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sha1_file: support lazily fetching missing objects
[git.git] / transport.c
blobf2fbc6f968c6ccca40204db951bcff358e6ef301
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 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
164 opts->from_promisor = !!value;
165 return 0;
166 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
167 opts->no_dependents = !!value;
168 return 0;
169 }
170 return 1;
171 }
172
173 static int connect_setup(struct transport *transport, int for_push)
174 {
175 struct git_transport_data *data = transport->data;
176 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
177
178 if (data->conn)
179 return 0;
180
181 switch (transport->family) {
182 case TRANSPORT_FAMILY_ALL: break;
183 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
184 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
185 }
186
187 data->conn = git_connect(data->fd, transport->url,
188 for_push ? data->options.receivepack :
189 data->options.uploadpack,
190 flags);
191
192 return 0;
193 }
194
195 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
196 {
197 struct git_transport_data *data = transport->data;
198 struct ref *refs;
199
200 connect_setup(transport, for_push);
201 get_remote_heads(data->fd[0], NULL, 0, &refs,
202 for_push ? REF_NORMAL : 0,
203 &data->extra_have,
204 &data->shallow);
205 data->got_remote_heads = 1;
206
207 return refs;
208 }
209
210 static int fetch_refs_via_pack(struct transport *transport,
211 int nr_heads, struct ref **to_fetch)
212 {
213 int ret = 0;
214 struct git_transport_data *data = transport->data;
215 struct ref *refs;
216 char *dest = xstrdup(transport->url);
217 struct fetch_pack_args args;
218 struct ref *refs_tmp = NULL;
219
220 memset(&args, 0, sizeof(args));
221 args.uploadpack = data->options.uploadpack;
222 args.keep_pack = data->options.keep;
223 args.lock_pack = 1;
224 args.use_thin_pack = data->options.thin;
225 args.include_tag = data->options.followtags;
226 args.verbose = (transport->verbose > 1);
227 args.quiet = (transport->verbose < 0);
228 args.no_progress = !transport->progress;
229 args.depth = data->options.depth;
230 args.deepen_since = data->options.deepen_since;
231 args.deepen_not = data->options.deepen_not;
232 args.deepen_relative = data->options.deepen_relative;
233 args.check_self_contained_and_connected =
234 data->options.check_self_contained_and_connected;
235 args.cloning = transport->cloning;
236 args.update_shallow = data->options.update_shallow;
237 args.from_promisor = data->options.from_promisor;
238 args.no_dependents = data->options.no_dependents;
239
240 if (!data->got_remote_heads) {
241 connect_setup(transport, 0);
242 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
243 NULL, &data->shallow);
244 data->got_remote_heads = 1;
245 }
246
247 refs = fetch_pack(&args, data->fd, data->conn,
248 refs_tmp ? refs_tmp : transport->remote_refs,
249 dest, to_fetch, nr_heads, &data->shallow,
250 &transport->pack_lockfile);
251 close(data->fd[0]);
252 close(data->fd[1]);
253 if (finish_connect(data->conn))
254 ret = -1;
255 data->conn = NULL;
256 data->got_remote_heads = 0;
257 data->options.self_contained_and_connected =
258 args.self_contained_and_connected;
259
260 if (refs == NULL)
261 ret = -1;
262 if (report_unmatched_refs(to_fetch, nr_heads))
263 ret = -1;
264
265 free_refs(refs_tmp);
266 free_refs(refs);
267 free(dest);
268 return ret;
269 }
270
271 static int push_had_errors(struct ref *ref)
272 {
273 for (; ref; ref = ref->next) {
274 switch (ref->status) {
275 case REF_STATUS_NONE:
276 case REF_STATUS_UPTODATE:
277 case REF_STATUS_OK:
278 break;
279 default:
280 return 1;
281 }
282 }
283 return 0;
284 }
285
286 int transport_refs_pushed(struct ref *ref)
287 {
288 for (; ref; ref = ref->next) {
289 switch(ref->status) {
290 case REF_STATUS_NONE:
291 case REF_STATUS_UPTODATE:
292 break;
293 default:
294 return 1;
295 }
296 }
297 return 0;
298 }
299
300 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
301 {
302 struct refspec rs;
303
304 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
305 return;
306
307 rs.src = ref->name;
308 rs.dst = NULL;
309
310 if (!remote_find_tracking(remote, &rs)) {
311 if (verbose)
312 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
313 if (ref->deletion) {
314 delete_ref(NULL, rs.dst, NULL, 0);
315 } else
316 update_ref("update by push", rs.dst,
317 ref->new_oid.hash, NULL, 0, 0);
318 free(rs.dst);
319 }
320 }
321
322 static void print_ref_status(char flag, const char *summary,
323 struct ref *to, struct ref *from, const char *msg,
324 int porcelain, int summary_width)
325 {
326 if (porcelain) {
327 if (from)
328 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
329 else
330 fprintf(stdout, "%c\t:%s\t", flag, to->name);
331 if (msg)
332 fprintf(stdout, "%s (%s)\n", summary, msg);
333 else
334 fprintf(stdout, "%s\n", summary);
335 } else {
336 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
337 if (from)
338 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
339 else
340 fputs(prettify_refname(to->name), stderr);
341 if (msg) {
342 fputs(" (", stderr);
343 fputs(msg, stderr);
344 fputc(')', stderr);
345 }
346 fputc('\n', stderr);
347 }
348 }
349
350 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
351 {
352 if (ref->deletion)
353 print_ref_status('-', "[deleted]", ref, NULL, NULL,
354 porcelain, summary_width);
355 else if (is_null_oid(&ref->old_oid))
356 print_ref_status('*',
357 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
358 "[new branch]"),
359 ref, ref->peer_ref, NULL, porcelain, summary_width);
360 else {
361 struct strbuf quickref = STRBUF_INIT;
362 char type;
363 const char *msg;
364
365 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
366 DEFAULT_ABBREV);
367 if (ref->forced_update) {
368 strbuf_addstr(&quickref, "...");
369 type = '+';
370 msg = "forced update";
371 } else {
372 strbuf_addstr(&quickref, "..");
373 type = ' ';
374 msg = NULL;
375 }
376 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
377 DEFAULT_ABBREV);
378
379 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
380 porcelain, summary_width);
381 strbuf_release(&quickref);
382 }
383 }
384
385 static int print_one_push_status(struct ref *ref, const char *dest, int count,
386 int porcelain, int summary_width)
387 {
388 if (!count) {
389 char *url = transport_anonymize_url(dest);
390 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
391 free(url);
392 }
393
394 switch(ref->status) {
395 case REF_STATUS_NONE:
396 print_ref_status('X', "[no match]", ref, NULL, NULL,
397 porcelain, summary_width);
398 break;
399 case REF_STATUS_REJECT_NODELETE:
400 print_ref_status('!', "[rejected]", ref, NULL,
401 "remote does not support deleting refs",
402 porcelain, summary_width);
403 break;
404 case REF_STATUS_UPTODATE:
405 print_ref_status('=', "[up to date]", ref,
406 ref->peer_ref, NULL, porcelain, summary_width);
407 break;
408 case REF_STATUS_REJECT_NONFASTFORWARD:
409 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
410 "non-fast-forward", porcelain, summary_width);
411 break;
412 case REF_STATUS_REJECT_ALREADY_EXISTS:
413 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
414 "already exists", porcelain, summary_width);
415 break;
416 case REF_STATUS_REJECT_FETCH_FIRST:
417 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
418 "fetch first", porcelain, summary_width);
419 break;
420 case REF_STATUS_REJECT_NEEDS_FORCE:
421 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
422 "needs force", porcelain, summary_width);
423 break;
424 case REF_STATUS_REJECT_STALE:
425 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
426 "stale info", porcelain, summary_width);
427 break;
428 case REF_STATUS_REJECT_SHALLOW:
429 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
430 "new shallow roots not allowed",
431 porcelain, summary_width);
432 break;
433 case REF_STATUS_REMOTE_REJECT:
434 print_ref_status('!', "[remote rejected]", ref,
435 ref->deletion ? NULL : ref->peer_ref,
436 ref->remote_status, porcelain, summary_width);
437 break;
438 case REF_STATUS_EXPECTING_REPORT:
439 print_ref_status('!', "[remote failure]", ref,
440 ref->deletion ? NULL : ref->peer_ref,
441 "remote failed to report status",
442 porcelain, summary_width);
443 break;
444 case REF_STATUS_ATOMIC_PUSH_FAILED:
445 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
446 "atomic push failed", porcelain, summary_width);
447 break;
448 case REF_STATUS_OK:
449 print_ok_ref_status(ref, porcelain, summary_width);
450 break;
451 }
452
453 return 1;
454 }
455
456 static int measure_abbrev(const struct object_id *oid, int sofar)
457 {
458 char hex[GIT_MAX_HEXSZ + 1];
459 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
460
461 return (w < sofar) ? sofar : w;
462 }
463
464 int transport_summary_width(const struct ref *refs)
465 {
466 int maxw = -1;
467
468 for (; refs; refs = refs->next) {
469 maxw = measure_abbrev(&refs->old_oid, maxw);
470 maxw = measure_abbrev(&refs->new_oid, maxw);
471 }
472 if (maxw < 0)
473 maxw = FALLBACK_DEFAULT_ABBREV;
474 return (2 * maxw + 3);
475 }
476
477 void transport_print_push_status(const char *dest, struct ref *refs,
478 int verbose, int porcelain, unsigned int *reject_reasons)
479 {
480 struct ref *ref;
481 int n = 0;
482 char *head;
483 int summary_width = transport_summary_width(refs);
484
485 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
486
487 if (verbose) {
488 for (ref = refs; ref; ref = ref->next)
489 if (ref->status == REF_STATUS_UPTODATE)
490 n += print_one_push_status(ref, dest, n,
491 porcelain, summary_width);
492 }
493
494 for (ref = refs; ref; ref = ref->next)
495 if (ref->status == REF_STATUS_OK)
496 n += print_one_push_status(ref, dest, n,
497 porcelain, summary_width);
498
499 *reject_reasons = 0;
500 for (ref = refs; ref; ref = ref->next) {
501 if (ref->status != REF_STATUS_NONE &&
502 ref->status != REF_STATUS_UPTODATE &&
503 ref->status != REF_STATUS_OK)
504 n += print_one_push_status(ref, dest, n,
505 porcelain, summary_width);
506 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
507 if (head != NULL && !strcmp(head, ref->name))
508 *reject_reasons |= REJECT_NON_FF_HEAD;
509 else
510 *reject_reasons |= REJECT_NON_FF_OTHER;
511 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
512 *reject_reasons |= REJECT_ALREADY_EXISTS;
513 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
514 *reject_reasons |= REJECT_FETCH_FIRST;
515 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
516 *reject_reasons |= REJECT_NEEDS_FORCE;
517 }
518 }
519 free(head);
520 }
521
522 void transport_verify_remote_names(int nr_heads, const char **heads)
523 {
524 int i;
525
526 for (i = 0; i < nr_heads; i++) {
527 const char *local = heads[i];
528 const char *remote = strrchr(heads[i], ':');
529
530 if (*local == '+')
531 local++;
532
533 /* A matching refspec is okay. */
534 if (remote == local && remote[1] == '\0')
535 continue;
536
537 remote = remote ? (remote + 1) : local;
538 if (check_refname_format(remote,
539 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
540 die("remote part of refspec is not a valid name in %s",
541 heads[i]);
542 }
543 }
544
545 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
546 {
547 struct git_transport_data *data = transport->data;
548 struct send_pack_args args;
549 int ret;
550
551 if (!data->got_remote_heads) {
552 struct ref *tmp_refs;
553 connect_setup(transport, 1);
554
555 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
556 NULL, &data->shallow);
557 data->got_remote_heads = 1;
558 }
559
560 memset(&args, 0, sizeof(args));
561 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
562 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
563 args.use_thin_pack = data->options.thin;
564 args.verbose = (transport->verbose > 0);
565 args.quiet = (transport->verbose < 0);
566 args.progress = transport->progress;
567 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
568 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
569 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
570 args.push_options = transport->push_options;
571 args.url = transport->url;
572
573 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
574 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
575 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
576 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
577 else
578 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
579
580 ret = send_pack(&args, data->fd, data->conn, remote_refs,
581 &data->extra_have);
582
583 close(data->fd[1]);
584 close(data->fd[0]);
585 ret |= finish_connect(data->conn);
586 data->conn = NULL;
587 data->got_remote_heads = 0;
588
589 return ret;
590 }
591
592 static int connect_git(struct transport *transport, const char *name,
593 const char *executable, int fd[2])
594 {
595 struct git_transport_data *data = transport->data;
596 data->conn = git_connect(data->fd, transport->url,
597 executable, 0);
598 fd[0] = data->fd[0];
599 fd[1] = data->fd[1];
600 return 0;
601 }
602
603 static int disconnect_git(struct transport *transport)
604 {
605 struct git_transport_data *data = transport->data;
606 if (data->conn) {
607 if (data->got_remote_heads)
608 packet_flush(data->fd[1]);
609 close(data->fd[0]);
610 close(data->fd[1]);
611 finish_connect(data->conn);
612 }
613
614 free(data);
615 return 0;
616 }
617
618 void transport_take_over(struct transport *transport,
619 struct child_process *child)
620 {
621 struct git_transport_data *data;
622
623 if (!transport->smart_options)
624 die("BUG: taking over transport requires non-NULL "
625 "smart_options field.");
626
627 data = xcalloc(1, sizeof(*data));
628 data->options = *transport->smart_options;
629 data->conn = child;
630 data->fd[0] = data->conn->out;
631 data->fd[1] = data->conn->in;
632 data->got_remote_heads = 0;
633 transport->data = data;
634
635 transport->set_option = NULL;
636 transport->get_refs_list = get_refs_via_connect;
637 transport->fetch = fetch_refs_via_pack;
638 transport->push = NULL;
639 transport->push_refs = git_transport_push;
640 transport->disconnect = disconnect_git;
641 transport->smart_options = &(data->options);
642
643 transport->cannot_reuse = 1;
644 }
645
646 static int is_file(const char *url)
647 {
648 struct stat buf;
649 if (stat(url, &buf))
650 return 0;
651 return S_ISREG(buf.st_mode);
652 }
653
654 static int external_specification_len(const char *url)
655 {
656 return strchr(url, ':') - url;
657 }
658
659 static const struct string_list *protocol_whitelist(void)
660 {
661 static int enabled = -1;
662 static struct string_list allowed = STRING_LIST_INIT_DUP;
663
664 if (enabled < 0) {
665 const char *v = getenv("GIT_ALLOW_PROTOCOL");
666 if (v) {
667 string_list_split(&allowed, v, ':', -1);
668 string_list_sort(&allowed);
669 enabled = 1;
670 } else {
671 enabled = 0;
672 }
673 }
674
675 return enabled ? &allowed : NULL;
676 }
677
678 enum protocol_allow_config {
679 PROTOCOL_ALLOW_NEVER = 0,
680 PROTOCOL_ALLOW_USER_ONLY,
681 PROTOCOL_ALLOW_ALWAYS
682 };
683
684 static enum protocol_allow_config parse_protocol_config(const char *key,
685 const char *value)
686 {
687 if (!strcasecmp(value, "always"))
688 return PROTOCOL_ALLOW_ALWAYS;
689 else if (!strcasecmp(value, "never"))
690 return PROTOCOL_ALLOW_NEVER;
691 else if (!strcasecmp(value, "user"))
692 return PROTOCOL_ALLOW_USER_ONLY;
693
694 die("unknown value for config '%s': %s", key, value);
695 }
696
697 static enum protocol_allow_config get_protocol_config(const char *type)
698 {
699 char *key = xstrfmt("protocol.%s.allow", type);
700 char *value;
701
702 /* first check the per-protocol config */
703 if (!git_config_get_string(key, &value)) {
704 enum protocol_allow_config ret =
705 parse_protocol_config(key, value);
706 free(key);
707 free(value);
708 return ret;
709 }
710 free(key);
711
712 /* if defined, fallback to user-defined default for unknown protocols */
713 if (!git_config_get_string("protocol.allow", &value)) {
714 enum protocol_allow_config ret =
715 parse_protocol_config("protocol.allow", value);
716 free(value);
717 return ret;
718 }
719
720 /* fallback to built-in defaults */
721 /* known safe */
722 if (!strcmp(type, "http") ||
723 !strcmp(type, "https") ||
724 !strcmp(type, "git") ||
725 !strcmp(type, "ssh") ||
726 !strcmp(type, "file"))
727 return PROTOCOL_ALLOW_ALWAYS;
728
729 /* known scary; err on the side of caution */
730 if (!strcmp(type, "ext"))
731 return PROTOCOL_ALLOW_NEVER;
732
733 /* unknown; by default let them be used only directly by the user */
734 return PROTOCOL_ALLOW_USER_ONLY;
735 }
736
737 int is_transport_allowed(const char *type, int from_user)
738 {
739 const struct string_list *whitelist = protocol_whitelist();
740 if (whitelist)
741 return string_list_has_string(whitelist, type);
742
743 switch (get_protocol_config(type)) {
744 case PROTOCOL_ALLOW_ALWAYS:
745 return 1;
746 case PROTOCOL_ALLOW_NEVER:
747 return 0;
748 case PROTOCOL_ALLOW_USER_ONLY:
749 if (from_user < 0)
750 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
751 return from_user;
752 }
753
754 die("BUG: invalid protocol_allow_config type");
755 }
756
757 void transport_check_allowed(const char *type)
758 {
759 if (!is_transport_allowed(type, -1))
760 die("transport '%s' not allowed", type);
761 }
762
763 struct transport *transport_get(struct remote *remote, const char *url)
764 {
765 const char *helper;
766 struct transport *ret = xcalloc(1, sizeof(*ret));
767
768 ret->progress = isatty(2);
769
770 if (!remote)
771 die("No remote provided to transport_get()");
772
773 ret->got_remote_refs = 0;
774 ret->remote = remote;
775 helper = remote->foreign_vcs;
776
777 if (!url && remote->url)
778 url = remote->url[0];
779 ret->url = url;
780
781 /* maybe it is a foreign URL? */
782 if (url) {
783 const char *p = url;
784
785 while (is_urlschemechar(p == url, *p))
786 p++;
787 if (starts_with(p, "::"))
788 helper = xstrndup(url, p - url);
789 }
790
791 if (helper) {
792 transport_helper_init(ret, helper);
793 } else if (starts_with(url, "rsync:")) {
794 die("git-over-rsync is no longer supported");
795 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
796 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
797 transport_check_allowed("file");
798 ret->data = data;
799 ret->get_refs_list = get_refs_from_bundle;
800 ret->fetch = fetch_refs_from_bundle;
801 ret->disconnect = close_bundle;
802 ret->smart_options = NULL;
803 } else if (!is_url(url)
804 || starts_with(url, "file://")
805 || starts_with(url, "git://")
806 || starts_with(url, "ssh://")
807 || starts_with(url, "git+ssh://") /* deprecated - do not use */
808 || starts_with(url, "ssh+git://") /* deprecated - do not use */
809 ) {
810 /*
811 * These are builtin smart transports; "allowed" transports
812 * will be checked individually in git_connect.
813 */
814 struct git_transport_data *data = xcalloc(1, sizeof(*data));
815 ret->data = data;
816 ret->set_option = NULL;
817 ret->get_refs_list = get_refs_via_connect;
818 ret->fetch = fetch_refs_via_pack;
819 ret->push_refs = git_transport_push;
820 ret->connect = connect_git;
821 ret->disconnect = disconnect_git;
822 ret->smart_options = &(data->options);
823
824 data->conn = NULL;
825 data->got_remote_heads = 0;
826 } else {
827 /* Unknown protocol in URL. Pass to external handler. */
828 int len = external_specification_len(url);
829 char *handler = xmemdupz(url, len);
830 transport_helper_init(ret, handler);
831 }
832
833 if (ret->smart_options) {
834 ret->smart_options->thin = 1;
835 ret->smart_options->uploadpack = "git-upload-pack";
836 if (remote->uploadpack)
837 ret->smart_options->uploadpack = remote->uploadpack;
838 ret->smart_options->receivepack = "git-receive-pack";
839 if (remote->receivepack)
840 ret->smart_options->receivepack = remote->receivepack;
841 }
842
843 return ret;
844 }
845
846 int transport_set_option(struct transport *transport,
847 const char *name, const char *value)
848 {
849 int git_reports = 1, protocol_reports = 1;
850
851 if (transport->smart_options)
852 git_reports = set_git_option(transport->smart_options,
853 name, value);
854
855 if (transport->set_option)
856 protocol_reports = transport->set_option(transport, name,
857 value);
858
859 /* If either report is 0, report 0 (success). */
860 if (!git_reports || !protocol_reports)
861 return 0;
862 /* If either reports -1 (invalid value), report -1. */
863 if ((git_reports == -1) || (protocol_reports == -1))
864 return -1;
865 /* Otherwise if both report unknown, report unknown. */
866 return 1;
867 }
868
869 void transport_set_verbosity(struct transport *transport, int verbosity,
870 int force_progress)
871 {
872 if (verbosity >= 1)
873 transport->verbose = verbosity <= 3 ? verbosity : 3;
874 if (verbosity < 0)
875 transport->verbose = -1;
876
877 /**
878 * Rules used to determine whether to report progress (processing aborts
879 * when a rule is satisfied):
880 *
881 * . Report progress, if force_progress is 1 (ie. --progress).
882 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
883 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
884 * . Report progress if isatty(2) is 1.
885 **/
886 if (force_progress >= 0)
887 transport->progress = !!force_progress;
888 else
889 transport->progress = verbosity >= 0 && isatty(2);
890 }
891
892 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
893 {
894 int i;
895
896 fprintf(stderr, _("The following submodule paths contain changes that can\n"
897 "not be found on any remote:\n"));
898 for (i = 0; i < needs_pushing->nr; i++)
899 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
900 fprintf(stderr, _("\nPlease try\n\n"
901 " git push --recurse-submodules=on-demand\n\n"
902 "or cd to the path and use\n\n"
903 " git push\n\n"
904 "to push them to a remote.\n\n"));
905
906 string_list_clear(needs_pushing, 0);
907
908 die(_("Aborting."));
909 }
910
911 static int run_pre_push_hook(struct transport *transport,
912 struct ref *remote_refs)
913 {
914 int ret = 0, x;
915 struct ref *r;
916 struct child_process proc = CHILD_PROCESS_INIT;
917 struct strbuf buf;
918 const char *argv[4];
919
920 if (!(argv[0] = find_hook("pre-push")))
921 return 0;
922
923 argv[1] = transport->remote->name;
924 argv[2] = transport->url;
925 argv[3] = NULL;
926
927 proc.argv = argv;
928 proc.in = -1;
929
930 if (start_command(&proc)) {
931 finish_command(&proc);
932 return -1;
933 }
934
935 sigchain_push(SIGPIPE, SIG_IGN);
936
937 strbuf_init(&buf, 256);
938
939 for (r = remote_refs; r; r = r->next) {
940 if (!r->peer_ref) continue;
941 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
942 if (r->status == REF_STATUS_REJECT_STALE) continue;
943 if (r->status == REF_STATUS_UPTODATE) continue;
944
945 strbuf_reset(&buf);
946 strbuf_addf( &buf, "%s %s %s %s\n",
947 r->peer_ref->name, oid_to_hex(&r->new_oid),
948 r->name, oid_to_hex(&r->old_oid));
949
950 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
951 /* We do not mind if a hook does not read all refs. */
952 if (errno != EPIPE)
953 ret = -1;
954 break;
955 }
956 }
957
958 strbuf_release(&buf);
959
960 x = close(proc.in);
961 if (!ret)
962 ret = x;
963
964 sigchain_pop(SIGPIPE);
965
966 x = finish_command(&proc);
967 if (!ret)
968 ret = x;
969
970 return ret;
971 }
972
973 int transport_push(struct transport *transport,
974 int refspec_nr, const char **refspec, int flags,
975 unsigned int *reject_reasons)
976 {
977 *reject_reasons = 0;
978 transport_verify_remote_names(refspec_nr, refspec);
979
980 if (transport->push) {
981 /* Maybe FIXME. But no important transport uses this case. */
982 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
983 die("This transport does not support using --set-upstream");
984
985 return transport->push(transport, refspec_nr, refspec, flags);
986 } else if (transport->push_refs) {
987 struct ref *remote_refs;
988 struct ref *local_refs = get_local_heads();
989 int match_flags = MATCH_REFS_NONE;
990 int verbose = (transport->verbose > 0);
991 int quiet = (transport->verbose < 0);
992 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
993 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
994 int push_ret, ret, err;
995
996 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
997 return -1;
998
999 remote_refs = transport->get_refs_list(transport, 1);
1000
1001 if (flags & TRANSPORT_PUSH_ALL)
1002 match_flags |= MATCH_REFS_ALL;
1003 if (flags & TRANSPORT_PUSH_MIRROR)
1004 match_flags |= MATCH_REFS_MIRROR;
1005 if (flags & TRANSPORT_PUSH_PRUNE)
1006 match_flags |= MATCH_REFS_PRUNE;
1007 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1008 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1009
1010 if (match_push_refs(local_refs, &remote_refs,
1011 refspec_nr, refspec, match_flags)) {
1012 return -1;
1013 }
1014
1015 if (transport->smart_options &&
1016 transport->smart_options->cas &&
1017 !is_empty_cas(transport->smart_options->cas))
1018 apply_push_cas(transport->smart_options->cas,
1019 transport->remote, remote_refs);
1020
1021 set_ref_status_for_push(remote_refs,
1022 flags & TRANSPORT_PUSH_MIRROR,
1023 flags & TRANSPORT_PUSH_FORCE);
1024
1025 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1026 if (run_pre_push_hook(transport, remote_refs))
1027 return -1;
1028
1029 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1030 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1031 !is_bare_repository()) {
1032 struct ref *ref = remote_refs;
1033 struct oid_array commits = OID_ARRAY_INIT;
1034
1035 for (; ref; ref = ref->next)
1036 if (!is_null_oid(&ref->new_oid))
1037 oid_array_append(&commits,
1038 &ref->new_oid);
1039
1040 if (!push_unpushed_submodules(&commits,
1041 transport->remote,
1042 refspec, refspec_nr,
1043 transport->push_options,
1044 pretend)) {
1045 oid_array_clear(&commits);
1046 die("Failed to push all needed submodules!");
1047 }
1048 oid_array_clear(&commits);
1049 }
1050
1051 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1052 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1053 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1054 !pretend)) && !is_bare_repository()) {
1055 struct ref *ref = remote_refs;
1056 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1057 struct oid_array commits = OID_ARRAY_INIT;
1058
1059 for (; ref; ref = ref->next)
1060 if (!is_null_oid(&ref->new_oid))
1061 oid_array_append(&commits,
1062 &ref->new_oid);
1063
1064 if (find_unpushed_submodules(&commits, transport->remote->name,
1065 &needs_pushing)) {
1066 oid_array_clear(&commits);
1067 die_with_unpushed_submodules(&needs_pushing);
1068 }
1069 string_list_clear(&needs_pushing, 0);
1070 oid_array_clear(&commits);
1071 }
1072
1073 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1074 push_ret = transport->push_refs(transport, remote_refs, flags);
1075 else
1076 push_ret = 0;
1077 err = push_had_errors(remote_refs);
1078 ret = push_ret | err;
1079
1080 if (!quiet || err)
1081 transport_print_push_status(transport->url, remote_refs,
1082 verbose | porcelain, porcelain,
1083 reject_reasons);
1084
1085 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1086 set_upstreams(transport, remote_refs, pretend);
1087
1088 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1089 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1090 struct ref *ref;
1091 for (ref = remote_refs; ref; ref = ref->next)
1092 transport_update_tracking_ref(transport->remote, ref, verbose);
1093 }
1094
1095 if (porcelain && !push_ret)
1096 puts("Done");
1097 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1098 fprintf(stderr, "Everything up-to-date\n");
1099
1100 return ret;
1101 }
1102 return 1;
1103 }
1104
1105 const struct ref *transport_get_remote_refs(struct transport *transport)
1106 {
1107 if (!transport->got_remote_refs) {
1108 transport->remote_refs = transport->get_refs_list(transport, 0);
1109 transport->got_remote_refs = 1;
1110 }
1111
1112 return transport->remote_refs;
1113 }
1114
1115 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1116 {
1117 int rc;
1118 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1119 struct ref **heads = NULL;
1120 struct ref *rm;
1121
1122 for (rm = refs; rm; rm = rm->next) {
1123 nr_refs++;
1124 if (rm->peer_ref &&
1125 !is_null_oid(&rm->old_oid) &&
1126 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1127 continue;
1128 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1129 heads[nr_heads++] = rm;
1130 }
1131
1132 if (!nr_heads) {
1133 /*
1134 * When deepening of a shallow repository is requested,
1135 * then local and remote refs are likely to still be equal.
1136 * Just feed them all to the fetch method in that case.
1137 * This condition shouldn't be met in a non-deepening fetch
1138 * (see builtin/fetch.c:quickfetch()).
1139 */
1140 ALLOC_ARRAY(heads, nr_refs);
1141 for (rm = refs; rm; rm = rm->next)
1142 heads[nr_heads++] = rm;
1143 }
1144
1145 rc = transport->fetch(transport, nr_heads, heads);
1146
1147 free(heads);
1148 return rc;
1149 }
1150
1151 void transport_unlock_pack(struct transport *transport)
1152 {
1153 if (transport->pack_lockfile) {
1154 unlink_or_warn(transport->pack_lockfile);
1155 FREE_AND_NULL(transport->pack_lockfile);
1156 }
1157 }
1158
1159 int transport_connect(struct transport *transport, const char *name,
1160 const char *exec, int fd[2])
1161 {
1162 if (transport->connect)
1163 return transport->connect(transport, name, exec, fd);
1164 else
1165 die("Operation not supported by protocol");
1166 }
1167
1168 int transport_disconnect(struct transport *transport)
1169 {
1170 int ret = 0;
1171 if (transport->disconnect)
1172 ret = transport->disconnect(transport);
1173 free(transport);
1174 return ret;
1175 }
1176
1177 /*
1178 * Strip username (and password) from a URL and return
1179 * it in a newly allocated string.
1180 */
1181 char *transport_anonymize_url(const char *url)
1182 {
1183 char *scheme_prefix, *anon_part;
1184 size_t anon_len, prefix_len = 0;
1185
1186 anon_part = strchr(url, '@');
1187 if (url_is_local_not_ssh(url) || !anon_part)
1188 goto literal_copy;
1189
1190 anon_len = strlen(++anon_part);
1191 scheme_prefix = strstr(url, "://");
1192 if (!scheme_prefix) {
1193 if (!strchr(anon_part, ':'))
1194 /* cannot be "me@there:/path/name" */
1195 goto literal_copy;
1196 } else {
1197 const char *cp;
1198 /* make sure scheme is reasonable */
1199 for (cp = url; cp < scheme_prefix; cp++) {
1200 switch (*cp) {
1201 /* RFC 1738 2.1 */
1202 case '+': case '.': case '-':
1203 break; /* ok */
1204 default:
1205 if (isalnum(*cp))
1206 break;
1207 /* it isn't */
1208 goto literal_copy;
1209 }
1210 }
1211 /* @ past the first slash does not count */
1212 cp = strchr(scheme_prefix + 3, '/');
1213 if (cp && cp < anon_part)
1214 goto literal_copy;
1215 prefix_len = scheme_prefix - url + 3;
1216 }
1217 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1218 (int)anon_len, anon_part);
1219 literal_copy:
1220 return xstrdup(url);
1221 }
1222
1223 static void read_alternate_refs(const char *path,
1224 alternate_ref_fn *cb,
1225 void *data)
1226 {
1227 struct child_process cmd = CHILD_PROCESS_INIT;
1228 struct strbuf line = STRBUF_INIT;
1229 FILE *fh;
1230
1231 cmd.git_cmd = 1;
1232 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1233 argv_array_push(&cmd.args, "for-each-ref");
1234 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1235 cmd.env = local_repo_env;
1236 cmd.out = -1;
1237
1238 if (start_command(&cmd))
1239 return;
1240
1241 fh = xfdopen(cmd.out, "r");
1242 while (strbuf_getline_lf(&line, fh) != EOF) {
1243 struct object_id oid;
1244
1245 if (get_oid_hex(line.buf, &oid) ||
1246 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1247 warning("invalid line while parsing alternate refs: %s",
1248 line.buf);
1249 break;
1250 }
1251
1252 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1253 }
1254
1255 fclose(fh);
1256 finish_command(&cmd);
1257 }
1258
1259 struct alternate_refs_data {
1260 alternate_ref_fn *fn;
1261 void *data;
1262 };
1263
1264 static int refs_from_alternate_cb(struct alternate_object_database *e,
1265 void *data)
1266 {
1267 struct strbuf path = STRBUF_INIT;
1268 size_t base_len;
1269 struct alternate_refs_data *cb = data;
1270
1271 if (!strbuf_realpath(&path, e->path, 0))
1272 goto out;
1273 if (!strbuf_strip_suffix(&path, "/objects"))
1274 goto out;
1275 base_len = path.len;
1276
1277 /* Is this a git repository with refs? */
1278 strbuf_addstr(&path, "/refs");
1279 if (!is_directory(path.buf))
1280 goto out;
1281 strbuf_setlen(&path, base_len);
1282
1283 read_alternate_refs(path.buf, cb->fn, cb->data);
1284
1285 out:
1286 strbuf_release(&path);
1287 return 0;
1288 }
1289
1290 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1291 {
1292 struct alternate_refs_data cb;
1293 cb.fn = fn;
1294 cb.data = data;
1295 foreach_alt_odb(refs_from_alternate_cb, &cb);
1296 }
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