1#include "cache.h"
2#include "config.h"
3#include "transport.h"
4#include "run-command.h"
5#include "pkt-line.h"
6#include "fetch-pack.h"
7#include "remote.h"
8#include "connect.h"
9#include "send-pack.h"
10#include "walker.h"
11#include "bundle.h"
12#include "dir.h"
13#include "refs.h"
14#include "refspec.h"
15#include "branch.h"
16#include "url.h"
17#include "submodule.h"
18#include "string-list.h"
19#include "sha1-array.h"
20#include "sigchain.h"
21#include "transport-internal.h"
22#include "protocol.h"
23#include "object-store.h"
24#include "color.h"
25
26static int transport_use_color = -1;
27static char transport_colors[][COLOR_MAXLEN] = {
28 GIT_COLOR_RESET,
29 GIT_COLOR_RED /* REJECTED */
30};
31
32enum color_transport {
33 TRANSPORT_COLOR_RESET = 0,
34 TRANSPORT_COLOR_REJECTED = 1
35};
36
37static int transport_color_config(void)
38{
39 const char *keys[] = {
40 "color.transport.reset",
41 "color.transport.rejected"
42 }, *key = "color.transport";
43 char *value;
44 int i;
45 static int initialized;
46
47 if (initialized)
48 return 0;
49 initialized = 1;
50
51 if (!git_config_get_string(key, &value))
52 transport_use_color = git_config_colorbool(key, value);
53
54 if (!want_color_stderr(transport_use_color))
55 return 0;
56
57 for (i = 0; i < ARRAY_SIZE(keys); i++)
58 if (!git_config_get_string(keys[i], &value)) {
59 if (!value)
60 return config_error_nonbool(keys[i]);
61 if (color_parse(value, transport_colors[i]) < 0)
62 return -1;
63 }
64
65 return 0;
66}
67
68static const char *transport_get_color(enum color_transport ix)
69{
70 if (want_color_stderr(transport_use_color))
71 return transport_colors[ix];
72 return "";
73}
74
75static void set_upstreams(struct transport *transport, struct ref *refs,
76 int pretend)
77{
78 struct ref *ref;
79 for (ref = refs; ref; ref = ref->next) {
80 const char *localname;
81 const char *tmp;
82 const char *remotename;
83 int flag = 0;
84 /*
85 * Check suitability for tracking. Must be successful /
86 * already up-to-date ref create/modify (not delete).
87 */
88 if (ref->status != REF_STATUS_OK &&
89 ref->status != REF_STATUS_UPTODATE)
90 continue;
91 if (!ref->peer_ref)
92 continue;
93 if (is_null_oid(&ref->new_oid))
94 continue;
95
96 /* Follow symbolic refs (mainly for HEAD). */
97 localname = ref->peer_ref->name;
98 remotename = ref->name;
99 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
100 NULL, &flag);
101 if (tmp && flag & REF_ISSYMREF &&
102 starts_with(tmp, "refs/heads/"))
103 localname = tmp;
104
105 /* Both source and destination must be local branches. */
106 if (!localname || !starts_with(localname, "refs/heads/"))
107 continue;
108 if (!remotename || !starts_with(remotename, "refs/heads/"))
109 continue;
110
111 if (!pretend)
112 install_branch_config(BRANCH_CONFIG_VERBOSE,
113 localname + 11, transport->remote->name,
114 remotename);
115 else
116 printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
117 localname + 11, remotename + 11,
118 transport->remote->name);
119 }
120}
121
122struct bundle_transport_data {
123 int fd;
124 struct bundle_header header;
125};
126
127static struct ref *get_refs_from_bundle(struct transport *transport,
128 int for_push,
129 const struct argv_array *ref_prefixes)
130{
131 struct bundle_transport_data *data = transport->data;
132 struct ref *result = NULL;
133 int i;
134
135 if (for_push)
136 return NULL;
137
138 if (data->fd > 0)
139 close(data->fd);
140 data->fd = read_bundle_header(transport->url, &data->header);
141 if (data->fd < 0)
142 die ("Could not read bundle '%s'.", transport->url);
143 for (i = 0; i < data->header.references.nr; i++) {
144 struct ref_list_entry *e = data->header.references.list + i;
145 struct ref *ref = alloc_ref(e->name);
146 oidcpy(&ref->old_oid, &e->oid);
147 ref->next = result;
148 result = ref;
149 }
150 return result;
151}
152
153static int fetch_refs_from_bundle(struct transport *transport,
154 int nr_heads, struct ref **to_fetch,
155 struct ref **fetched_refs)
156{
157 struct bundle_transport_data *data = transport->data;
158 return unbundle(&data->header, data->fd,
159 transport->progress ? BUNDLE_VERBOSE : 0);
160}
161
162static int close_bundle(struct transport *transport)
163{
164 struct bundle_transport_data *data = transport->data;
165 if (data->fd > 0)
166 close(data->fd);
167 free(data);
168 return 0;
169}
170
171struct git_transport_data {
172 struct git_transport_options options;
173 struct child_process *conn;
174 int fd[2];
175 unsigned got_remote_heads : 1;
176 enum protocol_version version;
177 struct oid_array extra_have;
178 struct oid_array shallow;
179};
180
181static int set_git_option(struct git_transport_options *opts,
182 const char *name, const char *value)
183{
184 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
185 opts->uploadpack = value;
186 return 0;
187 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
188 opts->receivepack = value;
189 return 0;
190 } else if (!strcmp(name, TRANS_OPT_THIN)) {
191 opts->thin = !!value;
192 return 0;
193 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
194 opts->followtags = !!value;
195 return 0;
196 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
197 opts->keep = !!value;
198 return 0;
199 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
200 opts->update_shallow = !!value;
201 return 0;
202 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
203 if (!value)
204 opts->depth = 0;
205 else {
206 char *end;
207 opts->depth = strtol(value, &end, 0);
208 if (*end)
209 die(_("transport: invalid depth option '%s'"), value);
210 }
211 return 0;
212 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
213 opts->deepen_since = value;
214 return 0;
215 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
216 opts->deepen_not = (const struct string_list *)value;
217 return 0;
218 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
219 opts->deepen_relative = !!value;
220 return 0;
221 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
222 opts->from_promisor = !!value;
223 return 0;
224 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
225 opts->no_dependents = !!value;
226 return 0;
227 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
228 parse_list_objects_filter(&opts->filter_options, value);
229 return 0;
230 }
231 return 1;
232}
233
234static int connect_setup(struct transport *transport, int for_push)
235{
236 struct git_transport_data *data = transport->data;
237 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
238
239 if (data->conn)
240 return 0;
241
242 switch (transport->family) {
243 case TRANSPORT_FAMILY_ALL: break;
244 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
245 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
246 }
247
248 data->conn = git_connect(data->fd, transport->url,
249 for_push ? data->options.receivepack :
250 data->options.uploadpack,
251 flags);
252
253 return 0;
254}
255
256static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
257 const struct argv_array *ref_prefixes)
258{
259 struct git_transport_data *data = transport->data;
260 struct ref *refs = NULL;
261 struct packet_reader reader;
262
263 connect_setup(transport, for_push);
264
265 packet_reader_init(&reader, data->fd[0], NULL, 0,
266 PACKET_READ_CHOMP_NEWLINE |
267 PACKET_READ_GENTLE_ON_EOF);
268
269 data->version = discover_version(&reader);
270 switch (data->version) {
271 case protocol_v2:
272 get_remote_refs(data->fd[1], &reader, &refs, for_push,
273 ref_prefixes, transport->server_options);
274 break;
275 case protocol_v1:
276 case protocol_v0:
277 get_remote_heads(&reader, &refs,
278 for_push ? REF_NORMAL : 0,
279 &data->extra_have,
280 &data->shallow);
281 break;
282 case protocol_unknown_version:
283 BUG("unknown protocol version");
284 }
285 data->got_remote_heads = 1;
286
287 return refs;
288}
289
290static int fetch_refs_via_pack(struct transport *transport,
291 int nr_heads, struct ref **to_fetch,
292 struct ref **fetched_refs)
293{
294 int ret = 0;
295 struct git_transport_data *data = transport->data;
296 struct ref *refs = NULL;
297 char *dest = xstrdup(transport->url);
298 struct fetch_pack_args args;
299 struct ref *refs_tmp = NULL;
300
301 memset(&args, 0, sizeof(args));
302 args.uploadpack = data->options.uploadpack;
303 args.keep_pack = data->options.keep;
304 args.lock_pack = 1;
305 args.use_thin_pack = data->options.thin;
306 args.include_tag = data->options.followtags;
307 args.verbose = (transport->verbose > 1);
308 args.quiet = (transport->verbose < 0);
309 args.no_progress = !transport->progress;
310 args.depth = data->options.depth;
311 args.deepen_since = data->options.deepen_since;
312 args.deepen_not = data->options.deepen_not;
313 args.deepen_relative = data->options.deepen_relative;
314 args.check_self_contained_and_connected =
315 data->options.check_self_contained_and_connected;
316 args.cloning = transport->cloning;
317 args.update_shallow = data->options.update_shallow;
318 args.from_promisor = data->options.from_promisor;
319 args.no_dependents = data->options.no_dependents;
320 args.filter_options = data->options.filter_options;
321 args.stateless_rpc = transport->stateless_rpc;
322 args.server_options = transport->server_options;
323
324 if (!data->got_remote_heads)
325 refs_tmp = get_refs_via_connect(transport, 0, NULL);
326
327 switch (data->version) {
328 case protocol_v2:
329 refs = fetch_pack(&args, data->fd, data->conn,
330 refs_tmp ? refs_tmp : transport->remote_refs,
331 dest, to_fetch, nr_heads, &data->shallow,
332 &transport->pack_lockfile, data->version);
333 break;
334 case protocol_v1:
335 case protocol_v0:
336 refs = fetch_pack(&args, data->fd, data->conn,
337 refs_tmp ? refs_tmp : transport->remote_refs,
338 dest, to_fetch, nr_heads, &data->shallow,
339 &transport->pack_lockfile, data->version);
340 break;
341 case protocol_unknown_version:
342 BUG("unknown protocol version");
343 }
344
345 close(data->fd[0]);
346 close(data->fd[1]);
347 if (finish_connect(data->conn))
348 ret = -1;
349 data->conn = NULL;
350 data->got_remote_heads = 0;
351 data->options.self_contained_and_connected =
352 args.self_contained_and_connected;
353
354 if (refs == NULL)
355 ret = -1;
356 if (report_unmatched_refs(to_fetch, nr_heads))
357 ret = -1;
358
359 if (fetched_refs)
360 *fetched_refs = refs;
361 else
362 free_refs(refs);
363
364 free_refs(refs_tmp);
365 free(dest);
366 return ret;
367}
368
369static int push_had_errors(struct ref *ref)
370{
371 for (; ref; ref = ref->next) {
372 switch (ref->status) {
373 case REF_STATUS_NONE:
374 case REF_STATUS_UPTODATE:
375 case REF_STATUS_OK:
376 break;
377 default:
378 return 1;
379 }
380 }
381 return 0;
382}
383
384int transport_refs_pushed(struct ref *ref)
385{
386 for (; ref; ref = ref->next) {
387 switch(ref->status) {
388 case REF_STATUS_NONE:
389 case REF_STATUS_UPTODATE:
390 break;
391 default:
392 return 1;
393 }
394 }
395 return 0;
396}
397
398void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
399{
400 struct refspec_item rs;
401
402 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
403 return;
404
405 rs.src = ref->name;
406 rs.dst = NULL;
407
408 if (!remote_find_tracking(remote, &rs)) {
409 if (verbose)
410 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
411 if (ref->deletion) {
412 delete_ref(NULL, rs.dst, NULL, 0);
413 } else
414 update_ref("update by push", rs.dst, &ref->new_oid,
415 NULL, 0, 0);
416 free(rs.dst);
417 }
418}
419
420static void print_ref_status(char flag, const char *summary,
421 struct ref *to, struct ref *from, const char *msg,
422 int porcelain, int summary_width)
423{
424 if (porcelain) {
425 if (from)
426 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
427 else
428 fprintf(stdout, "%c\t:%s\t", flag, to->name);
429 if (msg)
430 fprintf(stdout, "%s (%s)\n", summary, msg);
431 else
432 fprintf(stdout, "%s\n", summary);
433 } else {
434 const char *red = "", *reset = "";
435 if (push_had_errors(to)) {
436 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
437 reset = transport_get_color(TRANSPORT_COLOR_RESET);
438 }
439 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
440 summary, reset);
441 if (from)
442 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
443 else
444 fputs(prettify_refname(to->name), stderr);
445 if (msg) {
446 fputs(" (", stderr);
447 fputs(msg, stderr);
448 fputc(')', stderr);
449 }
450 fputc('\n', stderr);
451 }
452}
453
454static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
455{
456 if (ref->deletion)
457 print_ref_status('-', "[deleted]", ref, NULL, NULL,
458 porcelain, summary_width);
459 else if (is_null_oid(&ref->old_oid))
460 print_ref_status('*',
461 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
462 "[new branch]"),
463 ref, ref->peer_ref, NULL, porcelain, summary_width);
464 else {
465 struct strbuf quickref = STRBUF_INIT;
466 char type;
467 const char *msg;
468
469 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
470 DEFAULT_ABBREV);
471 if (ref->forced_update) {
472 strbuf_addstr(&quickref, "...");
473 type = '+';
474 msg = "forced update";
475 } else {
476 strbuf_addstr(&quickref, "..");
477 type = ' ';
478 msg = NULL;
479 }
480 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
481 DEFAULT_ABBREV);
482
483 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
484 porcelain, summary_width);
485 strbuf_release(&quickref);
486 }
487}
488
489static int print_one_push_status(struct ref *ref, const char *dest, int count,
490 int porcelain, int summary_width)
491{
492 if (!count) {
493 char *url = transport_anonymize_url(dest);
494 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
495 free(url);
496 }
497
498 switch(ref->status) {
499 case REF_STATUS_NONE:
500 print_ref_status('X', "[no match]", ref, NULL, NULL,
501 porcelain, summary_width);
502 break;
503 case REF_STATUS_REJECT_NODELETE:
504 print_ref_status('!', "[rejected]", ref, NULL,
505 "remote does not support deleting refs",
506 porcelain, summary_width);
507 break;
508 case REF_STATUS_UPTODATE:
509 print_ref_status('=', "[up to date]", ref,
510 ref->peer_ref, NULL, porcelain, summary_width);
511 break;
512 case REF_STATUS_REJECT_NONFASTFORWARD:
513 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
514 "non-fast-forward", porcelain, summary_width);
515 break;
516 case REF_STATUS_REJECT_ALREADY_EXISTS:
517 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
518 "already exists", porcelain, summary_width);
519 break;
520 case REF_STATUS_REJECT_FETCH_FIRST:
521 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
522 "fetch first", porcelain, summary_width);
523 break;
524 case REF_STATUS_REJECT_NEEDS_FORCE:
525 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
526 "needs force", porcelain, summary_width);
527 break;
528 case REF_STATUS_REJECT_STALE:
529 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
530 "stale info", porcelain, summary_width);
531 break;
532 case REF_STATUS_REJECT_SHALLOW:
533 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
534 "new shallow roots not allowed",
535 porcelain, summary_width);
536 break;
537 case REF_STATUS_REMOTE_REJECT:
538 print_ref_status('!', "[remote rejected]", ref,
539 ref->deletion ? NULL : ref->peer_ref,
540 ref->remote_status, porcelain, summary_width);
541 break;
542 case REF_STATUS_EXPECTING_REPORT:
543 print_ref_status('!', "[remote failure]", ref,
544 ref->deletion ? NULL : ref->peer_ref,
545 "remote failed to report status",
546 porcelain, summary_width);
547 break;
548 case REF_STATUS_ATOMIC_PUSH_FAILED:
549 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
550 "atomic push failed", porcelain, summary_width);
551 break;
552 case REF_STATUS_OK:
553 print_ok_ref_status(ref, porcelain, summary_width);
554 break;
555 }
556
557 return 1;
558}
559
560static int measure_abbrev(const struct object_id *oid, int sofar)
561{
562 char hex[GIT_MAX_HEXSZ + 1];
563 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
564
565 return (w < sofar) ? sofar : w;
566}
567
568int transport_summary_width(const struct ref *refs)
569{
570 int maxw = -1;
571
572 for (; refs; refs = refs->next) {
573 maxw = measure_abbrev(&refs->old_oid, maxw);
574 maxw = measure_abbrev(&refs->new_oid, maxw);
575 }
576 if (maxw < 0)
577 maxw = FALLBACK_DEFAULT_ABBREV;
578 return (2 * maxw + 3);
579}
580
581void transport_print_push_status(const char *dest, struct ref *refs,
582 int verbose, int porcelain, unsigned int *reject_reasons)
583{
584 struct ref *ref;
585 int n = 0;
586 char *head;
587 int summary_width = transport_summary_width(refs);
588
589 if (transport_color_config() < 0)
590 warning(_("could not parse transport.color.* config"));
591
592 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
593
594 if (verbose) {
595 for (ref = refs; ref; ref = ref->next)
596 if (ref->status == REF_STATUS_UPTODATE)
597 n += print_one_push_status(ref, dest, n,
598 porcelain, summary_width);
599 }
600
601 for (ref = refs; ref; ref = ref->next)
602 if (ref->status == REF_STATUS_OK)
603 n += print_one_push_status(ref, dest, n,
604 porcelain, summary_width);
605
606 *reject_reasons = 0;
607 for (ref = refs; ref; ref = ref->next) {
608 if (ref->status != REF_STATUS_NONE &&
609 ref->status != REF_STATUS_UPTODATE &&
610 ref->status != REF_STATUS_OK)
611 n += print_one_push_status(ref, dest, n,
612 porcelain, summary_width);
613 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
614 if (head != NULL && !strcmp(head, ref->name))
615 *reject_reasons |= REJECT_NON_FF_HEAD;
616 else
617 *reject_reasons |= REJECT_NON_FF_OTHER;
618 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
619 *reject_reasons |= REJECT_ALREADY_EXISTS;
620 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
621 *reject_reasons |= REJECT_FETCH_FIRST;
622 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
623 *reject_reasons |= REJECT_NEEDS_FORCE;
624 }
625 }
626 free(head);
627}
628
629static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
630{
631 struct git_transport_data *data = transport->data;
632 struct send_pack_args args;
633 int ret = 0;
634
635 if (transport_color_config() < 0)
636 return -1;
637
638 if (!data->got_remote_heads)
639 get_refs_via_connect(transport, 1, NULL);
640
641 memset(&args, 0, sizeof(args));
642 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
643 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
644 args.use_thin_pack = data->options.thin;
645 args.verbose = (transport->verbose > 0);
646 args.quiet = (transport->verbose < 0);
647 args.progress = transport->progress;
648 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
649 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
650 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
651 args.push_options = transport->push_options;
652 args.url = transport->url;
653
654 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
655 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
656 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
657 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
658 else
659 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
660
661 switch (data->version) {
662 case protocol_v2:
663 die("support for protocol v2 not implemented yet");
664 break;
665 case protocol_v1:
666 case protocol_v0:
667 ret = send_pack(&args, data->fd, data->conn, remote_refs,
668 &data->extra_have);
669 break;
670 case protocol_unknown_version:
671 BUG("unknown protocol version");
672 }
673
674 close(data->fd[1]);
675 close(data->fd[0]);
676 ret |= finish_connect(data->conn);
677 data->conn = NULL;
678 data->got_remote_heads = 0;
679
680 return ret;
681}
682
683static int connect_git(struct transport *transport, const char *name,
684 const char *executable, int fd[2])
685{
686 struct git_transport_data *data = transport->data;
687 data->conn = git_connect(data->fd, transport->url,
688 executable, 0);
689 fd[0] = data->fd[0];
690 fd[1] = data->fd[1];
691 return 0;
692}
693
694static int disconnect_git(struct transport *transport)
695{
696 struct git_transport_data *data = transport->data;
697 if (data->conn) {
698 if (data->got_remote_heads)
699 packet_flush(data->fd[1]);
700 close(data->fd[0]);
701 close(data->fd[1]);
702 finish_connect(data->conn);
703 }
704
705 free(data);
706 return 0;
707}
708
709static struct transport_vtable taken_over_vtable = {
710 NULL,
711 get_refs_via_connect,
712 fetch_refs_via_pack,
713 git_transport_push,
714 NULL,
715 disconnect_git
716};
717
718void transport_take_over(struct transport *transport,
719 struct child_process *child)
720{
721 struct git_transport_data *data;
722
723 if (!transport->smart_options)
724 BUG("taking over transport requires non-NULL "
725 "smart_options field.");
726
727 data = xcalloc(1, sizeof(*data));
728 data->options = *transport->smart_options;
729 data->conn = child;
730 data->fd[0] = data->conn->out;
731 data->fd[1] = data->conn->in;
732 data->got_remote_heads = 0;
733 transport->data = data;
734
735 transport->vtable = &taken_over_vtable;
736 transport->smart_options = &(data->options);
737
738 transport->cannot_reuse = 1;
739}
740
741static int is_file(const char *url)
742{
743 struct stat buf;
744 if (stat(url, &buf))
745 return 0;
746 return S_ISREG(buf.st_mode);
747}
748
749static int external_specification_len(const char *url)
750{
751 return strchr(url, ':') - url;
752}
753
754static const struct string_list *protocol_whitelist(void)
755{
756 static int enabled = -1;
757 static struct string_list allowed = STRING_LIST_INIT_DUP;
758
759 if (enabled < 0) {
760 const char *v = getenv("GIT_ALLOW_PROTOCOL");
761 if (v) {
762 string_list_split(&allowed, v, ':', -1);
763 string_list_sort(&allowed);
764 enabled = 1;
765 } else {
766 enabled = 0;
767 }
768 }
769
770 return enabled ? &allowed : NULL;
771}
772
773enum protocol_allow_config {
774 PROTOCOL_ALLOW_NEVER = 0,
775 PROTOCOL_ALLOW_USER_ONLY,
776 PROTOCOL_ALLOW_ALWAYS
777};
778
779static enum protocol_allow_config parse_protocol_config(const char *key,
780 const char *value)
781{
782 if (!strcasecmp(value, "always"))
783 return PROTOCOL_ALLOW_ALWAYS;
784 else if (!strcasecmp(value, "never"))
785 return PROTOCOL_ALLOW_NEVER;
786 else if (!strcasecmp(value, "user"))
787 return PROTOCOL_ALLOW_USER_ONLY;
788
789 die("unknown value for config '%s': %s", key, value);
790}
791
792static enum protocol_allow_config get_protocol_config(const char *type)
793{
794 char *key = xstrfmt("protocol.%s.allow", type);
795 char *value;
796
797 /* first check the per-protocol config */
798 if (!git_config_get_string(key, &value)) {
799 enum protocol_allow_config ret =
800 parse_protocol_config(key, value);
801 free(key);
802 free(value);
803 return ret;
804 }
805 free(key);
806
807 /* if defined, fallback to user-defined default for unknown protocols */
808 if (!git_config_get_string("protocol.allow", &value)) {
809 enum protocol_allow_config ret =
810 parse_protocol_config("protocol.allow", value);
811 free(value);
812 return ret;
813 }
814
815 /* fallback to built-in defaults */
816 /* known safe */
817 if (!strcmp(type, "http") ||
818 !strcmp(type, "https") ||
819 !strcmp(type, "git") ||
820 !strcmp(type, "ssh") ||
821 !strcmp(type, "file"))
822 return PROTOCOL_ALLOW_ALWAYS;
823
824 /* known scary; err on the side of caution */
825 if (!strcmp(type, "ext"))
826 return PROTOCOL_ALLOW_NEVER;
827
828 /* unknown; by default let them be used only directly by the user */
829 return PROTOCOL_ALLOW_USER_ONLY;
830}
831
832int is_transport_allowed(const char *type, int from_user)
833{
834 const struct string_list *whitelist = protocol_whitelist();
835 if (whitelist)
836 return string_list_has_string(whitelist, type);
837
838 switch (get_protocol_config(type)) {
839 case PROTOCOL_ALLOW_ALWAYS:
840 return 1;
841 case PROTOCOL_ALLOW_NEVER:
842 return 0;
843 case PROTOCOL_ALLOW_USER_ONLY:
844 if (from_user < 0)
845 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
846 return from_user;
847 }
848
849 BUG("invalid protocol_allow_config type");
850}
851
852void transport_check_allowed(const char *type)
853{
854 if (!is_transport_allowed(type, -1))
855 die("transport '%s' not allowed", type);
856}
857
858static struct transport_vtable bundle_vtable = {
859 NULL,
860 get_refs_from_bundle,
861 fetch_refs_from_bundle,
862 NULL,
863 NULL,
864 close_bundle
865};
866
867static struct transport_vtable builtin_smart_vtable = {
868 NULL,
869 get_refs_via_connect,
870 fetch_refs_via_pack,
871 git_transport_push,
872 connect_git,
873 disconnect_git
874};
875
876struct transport *transport_get(struct remote *remote, const char *url)
877{
878 const char *helper;
879 struct transport *ret = xcalloc(1, sizeof(*ret));
880
881 ret->progress = isatty(2);
882
883 if (!remote)
884 die("No remote provided to transport_get()");
885
886 ret->got_remote_refs = 0;
887 ret->remote = remote;
888 helper = remote->foreign_vcs;
889
890 if (!url && remote->url)
891 url = remote->url[0];
892 ret->url = url;
893
894 /* maybe it is a foreign URL? */
895 if (url) {
896 const char *p = url;
897
898 while (is_urlschemechar(p == url, *p))
899 p++;
900 if (starts_with(p, "::"))
901 helper = xstrndup(url, p - url);
902 }
903
904 if (helper) {
905 transport_helper_init(ret, helper);
906 } else if (starts_with(url, "rsync:")) {
907 die("git-over-rsync is no longer supported");
908 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
909 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
910 transport_check_allowed("file");
911 ret->data = data;
912 ret->vtable = &bundle_vtable;
913 ret->smart_options = NULL;
914 } else if (!is_url(url)
915 || starts_with(url, "file://")
916 || starts_with(url, "git://")
917 || starts_with(url, "ssh://")
918 || starts_with(url, "git+ssh://") /* deprecated - do not use */
919 || starts_with(url, "ssh+git://") /* deprecated - do not use */
920 ) {
921 /*
922 * These are builtin smart transports; "allowed" transports
923 * will be checked individually in git_connect.
924 */
925 struct git_transport_data *data = xcalloc(1, sizeof(*data));
926 ret->data = data;
927 ret->vtable = &builtin_smart_vtable;
928 ret->smart_options = &(data->options);
929
930 data->conn = NULL;
931 data->got_remote_heads = 0;
932 } else {
933 /* Unknown protocol in URL. Pass to external handler. */
934 int len = external_specification_len(url);
935 char *handler = xmemdupz(url, len);
936 transport_helper_init(ret, handler);
937 }
938
939 if (ret->smart_options) {
940 ret->smart_options->thin = 1;
941 ret->smart_options->uploadpack = "git-upload-pack";
942 if (remote->uploadpack)
943 ret->smart_options->uploadpack = remote->uploadpack;
944 ret->smart_options->receivepack = "git-receive-pack";
945 if (remote->receivepack)
946 ret->smart_options->receivepack = remote->receivepack;
947 }
948
949 return ret;
950}
951
952int transport_set_option(struct transport *transport,
953 const char *name, const char *value)
954{
955 int git_reports = 1, protocol_reports = 1;
956
957 if (transport->smart_options)
958 git_reports = set_git_option(transport->smart_options,
959 name, value);
960
961 if (transport->vtable->set_option)
962 protocol_reports = transport->vtable->set_option(transport,
963 name, value);
964
965 /* If either report is 0, report 0 (success). */
966 if (!git_reports || !protocol_reports)
967 return 0;
968 /* If either reports -1 (invalid value), report -1. */
969 if ((git_reports == -1) || (protocol_reports == -1))
970 return -1;
971 /* Otherwise if both report unknown, report unknown. */
972 return 1;
973}
974
975void transport_set_verbosity(struct transport *transport, int verbosity,
976 int force_progress)
977{
978 if (verbosity >= 1)
979 transport->verbose = verbosity <= 3 ? verbosity : 3;
980 if (verbosity < 0)
981 transport->verbose = -1;
982
983 /**
984 * Rules used to determine whether to report progress (processing aborts
985 * when a rule is satisfied):
986 *
987 * . Report progress, if force_progress is 1 (ie. --progress).
988 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
989 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
990 * . Report progress if isatty(2) is 1.
991 **/
992 if (force_progress >= 0)
993 transport->progress = !!force_progress;
994 else
995 transport->progress = verbosity >= 0 && isatty(2);
996}
997
998static void die_with_unpushed_submodules(struct string_list *needs_pushing)
999{
1000 int i;
1001
1002 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1003 "not be found on any remote:\n"));
1004 for (i = 0; i < needs_pushing->nr; i++)
1005 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1006 fprintf(stderr, _("\nPlease try\n\n"
1007 " git push --recurse-submodules=on-demand\n\n"
1008 "or cd to the path and use\n\n"
1009 " git push\n\n"
1010 "to push them to a remote.\n\n"));
1011
1012 string_list_clear(needs_pushing, 0);
1013
1014 die(_("Aborting."));
1015}
1016
1017static int run_pre_push_hook(struct transport *transport,
1018 struct ref *remote_refs)
1019{
1020 int ret = 0, x;
1021 struct ref *r;
1022 struct child_process proc = CHILD_PROCESS_INIT;
1023 struct strbuf buf;
1024 const char *argv[4];
1025
1026 if (!(argv[0] = find_hook("pre-push")))
1027 return 0;
1028
1029 argv[1] = transport->remote->name;
1030 argv[2] = transport->url;
1031 argv[3] = NULL;
1032
1033 proc.argv = argv;
1034 proc.in = -1;
1035
1036 if (start_command(&proc)) {
1037 finish_command(&proc);
1038 return -1;
1039 }
1040
1041 sigchain_push(SIGPIPE, SIG_IGN);
1042
1043 strbuf_init(&buf, 256);
1044
1045 for (r = remote_refs; r; r = r->next) {
1046 if (!r->peer_ref) continue;
1047 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1048 if (r->status == REF_STATUS_REJECT_STALE) continue;
1049 if (r->status == REF_STATUS_UPTODATE) continue;
1050
1051 strbuf_reset(&buf);
1052 strbuf_addf( &buf, "%s %s %s %s\n",
1053 r->peer_ref->name, oid_to_hex(&r->new_oid),
1054 r->name, oid_to_hex(&r->old_oid));
1055
1056 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1057 /* We do not mind if a hook does not read all refs. */
1058 if (errno != EPIPE)
1059 ret = -1;
1060 break;
1061 }
1062 }
1063
1064 strbuf_release(&buf);
1065
1066 x = close(proc.in);
1067 if (!ret)
1068 ret = x;
1069
1070 sigchain_pop(SIGPIPE);
1071
1072 x = finish_command(&proc);
1073 if (!ret)
1074 ret = x;
1075
1076 return ret;
1077}
1078
1079int transport_push(struct transport *transport,
1080 struct refspec *rs, int flags,
1081 unsigned int *reject_reasons)
1082{
1083 *reject_reasons = 0;
1084
1085 if (transport_color_config() < 0)
1086 return -1;
1087
1088 if (transport->vtable->push_refs) {
1089 struct ref *remote_refs;
1090 struct ref *local_refs = get_local_heads();
1091 int match_flags = MATCH_REFS_NONE;
1092 int verbose = (transport->verbose > 0);
1093 int quiet = (transport->verbose < 0);
1094 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1095 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1096 int push_ret, ret, err;
1097 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1098
1099 if (check_push_refs(local_refs, rs) < 0)
1100 return -1;
1101
1102 refspec_ref_prefixes(rs, &ref_prefixes);
1103
1104 remote_refs = transport->vtable->get_refs_list(transport, 1,
1105 &ref_prefixes);
1106
1107 argv_array_clear(&ref_prefixes);
1108
1109 if (flags & TRANSPORT_PUSH_ALL)
1110 match_flags |= MATCH_REFS_ALL;
1111 if (flags & TRANSPORT_PUSH_MIRROR)
1112 match_flags |= MATCH_REFS_MIRROR;
1113 if (flags & TRANSPORT_PUSH_PRUNE)
1114 match_flags |= MATCH_REFS_PRUNE;
1115 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1116 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1117
1118 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1119 return -1;
1120
1121 if (transport->smart_options &&
1122 transport->smart_options->cas &&
1123 !is_empty_cas(transport->smart_options->cas))
1124 apply_push_cas(transport->smart_options->cas,
1125 transport->remote, remote_refs);
1126
1127 set_ref_status_for_push(remote_refs,
1128 flags & TRANSPORT_PUSH_MIRROR,
1129 flags & TRANSPORT_PUSH_FORCE);
1130
1131 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1132 if (run_pre_push_hook(transport, remote_refs))
1133 return -1;
1134
1135 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1136 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1137 !is_bare_repository()) {
1138 struct ref *ref = remote_refs;
1139 struct oid_array commits = OID_ARRAY_INIT;
1140
1141 for (; ref; ref = ref->next)
1142 if (!is_null_oid(&ref->new_oid))
1143 oid_array_append(&commits,
1144 &ref->new_oid);
1145
1146 if (!push_unpushed_submodules(&commits,
1147 transport->remote,
1148 rs,
1149 transport->push_options,
1150 pretend)) {
1151 oid_array_clear(&commits);
1152 die("Failed to push all needed submodules!");
1153 }
1154 oid_array_clear(&commits);
1155 }
1156
1157 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1158 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1159 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1160 !pretend)) && !is_bare_repository()) {
1161 struct ref *ref = remote_refs;
1162 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1163 struct oid_array commits = OID_ARRAY_INIT;
1164
1165 for (; ref; ref = ref->next)
1166 if (!is_null_oid(&ref->new_oid))
1167 oid_array_append(&commits,
1168 &ref->new_oid);
1169
1170 if (find_unpushed_submodules(&commits, transport->remote->name,
1171 &needs_pushing)) {
1172 oid_array_clear(&commits);
1173 die_with_unpushed_submodules(&needs_pushing);
1174 }
1175 string_list_clear(&needs_pushing, 0);
1176 oid_array_clear(&commits);
1177 }
1178
1179 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1180 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1181 else
1182 push_ret = 0;
1183 err = push_had_errors(remote_refs);
1184 ret = push_ret | err;
1185
1186 if (!quiet || err)
1187 transport_print_push_status(transport->url, remote_refs,
1188 verbose | porcelain, porcelain,
1189 reject_reasons);
1190
1191 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1192 set_upstreams(transport, remote_refs, pretend);
1193
1194 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1195 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1196 struct ref *ref;
1197 for (ref = remote_refs; ref; ref = ref->next)
1198 transport_update_tracking_ref(transport->remote, ref, verbose);
1199 }
1200
1201 if (porcelain && !push_ret)
1202 puts("Done");
1203 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1204 fprintf(stderr, "Everything up-to-date\n");
1205
1206 return ret;
1207 }
1208 return 1;
1209}
1210
1211const struct ref *transport_get_remote_refs(struct transport *transport,
1212 const struct argv_array *ref_prefixes)
1213{
1214 if (!transport->got_remote_refs) {
1215 transport->remote_refs =
1216 transport->vtable->get_refs_list(transport, 0,
1217 ref_prefixes);
1218 transport->got_remote_refs = 1;
1219 }
1220
1221 return transport->remote_refs;
1222}
1223
1224int transport_fetch_refs(struct transport *transport, struct ref *refs,
1225 struct ref **fetched_refs)
1226{
1227 int rc;
1228 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1229 struct ref **heads = NULL;
1230 struct ref *nop_head = NULL, **nop_tail = &nop_head;
1231 struct ref *rm;
1232
1233 for (rm = refs; rm; rm = rm->next) {
1234 nr_refs++;
1235 if (rm->peer_ref &&
1236 !is_null_oid(&rm->old_oid) &&
1237 !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid)) {
1238 /*
1239 * These need to be reported as fetched, but we don't
1240 * actually need to fetch them.
1241 */
1242 if (fetched_refs) {
1243 struct ref *nop_ref = copy_ref(rm);
1244 *nop_tail = nop_ref;
1245 nop_tail = &nop_ref->next;
1246 }
1247 continue;
1248 }
1249 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1250 heads[nr_heads++] = rm;
1251 }
1252
1253 if (!nr_heads) {
1254 /*
1255 * When deepening of a shallow repository is requested,
1256 * then local and remote refs are likely to still be equal.
1257 * Just feed them all to the fetch method in that case.
1258 * This condition shouldn't be met in a non-deepening fetch
1259 * (see builtin/fetch.c:quickfetch()).
1260 */
1261 ALLOC_ARRAY(heads, nr_refs);
1262 for (rm = refs; rm; rm = rm->next)
1263 heads[nr_heads++] = rm;
1264 }
1265
1266 rc = transport->vtable->fetch(transport, nr_heads, heads, fetched_refs);
1267 if (fetched_refs && nop_head) {
1268 *nop_tail = *fetched_refs;
1269 *fetched_refs = nop_head;
1270 }
1271
1272 free(heads);
1273 return rc;
1274}
1275
1276void transport_unlock_pack(struct transport *transport)
1277{
1278 if (transport->pack_lockfile) {
1279 unlink_or_warn(transport->pack_lockfile);
1280 FREE_AND_NULL(transport->pack_lockfile);
1281 }
1282}
1283
1284int transport_connect(struct transport *transport, const char *name,
1285 const char *exec, int fd[2])
1286{
1287 if (transport->vtable->connect)
1288 return transport->vtable->connect(transport, name, exec, fd);
1289 else
1290 die("Operation not supported by protocol");
1291}
1292
1293int transport_disconnect(struct transport *transport)
1294{
1295 int ret = 0;
1296 if (transport->vtable->disconnect)
1297 ret = transport->vtable->disconnect(transport);
1298 free(transport);
1299 return ret;
1300}
1301
1302/*
1303 * Strip username (and password) from a URL and return
1304 * it in a newly allocated string.
1305 */
1306char *transport_anonymize_url(const char *url)
1307{
1308 char *scheme_prefix, *anon_part;
1309 size_t anon_len, prefix_len = 0;
1310
1311 anon_part = strchr(url, '@');
1312 if (url_is_local_not_ssh(url) || !anon_part)
1313 goto literal_copy;
1314
1315 anon_len = strlen(++anon_part);
1316 scheme_prefix = strstr(url, "://");
1317 if (!scheme_prefix) {
1318 if (!strchr(anon_part, ':'))
1319 /* cannot be "me@there:/path/name" */
1320 goto literal_copy;
1321 } else {
1322 const char *cp;
1323 /* make sure scheme is reasonable */
1324 for (cp = url; cp < scheme_prefix; cp++) {
1325 switch (*cp) {
1326 /* RFC 1738 2.1 */
1327 case '+': case '.': case '-':
1328 break; /* ok */
1329 default:
1330 if (isalnum(*cp))
1331 break;
1332 /* it isn't */
1333 goto literal_copy;
1334 }
1335 }
1336 /* @ past the first slash does not count */
1337 cp = strchr(scheme_prefix + 3, '/');
1338 if (cp && cp < anon_part)
1339 goto literal_copy;
1340 prefix_len = scheme_prefix - url + 3;
1341 }
1342 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1343 (int)anon_len, anon_part);
1344literal_copy:
1345 return xstrdup(url);
1346}
1347
1348static void read_alternate_refs(const char *path,
1349 alternate_ref_fn *cb,
1350 void *data)
1351{
1352 struct child_process cmd = CHILD_PROCESS_INIT;
1353 struct strbuf line = STRBUF_INIT;
1354 FILE *fh;
1355
1356 cmd.git_cmd = 1;
1357 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1358 argv_array_push(&cmd.args, "for-each-ref");
1359 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1360 cmd.env = local_repo_env;
1361 cmd.out = -1;
1362
1363 if (start_command(&cmd))
1364 return;
1365
1366 fh = xfdopen(cmd.out, "r");
1367 while (strbuf_getline_lf(&line, fh) != EOF) {
1368 struct object_id oid;
1369
1370 if (get_oid_hex(line.buf, &oid) ||
1371 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1372 warning("invalid line while parsing alternate refs: %s",
1373 line.buf);
1374 break;
1375 }
1376
1377 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1378 }
1379
1380 fclose(fh);
1381 finish_command(&cmd);
1382}
1383
1384struct alternate_refs_data {
1385 alternate_ref_fn *fn;
1386 void *data;
1387};
1388
1389static int refs_from_alternate_cb(struct alternate_object_database *e,
1390 void *data)
1391{
1392 struct strbuf path = STRBUF_INIT;
1393 size_t base_len;
1394 struct alternate_refs_data *cb = data;
1395
1396 if (!strbuf_realpath(&path, e->path, 0))
1397 goto out;
1398 if (!strbuf_strip_suffix(&path, "/objects"))
1399 goto out;
1400 base_len = path.len;
1401
1402 /* Is this a git repository with refs? */
1403 strbuf_addstr(&path, "/refs");
1404 if (!is_directory(path.buf))
1405 goto out;
1406 strbuf_setlen(&path, base_len);
1407
1408 read_alternate_refs(path.buf, cb->fn, cb->data);
1409
1410out:
1411 strbuf_release(&path);
1412 return 0;
1413}
1414
1415void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1416{
1417 struct alternate_refs_data cb;
1418 cb.fn = fn;
1419 cb.data = data;
1420 foreach_alt_odb(refs_from_alternate_cb, &cb);
1421}