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Merge branch 'jk/gc-pre-detach-under-hook'
[git/debian.git] / transport.c
blobd75ff0514d8d4dd05da1d618ddf2602e5a4f26a9
1 #include "cache.h"
2 #include "config.h"
3 #include "transport.h"
4 #include "run-command.h"
5 #include "pkt-line.h"
6 #include "fetch-pack.h"
7 #include "remote.h"
8 #include "connect.h"
9 #include "send-pack.h"
10 #include "walker.h"
11 #include "bundle.h"
12 #include "dir.h"
13 #include "refs.h"
14 #include "branch.h"
15 #include "url.h"
16 #include "submodule.h"
17 #include "string-list.h"
18 #include "sha1-array.h"
19 #include "sigchain.h"
20
21 static void set_upstreams(struct transport *transport, struct ref *refs,
22 int pretend)
23 {
24 struct ref *ref;
25 for (ref = refs; ref; ref = ref->next) {
26 const char *localname;
27 const char *tmp;
28 const char *remotename;
29 unsigned char sha[20];
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 sha, &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,
310 ref->new_oid.hash, 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 struct object_id head_oid;
476 char *head;
477 int summary_width = transport_summary_width(refs);
478
479 head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL);
480
481 if (verbose) {
482 for (ref = refs; ref; ref = ref->next)
483 if (ref->status == REF_STATUS_UPTODATE)
484 n += print_one_push_status(ref, dest, n,
485 porcelain, summary_width);
486 }
487
488 for (ref = refs; ref; ref = ref->next)
489 if (ref->status == REF_STATUS_OK)
490 n += print_one_push_status(ref, dest, n,
491 porcelain, summary_width);
492
493 *reject_reasons = 0;
494 for (ref = refs; ref; ref = ref->next) {
495 if (ref->status != REF_STATUS_NONE &&
496 ref->status != REF_STATUS_UPTODATE &&
497 ref->status != REF_STATUS_OK)
498 n += print_one_push_status(ref, dest, n,
499 porcelain, summary_width);
500 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
501 if (head != NULL && !strcmp(head, ref->name))
502 *reject_reasons |= REJECT_NON_FF_HEAD;
503 else
504 *reject_reasons |= REJECT_NON_FF_OTHER;
505 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
506 *reject_reasons |= REJECT_ALREADY_EXISTS;
507 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
508 *reject_reasons |= REJECT_FETCH_FIRST;
509 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
510 *reject_reasons |= REJECT_NEEDS_FORCE;
511 }
512 }
513 free(head);
514 }
515
516 void transport_verify_remote_names(int nr_heads, const char **heads)
517 {
518 int i;
519
520 for (i = 0; i < nr_heads; i++) {
521 const char *local = heads[i];
522 const char *remote = strrchr(heads[i], ':');
523
524 if (*local == '+')
525 local++;
526
527 /* A matching refspec is okay. */
528 if (remote == local && remote[1] == '\0')
529 continue;
530
531 remote = remote ? (remote + 1) : local;
532 if (check_refname_format(remote,
533 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
534 die("remote part of refspec is not a valid name in %s",
535 heads[i]);
536 }
537 }
538
539 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
540 {
541 struct git_transport_data *data = transport->data;
542 struct send_pack_args args;
543 int ret;
544
545 if (!data->got_remote_heads) {
546 struct ref *tmp_refs;
547 connect_setup(transport, 1);
548
549 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
550 NULL, &data->shallow);
551 data->got_remote_heads = 1;
552 }
553
554 memset(&args, 0, sizeof(args));
555 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
556 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
557 args.use_thin_pack = data->options.thin;
558 args.verbose = (transport->verbose > 0);
559 args.quiet = (transport->verbose < 0);
560 args.progress = transport->progress;
561 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
562 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
563 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
564 args.push_options = transport->push_options;
565 args.url = transport->url;
566
567 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
568 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
569 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
570 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
571 else
572 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
573
574 ret = send_pack(&args, data->fd, data->conn, remote_refs,
575 &data->extra_have);
576
577 close(data->fd[1]);
578 close(data->fd[0]);
579 ret |= finish_connect(data->conn);
580 data->conn = NULL;
581 data->got_remote_heads = 0;
582
583 return ret;
584 }
585
586 static int connect_git(struct transport *transport, const char *name,
587 const char *executable, int fd[2])
588 {
589 struct git_transport_data *data = transport->data;
590 data->conn = git_connect(data->fd, transport->url,
591 executable, 0);
592 fd[0] = data->fd[0];
593 fd[1] = data->fd[1];
594 return 0;
595 }
596
597 static int disconnect_git(struct transport *transport)
598 {
599 struct git_transport_data *data = transport->data;
600 if (data->conn) {
601 if (data->got_remote_heads)
602 packet_flush(data->fd[1]);
603 close(data->fd[0]);
604 close(data->fd[1]);
605 finish_connect(data->conn);
606 }
607
608 free(data);
609 return 0;
610 }
611
612 void transport_take_over(struct transport *transport,
613 struct child_process *child)
614 {
615 struct git_transport_data *data;
616
617 if (!transport->smart_options)
618 die("BUG: taking over transport requires non-NULL "
619 "smart_options field.");
620
621 data = xcalloc(1, sizeof(*data));
622 data->options = *transport->smart_options;
623 data->conn = child;
624 data->fd[0] = data->conn->out;
625 data->fd[1] = data->conn->in;
626 data->got_remote_heads = 0;
627 transport->data = data;
628
629 transport->set_option = NULL;
630 transport->get_refs_list = get_refs_via_connect;
631 transport->fetch = fetch_refs_via_pack;
632 transport->push = NULL;
633 transport->push_refs = git_transport_push;
634 transport->disconnect = disconnect_git;
635 transport->smart_options = &(data->options);
636
637 transport->cannot_reuse = 1;
638 }
639
640 static int is_file(const char *url)
641 {
642 struct stat buf;
643 if (stat(url, &buf))
644 return 0;
645 return S_ISREG(buf.st_mode);
646 }
647
648 static int external_specification_len(const char *url)
649 {
650 return strchr(url, ':') - url;
651 }
652
653 static const struct string_list *protocol_whitelist(void)
654 {
655 static int enabled = -1;
656 static struct string_list allowed = STRING_LIST_INIT_DUP;
657
658 if (enabled < 0) {
659 const char *v = getenv("GIT_ALLOW_PROTOCOL");
660 if (v) {
661 string_list_split(&allowed, v, ':', -1);
662 string_list_sort(&allowed);
663 enabled = 1;
664 } else {
665 enabled = 0;
666 }
667 }
668
669 return enabled ? &allowed : NULL;
670 }
671
672 enum protocol_allow_config {
673 PROTOCOL_ALLOW_NEVER = 0,
674 PROTOCOL_ALLOW_USER_ONLY,
675 PROTOCOL_ALLOW_ALWAYS
676 };
677
678 static enum protocol_allow_config parse_protocol_config(const char *key,
679 const char *value)
680 {
681 if (!strcasecmp(value, "always"))
682 return PROTOCOL_ALLOW_ALWAYS;
683 else if (!strcasecmp(value, "never"))
684 return PROTOCOL_ALLOW_NEVER;
685 else if (!strcasecmp(value, "user"))
686 return PROTOCOL_ALLOW_USER_ONLY;
687
688 die("unknown value for config '%s': %s", key, value);
689 }
690
691 static enum protocol_allow_config get_protocol_config(const char *type)
692 {
693 char *key = xstrfmt("protocol.%s.allow", type);
694 char *value;
695
696 /* first check the per-protocol config */
697 if (!git_config_get_string(key, &value)) {
698 enum protocol_allow_config ret =
699 parse_protocol_config(key, value);
700 free(key);
701 free(value);
702 return ret;
703 }
704 free(key);
705
706 /* if defined, fallback to user-defined default for unknown protocols */
707 if (!git_config_get_string("protocol.allow", &value)) {
708 enum protocol_allow_config ret =
709 parse_protocol_config("protocol.allow", value);
710 free(value);
711 return ret;
712 }
713
714 /* fallback to built-in defaults */
715 /* known safe */
716 if (!strcmp(type, "http") ||
717 !strcmp(type, "https") ||
718 !strcmp(type, "git") ||
719 !strcmp(type, "ssh") ||
720 !strcmp(type, "file"))
721 return PROTOCOL_ALLOW_ALWAYS;
722
723 /* known scary; err on the side of caution */
724 if (!strcmp(type, "ext"))
725 return PROTOCOL_ALLOW_NEVER;
726
727 /* unknown; by default let them be used only directly by the user */
728 return PROTOCOL_ALLOW_USER_ONLY;
729 }
730
731 int is_transport_allowed(const char *type, int from_user)
732 {
733 const struct string_list *whitelist = protocol_whitelist();
734 if (whitelist)
735 return string_list_has_string(whitelist, type);
736
737 switch (get_protocol_config(type)) {
738 case PROTOCOL_ALLOW_ALWAYS:
739 return 1;
740 case PROTOCOL_ALLOW_NEVER:
741 return 0;
742 case PROTOCOL_ALLOW_USER_ONLY:
743 if (from_user < 0)
744 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
745 return from_user;
746 }
747
748 die("BUG: invalid protocol_allow_config type");
749 }
750
751 void transport_check_allowed(const char *type)
752 {
753 if (!is_transport_allowed(type, -1))
754 die("transport '%s' not allowed", type);
755 }
756
757 struct transport *transport_get(struct remote *remote, const char *url)
758 {
759 const char *helper;
760 struct transport *ret = xcalloc(1, sizeof(*ret));
761
762 ret->progress = isatty(2);
763
764 if (!remote)
765 die("No remote provided to transport_get()");
766
767 ret->got_remote_refs = 0;
768 ret->remote = remote;
769 helper = remote->foreign_vcs;
770
771 if (!url && remote->url)
772 url = remote->url[0];
773 ret->url = url;
774
775 /* maybe it is a foreign URL? */
776 if (url) {
777 const char *p = url;
778
779 while (is_urlschemechar(p == url, *p))
780 p++;
781 if (starts_with(p, "::"))
782 helper = xstrndup(url, p - url);
783 }
784
785 if (helper) {
786 transport_helper_init(ret, helper);
787 } else if (starts_with(url, "rsync:")) {
788 die("git-over-rsync is no longer supported");
789 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
790 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
791 transport_check_allowed("file");
792 ret->data = data;
793 ret->get_refs_list = get_refs_from_bundle;
794 ret->fetch = fetch_refs_from_bundle;
795 ret->disconnect = close_bundle;
796 ret->smart_options = NULL;
797 } else if (!is_url(url)
798 || starts_with(url, "file://")
799 || starts_with(url, "git://")
800 || starts_with(url, "ssh://")
801 || starts_with(url, "git+ssh://") /* deprecated - do not use */
802 || starts_with(url, "ssh+git://") /* deprecated - do not use */
803 ) {
804 /*
805 * These are builtin smart transports; "allowed" transports
806 * will be checked individually in git_connect.
807 */
808 struct git_transport_data *data = xcalloc(1, sizeof(*data));
809 ret->data = data;
810 ret->set_option = NULL;
811 ret->get_refs_list = get_refs_via_connect;
812 ret->fetch = fetch_refs_via_pack;
813 ret->push_refs = git_transport_push;
814 ret->connect = connect_git;
815 ret->disconnect = disconnect_git;
816 ret->smart_options = &(data->options);
817
818 data->conn = NULL;
819 data->got_remote_heads = 0;
820 } else {
821 /* Unknown protocol in URL. Pass to external handler. */
822 int len = external_specification_len(url);
823 char *handler = xmemdupz(url, len);
824 transport_helper_init(ret, handler);
825 }
826
827 if (ret->smart_options) {
828 ret->smart_options->thin = 1;
829 ret->smart_options->uploadpack = "git-upload-pack";
830 if (remote->uploadpack)
831 ret->smart_options->uploadpack = remote->uploadpack;
832 ret->smart_options->receivepack = "git-receive-pack";
833 if (remote->receivepack)
834 ret->smart_options->receivepack = remote->receivepack;
835 }
836
837 return ret;
838 }
839
840 int transport_set_option(struct transport *transport,
841 const char *name, const char *value)
842 {
843 int git_reports = 1, protocol_reports = 1;
844
845 if (transport->smart_options)
846 git_reports = set_git_option(transport->smart_options,
847 name, value);
848
849 if (transport->set_option)
850 protocol_reports = transport->set_option(transport, name,
851 value);
852
853 /* If either report is 0, report 0 (success). */
854 if (!git_reports || !protocol_reports)
855 return 0;
856 /* If either reports -1 (invalid value), report -1. */
857 if ((git_reports == -1) || (protocol_reports == -1))
858 return -1;
859 /* Otherwise if both report unknown, report unknown. */
860 return 1;
861 }
862
863 void transport_set_verbosity(struct transport *transport, int verbosity,
864 int force_progress)
865 {
866 if (verbosity >= 1)
867 transport->verbose = verbosity <= 3 ? verbosity : 3;
868 if (verbosity < 0)
869 transport->verbose = -1;
870
871 /**
872 * Rules used to determine whether to report progress (processing aborts
873 * when a rule is satisfied):
874 *
875 * . Report progress, if force_progress is 1 (ie. --progress).
876 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
877 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
878 * . Report progress if isatty(2) is 1.
879 **/
880 if (force_progress >= 0)
881 transport->progress = !!force_progress;
882 else
883 transport->progress = verbosity >= 0 && isatty(2);
884 }
885
886 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
887 {
888 int i;
889
890 fprintf(stderr, _("The following submodule paths contain changes that can\n"
891 "not be found on any remote:\n"));
892 for (i = 0; i < needs_pushing->nr; i++)
893 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
894 fprintf(stderr, _("\nPlease try\n\n"
895 " git push --recurse-submodules=on-demand\n\n"
896 "or cd to the path and use\n\n"
897 " git push\n\n"
898 "to push them to a remote.\n\n"));
899
900 string_list_clear(needs_pushing, 0);
901
902 die(_("Aborting."));
903 }
904
905 static int run_pre_push_hook(struct transport *transport,
906 struct ref *remote_refs)
907 {
908 int ret = 0, x;
909 struct ref *r;
910 struct child_process proc = CHILD_PROCESS_INIT;
911 struct strbuf buf;
912 const char *argv[4];
913
914 if (!(argv[0] = find_hook("pre-push")))
915 return 0;
916
917 argv[1] = transport->remote->name;
918 argv[2] = transport->url;
919 argv[3] = NULL;
920
921 proc.argv = argv;
922 proc.in = -1;
923
924 if (start_command(&proc)) {
925 finish_command(&proc);
926 return -1;
927 }
928
929 sigchain_push(SIGPIPE, SIG_IGN);
930
931 strbuf_init(&buf, 256);
932
933 for (r = remote_refs; r; r = r->next) {
934 if (!r->peer_ref) continue;
935 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
936 if (r->status == REF_STATUS_REJECT_STALE) continue;
937 if (r->status == REF_STATUS_UPTODATE) continue;
938
939 strbuf_reset(&buf);
940 strbuf_addf( &buf, "%s %s %s %s\n",
941 r->peer_ref->name, oid_to_hex(&r->new_oid),
942 r->name, oid_to_hex(&r->old_oid));
943
944 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
945 /* We do not mind if a hook does not read all refs. */
946 if (errno != EPIPE)
947 ret = -1;
948 break;
949 }
950 }
951
952 strbuf_release(&buf);
953
954 x = close(proc.in);
955 if (!ret)
956 ret = x;
957
958 sigchain_pop(SIGPIPE);
959
960 x = finish_command(&proc);
961 if (!ret)
962 ret = x;
963
964 return ret;
965 }
966
967 int transport_push(struct transport *transport,
968 int refspec_nr, const char **refspec, int flags,
969 unsigned int *reject_reasons)
970 {
971 *reject_reasons = 0;
972 transport_verify_remote_names(refspec_nr, refspec);
973
974 if (transport->push) {
975 /* Maybe FIXME. But no important transport uses this case. */
976 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
977 die("This transport does not support using --set-upstream");
978
979 return transport->push(transport, refspec_nr, refspec, flags);
980 } else if (transport->push_refs) {
981 struct ref *remote_refs;
982 struct ref *local_refs = get_local_heads();
983 int match_flags = MATCH_REFS_NONE;
984 int verbose = (transport->verbose > 0);
985 int quiet = (transport->verbose < 0);
986 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
987 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
988 int push_ret, ret, err;
989
990 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
991 return -1;
992
993 remote_refs = transport->get_refs_list(transport, 1);
994
995 if (flags & TRANSPORT_PUSH_ALL)
996 match_flags |= MATCH_REFS_ALL;
997 if (flags & TRANSPORT_PUSH_MIRROR)
998 match_flags |= MATCH_REFS_MIRROR;
999 if (flags & TRANSPORT_PUSH_PRUNE)
1000 match_flags |= MATCH_REFS_PRUNE;
1001 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1002 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1003
1004 if (match_push_refs(local_refs, &remote_refs,
1005 refspec_nr, refspec, match_flags)) {
1006 return -1;
1007 }
1008
1009 if (transport->smart_options &&
1010 transport->smart_options->cas &&
1011 !is_empty_cas(transport->smart_options->cas))
1012 apply_push_cas(transport->smart_options->cas,
1013 transport->remote, remote_refs);
1014
1015 set_ref_status_for_push(remote_refs,
1016 flags & TRANSPORT_PUSH_MIRROR,
1017 flags & TRANSPORT_PUSH_FORCE);
1018
1019 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1020 if (run_pre_push_hook(transport, remote_refs))
1021 return -1;
1022
1023 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1024 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1025 !is_bare_repository()) {
1026 struct ref *ref = remote_refs;
1027 struct oid_array commits = OID_ARRAY_INIT;
1028
1029 for (; ref; ref = ref->next)
1030 if (!is_null_oid(&ref->new_oid))
1031 oid_array_append(&commits,
1032 &ref->new_oid);
1033
1034 if (!push_unpushed_submodules(&commits,
1035 transport->remote,
1036 refspec, refspec_nr,
1037 transport->push_options,
1038 pretend)) {
1039 oid_array_clear(&commits);
1040 die("Failed to push all needed submodules!");
1041 }
1042 oid_array_clear(&commits);
1043 }
1044
1045 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1046 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1047 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1048 !pretend)) && !is_bare_repository()) {
1049 struct ref *ref = remote_refs;
1050 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1051 struct oid_array commits = OID_ARRAY_INIT;
1052
1053 for (; ref; ref = ref->next)
1054 if (!is_null_oid(&ref->new_oid))
1055 oid_array_append(&commits,
1056 &ref->new_oid);
1057
1058 if (find_unpushed_submodules(&commits, transport->remote->name,
1059 &needs_pushing)) {
1060 oid_array_clear(&commits);
1061 die_with_unpushed_submodules(&needs_pushing);
1062 }
1063 string_list_clear(&needs_pushing, 0);
1064 oid_array_clear(&commits);
1065 }
1066
1067 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1068 push_ret = transport->push_refs(transport, remote_refs, flags);
1069 else
1070 push_ret = 0;
1071 err = push_had_errors(remote_refs);
1072 ret = push_ret | err;
1073
1074 if (!quiet || err)
1075 transport_print_push_status(transport->url, remote_refs,
1076 verbose | porcelain, porcelain,
1077 reject_reasons);
1078
1079 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1080 set_upstreams(transport, remote_refs, pretend);
1081
1082 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1083 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1084 struct ref *ref;
1085 for (ref = remote_refs; ref; ref = ref->next)
1086 transport_update_tracking_ref(transport->remote, ref, verbose);
1087 }
1088
1089 if (porcelain && !push_ret)
1090 puts("Done");
1091 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1092 fprintf(stderr, "Everything up-to-date\n");
1093
1094 return ret;
1095 }
1096 return 1;
1097 }
1098
1099 const struct ref *transport_get_remote_refs(struct transport *transport)
1100 {
1101 if (!transport->got_remote_refs) {
1102 transport->remote_refs = transport->get_refs_list(transport, 0);
1103 transport->got_remote_refs = 1;
1104 }
1105
1106 return transport->remote_refs;
1107 }
1108
1109 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1110 {
1111 int rc;
1112 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1113 struct ref **heads = NULL;
1114 struct ref *rm;
1115
1116 for (rm = refs; rm; rm = rm->next) {
1117 nr_refs++;
1118 if (rm->peer_ref &&
1119 !is_null_oid(&rm->old_oid) &&
1120 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1121 continue;
1122 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1123 heads[nr_heads++] = rm;
1124 }
1125
1126 if (!nr_heads) {
1127 /*
1128 * When deepening of a shallow repository is requested,
1129 * then local and remote refs are likely to still be equal.
1130 * Just feed them all to the fetch method in that case.
1131 * This condition shouldn't be met in a non-deepening fetch
1132 * (see builtin/fetch.c:quickfetch()).
1133 */
1134 ALLOC_ARRAY(heads, nr_refs);
1135 for (rm = refs; rm; rm = rm->next)
1136 heads[nr_heads++] = rm;
1137 }
1138
1139 rc = transport->fetch(transport, nr_heads, heads);
1140
1141 free(heads);
1142 return rc;
1143 }
1144
1145 void transport_unlock_pack(struct transport *transport)
1146 {
1147 if (transport->pack_lockfile) {
1148 unlink_or_warn(transport->pack_lockfile);
1149 FREE_AND_NULL(transport->pack_lockfile);
1150 }
1151 }
1152
1153 int transport_connect(struct transport *transport, const char *name,
1154 const char *exec, int fd[2])
1155 {
1156 if (transport->connect)
1157 return transport->connect(transport, name, exec, fd);
1158 else
1159 die("Operation not supported by protocol");
1160 }
1161
1162 int transport_disconnect(struct transport *transport)
1163 {
1164 int ret = 0;
1165 if (transport->disconnect)
1166 ret = transport->disconnect(transport);
1167 free(transport);
1168 return ret;
1169 }
1170
1171 /*
1172 * Strip username (and password) from a URL and return
1173 * it in a newly allocated string.
1174 */
1175 char *transport_anonymize_url(const char *url)
1176 {
1177 char *scheme_prefix, *anon_part;
1178 size_t anon_len, prefix_len = 0;
1179
1180 anon_part = strchr(url, '@');
1181 if (url_is_local_not_ssh(url) || !anon_part)
1182 goto literal_copy;
1183
1184 anon_len = strlen(++anon_part);
1185 scheme_prefix = strstr(url, "://");
1186 if (!scheme_prefix) {
1187 if (!strchr(anon_part, ':'))
1188 /* cannot be "me@there:/path/name" */
1189 goto literal_copy;
1190 } else {
1191 const char *cp;
1192 /* make sure scheme is reasonable */
1193 for (cp = url; cp < scheme_prefix; cp++) {
1194 switch (*cp) {
1195 /* RFC 1738 2.1 */
1196 case '+': case '.': case '-':
1197 break; /* ok */
1198 default:
1199 if (isalnum(*cp))
1200 break;
1201 /* it isn't */
1202 goto literal_copy;
1203 }
1204 }
1205 /* @ past the first slash does not count */
1206 cp = strchr(scheme_prefix + 3, '/');
1207 if (cp && cp < anon_part)
1208 goto literal_copy;
1209 prefix_len = scheme_prefix - url + 3;
1210 }
1211 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1212 (int)anon_len, anon_part);
1213 literal_copy:
1214 return xstrdup(url);
1215 }
1216
1217 static void read_alternate_refs(const char *path,
1218 alternate_ref_fn *cb,
1219 void *data)
1220 {
1221 struct child_process cmd = CHILD_PROCESS_INIT;
1222 struct strbuf line = STRBUF_INIT;
1223 FILE *fh;
1224
1225 cmd.git_cmd = 1;
1226 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1227 argv_array_push(&cmd.args, "for-each-ref");
1228 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1229 cmd.env = local_repo_env;
1230 cmd.out = -1;
1231
1232 if (start_command(&cmd))
1233 return;
1234
1235 fh = xfdopen(cmd.out, "r");
1236 while (strbuf_getline_lf(&line, fh) != EOF) {
1237 struct object_id oid;
1238
1239 if (get_oid_hex(line.buf, &oid) ||
1240 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1241 warning("invalid line while parsing alternate refs: %s",
1242 line.buf);
1243 break;
1244 }
1245
1246 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1247 }
1248
1249 fclose(fh);
1250 finish_command(&cmd);
1251 }
1252
1253 struct alternate_refs_data {
1254 alternate_ref_fn *fn;
1255 void *data;
1256 };
1257
1258 static int refs_from_alternate_cb(struct alternate_object_database *e,
1259 void *data)
1260 {
1261 struct strbuf path = STRBUF_INIT;
1262 size_t base_len;
1263 struct alternate_refs_data *cb = data;
1264
1265 if (!strbuf_realpath(&path, e->path, 0))
1266 goto out;
1267 if (!strbuf_strip_suffix(&path, "/objects"))
1268 goto out;
1269 base_len = path.len;
1270
1271 /* Is this a git repository with refs? */
1272 strbuf_addstr(&path, "/refs");
1273 if (!is_directory(path.buf))
1274 goto out;
1275 strbuf_setlen(&path, base_len);
1276
1277 read_alternate_refs(path.buf, cb->fn, cb->data);
1278
1279 out:
1280 strbuf_release(&path);
1281 return 0;
1282 }
1283
1284 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1285 {
1286 struct alternate_refs_data cb;
1287 cb.fn = fn;
1288 cb.data = data;
1289 foreach_alt_odb(refs_from_alternate_cb, &cb);
1290 }
git for Debian