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Revert "gpg-interface: prefer check_signature() for GPG verification"
[git.git] / transport.c
blob453de8f7041b966a9bd0eaee20ef8f5758cec2f1
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 {
156 struct bundle_transport_data *data = transport->data;
157 return unbundle(the_repository, &data->header, data->fd,
158 transport->progress ? BUNDLE_VERBOSE : 0);
159 }
160
161 static int close_bundle(struct transport *transport)
162 {
163 struct bundle_transport_data *data = transport->data;
164 if (data->fd > 0)
165 close(data->fd);
166 free(data);
167 return 0;
168 }
169
170 struct git_transport_data {
171 struct git_transport_options options;
172 struct child_process *conn;
173 int fd[2];
174 unsigned got_remote_heads : 1;
175 enum protocol_version version;
176 struct oid_array extra_have;
177 struct oid_array shallow;
178 };
179
180 static int set_git_option(struct git_transport_options *opts,
181 const char *name, const char *value)
182 {
183 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
184 opts->uploadpack = value;
185 return 0;
186 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
187 opts->receivepack = value;
188 return 0;
189 } else if (!strcmp(name, TRANS_OPT_THIN)) {
190 opts->thin = !!value;
191 return 0;
192 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
193 opts->followtags = !!value;
194 return 0;
195 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
196 opts->keep = !!value;
197 return 0;
198 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
199 opts->update_shallow = !!value;
200 return 0;
201 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
202 if (!value)
203 opts->depth = 0;
204 else {
205 char *end;
206 opts->depth = strtol(value, &end, 0);
207 if (*end)
208 die(_("transport: invalid depth option '%s'"), value);
209 }
210 return 0;
211 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
212 opts->deepen_since = value;
213 return 0;
214 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
215 opts->deepen_not = (const struct string_list *)value;
216 return 0;
217 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
218 opts->deepen_relative = !!value;
219 return 0;
220 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
221 opts->from_promisor = !!value;
222 return 0;
223 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
224 opts->no_dependents = !!value;
225 return 0;
226 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
227 parse_list_objects_filter(&opts->filter_options, value);
228 return 0;
229 }
230 return 1;
231 }
232
233 static int connect_setup(struct transport *transport, int for_push)
234 {
235 struct git_transport_data *data = transport->data;
236 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
237
238 if (data->conn)
239 return 0;
240
241 switch (transport->family) {
242 case TRANSPORT_FAMILY_ALL: break;
243 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
244 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
245 }
246
247 data->conn = git_connect(data->fd, transport->url,
248 for_push ? data->options.receivepack :
249 data->options.uploadpack,
250 flags);
251
252 return 0;
253 }
254
255 static void die_if_server_options(struct transport *transport)
256 {
257 if (!transport->server_options || !transport->server_options->nr)
258 return;
259 advise(_("see protocol.version in 'git help config' for more details"));
260 die(_("server options require protocol version 2 or later"));
261 }
262
263 /*
264 * Obtains the protocol version from the transport and writes it to
265 * transport->data->version, first connecting if not already connected.
266 *
267 * If the protocol version is one that allows skipping the listing of remote
268 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
269 * this function returns NULL. Otherwise, this function returns the list of
270 * remote refs.
271 */
272 static struct ref *handshake(struct transport *transport, int for_push,
273 const struct argv_array *ref_prefixes,
274 int must_list_refs)
275 {
276 struct git_transport_data *data = transport->data;
277 struct ref *refs = NULL;
278 struct packet_reader reader;
279
280 connect_setup(transport, for_push);
281
282 packet_reader_init(&reader, data->fd[0], NULL, 0,
283 PACKET_READ_CHOMP_NEWLINE |
284 PACKET_READ_GENTLE_ON_EOF |
285 PACKET_READ_DIE_ON_ERR_PACKET);
286
287 data->version = discover_version(&reader);
288 switch (data->version) {
289 case protocol_v2:
290 if (must_list_refs)
291 get_remote_refs(data->fd[1], &reader, &refs, for_push,
292 ref_prefixes,
293 transport->server_options);
294 break;
295 case protocol_v1:
296 case protocol_v0:
297 die_if_server_options(transport);
298 get_remote_heads(&reader, &refs,
299 for_push ? REF_NORMAL : 0,
300 &data->extra_have,
301 &data->shallow);
302 break;
303 case protocol_unknown_version:
304 BUG("unknown protocol version");
305 }
306 data->got_remote_heads = 1;
307
308 if (reader.line_peeked)
309 BUG("buffer must be empty at the end of handshake()");
310
311 return refs;
312 }
313
314 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
315 const struct argv_array *ref_prefixes)
316 {
317 return handshake(transport, for_push, ref_prefixes, 1);
318 }
319
320 static int fetch_refs_via_pack(struct transport *transport,
321 int nr_heads, struct ref **to_fetch)
322 {
323 int ret = 0;
324 struct git_transport_data *data = transport->data;
325 struct ref *refs = NULL;
326 struct fetch_pack_args args;
327 struct ref *refs_tmp = NULL;
328
329 memset(&args, 0, sizeof(args));
330 args.uploadpack = data->options.uploadpack;
331 args.keep_pack = data->options.keep;
332 args.lock_pack = 1;
333 args.use_thin_pack = data->options.thin;
334 args.include_tag = data->options.followtags;
335 args.verbose = (transport->verbose > 1);
336 args.quiet = (transport->verbose < 0);
337 args.no_progress = !transport->progress;
338 args.depth = data->options.depth;
339 args.deepen_since = data->options.deepen_since;
340 args.deepen_not = data->options.deepen_not;
341 args.deepen_relative = data->options.deepen_relative;
342 args.check_self_contained_and_connected =
343 data->options.check_self_contained_and_connected;
344 args.cloning = transport->cloning;
345 args.update_shallow = data->options.update_shallow;
346 args.from_promisor = data->options.from_promisor;
347 args.no_dependents = data->options.no_dependents;
348 args.filter_options = data->options.filter_options;
349 args.stateless_rpc = transport->stateless_rpc;
350 args.server_options = transport->server_options;
351 args.negotiation_tips = data->options.negotiation_tips;
352
353 if (!data->got_remote_heads) {
354 int i;
355 int must_list_refs = 0;
356 for (i = 0; i < nr_heads; i++) {
357 if (!to_fetch[i]->exact_oid) {
358 must_list_refs = 1;
359 break;
360 }
361 }
362 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
363 }
364
365 switch (data->version) {
366 case protocol_v2:
367 refs = fetch_pack(&args, data->fd,
368 refs_tmp ? refs_tmp : transport->remote_refs,
369 to_fetch, nr_heads, &data->shallow,
370 &transport->pack_lockfile, data->version);
371 break;
372 case protocol_v1:
373 case protocol_v0:
374 die_if_server_options(transport);
375 refs = fetch_pack(&args, data->fd,
376 refs_tmp ? refs_tmp : transport->remote_refs,
377 to_fetch, nr_heads, &data->shallow,
378 &transport->pack_lockfile, data->version);
379 break;
380 case protocol_unknown_version:
381 BUG("unknown protocol version");
382 }
383
384 close(data->fd[0]);
385 close(data->fd[1]);
386 if (finish_connect(data->conn))
387 ret = -1;
388 data->conn = NULL;
389 data->got_remote_heads = 0;
390 data->options.self_contained_and_connected =
391 args.self_contained_and_connected;
392 data->options.connectivity_checked = args.connectivity_checked;
393
394 if (refs == NULL)
395 ret = -1;
396 if (report_unmatched_refs(to_fetch, nr_heads))
397 ret = -1;
398
399 free_refs(refs_tmp);
400 free_refs(refs);
401 return ret;
402 }
403
404 static int push_had_errors(struct ref *ref)
405 {
406 for (; ref; ref = ref->next) {
407 switch (ref->status) {
408 case REF_STATUS_NONE:
409 case REF_STATUS_UPTODATE:
410 case REF_STATUS_OK:
411 break;
412 default:
413 return 1;
414 }
415 }
416 return 0;
417 }
418
419 int transport_refs_pushed(struct ref *ref)
420 {
421 for (; ref; ref = ref->next) {
422 switch(ref->status) {
423 case REF_STATUS_NONE:
424 case REF_STATUS_UPTODATE:
425 break;
426 default:
427 return 1;
428 }
429 }
430 return 0;
431 }
432
433 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
434 {
435 struct refspec_item rs;
436
437 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
438 return;
439
440 rs.src = ref->name;
441 rs.dst = NULL;
442
443 if (!remote_find_tracking(remote, &rs)) {
444 if (verbose)
445 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
446 if (ref->deletion) {
447 delete_ref(NULL, rs.dst, NULL, 0);
448 } else
449 update_ref("update by push", rs.dst, &ref->new_oid,
450 NULL, 0, 0);
451 free(rs.dst);
452 }
453 }
454
455 static void print_ref_status(char flag, const char *summary,
456 struct ref *to, struct ref *from, const char *msg,
457 int porcelain, int summary_width)
458 {
459 if (porcelain) {
460 if (from)
461 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
462 else
463 fprintf(stdout, "%c\t:%s\t", flag, to->name);
464 if (msg)
465 fprintf(stdout, "%s (%s)\n", summary, msg);
466 else
467 fprintf(stdout, "%s\n", summary);
468 } else {
469 const char *red = "", *reset = "";
470 if (push_had_errors(to)) {
471 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
472 reset = transport_get_color(TRANSPORT_COLOR_RESET);
473 }
474 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
475 summary, reset);
476 if (from)
477 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
478 else
479 fputs(prettify_refname(to->name), stderr);
480 if (msg) {
481 fputs(" (", stderr);
482 fputs(msg, stderr);
483 fputc(')', stderr);
484 }
485 fputc('\n', stderr);
486 }
487 }
488
489 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
490 {
491 if (ref->deletion)
492 print_ref_status('-', "[deleted]", ref, NULL, NULL,
493 porcelain, summary_width);
494 else if (is_null_oid(&ref->old_oid))
495 print_ref_status('*',
496 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
497 "[new branch]"),
498 ref, ref->peer_ref, NULL, porcelain, summary_width);
499 else {
500 struct strbuf quickref = STRBUF_INIT;
501 char type;
502 const char *msg;
503
504 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
505 DEFAULT_ABBREV);
506 if (ref->forced_update) {
507 strbuf_addstr(&quickref, "...");
508 type = '+';
509 msg = "forced update";
510 } else {
511 strbuf_addstr(&quickref, "..");
512 type = ' ';
513 msg = NULL;
514 }
515 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
516 DEFAULT_ABBREV);
517
518 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
519 porcelain, summary_width);
520 strbuf_release(&quickref);
521 }
522 }
523
524 static int print_one_push_status(struct ref *ref, const char *dest, int count,
525 int porcelain, int summary_width)
526 {
527 if (!count) {
528 char *url = transport_anonymize_url(dest);
529 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
530 free(url);
531 }
532
533 switch(ref->status) {
534 case REF_STATUS_NONE:
535 print_ref_status('X', "[no match]", ref, NULL, NULL,
536 porcelain, summary_width);
537 break;
538 case REF_STATUS_REJECT_NODELETE:
539 print_ref_status('!', "[rejected]", ref, NULL,
540 "remote does not support deleting refs",
541 porcelain, summary_width);
542 break;
543 case REF_STATUS_UPTODATE:
544 print_ref_status('=', "[up to date]", ref,
545 ref->peer_ref, NULL, porcelain, summary_width);
546 break;
547 case REF_STATUS_REJECT_NONFASTFORWARD:
548 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
549 "non-fast-forward", porcelain, summary_width);
550 break;
551 case REF_STATUS_REJECT_ALREADY_EXISTS:
552 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
553 "already exists", porcelain, summary_width);
554 break;
555 case REF_STATUS_REJECT_FETCH_FIRST:
556 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
557 "fetch first", porcelain, summary_width);
558 break;
559 case REF_STATUS_REJECT_NEEDS_FORCE:
560 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
561 "needs force", porcelain, summary_width);
562 break;
563 case REF_STATUS_REJECT_STALE:
564 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
565 "stale info", porcelain, summary_width);
566 break;
567 case REF_STATUS_REJECT_SHALLOW:
568 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
569 "new shallow roots not allowed",
570 porcelain, summary_width);
571 break;
572 case REF_STATUS_REMOTE_REJECT:
573 print_ref_status('!', "[remote rejected]", ref,
574 ref->deletion ? NULL : ref->peer_ref,
575 ref->remote_status, porcelain, summary_width);
576 break;
577 case REF_STATUS_EXPECTING_REPORT:
578 print_ref_status('!', "[remote failure]", ref,
579 ref->deletion ? NULL : ref->peer_ref,
580 "remote failed to report status",
581 porcelain, summary_width);
582 break;
583 case REF_STATUS_ATOMIC_PUSH_FAILED:
584 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
585 "atomic push failed", porcelain, summary_width);
586 break;
587 case REF_STATUS_OK:
588 print_ok_ref_status(ref, porcelain, summary_width);
589 break;
590 }
591
592 return 1;
593 }
594
595 static int measure_abbrev(const struct object_id *oid, int sofar)
596 {
597 char hex[GIT_MAX_HEXSZ + 1];
598 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
599
600 return (w < sofar) ? sofar : w;
601 }
602
603 int transport_summary_width(const struct ref *refs)
604 {
605 int maxw = -1;
606
607 for (; refs; refs = refs->next) {
608 maxw = measure_abbrev(&refs->old_oid, maxw);
609 maxw = measure_abbrev(&refs->new_oid, maxw);
610 }
611 if (maxw < 0)
612 maxw = FALLBACK_DEFAULT_ABBREV;
613 return (2 * maxw + 3);
614 }
615
616 void transport_print_push_status(const char *dest, struct ref *refs,
617 int verbose, int porcelain, unsigned int *reject_reasons)
618 {
619 struct ref *ref;
620 int n = 0;
621 char *head;
622 int summary_width = transport_summary_width(refs);
623
624 if (transport_color_config() < 0)
625 warning(_("could not parse transport.color.* config"));
626
627 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
628
629 if (verbose) {
630 for (ref = refs; ref; ref = ref->next)
631 if (ref->status == REF_STATUS_UPTODATE)
632 n += print_one_push_status(ref, dest, n,
633 porcelain, summary_width);
634 }
635
636 for (ref = refs; ref; ref = ref->next)
637 if (ref->status == REF_STATUS_OK)
638 n += print_one_push_status(ref, dest, n,
639 porcelain, summary_width);
640
641 *reject_reasons = 0;
642 for (ref = refs; ref; ref = ref->next) {
643 if (ref->status != REF_STATUS_NONE &&
644 ref->status != REF_STATUS_UPTODATE &&
645 ref->status != REF_STATUS_OK)
646 n += print_one_push_status(ref, dest, n,
647 porcelain, summary_width);
648 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
649 if (head != NULL && !strcmp(head, ref->name))
650 *reject_reasons |= REJECT_NON_FF_HEAD;
651 else
652 *reject_reasons |= REJECT_NON_FF_OTHER;
653 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
654 *reject_reasons |= REJECT_ALREADY_EXISTS;
655 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
656 *reject_reasons |= REJECT_FETCH_FIRST;
657 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
658 *reject_reasons |= REJECT_NEEDS_FORCE;
659 }
660 }
661 free(head);
662 }
663
664 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
665 {
666 struct git_transport_data *data = transport->data;
667 struct send_pack_args args;
668 int ret = 0;
669
670 if (transport_color_config() < 0)
671 return -1;
672
673 if (!data->got_remote_heads)
674 get_refs_via_connect(transport, 1, NULL);
675
676 memset(&args, 0, sizeof(args));
677 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
678 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
679 args.use_thin_pack = data->options.thin;
680 args.verbose = (transport->verbose > 0);
681 args.quiet = (transport->verbose < 0);
682 args.progress = transport->progress;
683 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
684 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
685 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
686 args.push_options = transport->push_options;
687 args.url = transport->url;
688
689 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
690 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
691 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
692 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
693 else
694 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
695
696 switch (data->version) {
697 case protocol_v2:
698 die(_("support for protocol v2 not implemented yet"));
699 break;
700 case protocol_v1:
701 case protocol_v0:
702 ret = send_pack(&args, data->fd, data->conn, remote_refs,
703 &data->extra_have);
704 break;
705 case protocol_unknown_version:
706 BUG("unknown protocol version");
707 }
708
709 close(data->fd[1]);
710 close(data->fd[0]);
711 ret |= finish_connect(data->conn);
712 data->conn = NULL;
713 data->got_remote_heads = 0;
714
715 return ret;
716 }
717
718 static int connect_git(struct transport *transport, const char *name,
719 const char *executable, int fd[2])
720 {
721 struct git_transport_data *data = transport->data;
722 data->conn = git_connect(data->fd, transport->url,
723 executable, 0);
724 fd[0] = data->fd[0];
725 fd[1] = data->fd[1];
726 return 0;
727 }
728
729 static int disconnect_git(struct transport *transport)
730 {
731 struct git_transport_data *data = transport->data;
732 if (data->conn) {
733 if (data->got_remote_heads)
734 packet_flush(data->fd[1]);
735 close(data->fd[0]);
736 close(data->fd[1]);
737 finish_connect(data->conn);
738 }
739
740 free(data);
741 return 0;
742 }
743
744 static struct transport_vtable taken_over_vtable = {
745 1,
746 NULL,
747 get_refs_via_connect,
748 fetch_refs_via_pack,
749 git_transport_push,
750 NULL,
751 disconnect_git
752 };
753
754 void transport_take_over(struct transport *transport,
755 struct child_process *child)
756 {
757 struct git_transport_data *data;
758
759 if (!transport->smart_options)
760 BUG("taking over transport requires non-NULL "
761 "smart_options field.");
762
763 data = xcalloc(1, sizeof(*data));
764 data->options = *transport->smart_options;
765 data->conn = child;
766 data->fd[0] = data->conn->out;
767 data->fd[1] = data->conn->in;
768 data->got_remote_heads = 0;
769 transport->data = data;
770
771 transport->vtable = &taken_over_vtable;
772 transport->smart_options = &(data->options);
773
774 transport->cannot_reuse = 1;
775 }
776
777 static int is_file(const char *url)
778 {
779 struct stat buf;
780 if (stat(url, &buf))
781 return 0;
782 return S_ISREG(buf.st_mode);
783 }
784
785 static int external_specification_len(const char *url)
786 {
787 return strchr(url, ':') - url;
788 }
789
790 static const struct string_list *protocol_whitelist(void)
791 {
792 static int enabled = -1;
793 static struct string_list allowed = STRING_LIST_INIT_DUP;
794
795 if (enabled < 0) {
796 const char *v = getenv("GIT_ALLOW_PROTOCOL");
797 if (v) {
798 string_list_split(&allowed, v, ':', -1);
799 string_list_sort(&allowed);
800 enabled = 1;
801 } else {
802 enabled = 0;
803 }
804 }
805
806 return enabled ? &allowed : NULL;
807 }
808
809 enum protocol_allow_config {
810 PROTOCOL_ALLOW_NEVER = 0,
811 PROTOCOL_ALLOW_USER_ONLY,
812 PROTOCOL_ALLOW_ALWAYS
813 };
814
815 static enum protocol_allow_config parse_protocol_config(const char *key,
816 const char *value)
817 {
818 if (!strcasecmp(value, "always"))
819 return PROTOCOL_ALLOW_ALWAYS;
820 else if (!strcasecmp(value, "never"))
821 return PROTOCOL_ALLOW_NEVER;
822 else if (!strcasecmp(value, "user"))
823 return PROTOCOL_ALLOW_USER_ONLY;
824
825 die(_("unknown value for config '%s': %s"), key, value);
826 }
827
828 static enum protocol_allow_config get_protocol_config(const char *type)
829 {
830 char *key = xstrfmt("protocol.%s.allow", type);
831 char *value;
832
833 /* first check the per-protocol config */
834 if (!git_config_get_string(key, &value)) {
835 enum protocol_allow_config ret =
836 parse_protocol_config(key, value);
837 free(key);
838 free(value);
839 return ret;
840 }
841 free(key);
842
843 /* if defined, fallback to user-defined default for unknown protocols */
844 if (!git_config_get_string("protocol.allow", &value)) {
845 enum protocol_allow_config ret =
846 parse_protocol_config("protocol.allow", value);
847 free(value);
848 return ret;
849 }
850
851 /* fallback to built-in defaults */
852 /* known safe */
853 if (!strcmp(type, "http") ||
854 !strcmp(type, "https") ||
855 !strcmp(type, "git") ||
856 !strcmp(type, "ssh") ||
857 !strcmp(type, "file"))
858 return PROTOCOL_ALLOW_ALWAYS;
859
860 /* known scary; err on the side of caution */
861 if (!strcmp(type, "ext"))
862 return PROTOCOL_ALLOW_NEVER;
863
864 /* unknown; by default let them be used only directly by the user */
865 return PROTOCOL_ALLOW_USER_ONLY;
866 }
867
868 int is_transport_allowed(const char *type, int from_user)
869 {
870 const struct string_list *whitelist = protocol_whitelist();
871 if (whitelist)
872 return string_list_has_string(whitelist, type);
873
874 switch (get_protocol_config(type)) {
875 case PROTOCOL_ALLOW_ALWAYS:
876 return 1;
877 case PROTOCOL_ALLOW_NEVER:
878 return 0;
879 case PROTOCOL_ALLOW_USER_ONLY:
880 if (from_user < 0)
881 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
882 return from_user;
883 }
884
885 BUG("invalid protocol_allow_config type");
886 }
887
888 void transport_check_allowed(const char *type)
889 {
890 if (!is_transport_allowed(type, -1))
891 die(_("transport '%s' not allowed"), type);
892 }
893
894 static struct transport_vtable bundle_vtable = {
895 0,
896 NULL,
897 get_refs_from_bundle,
898 fetch_refs_from_bundle,
899 NULL,
900 NULL,
901 close_bundle
902 };
903
904 static struct transport_vtable builtin_smart_vtable = {
905 1,
906 NULL,
907 get_refs_via_connect,
908 fetch_refs_via_pack,
909 git_transport_push,
910 connect_git,
911 disconnect_git
912 };
913
914 struct transport *transport_get(struct remote *remote, const char *url)
915 {
916 const char *helper;
917 struct transport *ret = xcalloc(1, sizeof(*ret));
918
919 ret->progress = isatty(2);
920
921 if (!remote)
922 BUG("No remote provided to transport_get()");
923
924 ret->got_remote_refs = 0;
925 ret->remote = remote;
926 helper = remote->foreign_vcs;
927
928 if (!url && remote->url)
929 url = remote->url[0];
930 ret->url = url;
931
932 /* maybe it is a foreign URL? */
933 if (url) {
934 const char *p = url;
935
936 while (is_urlschemechar(p == url, *p))
937 p++;
938 if (starts_with(p, "::"))
939 helper = xstrndup(url, p - url);
940 }
941
942 if (helper) {
943 transport_helper_init(ret, helper);
944 } else if (starts_with(url, "rsync:")) {
945 die(_("git-over-rsync is no longer supported"));
946 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
947 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
948 transport_check_allowed("file");
949 ret->data = data;
950 ret->vtable = &bundle_vtable;
951 ret->smart_options = NULL;
952 } else if (!is_url(url)
953 || starts_with(url, "file://")
954 || starts_with(url, "git://")
955 || starts_with(url, "ssh://")
956 || starts_with(url, "git+ssh://") /* deprecated - do not use */
957 || starts_with(url, "ssh+git://") /* deprecated - do not use */
958 ) {
959 /*
960 * These are builtin smart transports; "allowed" transports
961 * will be checked individually in git_connect.
962 */
963 struct git_transport_data *data = xcalloc(1, sizeof(*data));
964 ret->data = data;
965 ret->vtable = &builtin_smart_vtable;
966 ret->smart_options = &(data->options);
967
968 data->conn = NULL;
969 data->got_remote_heads = 0;
970 } else {
971 /* Unknown protocol in URL. Pass to external handler. */
972 int len = external_specification_len(url);
973 char *handler = xmemdupz(url, len);
974 transport_helper_init(ret, handler);
975 }
976
977 if (ret->smart_options) {
978 ret->smart_options->thin = 1;
979 ret->smart_options->uploadpack = "git-upload-pack";
980 if (remote->uploadpack)
981 ret->smart_options->uploadpack = remote->uploadpack;
982 ret->smart_options->receivepack = "git-receive-pack";
983 if (remote->receivepack)
984 ret->smart_options->receivepack = remote->receivepack;
985 }
986
987 return ret;
988 }
989
990 int transport_set_option(struct transport *transport,
991 const char *name, const char *value)
992 {
993 int git_reports = 1, protocol_reports = 1;
994
995 if (transport->smart_options)
996 git_reports = set_git_option(transport->smart_options,
997 name, value);
998
999 if (transport->vtable->set_option)
1000 protocol_reports = transport->vtable->set_option(transport,
1001 name, value);
1002
1003 /* If either report is 0, report 0 (success). */
1004 if (!git_reports || !protocol_reports)
1005 return 0;
1006 /* If either reports -1 (invalid value), report -1. */
1007 if ((git_reports == -1) || (protocol_reports == -1))
1008 return -1;
1009 /* Otherwise if both report unknown, report unknown. */
1010 return 1;
1011 }
1012
1013 void transport_set_verbosity(struct transport *transport, int verbosity,
1014 int force_progress)
1015 {
1016 if (verbosity >= 1)
1017 transport->verbose = verbosity <= 3 ? verbosity : 3;
1018 if (verbosity < 0)
1019 transport->verbose = -1;
1020
1021 /**
1022 * Rules used to determine whether to report progress (processing aborts
1023 * when a rule is satisfied):
1024 *
1025 * . Report progress, if force_progress is 1 (ie. --progress).
1026 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1027 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1028 * . Report progress if isatty(2) is 1.
1029 **/
1030 if (force_progress >= 0)
1031 transport->progress = !!force_progress;
1032 else
1033 transport->progress = verbosity >= 0 && isatty(2);
1034 }
1035
1036 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1037 {
1038 int i;
1039
1040 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1041 "not be found on any remote:\n"));
1042 for (i = 0; i < needs_pushing->nr; i++)
1043 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1044 fprintf(stderr, _("\nPlease try\n\n"
1045 " git push --recurse-submodules=on-demand\n\n"
1046 "or cd to the path and use\n\n"
1047 " git push\n\n"
1048 "to push them to a remote.\n\n"));
1049
1050 string_list_clear(needs_pushing, 0);
1051
1052 die(_("Aborting."));
1053 }
1054
1055 static int run_pre_push_hook(struct transport *transport,
1056 struct ref *remote_refs)
1057 {
1058 int ret = 0, x;
1059 struct ref *r;
1060 struct child_process proc = CHILD_PROCESS_INIT;
1061 struct strbuf buf;
1062 const char *argv[4];
1063
1064 if (!(argv[0] = find_hook("pre-push")))
1065 return 0;
1066
1067 argv[1] = transport->remote->name;
1068 argv[2] = transport->url;
1069 argv[3] = NULL;
1070
1071 proc.argv = argv;
1072 proc.in = -1;
1073 proc.trace2_hook_name = "pre-push";
1074
1075 if (start_command(&proc)) {
1076 finish_command(&proc);
1077 return -1;
1078 }
1079
1080 sigchain_push(SIGPIPE, SIG_IGN);
1081
1082 strbuf_init(&buf, 256);
1083
1084 for (r = remote_refs; r; r = r->next) {
1085 if (!r->peer_ref) continue;
1086 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1087 if (r->status == REF_STATUS_REJECT_STALE) continue;
1088 if (r->status == REF_STATUS_UPTODATE) continue;
1089
1090 strbuf_reset(&buf);
1091 strbuf_addf( &buf, "%s %s %s %s\n",
1092 r->peer_ref->name, oid_to_hex(&r->new_oid),
1093 r->name, oid_to_hex(&r->old_oid));
1094
1095 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1096 /* We do not mind if a hook does not read all refs. */
1097 if (errno != EPIPE)
1098 ret = -1;
1099 break;
1100 }
1101 }
1102
1103 strbuf_release(&buf);
1104
1105 x = close(proc.in);
1106 if (!ret)
1107 ret = x;
1108
1109 sigchain_pop(SIGPIPE);
1110
1111 x = finish_command(&proc);
1112 if (!ret)
1113 ret = x;
1114
1115 return ret;
1116 }
1117
1118 int transport_push(struct repository *r,
1119 struct transport *transport,
1120 struct refspec *rs, int flags,
1121 unsigned int *reject_reasons)
1122 {
1123 *reject_reasons = 0;
1124
1125 if (transport_color_config() < 0)
1126 return -1;
1127
1128 if (transport->vtable->push_refs) {
1129 struct ref *remote_refs;
1130 struct ref *local_refs = get_local_heads();
1131 int match_flags = MATCH_REFS_NONE;
1132 int verbose = (transport->verbose > 0);
1133 int quiet = (transport->verbose < 0);
1134 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1135 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1136 int push_ret, ret, err;
1137 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1138
1139 if (check_push_refs(local_refs, rs) < 0)
1140 return -1;
1141
1142 refspec_ref_prefixes(rs, &ref_prefixes);
1143
1144 remote_refs = transport->vtable->get_refs_list(transport, 1,
1145 &ref_prefixes);
1146
1147 argv_array_clear(&ref_prefixes);
1148
1149 if (flags & TRANSPORT_PUSH_ALL)
1150 match_flags |= MATCH_REFS_ALL;
1151 if (flags & TRANSPORT_PUSH_MIRROR)
1152 match_flags |= MATCH_REFS_MIRROR;
1153 if (flags & TRANSPORT_PUSH_PRUNE)
1154 match_flags |= MATCH_REFS_PRUNE;
1155 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1156 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1157
1158 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1159 return -1;
1160
1161 if (transport->smart_options &&
1162 transport->smart_options->cas &&
1163 !is_empty_cas(transport->smart_options->cas))
1164 apply_push_cas(transport->smart_options->cas,
1165 transport->remote, remote_refs);
1166
1167 set_ref_status_for_push(remote_refs,
1168 flags & TRANSPORT_PUSH_MIRROR,
1169 flags & TRANSPORT_PUSH_FORCE);
1170
1171 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1172 if (run_pre_push_hook(transport, remote_refs))
1173 return -1;
1174
1175 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1176 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1177 !is_bare_repository()) {
1178 struct ref *ref = remote_refs;
1179 struct oid_array commits = OID_ARRAY_INIT;
1180
1181 for (; ref; ref = ref->next)
1182 if (!is_null_oid(&ref->new_oid))
1183 oid_array_append(&commits,
1184 &ref->new_oid);
1185
1186 if (!push_unpushed_submodules(r,
1187 &commits,
1188 transport->remote,
1189 rs,
1190 transport->push_options,
1191 pretend)) {
1192 oid_array_clear(&commits);
1193 die(_("failed to push all needed submodules"));
1194 }
1195 oid_array_clear(&commits);
1196 }
1197
1198 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1199 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1200 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1201 !pretend)) && !is_bare_repository()) {
1202 struct ref *ref = remote_refs;
1203 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1204 struct oid_array commits = OID_ARRAY_INIT;
1205
1206 for (; ref; ref = ref->next)
1207 if (!is_null_oid(&ref->new_oid))
1208 oid_array_append(&commits,
1209 &ref->new_oid);
1210
1211 if (find_unpushed_submodules(r,
1212 &commits,
1213 transport->remote->name,
1214 &needs_pushing)) {
1215 oid_array_clear(&commits);
1216 die_with_unpushed_submodules(&needs_pushing);
1217 }
1218 string_list_clear(&needs_pushing, 0);
1219 oid_array_clear(&commits);
1220 }
1221
1222 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1223 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1224 else
1225 push_ret = 0;
1226 err = push_had_errors(remote_refs);
1227 ret = push_ret | err;
1228
1229 if ((flags & TRANSPORT_PUSH_ATOMIC) && err) {
1230 struct ref *it;
1231 for (it = remote_refs; it; it = it->next)
1232 switch (it->status) {
1233 case REF_STATUS_NONE:
1234 case REF_STATUS_UPTODATE:
1235 case REF_STATUS_OK:
1236 it->status = REF_STATUS_ATOMIC_PUSH_FAILED;
1237 break;
1238 default:
1239 break;
1240 }
1241 }
1242
1243 if (!quiet || err)
1244 transport_print_push_status(transport->url, remote_refs,
1245 verbose | porcelain, porcelain,
1246 reject_reasons);
1247
1248 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1249 set_upstreams(transport, remote_refs, pretend);
1250
1251 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1252 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1253 struct ref *ref;
1254 for (ref = remote_refs; ref; ref = ref->next)
1255 transport_update_tracking_ref(transport->remote, ref, verbose);
1256 }
1257
1258 if (porcelain && !push_ret)
1259 puts("Done");
1260 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1261 fprintf(stderr, "Everything up-to-date\n");
1262
1263 return ret;
1264 }
1265 return 1;
1266 }
1267
1268 const struct ref *transport_get_remote_refs(struct transport *transport,
1269 const struct argv_array *ref_prefixes)
1270 {
1271 if (!transport->got_remote_refs) {
1272 transport->remote_refs =
1273 transport->vtable->get_refs_list(transport, 0,
1274 ref_prefixes);
1275 transport->got_remote_refs = 1;
1276 }
1277
1278 return transport->remote_refs;
1279 }
1280
1281 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1282 {
1283 int rc;
1284 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1285 struct ref **heads = NULL;
1286 struct ref *rm;
1287
1288 if (!transport->vtable->fetch_without_list)
1289 /*
1290 * Some transports (e.g. the built-in bundle transport and the
1291 * transport helper interface) do not work when fetching is
1292 * done immediately after transport creation. List the remote
1293 * refs anyway (if not already listed) as a workaround.
1294 */
1295 transport_get_remote_refs(transport, NULL);
1296
1297 for (rm = refs; rm; rm = rm->next) {
1298 nr_refs++;
1299 if (rm->peer_ref &&
1300 !is_null_oid(&rm->old_oid) &&
1301 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1302 continue;
1303 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1304 heads[nr_heads++] = rm;
1305 }
1306
1307 if (!nr_heads) {
1308 /*
1309 * When deepening of a shallow repository is requested,
1310 * then local and remote refs are likely to still be equal.
1311 * Just feed them all to the fetch method in that case.
1312 * This condition shouldn't be met in a non-deepening fetch
1313 * (see builtin/fetch.c:quickfetch()).
1314 */
1315 ALLOC_ARRAY(heads, nr_refs);
1316 for (rm = refs; rm; rm = rm->next)
1317 heads[nr_heads++] = rm;
1318 }
1319
1320 rc = transport->vtable->fetch(transport, nr_heads, heads);
1321
1322 free(heads);
1323 return rc;
1324 }
1325
1326 void transport_unlock_pack(struct transport *transport)
1327 {
1328 if (transport->pack_lockfile) {
1329 unlink_or_warn(transport->pack_lockfile);
1330 FREE_AND_NULL(transport->pack_lockfile);
1331 }
1332 }
1333
1334 int transport_connect(struct transport *transport, const char *name,
1335 const char *exec, int fd[2])
1336 {
1337 if (transport->vtable->connect)
1338 return transport->vtable->connect(transport, name, exec, fd);
1339 else
1340 die(_("operation not supported by protocol"));
1341 }
1342
1343 int transport_disconnect(struct transport *transport)
1344 {
1345 int ret = 0;
1346 if (transport->vtable->disconnect)
1347 ret = transport->vtable->disconnect(transport);
1348 free(transport);
1349 return ret;
1350 }
1351
1352 /*
1353 * Strip username (and password) from a URL and return
1354 * it in a newly allocated string.
1355 */
1356 char *transport_anonymize_url(const char *url)
1357 {
1358 char *scheme_prefix, *anon_part;
1359 size_t anon_len, prefix_len = 0;
1360
1361 anon_part = strchr(url, '@');
1362 if (url_is_local_not_ssh(url) || !anon_part)
1363 goto literal_copy;
1364
1365 anon_len = strlen(++anon_part);
1366 scheme_prefix = strstr(url, "://");
1367 if (!scheme_prefix) {
1368 if (!strchr(anon_part, ':'))
1369 /* cannot be "me@there:/path/name" */
1370 goto literal_copy;
1371 } else {
1372 const char *cp;
1373 /* make sure scheme is reasonable */
1374 for (cp = url; cp < scheme_prefix; cp++) {
1375 switch (*cp) {
1376 /* RFC 1738 2.1 */
1377 case '+': case '.': case '-':
1378 break; /* ok */
1379 default:
1380 if (isalnum(*cp))
1381 break;
1382 /* it isn't */
1383 goto literal_copy;
1384 }
1385 }
1386 /* @ past the first slash does not count */
1387 cp = strchr(scheme_prefix + 3, '/');
1388 if (cp && cp < anon_part)
1389 goto literal_copy;
1390 prefix_len = scheme_prefix - url + 3;
1391 }
1392 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1393 (int)anon_len, anon_part);
1394 literal_copy:
1395 return xstrdup(url);
1396 }
1397
1398 static void fill_alternate_refs_command(struct child_process *cmd,
1399 const char *repo_path)
1400 {
1401 const char *value;
1402
1403 if (!git_config_get_value("core.alternateRefsCommand", &value)) {
1404 cmd->use_shell = 1;
1405
1406 argv_array_push(&cmd->args, value);
1407 argv_array_push(&cmd->args, repo_path);
1408 } else {
1409 cmd->git_cmd = 1;
1410
1411 argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path);
1412 argv_array_push(&cmd->args, "for-each-ref");
1413 argv_array_push(&cmd->args, "--format=%(objectname)");
1414
1415 if (!git_config_get_value("core.alternateRefsPrefixes", &value)) {
1416 argv_array_push(&cmd->args, "--");
1417 argv_array_split(&cmd->args, value);
1418 }
1419 }
1420
1421 cmd->env = local_repo_env;
1422 cmd->out = -1;
1423 }
1424
1425 static void read_alternate_refs(const char *path,
1426 alternate_ref_fn *cb,
1427 void *data)
1428 {
1429 struct child_process cmd = CHILD_PROCESS_INIT;
1430 struct strbuf line = STRBUF_INIT;
1431 FILE *fh;
1432
1433 fill_alternate_refs_command(&cmd, path);
1434
1435 if (start_command(&cmd))
1436 return;
1437
1438 fh = xfdopen(cmd.out, "r");
1439 while (strbuf_getline_lf(&line, fh) != EOF) {
1440 struct object_id oid;
1441 const char *p;
1442
1443 if (parse_oid_hex(line.buf, &oid, &p) || *p) {
1444 warning(_("invalid line while parsing alternate refs: %s"),
1445 line.buf);
1446 break;
1447 }
1448
1449 cb(&oid, data);
1450 }
1451
1452 fclose(fh);
1453 finish_command(&cmd);
1454 }
1455
1456 struct alternate_refs_data {
1457 alternate_ref_fn *fn;
1458 void *data;
1459 };
1460
1461 static int refs_from_alternate_cb(struct object_directory *e,
1462 void *data)
1463 {
1464 struct strbuf path = STRBUF_INIT;
1465 size_t base_len;
1466 struct alternate_refs_data *cb = data;
1467
1468 if (!strbuf_realpath(&path, e->path, 0))
1469 goto out;
1470 if (!strbuf_strip_suffix(&path, "/objects"))
1471 goto out;
1472 base_len = path.len;
1473
1474 /* Is this a git repository with refs? */
1475 strbuf_addstr(&path, "/refs");
1476 if (!is_directory(path.buf))
1477 goto out;
1478 strbuf_setlen(&path, base_len);
1479
1480 read_alternate_refs(path.buf, cb->fn, cb->data);
1481
1482 out:
1483 strbuf_release(&path);
1484 return 0;
1485 }
1486
1487 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1488 {
1489 struct alternate_refs_data cb;
1490 cb.fn = fn;
1491 cb.data = data;
1492 foreach_alt_odb(refs_from_alternate_cb, &cb);
1493 }
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