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Git 2.16.4
[alt-git.git] / transport.c
blobfc802260f61c7496f4250b15ef6f5ab8dd316898
1 #include "cache.h"
2 #include "config.h"
3 #include "transport.h"
4 #include "run-command.h"
5 #include "pkt-line.h"
6 #include "fetch-pack.h"
7 #include "remote.h"
8 #include "connect.h"
9 #include "send-pack.h"
10 #include "walker.h"
11 #include "bundle.h"
12 #include "dir.h"
13 #include "refs.h"
14 #include "branch.h"
15 #include "url.h"
16 #include "submodule.h"
17 #include "string-list.h"
18 #include "sha1-array.h"
19 #include "sigchain.h"
20 #include "transport-internal.h"
21
22 static void set_upstreams(struct transport *transport, struct ref *refs,
23 int pretend)
24 {
25 struct ref *ref;
26 for (ref = refs; ref; ref = ref->next) {
27 const char *localname;
28 const char *tmp;
29 const char *remotename;
30 int flag = 0;
31 /*
32 * Check suitability for tracking. Must be successful /
33 * already up-to-date ref create/modify (not delete).
34 */
35 if (ref->status != REF_STATUS_OK &&
36 ref->status != REF_STATUS_UPTODATE)
37 continue;
38 if (!ref->peer_ref)
39 continue;
40 if (is_null_oid(&ref->new_oid))
41 continue;
42
43 /* Follow symbolic refs (mainly for HEAD). */
44 localname = ref->peer_ref->name;
45 remotename = ref->name;
46 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
47 NULL, &flag);
48 if (tmp && flag & REF_ISSYMREF &&
49 starts_with(tmp, "refs/heads/"))
50 localname = tmp;
51
52 /* Both source and destination must be local branches. */
53 if (!localname || !starts_with(localname, "refs/heads/"))
54 continue;
55 if (!remotename || !starts_with(remotename, "refs/heads/"))
56 continue;
57
58 if (!pretend)
59 install_branch_config(BRANCH_CONFIG_VERBOSE,
60 localname + 11, transport->remote->name,
61 remotename);
62 else
63 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
64 localname + 11, remotename + 11,
65 transport->remote->name);
66 }
67 }
68
69 struct bundle_transport_data {
70 int fd;
71 struct bundle_header header;
72 };
73
74 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
75 {
76 struct bundle_transport_data *data = transport->data;
77 struct ref *result = NULL;
78 int i;
79
80 if (for_push)
81 return NULL;
82
83 if (data->fd > 0)
84 close(data->fd);
85 data->fd = read_bundle_header(transport->url, &data->header);
86 if (data->fd < 0)
87 die ("Could not read bundle '%s'.", transport->url);
88 for (i = 0; i < data->header.references.nr; i++) {
89 struct ref_list_entry *e = data->header.references.list + i;
90 struct ref *ref = alloc_ref(e->name);
91 oidcpy(&ref->old_oid, &e->oid);
92 ref->next = result;
93 result = ref;
94 }
95 return result;
96 }
97
98 static int fetch_refs_from_bundle(struct transport *transport,
99 int nr_heads, struct ref **to_fetch)
100 {
101 struct bundle_transport_data *data = transport->data;
102 return unbundle(&data->header, data->fd,
103 transport->progress ? BUNDLE_VERBOSE : 0);
104 }
105
106 static int close_bundle(struct transport *transport)
107 {
108 struct bundle_transport_data *data = transport->data;
109 if (data->fd > 0)
110 close(data->fd);
111 free(data);
112 return 0;
113 }
114
115 struct git_transport_data {
116 struct git_transport_options options;
117 struct child_process *conn;
118 int fd[2];
119 unsigned got_remote_heads : 1;
120 struct oid_array extra_have;
121 struct oid_array shallow;
122 };
123
124 static int set_git_option(struct git_transport_options *opts,
125 const char *name, const char *value)
126 {
127 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
128 opts->uploadpack = value;
129 return 0;
130 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
131 opts->receivepack = value;
132 return 0;
133 } else if (!strcmp(name, TRANS_OPT_THIN)) {
134 opts->thin = !!value;
135 return 0;
136 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
137 opts->followtags = !!value;
138 return 0;
139 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
140 opts->keep = !!value;
141 return 0;
142 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
143 opts->update_shallow = !!value;
144 return 0;
145 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
146 if (!value)
147 opts->depth = 0;
148 else {
149 char *end;
150 opts->depth = strtol(value, &end, 0);
151 if (*end)
152 die(_("transport: invalid depth option '%s'"), value);
153 }
154 return 0;
155 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
156 opts->deepen_since = value;
157 return 0;
158 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
159 opts->deepen_not = (const struct string_list *)value;
160 return 0;
161 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
162 opts->deepen_relative = !!value;
163 return 0;
164 }
165 return 1;
166 }
167
168 static int connect_setup(struct transport *transport, int for_push)
169 {
170 struct git_transport_data *data = transport->data;
171 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
172
173 if (data->conn)
174 return 0;
175
176 switch (transport->family) {
177 case TRANSPORT_FAMILY_ALL: break;
178 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
179 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
180 }
181
182 data->conn = git_connect(data->fd, transport->url,
183 for_push ? data->options.receivepack :
184 data->options.uploadpack,
185 flags);
186
187 return 0;
188 }
189
190 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
191 {
192 struct git_transport_data *data = transport->data;
193 struct ref *refs;
194
195 connect_setup(transport, for_push);
196 get_remote_heads(data->fd[0], NULL, 0, &refs,
197 for_push ? REF_NORMAL : 0,
198 &data->extra_have,
199 &data->shallow);
200 data->got_remote_heads = 1;
201
202 return refs;
203 }
204
205 static int fetch_refs_via_pack(struct transport *transport,
206 int nr_heads, struct ref **to_fetch)
207 {
208 int ret = 0;
209 struct git_transport_data *data = transport->data;
210 struct ref *refs;
211 char *dest = xstrdup(transport->url);
212 struct fetch_pack_args args;
213 struct ref *refs_tmp = NULL;
214
215 memset(&args, 0, sizeof(args));
216 args.uploadpack = data->options.uploadpack;
217 args.keep_pack = data->options.keep;
218 args.lock_pack = 1;
219 args.use_thin_pack = data->options.thin;
220 args.include_tag = data->options.followtags;
221 args.verbose = (transport->verbose > 1);
222 args.quiet = (transport->verbose < 0);
223 args.no_progress = !transport->progress;
224 args.depth = data->options.depth;
225 args.deepen_since = data->options.deepen_since;
226 args.deepen_not = data->options.deepen_not;
227 args.deepen_relative = data->options.deepen_relative;
228 args.check_self_contained_and_connected =
229 data->options.check_self_contained_and_connected;
230 args.cloning = transport->cloning;
231 args.update_shallow = data->options.update_shallow;
232
233 if (!data->got_remote_heads) {
234 connect_setup(transport, 0);
235 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
236 NULL, &data->shallow);
237 data->got_remote_heads = 1;
238 }
239
240 refs = fetch_pack(&args, data->fd, data->conn,
241 refs_tmp ? refs_tmp : transport->remote_refs,
242 dest, to_fetch, nr_heads, &data->shallow,
243 &transport->pack_lockfile);
244 close(data->fd[0]);
245 close(data->fd[1]);
246 if (finish_connect(data->conn))
247 ret = -1;
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 if (refs == NULL)
254 ret = -1;
255 if (report_unmatched_refs(to_fetch, nr_heads))
256 ret = -1;
257
258 free_refs(refs_tmp);
259 free_refs(refs);
260 free(dest);
261 return ret;
262 }
263
264 static int push_had_errors(struct ref *ref)
265 {
266 for (; ref; ref = ref->next) {
267 switch (ref->status) {
268 case REF_STATUS_NONE:
269 case REF_STATUS_UPTODATE:
270 case REF_STATUS_OK:
271 break;
272 default:
273 return 1;
274 }
275 }
276 return 0;
277 }
278
279 int transport_refs_pushed(struct ref *ref)
280 {
281 for (; ref; ref = ref->next) {
282 switch(ref->status) {
283 case REF_STATUS_NONE:
284 case REF_STATUS_UPTODATE:
285 break;
286 default:
287 return 1;
288 }
289 }
290 return 0;
291 }
292
293 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
294 {
295 struct refspec rs;
296
297 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
298 return;
299
300 rs.src = ref->name;
301 rs.dst = NULL;
302
303 if (!remote_find_tracking(remote, &rs)) {
304 if (verbose)
305 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
306 if (ref->deletion) {
307 delete_ref(NULL, rs.dst, NULL, 0);
308 } else
309 update_ref("update by push", rs.dst, &ref->new_oid,
310 NULL, 0, 0);
311 free(rs.dst);
312 }
313 }
314
315 static void print_ref_status(char flag, const char *summary,
316 struct ref *to, struct ref *from, const char *msg,
317 int porcelain, int summary_width)
318 {
319 if (porcelain) {
320 if (from)
321 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
322 else
323 fprintf(stdout, "%c\t:%s\t", flag, to->name);
324 if (msg)
325 fprintf(stdout, "%s (%s)\n", summary, msg);
326 else
327 fprintf(stdout, "%s\n", summary);
328 } else {
329 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
330 if (from)
331 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
332 else
333 fputs(prettify_refname(to->name), stderr);
334 if (msg) {
335 fputs(" (", stderr);
336 fputs(msg, stderr);
337 fputc(')', stderr);
338 }
339 fputc('\n', stderr);
340 }
341 }
342
343 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
344 {
345 if (ref->deletion)
346 print_ref_status('-', "[deleted]", ref, NULL, NULL,
347 porcelain, summary_width);
348 else if (is_null_oid(&ref->old_oid))
349 print_ref_status('*',
350 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
351 "[new branch]"),
352 ref, ref->peer_ref, NULL, porcelain, summary_width);
353 else {
354 struct strbuf quickref = STRBUF_INIT;
355 char type;
356 const char *msg;
357
358 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
359 DEFAULT_ABBREV);
360 if (ref->forced_update) {
361 strbuf_addstr(&quickref, "...");
362 type = '+';
363 msg = "forced update";
364 } else {
365 strbuf_addstr(&quickref, "..");
366 type = ' ';
367 msg = NULL;
368 }
369 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
370 DEFAULT_ABBREV);
371
372 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
373 porcelain, summary_width);
374 strbuf_release(&quickref);
375 }
376 }
377
378 static int print_one_push_status(struct ref *ref, const char *dest, int count,
379 int porcelain, int summary_width)
380 {
381 if (!count) {
382 char *url = transport_anonymize_url(dest);
383 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
384 free(url);
385 }
386
387 switch(ref->status) {
388 case REF_STATUS_NONE:
389 print_ref_status('X', "[no match]", ref, NULL, NULL,
390 porcelain, summary_width);
391 break;
392 case REF_STATUS_REJECT_NODELETE:
393 print_ref_status('!', "[rejected]", ref, NULL,
394 "remote does not support deleting refs",
395 porcelain, summary_width);
396 break;
397 case REF_STATUS_UPTODATE:
398 print_ref_status('=', "[up to date]", ref,
399 ref->peer_ref, NULL, porcelain, summary_width);
400 break;
401 case REF_STATUS_REJECT_NONFASTFORWARD:
402 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
403 "non-fast-forward", porcelain, summary_width);
404 break;
405 case REF_STATUS_REJECT_ALREADY_EXISTS:
406 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
407 "already exists", porcelain, summary_width);
408 break;
409 case REF_STATUS_REJECT_FETCH_FIRST:
410 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
411 "fetch first", porcelain, summary_width);
412 break;
413 case REF_STATUS_REJECT_NEEDS_FORCE:
414 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
415 "needs force", porcelain, summary_width);
416 break;
417 case REF_STATUS_REJECT_STALE:
418 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
419 "stale info", porcelain, summary_width);
420 break;
421 case REF_STATUS_REJECT_SHALLOW:
422 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
423 "new shallow roots not allowed",
424 porcelain, summary_width);
425 break;
426 case REF_STATUS_REMOTE_REJECT:
427 print_ref_status('!', "[remote rejected]", ref,
428 ref->deletion ? NULL : ref->peer_ref,
429 ref->remote_status, porcelain, summary_width);
430 break;
431 case REF_STATUS_EXPECTING_REPORT:
432 print_ref_status('!', "[remote failure]", ref,
433 ref->deletion ? NULL : ref->peer_ref,
434 "remote failed to report status",
435 porcelain, summary_width);
436 break;
437 case REF_STATUS_ATOMIC_PUSH_FAILED:
438 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
439 "atomic push failed", porcelain, summary_width);
440 break;
441 case REF_STATUS_OK:
442 print_ok_ref_status(ref, porcelain, summary_width);
443 break;
444 }
445
446 return 1;
447 }
448
449 static int measure_abbrev(const struct object_id *oid, int sofar)
450 {
451 char hex[GIT_MAX_HEXSZ + 1];
452 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
453
454 return (w < sofar) ? sofar : w;
455 }
456
457 int transport_summary_width(const struct ref *refs)
458 {
459 int maxw = -1;
460
461 for (; refs; refs = refs->next) {
462 maxw = measure_abbrev(&refs->old_oid, maxw);
463 maxw = measure_abbrev(&refs->new_oid, maxw);
464 }
465 if (maxw < 0)
466 maxw = FALLBACK_DEFAULT_ABBREV;
467 return (2 * maxw + 3);
468 }
469
470 void transport_print_push_status(const char *dest, struct ref *refs,
471 int verbose, int porcelain, unsigned int *reject_reasons)
472 {
473 struct ref *ref;
474 int n = 0;
475 char *head;
476 int summary_width = transport_summary_width(refs);
477
478 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
479
480 if (verbose) {
481 for (ref = refs; ref; ref = ref->next)
482 if (ref->status == REF_STATUS_UPTODATE)
483 n += print_one_push_status(ref, dest, n,
484 porcelain, summary_width);
485 }
486
487 for (ref = refs; ref; ref = ref->next)
488 if (ref->status == REF_STATUS_OK)
489 n += print_one_push_status(ref, dest, n,
490 porcelain, summary_width);
491
492 *reject_reasons = 0;
493 for (ref = refs; ref; ref = ref->next) {
494 if (ref->status != REF_STATUS_NONE &&
495 ref->status != REF_STATUS_UPTODATE &&
496 ref->status != REF_STATUS_OK)
497 n += print_one_push_status(ref, dest, n,
498 porcelain, summary_width);
499 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
500 if (head != NULL && !strcmp(head, ref->name))
501 *reject_reasons |= REJECT_NON_FF_HEAD;
502 else
503 *reject_reasons |= REJECT_NON_FF_OTHER;
504 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
505 *reject_reasons |= REJECT_ALREADY_EXISTS;
506 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
507 *reject_reasons |= REJECT_FETCH_FIRST;
508 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
509 *reject_reasons |= REJECT_NEEDS_FORCE;
510 }
511 }
512 free(head);
513 }
514
515 void transport_verify_remote_names(int nr_heads, const char **heads)
516 {
517 int i;
518
519 for (i = 0; i < nr_heads; i++) {
520 const char *local = heads[i];
521 const char *remote = strrchr(heads[i], ':');
522
523 if (*local == '+')
524 local++;
525
526 /* A matching refspec is okay. */
527 if (remote == local && remote[1] == '\0')
528 continue;
529
530 remote = remote ? (remote + 1) : local;
531 if (check_refname_format(remote,
532 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
533 die("remote part of refspec is not a valid name in %s",
534 heads[i]);
535 }
536 }
537
538 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
539 {
540 struct git_transport_data *data = transport->data;
541 struct send_pack_args args;
542 int ret;
543
544 if (!data->got_remote_heads) {
545 struct ref *tmp_refs;
546 connect_setup(transport, 1);
547
548 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
549 NULL, &data->shallow);
550 data->got_remote_heads = 1;
551 }
552
553 memset(&args, 0, sizeof(args));
554 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
555 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
556 args.use_thin_pack = data->options.thin;
557 args.verbose = (transport->verbose > 0);
558 args.quiet = (transport->verbose < 0);
559 args.progress = transport->progress;
560 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
561 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
562 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
563 args.push_options = transport->push_options;
564 args.url = transport->url;
565
566 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
567 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
568 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
569 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
570 else
571 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
572
573 ret = send_pack(&args, data->fd, data->conn, remote_refs,
574 &data->extra_have);
575
576 close(data->fd[1]);
577 close(data->fd[0]);
578 ret |= finish_connect(data->conn);
579 data->conn = NULL;
580 data->got_remote_heads = 0;
581
582 return ret;
583 }
584
585 static int connect_git(struct transport *transport, const char *name,
586 const char *executable, int fd[2])
587 {
588 struct git_transport_data *data = transport->data;
589 data->conn = git_connect(data->fd, transport->url,
590 executable, 0);
591 fd[0] = data->fd[0];
592 fd[1] = data->fd[1];
593 return 0;
594 }
595
596 static int disconnect_git(struct transport *transport)
597 {
598 struct git_transport_data *data = transport->data;
599 if (data->conn) {
600 if (data->got_remote_heads)
601 packet_flush(data->fd[1]);
602 close(data->fd[0]);
603 close(data->fd[1]);
604 finish_connect(data->conn);
605 }
606
607 free(data);
608 return 0;
609 }
610
611 static struct transport_vtable taken_over_vtable = {
612 NULL,
613 get_refs_via_connect,
614 fetch_refs_via_pack,
615 git_transport_push,
616 NULL,
617 disconnect_git
618 };
619
620 void transport_take_over(struct transport *transport,
621 struct child_process *child)
622 {
623 struct git_transport_data *data;
624
625 if (!transport->smart_options)
626 die("BUG: taking over transport requires non-NULL "
627 "smart_options field.");
628
629 data = xcalloc(1, sizeof(*data));
630 data->options = *transport->smart_options;
631 data->conn = child;
632 data->fd[0] = data->conn->out;
633 data->fd[1] = data->conn->in;
634 data->got_remote_heads = 0;
635 transport->data = data;
636
637 transport->vtable = &taken_over_vtable;
638 transport->smart_options = &(data->options);
639
640 transport->cannot_reuse = 1;
641 }
642
643 static int is_file(const char *url)
644 {
645 struct stat buf;
646 if (stat(url, &buf))
647 return 0;
648 return S_ISREG(buf.st_mode);
649 }
650
651 static int external_specification_len(const char *url)
652 {
653 return strchr(url, ':') - url;
654 }
655
656 static const struct string_list *protocol_whitelist(void)
657 {
658 static int enabled = -1;
659 static struct string_list allowed = STRING_LIST_INIT_DUP;
660
661 if (enabled < 0) {
662 const char *v = getenv("GIT_ALLOW_PROTOCOL");
663 if (v) {
664 string_list_split(&allowed, v, ':', -1);
665 string_list_sort(&allowed);
666 enabled = 1;
667 } else {
668 enabled = 0;
669 }
670 }
671
672 return enabled ? &allowed : NULL;
673 }
674
675 enum protocol_allow_config {
676 PROTOCOL_ALLOW_NEVER = 0,
677 PROTOCOL_ALLOW_USER_ONLY,
678 PROTOCOL_ALLOW_ALWAYS
679 };
680
681 static enum protocol_allow_config parse_protocol_config(const char *key,
682 const char *value)
683 {
684 if (!strcasecmp(value, "always"))
685 return PROTOCOL_ALLOW_ALWAYS;
686 else if (!strcasecmp(value, "never"))
687 return PROTOCOL_ALLOW_NEVER;
688 else if (!strcasecmp(value, "user"))
689 return PROTOCOL_ALLOW_USER_ONLY;
690
691 die("unknown value for config '%s': %s", key, value);
692 }
693
694 static enum protocol_allow_config get_protocol_config(const char *type)
695 {
696 char *key = xstrfmt("protocol.%s.allow", type);
697 char *value;
698
699 /* first check the per-protocol config */
700 if (!git_config_get_string(key, &value)) {
701 enum protocol_allow_config ret =
702 parse_protocol_config(key, value);
703 free(key);
704 free(value);
705 return ret;
706 }
707 free(key);
708
709 /* if defined, fallback to user-defined default for unknown protocols */
710 if (!git_config_get_string("protocol.allow", &value)) {
711 enum protocol_allow_config ret =
712 parse_protocol_config("protocol.allow", value);
713 free(value);
714 return ret;
715 }
716
717 /* fallback to built-in defaults */
718 /* known safe */
719 if (!strcmp(type, "http") ||
720 !strcmp(type, "https") ||
721 !strcmp(type, "git") ||
722 !strcmp(type, "ssh") ||
723 !strcmp(type, "file"))
724 return PROTOCOL_ALLOW_ALWAYS;
725
726 /* known scary; err on the side of caution */
727 if (!strcmp(type, "ext"))
728 return PROTOCOL_ALLOW_NEVER;
729
730 /* unknown; by default let them be used only directly by the user */
731 return PROTOCOL_ALLOW_USER_ONLY;
732 }
733
734 int is_transport_allowed(const char *type, int from_user)
735 {
736 const struct string_list *whitelist = protocol_whitelist();
737 if (whitelist)
738 return string_list_has_string(whitelist, type);
739
740 switch (get_protocol_config(type)) {
741 case PROTOCOL_ALLOW_ALWAYS:
742 return 1;
743 case PROTOCOL_ALLOW_NEVER:
744 return 0;
745 case PROTOCOL_ALLOW_USER_ONLY:
746 if (from_user < 0)
747 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
748 return from_user;
749 }
750
751 die("BUG: invalid protocol_allow_config type");
752 }
753
754 void transport_check_allowed(const char *type)
755 {
756 if (!is_transport_allowed(type, -1))
757 die("transport '%s' not allowed", type);
758 }
759
760 static struct transport_vtable bundle_vtable = {
761 NULL,
762 get_refs_from_bundle,
763 fetch_refs_from_bundle,
764 NULL,
765 NULL,
766 close_bundle
767 };
768
769 static struct transport_vtable builtin_smart_vtable = {
770 NULL,
771 get_refs_via_connect,
772 fetch_refs_via_pack,
773 git_transport_push,
774 connect_git,
775 disconnect_git
776 };
777
778 struct transport *transport_get(struct remote *remote, const char *url)
779 {
780 const char *helper;
781 struct transport *ret = xcalloc(1, sizeof(*ret));
782
783 ret->progress = isatty(2);
784
785 if (!remote)
786 die("No remote provided to transport_get()");
787
788 ret->got_remote_refs = 0;
789 ret->remote = remote;
790 helper = remote->foreign_vcs;
791
792 if (!url && remote->url)
793 url = remote->url[0];
794 ret->url = url;
795
796 /* maybe it is a foreign URL? */
797 if (url) {
798 const char *p = url;
799
800 while (is_urlschemechar(p == url, *p))
801 p++;
802 if (starts_with(p, "::"))
803 helper = xstrndup(url, p - url);
804 }
805
806 if (helper) {
807 transport_helper_init(ret, helper);
808 } else if (starts_with(url, "rsync:")) {
809 die("git-over-rsync is no longer supported");
810 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
811 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
812 transport_check_allowed("file");
813 ret->data = data;
814 ret->vtable = &bundle_vtable;
815 ret->smart_options = NULL;
816 } else if (!is_url(url)
817 || starts_with(url, "file://")
818 || starts_with(url, "git://")
819 || starts_with(url, "ssh://")
820 || starts_with(url, "git+ssh://") /* deprecated - do not use */
821 || starts_with(url, "ssh+git://") /* deprecated - do not use */
822 ) {
823 /*
824 * These are builtin smart transports; "allowed" transports
825 * will be checked individually in git_connect.
826 */
827 struct git_transport_data *data = xcalloc(1, sizeof(*data));
828 ret->data = data;
829 ret->vtable = &builtin_smart_vtable;
830 ret->smart_options = &(data->options);
831
832 data->conn = NULL;
833 data->got_remote_heads = 0;
834 } else {
835 /* Unknown protocol in URL. Pass to external handler. */
836 int len = external_specification_len(url);
837 char *handler = xmemdupz(url, len);
838 transport_helper_init(ret, handler);
839 }
840
841 if (ret->smart_options) {
842 ret->smart_options->thin = 1;
843 ret->smart_options->uploadpack = "git-upload-pack";
844 if (remote->uploadpack)
845 ret->smart_options->uploadpack = remote->uploadpack;
846 ret->smart_options->receivepack = "git-receive-pack";
847 if (remote->receivepack)
848 ret->smart_options->receivepack = remote->receivepack;
849 }
850
851 return ret;
852 }
853
854 int transport_set_option(struct transport *transport,
855 const char *name, const char *value)
856 {
857 int git_reports = 1, protocol_reports = 1;
858
859 if (transport->smart_options)
860 git_reports = set_git_option(transport->smart_options,
861 name, value);
862
863 if (transport->vtable->set_option)
864 protocol_reports = transport->vtable->set_option(transport,
865 name, value);
866
867 /* If either report is 0, report 0 (success). */
868 if (!git_reports || !protocol_reports)
869 return 0;
870 /* If either reports -1 (invalid value), report -1. */
871 if ((git_reports == -1) || (protocol_reports == -1))
872 return -1;
873 /* Otherwise if both report unknown, report unknown. */
874 return 1;
875 }
876
877 void transport_set_verbosity(struct transport *transport, int verbosity,
878 int force_progress)
879 {
880 if (verbosity >= 1)
881 transport->verbose = verbosity <= 3 ? verbosity : 3;
882 if (verbosity < 0)
883 transport->verbose = -1;
884
885 /**
886 * Rules used to determine whether to report progress (processing aborts
887 * when a rule is satisfied):
888 *
889 * . Report progress, if force_progress is 1 (ie. --progress).
890 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
891 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
892 * . Report progress if isatty(2) is 1.
893 **/
894 if (force_progress >= 0)
895 transport->progress = !!force_progress;
896 else
897 transport->progress = verbosity >= 0 && isatty(2);
898 }
899
900 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
901 {
902 int i;
903
904 fprintf(stderr, _("The following submodule paths contain changes that can\n"
905 "not be found on any remote:\n"));
906 for (i = 0; i < needs_pushing->nr; i++)
907 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
908 fprintf(stderr, _("\nPlease try\n\n"
909 " git push --recurse-submodules=on-demand\n\n"
910 "or cd to the path and use\n\n"
911 " git push\n\n"
912 "to push them to a remote.\n\n"));
913
914 string_list_clear(needs_pushing, 0);
915
916 die(_("Aborting."));
917 }
918
919 static int run_pre_push_hook(struct transport *transport,
920 struct ref *remote_refs)
921 {
922 int ret = 0, x;
923 struct ref *r;
924 struct child_process proc = CHILD_PROCESS_INIT;
925 struct strbuf buf;
926 const char *argv[4];
927
928 if (!(argv[0] = find_hook("pre-push")))
929 return 0;
930
931 argv[1] = transport->remote->name;
932 argv[2] = transport->url;
933 argv[3] = NULL;
934
935 proc.argv = argv;
936 proc.in = -1;
937
938 if (start_command(&proc)) {
939 finish_command(&proc);
940 return -1;
941 }
942
943 sigchain_push(SIGPIPE, SIG_IGN);
944
945 strbuf_init(&buf, 256);
946
947 for (r = remote_refs; r; r = r->next) {
948 if (!r->peer_ref) continue;
949 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
950 if (r->status == REF_STATUS_REJECT_STALE) continue;
951 if (r->status == REF_STATUS_UPTODATE) continue;
952
953 strbuf_reset(&buf);
954 strbuf_addf( &buf, "%s %s %s %s\n",
955 r->peer_ref->name, oid_to_hex(&r->new_oid),
956 r->name, oid_to_hex(&r->old_oid));
957
958 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
959 /* We do not mind if a hook does not read all refs. */
960 if (errno != EPIPE)
961 ret = -1;
962 break;
963 }
964 }
965
966 strbuf_release(&buf);
967
968 x = close(proc.in);
969 if (!ret)
970 ret = x;
971
972 sigchain_pop(SIGPIPE);
973
974 x = finish_command(&proc);
975 if (!ret)
976 ret = x;
977
978 return ret;
979 }
980
981 int transport_push(struct transport *transport,
982 int refspec_nr, const char **refspec, int flags,
983 unsigned int *reject_reasons)
984 {
985 *reject_reasons = 0;
986 transport_verify_remote_names(refspec_nr, refspec);
987
988 if (transport->vtable->push_refs) {
989 struct ref *remote_refs;
990 struct ref *local_refs = get_local_heads();
991 int match_flags = MATCH_REFS_NONE;
992 int verbose = (transport->verbose > 0);
993 int quiet = (transport->verbose < 0);
994 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
995 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
996 int push_ret, ret, err;
997
998 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
999 return -1;
1000
1001 remote_refs = transport->vtable->get_refs_list(transport, 1);
1002
1003 if (flags & TRANSPORT_PUSH_ALL)
1004 match_flags |= MATCH_REFS_ALL;
1005 if (flags & TRANSPORT_PUSH_MIRROR)
1006 match_flags |= MATCH_REFS_MIRROR;
1007 if (flags & TRANSPORT_PUSH_PRUNE)
1008 match_flags |= MATCH_REFS_PRUNE;
1009 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1010 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1011
1012 if (match_push_refs(local_refs, &remote_refs,
1013 refspec_nr, refspec, match_flags)) {
1014 return -1;
1015 }
1016
1017 if (transport->smart_options &&
1018 transport->smart_options->cas &&
1019 !is_empty_cas(transport->smart_options->cas))
1020 apply_push_cas(transport->smart_options->cas,
1021 transport->remote, remote_refs);
1022
1023 set_ref_status_for_push(remote_refs,
1024 flags & TRANSPORT_PUSH_MIRROR,
1025 flags & TRANSPORT_PUSH_FORCE);
1026
1027 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1028 if (run_pre_push_hook(transport, remote_refs))
1029 return -1;
1030
1031 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1032 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1033 !is_bare_repository()) {
1034 struct ref *ref = remote_refs;
1035 struct oid_array commits = OID_ARRAY_INIT;
1036
1037 for (; ref; ref = ref->next)
1038 if (!is_null_oid(&ref->new_oid))
1039 oid_array_append(&commits,
1040 &ref->new_oid);
1041
1042 if (!push_unpushed_submodules(&commits,
1043 transport->remote,
1044 refspec, refspec_nr,
1045 transport->push_options,
1046 pretend)) {
1047 oid_array_clear(&commits);
1048 die("Failed to push all needed submodules!");
1049 }
1050 oid_array_clear(&commits);
1051 }
1052
1053 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1054 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1055 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1056 !pretend)) && !is_bare_repository()) {
1057 struct ref *ref = remote_refs;
1058 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1059 struct oid_array commits = OID_ARRAY_INIT;
1060
1061 for (; ref; ref = ref->next)
1062 if (!is_null_oid(&ref->new_oid))
1063 oid_array_append(&commits,
1064 &ref->new_oid);
1065
1066 if (find_unpushed_submodules(&commits, transport->remote->name,
1067 &needs_pushing)) {
1068 oid_array_clear(&commits);
1069 die_with_unpushed_submodules(&needs_pushing);
1070 }
1071 string_list_clear(&needs_pushing, 0);
1072 oid_array_clear(&commits);
1073 }
1074
1075 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1076 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1077 else
1078 push_ret = 0;
1079 err = push_had_errors(remote_refs);
1080 ret = push_ret | err;
1081
1082 if (!quiet || err)
1083 transport_print_push_status(transport->url, remote_refs,
1084 verbose | porcelain, porcelain,
1085 reject_reasons);
1086
1087 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1088 set_upstreams(transport, remote_refs, pretend);
1089
1090 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1091 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1092 struct ref *ref;
1093 for (ref = remote_refs; ref; ref = ref->next)
1094 transport_update_tracking_ref(transport->remote, ref, verbose);
1095 }
1096
1097 if (porcelain && !push_ret)
1098 puts("Done");
1099 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1100 fprintf(stderr, "Everything up-to-date\n");
1101
1102 return ret;
1103 }
1104 return 1;
1105 }
1106
1107 const struct ref *transport_get_remote_refs(struct transport *transport)
1108 {
1109 if (!transport->got_remote_refs) {
1110 transport->remote_refs = transport->vtable->get_refs_list(transport, 0);
1111 transport->got_remote_refs = 1;
1112 }
1113
1114 return transport->remote_refs;
1115 }
1116
1117 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1118 {
1119 int rc;
1120 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1121 struct ref **heads = NULL;
1122 struct ref *rm;
1123
1124 for (rm = refs; rm; rm = rm->next) {
1125 nr_refs++;
1126 if (rm->peer_ref &&
1127 !is_null_oid(&rm->old_oid) &&
1128 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1129 continue;
1130 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1131 heads[nr_heads++] = rm;
1132 }
1133
1134 if (!nr_heads) {
1135 /*
1136 * When deepening of a shallow repository is requested,
1137 * then local and remote refs are likely to still be equal.
1138 * Just feed them all to the fetch method in that case.
1139 * This condition shouldn't be met in a non-deepening fetch
1140 * (see builtin/fetch.c:quickfetch()).
1141 */
1142 ALLOC_ARRAY(heads, nr_refs);
1143 for (rm = refs; rm; rm = rm->next)
1144 heads[nr_heads++] = rm;
1145 }
1146
1147 rc = transport->vtable->fetch(transport, nr_heads, heads);
1148
1149 free(heads);
1150 return rc;
1151 }
1152
1153 void transport_unlock_pack(struct transport *transport)
1154 {
1155 if (transport->pack_lockfile) {
1156 unlink_or_warn(transport->pack_lockfile);
1157 FREE_AND_NULL(transport->pack_lockfile);
1158 }
1159 }
1160
1161 int transport_connect(struct transport *transport, const char *name,
1162 const char *exec, int fd[2])
1163 {
1164 if (transport->vtable->connect)
1165 return transport->vtable->connect(transport, name, exec, fd);
1166 else
1167 die("Operation not supported by protocol");
1168 }
1169
1170 int transport_disconnect(struct transport *transport)
1171 {
1172 int ret = 0;
1173 if (transport->vtable->disconnect)
1174 ret = transport->vtable->disconnect(transport);
1175 free(transport);
1176 return ret;
1177 }
1178
1179 /*
1180 * Strip username (and password) from a URL and return
1181 * it in a newly allocated string.
1182 */
1183 char *transport_anonymize_url(const char *url)
1184 {
1185 char *scheme_prefix, *anon_part;
1186 size_t anon_len, prefix_len = 0;
1187
1188 anon_part = strchr(url, '@');
1189 if (url_is_local_not_ssh(url) || !anon_part)
1190 goto literal_copy;
1191
1192 anon_len = strlen(++anon_part);
1193 scheme_prefix = strstr(url, "://");
1194 if (!scheme_prefix) {
1195 if (!strchr(anon_part, ':'))
1196 /* cannot be "me@there:/path/name" */
1197 goto literal_copy;
1198 } else {
1199 const char *cp;
1200 /* make sure scheme is reasonable */
1201 for (cp = url; cp < scheme_prefix; cp++) {
1202 switch (*cp) {
1203 /* RFC 1738 2.1 */
1204 case '+': case '.': case '-':
1205 break; /* ok */
1206 default:
1207 if (isalnum(*cp))
1208 break;
1209 /* it isn't */
1210 goto literal_copy;
1211 }
1212 }
1213 /* @ past the first slash does not count */
1214 cp = strchr(scheme_prefix + 3, '/');
1215 if (cp && cp < anon_part)
1216 goto literal_copy;
1217 prefix_len = scheme_prefix - url + 3;
1218 }
1219 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1220 (int)anon_len, anon_part);
1221 literal_copy:
1222 return xstrdup(url);
1223 }
1224
1225 static void read_alternate_refs(const char *path,
1226 alternate_ref_fn *cb,
1227 void *data)
1228 {
1229 struct child_process cmd = CHILD_PROCESS_INIT;
1230 struct strbuf line = STRBUF_INIT;
1231 FILE *fh;
1232
1233 cmd.git_cmd = 1;
1234 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1235 argv_array_push(&cmd.args, "for-each-ref");
1236 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1237 cmd.env = local_repo_env;
1238 cmd.out = -1;
1239
1240 if (start_command(&cmd))
1241 return;
1242
1243 fh = xfdopen(cmd.out, "r");
1244 while (strbuf_getline_lf(&line, fh) != EOF) {
1245 struct object_id oid;
1246
1247 if (get_oid_hex(line.buf, &oid) ||
1248 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1249 warning("invalid line while parsing alternate refs: %s",
1250 line.buf);
1251 break;
1252 }
1253
1254 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1255 }
1256
1257 fclose(fh);
1258 finish_command(&cmd);
1259 }
1260
1261 struct alternate_refs_data {
1262 alternate_ref_fn *fn;
1263 void *data;
1264 };
1265
1266 static int refs_from_alternate_cb(struct alternate_object_database *e,
1267 void *data)
1268 {
1269 struct strbuf path = STRBUF_INIT;
1270 size_t base_len;
1271 struct alternate_refs_data *cb = data;
1272
1273 if (!strbuf_realpath(&path, e->path, 0))
1274 goto out;
1275 if (!strbuf_strip_suffix(&path, "/objects"))
1276 goto out;
1277 base_len = path.len;
1278
1279 /* Is this a git repository with refs? */
1280 strbuf_addstr(&path, "/refs");
1281 if (!is_directory(path.buf))
1282 goto out;
1283 strbuf_setlen(&path, base_len);
1284
1285 read_alternate_refs(path.buf, cb->fn, cb->data);
1286
1287 out:
1288 strbuf_release(&path);
1289 return 0;
1290 }
1291
1292 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1293 {
1294 struct alternate_refs_data cb;
1295 cb.fn = fn;
1296 cb.data = data;
1297 foreach_alt_odb(refs_from_alternate_cb, &cb);
1298 }
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