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t/README: clarify the test_have_prereq documentation
[alt-git.git] / transport.c
blobb6c5652d6cb5eb9b0c1d3ed80ad5034ce7f9b5dc
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #include "pkt-line.h"
5 #include "fetch-pack.h"
6 #include "remote.h"
7 #include "connect.h"
8 #include "send-pack.h"
9 #include "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13 #include "branch.h"
14 #include "url.h"
15 #include "submodule.h"
16 #include "string-list.h"
17 #include "sha1-array.h"
18 #include "sigchain.h"
19
20 static void set_upstreams(struct transport *transport, struct ref *refs,
21 int pretend)
22 {
23 struct ref *ref;
24 for (ref = refs; ref; ref = ref->next) {
25 const char *localname;
26 const char *tmp;
27 const char *remotename;
28 unsigned char sha[20];
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 sha, &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 hashcpy(ref->old_oid.hash, e->sha1);
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 sha1_array extra_have;
120 struct sha1_array shallow;
121 };
122
123 static int set_git_option(struct git_transport_options *opts,
124 const char *name, const char *value)
125 {
126 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
127 opts->uploadpack = value;
128 return 0;
129 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
130 opts->receivepack = value;
131 return 0;
132 } else if (!strcmp(name, TRANS_OPT_THIN)) {
133 opts->thin = !!value;
134 return 0;
135 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
136 opts->followtags = !!value;
137 return 0;
138 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
139 opts->keep = !!value;
140 return 0;
141 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
142 opts->update_shallow = !!value;
143 return 0;
144 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
145 if (!value)
146 opts->depth = 0;
147 else {
148 char *end;
149 opts->depth = strtol(value, &end, 0);
150 if (*end)
151 die(_("transport: invalid depth option '%s'"), value);
152 }
153 return 0;
154 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
155 opts->deepen_since = value;
156 return 0;
157 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
158 opts->deepen_not = (const struct string_list *)value;
159 return 0;
160 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
161 opts->deepen_relative = !!value;
162 return 0;
163 }
164 return 1;
165 }
166
167 static int connect_setup(struct transport *transport, int for_push)
168 {
169 struct git_transport_data *data = transport->data;
170 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
171
172 if (data->conn)
173 return 0;
174
175 switch (transport->family) {
176 case TRANSPORT_FAMILY_ALL: break;
177 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
178 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
179 }
180
181 data->conn = git_connect(data->fd, transport->url,
182 for_push ? data->options.receivepack :
183 data->options.uploadpack,
184 flags);
185
186 return 0;
187 }
188
189 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
190 {
191 struct git_transport_data *data = transport->data;
192 struct ref *refs;
193
194 connect_setup(transport, for_push);
195 get_remote_heads(data->fd[0], NULL, 0, &refs,
196 for_push ? REF_NORMAL : 0,
197 &data->extra_have,
198 &data->shallow);
199 data->got_remote_heads = 1;
200
201 return refs;
202 }
203
204 static int fetch_refs_via_pack(struct transport *transport,
205 int nr_heads, struct ref **to_fetch)
206 {
207 struct git_transport_data *data = transport->data;
208 struct ref *refs;
209 char *dest = xstrdup(transport->url);
210 struct fetch_pack_args args;
211 struct ref *refs_tmp = NULL;
212
213 memset(&args, 0, sizeof(args));
214 args.uploadpack = data->options.uploadpack;
215 args.keep_pack = data->options.keep;
216 args.lock_pack = 1;
217 args.use_thin_pack = data->options.thin;
218 args.include_tag = data->options.followtags;
219 args.verbose = (transport->verbose > 1);
220 args.quiet = (transport->verbose < 0);
221 args.no_progress = !transport->progress;
222 args.depth = data->options.depth;
223 args.deepen_since = data->options.deepen_since;
224 args.deepen_not = data->options.deepen_not;
225 args.deepen_relative = data->options.deepen_relative;
226 args.check_self_contained_and_connected =
227 data->options.check_self_contained_and_connected;
228 args.cloning = transport->cloning;
229 args.update_shallow = data->options.update_shallow;
230
231 if (!data->got_remote_heads) {
232 connect_setup(transport, 0);
233 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
234 NULL, &data->shallow);
235 data->got_remote_heads = 1;
236 }
237
238 refs = fetch_pack(&args, data->fd, data->conn,
239 refs_tmp ? refs_tmp : transport->remote_refs,
240 dest, to_fetch, nr_heads, &data->shallow,
241 &transport->pack_lockfile);
242 close(data->fd[0]);
243 close(data->fd[1]);
244 if (finish_connect(data->conn)) {
245 free_refs(refs);
246 refs = NULL;
247 }
248 data->conn = NULL;
249 data->got_remote_heads = 0;
250 data->options.self_contained_and_connected =
251 args.self_contained_and_connected;
252
253 free_refs(refs_tmp);
254 free_refs(refs);
255 free(dest);
256 return (refs ? 0 : -1);
257 }
258
259 static int push_had_errors(struct ref *ref)
260 {
261 for (; ref; ref = ref->next) {
262 switch (ref->status) {
263 case REF_STATUS_NONE:
264 case REF_STATUS_UPTODATE:
265 case REF_STATUS_OK:
266 break;
267 default:
268 return 1;
269 }
270 }
271 return 0;
272 }
273
274 int transport_refs_pushed(struct ref *ref)
275 {
276 for (; ref; ref = ref->next) {
277 switch(ref->status) {
278 case REF_STATUS_NONE:
279 case REF_STATUS_UPTODATE:
280 break;
281 default:
282 return 1;
283 }
284 }
285 return 0;
286 }
287
288 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
289 {
290 struct refspec rs;
291
292 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
293 return;
294
295 rs.src = ref->name;
296 rs.dst = NULL;
297
298 if (!remote_find_tracking(remote, &rs)) {
299 if (verbose)
300 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
301 if (ref->deletion) {
302 delete_ref(rs.dst, NULL, 0);
303 } else
304 update_ref("update by push", rs.dst,
305 ref->new_oid.hash, NULL, 0, 0);
306 free(rs.dst);
307 }
308 }
309
310 static void print_ref_status(char flag, const char *summary,
311 struct ref *to, struct ref *from, const char *msg,
312 int porcelain, int summary_width)
313 {
314 if (porcelain) {
315 if (from)
316 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
317 else
318 fprintf(stdout, "%c\t:%s\t", flag, to->name);
319 if (msg)
320 fprintf(stdout, "%s (%s)\n", summary, msg);
321 else
322 fprintf(stdout, "%s\n", summary);
323 } else {
324 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
325 if (from)
326 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
327 else
328 fputs(prettify_refname(to->name), stderr);
329 if (msg) {
330 fputs(" (", stderr);
331 fputs(msg, stderr);
332 fputc(')', stderr);
333 }
334 fputc('\n', stderr);
335 }
336 }
337
338 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
339 {
340 if (ref->deletion)
341 print_ref_status('-', "[deleted]", ref, NULL, NULL,
342 porcelain, summary_width);
343 else if (is_null_oid(&ref->old_oid))
344 print_ref_status('*',
345 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
346 "[new branch]"),
347 ref, ref->peer_ref, NULL, porcelain, summary_width);
348 else {
349 struct strbuf quickref = STRBUF_INIT;
350 char type;
351 const char *msg;
352
353 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
354 DEFAULT_ABBREV);
355 if (ref->forced_update) {
356 strbuf_addstr(&quickref, "...");
357 type = '+';
358 msg = "forced update";
359 } else {
360 strbuf_addstr(&quickref, "..");
361 type = ' ';
362 msg = NULL;
363 }
364 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
365 DEFAULT_ABBREV);
366
367 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
368 porcelain, summary_width);
369 strbuf_release(&quickref);
370 }
371 }
372
373 static int print_one_push_status(struct ref *ref, const char *dest, int count,
374 int porcelain, int summary_width)
375 {
376 if (!count) {
377 char *url = transport_anonymize_url(dest);
378 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
379 free(url);
380 }
381
382 switch(ref->status) {
383 case REF_STATUS_NONE:
384 print_ref_status('X', "[no match]", ref, NULL, NULL,
385 porcelain, summary_width);
386 break;
387 case REF_STATUS_REJECT_NODELETE:
388 print_ref_status('!', "[rejected]", ref, NULL,
389 "remote does not support deleting refs",
390 porcelain, summary_width);
391 break;
392 case REF_STATUS_UPTODATE:
393 print_ref_status('=', "[up to date]", ref,
394 ref->peer_ref, NULL, porcelain, summary_width);
395 break;
396 case REF_STATUS_REJECT_NONFASTFORWARD:
397 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
398 "non-fast-forward", porcelain, summary_width);
399 break;
400 case REF_STATUS_REJECT_ALREADY_EXISTS:
401 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
402 "already exists", porcelain, summary_width);
403 break;
404 case REF_STATUS_REJECT_FETCH_FIRST:
405 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
406 "fetch first", porcelain, summary_width);
407 break;
408 case REF_STATUS_REJECT_NEEDS_FORCE:
409 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
410 "needs force", porcelain, summary_width);
411 break;
412 case REF_STATUS_REJECT_STALE:
413 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
414 "stale info", porcelain, summary_width);
415 break;
416 case REF_STATUS_REJECT_SHALLOW:
417 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
418 "new shallow roots not allowed",
419 porcelain, summary_width);
420 break;
421 case REF_STATUS_REMOTE_REJECT:
422 print_ref_status('!', "[remote rejected]", ref,
423 ref->deletion ? NULL : ref->peer_ref,
424 ref->remote_status, porcelain, summary_width);
425 break;
426 case REF_STATUS_EXPECTING_REPORT:
427 print_ref_status('!', "[remote failure]", ref,
428 ref->deletion ? NULL : ref->peer_ref,
429 "remote failed to report status",
430 porcelain, summary_width);
431 break;
432 case REF_STATUS_ATOMIC_PUSH_FAILED:
433 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
434 "atomic push failed", porcelain, summary_width);
435 break;
436 case REF_STATUS_OK:
437 print_ok_ref_status(ref, porcelain, summary_width);
438 break;
439 }
440
441 return 1;
442 }
443
444 static int measure_abbrev(const struct object_id *oid, int sofar)
445 {
446 char hex[GIT_SHA1_HEXSZ + 1];
447 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
448
449 return (w < sofar) ? sofar : w;
450 }
451
452 int transport_summary_width(const struct ref *refs)
453 {
454 int maxw = -1;
455
456 for (; refs; refs = refs->next) {
457 maxw = measure_abbrev(&refs->old_oid, maxw);
458 maxw = measure_abbrev(&refs->new_oid, maxw);
459 }
460 if (maxw < 0)
461 maxw = FALLBACK_DEFAULT_ABBREV;
462 return (2 * maxw + 3);
463 }
464
465 void transport_print_push_status(const char *dest, struct ref *refs,
466 int verbose, int porcelain, unsigned int *reject_reasons)
467 {
468 struct ref *ref;
469 int n = 0;
470 unsigned char head_sha1[20];
471 char *head;
472 int summary_width = transport_summary_width(refs);
473
474 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
475
476 if (verbose) {
477 for (ref = refs; ref; ref = ref->next)
478 if (ref->status == REF_STATUS_UPTODATE)
479 n += print_one_push_status(ref, dest, n,
480 porcelain, summary_width);
481 }
482
483 for (ref = refs; ref; ref = ref->next)
484 if (ref->status == REF_STATUS_OK)
485 n += print_one_push_status(ref, dest, n,
486 porcelain, summary_width);
487
488 *reject_reasons = 0;
489 for (ref = refs; ref; ref = ref->next) {
490 if (ref->status != REF_STATUS_NONE &&
491 ref->status != REF_STATUS_UPTODATE &&
492 ref->status != REF_STATUS_OK)
493 n += print_one_push_status(ref, dest, n,
494 porcelain, summary_width);
495 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
496 if (head != NULL && !strcmp(head, ref->name))
497 *reject_reasons |= REJECT_NON_FF_HEAD;
498 else
499 *reject_reasons |= REJECT_NON_FF_OTHER;
500 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
501 *reject_reasons |= REJECT_ALREADY_EXISTS;
502 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
503 *reject_reasons |= REJECT_FETCH_FIRST;
504 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
505 *reject_reasons |= REJECT_NEEDS_FORCE;
506 }
507 }
508 free(head);
509 }
510
511 void transport_verify_remote_names(int nr_heads, const char **heads)
512 {
513 int i;
514
515 for (i = 0; i < nr_heads; i++) {
516 const char *local = heads[i];
517 const char *remote = strrchr(heads[i], ':');
518
519 if (*local == '+')
520 local++;
521
522 /* A matching refspec is okay. */
523 if (remote == local && remote[1] == '\0')
524 continue;
525
526 remote = remote ? (remote + 1) : local;
527 if (check_refname_format(remote,
528 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
529 die("remote part of refspec is not a valid name in %s",
530 heads[i]);
531 }
532 }
533
534 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
535 {
536 struct git_transport_data *data = transport->data;
537 struct send_pack_args args;
538 int ret;
539
540 if (!data->got_remote_heads) {
541 struct ref *tmp_refs;
542 connect_setup(transport, 1);
543
544 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
545 NULL, &data->shallow);
546 data->got_remote_heads = 1;
547 }
548
549 memset(&args, 0, sizeof(args));
550 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
551 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
552 args.use_thin_pack = data->options.thin;
553 args.verbose = (transport->verbose > 0);
554 args.quiet = (transport->verbose < 0);
555 args.progress = transport->progress;
556 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
557 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
558 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
559 args.push_options = transport->push_options;
560 args.url = transport->url;
561
562 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
563 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
564 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
565 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
566 else
567 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
568
569 ret = send_pack(&args, data->fd, data->conn, remote_refs,
570 &data->extra_have);
571
572 close(data->fd[1]);
573 close(data->fd[0]);
574 ret |= finish_connect(data->conn);
575 data->conn = NULL;
576 data->got_remote_heads = 0;
577
578 return ret;
579 }
580
581 static int connect_git(struct transport *transport, const char *name,
582 const char *executable, int fd[2])
583 {
584 struct git_transport_data *data = transport->data;
585 data->conn = git_connect(data->fd, transport->url,
586 executable, 0);
587 fd[0] = data->fd[0];
588 fd[1] = data->fd[1];
589 return 0;
590 }
591
592 static int disconnect_git(struct transport *transport)
593 {
594 struct git_transport_data *data = transport->data;
595 if (data->conn) {
596 if (data->got_remote_heads)
597 packet_flush(data->fd[1]);
598 close(data->fd[0]);
599 close(data->fd[1]);
600 finish_connect(data->conn);
601 }
602
603 free(data);
604 return 0;
605 }
606
607 void transport_take_over(struct transport *transport,
608 struct child_process *child)
609 {
610 struct git_transport_data *data;
611
612 if (!transport->smart_options)
613 die("BUG: taking over transport requires non-NULL "
614 "smart_options field.");
615
616 data = xcalloc(1, sizeof(*data));
617 data->options = *transport->smart_options;
618 data->conn = child;
619 data->fd[0] = data->conn->out;
620 data->fd[1] = data->conn->in;
621 data->got_remote_heads = 0;
622 transport->data = data;
623
624 transport->set_option = NULL;
625 transport->get_refs_list = get_refs_via_connect;
626 transport->fetch = fetch_refs_via_pack;
627 transport->push = NULL;
628 transport->push_refs = git_transport_push;
629 transport->disconnect = disconnect_git;
630 transport->smart_options = &(data->options);
631
632 transport->cannot_reuse = 1;
633 }
634
635 static int is_file(const char *url)
636 {
637 struct stat buf;
638 if (stat(url, &buf))
639 return 0;
640 return S_ISREG(buf.st_mode);
641 }
642
643 static int external_specification_len(const char *url)
644 {
645 return strchr(url, ':') - url;
646 }
647
648 static const struct string_list *protocol_whitelist(void)
649 {
650 static int enabled = -1;
651 static struct string_list allowed = STRING_LIST_INIT_DUP;
652
653 if (enabled < 0) {
654 const char *v = getenv("GIT_ALLOW_PROTOCOL");
655 if (v) {
656 string_list_split(&allowed, v, ':', -1);
657 string_list_sort(&allowed);
658 enabled = 1;
659 } else {
660 enabled = 0;
661 }
662 }
663
664 return enabled ? &allowed : NULL;
665 }
666
667 enum protocol_allow_config {
668 PROTOCOL_ALLOW_NEVER = 0,
669 PROTOCOL_ALLOW_USER_ONLY,
670 PROTOCOL_ALLOW_ALWAYS
671 };
672
673 static enum protocol_allow_config parse_protocol_config(const char *key,
674 const char *value)
675 {
676 if (!strcasecmp(value, "always"))
677 return PROTOCOL_ALLOW_ALWAYS;
678 else if (!strcasecmp(value, "never"))
679 return PROTOCOL_ALLOW_NEVER;
680 else if (!strcasecmp(value, "user"))
681 return PROTOCOL_ALLOW_USER_ONLY;
682
683 die("unknown value for config '%s': %s", key, value);
684 }
685
686 static enum protocol_allow_config get_protocol_config(const char *type)
687 {
688 char *key = xstrfmt("protocol.%s.allow", type);
689 char *value;
690
691 /* first check the per-protocol config */
692 if (!git_config_get_string(key, &value)) {
693 enum protocol_allow_config ret =
694 parse_protocol_config(key, value);
695 free(key);
696 free(value);
697 return ret;
698 }
699 free(key);
700
701 /* if defined, fallback to user-defined default for unknown protocols */
702 if (!git_config_get_string("protocol.allow", &value)) {
703 enum protocol_allow_config ret =
704 parse_protocol_config("protocol.allow", value);
705 free(value);
706 return ret;
707 }
708
709 /* fallback to built-in defaults */
710 /* known safe */
711 if (!strcmp(type, "http") ||
712 !strcmp(type, "https") ||
713 !strcmp(type, "git") ||
714 !strcmp(type, "ssh") ||
715 !strcmp(type, "file"))
716 return PROTOCOL_ALLOW_ALWAYS;
717
718 /* known scary; err on the side of caution */
719 if (!strcmp(type, "ext"))
720 return PROTOCOL_ALLOW_NEVER;
721
722 /* unknown; by default let them be used only directly by the user */
723 return PROTOCOL_ALLOW_USER_ONLY;
724 }
725
726 int is_transport_allowed(const char *type, int from_user)
727 {
728 const struct string_list *whitelist = protocol_whitelist();
729 if (whitelist)
730 return string_list_has_string(whitelist, type);
731
732 switch (get_protocol_config(type)) {
733 case PROTOCOL_ALLOW_ALWAYS:
734 return 1;
735 case PROTOCOL_ALLOW_NEVER:
736 return 0;
737 case PROTOCOL_ALLOW_USER_ONLY:
738 if (from_user < 0)
739 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
740 return from_user;
741 }
742
743 die("BUG: invalid protocol_allow_config type");
744 }
745
746 void transport_check_allowed(const char *type)
747 {
748 if (!is_transport_allowed(type, -1))
749 die("transport '%s' not allowed", type);
750 }
751
752 struct transport *transport_get(struct remote *remote, const char *url)
753 {
754 const char *helper;
755 struct transport *ret = xcalloc(1, sizeof(*ret));
756
757 ret->progress = isatty(2);
758
759 if (!remote)
760 die("No remote provided to transport_get()");
761
762 ret->got_remote_refs = 0;
763 ret->remote = remote;
764 helper = remote->foreign_vcs;
765
766 if (!url && remote->url)
767 url = remote->url[0];
768 ret->url = url;
769
770 /* maybe it is a foreign URL? */
771 if (url) {
772 const char *p = url;
773
774 while (is_urlschemechar(p == url, *p))
775 p++;
776 if (starts_with(p, "::"))
777 helper = xstrndup(url, p - url);
778 }
779
780 if (helper) {
781 transport_helper_init(ret, helper);
782 } else if (starts_with(url, "rsync:")) {
783 die("git-over-rsync is no longer supported");
784 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
785 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
786 transport_check_allowed("file");
787 ret->data = data;
788 ret->get_refs_list = get_refs_from_bundle;
789 ret->fetch = fetch_refs_from_bundle;
790 ret->disconnect = close_bundle;
791 ret->smart_options = NULL;
792 } else if (!is_url(url)
793 || starts_with(url, "file://")
794 || starts_with(url, "git://")
795 || starts_with(url, "ssh://")
796 || starts_with(url, "git+ssh://") /* deprecated - do not use */
797 || starts_with(url, "ssh+git://") /* deprecated - do not use */
798 ) {
799 /*
800 * These are builtin smart transports; "allowed" transports
801 * will be checked individually in git_connect.
802 */
803 struct git_transport_data *data = xcalloc(1, sizeof(*data));
804 ret->data = data;
805 ret->set_option = NULL;
806 ret->get_refs_list = get_refs_via_connect;
807 ret->fetch = fetch_refs_via_pack;
808 ret->push_refs = git_transport_push;
809 ret->connect = connect_git;
810 ret->disconnect = disconnect_git;
811 ret->smart_options = &(data->options);
812
813 data->conn = NULL;
814 data->got_remote_heads = 0;
815 } else {
816 /* Unknown protocol in URL. Pass to external handler. */
817 int len = external_specification_len(url);
818 char *handler = xmemdupz(url, len);
819 transport_helper_init(ret, handler);
820 }
821
822 if (ret->smart_options) {
823 ret->smart_options->thin = 1;
824 ret->smart_options->uploadpack = "git-upload-pack";
825 if (remote->uploadpack)
826 ret->smart_options->uploadpack = remote->uploadpack;
827 ret->smart_options->receivepack = "git-receive-pack";
828 if (remote->receivepack)
829 ret->smart_options->receivepack = remote->receivepack;
830 }
831
832 return ret;
833 }
834
835 int transport_set_option(struct transport *transport,
836 const char *name, const char *value)
837 {
838 int git_reports = 1, protocol_reports = 1;
839
840 if (transport->smart_options)
841 git_reports = set_git_option(transport->smart_options,
842 name, value);
843
844 if (transport->set_option)
845 protocol_reports = transport->set_option(transport, name,
846 value);
847
848 /* If either report is 0, report 0 (success). */
849 if (!git_reports || !protocol_reports)
850 return 0;
851 /* If either reports -1 (invalid value), report -1. */
852 if ((git_reports == -1) || (protocol_reports == -1))
853 return -1;
854 /* Otherwise if both report unknown, report unknown. */
855 return 1;
856 }
857
858 void transport_set_verbosity(struct transport *transport, int verbosity,
859 int force_progress)
860 {
861 if (verbosity >= 1)
862 transport->verbose = verbosity <= 3 ? verbosity : 3;
863 if (verbosity < 0)
864 transport->verbose = -1;
865
866 /**
867 * Rules used to determine whether to report progress (processing aborts
868 * when a rule is satisfied):
869 *
870 * . Report progress, if force_progress is 1 (ie. --progress).
871 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
872 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
873 * . Report progress if isatty(2) is 1.
874 **/
875 if (force_progress >= 0)
876 transport->progress = !!force_progress;
877 else
878 transport->progress = verbosity >= 0 && isatty(2);
879 }
880
881 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
882 {
883 int i;
884
885 fprintf(stderr, _("The following submodule paths contain changes that can\n"
886 "not be found on any remote:\n"));
887 for (i = 0; i < needs_pushing->nr; i++)
888 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
889 fprintf(stderr, _("\nPlease try\n\n"
890 " git push --recurse-submodules=on-demand\n\n"
891 "or cd to the path and use\n\n"
892 " git push\n\n"
893 "to push them to a remote.\n\n"));
894
895 string_list_clear(needs_pushing, 0);
896
897 die(_("Aborting."));
898 }
899
900 static int run_pre_push_hook(struct transport *transport,
901 struct ref *remote_refs)
902 {
903 int ret = 0, x;
904 struct ref *r;
905 struct child_process proc = CHILD_PROCESS_INIT;
906 struct strbuf buf;
907 const char *argv[4];
908
909 if (!(argv[0] = find_hook("pre-push")))
910 return 0;
911
912 argv[1] = transport->remote->name;
913 argv[2] = transport->url;
914 argv[3] = NULL;
915
916 proc.argv = argv;
917 proc.in = -1;
918
919 if (start_command(&proc)) {
920 finish_command(&proc);
921 return -1;
922 }
923
924 sigchain_push(SIGPIPE, SIG_IGN);
925
926 strbuf_init(&buf, 256);
927
928 for (r = remote_refs; r; r = r->next) {
929 if (!r->peer_ref) continue;
930 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
931 if (r->status == REF_STATUS_REJECT_STALE) continue;
932 if (r->status == REF_STATUS_UPTODATE) continue;
933
934 strbuf_reset(&buf);
935 strbuf_addf( &buf, "%s %s %s %s\n",
936 r->peer_ref->name, oid_to_hex(&r->new_oid),
937 r->name, oid_to_hex(&r->old_oid));
938
939 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
940 /* We do not mind if a hook does not read all refs. */
941 if (errno != EPIPE)
942 ret = -1;
943 break;
944 }
945 }
946
947 strbuf_release(&buf);
948
949 x = close(proc.in);
950 if (!ret)
951 ret = x;
952
953 sigchain_pop(SIGPIPE);
954
955 x = finish_command(&proc);
956 if (!ret)
957 ret = x;
958
959 return ret;
960 }
961
962 int transport_push(struct transport *transport,
963 int refspec_nr, const char **refspec, int flags,
964 unsigned int *reject_reasons)
965 {
966 *reject_reasons = 0;
967 transport_verify_remote_names(refspec_nr, refspec);
968
969 if (transport->push) {
970 /* Maybe FIXME. But no important transport uses this case. */
971 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
972 die("This transport does not support using --set-upstream");
973
974 return transport->push(transport, refspec_nr, refspec, flags);
975 } else if (transport->push_refs) {
976 struct ref *remote_refs;
977 struct ref *local_refs = get_local_heads();
978 int match_flags = MATCH_REFS_NONE;
979 int verbose = (transport->verbose > 0);
980 int quiet = (transport->verbose < 0);
981 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
982 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
983 int push_ret, ret, err;
984
985 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
986 return -1;
987
988 remote_refs = transport->get_refs_list(transport, 1);
989
990 if (flags & TRANSPORT_PUSH_ALL)
991 match_flags |= MATCH_REFS_ALL;
992 if (flags & TRANSPORT_PUSH_MIRROR)
993 match_flags |= MATCH_REFS_MIRROR;
994 if (flags & TRANSPORT_PUSH_PRUNE)
995 match_flags |= MATCH_REFS_PRUNE;
996 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
997 match_flags |= MATCH_REFS_FOLLOW_TAGS;
998
999 if (match_push_refs(local_refs, &remote_refs,
1000 refspec_nr, refspec, match_flags)) {
1001 return -1;
1002 }
1003
1004 if (transport->smart_options &&
1005 transport->smart_options->cas &&
1006 !is_empty_cas(transport->smart_options->cas))
1007 apply_push_cas(transport->smart_options->cas,
1008 transport->remote, remote_refs);
1009
1010 set_ref_status_for_push(remote_refs,
1011 flags & TRANSPORT_PUSH_MIRROR,
1012 flags & TRANSPORT_PUSH_FORCE);
1013
1014 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1015 if (run_pre_push_hook(transport, remote_refs))
1016 return -1;
1017
1018 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1019 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1020 !is_bare_repository()) {
1021 struct ref *ref = remote_refs;
1022 struct sha1_array commits = SHA1_ARRAY_INIT;
1023
1024 for (; ref; ref = ref->next)
1025 if (!is_null_oid(&ref->new_oid))
1026 sha1_array_append(&commits, ref->new_oid.hash);
1027
1028 if (!push_unpushed_submodules(&commits,
1029 transport->remote->name,
1030 pretend)) {
1031 sha1_array_clear(&commits);
1032 die("Failed to push all needed submodules!");
1033 }
1034 sha1_array_clear(&commits);
1035 }
1036
1037 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1038 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1039 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1040 !pretend)) && !is_bare_repository()) {
1041 struct ref *ref = remote_refs;
1042 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1043 struct sha1_array commits = SHA1_ARRAY_INIT;
1044
1045 for (; ref; ref = ref->next)
1046 if (!is_null_oid(&ref->new_oid))
1047 sha1_array_append(&commits, ref->new_oid.hash);
1048
1049 if (find_unpushed_submodules(&commits, transport->remote->name,
1050 &needs_pushing)) {
1051 sha1_array_clear(&commits);
1052 die_with_unpushed_submodules(&needs_pushing);
1053 }
1054 string_list_clear(&needs_pushing, 0);
1055 sha1_array_clear(&commits);
1056 }
1057
1058 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1059 push_ret = transport->push_refs(transport, remote_refs, flags);
1060 else
1061 push_ret = 0;
1062 err = push_had_errors(remote_refs);
1063 ret = push_ret | err;
1064
1065 if (!quiet || err)
1066 transport_print_push_status(transport->url, remote_refs,
1067 verbose | porcelain, porcelain,
1068 reject_reasons);
1069
1070 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1071 set_upstreams(transport, remote_refs, pretend);
1072
1073 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1074 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1075 struct ref *ref;
1076 for (ref = remote_refs; ref; ref = ref->next)
1077 transport_update_tracking_ref(transport->remote, ref, verbose);
1078 }
1079
1080 if (porcelain && !push_ret)
1081 puts("Done");
1082 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1083 fprintf(stderr, "Everything up-to-date\n");
1084
1085 return ret;
1086 }
1087 return 1;
1088 }
1089
1090 const struct ref *transport_get_remote_refs(struct transport *transport)
1091 {
1092 if (!transport->got_remote_refs) {
1093 transport->remote_refs = transport->get_refs_list(transport, 0);
1094 transport->got_remote_refs = 1;
1095 }
1096
1097 return transport->remote_refs;
1098 }
1099
1100 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1101 {
1102 int rc;
1103 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1104 struct ref **heads = NULL;
1105 struct ref *rm;
1106
1107 for (rm = refs; rm; rm = rm->next) {
1108 nr_refs++;
1109 if (rm->peer_ref &&
1110 !is_null_oid(&rm->old_oid) &&
1111 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1112 continue;
1113 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1114 heads[nr_heads++] = rm;
1115 }
1116
1117 if (!nr_heads) {
1118 /*
1119 * When deepening of a shallow repository is requested,
1120 * then local and remote refs are likely to still be equal.
1121 * Just feed them all to the fetch method in that case.
1122 * This condition shouldn't be met in a non-deepening fetch
1123 * (see builtin/fetch.c:quickfetch()).
1124 */
1125 ALLOC_ARRAY(heads, nr_refs);
1126 for (rm = refs; rm; rm = rm->next)
1127 heads[nr_heads++] = rm;
1128 }
1129
1130 rc = transport->fetch(transport, nr_heads, heads);
1131
1132 free(heads);
1133 return rc;
1134 }
1135
1136 void transport_unlock_pack(struct transport *transport)
1137 {
1138 if (transport->pack_lockfile) {
1139 unlink_or_warn(transport->pack_lockfile);
1140 free(transport->pack_lockfile);
1141 transport->pack_lockfile = NULL;
1142 }
1143 }
1144
1145 int transport_connect(struct transport *transport, const char *name,
1146 const char *exec, int fd[2])
1147 {
1148 if (transport->connect)
1149 return transport->connect(transport, name, exec, fd);
1150 else
1151 die("Operation not supported by protocol");
1152 }
1153
1154 int transport_disconnect(struct transport *transport)
1155 {
1156 int ret = 0;
1157 if (transport->disconnect)
1158 ret = transport->disconnect(transport);
1159 free(transport);
1160 return ret;
1161 }
1162
1163 /*
1164 * Strip username (and password) from a URL and return
1165 * it in a newly allocated string.
1166 */
1167 char *transport_anonymize_url(const char *url)
1168 {
1169 char *scheme_prefix, *anon_part;
1170 size_t anon_len, prefix_len = 0;
1171
1172 anon_part = strchr(url, '@');
1173 if (url_is_local_not_ssh(url) || !anon_part)
1174 goto literal_copy;
1175
1176 anon_len = strlen(++anon_part);
1177 scheme_prefix = strstr(url, "://");
1178 if (!scheme_prefix) {
1179 if (!strchr(anon_part, ':'))
1180 /* cannot be "me@there:/path/name" */
1181 goto literal_copy;
1182 } else {
1183 const char *cp;
1184 /* make sure scheme is reasonable */
1185 for (cp = url; cp < scheme_prefix; cp++) {
1186 switch (*cp) {
1187 /* RFC 1738 2.1 */
1188 case '+': case '.': case '-':
1189 break; /* ok */
1190 default:
1191 if (isalnum(*cp))
1192 break;
1193 /* it isn't */
1194 goto literal_copy;
1195 }
1196 }
1197 /* @ past the first slash does not count */
1198 cp = strchr(scheme_prefix + 3, '/');
1199 if (cp && cp < anon_part)
1200 goto literal_copy;
1201 prefix_len = scheme_prefix - url + 3;
1202 }
1203 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1204 (int)anon_len, anon_part);
1205 literal_copy:
1206 return xstrdup(url);
1207 }
1208
1209 struct alternate_refs_data {
1210 alternate_ref_fn *fn;
1211 void *data;
1212 };
1213
1214 static int refs_from_alternate_cb(struct alternate_object_database *e,
1215 void *data)
1216 {
1217 char *other;
1218 size_t len;
1219 struct remote *remote;
1220 struct transport *transport;
1221 const struct ref *extra;
1222 struct alternate_refs_data *cb = data;
1223
1224 other = real_pathdup(e->path, 1);
1225 len = strlen(other);
1226
1227 while (other[len-1] == '/')
1228 other[--len] = '\0';
1229 if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1230 goto out;
1231 /* Is this a git repository with refs? */
1232 memcpy(other + len - 8, "/refs", 6);
1233 if (!is_directory(other))
1234 goto out;
1235 other[len - 8] = '\0';
1236 remote = remote_get(other);
1237 transport = transport_get(remote, other);
1238 for (extra = transport_get_remote_refs(transport);
1239 extra;
1240 extra = extra->next)
1241 cb->fn(extra, cb->data);
1242 transport_disconnect(transport);
1243 out:
1244 free(other);
1245 return 0;
1246 }
1247
1248 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1249 {
1250 struct alternate_refs_data cb;
1251 cb.fn = fn;
1252 cb.data = data;
1253 foreach_alt_odb(refs_from_alternate_cb, &cb);
1254 }
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