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treewide: rename 'EXCL_FLAG_' to 'PATTERN_FLAG_'
[git.git] / transport.c
blobee7dd1c062fc90b1f8f6a3fd4f3518d9aff58a83
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 list_objects_filter_die_if_populated(&opts->filter_options);
228 parse_list_objects_filter(&opts->filter_options, value);
229 return 0;
230 }
231 return 1;
232 }
233
234 static int connect_setup(struct transport *transport, int for_push)
235 {
236 struct git_transport_data *data = transport->data;
237 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
238
239 if (data->conn)
240 return 0;
241
242 switch (transport->family) {
243 case TRANSPORT_FAMILY_ALL: break;
244 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
245 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
246 }
247
248 data->conn = git_connect(data->fd, transport->url,
249 for_push ? data->options.receivepack :
250 data->options.uploadpack,
251 flags);
252
253 return 0;
254 }
255
256 static void die_if_server_options(struct transport *transport)
257 {
258 if (!transport->server_options || !transport->server_options->nr)
259 return;
260 advise(_("see protocol.version in 'git help config' for more details"));
261 die(_("server options require protocol version 2 or later"));
262 }
263
264 /*
265 * Obtains the protocol version from the transport and writes it to
266 * transport->data->version, first connecting if not already connected.
267 *
268 * If the protocol version is one that allows skipping the listing of remote
269 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
270 * this function returns NULL. Otherwise, this function returns the list of
271 * remote refs.
272 */
273 static struct ref *handshake(struct transport *transport, int for_push,
274 const struct argv_array *ref_prefixes,
275 int must_list_refs)
276 {
277 struct git_transport_data *data = transport->data;
278 struct ref *refs = NULL;
279 struct packet_reader reader;
280
281 connect_setup(transport, for_push);
282
283 packet_reader_init(&reader, data->fd[0], NULL, 0,
284 PACKET_READ_CHOMP_NEWLINE |
285 PACKET_READ_GENTLE_ON_EOF |
286 PACKET_READ_DIE_ON_ERR_PACKET);
287
288 data->version = discover_version(&reader);
289 switch (data->version) {
290 case protocol_v2:
291 if (must_list_refs)
292 get_remote_refs(data->fd[1], &reader, &refs, for_push,
293 ref_prefixes,
294 transport->server_options);
295 break;
296 case protocol_v1:
297 case protocol_v0:
298 die_if_server_options(transport);
299 get_remote_heads(&reader, &refs,
300 for_push ? REF_NORMAL : 0,
301 &data->extra_have,
302 &data->shallow);
303 break;
304 case protocol_unknown_version:
305 BUG("unknown protocol version");
306 }
307 data->got_remote_heads = 1;
308
309 if (reader.line_peeked)
310 BUG("buffer must be empty at the end of handshake()");
311
312 return refs;
313 }
314
315 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
316 const struct argv_array *ref_prefixes)
317 {
318 return handshake(transport, for_push, ref_prefixes, 1);
319 }
320
321 static int fetch_refs_via_pack(struct transport *transport,
322 int nr_heads, struct ref **to_fetch)
323 {
324 int ret = 0;
325 struct git_transport_data *data = transport->data;
326 struct ref *refs = NULL;
327 struct fetch_pack_args args;
328 struct ref *refs_tmp = NULL;
329
330 memset(&args, 0, sizeof(args));
331 args.uploadpack = data->options.uploadpack;
332 args.keep_pack = data->options.keep;
333 args.lock_pack = 1;
334 args.use_thin_pack = data->options.thin;
335 args.include_tag = data->options.followtags;
336 args.verbose = (transport->verbose > 1);
337 args.quiet = (transport->verbose < 0);
338 args.no_progress = !transport->progress;
339 args.depth = data->options.depth;
340 args.deepen_since = data->options.deepen_since;
341 args.deepen_not = data->options.deepen_not;
342 args.deepen_relative = data->options.deepen_relative;
343 args.check_self_contained_and_connected =
344 data->options.check_self_contained_and_connected;
345 args.cloning = transport->cloning;
346 args.update_shallow = data->options.update_shallow;
347 args.from_promisor = data->options.from_promisor;
348 args.no_dependents = data->options.no_dependents;
349 args.filter_options = data->options.filter_options;
350 args.stateless_rpc = transport->stateless_rpc;
351 args.server_options = transport->server_options;
352 args.negotiation_tips = data->options.negotiation_tips;
353
354 if (!data->got_remote_heads) {
355 int i;
356 int must_list_refs = 0;
357 for (i = 0; i < nr_heads; i++) {
358 if (!to_fetch[i]->exact_oid) {
359 must_list_refs = 1;
360 break;
361 }
362 }
363 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
364 }
365
366 switch (data->version) {
367 case protocol_v2:
368 refs = fetch_pack(&args, data->fd,
369 refs_tmp ? refs_tmp : transport->remote_refs,
370 to_fetch, nr_heads, &data->shallow,
371 &transport->pack_lockfile, data->version);
372 break;
373 case protocol_v1:
374 case protocol_v0:
375 die_if_server_options(transport);
376 refs = fetch_pack(&args, data->fd,
377 refs_tmp ? refs_tmp : transport->remote_refs,
378 to_fetch, nr_heads, &data->shallow,
379 &transport->pack_lockfile, data->version);
380 break;
381 case protocol_unknown_version:
382 BUG("unknown protocol version");
383 }
384
385 close(data->fd[0]);
386 close(data->fd[1]);
387 if (finish_connect(data->conn))
388 ret = -1;
389 data->conn = NULL;
390 data->got_remote_heads = 0;
391 data->options.self_contained_and_connected =
392 args.self_contained_and_connected;
393 data->options.connectivity_checked = args.connectivity_checked;
394
395 if (refs == NULL)
396 ret = -1;
397 if (report_unmatched_refs(to_fetch, nr_heads))
398 ret = -1;
399
400 free_refs(refs_tmp);
401 free_refs(refs);
402 return ret;
403 }
404
405 static int push_had_errors(struct ref *ref)
406 {
407 for (; ref; ref = ref->next) {
408 switch (ref->status) {
409 case REF_STATUS_NONE:
410 case REF_STATUS_UPTODATE:
411 case REF_STATUS_OK:
412 break;
413 default:
414 return 1;
415 }
416 }
417 return 0;
418 }
419
420 int transport_refs_pushed(struct ref *ref)
421 {
422 for (; ref; ref = ref->next) {
423 switch(ref->status) {
424 case REF_STATUS_NONE:
425 case REF_STATUS_UPTODATE:
426 break;
427 default:
428 return 1;
429 }
430 }
431 return 0;
432 }
433
434 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
435 {
436 struct refspec_item rs;
437
438 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
439 return;
440
441 rs.src = ref->name;
442 rs.dst = NULL;
443
444 if (!remote_find_tracking(remote, &rs)) {
445 if (verbose)
446 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
447 if (ref->deletion) {
448 delete_ref(NULL, rs.dst, NULL, 0);
449 } else
450 update_ref("update by push", rs.dst, &ref->new_oid,
451 NULL, 0, 0);
452 free(rs.dst);
453 }
454 }
455
456 static void print_ref_status(char flag, const char *summary,
457 struct ref *to, struct ref *from, const char *msg,
458 int porcelain, int summary_width)
459 {
460 if (porcelain) {
461 if (from)
462 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
463 else
464 fprintf(stdout, "%c\t:%s\t", flag, to->name);
465 if (msg)
466 fprintf(stdout, "%s (%s)\n", summary, msg);
467 else
468 fprintf(stdout, "%s\n", summary);
469 } else {
470 const char *red = "", *reset = "";
471 if (push_had_errors(to)) {
472 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
473 reset = transport_get_color(TRANSPORT_COLOR_RESET);
474 }
475 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
476 summary, reset);
477 if (from)
478 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
479 else
480 fputs(prettify_refname(to->name), stderr);
481 if (msg) {
482 fputs(" (", stderr);
483 fputs(msg, stderr);
484 fputc(')', stderr);
485 }
486 fputc('\n', stderr);
487 }
488 }
489
490 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
491 {
492 if (ref->deletion)
493 print_ref_status('-', "[deleted]", ref, NULL, NULL,
494 porcelain, summary_width);
495 else if (is_null_oid(&ref->old_oid))
496 print_ref_status('*',
497 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
498 "[new branch]"),
499 ref, ref->peer_ref, NULL, porcelain, summary_width);
500 else {
501 struct strbuf quickref = STRBUF_INIT;
502 char type;
503 const char *msg;
504
505 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
506 DEFAULT_ABBREV);
507 if (ref->forced_update) {
508 strbuf_addstr(&quickref, "...");
509 type = '+';
510 msg = "forced update";
511 } else {
512 strbuf_addstr(&quickref, "..");
513 type = ' ';
514 msg = NULL;
515 }
516 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
517 DEFAULT_ABBREV);
518
519 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
520 porcelain, summary_width);
521 strbuf_release(&quickref);
522 }
523 }
524
525 static int print_one_push_status(struct ref *ref, const char *dest, int count,
526 int porcelain, int summary_width)
527 {
528 if (!count) {
529 char *url = transport_anonymize_url(dest);
530 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
531 free(url);
532 }
533
534 switch(ref->status) {
535 case REF_STATUS_NONE:
536 print_ref_status('X', "[no match]", ref, NULL, NULL,
537 porcelain, summary_width);
538 break;
539 case REF_STATUS_REJECT_NODELETE:
540 print_ref_status('!', "[rejected]", ref, NULL,
541 "remote does not support deleting refs",
542 porcelain, summary_width);
543 break;
544 case REF_STATUS_UPTODATE:
545 print_ref_status('=', "[up to date]", ref,
546 ref->peer_ref, NULL, porcelain, summary_width);
547 break;
548 case REF_STATUS_REJECT_NONFASTFORWARD:
549 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
550 "non-fast-forward", porcelain, summary_width);
551 break;
552 case REF_STATUS_REJECT_ALREADY_EXISTS:
553 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
554 "already exists", porcelain, summary_width);
555 break;
556 case REF_STATUS_REJECT_FETCH_FIRST:
557 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
558 "fetch first", porcelain, summary_width);
559 break;
560 case REF_STATUS_REJECT_NEEDS_FORCE:
561 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
562 "needs force", porcelain, summary_width);
563 break;
564 case REF_STATUS_REJECT_STALE:
565 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
566 "stale info", porcelain, summary_width);
567 break;
568 case REF_STATUS_REJECT_SHALLOW:
569 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
570 "new shallow roots not allowed",
571 porcelain, summary_width);
572 break;
573 case REF_STATUS_REMOTE_REJECT:
574 print_ref_status('!', "[remote rejected]", ref,
575 ref->deletion ? NULL : ref->peer_ref,
576 ref->remote_status, porcelain, summary_width);
577 break;
578 case REF_STATUS_EXPECTING_REPORT:
579 print_ref_status('!', "[remote failure]", ref,
580 ref->deletion ? NULL : ref->peer_ref,
581 "remote failed to report status",
582 porcelain, summary_width);
583 break;
584 case REF_STATUS_ATOMIC_PUSH_FAILED:
585 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
586 "atomic push failed", porcelain, summary_width);
587 break;
588 case REF_STATUS_OK:
589 print_ok_ref_status(ref, porcelain, summary_width);
590 break;
591 }
592
593 return 1;
594 }
595
596 static int measure_abbrev(const struct object_id *oid, int sofar)
597 {
598 char hex[GIT_MAX_HEXSZ + 1];
599 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
600
601 return (w < sofar) ? sofar : w;
602 }
603
604 int transport_summary_width(const struct ref *refs)
605 {
606 int maxw = -1;
607
608 for (; refs; refs = refs->next) {
609 maxw = measure_abbrev(&refs->old_oid, maxw);
610 maxw = measure_abbrev(&refs->new_oid, maxw);
611 }
612 if (maxw < 0)
613 maxw = FALLBACK_DEFAULT_ABBREV;
614 return (2 * maxw + 3);
615 }
616
617 void transport_print_push_status(const char *dest, struct ref *refs,
618 int verbose, int porcelain, unsigned int *reject_reasons)
619 {
620 struct ref *ref;
621 int n = 0;
622 char *head;
623 int summary_width = transport_summary_width(refs);
624
625 if (transport_color_config() < 0)
626 warning(_("could not parse transport.color.* config"));
627
628 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
629
630 if (verbose) {
631 for (ref = refs; ref; ref = ref->next)
632 if (ref->status == REF_STATUS_UPTODATE)
633 n += print_one_push_status(ref, dest, n,
634 porcelain, summary_width);
635 }
636
637 for (ref = refs; ref; ref = ref->next)
638 if (ref->status == REF_STATUS_OK)
639 n += print_one_push_status(ref, dest, n,
640 porcelain, summary_width);
641
642 *reject_reasons = 0;
643 for (ref = refs; ref; ref = ref->next) {
644 if (ref->status != REF_STATUS_NONE &&
645 ref->status != REF_STATUS_UPTODATE &&
646 ref->status != REF_STATUS_OK)
647 n += print_one_push_status(ref, dest, n,
648 porcelain, summary_width);
649 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
650 if (head != NULL && !strcmp(head, ref->name))
651 *reject_reasons |= REJECT_NON_FF_HEAD;
652 else
653 *reject_reasons |= REJECT_NON_FF_OTHER;
654 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
655 *reject_reasons |= REJECT_ALREADY_EXISTS;
656 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
657 *reject_reasons |= REJECT_FETCH_FIRST;
658 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
659 *reject_reasons |= REJECT_NEEDS_FORCE;
660 }
661 }
662 free(head);
663 }
664
665 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
666 {
667 struct git_transport_data *data = transport->data;
668 struct send_pack_args args;
669 int ret = 0;
670
671 if (transport_color_config() < 0)
672 return -1;
673
674 if (!data->got_remote_heads)
675 get_refs_via_connect(transport, 1, NULL);
676
677 memset(&args, 0, sizeof(args));
678 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
679 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
680 args.use_thin_pack = data->options.thin;
681 args.verbose = (transport->verbose > 0);
682 args.quiet = (transport->verbose < 0);
683 args.progress = transport->progress;
684 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
685 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
686 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
687 args.push_options = transport->push_options;
688 args.url = transport->url;
689
690 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
691 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
692 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
693 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
694 else
695 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
696
697 switch (data->version) {
698 case protocol_v2:
699 die(_("support for protocol v2 not implemented yet"));
700 break;
701 case protocol_v1:
702 case protocol_v0:
703 ret = send_pack(&args, data->fd, data->conn, remote_refs,
704 &data->extra_have);
705 break;
706 case protocol_unknown_version:
707 BUG("unknown protocol version");
708 }
709
710 close(data->fd[1]);
711 close(data->fd[0]);
712 ret |= finish_connect(data->conn);
713 data->conn = NULL;
714 data->got_remote_heads = 0;
715
716 return ret;
717 }
718
719 static int connect_git(struct transport *transport, const char *name,
720 const char *executable, int fd[2])
721 {
722 struct git_transport_data *data = transport->data;
723 data->conn = git_connect(data->fd, transport->url,
724 executable, 0);
725 fd[0] = data->fd[0];
726 fd[1] = data->fd[1];
727 return 0;
728 }
729
730 static int disconnect_git(struct transport *transport)
731 {
732 struct git_transport_data *data = transport->data;
733 if (data->conn) {
734 if (data->got_remote_heads)
735 packet_flush(data->fd[1]);
736 close(data->fd[0]);
737 close(data->fd[1]);
738 finish_connect(data->conn);
739 }
740
741 free(data);
742 return 0;
743 }
744
745 static struct transport_vtable taken_over_vtable = {
746 1,
747 NULL,
748 get_refs_via_connect,
749 fetch_refs_via_pack,
750 git_transport_push,
751 NULL,
752 disconnect_git
753 };
754
755 void transport_take_over(struct transport *transport,
756 struct child_process *child)
757 {
758 struct git_transport_data *data;
759
760 if (!transport->smart_options)
761 BUG("taking over transport requires non-NULL "
762 "smart_options field.");
763
764 data = xcalloc(1, sizeof(*data));
765 data->options = *transport->smart_options;
766 data->conn = child;
767 data->fd[0] = data->conn->out;
768 data->fd[1] = data->conn->in;
769 data->got_remote_heads = 0;
770 transport->data = data;
771
772 transport->vtable = &taken_over_vtable;
773 transport->smart_options = &(data->options);
774
775 transport->cannot_reuse = 1;
776 }
777
778 static int is_file(const char *url)
779 {
780 struct stat buf;
781 if (stat(url, &buf))
782 return 0;
783 return S_ISREG(buf.st_mode);
784 }
785
786 static int external_specification_len(const char *url)
787 {
788 return strchr(url, ':') - url;
789 }
790
791 static const struct string_list *protocol_whitelist(void)
792 {
793 static int enabled = -1;
794 static struct string_list allowed = STRING_LIST_INIT_DUP;
795
796 if (enabled < 0) {
797 const char *v = getenv("GIT_ALLOW_PROTOCOL");
798 if (v) {
799 string_list_split(&allowed, v, ':', -1);
800 string_list_sort(&allowed);
801 enabled = 1;
802 } else {
803 enabled = 0;
804 }
805 }
806
807 return enabled ? &allowed : NULL;
808 }
809
810 enum protocol_allow_config {
811 PROTOCOL_ALLOW_NEVER = 0,
812 PROTOCOL_ALLOW_USER_ONLY,
813 PROTOCOL_ALLOW_ALWAYS
814 };
815
816 static enum protocol_allow_config parse_protocol_config(const char *key,
817 const char *value)
818 {
819 if (!strcasecmp(value, "always"))
820 return PROTOCOL_ALLOW_ALWAYS;
821 else if (!strcasecmp(value, "never"))
822 return PROTOCOL_ALLOW_NEVER;
823 else if (!strcasecmp(value, "user"))
824 return PROTOCOL_ALLOW_USER_ONLY;
825
826 die(_("unknown value for config '%s': %s"), key, value);
827 }
828
829 static enum protocol_allow_config get_protocol_config(const char *type)
830 {
831 char *key = xstrfmt("protocol.%s.allow", type);
832 char *value;
833
834 /* first check the per-protocol config */
835 if (!git_config_get_string(key, &value)) {
836 enum protocol_allow_config ret =
837 parse_protocol_config(key, value);
838 free(key);
839 free(value);
840 return ret;
841 }
842 free(key);
843
844 /* if defined, fallback to user-defined default for unknown protocols */
845 if (!git_config_get_string("protocol.allow", &value)) {
846 enum protocol_allow_config ret =
847 parse_protocol_config("protocol.allow", value);
848 free(value);
849 return ret;
850 }
851
852 /* fallback to built-in defaults */
853 /* known safe */
854 if (!strcmp(type, "http") ||
855 !strcmp(type, "https") ||
856 !strcmp(type, "git") ||
857 !strcmp(type, "ssh") ||
858 !strcmp(type, "file"))
859 return PROTOCOL_ALLOW_ALWAYS;
860
861 /* known scary; err on the side of caution */
862 if (!strcmp(type, "ext"))
863 return PROTOCOL_ALLOW_NEVER;
864
865 /* unknown; by default let them be used only directly by the user */
866 return PROTOCOL_ALLOW_USER_ONLY;
867 }
868
869 int is_transport_allowed(const char *type, int from_user)
870 {
871 const struct string_list *whitelist = protocol_whitelist();
872 if (whitelist)
873 return string_list_has_string(whitelist, type);
874
875 switch (get_protocol_config(type)) {
876 case PROTOCOL_ALLOW_ALWAYS:
877 return 1;
878 case PROTOCOL_ALLOW_NEVER:
879 return 0;
880 case PROTOCOL_ALLOW_USER_ONLY:
881 if (from_user < 0)
882 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
883 return from_user;
884 }
885
886 BUG("invalid protocol_allow_config type");
887 }
888
889 void transport_check_allowed(const char *type)
890 {
891 if (!is_transport_allowed(type, -1))
892 die(_("transport '%s' not allowed"), type);
893 }
894
895 static struct transport_vtable bundle_vtable = {
896 0,
897 NULL,
898 get_refs_from_bundle,
899 fetch_refs_from_bundle,
900 NULL,
901 NULL,
902 close_bundle
903 };
904
905 static struct transport_vtable builtin_smart_vtable = {
906 1,
907 NULL,
908 get_refs_via_connect,
909 fetch_refs_via_pack,
910 git_transport_push,
911 connect_git,
912 disconnect_git
913 };
914
915 struct transport *transport_get(struct remote *remote, const char *url)
916 {
917 const char *helper;
918 struct transport *ret = xcalloc(1, sizeof(*ret));
919
920 ret->progress = isatty(2);
921
922 if (!remote)
923 BUG("No remote provided to transport_get()");
924
925 ret->got_remote_refs = 0;
926 ret->remote = remote;
927 helper = remote->foreign_vcs;
928
929 if (!url && remote->url)
930 url = remote->url[0];
931 ret->url = url;
932
933 /* maybe it is a foreign URL? */
934 if (url) {
935 const char *p = url;
936
937 while (is_urlschemechar(p == url, *p))
938 p++;
939 if (starts_with(p, "::"))
940 helper = xstrndup(url, p - url);
941 }
942
943 if (helper) {
944 transport_helper_init(ret, helper);
945 } else if (starts_with(url, "rsync:")) {
946 die(_("git-over-rsync is no longer supported"));
947 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
948 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
949 transport_check_allowed("file");
950 ret->data = data;
951 ret->vtable = &bundle_vtable;
952 ret->smart_options = NULL;
953 } else if (!is_url(url)
954 || starts_with(url, "file://")
955 || starts_with(url, "git://")
956 || starts_with(url, "ssh://")
957 || starts_with(url, "git+ssh://") /* deprecated - do not use */
958 || starts_with(url, "ssh+git://") /* deprecated - do not use */
959 ) {
960 /*
961 * These are builtin smart transports; "allowed" transports
962 * will be checked individually in git_connect.
963 */
964 struct git_transport_data *data = xcalloc(1, sizeof(*data));
965 ret->data = data;
966 ret->vtable = &builtin_smart_vtable;
967 ret->smart_options = &(data->options);
968
969 data->conn = NULL;
970 data->got_remote_heads = 0;
971 } else {
972 /* Unknown protocol in URL. Pass to external handler. */
973 int len = external_specification_len(url);
974 char *handler = xmemdupz(url, len);
975 transport_helper_init(ret, handler);
976 }
977
978 if (ret->smart_options) {
979 ret->smart_options->thin = 1;
980 ret->smart_options->uploadpack = "git-upload-pack";
981 if (remote->uploadpack)
982 ret->smart_options->uploadpack = remote->uploadpack;
983 ret->smart_options->receivepack = "git-receive-pack";
984 if (remote->receivepack)
985 ret->smart_options->receivepack = remote->receivepack;
986 }
987
988 return ret;
989 }
990
991 int transport_set_option(struct transport *transport,
992 const char *name, const char *value)
993 {
994 int git_reports = 1, protocol_reports = 1;
995
996 if (transport->smart_options)
997 git_reports = set_git_option(transport->smart_options,
998 name, value);
999
1000 if (transport->vtable->set_option)
1001 protocol_reports = transport->vtable->set_option(transport,
1002 name, value);
1003
1004 /* If either report is 0, report 0 (success). */
1005 if (!git_reports || !protocol_reports)
1006 return 0;
1007 /* If either reports -1 (invalid value), report -1. */
1008 if ((git_reports == -1) || (protocol_reports == -1))
1009 return -1;
1010 /* Otherwise if both report unknown, report unknown. */
1011 return 1;
1012 }
1013
1014 void transport_set_verbosity(struct transport *transport, int verbosity,
1015 int force_progress)
1016 {
1017 if (verbosity >= 1)
1018 transport->verbose = verbosity <= 3 ? verbosity : 3;
1019 if (verbosity < 0)
1020 transport->verbose = -1;
1021
1022 /**
1023 * Rules used to determine whether to report progress (processing aborts
1024 * when a rule is satisfied):
1025 *
1026 * . Report progress, if force_progress is 1 (ie. --progress).
1027 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1028 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1029 * . Report progress if isatty(2) is 1.
1030 **/
1031 if (force_progress >= 0)
1032 transport->progress = !!force_progress;
1033 else
1034 transport->progress = verbosity >= 0 && isatty(2);
1035 }
1036
1037 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1038 {
1039 int i;
1040
1041 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1042 "not be found on any remote:\n"));
1043 for (i = 0; i < needs_pushing->nr; i++)
1044 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1045 fprintf(stderr, _("\nPlease try\n\n"
1046 " git push --recurse-submodules=on-demand\n\n"
1047 "or cd to the path and use\n\n"
1048 " git push\n\n"
1049 "to push them to a remote.\n\n"));
1050
1051 string_list_clear(needs_pushing, 0);
1052
1053 die(_("Aborting."));
1054 }
1055
1056 static int run_pre_push_hook(struct transport *transport,
1057 struct ref *remote_refs)
1058 {
1059 int ret = 0, x;
1060 struct ref *r;
1061 struct child_process proc = CHILD_PROCESS_INIT;
1062 struct strbuf buf;
1063 const char *argv[4];
1064
1065 if (!(argv[0] = find_hook("pre-push")))
1066 return 0;
1067
1068 argv[1] = transport->remote->name;
1069 argv[2] = transport->url;
1070 argv[3] = NULL;
1071
1072 proc.argv = argv;
1073 proc.in = -1;
1074 proc.trace2_hook_name = "pre-push";
1075
1076 if (start_command(&proc)) {
1077 finish_command(&proc);
1078 return -1;
1079 }
1080
1081 sigchain_push(SIGPIPE, SIG_IGN);
1082
1083 strbuf_init(&buf, 256);
1084
1085 for (r = remote_refs; r; r = r->next) {
1086 if (!r->peer_ref) continue;
1087 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1088 if (r->status == REF_STATUS_REJECT_STALE) continue;
1089 if (r->status == REF_STATUS_UPTODATE) continue;
1090
1091 strbuf_reset(&buf);
1092 strbuf_addf( &buf, "%s %s %s %s\n",
1093 r->peer_ref->name, oid_to_hex(&r->new_oid),
1094 r->name, oid_to_hex(&r->old_oid));
1095
1096 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1097 /* We do not mind if a hook does not read all refs. */
1098 if (errno != EPIPE)
1099 ret = -1;
1100 break;
1101 }
1102 }
1103
1104 strbuf_release(&buf);
1105
1106 x = close(proc.in);
1107 if (!ret)
1108 ret = x;
1109
1110 sigchain_pop(SIGPIPE);
1111
1112 x = finish_command(&proc);
1113 if (!ret)
1114 ret = x;
1115
1116 return ret;
1117 }
1118
1119 int transport_push(struct repository *r,
1120 struct transport *transport,
1121 struct refspec *rs, int flags,
1122 unsigned int *reject_reasons)
1123 {
1124 *reject_reasons = 0;
1125
1126 if (transport_color_config() < 0)
1127 return -1;
1128
1129 if (transport->vtable->push_refs) {
1130 struct ref *remote_refs;
1131 struct ref *local_refs = get_local_heads();
1132 int match_flags = MATCH_REFS_NONE;
1133 int verbose = (transport->verbose > 0);
1134 int quiet = (transport->verbose < 0);
1135 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1136 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1137 int push_ret, ret, err;
1138 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1139
1140 if (check_push_refs(local_refs, rs) < 0)
1141 return -1;
1142
1143 refspec_ref_prefixes(rs, &ref_prefixes);
1144
1145 remote_refs = transport->vtable->get_refs_list(transport, 1,
1146 &ref_prefixes);
1147
1148 argv_array_clear(&ref_prefixes);
1149
1150 if (flags & TRANSPORT_PUSH_ALL)
1151 match_flags |= MATCH_REFS_ALL;
1152 if (flags & TRANSPORT_PUSH_MIRROR)
1153 match_flags |= MATCH_REFS_MIRROR;
1154 if (flags & TRANSPORT_PUSH_PRUNE)
1155 match_flags |= MATCH_REFS_PRUNE;
1156 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1157 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1158
1159 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1160 return -1;
1161
1162 if (transport->smart_options &&
1163 transport->smart_options->cas &&
1164 !is_empty_cas(transport->smart_options->cas))
1165 apply_push_cas(transport->smart_options->cas,
1166 transport->remote, remote_refs);
1167
1168 set_ref_status_for_push(remote_refs,
1169 flags & TRANSPORT_PUSH_MIRROR,
1170 flags & TRANSPORT_PUSH_FORCE);
1171
1172 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1173 if (run_pre_push_hook(transport, remote_refs))
1174 return -1;
1175
1176 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1177 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1178 !is_bare_repository()) {
1179 struct ref *ref = remote_refs;
1180 struct oid_array commits = OID_ARRAY_INIT;
1181
1182 for (; ref; ref = ref->next)
1183 if (!is_null_oid(&ref->new_oid))
1184 oid_array_append(&commits,
1185 &ref->new_oid);
1186
1187 if (!push_unpushed_submodules(r,
1188 &commits,
1189 transport->remote,
1190 rs,
1191 transport->push_options,
1192 pretend)) {
1193 oid_array_clear(&commits);
1194 die(_("failed to push all needed submodules"));
1195 }
1196 oid_array_clear(&commits);
1197 }
1198
1199 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1200 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1201 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1202 !pretend)) && !is_bare_repository()) {
1203 struct ref *ref = remote_refs;
1204 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1205 struct oid_array commits = OID_ARRAY_INIT;
1206
1207 for (; ref; ref = ref->next)
1208 if (!is_null_oid(&ref->new_oid))
1209 oid_array_append(&commits,
1210 &ref->new_oid);
1211
1212 if (find_unpushed_submodules(r,
1213 &commits,
1214 transport->remote->name,
1215 &needs_pushing)) {
1216 oid_array_clear(&commits);
1217 die_with_unpushed_submodules(&needs_pushing);
1218 }
1219 string_list_clear(&needs_pushing, 0);
1220 oid_array_clear(&commits);
1221 }
1222
1223 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1224 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1225 else
1226 push_ret = 0;
1227 err = push_had_errors(remote_refs);
1228 ret = push_ret | err;
1229
1230 if (!quiet || err)
1231 transport_print_push_status(transport->url, remote_refs,
1232 verbose | porcelain, porcelain,
1233 reject_reasons);
1234
1235 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1236 set_upstreams(transport, remote_refs, pretend);
1237
1238 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1239 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1240 struct ref *ref;
1241 for (ref = remote_refs; ref; ref = ref->next)
1242 transport_update_tracking_ref(transport->remote, ref, verbose);
1243 }
1244
1245 if (porcelain && !push_ret)
1246 puts("Done");
1247 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1248 fprintf(stderr, "Everything up-to-date\n");
1249
1250 return ret;
1251 }
1252 return 1;
1253 }
1254
1255 const struct ref *transport_get_remote_refs(struct transport *transport,
1256 const struct argv_array *ref_prefixes)
1257 {
1258 if (!transport->got_remote_refs) {
1259 transport->remote_refs =
1260 transport->vtable->get_refs_list(transport, 0,
1261 ref_prefixes);
1262 transport->got_remote_refs = 1;
1263 }
1264
1265 return transport->remote_refs;
1266 }
1267
1268 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1269 {
1270 int rc;
1271 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1272 struct ref **heads = NULL;
1273 struct ref *rm;
1274
1275 if (!transport->vtable->fetch_without_list)
1276 /*
1277 * Some transports (e.g. the built-in bundle transport and the
1278 * transport helper interface) do not work when fetching is
1279 * done immediately after transport creation. List the remote
1280 * refs anyway (if not already listed) as a workaround.
1281 */
1282 transport_get_remote_refs(transport, NULL);
1283
1284 for (rm = refs; rm; rm = rm->next) {
1285 nr_refs++;
1286 if (rm->peer_ref &&
1287 !is_null_oid(&rm->old_oid) &&
1288 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1289 continue;
1290 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1291 heads[nr_heads++] = rm;
1292 }
1293
1294 if (!nr_heads) {
1295 /*
1296 * When deepening of a shallow repository is requested,
1297 * then local and remote refs are likely to still be equal.
1298 * Just feed them all to the fetch method in that case.
1299 * This condition shouldn't be met in a non-deepening fetch
1300 * (see builtin/fetch.c:quickfetch()).
1301 */
1302 ALLOC_ARRAY(heads, nr_refs);
1303 for (rm = refs; rm; rm = rm->next)
1304 heads[nr_heads++] = rm;
1305 }
1306
1307 rc = transport->vtable->fetch(transport, nr_heads, heads);
1308
1309 free(heads);
1310 return rc;
1311 }
1312
1313 void transport_unlock_pack(struct transport *transport)
1314 {
1315 if (transport->pack_lockfile) {
1316 unlink_or_warn(transport->pack_lockfile);
1317 FREE_AND_NULL(transport->pack_lockfile);
1318 }
1319 }
1320
1321 int transport_connect(struct transport *transport, const char *name,
1322 const char *exec, int fd[2])
1323 {
1324 if (transport->vtable->connect)
1325 return transport->vtable->connect(transport, name, exec, fd);
1326 else
1327 die(_("operation not supported by protocol"));
1328 }
1329
1330 int transport_disconnect(struct transport *transport)
1331 {
1332 int ret = 0;
1333 if (transport->vtable->disconnect)
1334 ret = transport->vtable->disconnect(transport);
1335 free(transport);
1336 return ret;
1337 }
1338
1339 /*
1340 * Strip username (and password) from a URL and return
1341 * it in a newly allocated string.
1342 */
1343 char *transport_anonymize_url(const char *url)
1344 {
1345 char *scheme_prefix, *anon_part;
1346 size_t anon_len, prefix_len = 0;
1347
1348 anon_part = strchr(url, '@');
1349 if (url_is_local_not_ssh(url) || !anon_part)
1350 goto literal_copy;
1351
1352 anon_len = strlen(++anon_part);
1353 scheme_prefix = strstr(url, "://");
1354 if (!scheme_prefix) {
1355 if (!strchr(anon_part, ':'))
1356 /* cannot be "me@there:/path/name" */
1357 goto literal_copy;
1358 } else {
1359 const char *cp;
1360 /* make sure scheme is reasonable */
1361 for (cp = url; cp < scheme_prefix; cp++) {
1362 switch (*cp) {
1363 /* RFC 1738 2.1 */
1364 case '+': case '.': case '-':
1365 break; /* ok */
1366 default:
1367 if (isalnum(*cp))
1368 break;
1369 /* it isn't */
1370 goto literal_copy;
1371 }
1372 }
1373 /* @ past the first slash does not count */
1374 cp = strchr(scheme_prefix + 3, '/');
1375 if (cp && cp < anon_part)
1376 goto literal_copy;
1377 prefix_len = scheme_prefix - url + 3;
1378 }
1379 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1380 (int)anon_len, anon_part);
1381 literal_copy:
1382 return xstrdup(url);
1383 }
1384
1385 static void fill_alternate_refs_command(struct child_process *cmd,
1386 const char *repo_path)
1387 {
1388 const char *value;
1389
1390 if (!git_config_get_value("core.alternateRefsCommand", &value)) {
1391 cmd->use_shell = 1;
1392
1393 argv_array_push(&cmd->args, value);
1394 argv_array_push(&cmd->args, repo_path);
1395 } else {
1396 cmd->git_cmd = 1;
1397
1398 argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path);
1399 argv_array_push(&cmd->args, "for-each-ref");
1400 argv_array_push(&cmd->args, "--format=%(objectname)");
1401
1402 if (!git_config_get_value("core.alternateRefsPrefixes", &value)) {
1403 argv_array_push(&cmd->args, "--");
1404 argv_array_split(&cmd->args, value);
1405 }
1406 }
1407
1408 cmd->env = local_repo_env;
1409 cmd->out = -1;
1410 }
1411
1412 static void read_alternate_refs(const char *path,
1413 alternate_ref_fn *cb,
1414 void *data)
1415 {
1416 struct child_process cmd = CHILD_PROCESS_INIT;
1417 struct strbuf line = STRBUF_INIT;
1418 FILE *fh;
1419
1420 fill_alternate_refs_command(&cmd, path);
1421
1422 if (start_command(&cmd))
1423 return;
1424
1425 fh = xfdopen(cmd.out, "r");
1426 while (strbuf_getline_lf(&line, fh) != EOF) {
1427 struct object_id oid;
1428 const char *p;
1429
1430 if (parse_oid_hex(line.buf, &oid, &p) || *p) {
1431 warning(_("invalid line while parsing alternate refs: %s"),
1432 line.buf);
1433 break;
1434 }
1435
1436 cb(&oid, data);
1437 }
1438
1439 fclose(fh);
1440 finish_command(&cmd);
1441 }
1442
1443 struct alternate_refs_data {
1444 alternate_ref_fn *fn;
1445 void *data;
1446 };
1447
1448 static int refs_from_alternate_cb(struct object_directory *e,
1449 void *data)
1450 {
1451 struct strbuf path = STRBUF_INIT;
1452 size_t base_len;
1453 struct alternate_refs_data *cb = data;
1454
1455 if (!strbuf_realpath(&path, e->path, 0))
1456 goto out;
1457 if (!strbuf_strip_suffix(&path, "/objects"))
1458 goto out;
1459 base_len = path.len;
1460
1461 /* Is this a git repository with refs? */
1462 strbuf_addstr(&path, "/refs");
1463 if (!is_directory(path.buf))
1464 goto out;
1465 strbuf_setlen(&path, base_len);
1466
1467 read_alternate_refs(path.buf, cb->fn, cb->data);
1468
1469 out:
1470 strbuf_release(&path);
1471 return 0;
1472 }
1473
1474 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1475 {
1476 struct alternate_refs_data cb;
1477 cb.fn = fn;
1478 cb.data = data;
1479 foreach_alt_odb(refs_from_alternate_cb, &cb);
1480 }
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