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repository: use FREE_AND_NULL
[git.git] / transport.c
blobfb8c01e57a99f35f63690c536e3f623d3695b1de
1 #include "cache.h"
2 #include "config.h"
3 #include "transport.h"
4 #include "run-command.h"
5 #include "pkt-line.h"
6 #include "fetch-pack.h"
7 #include "remote.h"
8 #include "connect.h"
9 #include "send-pack.h"
10 #include "walker.h"
11 #include "bundle.h"
12 #include "dir.h"
13 #include "refs.h"
14 #include "branch.h"
15 #include "url.h"
16 #include "submodule.h"
17 #include "string-list.h"
18 #include "sha1-array.h"
19 #include "sigchain.h"
20
21 static void set_upstreams(struct transport *transport, struct ref *refs,
22 int pretend)
23 {
24 struct ref *ref;
25 for (ref = refs; ref; ref = ref->next) {
26 const char *localname;
27 const char *tmp;
28 const char *remotename;
29 int flag = 0;
30 /*
31 * Check suitability for tracking. Must be successful /
32 * already up-to-date ref create/modify (not delete).
33 */
34 if (ref->status != REF_STATUS_OK &&
35 ref->status != REF_STATUS_UPTODATE)
36 continue;
37 if (!ref->peer_ref)
38 continue;
39 if (is_null_oid(&ref->new_oid))
40 continue;
41
42 /* Follow symbolic refs (mainly for HEAD). */
43 localname = ref->peer_ref->name;
44 remotename = ref->name;
45 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
46 NULL, &flag);
47 if (tmp && flag & REF_ISSYMREF &&
48 starts_with(tmp, "refs/heads/"))
49 localname = tmp;
50
51 /* Both source and destination must be local branches. */
52 if (!localname || !starts_with(localname, "refs/heads/"))
53 continue;
54 if (!remotename || !starts_with(remotename, "refs/heads/"))
55 continue;
56
57 if (!pretend)
58 install_branch_config(BRANCH_CONFIG_VERBOSE,
59 localname + 11, transport->remote->name,
60 remotename);
61 else
62 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
63 localname + 11, remotename + 11,
64 transport->remote->name);
65 }
66 }
67
68 struct bundle_transport_data {
69 int fd;
70 struct bundle_header header;
71 };
72
73 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
74 {
75 struct bundle_transport_data *data = transport->data;
76 struct ref *result = NULL;
77 int i;
78
79 if (for_push)
80 return NULL;
81
82 if (data->fd > 0)
83 close(data->fd);
84 data->fd = read_bundle_header(transport->url, &data->header);
85 if (data->fd < 0)
86 die ("Could not read bundle '%s'.", transport->url);
87 for (i = 0; i < data->header.references.nr; i++) {
88 struct ref_list_entry *e = data->header.references.list + i;
89 struct ref *ref = alloc_ref(e->name);
90 oidcpy(&ref->old_oid, &e->oid);
91 ref->next = result;
92 result = ref;
93 }
94 return result;
95 }
96
97 static int fetch_refs_from_bundle(struct transport *transport,
98 int nr_heads, struct ref **to_fetch)
99 {
100 struct bundle_transport_data *data = transport->data;
101 return unbundle(&data->header, data->fd,
102 transport->progress ? BUNDLE_VERBOSE : 0);
103 }
104
105 static int close_bundle(struct transport *transport)
106 {
107 struct bundle_transport_data *data = transport->data;
108 if (data->fd > 0)
109 close(data->fd);
110 free(data);
111 return 0;
112 }
113
114 struct git_transport_data {
115 struct git_transport_options options;
116 struct child_process *conn;
117 int fd[2];
118 unsigned got_remote_heads : 1;
119 struct oid_array extra_have;
120 struct oid_array shallow;
121 };
122
123 static int set_git_option(struct git_transport_options *opts,
124 const char *name, const char *value)
125 {
126 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
127 opts->uploadpack = value;
128 return 0;
129 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
130 opts->receivepack = value;
131 return 0;
132 } else if (!strcmp(name, TRANS_OPT_THIN)) {
133 opts->thin = !!value;
134 return 0;
135 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
136 opts->followtags = !!value;
137 return 0;
138 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
139 opts->keep = !!value;
140 return 0;
141 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
142 opts->update_shallow = !!value;
143 return 0;
144 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
145 if (!value)
146 opts->depth = 0;
147 else {
148 char *end;
149 opts->depth = strtol(value, &end, 0);
150 if (*end)
151 die(_("transport: invalid depth option '%s'"), value);
152 }
153 return 0;
154 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
155 opts->deepen_since = value;
156 return 0;
157 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
158 opts->deepen_not = (const struct string_list *)value;
159 return 0;
160 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
161 opts->deepen_relative = !!value;
162 return 0;
163 }
164 return 1;
165 }
166
167 static int connect_setup(struct transport *transport, int for_push)
168 {
169 struct git_transport_data *data = transport->data;
170 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
171
172 if (data->conn)
173 return 0;
174
175 switch (transport->family) {
176 case TRANSPORT_FAMILY_ALL: break;
177 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
178 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
179 }
180
181 data->conn = git_connect(data->fd, transport->url,
182 for_push ? data->options.receivepack :
183 data->options.uploadpack,
184 flags);
185
186 return 0;
187 }
188
189 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
190 {
191 struct git_transport_data *data = transport->data;
192 struct ref *refs;
193
194 connect_setup(transport, for_push);
195 get_remote_heads(data->fd[0], NULL, 0, &refs,
196 for_push ? REF_NORMAL : 0,
197 &data->extra_have,
198 &data->shallow);
199 data->got_remote_heads = 1;
200
201 return refs;
202 }
203
204 static int fetch_refs_via_pack(struct transport *transport,
205 int nr_heads, struct ref **to_fetch)
206 {
207 int ret = 0;
208 struct git_transport_data *data = transport->data;
209 struct ref *refs;
210 char *dest = xstrdup(transport->url);
211 struct fetch_pack_args args;
212 struct ref *refs_tmp = NULL;
213
214 memset(&args, 0, sizeof(args));
215 args.uploadpack = data->options.uploadpack;
216 args.keep_pack = data->options.keep;
217 args.lock_pack = 1;
218 args.use_thin_pack = data->options.thin;
219 args.include_tag = data->options.followtags;
220 args.verbose = (transport->verbose > 1);
221 args.quiet = (transport->verbose < 0);
222 args.no_progress = !transport->progress;
223 args.depth = data->options.depth;
224 args.deepen_since = data->options.deepen_since;
225 args.deepen_not = data->options.deepen_not;
226 args.deepen_relative = data->options.deepen_relative;
227 args.check_self_contained_and_connected =
228 data->options.check_self_contained_and_connected;
229 args.cloning = transport->cloning;
230 args.update_shallow = data->options.update_shallow;
231
232 if (!data->got_remote_heads) {
233 connect_setup(transport, 0);
234 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
235 NULL, &data->shallow);
236 data->got_remote_heads = 1;
237 }
238
239 refs = fetch_pack(&args, data->fd, data->conn,
240 refs_tmp ? refs_tmp : transport->remote_refs,
241 dest, to_fetch, nr_heads, &data->shallow,
242 &transport->pack_lockfile);
243 close(data->fd[0]);
244 close(data->fd[1]);
245 if (finish_connect(data->conn))
246 ret = -1;
247 data->conn = NULL;
248 data->got_remote_heads = 0;
249 data->options.self_contained_and_connected =
250 args.self_contained_and_connected;
251
252 if (refs == NULL)
253 ret = -1;
254 if (report_unmatched_refs(to_fetch, nr_heads))
255 ret = -1;
256
257 free_refs(refs_tmp);
258 free_refs(refs);
259 free(dest);
260 return ret;
261 }
262
263 static int push_had_errors(struct ref *ref)
264 {
265 for (; ref; ref = ref->next) {
266 switch (ref->status) {
267 case REF_STATUS_NONE:
268 case REF_STATUS_UPTODATE:
269 case REF_STATUS_OK:
270 break;
271 default:
272 return 1;
273 }
274 }
275 return 0;
276 }
277
278 int transport_refs_pushed(struct ref *ref)
279 {
280 for (; ref; ref = ref->next) {
281 switch(ref->status) {
282 case REF_STATUS_NONE:
283 case REF_STATUS_UPTODATE:
284 break;
285 default:
286 return 1;
287 }
288 }
289 return 0;
290 }
291
292 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
293 {
294 struct refspec rs;
295
296 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
297 return;
298
299 rs.src = ref->name;
300 rs.dst = NULL;
301
302 if (!remote_find_tracking(remote, &rs)) {
303 if (verbose)
304 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
305 if (ref->deletion) {
306 delete_ref(NULL, rs.dst, NULL, 0);
307 } else
308 update_ref("update by push", rs.dst,
309 ref->new_oid.hash, NULL, 0, 0);
310 free(rs.dst);
311 }
312 }
313
314 static void print_ref_status(char flag, const char *summary,
315 struct ref *to, struct ref *from, const char *msg,
316 int porcelain, int summary_width)
317 {
318 if (porcelain) {
319 if (from)
320 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
321 else
322 fprintf(stdout, "%c\t:%s\t", flag, to->name);
323 if (msg)
324 fprintf(stdout, "%s (%s)\n", summary, msg);
325 else
326 fprintf(stdout, "%s\n", summary);
327 } else {
328 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
329 if (from)
330 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
331 else
332 fputs(prettify_refname(to->name), stderr);
333 if (msg) {
334 fputs(" (", stderr);
335 fputs(msg, stderr);
336 fputc(')', stderr);
337 }
338 fputc('\n', stderr);
339 }
340 }
341
342 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
343 {
344 if (ref->deletion)
345 print_ref_status('-', "[deleted]", ref, NULL, NULL,
346 porcelain, summary_width);
347 else if (is_null_oid(&ref->old_oid))
348 print_ref_status('*',
349 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
350 "[new branch]"),
351 ref, ref->peer_ref, NULL, porcelain, summary_width);
352 else {
353 struct strbuf quickref = STRBUF_INIT;
354 char type;
355 const char *msg;
356
357 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
358 DEFAULT_ABBREV);
359 if (ref->forced_update) {
360 strbuf_addstr(&quickref, "...");
361 type = '+';
362 msg = "forced update";
363 } else {
364 strbuf_addstr(&quickref, "..");
365 type = ' ';
366 msg = NULL;
367 }
368 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
369 DEFAULT_ABBREV);
370
371 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
372 porcelain, summary_width);
373 strbuf_release(&quickref);
374 }
375 }
376
377 static int print_one_push_status(struct ref *ref, const char *dest, int count,
378 int porcelain, int summary_width)
379 {
380 if (!count) {
381 char *url = transport_anonymize_url(dest);
382 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
383 free(url);
384 }
385
386 switch(ref->status) {
387 case REF_STATUS_NONE:
388 print_ref_status('X', "[no match]", ref, NULL, NULL,
389 porcelain, summary_width);
390 break;
391 case REF_STATUS_REJECT_NODELETE:
392 print_ref_status('!', "[rejected]", ref, NULL,
393 "remote does not support deleting refs",
394 porcelain, summary_width);
395 break;
396 case REF_STATUS_UPTODATE:
397 print_ref_status('=', "[up to date]", ref,
398 ref->peer_ref, NULL, porcelain, summary_width);
399 break;
400 case REF_STATUS_REJECT_NONFASTFORWARD:
401 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
402 "non-fast-forward", porcelain, summary_width);
403 break;
404 case REF_STATUS_REJECT_ALREADY_EXISTS:
405 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
406 "already exists", porcelain, summary_width);
407 break;
408 case REF_STATUS_REJECT_FETCH_FIRST:
409 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
410 "fetch first", porcelain, summary_width);
411 break;
412 case REF_STATUS_REJECT_NEEDS_FORCE:
413 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
414 "needs force", porcelain, summary_width);
415 break;
416 case REF_STATUS_REJECT_STALE:
417 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
418 "stale info", porcelain, summary_width);
419 break;
420 case REF_STATUS_REJECT_SHALLOW:
421 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
422 "new shallow roots not allowed",
423 porcelain, summary_width);
424 break;
425 case REF_STATUS_REMOTE_REJECT:
426 print_ref_status('!', "[remote rejected]", ref,
427 ref->deletion ? NULL : ref->peer_ref,
428 ref->remote_status, porcelain, summary_width);
429 break;
430 case REF_STATUS_EXPECTING_REPORT:
431 print_ref_status('!', "[remote failure]", ref,
432 ref->deletion ? NULL : ref->peer_ref,
433 "remote failed to report status",
434 porcelain, summary_width);
435 break;
436 case REF_STATUS_ATOMIC_PUSH_FAILED:
437 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
438 "atomic push failed", porcelain, summary_width);
439 break;
440 case REF_STATUS_OK:
441 print_ok_ref_status(ref, porcelain, summary_width);
442 break;
443 }
444
445 return 1;
446 }
447
448 static int measure_abbrev(const struct object_id *oid, int sofar)
449 {
450 char hex[GIT_MAX_HEXSZ + 1];
451 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
452
453 return (w < sofar) ? sofar : w;
454 }
455
456 int transport_summary_width(const struct ref *refs)
457 {
458 int maxw = -1;
459
460 for (; refs; refs = refs->next) {
461 maxw = measure_abbrev(&refs->old_oid, maxw);
462 maxw = measure_abbrev(&refs->new_oid, maxw);
463 }
464 if (maxw < 0)
465 maxw = FALLBACK_DEFAULT_ABBREV;
466 return (2 * maxw + 3);
467 }
468
469 void transport_print_push_status(const char *dest, struct ref *refs,
470 int verbose, int porcelain, unsigned int *reject_reasons)
471 {
472 struct ref *ref;
473 int n = 0;
474 struct object_id head_oid;
475 char *head;
476 int summary_width = transport_summary_width(refs);
477
478 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL);
479
480 if (verbose) {
481 for (ref = refs; ref; ref = ref->next)
482 if (ref->status == REF_STATUS_UPTODATE)
483 n += print_one_push_status(ref, dest, n,
484 porcelain, summary_width);
485 }
486
487 for (ref = refs; ref; ref = ref->next)
488 if (ref->status == REF_STATUS_OK)
489 n += print_one_push_status(ref, dest, n,
490 porcelain, summary_width);
491
492 *reject_reasons = 0;
493 for (ref = refs; ref; ref = ref->next) {
494 if (ref->status != REF_STATUS_NONE &&
495 ref->status != REF_STATUS_UPTODATE &&
496 ref->status != REF_STATUS_OK)
497 n += print_one_push_status(ref, dest, n,
498 porcelain, summary_width);
499 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
500 if (head != NULL && !strcmp(head, ref->name))
501 *reject_reasons |= REJECT_NON_FF_HEAD;
502 else
503 *reject_reasons |= REJECT_NON_FF_OTHER;
504 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
505 *reject_reasons |= REJECT_ALREADY_EXISTS;
506 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
507 *reject_reasons |= REJECT_FETCH_FIRST;
508 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
509 *reject_reasons |= REJECT_NEEDS_FORCE;
510 }
511 }
512 free(head);
513 }
514
515 void transport_verify_remote_names(int nr_heads, const char **heads)
516 {
517 int i;
518
519 for (i = 0; i < nr_heads; i++) {
520 const char *local = heads[i];
521 const char *remote = strrchr(heads[i], ':');
522
523 if (*local == '+')
524 local++;
525
526 /* A matching refspec is okay. */
527 if (remote == local && remote[1] == '\0')
528 continue;
529
530 remote = remote ? (remote + 1) : local;
531 if (check_refname_format(remote,
532 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
533 die("remote part of refspec is not a valid name in %s",
534 heads[i]);
535 }
536 }
537
538 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
539 {
540 struct git_transport_data *data = transport->data;
541 struct send_pack_args args;
542 int ret;
543
544 if (!data->got_remote_heads) {
545 struct ref *tmp_refs;
546 connect_setup(transport, 1);
547
548 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
549 NULL, &data->shallow);
550 data->got_remote_heads = 1;
551 }
552
553 memset(&args, 0, sizeof(args));
554 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
555 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
556 args.use_thin_pack = data->options.thin;
557 args.verbose = (transport->verbose > 0);
558 args.quiet = (transport->verbose < 0);
559 args.progress = transport->progress;
560 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
561 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
562 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
563 args.push_options = transport->push_options;
564 args.url = transport->url;
565
566 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
567 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
568 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
569 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
570 else
571 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
572
573 ret = send_pack(&args, data->fd, data->conn, remote_refs,
574 &data->extra_have);
575
576 close(data->fd[1]);
577 close(data->fd[0]);
578 ret |= finish_connect(data->conn);
579 data->conn = NULL;
580 data->got_remote_heads = 0;
581
582 return ret;
583 }
584
585 static int connect_git(struct transport *transport, const char *name,
586 const char *executable, int fd[2])
587 {
588 struct git_transport_data *data = transport->data;
589 data->conn = git_connect(data->fd, transport->url,
590 executable, 0);
591 fd[0] = data->fd[0];
592 fd[1] = data->fd[1];
593 return 0;
594 }
595
596 static int disconnect_git(struct transport *transport)
597 {
598 struct git_transport_data *data = transport->data;
599 if (data->conn) {
600 if (data->got_remote_heads)
601 packet_flush(data->fd[1]);
602 close(data->fd[0]);
603 close(data->fd[1]);
604 finish_connect(data->conn);
605 }
606
607 free(data);
608 return 0;
609 }
610
611 void transport_take_over(struct transport *transport,
612 struct child_process *child)
613 {
614 struct git_transport_data *data;
615
616 if (!transport->smart_options)
617 die("BUG: taking over transport requires non-NULL "
618 "smart_options field.");
619
620 data = xcalloc(1, sizeof(*data));
621 data->options = *transport->smart_options;
622 data->conn = child;
623 data->fd[0] = data->conn->out;
624 data->fd[1] = data->conn->in;
625 data->got_remote_heads = 0;
626 transport->data = data;
627
628 transport->set_option = NULL;
629 transport->get_refs_list = get_refs_via_connect;
630 transport->fetch = fetch_refs_via_pack;
631 transport->push = NULL;
632 transport->push_refs = git_transport_push;
633 transport->disconnect = disconnect_git;
634 transport->smart_options = &(data->options);
635
636 transport->cannot_reuse = 1;
637 }
638
639 static int is_file(const char *url)
640 {
641 struct stat buf;
642 if (stat(url, &buf))
643 return 0;
644 return S_ISREG(buf.st_mode);
645 }
646
647 static int external_specification_len(const char *url)
648 {
649 return strchr(url, ':') - url;
650 }
651
652 static const struct string_list *protocol_whitelist(void)
653 {
654 static int enabled = -1;
655 static struct string_list allowed = STRING_LIST_INIT_DUP;
656
657 if (enabled < 0) {
658 const char *v = getenv("GIT_ALLOW_PROTOCOL");
659 if (v) {
660 string_list_split(&allowed, v, ':', -1);
661 string_list_sort(&allowed);
662 enabled = 1;
663 } else {
664 enabled = 0;
665 }
666 }
667
668 return enabled ? &allowed : NULL;
669 }
670
671 enum protocol_allow_config {
672 PROTOCOL_ALLOW_NEVER = 0,
673 PROTOCOL_ALLOW_USER_ONLY,
674 PROTOCOL_ALLOW_ALWAYS
675 };
676
677 static enum protocol_allow_config parse_protocol_config(const char *key,
678 const char *value)
679 {
680 if (!strcasecmp(value, "always"))
681 return PROTOCOL_ALLOW_ALWAYS;
682 else if (!strcasecmp(value, "never"))
683 return PROTOCOL_ALLOW_NEVER;
684 else if (!strcasecmp(value, "user"))
685 return PROTOCOL_ALLOW_USER_ONLY;
686
687 die("unknown value for config '%s': %s", key, value);
688 }
689
690 static enum protocol_allow_config get_protocol_config(const char *type)
691 {
692 char *key = xstrfmt("protocol.%s.allow", type);
693 char *value;
694
695 /* first check the per-protocol config */
696 if (!git_config_get_string(key, &value)) {
697 enum protocol_allow_config ret =
698 parse_protocol_config(key, value);
699 free(key);
700 free(value);
701 return ret;
702 }
703 free(key);
704
705 /* if defined, fallback to user-defined default for unknown protocols */
706 if (!git_config_get_string("protocol.allow", &value)) {
707 enum protocol_allow_config ret =
708 parse_protocol_config("protocol.allow", value);
709 free(value);
710 return ret;
711 }
712
713 /* fallback to built-in defaults */
714 /* known safe */
715 if (!strcmp(type, "http") ||
716 !strcmp(type, "https") ||
717 !strcmp(type, "git") ||
718 !strcmp(type, "ssh") ||
719 !strcmp(type, "file"))
720 return PROTOCOL_ALLOW_ALWAYS;
721
722 /* known scary; err on the side of caution */
723 if (!strcmp(type, "ext"))
724 return PROTOCOL_ALLOW_NEVER;
725
726 /* unknown; by default let them be used only directly by the user */
727 return PROTOCOL_ALLOW_USER_ONLY;
728 }
729
730 int is_transport_allowed(const char *type, int from_user)
731 {
732 const struct string_list *whitelist = protocol_whitelist();
733 if (whitelist)
734 return string_list_has_string(whitelist, type);
735
736 switch (get_protocol_config(type)) {
737 case PROTOCOL_ALLOW_ALWAYS:
738 return 1;
739 case PROTOCOL_ALLOW_NEVER:
740 return 0;
741 case PROTOCOL_ALLOW_USER_ONLY:
742 if (from_user < 0)
743 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
744 return from_user;
745 }
746
747 die("BUG: invalid protocol_allow_config type");
748 }
749
750 void transport_check_allowed(const char *type)
751 {
752 if (!is_transport_allowed(type, -1))
753 die("transport '%s' not allowed", type);
754 }
755
756 struct transport *transport_get(struct remote *remote, const char *url)
757 {
758 const char *helper;
759 struct transport *ret = xcalloc(1, sizeof(*ret));
760
761 ret->progress = isatty(2);
762
763 if (!remote)
764 die("No remote provided to transport_get()");
765
766 ret->got_remote_refs = 0;
767 ret->remote = remote;
768 helper = remote->foreign_vcs;
769
770 if (!url && remote->url)
771 url = remote->url[0];
772 ret->url = url;
773
774 /* maybe it is a foreign URL? */
775 if (url) {
776 const char *p = url;
777
778 while (is_urlschemechar(p == url, *p))
779 p++;
780 if (starts_with(p, "::"))
781 helper = xstrndup(url, p - url);
782 }
783
784 if (helper) {
785 transport_helper_init(ret, helper);
786 } else if (starts_with(url, "rsync:")) {
787 die("git-over-rsync is no longer supported");
788 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
789 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
790 transport_check_allowed("file");
791 ret->data = data;
792 ret->get_refs_list = get_refs_from_bundle;
793 ret->fetch = fetch_refs_from_bundle;
794 ret->disconnect = close_bundle;
795 ret->smart_options = NULL;
796 } else if (!is_url(url)
797 || starts_with(url, "file://")
798 || starts_with(url, "git://")
799 || starts_with(url, "ssh://")
800 || starts_with(url, "git+ssh://") /* deprecated - do not use */
801 || starts_with(url, "ssh+git://") /* deprecated - do not use */
802 ) {
803 /*
804 * These are builtin smart transports; "allowed" transports
805 * will be checked individually in git_connect.
806 */
807 struct git_transport_data *data = xcalloc(1, sizeof(*data));
808 ret->data = data;
809 ret->set_option = NULL;
810 ret->get_refs_list = get_refs_via_connect;
811 ret->fetch = fetch_refs_via_pack;
812 ret->push_refs = git_transport_push;
813 ret->connect = connect_git;
814 ret->disconnect = disconnect_git;
815 ret->smart_options = &(data->options);
816
817 data->conn = NULL;
818 data->got_remote_heads = 0;
819 } else {
820 /* Unknown protocol in URL. Pass to external handler. */
821 int len = external_specification_len(url);
822 char *handler = xmemdupz(url, len);
823 transport_helper_init(ret, handler);
824 }
825
826 if (ret->smart_options) {
827 ret->smart_options->thin = 1;
828 ret->smart_options->uploadpack = "git-upload-pack";
829 if (remote->uploadpack)
830 ret->smart_options->uploadpack = remote->uploadpack;
831 ret->smart_options->receivepack = "git-receive-pack";
832 if (remote->receivepack)
833 ret->smart_options->receivepack = remote->receivepack;
834 }
835
836 return ret;
837 }
838
839 int transport_set_option(struct transport *transport,
840 const char *name, const char *value)
841 {
842 int git_reports = 1, protocol_reports = 1;
843
844 if (transport->smart_options)
845 git_reports = set_git_option(transport->smart_options,
846 name, value);
847
848 if (transport->set_option)
849 protocol_reports = transport->set_option(transport, name,
850 value);
851
852 /* If either report is 0, report 0 (success). */
853 if (!git_reports || !protocol_reports)
854 return 0;
855 /* If either reports -1 (invalid value), report -1. */
856 if ((git_reports == -1) || (protocol_reports == -1))
857 return -1;
858 /* Otherwise if both report unknown, report unknown. */
859 return 1;
860 }
861
862 void transport_set_verbosity(struct transport *transport, int verbosity,
863 int force_progress)
864 {
865 if (verbosity >= 1)
866 transport->verbose = verbosity <= 3 ? verbosity : 3;
867 if (verbosity < 0)
868 transport->verbose = -1;
869
870 /**
871 * Rules used to determine whether to report progress (processing aborts
872 * when a rule is satisfied):
873 *
874 * . Report progress, if force_progress is 1 (ie. --progress).
875 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
876 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
877 * . Report progress if isatty(2) is 1.
878 **/
879 if (force_progress >= 0)
880 transport->progress = !!force_progress;
881 else
882 transport->progress = verbosity >= 0 && isatty(2);
883 }
884
885 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
886 {
887 int i;
888
889 fprintf(stderr, _("The following submodule paths contain changes that can\n"
890 "not be found on any remote:\n"));
891 for (i = 0; i < needs_pushing->nr; i++)
892 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
893 fprintf(stderr, _("\nPlease try\n\n"
894 " git push --recurse-submodules=on-demand\n\n"
895 "or cd to the path and use\n\n"
896 " git push\n\n"
897 "to push them to a remote.\n\n"));
898
899 string_list_clear(needs_pushing, 0);
900
901 die(_("Aborting."));
902 }
903
904 static int run_pre_push_hook(struct transport *transport,
905 struct ref *remote_refs)
906 {
907 int ret = 0, x;
908 struct ref *r;
909 struct child_process proc = CHILD_PROCESS_INIT;
910 struct strbuf buf;
911 const char *argv[4];
912
913 if (!(argv[0] = find_hook("pre-push")))
914 return 0;
915
916 argv[1] = transport->remote->name;
917 argv[2] = transport->url;
918 argv[3] = NULL;
919
920 proc.argv = argv;
921 proc.in = -1;
922
923 if (start_command(&proc)) {
924 finish_command(&proc);
925 return -1;
926 }
927
928 sigchain_push(SIGPIPE, SIG_IGN);
929
930 strbuf_init(&buf, 256);
931
932 for (r = remote_refs; r; r = r->next) {
933 if (!r->peer_ref) continue;
934 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
935 if (r->status == REF_STATUS_REJECT_STALE) continue;
936 if (r->status == REF_STATUS_UPTODATE) continue;
937
938 strbuf_reset(&buf);
939 strbuf_addf( &buf, "%s %s %s %s\n",
940 r->peer_ref->name, oid_to_hex(&r->new_oid),
941 r->name, oid_to_hex(&r->old_oid));
942
943 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
944 /* We do not mind if a hook does not read all refs. */
945 if (errno != EPIPE)
946 ret = -1;
947 break;
948 }
949 }
950
951 strbuf_release(&buf);
952
953 x = close(proc.in);
954 if (!ret)
955 ret = x;
956
957 sigchain_pop(SIGPIPE);
958
959 x = finish_command(&proc);
960 if (!ret)
961 ret = x;
962
963 return ret;
964 }
965
966 int transport_push(struct transport *transport,
967 int refspec_nr, const char **refspec, int flags,
968 unsigned int *reject_reasons)
969 {
970 *reject_reasons = 0;
971 transport_verify_remote_names(refspec_nr, refspec);
972
973 if (transport->push) {
974 /* Maybe FIXME. But no important transport uses this case. */
975 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
976 die("This transport does not support using --set-upstream");
977
978 return transport->push(transport, refspec_nr, refspec, flags);
979 } else if (transport->push_refs) {
980 struct ref *remote_refs;
981 struct ref *local_refs = get_local_heads();
982 int match_flags = MATCH_REFS_NONE;
983 int verbose = (transport->verbose > 0);
984 int quiet = (transport->verbose < 0);
985 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
986 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
987 int push_ret, ret, err;
988
989 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
990 return -1;
991
992 remote_refs = transport->get_refs_list(transport, 1);
993
994 if (flags & TRANSPORT_PUSH_ALL)
995 match_flags |= MATCH_REFS_ALL;
996 if (flags & TRANSPORT_PUSH_MIRROR)
997 match_flags |= MATCH_REFS_MIRROR;
998 if (flags & TRANSPORT_PUSH_PRUNE)
999 match_flags |= MATCH_REFS_PRUNE;
1000 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1001 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1002
1003 if (match_push_refs(local_refs, &remote_refs,
1004 refspec_nr, refspec, match_flags)) {
1005 return -1;
1006 }
1007
1008 if (transport->smart_options &&
1009 transport->smart_options->cas &&
1010 !is_empty_cas(transport->smart_options->cas))
1011 apply_push_cas(transport->smart_options->cas,
1012 transport->remote, remote_refs);
1013
1014 set_ref_status_for_push(remote_refs,
1015 flags & TRANSPORT_PUSH_MIRROR,
1016 flags & TRANSPORT_PUSH_FORCE);
1017
1018 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1019 if (run_pre_push_hook(transport, remote_refs))
1020 return -1;
1021
1022 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1023 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1024 !is_bare_repository()) {
1025 struct ref *ref = remote_refs;
1026 struct oid_array commits = OID_ARRAY_INIT;
1027
1028 for (; ref; ref = ref->next)
1029 if (!is_null_oid(&ref->new_oid))
1030 oid_array_append(&commits,
1031 &ref->new_oid);
1032
1033 if (!push_unpushed_submodules(&commits,
1034 transport->remote,
1035 refspec, refspec_nr,
1036 transport->push_options,
1037 pretend)) {
1038 oid_array_clear(&commits);
1039 die("Failed to push all needed submodules!");
1040 }
1041 oid_array_clear(&commits);
1042 }
1043
1044 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1045 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1046 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1047 !pretend)) && !is_bare_repository()) {
1048 struct ref *ref = remote_refs;
1049 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1050 struct oid_array commits = OID_ARRAY_INIT;
1051
1052 for (; ref; ref = ref->next)
1053 if (!is_null_oid(&ref->new_oid))
1054 oid_array_append(&commits,
1055 &ref->new_oid);
1056
1057 if (find_unpushed_submodules(&commits, transport->remote->name,
1058 &needs_pushing)) {
1059 oid_array_clear(&commits);
1060 die_with_unpushed_submodules(&needs_pushing);
1061 }
1062 string_list_clear(&needs_pushing, 0);
1063 oid_array_clear(&commits);
1064 }
1065
1066 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1067 push_ret = transport->push_refs(transport, remote_refs, flags);
1068 else
1069 push_ret = 0;
1070 err = push_had_errors(remote_refs);
1071 ret = push_ret | err;
1072
1073 if (!quiet || err)
1074 transport_print_push_status(transport->url, remote_refs,
1075 verbose | porcelain, porcelain,
1076 reject_reasons);
1077
1078 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1079 set_upstreams(transport, remote_refs, pretend);
1080
1081 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1082 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1083 struct ref *ref;
1084 for (ref = remote_refs; ref; ref = ref->next)
1085 transport_update_tracking_ref(transport->remote, ref, verbose);
1086 }
1087
1088 if (porcelain && !push_ret)
1089 puts("Done");
1090 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1091 fprintf(stderr, "Everything up-to-date\n");
1092
1093 return ret;
1094 }
1095 return 1;
1096 }
1097
1098 const struct ref *transport_get_remote_refs(struct transport *transport)
1099 {
1100 if (!transport->got_remote_refs) {
1101 transport->remote_refs = transport->get_refs_list(transport, 0);
1102 transport->got_remote_refs = 1;
1103 }
1104
1105 return transport->remote_refs;
1106 }
1107
1108 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1109 {
1110 int rc;
1111 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1112 struct ref **heads = NULL;
1113 struct ref *rm;
1114
1115 for (rm = refs; rm; rm = rm->next) {
1116 nr_refs++;
1117 if (rm->peer_ref &&
1118 !is_null_oid(&rm->old_oid) &&
1119 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1120 continue;
1121 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1122 heads[nr_heads++] = rm;
1123 }
1124
1125 if (!nr_heads) {
1126 /*
1127 * When deepening of a shallow repository is requested,
1128 * then local and remote refs are likely to still be equal.
1129 * Just feed them all to the fetch method in that case.
1130 * This condition shouldn't be met in a non-deepening fetch
1131 * (see builtin/fetch.c:quickfetch()).
1132 */
1133 ALLOC_ARRAY(heads, nr_refs);
1134 for (rm = refs; rm; rm = rm->next)
1135 heads[nr_heads++] = rm;
1136 }
1137
1138 rc = transport->fetch(transport, nr_heads, heads);
1139
1140 free(heads);
1141 return rc;
1142 }
1143
1144 void transport_unlock_pack(struct transport *transport)
1145 {
1146 if (transport->pack_lockfile) {
1147 unlink_or_warn(transport->pack_lockfile);
1148 FREE_AND_NULL(transport->pack_lockfile);
1149 }
1150 }
1151
1152 int transport_connect(struct transport *transport, const char *name,
1153 const char *exec, int fd[2])
1154 {
1155 if (transport->connect)
1156 return transport->connect(transport, name, exec, fd);
1157 else
1158 die("Operation not supported by protocol");
1159 }
1160
1161 int transport_disconnect(struct transport *transport)
1162 {
1163 int ret = 0;
1164 if (transport->disconnect)
1165 ret = transport->disconnect(transport);
1166 free(transport);
1167 return ret;
1168 }
1169
1170 /*
1171 * Strip username (and password) from a URL and return
1172 * it in a newly allocated string.
1173 */
1174 char *transport_anonymize_url(const char *url)
1175 {
1176 char *scheme_prefix, *anon_part;
1177 size_t anon_len, prefix_len = 0;
1178
1179 anon_part = strchr(url, '@');
1180 if (url_is_local_not_ssh(url) || !anon_part)
1181 goto literal_copy;
1182
1183 anon_len = strlen(++anon_part);
1184 scheme_prefix = strstr(url, "://");
1185 if (!scheme_prefix) {
1186 if (!strchr(anon_part, ':'))
1187 /* cannot be "me@there:/path/name" */
1188 goto literal_copy;
1189 } else {
1190 const char *cp;
1191 /* make sure scheme is reasonable */
1192 for (cp = url; cp < scheme_prefix; cp++) {
1193 switch (*cp) {
1194 /* RFC 1738 2.1 */
1195 case '+': case '.': case '-':
1196 break; /* ok */
1197 default:
1198 if (isalnum(*cp))
1199 break;
1200 /* it isn't */
1201 goto literal_copy;
1202 }
1203 }
1204 /* @ past the first slash does not count */
1205 cp = strchr(scheme_prefix + 3, '/');
1206 if (cp && cp < anon_part)
1207 goto literal_copy;
1208 prefix_len = scheme_prefix - url + 3;
1209 }
1210 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1211 (int)anon_len, anon_part);
1212 literal_copy:
1213 return xstrdup(url);
1214 }
1215
1216 static void read_alternate_refs(const char *path,
1217 alternate_ref_fn *cb,
1218 void *data)
1219 {
1220 struct child_process cmd = CHILD_PROCESS_INIT;
1221 struct strbuf line = STRBUF_INIT;
1222 FILE *fh;
1223
1224 cmd.git_cmd = 1;
1225 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1226 argv_array_push(&cmd.args, "for-each-ref");
1227 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1228 cmd.env = local_repo_env;
1229 cmd.out = -1;
1230
1231 if (start_command(&cmd))
1232 return;
1233
1234 fh = xfdopen(cmd.out, "r");
1235 while (strbuf_getline_lf(&line, fh) != EOF) {
1236 struct object_id oid;
1237
1238 if (get_oid_hex(line.buf, &oid) ||
1239 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1240 warning("invalid line while parsing alternate refs: %s",
1241 line.buf);
1242 break;
1243 }
1244
1245 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1246 }
1247
1248 fclose(fh);
1249 finish_command(&cmd);
1250 }
1251
1252 struct alternate_refs_data {
1253 alternate_ref_fn *fn;
1254 void *data;
1255 };
1256
1257 static int refs_from_alternate_cb(struct alternate_object_database *e,
1258 void *data)
1259 {
1260 struct strbuf path = STRBUF_INIT;
1261 size_t base_len;
1262 struct alternate_refs_data *cb = data;
1263
1264 if (!strbuf_realpath(&path, e->path, 0))
1265 goto out;
1266 if (!strbuf_strip_suffix(&path, "/objects"))
1267 goto out;
1268 base_len = path.len;
1269
1270 /* Is this a git repository with refs? */
1271 strbuf_addstr(&path, "/refs");
1272 if (!is_directory(path.buf))
1273 goto out;
1274 strbuf_setlen(&path, base_len);
1275
1276 read_alternate_refs(path.buf, cb->fn, cb->data);
1277
1278 out:
1279 strbuf_release(&path);
1280 return 0;
1281 }
1282
1283 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1284 {
1285 struct alternate_refs_data cb;
1286 cb.fn = fn;
1287 cb.data = data;
1288 foreach_alt_odb(refs_from_alternate_cb, &cb);
1289 }
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