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#include "protocol.h"
22static void set_upstreams(struct transport *transport, struct ref *refs,
24 int pretend)
25{
26 struct ref *ref;
27 for (ref = refs; ref; ref = ref->next) {
28 const char *localname;
29 const char *tmp;
30 const char *remotename;
31 int flag = 0;
32 /*
33 * Check suitability for tracking. Must be successful /
34 * already up-to-date ref create/modify (not delete).
35 */
36 if (ref->status != REF_STATUS_OK &&
37 ref->status != REF_STATUS_UPTODATE)
38 continue;
39 if (!ref->peer_ref)
40 continue;
41 if (is_null_oid(&ref->new_oid))
42 continue;
43 /* Follow symbolic refs (mainly for HEAD). */
45 localname = ref->peer_ref->name;
46 remotename = ref->name;
47 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
48 NULL, &flag);
49 if (tmp && flag & REF_ISSYMREF &&
50 starts_with(tmp, "refs/heads/"))
51 localname = tmp;
52 /* Both source and destination must be local branches. */
54 if (!localname || !starts_with(localname, "refs/heads/"))
55 continue;
56 if (!remotename || !starts_with(remotename, "refs/heads/"))
57 continue;
58 if (!pretend)
60 install_branch_config(BRANCH_CONFIG_VERBOSE,
61 localname + 11, transport->remote->name,
62 remotename);
63 else
64 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
65 localname + 11, remotename + 11,
66 transport->remote->name);
67 }
68}
69struct bundle_transport_data {
71 int fd;
72 struct bundle_header header;
73};
74static struct ref *get_refs_from_bundle(struct transport *transport,
76 int for_push,
77 const struct argv_array *ref_prefixes)
78{
79 struct bundle_transport_data *data = transport->data;
80 struct ref *result = NULL;
81 int i;
82 if (for_push)
84 return NULL;
85 if (data->fd > 0)
87 close(data->fd);
88 data->fd = read_bundle_header(transport->url, &data->header);
89 if (data->fd < 0)
90 die ("Could not read bundle '%s'.", transport->url);
91 for (i = 0; i < data->header.references.nr; i++) {
92 struct ref_list_entry *e = data->header.references.list + i;
93 struct ref *ref = alloc_ref(e->name);
94 oidcpy(&ref->old_oid, &e->oid);
95 ref->next = result;
96 result = ref;
97 }
98 return result;
99}
100static int fetch_refs_from_bundle(struct transport *transport,
102 int nr_heads, struct ref **to_fetch)
103{
104 struct bundle_transport_data *data = transport->data;
105 return unbundle(&data->header, data->fd,
106 transport->progress ? BUNDLE_VERBOSE : 0);
107}
108static int close_bundle(struct transport *transport)
110{
111 struct bundle_transport_data *data = transport->data;
112 if (data->fd > 0)
113 close(data->fd);
114 free(data);
115 return 0;
116}
117struct git_transport_data {
119 struct git_transport_options options;
120 struct child_process *conn;
121 int fd[2];
122 unsigned got_remote_heads : 1;
123 enum protocol_version version;
124 struct oid_array extra_have;
125 struct oid_array shallow;
126};
127static int set_git_option(struct git_transport_options *opts,
129 const char *name, const char *value)
130{
131 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
132 opts->uploadpack = value;
133 return 0;
134 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
135 opts->receivepack = value;
136 return 0;
137 } else if (!strcmp(name, TRANS_OPT_THIN)) {
138 opts->thin = !!value;
139 return 0;
140 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
141 opts->followtags = !!value;
142 return 0;
143 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
144 opts->keep = !!value;
145 return 0;
146 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
147 opts->update_shallow = !!value;
148 return 0;
149 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
150 if (!value)
151 opts->depth = 0;
152 else {
153 char *end;
154 opts->depth = strtol(value, &end, 0);
155 if (*end)
156 die(_("transport: invalid depth option '%s'"), value);
157 }
158 return 0;
159 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
160 opts->deepen_since = value;
161 return 0;
162 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
163 opts->deepen_not = (const struct string_list *)value;
164 return 0;
165 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
166 opts->deepen_relative = !!value;
167 return 0;
168 }
169 return 1;
170}
171static int connect_setup(struct transport *transport, int for_push)
173{
174 struct git_transport_data *data = transport->data;
175 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
176 if (data->conn)
178 return 0;
179 switch (transport->family) {
181 case TRANSPORT_FAMILY_ALL: break;
182 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
183 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
184 }
185 data->conn = git_connect(data->fd, transport->url,
187 for_push ? data->options.receivepack :
188 data->options.uploadpack,
189 flags);
190 return 0;
192}
193static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
195 const struct argv_array *ref_prefixes)
196{
197 struct git_transport_data *data = transport->data;
198 struct ref *refs = NULL;
199 struct packet_reader reader;
200 connect_setup(transport, for_push);
202 packet_reader_init(&reader, data->fd[0], NULL, 0,
204 PACKET_READ_CHOMP_NEWLINE |
205 PACKET_READ_GENTLE_ON_EOF);
206 data->version = discover_version(&reader);
208 switch (data->version) {
209 case protocol_v2:
210 get_remote_refs(data->fd[1], &reader, &refs, for_push,
211 ref_prefixes);
212 break;
213 case protocol_v1:
214 case protocol_v0:
215 get_remote_heads(&reader, &refs,
216 for_push ? REF_NORMAL : 0,
217 &data->extra_have,
218 &data->shallow);
219 break;
220 case protocol_unknown_version:
221 BUG("unknown protocol version");
222 }
223 data->got_remote_heads = 1;
224 return refs;
226}
227static int fetch_refs_via_pack(struct transport *transport,
229 int nr_heads, struct ref **to_fetch)
230{
231 int ret = 0;
232 struct git_transport_data *data = transport->data;
233 struct ref *refs = NULL;
234 char *dest = xstrdup(transport->url);
235 struct fetch_pack_args args;
236 struct ref *refs_tmp = NULL;
237 memset(&args, 0, sizeof(args));
239 args.uploadpack = data->options.uploadpack;
240 args.keep_pack = data->options.keep;
241 args.lock_pack = 1;
242 args.use_thin_pack = data->options.thin;
243 args.include_tag = data->options.followtags;
244 args.verbose = (transport->verbose > 1);
245 args.quiet = (transport->verbose < 0);
246 args.no_progress = !transport->progress;
247 args.depth = data->options.depth;
248 args.deepen_since = data->options.deepen_since;
249 args.deepen_not = data->options.deepen_not;
250 args.deepen_relative = data->options.deepen_relative;
251 args.check_self_contained_and_connected =
252 data->options.check_self_contained_and_connected;
253 args.cloning = transport->cloning;
254 args.update_shallow = data->options.update_shallow;
255 if (!data->got_remote_heads)
257 refs_tmp = get_refs_via_connect(transport, 0, NULL);
258 switch (data->version) {
260 case protocol_v2:
261 refs = fetch_pack(&args, data->fd, data->conn,
262 refs_tmp ? refs_tmp : transport->remote_refs,
263 dest, to_fetch, nr_heads, &data->shallow,
264 &transport->pack_lockfile, data->version);
265 break;
266 case protocol_v1:
267 case protocol_v0:
268 refs = fetch_pack(&args, data->fd, data->conn,
269 refs_tmp ? refs_tmp : transport->remote_refs,
270 dest, to_fetch, nr_heads, &data->shallow,
271 &transport->pack_lockfile, data->version);
272 break;
273 case protocol_unknown_version:
274 BUG("unknown protocol version");
275 }
276 close(data->fd[0]);
278 close(data->fd[1]);
279 if (finish_connect(data->conn))
280 ret = -1;
281 data->conn = NULL;
282 data->got_remote_heads = 0;
283 data->options.self_contained_and_connected =
284 args.self_contained_and_connected;
285 if (refs == NULL)
287 ret = -1;
288 if (report_unmatched_refs(to_fetch, nr_heads))
289 ret = -1;
290 free_refs(refs_tmp);
292 free_refs(refs);
293 free(dest);
294 return ret;
295}
296static int push_had_errors(struct ref *ref)
298{
299 for (; ref; ref = ref->next) {
300 switch (ref->status) {
301 case REF_STATUS_NONE:
302 case REF_STATUS_UPTODATE:
303 case REF_STATUS_OK:
304 break;
305 default:
306 return 1;
307 }
308 }
309 return 0;
310}
311int transport_refs_pushed(struct ref *ref)
313{
314 for (; ref; ref = ref->next) {
315 switch(ref->status) {
316 case REF_STATUS_NONE:
317 case REF_STATUS_UPTODATE:
318 break;
319 default:
320 return 1;
321 }
322 }
323 return 0;
324}
325void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
327{
328 struct refspec rs;
329 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
331 return;
332 rs.src = ref->name;
334 rs.dst = NULL;
335 if (!remote_find_tracking(remote, &rs)) {
337 if (verbose)
338 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
339 if (ref->deletion) {
340 delete_ref(NULL, rs.dst, NULL, 0);
341 } else
342 update_ref("update by push", rs.dst, &ref->new_oid,
343 NULL, 0, 0);
344 free(rs.dst);
345 }
346}
347static void print_ref_status(char flag, const char *summary,
349 struct ref *to, struct ref *from, const char *msg,
350 int porcelain, int summary_width)
351{
352 if (porcelain) {
353 if (from)
354 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
355 else
356 fprintf(stdout, "%c\t:%s\t", flag, to->name);
357 if (msg)
358 fprintf(stdout, "%s (%s)\n", summary, msg);
359 else
360 fprintf(stdout, "%s\n", summary);
361 } else {
362 fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
363 if (from)
364 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
365 else
366 fputs(prettify_refname(to->name), stderr);
367 if (msg) {
368 fputs(" (", stderr);
369 fputs(msg, stderr);
370 fputc(')', stderr);
371 }
372 fputc('\n', stderr);
373 }
374}
375static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
377{
378 if (ref->deletion)
379 print_ref_status('-', "[deleted]", ref, NULL, NULL,
380 porcelain, summary_width);
381 else if (is_null_oid(&ref->old_oid))
382 print_ref_status('*',
383 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
384 "[new branch]"),
385 ref, ref->peer_ref, NULL, porcelain, summary_width);
386 else {
387 struct strbuf quickref = STRBUF_INIT;
388 char type;
389 const char *msg;
390 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
392 DEFAULT_ABBREV);
393 if (ref->forced_update) {
394 strbuf_addstr(&quickref, "...");
395 type = '+';
396 msg = "forced update";
397 } else {
398 strbuf_addstr(&quickref, "..");
399 type = ' ';
400 msg = NULL;
401 }
402 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
403 DEFAULT_ABBREV);
404 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
406 porcelain, summary_width);
407 strbuf_release(&quickref);
408 }
409}
410static int print_one_push_status(struct ref *ref, const char *dest, int count,
412 int porcelain, int summary_width)
413{
414 if (!count) {
415 char *url = transport_anonymize_url(dest);
416 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
417 free(url);
418 }
419 switch(ref->status) {
421 case REF_STATUS_NONE:
422 print_ref_status('X', "[no match]", ref, NULL, NULL,
423 porcelain, summary_width);
424 break;
425 case REF_STATUS_REJECT_NODELETE:
426 print_ref_status('!', "[rejected]", ref, NULL,
427 "remote does not support deleting refs",
428 porcelain, summary_width);
429 break;
430 case REF_STATUS_UPTODATE:
431 print_ref_status('=', "[up to date]", ref,
432 ref->peer_ref, NULL, porcelain, summary_width);
433 break;
434 case REF_STATUS_REJECT_NONFASTFORWARD:
435 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
436 "non-fast-forward", porcelain, summary_width);
437 break;
438 case REF_STATUS_REJECT_ALREADY_EXISTS:
439 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
440 "already exists", porcelain, summary_width);
441 break;
442 case REF_STATUS_REJECT_FETCH_FIRST:
443 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
444 "fetch first", porcelain, summary_width);
445 break;
446 case REF_STATUS_REJECT_NEEDS_FORCE:
447 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
448 "needs force", porcelain, summary_width);
449 break;
450 case REF_STATUS_REJECT_STALE:
451 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
452 "stale info", porcelain, summary_width);
453 break;
454 case REF_STATUS_REJECT_SHALLOW:
455 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
456 "new shallow roots not allowed",
457 porcelain, summary_width);
458 break;
459 case REF_STATUS_REMOTE_REJECT:
460 print_ref_status('!', "[remote rejected]", ref,
461 ref->deletion ? NULL : ref->peer_ref,
462 ref->remote_status, porcelain, summary_width);
463 break;
464 case REF_STATUS_EXPECTING_REPORT:
465 print_ref_status('!', "[remote failure]", ref,
466 ref->deletion ? NULL : ref->peer_ref,
467 "remote failed to report status",
468 porcelain, summary_width);
469 break;
470 case REF_STATUS_ATOMIC_PUSH_FAILED:
471 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
472 "atomic push failed", porcelain, summary_width);
473 break;
474 case REF_STATUS_OK:
475 print_ok_ref_status(ref, porcelain, summary_width);
476 break;
477 }
478 return 1;
480}
481static int measure_abbrev(const struct object_id *oid, int sofar)
483{
484 char hex[GIT_MAX_HEXSZ + 1];
485 int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
486 return (w < sofar) ? sofar : w;
488}
489int transport_summary_width(const struct ref *refs)
491{
492 int maxw = -1;
493 for (; refs; refs = refs->next) {
495 maxw = measure_abbrev(&refs->old_oid, maxw);
496 maxw = measure_abbrev(&refs->new_oid, maxw);
497 }
498 if (maxw < 0)
499 maxw = FALLBACK_DEFAULT_ABBREV;
500 return (2 * maxw + 3);
501}
502void transport_print_push_status(const char *dest, struct ref *refs,
504 int verbose, int porcelain, unsigned int *reject_reasons)
505{
506 struct ref *ref;
507 int n = 0;
508 char *head;
509 int summary_width = transport_summary_width(refs);
510 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
512 if (verbose) {
514 for (ref = refs; ref; ref = ref->next)
515 if (ref->status == REF_STATUS_UPTODATE)
516 n += print_one_push_status(ref, dest, n,
517 porcelain, summary_width);
518 }
519 for (ref = refs; ref; ref = ref->next)
521 if (ref->status == REF_STATUS_OK)
522 n += print_one_push_status(ref, dest, n,
523 porcelain, summary_width);
524 *reject_reasons = 0;
526 for (ref = refs; ref; ref = ref->next) {
527 if (ref->status != REF_STATUS_NONE &&
528 ref->status != REF_STATUS_UPTODATE &&
529 ref->status != REF_STATUS_OK)
530 n += print_one_push_status(ref, dest, n,
531 porcelain, summary_width);
532 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
533 if (head != NULL && !strcmp(head, ref->name))
534 *reject_reasons |= REJECT_NON_FF_HEAD;
535 else
536 *reject_reasons |= REJECT_NON_FF_OTHER;
537 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
538 *reject_reasons |= REJECT_ALREADY_EXISTS;
539 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
540 *reject_reasons |= REJECT_FETCH_FIRST;
541 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
542 *reject_reasons |= REJECT_NEEDS_FORCE;
543 }
544 }
545 free(head);
546}
547void transport_verify_remote_names(int nr_heads, const char **heads)
549{
550 int i;
551 for (i = 0; i < nr_heads; i++) {
553 const char *local = heads[i];
554 const char *remote = strrchr(heads[i], ':');
555 if (*local == '+')
557 local++;
558 /* A matching refspec is okay. */
560 if (remote == local && remote[1] == '\0')
561 continue;
562 remote = remote ? (remote + 1) : local;
564 if (check_refname_format(remote,
565 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
566 die("remote part of refspec is not a valid name in %s",
567 heads[i]);
568 }
569}
570static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
572{
573 struct git_transport_data *data = transport->data;
574 struct send_pack_args args;
575 int ret = 0;
576 if (!data->got_remote_heads)
578 get_refs_via_connect(transport, 1, NULL);
579 memset(&args, 0, sizeof(args));
581 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
582 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
583 args.use_thin_pack = data->options.thin;
584 args.verbose = (transport->verbose > 0);
585 args.quiet = (transport->verbose < 0);
586 args.progress = transport->progress;
587 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
588 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
589 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
590 args.push_options = transport->push_options;
591 args.url = transport->url;
592 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
594 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
595 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
596 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
597 else
598 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
599 switch (data->version) {
601 case protocol_v2:
602 die("support for protocol v2 not implemented yet");
603 break;
604 case protocol_v1:
605 case protocol_v0:
606 ret = send_pack(&args, data->fd, data->conn, remote_refs,
607 &data->extra_have);
608 break;
609 case protocol_unknown_version:
610 BUG("unknown protocol version");
611 }
612 close(data->fd[1]);
614 close(data->fd[0]);
615 ret |= finish_connect(data->conn);
616 data->conn = NULL;
617 data->got_remote_heads = 0;
618 return ret;
620}
621static int connect_git(struct transport *transport, const char *name,
623 const char *executable, int fd[2])
624{
625 struct git_transport_data *data = transport->data;
626 data->conn = git_connect(data->fd, transport->url,
627 executable, 0);
628 fd[0] = data->fd[0];
629 fd[1] = data->fd[1];
630 return 0;
631}
632static int disconnect_git(struct transport *transport)
634{
635 struct git_transport_data *data = transport->data;
636 if (data->conn) {
637 if (data->got_remote_heads)
638 packet_flush(data->fd[1]);
639 close(data->fd[0]);
640 close(data->fd[1]);
641 finish_connect(data->conn);
642 }
643 free(data);
645 return 0;
646}
647static struct transport_vtable taken_over_vtable = {
649 NULL,
650 get_refs_via_connect,
651 fetch_refs_via_pack,
652 git_transport_push,
653 NULL,
654 disconnect_git
655};
656void transport_take_over(struct transport *transport,
658 struct child_process *child)
659{
660 struct git_transport_data *data;
661 if (!transport->smart_options)
663 die("BUG: taking over transport requires non-NULL "
664 "smart_options field.");
665 data = xcalloc(1, sizeof(*data));
667 data->options = *transport->smart_options;
668 data->conn = child;
669 data->fd[0] = data->conn->out;
670 data->fd[1] = data->conn->in;
671 data->got_remote_heads = 0;
672 transport->data = data;
673 transport->vtable = &taken_over_vtable;
675 transport->smart_options = &(data->options);
676 transport->cannot_reuse = 1;
678}
679static int is_file(const char *url)
681{
682 struct stat buf;
683 if (stat(url, &buf))
684 return 0;
685 return S_ISREG(buf.st_mode);
686}
687static int external_specification_len(const char *url)
689{
690 return strchr(url, ':') - url;
691}
692static const struct string_list *protocol_whitelist(void)
694{
695 static int enabled = -1;
696 static struct string_list allowed = STRING_LIST_INIT_DUP;
697 if (enabled < 0) {
699 const char *v = getenv("GIT_ALLOW_PROTOCOL");
700 if (v) {
701 string_list_split(&allowed, v, ':', -1);
702 string_list_sort(&allowed);
703 enabled = 1;
704 } else {
705 enabled = 0;
706 }
707 }
708 return enabled ? &allowed : NULL;
710}
711enum protocol_allow_config {
713 PROTOCOL_ALLOW_NEVER = 0,
714 PROTOCOL_ALLOW_USER_ONLY,
715 PROTOCOL_ALLOW_ALWAYS
716};
717static enum protocol_allow_config parse_protocol_config(const char *key,
719 const char *value)
720{
721 if (!strcasecmp(value, "always"))
722 return PROTOCOL_ALLOW_ALWAYS;
723 else if (!strcasecmp(value, "never"))
724 return PROTOCOL_ALLOW_NEVER;
725 else if (!strcasecmp(value, "user"))
726 return PROTOCOL_ALLOW_USER_ONLY;
727 die("unknown value for config '%s': %s", key, value);
729}
730static enum protocol_allow_config get_protocol_config(const char *type)
732{
733 char *key = xstrfmt("protocol.%s.allow", type);
734 char *value;
735 /* first check the per-protocol config */
737 if (!git_config_get_string(key, &value)) {
738 enum protocol_allow_config ret =
739 parse_protocol_config(key, value);
740 free(key);
741 free(value);
742 return ret;
743 }
744 free(key);
745 /* if defined, fallback to user-defined default for unknown protocols */
747 if (!git_config_get_string("protocol.allow", &value)) {
748 enum protocol_allow_config ret =
749 parse_protocol_config("protocol.allow", value);
750 free(value);
751 return ret;
752 }
753 /* fallback to built-in defaults */
755 /* known safe */
756 if (!strcmp(type, "http") ||
757 !strcmp(type, "https") ||
758 !strcmp(type, "git") ||
759 !strcmp(type, "ssh") ||
760 !strcmp(type, "file"))
761 return PROTOCOL_ALLOW_ALWAYS;
762 /* known scary; err on the side of caution */
764 if (!strcmp(type, "ext"))
765 return PROTOCOL_ALLOW_NEVER;
766 /* unknown; by default let them be used only directly by the user */
768 return PROTOCOL_ALLOW_USER_ONLY;
769}
770int is_transport_allowed(const char *type, int from_user)
772{
773 const struct string_list *whitelist = protocol_whitelist();
774 if (whitelist)
775 return string_list_has_string(whitelist, type);
776 switch (get_protocol_config(type)) {
778 case PROTOCOL_ALLOW_ALWAYS:
779 return 1;
780 case PROTOCOL_ALLOW_NEVER:
781 return 0;
782 case PROTOCOL_ALLOW_USER_ONLY:
783 if (from_user < 0)
784 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
785 return from_user;
786 }
787 die("BUG: invalid protocol_allow_config type");
789}
790void transport_check_allowed(const char *type)
792{
793 if (!is_transport_allowed(type, -1))
794 die("transport '%s' not allowed", type);
795}
796static struct transport_vtable bundle_vtable = {
798 NULL,
799 get_refs_from_bundle,
800 fetch_refs_from_bundle,
801 NULL,
802 NULL,
803 close_bundle
804};
805static struct transport_vtable builtin_smart_vtable = {
807 NULL,
808 get_refs_via_connect,
809 fetch_refs_via_pack,
810 git_transport_push,
811 connect_git,
812 disconnect_git
813};
814struct transport *transport_get(struct remote *remote, const char *url)
816{
817 const char *helper;
818 struct transport *ret = xcalloc(1, sizeof(*ret));
819 ret->progress = isatty(2);
821 if (!remote)
823 die("No remote provided to transport_get()");
824 ret->got_remote_refs = 0;
826 ret->remote = remote;
827 helper = remote->foreign_vcs;
828 if (!url && remote->url)
830 url = remote->url[0];
831 ret->url = url;
832 /* maybe it is a foreign URL? */
834 if (url) {
835 const char *p = url;
836 while (is_urlschemechar(p == url, *p))
838 p++;
839 if (starts_with(p, "::"))
840 helper = xstrndup(url, p - url);
841 }
842 if (helper) {
844 transport_helper_init(ret, helper);
845 } else if (starts_with(url, "rsync:")) {
846 die("git-over-rsync is no longer supported");
847 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
848 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
849 transport_check_allowed("file");
850 ret->data = data;
851 ret->vtable = &bundle_vtable;
852 ret->smart_options = NULL;
853 } else if (!is_url(url)
854 || starts_with(url, "file://")
855 || starts_with(url, "git://")
856 || starts_with(url, "ssh://")
857 || starts_with(url, "git+ssh://") /* deprecated - do not use */
858 || starts_with(url, "ssh+git://") /* deprecated - do not use */
859 ) {
860 /*
861 * These are builtin smart transports; "allowed" transports
862 * will be checked individually in git_connect.
863 */
864 struct git_transport_data *data = xcalloc(1, sizeof(*data));
865 ret->data = data;
866 ret->vtable = &builtin_smart_vtable;
867 ret->smart_options = &(data->options);
868 data->conn = NULL;
870 data->got_remote_heads = 0;
871 } else {
872 /* Unknown protocol in URL. Pass to external handler. */
873 int len = external_specification_len(url);
874 char *handler = xmemdupz(url, len);
875 transport_helper_init(ret, handler);
876 }
877 if (ret->smart_options) {
879 ret->smart_options->thin = 1;
880 ret->smart_options->uploadpack = "git-upload-pack";
881 if (remote->uploadpack)
882 ret->smart_options->uploadpack = remote->uploadpack;
883 ret->smart_options->receivepack = "git-receive-pack";
884 if (remote->receivepack)
885 ret->smart_options->receivepack = remote->receivepack;
886 }
887 return ret;
889}
890int transport_set_option(struct transport *transport,
892 const char *name, const char *value)
893{
894 int git_reports = 1, protocol_reports = 1;
895 if (transport->smart_options)
897 git_reports = set_git_option(transport->smart_options,
898 name, value);
899 if (transport->vtable->set_option)
901 protocol_reports = transport->vtable->set_option(transport,
902 name, value);
903 /* If either report is 0, report 0 (success). */
905 if (!git_reports || !protocol_reports)
906 return 0;
907 /* If either reports -1 (invalid value), report -1. */
908 if ((git_reports == -1) || (protocol_reports == -1))
909 return -1;
910 /* Otherwise if both report unknown, report unknown. */
911 return 1;
912}
913void transport_set_verbosity(struct transport *transport, int verbosity,
915 int force_progress)
916{
917 if (verbosity >= 1)
918 transport->verbose = verbosity <= 3 ? verbosity : 3;
919 if (verbosity < 0)
920 transport->verbose = -1;
921 /**
923 * Rules used to determine whether to report progress (processing aborts
924 * when a rule is satisfied):
925 *
926 * . Report progress, if force_progress is 1 (ie. --progress).
927 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
928 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
929 * . Report progress if isatty(2) is 1.
930 **/
931 if (force_progress >= 0)
932 transport->progress = !!force_progress;
933 else
934 transport->progress = verbosity >= 0 && isatty(2);
935}
936static void die_with_unpushed_submodules(struct string_list *needs_pushing)
938{
939 int i;
940 fprintf(stderr, _("The following submodule paths contain changes that can\n"
942 "not be found on any remote:\n"));
943 for (i = 0; i < needs_pushing->nr; i++)
944 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
945 fprintf(stderr, _("\nPlease try\n\n"
946 " git push --recurse-submodules=on-demand\n\n"
947 "or cd to the path and use\n\n"
948 " git push\n\n"
949 "to push them to a remote.\n\n"));
950 string_list_clear(needs_pushing, 0);
952 die(_("Aborting."));
954}
955static int run_pre_push_hook(struct transport *transport,
957 struct ref *remote_refs)
958{
959 int ret = 0, x;
960 struct ref *r;
961 struct child_process proc = CHILD_PROCESS_INIT;
962 struct strbuf buf;
963 const char *argv[4];
964 if (!(argv[0] = find_hook("pre-push")))
966 return 0;
967 argv[1] = transport->remote->name;
969 argv[2] = transport->url;
970 argv[3] = NULL;
971 proc.argv = argv;
973 proc.in = -1;
974 if (start_command(&proc)) {
976 finish_command(&proc);
977 return -1;
978 }
979 sigchain_push(SIGPIPE, SIG_IGN);
981 strbuf_init(&buf, 256);
983 for (r = remote_refs; r; r = r->next) {
985 if (!r->peer_ref) continue;
986 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
987 if (r->status == REF_STATUS_REJECT_STALE) continue;
988 if (r->status == REF_STATUS_UPTODATE) continue;
989 strbuf_reset(&buf);
991 strbuf_addf( &buf, "%s %s %s %s\n",
992 r->peer_ref->name, oid_to_hex(&r->new_oid),
993 r->name, oid_to_hex(&r->old_oid));
994 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
996 /* We do not mind if a hook does not read all refs. */
997 if (errno != EPIPE)
998 ret = -1;
999 break;
1000 }
1001 }
1002 strbuf_release(&buf);
1004 x = close(proc.in);
1006 if (!ret)
1007 ret = x;
1008 sigchain_pop(SIGPIPE);
1010 x = finish_command(&proc);
1012 if (!ret)
1013 ret = x;
1014 return ret;
1016}
1017int transport_push(struct transport *transport,
1019 int refspec_nr, const char **refspec, int flags,
1020 unsigned int *reject_reasons)
1021{
1022 *reject_reasons = 0;
1023 transport_verify_remote_names(refspec_nr, refspec);
1024 if (transport->vtable->push_refs) {
1026 struct ref *remote_refs;
1027 struct ref *local_refs = get_local_heads();
1028 int match_flags = MATCH_REFS_NONE;
1029 int verbose = (transport->verbose > 0);
1030 int quiet = (transport->verbose < 0);
1031 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1032 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1033 int push_ret, ret, err;
1034 struct refspec *tmp_rs;
1035 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1036 int i;
1037 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1039 return -1;
1040 tmp_rs = parse_push_refspec(refspec_nr, refspec);
1042 for (i = 0; i < refspec_nr; i++) {
1043 const char *prefix = NULL;
1044 if (tmp_rs[i].dst)
1046 prefix = tmp_rs[i].dst;
1047 else if (tmp_rs[i].src && !tmp_rs[i].exact_sha1)
1048 prefix = tmp_rs[i].src;
1049 if (prefix) {
1051 const char *glob = strchr(prefix, '*');
1052 if (glob)
1053 argv_array_pushf(&ref_prefixes, "%.*s",
1054 (int)(glob - prefix),
1055 prefix);
1056 else
1057 expand_ref_prefix(&ref_prefixes, prefix);
1058 }
1059 }
1060 remote_refs = transport->vtable->get_refs_list(transport, 1,
1062 &ref_prefixes);
1063 argv_array_clear(&ref_prefixes);
1065 free_refspec(refspec_nr, tmp_rs);
1066 if (flags & TRANSPORT_PUSH_ALL)
1068 match_flags |= MATCH_REFS_ALL;
1069 if (flags & TRANSPORT_PUSH_MIRROR)
1070 match_flags |= MATCH_REFS_MIRROR;
1071 if (flags & TRANSPORT_PUSH_PRUNE)
1072 match_flags |= MATCH_REFS_PRUNE;
1073 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1074 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1075 if (match_push_refs(local_refs, &remote_refs,
1077 refspec_nr, refspec, match_flags)) {
1078 return -1;
1079 }
1080 if (transport->smart_options &&
1082 transport->smart_options->cas &&
1083 !is_empty_cas(transport->smart_options->cas))
1084 apply_push_cas(transport->smart_options->cas,
1085 transport->remote, remote_refs);
1086 set_ref_status_for_push(remote_refs,
1088 flags & TRANSPORT_PUSH_MIRROR,
1089 flags & TRANSPORT_PUSH_FORCE);
1090 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1092 if (run_pre_push_hook(transport, remote_refs))
1093 return -1;
1094 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1096 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1097 !is_bare_repository()) {
1098 struct ref *ref = remote_refs;
1099 struct oid_array commits = OID_ARRAY_INIT;
1100 for (; ref; ref = ref->next)
1102 if (!is_null_oid(&ref->new_oid))
1103 oid_array_append(&commits,
1104 &ref->new_oid);
1105 if (!push_unpushed_submodules(&commits,
1107 transport->remote,
1108 refspec, refspec_nr,
1109 transport->push_options,
1110 pretend)) {
1111 oid_array_clear(&commits);
1112 die("Failed to push all needed submodules!");
1113 }
1114 oid_array_clear(&commits);
1115 }
1116 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1118 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1119 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1120 !pretend)) && !is_bare_repository()) {
1121 struct ref *ref = remote_refs;
1122 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1123 struct oid_array commits = OID_ARRAY_INIT;
1124 for (; ref; ref = ref->next)
1126 if (!is_null_oid(&ref->new_oid))
1127 oid_array_append(&commits,
1128 &ref->new_oid);
1129 if (find_unpushed_submodules(&commits, transport->remote->name,
1131 &needs_pushing)) {
1132 oid_array_clear(&commits);
1133 die_with_unpushed_submodules(&needs_pushing);
1134 }
1135 string_list_clear(&needs_pushing, 0);
1136 oid_array_clear(&commits);
1137 }
1138 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1140 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1141 else
1142 push_ret = 0;
1143 err = push_had_errors(remote_refs);
1144 ret = push_ret | err;
1145 if (!quiet || err)
1147 transport_print_push_status(transport->url, remote_refs,
1148 verbose | porcelain, porcelain,
1149 reject_reasons);
1150 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1152 set_upstreams(transport, remote_refs, pretend);
1153 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1155 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1156 struct ref *ref;
1157 for (ref = remote_refs; ref; ref = ref->next)
1158 transport_update_tracking_ref(transport->remote, ref, verbose);
1159 }
1160 if (porcelain && !push_ret)
1162 puts("Done");
1163 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1164 fprintf(stderr, "Everything up-to-date\n");
1165 return ret;
1167 }
1168 return 1;
1169}
1170const struct ref *transport_get_remote_refs(struct transport *transport,
1172 const struct argv_array *ref_prefixes)
1173{
1174 if (!transport->got_remote_refs) {
1175 transport->remote_refs =
1176 transport->vtable->get_refs_list(transport, 0,
1177 ref_prefixes);
1178 transport->got_remote_refs = 1;
1179 }
1180 return transport->remote_refs;
1182}
1183int transport_fetch_refs(struct transport *transport, struct ref *refs)
1185{
1186 int rc;
1187 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1188 struct ref **heads = NULL;
1189 struct ref *rm;
1190 for (rm = refs; rm; rm = rm->next) {
1192 nr_refs++;
1193 if (rm->peer_ref &&
1194 !is_null_oid(&rm->old_oid) &&
1195 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1196 continue;
1197 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1198 heads[nr_heads++] = rm;
1199 }
1200 if (!nr_heads) {
1202 /*
1203 * When deepening of a shallow repository is requested,
1204 * then local and remote refs are likely to still be equal.
1205 * Just feed them all to the fetch method in that case.
1206 * This condition shouldn't be met in a non-deepening fetch
1207 * (see builtin/fetch.c:quickfetch()).
1208 */
1209 ALLOC_ARRAY(heads, nr_refs);
1210 for (rm = refs; rm; rm = rm->next)
1211 heads[nr_heads++] = rm;
1212 }
1213 rc = transport->vtable->fetch(transport, nr_heads, heads);
1215 free(heads);
1217 return rc;
1218}
1219void transport_unlock_pack(struct transport *transport)
1221{
1222 if (transport->pack_lockfile) {
1223 unlink_or_warn(transport->pack_lockfile);
1224 FREE_AND_NULL(transport->pack_lockfile);
1225 }
1226}
1227int transport_connect(struct transport *transport, const char *name,
1229 const char *exec, int fd[2])
1230{
1231 if (transport->vtable->connect)
1232 return transport->vtable->connect(transport, name, exec, fd);
1233 else
1234 die("Operation not supported by protocol");
1235}
1236int transport_disconnect(struct transport *transport)
1238{
1239 int ret = 0;
1240 if (transport->vtable->disconnect)
1241 ret = transport->vtable->disconnect(transport);
1242 free(transport);
1243 return ret;
1244}
1245/*
1247 * Strip username (and password) from a URL and return
1248 * it in a newly allocated string.
1249 */
1250char *transport_anonymize_url(const char *url)
1251{
1252 char *scheme_prefix, *anon_part;
1253 size_t anon_len, prefix_len = 0;
1254 anon_part = strchr(url, '@');
1256 if (url_is_local_not_ssh(url) || !anon_part)
1257 goto literal_copy;
1258 anon_len = strlen(++anon_part);
1260 scheme_prefix = strstr(url, "://");
1261 if (!scheme_prefix) {
1262 if (!strchr(anon_part, ':'))
1263 /* cannot be "me@there:/path/name" */
1264 goto literal_copy;
1265 } else {
1266 const char *cp;
1267 /* make sure scheme is reasonable */
1268 for (cp = url; cp < scheme_prefix; cp++) {
1269 switch (*cp) {
1270 /* RFC 1738 2.1 */
1271 case '+': case '.': case '-':
1272 break; /* ok */
1273 default:
1274 if (isalnum(*cp))
1275 break;
1276 /* it isn't */
1277 goto literal_copy;
1278 }
1279 }
1280 /* @ past the first slash does not count */
1281 cp = strchr(scheme_prefix + 3, '/');
1282 if (cp && cp < anon_part)
1283 goto literal_copy;
1284 prefix_len = scheme_prefix - url + 3;
1285 }
1286 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1287 (int)anon_len, anon_part);
1288literal_copy:
1289 return xstrdup(url);
1290}
1291static void read_alternate_refs(const char *path,
1293 alternate_ref_fn *cb,
1294 void *data)
1295{
1296 struct child_process cmd = CHILD_PROCESS_INIT;
1297 struct strbuf line = STRBUF_INIT;
1298 FILE *fh;
1299 cmd.git_cmd = 1;
1301 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1302 argv_array_push(&cmd.args, "for-each-ref");
1303 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1304 cmd.env = local_repo_env;
1305 cmd.out = -1;
1306 if (start_command(&cmd))
1308 return;
1309 fh = xfdopen(cmd.out, "r");
1311 while (strbuf_getline_lf(&line, fh) != EOF) {
1312 struct object_id oid;
1313 if (get_oid_hex(line.buf, &oid) ||
1315 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1316 warning("invalid line while parsing alternate refs: %s",
1317 line.buf);
1318 break;
1319 }
1320 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1322 }
1323 fclose(fh);
1325 finish_command(&cmd);
1326}
1327struct alternate_refs_data {
1329 alternate_ref_fn *fn;
1330 void *data;
1331};
1332static int refs_from_alternate_cb(struct alternate_object_database *e,
1334 void *data)
1335{
1336 struct strbuf path = STRBUF_INIT;
1337 size_t base_len;
1338 struct alternate_refs_data *cb = data;
1339 if (!strbuf_realpath(&path, e->path, 0))
1341 goto out;
1342 if (!strbuf_strip_suffix(&path, "/objects"))
1343 goto out;
1344 base_len = path.len;
1345 /* Is this a git repository with refs? */
1347 strbuf_addstr(&path, "/refs");
1348 if (!is_directory(path.buf))
1349 goto out;
1350 strbuf_setlen(&path, base_len);
1351 read_alternate_refs(path.buf, cb->fn, cb->data);
1353out:
1355 strbuf_release(&path);
1356 return 0;
1357}
1358void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1360{
1361 struct alternate_refs_data cb;
1362 cb.fn = fn;
1363 cb.data = data;
1364 foreach_alt_odb(refs_from_alternate_cb, &cb);
1365}