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subtree: use commits before rejoins for splits
[git.git] / transport.c
blob1c76d64aba9fac7d62dfc8e95ab2b32f45dd95a5
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
26 static int transport_use_color = -1;
27 static char transport_colors[][COLOR_MAXLEN] = {
28 GIT_COLOR_RESET,
29 GIT_COLOR_RED /* REJECTED */
30 };
31
32 enum color_transport {
33 TRANSPORT_COLOR_RESET = 0,
34 TRANSPORT_COLOR_REJECTED = 1
35 };
36
37 static 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
68 static 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
75 static 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
122 struct bundle_transport_data {
123 int fd;
124 struct bundle_header header;
125 };
126
127 static 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
153 static int fetch_refs_from_bundle(struct transport *transport,
154 int nr_heads, struct ref **to_fetch)
155 {
156 struct bundle_transport_data *data = transport->data;
157 return unbundle(&data->header, data->fd,
158 transport->progress ? BUNDLE_VERBOSE : 0);
159 }
160
161 static int close_bundle(struct transport *transport)
162 {
163 struct bundle_transport_data *data = transport->data;
164 if (data->fd > 0)
165 close(data->fd);
166 free(data);
167 return 0;
168 }
169
170 struct git_transport_data {
171 struct git_transport_options options;
172 struct child_process *conn;
173 int fd[2];
174 unsigned got_remote_heads : 1;
175 enum protocol_version version;
176 struct oid_array extra_have;
177 struct oid_array shallow;
178 };
179
180 static int set_git_option(struct git_transport_options *opts,
181 const char *name, const char *value)
182 {
183 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
184 opts->uploadpack = value;
185 return 0;
186 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
187 opts->receivepack = value;
188 return 0;
189 } else if (!strcmp(name, TRANS_OPT_THIN)) {
190 opts->thin = !!value;
191 return 0;
192 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
193 opts->followtags = !!value;
194 return 0;
195 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
196 opts->keep = !!value;
197 return 0;
198 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
199 opts->update_shallow = !!value;
200 return 0;
201 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
202 if (!value)
203 opts->depth = 0;
204 else {
205 char *end;
206 opts->depth = strtol(value, &end, 0);
207 if (*end)
208 die(_("transport: invalid depth option '%s'"), value);
209 }
210 return 0;
211 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
212 opts->deepen_since = value;
213 return 0;
214 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
215 opts->deepen_not = (const struct string_list *)value;
216 return 0;
217 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
218 opts->deepen_relative = !!value;
219 return 0;
220 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
221 opts->from_promisor = !!value;
222 return 0;
223 } else if (!strcmp(name, TRANS_OPT_NO_DEPENDENTS)) {
224 opts->no_dependents = !!value;
225 return 0;
226 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
227 parse_list_objects_filter(&opts->filter_options, value);
228 return 0;
229 }
230 return 1;
231 }
232
233 static int connect_setup(struct transport *transport, int for_push)
234 {
235 struct git_transport_data *data = transport->data;
236 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
237
238 if (data->conn)
239 return 0;
240
241 switch (transport->family) {
242 case TRANSPORT_FAMILY_ALL: break;
243 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
244 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
245 }
246
247 data->conn = git_connect(data->fd, transport->url,
248 for_push ? data->options.receivepack :
249 data->options.uploadpack,
250 flags);
251
252 return 0;
253 }
254
255 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
256 const struct argv_array *ref_prefixes)
257 {
258 struct git_transport_data *data = transport->data;
259 struct ref *refs = NULL;
260 struct packet_reader reader;
261
262 connect_setup(transport, for_push);
263
264 packet_reader_init(&reader, data->fd[0], NULL, 0,
265 PACKET_READ_CHOMP_NEWLINE |
266 PACKET_READ_GENTLE_ON_EOF);
267
268 data->version = discover_version(&reader);
269 switch (data->version) {
270 case protocol_v2:
271 get_remote_refs(data->fd[1], &reader, &refs, for_push,
272 ref_prefixes, transport->server_options);
273 break;
274 case protocol_v1:
275 case protocol_v0:
276 get_remote_heads(&reader, &refs,
277 for_push ? REF_NORMAL : 0,
278 &data->extra_have,
279 &data->shallow);
280 break;
281 case protocol_unknown_version:
282 BUG("unknown protocol version");
283 }
284 data->got_remote_heads = 1;
285
286 return refs;
287 }
288
289 static int fetch_refs_via_pack(struct transport *transport,
290 int nr_heads, struct ref **to_fetch)
291 {
292 int ret = 0;
293 struct git_transport_data *data = transport->data;
294 struct ref *refs = NULL;
295 char *dest = xstrdup(transport->url);
296 struct fetch_pack_args args;
297 struct ref *refs_tmp = NULL;
298
299 memset(&args, 0, sizeof(args));
300 args.uploadpack = data->options.uploadpack;
301 args.keep_pack = data->options.keep;
302 args.lock_pack = 1;
303 args.use_thin_pack = data->options.thin;
304 args.include_tag = data->options.followtags;
305 args.verbose = (transport->verbose > 1);
306 args.quiet = (transport->verbose < 0);
307 args.no_progress = !transport->progress;
308 args.depth = data->options.depth;
309 args.deepen_since = data->options.deepen_since;
310 args.deepen_not = data->options.deepen_not;
311 args.deepen_relative = data->options.deepen_relative;
312 args.check_self_contained_and_connected =
313 data->options.check_self_contained_and_connected;
314 args.cloning = transport->cloning;
315 args.update_shallow = data->options.update_shallow;
316 args.from_promisor = data->options.from_promisor;
317 args.no_dependents = data->options.no_dependents;
318 args.filter_options = data->options.filter_options;
319 args.stateless_rpc = transport->stateless_rpc;
320 args.server_options = transport->server_options;
321 args.negotiation_tips = data->options.negotiation_tips;
322
323 if (!data->got_remote_heads)
324 refs_tmp = get_refs_via_connect(transport, 0, NULL);
325
326 switch (data->version) {
327 case protocol_v2:
328 refs = fetch_pack(&args, data->fd, data->conn,
329 refs_tmp ? refs_tmp : transport->remote_refs,
330 dest, to_fetch, nr_heads, &data->shallow,
331 &transport->pack_lockfile, data->version);
332 break;
333 case protocol_v1:
334 case protocol_v0:
335 refs = fetch_pack(&args, data->fd, data->conn,
336 refs_tmp ? refs_tmp : transport->remote_refs,
337 dest, to_fetch, nr_heads, &data->shallow,
338 &transport->pack_lockfile, data->version);
339 break;
340 case protocol_unknown_version:
341 BUG("unknown protocol version");
342 }
343
344 close(data->fd[0]);
345 close(data->fd[1]);
346 if (finish_connect(data->conn))
347 ret = -1;
348 data->conn = NULL;
349 data->got_remote_heads = 0;
350 data->options.self_contained_and_connected =
351 args.self_contained_and_connected;
352 data->options.connectivity_checked = args.connectivity_checked;
353
354 if (refs == NULL)
355 ret = -1;
356 if (report_unmatched_refs(to_fetch, nr_heads))
357 ret = -1;
358
359 free_refs(refs_tmp);
360 free_refs(refs);
361 free(dest);
362 return ret;
363 }
364
365 static int push_had_errors(struct ref *ref)
366 {
367 for (; ref; ref = ref->next) {
368 switch (ref->status) {
369 case REF_STATUS_NONE:
370 case REF_STATUS_UPTODATE:
371 case REF_STATUS_OK:
372 break;
373 default:
374 return 1;
375 }
376 }
377 return 0;
378 }
379
380 int transport_refs_pushed(struct ref *ref)
381 {
382 for (; ref; ref = ref->next) {
383 switch(ref->status) {
384 case REF_STATUS_NONE:
385 case REF_STATUS_UPTODATE:
386 break;
387 default:
388 return 1;
389 }
390 }
391 return 0;
392 }
393
394 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
395 {
396 struct refspec_item rs;
397
398 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
399 return;
400
401 rs.src = ref->name;
402 rs.dst = NULL;
403
404 if (!remote_find_tracking(remote, &rs)) {
405 if (verbose)
406 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
407 if (ref->deletion) {
408 delete_ref(NULL, rs.dst, NULL, 0);
409 } else
410 update_ref("update by push", rs.dst, &ref->new_oid,
411 NULL, 0, 0);
412 free(rs.dst);
413 }
414 }
415
416 static void print_ref_status(char flag, const char *summary,
417 struct ref *to, struct ref *from, const char *msg,
418 int porcelain, int summary_width)
419 {
420 if (porcelain) {
421 if (from)
422 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
423 else
424 fprintf(stdout, "%c\t:%s\t", flag, to->name);
425 if (msg)
426 fprintf(stdout, "%s (%s)\n", summary, msg);
427 else
428 fprintf(stdout, "%s\n", summary);
429 } else {
430 const char *red = "", *reset = "";
431 if (push_had_errors(to)) {
432 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
433 reset = transport_get_color(TRANSPORT_COLOR_RESET);
434 }
435 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
436 summary, reset);
437 if (from)
438 fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
439 else
440 fputs(prettify_refname(to->name), stderr);
441 if (msg) {
442 fputs(" (", stderr);
443 fputs(msg, stderr);
444 fputc(')', stderr);
445 }
446 fputc('\n', stderr);
447 }
448 }
449
450 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
451 {
452 if (ref->deletion)
453 print_ref_status('-', "[deleted]", ref, NULL, NULL,
454 porcelain, summary_width);
455 else if (is_null_oid(&ref->old_oid))
456 print_ref_status('*',
457 (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
458 "[new branch]"),
459 ref, ref->peer_ref, NULL, porcelain, summary_width);
460 else {
461 struct strbuf quickref = STRBUF_INIT;
462 char type;
463 const char *msg;
464
465 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
466 DEFAULT_ABBREV);
467 if (ref->forced_update) {
468 strbuf_addstr(&quickref, "...");
469 type = '+';
470 msg = "forced update";
471 } else {
472 strbuf_addstr(&quickref, "..");
473 type = ' ';
474 msg = NULL;
475 }
476 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
477 DEFAULT_ABBREV);
478
479 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
480 porcelain, summary_width);
481 strbuf_release(&quickref);
482 }
483 }
484
485 static int print_one_push_status(struct ref *ref, const char *dest, int count,
486 int porcelain, int summary_width)
487 {
488 if (!count) {
489 char *url = transport_anonymize_url(dest);
490 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
491 free(url);
492 }
493
494 switch(ref->status) {
495 case REF_STATUS_NONE:
496 print_ref_status('X', "[no match]", ref, NULL, NULL,
497 porcelain, summary_width);
498 break;
499 case REF_STATUS_REJECT_NODELETE:
500 print_ref_status('!', "[rejected]", ref, NULL,
501 "remote does not support deleting refs",
502 porcelain, summary_width);
503 break;
504 case REF_STATUS_UPTODATE:
505 print_ref_status('=', "[up to date]", ref,
506 ref->peer_ref, NULL, porcelain, summary_width);
507 break;
508 case REF_STATUS_REJECT_NONFASTFORWARD:
509 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
510 "non-fast-forward", porcelain, summary_width);
511 break;
512 case REF_STATUS_REJECT_ALREADY_EXISTS:
513 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
514 "already exists", porcelain, summary_width);
515 break;
516 case REF_STATUS_REJECT_FETCH_FIRST:
517 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
518 "fetch first", porcelain, summary_width);
519 break;
520 case REF_STATUS_REJECT_NEEDS_FORCE:
521 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
522 "needs force", porcelain, summary_width);
523 break;
524 case REF_STATUS_REJECT_STALE:
525 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
526 "stale info", porcelain, summary_width);
527 break;
528 case REF_STATUS_REJECT_SHALLOW:
529 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
530 "new shallow roots not allowed",
531 porcelain, summary_width);
532 break;
533 case REF_STATUS_REMOTE_REJECT:
534 print_ref_status('!', "[remote rejected]", ref,
535 ref->deletion ? NULL : ref->peer_ref,
536 ref->remote_status, porcelain, summary_width);
537 break;
538 case REF_STATUS_EXPECTING_REPORT:
539 print_ref_status('!', "[remote failure]", ref,
540 ref->deletion ? NULL : ref->peer_ref,
541 "remote failed to report status",
542 porcelain, summary_width);
543 break;
544 case REF_STATUS_ATOMIC_PUSH_FAILED:
545 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
546 "atomic push failed", porcelain, summary_width);
547 break;
548 case REF_STATUS_OK:
549 print_ok_ref_status(ref, porcelain, summary_width);
550 break;
551 }
552
553 return 1;
554 }
555
556 static int measure_abbrev(const struct object_id *oid, int sofar)
557 {
558 char hex[GIT_MAX_HEXSZ + 1];
559 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
560
561 return (w < sofar) ? sofar : w;
562 }
563
564 int transport_summary_width(const struct ref *refs)
565 {
566 int maxw = -1;
567
568 for (; refs; refs = refs->next) {
569 maxw = measure_abbrev(&refs->old_oid, maxw);
570 maxw = measure_abbrev(&refs->new_oid, maxw);
571 }
572 if (maxw < 0)
573 maxw = FALLBACK_DEFAULT_ABBREV;
574 return (2 * maxw + 3);
575 }
576
577 void transport_print_push_status(const char *dest, struct ref *refs,
578 int verbose, int porcelain, unsigned int *reject_reasons)
579 {
580 struct ref *ref;
581 int n = 0;
582 char *head;
583 int summary_width = transport_summary_width(refs);
584
585 if (transport_color_config() < 0)
586 warning(_("could not parse transport.color.* config"));
587
588 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
589
590 if (verbose) {
591 for (ref = refs; ref; ref = ref->next)
592 if (ref->status == REF_STATUS_UPTODATE)
593 n += print_one_push_status(ref, dest, n,
594 porcelain, summary_width);
595 }
596
597 for (ref = refs; ref; ref = ref->next)
598 if (ref->status == REF_STATUS_OK)
599 n += print_one_push_status(ref, dest, n,
600 porcelain, summary_width);
601
602 *reject_reasons = 0;
603 for (ref = refs; ref; ref = ref->next) {
604 if (ref->status != REF_STATUS_NONE &&
605 ref->status != REF_STATUS_UPTODATE &&
606 ref->status != REF_STATUS_OK)
607 n += print_one_push_status(ref, dest, n,
608 porcelain, summary_width);
609 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
610 if (head != NULL && !strcmp(head, ref->name))
611 *reject_reasons |= REJECT_NON_FF_HEAD;
612 else
613 *reject_reasons |= REJECT_NON_FF_OTHER;
614 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
615 *reject_reasons |= REJECT_ALREADY_EXISTS;
616 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
617 *reject_reasons |= REJECT_FETCH_FIRST;
618 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
619 *reject_reasons |= REJECT_NEEDS_FORCE;
620 }
621 }
622 free(head);
623 }
624
625 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
626 {
627 struct git_transport_data *data = transport->data;
628 struct send_pack_args args;
629 int ret = 0;
630
631 if (transport_color_config() < 0)
632 return -1;
633
634 if (!data->got_remote_heads)
635 get_refs_via_connect(transport, 1, NULL);
636
637 memset(&args, 0, sizeof(args));
638 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
639 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
640 args.use_thin_pack = data->options.thin;
641 args.verbose = (transport->verbose > 0);
642 args.quiet = (transport->verbose < 0);
643 args.progress = transport->progress;
644 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
645 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
646 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
647 args.push_options = transport->push_options;
648 args.url = transport->url;
649
650 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
651 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
652 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
653 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
654 else
655 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
656
657 switch (data->version) {
658 case protocol_v2:
659 die(_("support for protocol v2 not implemented yet"));
660 break;
661 case protocol_v1:
662 case protocol_v0:
663 ret = send_pack(&args, data->fd, data->conn, remote_refs,
664 &data->extra_have);
665 break;
666 case protocol_unknown_version:
667 BUG("unknown protocol version");
668 }
669
670 close(data->fd[1]);
671 close(data->fd[0]);
672 ret |= finish_connect(data->conn);
673 data->conn = NULL;
674 data->got_remote_heads = 0;
675
676 return ret;
677 }
678
679 static int connect_git(struct transport *transport, const char *name,
680 const char *executable, int fd[2])
681 {
682 struct git_transport_data *data = transport->data;
683 data->conn = git_connect(data->fd, transport->url,
684 executable, 0);
685 fd[0] = data->fd[0];
686 fd[1] = data->fd[1];
687 return 0;
688 }
689
690 static int disconnect_git(struct transport *transport)
691 {
692 struct git_transport_data *data = transport->data;
693 if (data->conn) {
694 if (data->got_remote_heads)
695 packet_flush(data->fd[1]);
696 close(data->fd[0]);
697 close(data->fd[1]);
698 finish_connect(data->conn);
699 }
700
701 free(data);
702 return 0;
703 }
704
705 static struct transport_vtable taken_over_vtable = {
706 NULL,
707 get_refs_via_connect,
708 fetch_refs_via_pack,
709 git_transport_push,
710 NULL,
711 disconnect_git
712 };
713
714 void transport_take_over(struct transport *transport,
715 struct child_process *child)
716 {
717 struct git_transport_data *data;
718
719 if (!transport->smart_options)
720 BUG("taking over transport requires non-NULL "
721 "smart_options field.");
722
723 data = xcalloc(1, sizeof(*data));
724 data->options = *transport->smart_options;
725 data->conn = child;
726 data->fd[0] = data->conn->out;
727 data->fd[1] = data->conn->in;
728 data->got_remote_heads = 0;
729 transport->data = data;
730
731 transport->vtable = &taken_over_vtable;
732 transport->smart_options = &(data->options);
733
734 transport->cannot_reuse = 1;
735 }
736
737 static int is_file(const char *url)
738 {
739 struct stat buf;
740 if (stat(url, &buf))
741 return 0;
742 return S_ISREG(buf.st_mode);
743 }
744
745 static int external_specification_len(const char *url)
746 {
747 return strchr(url, ':') - url;
748 }
749
750 static const struct string_list *protocol_whitelist(void)
751 {
752 static int enabled = -1;
753 static struct string_list allowed = STRING_LIST_INIT_DUP;
754
755 if (enabled < 0) {
756 const char *v = getenv("GIT_ALLOW_PROTOCOL");
757 if (v) {
758 string_list_split(&allowed, v, ':', -1);
759 string_list_sort(&allowed);
760 enabled = 1;
761 } else {
762 enabled = 0;
763 }
764 }
765
766 return enabled ? &allowed : NULL;
767 }
768
769 enum protocol_allow_config {
770 PROTOCOL_ALLOW_NEVER = 0,
771 PROTOCOL_ALLOW_USER_ONLY,
772 PROTOCOL_ALLOW_ALWAYS
773 };
774
775 static enum protocol_allow_config parse_protocol_config(const char *key,
776 const char *value)
777 {
778 if (!strcasecmp(value, "always"))
779 return PROTOCOL_ALLOW_ALWAYS;
780 else if (!strcasecmp(value, "never"))
781 return PROTOCOL_ALLOW_NEVER;
782 else if (!strcasecmp(value, "user"))
783 return PROTOCOL_ALLOW_USER_ONLY;
784
785 die(_("unknown value for config '%s': %s"), key, value);
786 }
787
788 static enum protocol_allow_config get_protocol_config(const char *type)
789 {
790 char *key = xstrfmt("protocol.%s.allow", type);
791 char *value;
792
793 /* first check the per-protocol config */
794 if (!git_config_get_string(key, &value)) {
795 enum protocol_allow_config ret =
796 parse_protocol_config(key, value);
797 free(key);
798 free(value);
799 return ret;
800 }
801 free(key);
802
803 /* if defined, fallback to user-defined default for unknown protocols */
804 if (!git_config_get_string("protocol.allow", &value)) {
805 enum protocol_allow_config ret =
806 parse_protocol_config("protocol.allow", value);
807 free(value);
808 return ret;
809 }
810
811 /* fallback to built-in defaults */
812 /* known safe */
813 if (!strcmp(type, "http") ||
814 !strcmp(type, "https") ||
815 !strcmp(type, "git") ||
816 !strcmp(type, "ssh") ||
817 !strcmp(type, "file"))
818 return PROTOCOL_ALLOW_ALWAYS;
819
820 /* known scary; err on the side of caution */
821 if (!strcmp(type, "ext"))
822 return PROTOCOL_ALLOW_NEVER;
823
824 /* unknown; by default let them be used only directly by the user */
825 return PROTOCOL_ALLOW_USER_ONLY;
826 }
827
828 int is_transport_allowed(const char *type, int from_user)
829 {
830 const struct string_list *whitelist = protocol_whitelist();
831 if (whitelist)
832 return string_list_has_string(whitelist, type);
833
834 switch (get_protocol_config(type)) {
835 case PROTOCOL_ALLOW_ALWAYS:
836 return 1;
837 case PROTOCOL_ALLOW_NEVER:
838 return 0;
839 case PROTOCOL_ALLOW_USER_ONLY:
840 if (from_user < 0)
841 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
842 return from_user;
843 }
844
845 BUG("invalid protocol_allow_config type");
846 }
847
848 void transport_check_allowed(const char *type)
849 {
850 if (!is_transport_allowed(type, -1))
851 die(_("transport '%s' not allowed"), type);
852 }
853
854 static struct transport_vtable bundle_vtable = {
855 NULL,
856 get_refs_from_bundle,
857 fetch_refs_from_bundle,
858 NULL,
859 NULL,
860 close_bundle
861 };
862
863 static struct transport_vtable builtin_smart_vtable = {
864 NULL,
865 get_refs_via_connect,
866 fetch_refs_via_pack,
867 git_transport_push,
868 connect_git,
869 disconnect_git
870 };
871
872 struct transport *transport_get(struct remote *remote, const char *url)
873 {
874 const char *helper;
875 struct transport *ret = xcalloc(1, sizeof(*ret));
876
877 ret->progress = isatty(2);
878
879 if (!remote)
880 BUG("No remote provided to transport_get()");
881
882 ret->got_remote_refs = 0;
883 ret->remote = remote;
884 helper = remote->foreign_vcs;
885
886 if (!url && remote->url)
887 url = remote->url[0];
888 ret->url = url;
889
890 /* maybe it is a foreign URL? */
891 if (url) {
892 const char *p = url;
893
894 while (is_urlschemechar(p == url, *p))
895 p++;
896 if (starts_with(p, "::"))
897 helper = xstrndup(url, p - url);
898 }
899
900 if (helper) {
901 transport_helper_init(ret, helper);
902 } else if (starts_with(url, "rsync:")) {
903 die(_("git-over-rsync is no longer supported"));
904 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
905 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
906 transport_check_allowed("file");
907 ret->data = data;
908 ret->vtable = &bundle_vtable;
909 ret->smart_options = NULL;
910 } else if (!is_url(url)
911 || starts_with(url, "file://")
912 || starts_with(url, "git://")
913 || starts_with(url, "ssh://")
914 || starts_with(url, "git+ssh://") /* deprecated - do not use */
915 || starts_with(url, "ssh+git://") /* deprecated - do not use */
916 ) {
917 /*
918 * These are builtin smart transports; "allowed" transports
919 * will be checked individually in git_connect.
920 */
921 struct git_transport_data *data = xcalloc(1, sizeof(*data));
922 ret->data = data;
923 ret->vtable = &builtin_smart_vtable;
924 ret->smart_options = &(data->options);
925
926 data->conn = NULL;
927 data->got_remote_heads = 0;
928 } else {
929 /* Unknown protocol in URL. Pass to external handler. */
930 int len = external_specification_len(url);
931 char *handler = xmemdupz(url, len);
932 transport_helper_init(ret, handler);
933 }
934
935 if (ret->smart_options) {
936 ret->smart_options->thin = 1;
937 ret->smart_options->uploadpack = "git-upload-pack";
938 if (remote->uploadpack)
939 ret->smart_options->uploadpack = remote->uploadpack;
940 ret->smart_options->receivepack = "git-receive-pack";
941 if (remote->receivepack)
942 ret->smart_options->receivepack = remote->receivepack;
943 }
944
945 return ret;
946 }
947
948 int transport_set_option(struct transport *transport,
949 const char *name, const char *value)
950 {
951 int git_reports = 1, protocol_reports = 1;
952
953 if (transport->smart_options)
954 git_reports = set_git_option(transport->smart_options,
955 name, value);
956
957 if (transport->vtable->set_option)
958 protocol_reports = transport->vtable->set_option(transport,
959 name, value);
960
961 /* If either report is 0, report 0 (success). */
962 if (!git_reports || !protocol_reports)
963 return 0;
964 /* If either reports -1 (invalid value), report -1. */
965 if ((git_reports == -1) || (protocol_reports == -1))
966 return -1;
967 /* Otherwise if both report unknown, report unknown. */
968 return 1;
969 }
970
971 void transport_set_verbosity(struct transport *transport, int verbosity,
972 int force_progress)
973 {
974 if (verbosity >= 1)
975 transport->verbose = verbosity <= 3 ? verbosity : 3;
976 if (verbosity < 0)
977 transport->verbose = -1;
978
979 /**
980 * Rules used to determine whether to report progress (processing aborts
981 * when a rule is satisfied):
982 *
983 * . Report progress, if force_progress is 1 (ie. --progress).
984 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
985 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
986 * . Report progress if isatty(2) is 1.
987 **/
988 if (force_progress >= 0)
989 transport->progress = !!force_progress;
990 else
991 transport->progress = verbosity >= 0 && isatty(2);
992 }
993
994 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
995 {
996 int i;
997
998 fprintf(stderr, _("The following submodule paths contain changes that can\n"
999 "not be found on any remote:\n"));
1000 for (i = 0; i < needs_pushing->nr; i++)
1001 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1002 fprintf(stderr, _("\nPlease try\n\n"
1003 " git push --recurse-submodules=on-demand\n\n"
1004 "or cd to the path and use\n\n"
1005 " git push\n\n"
1006 "to push them to a remote.\n\n"));
1007
1008 string_list_clear(needs_pushing, 0);
1009
1010 die(_("Aborting."));
1011 }
1012
1013 static int run_pre_push_hook(struct transport *transport,
1014 struct ref *remote_refs)
1015 {
1016 int ret = 0, x;
1017 struct ref *r;
1018 struct child_process proc = CHILD_PROCESS_INIT;
1019 struct strbuf buf;
1020 const char *argv[4];
1021
1022 if (!(argv[0] = find_hook("pre-push")))
1023 return 0;
1024
1025 argv[1] = transport->remote->name;
1026 argv[2] = transport->url;
1027 argv[3] = NULL;
1028
1029 proc.argv = argv;
1030 proc.in = -1;
1031
1032 if (start_command(&proc)) {
1033 finish_command(&proc);
1034 return -1;
1035 }
1036
1037 sigchain_push(SIGPIPE, SIG_IGN);
1038
1039 strbuf_init(&buf, 256);
1040
1041 for (r = remote_refs; r; r = r->next) {
1042 if (!r->peer_ref) continue;
1043 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1044 if (r->status == REF_STATUS_REJECT_STALE) continue;
1045 if (r->status == REF_STATUS_UPTODATE) continue;
1046
1047 strbuf_reset(&buf);
1048 strbuf_addf( &buf, "%s %s %s %s\n",
1049 r->peer_ref->name, oid_to_hex(&r->new_oid),
1050 r->name, oid_to_hex(&r->old_oid));
1051
1052 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1053 /* We do not mind if a hook does not read all refs. */
1054 if (errno != EPIPE)
1055 ret = -1;
1056 break;
1057 }
1058 }
1059
1060 strbuf_release(&buf);
1061
1062 x = close(proc.in);
1063 if (!ret)
1064 ret = x;
1065
1066 sigchain_pop(SIGPIPE);
1067
1068 x = finish_command(&proc);
1069 if (!ret)
1070 ret = x;
1071
1072 return ret;
1073 }
1074
1075 int transport_push(struct transport *transport,
1076 struct refspec *rs, int flags,
1077 unsigned int *reject_reasons)
1078 {
1079 *reject_reasons = 0;
1080
1081 if (transport_color_config() < 0)
1082 return -1;
1083
1084 if (transport->vtable->push_refs) {
1085 struct ref *remote_refs;
1086 struct ref *local_refs = get_local_heads();
1087 int match_flags = MATCH_REFS_NONE;
1088 int verbose = (transport->verbose > 0);
1089 int quiet = (transport->verbose < 0);
1090 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1091 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1092 int push_ret, ret, err;
1093 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1094
1095 if (check_push_refs(local_refs, rs) < 0)
1096 return -1;
1097
1098 refspec_ref_prefixes(rs, &ref_prefixes);
1099
1100 remote_refs = transport->vtable->get_refs_list(transport, 1,
1101 &ref_prefixes);
1102
1103 argv_array_clear(&ref_prefixes);
1104
1105 if (flags & TRANSPORT_PUSH_ALL)
1106 match_flags |= MATCH_REFS_ALL;
1107 if (flags & TRANSPORT_PUSH_MIRROR)
1108 match_flags |= MATCH_REFS_MIRROR;
1109 if (flags & TRANSPORT_PUSH_PRUNE)
1110 match_flags |= MATCH_REFS_PRUNE;
1111 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1112 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1113
1114 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1115 return -1;
1116
1117 if (transport->smart_options &&
1118 transport->smart_options->cas &&
1119 !is_empty_cas(transport->smart_options->cas))
1120 apply_push_cas(transport->smart_options->cas,
1121 transport->remote, remote_refs);
1122
1123 set_ref_status_for_push(remote_refs,
1124 flags & TRANSPORT_PUSH_MIRROR,
1125 flags & TRANSPORT_PUSH_FORCE);
1126
1127 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1128 if (run_pre_push_hook(transport, remote_refs))
1129 return -1;
1130
1131 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1132 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1133 !is_bare_repository()) {
1134 struct ref *ref = remote_refs;
1135 struct oid_array commits = OID_ARRAY_INIT;
1136
1137 for (; ref; ref = ref->next)
1138 if (!is_null_oid(&ref->new_oid))
1139 oid_array_append(&commits,
1140 &ref->new_oid);
1141
1142 if (!push_unpushed_submodules(&commits,
1143 transport->remote,
1144 rs,
1145 transport->push_options,
1146 pretend)) {
1147 oid_array_clear(&commits);
1148 die(_("failed to push all needed submodules"));
1149 }
1150 oid_array_clear(&commits);
1151 }
1152
1153 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1154 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1155 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1156 !pretend)) && !is_bare_repository()) {
1157 struct ref *ref = remote_refs;
1158 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1159 struct oid_array commits = OID_ARRAY_INIT;
1160
1161 for (; ref; ref = ref->next)
1162 if (!is_null_oid(&ref->new_oid))
1163 oid_array_append(&commits,
1164 &ref->new_oid);
1165
1166 if (find_unpushed_submodules(&commits, transport->remote->name,
1167 &needs_pushing)) {
1168 oid_array_clear(&commits);
1169 die_with_unpushed_submodules(&needs_pushing);
1170 }
1171 string_list_clear(&needs_pushing, 0);
1172 oid_array_clear(&commits);
1173 }
1174
1175 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1176 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1177 else
1178 push_ret = 0;
1179 err = push_had_errors(remote_refs);
1180 ret = push_ret | err;
1181
1182 if (!quiet || err)
1183 transport_print_push_status(transport->url, remote_refs,
1184 verbose | porcelain, porcelain,
1185 reject_reasons);
1186
1187 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1188 set_upstreams(transport, remote_refs, pretend);
1189
1190 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1191 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1192 struct ref *ref;
1193 for (ref = remote_refs; ref; ref = ref->next)
1194 transport_update_tracking_ref(transport->remote, ref, verbose);
1195 }
1196
1197 if (porcelain && !push_ret)
1198 puts("Done");
1199 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1200 fprintf(stderr, "Everything up-to-date\n");
1201
1202 return ret;
1203 }
1204 return 1;
1205 }
1206
1207 const struct ref *transport_get_remote_refs(struct transport *transport,
1208 const struct argv_array *ref_prefixes)
1209 {
1210 if (!transport->got_remote_refs) {
1211 transport->remote_refs =
1212 transport->vtable->get_refs_list(transport, 0,
1213 ref_prefixes);
1214 transport->got_remote_refs = 1;
1215 }
1216
1217 return transport->remote_refs;
1218 }
1219
1220 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1221 {
1222 int rc;
1223 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1224 struct ref **heads = NULL;
1225 struct ref *rm;
1226
1227 for (rm = refs; rm; rm = rm->next) {
1228 nr_refs++;
1229 if (rm->peer_ref &&
1230 !is_null_oid(&rm->old_oid) &&
1231 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1232 continue;
1233 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1234 heads[nr_heads++] = rm;
1235 }
1236
1237 if (!nr_heads) {
1238 /*
1239 * When deepening of a shallow repository is requested,
1240 * then local and remote refs are likely to still be equal.
1241 * Just feed them all to the fetch method in that case.
1242 * This condition shouldn't be met in a non-deepening fetch
1243 * (see builtin/fetch.c:quickfetch()).
1244 */
1245 ALLOC_ARRAY(heads, nr_refs);
1246 for (rm = refs; rm; rm = rm->next)
1247 heads[nr_heads++] = rm;
1248 }
1249
1250 rc = transport->vtable->fetch(transport, nr_heads, heads);
1251
1252 free(heads);
1253 return rc;
1254 }
1255
1256 void transport_unlock_pack(struct transport *transport)
1257 {
1258 if (transport->pack_lockfile) {
1259 unlink_or_warn(transport->pack_lockfile);
1260 FREE_AND_NULL(transport->pack_lockfile);
1261 }
1262 }
1263
1264 int transport_connect(struct transport *transport, const char *name,
1265 const char *exec, int fd[2])
1266 {
1267 if (transport->vtable->connect)
1268 return transport->vtable->connect(transport, name, exec, fd);
1269 else
1270 die(_("operation not supported by protocol"));
1271 }
1272
1273 int transport_disconnect(struct transport *transport)
1274 {
1275 int ret = 0;
1276 if (transport->vtable->disconnect)
1277 ret = transport->vtable->disconnect(transport);
1278 free(transport);
1279 return ret;
1280 }
1281
1282 /*
1283 * Strip username (and password) from a URL and return
1284 * it in a newly allocated string.
1285 */
1286 char *transport_anonymize_url(const char *url)
1287 {
1288 char *scheme_prefix, *anon_part;
1289 size_t anon_len, prefix_len = 0;
1290
1291 anon_part = strchr(url, '@');
1292 if (url_is_local_not_ssh(url) || !anon_part)
1293 goto literal_copy;
1294
1295 anon_len = strlen(++anon_part);
1296 scheme_prefix = strstr(url, "://");
1297 if (!scheme_prefix) {
1298 if (!strchr(anon_part, ':'))
1299 /* cannot be "me@there:/path/name" */
1300 goto literal_copy;
1301 } else {
1302 const char *cp;
1303 /* make sure scheme is reasonable */
1304 for (cp = url; cp < scheme_prefix; cp++) {
1305 switch (*cp) {
1306 /* RFC 1738 2.1 */
1307 case '+': case '.': case '-':
1308 break; /* ok */
1309 default:
1310 if (isalnum(*cp))
1311 break;
1312 /* it isn't */
1313 goto literal_copy;
1314 }
1315 }
1316 /* @ past the first slash does not count */
1317 cp = strchr(scheme_prefix + 3, '/');
1318 if (cp && cp < anon_part)
1319 goto literal_copy;
1320 prefix_len = scheme_prefix - url + 3;
1321 }
1322 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1323 (int)anon_len, anon_part);
1324 literal_copy:
1325 return xstrdup(url);
1326 }
1327
1328 static void read_alternate_refs(const char *path,
1329 alternate_ref_fn *cb,
1330 void *data)
1331 {
1332 struct child_process cmd = CHILD_PROCESS_INIT;
1333 struct strbuf line = STRBUF_INIT;
1334 FILE *fh;
1335
1336 cmd.git_cmd = 1;
1337 argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1338 argv_array_push(&cmd.args, "for-each-ref");
1339 argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1340 cmd.env = local_repo_env;
1341 cmd.out = -1;
1342
1343 if (start_command(&cmd))
1344 return;
1345
1346 fh = xfdopen(cmd.out, "r");
1347 while (strbuf_getline_lf(&line, fh) != EOF) {
1348 struct object_id oid;
1349
1350 if (get_oid_hex(line.buf, &oid) ||
1351 line.buf[GIT_SHA1_HEXSZ] != ' ') {
1352 warning(_("invalid line while parsing alternate refs: %s"),
1353 line.buf);
1354 break;
1355 }
1356
1357 cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1358 }
1359
1360 fclose(fh);
1361 finish_command(&cmd);
1362 }
1363
1364 struct alternate_refs_data {
1365 alternate_ref_fn *fn;
1366 void *data;
1367 };
1368
1369 static int refs_from_alternate_cb(struct alternate_object_database *e,
1370 void *data)
1371 {
1372 struct strbuf path = STRBUF_INIT;
1373 size_t base_len;
1374 struct alternate_refs_data *cb = data;
1375
1376 if (!strbuf_realpath(&path, e->path, 0))
1377 goto out;
1378 if (!strbuf_strip_suffix(&path, "/objects"))
1379 goto out;
1380 base_len = path.len;
1381
1382 /* Is this a git repository with refs? */
1383 strbuf_addstr(&path, "/refs");
1384 if (!is_directory(path.buf))
1385 goto out;
1386 strbuf_setlen(&path, base_len);
1387
1388 read_alternate_refs(path.buf, cb->fn, cb->data);
1389
1390 out:
1391 strbuf_release(&path);
1392 return 0;
1393 }
1394
1395 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1396 {
1397 struct alternate_refs_data cb;
1398 cb.fn = fn;
1399 cb.data = data;
1400 foreach_alt_odb(refs_from_alternate_cb, &cb);
1401 }
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