIT;
1395 size_t base_len;
1396 struct alternate_refs_data *cb = data;
1397
1398 if (!strbuf_realpath(&path, e->path, 0))
1399 goto out;
1400 if (!strbuf_strip_suffix(&path, "/objects"))
1401 goto out;
1402 base_len = path.len;
1403
1404 /* Is this a git repository with refs? */
1405 strbuf_addstr(&path, "/refs");
1406 if (!is_directory(path.buf))
1407 goto out;
1408 strbuf_setlen(&path, base_len);
1409
1410 read_alternate_refs(path.buf, cb->fn, cb->data);
1411
1412 out:
1413 strbuf_release(&path);
1414 return 0;
1415 }
1416
1417 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1418 {
1419 struct alternate_refs_data cb;
1420 cb.fn = fn;
1421 cb.data = data;
1422 foreach_alt_odb(refs_from_alternate_cb, &cb);
1423 }
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