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t3427: adjust stale comment
[git.git] / transport.c
blobffe21158455116972dd8b0cf77167948fb6e66e6
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 "oid-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 unsigned get_refs_from_bundle_called : 1;
126 };
127
128 static struct ref *get_refs_from_bundle(struct transport *transport,
129 int for_push,
130 const struct strvec *ref_prefixes)
131 {
132 struct bundle_transport_data *data = transport->data;
133 struct ref *result = NULL;
134 int i;
135
136 if (for_push)
137 return NULL;
138
139 data->get_refs_from_bundle_called = 1;
140
141 if (data->fd > 0)
142 close(data->fd);
143 data->fd = read_bundle_header(transport->url, &data->header);
144 if (data->fd < 0)
145 die(_("could not read bundle '%s'"), transport->url);
146
147 transport->hash_algo = data->header.hash_algo;
148
149 for (i = 0; i < data->header.references.nr; i++) {
150 struct ref_list_entry *e = data->header.references.list + i;
151 struct ref *ref = alloc_ref(e->name);
152 oidcpy(&ref->old_oid, &e->oid);
153 ref->next = result;
154 result = ref;
155 }
156 return result;
157 }
158
159 static int fetch_refs_from_bundle(struct transport *transport,
160 int nr_heads, struct ref **to_fetch)
161 {
162 struct bundle_transport_data *data = transport->data;
163 int ret;
164
165 if (!data->get_refs_from_bundle_called)
166 get_refs_from_bundle(transport, 0, NULL);
167 ret = unbundle(the_repository, &data->header, data->fd,
168 transport->progress ? BUNDLE_VERBOSE : 0);
169 transport->hash_algo = data->header.hash_algo;
170 return ret;
171 }
172
173 static int close_bundle(struct transport *transport)
174 {
175 struct bundle_transport_data *data = transport->data;
176 if (data->fd > 0)
177 close(data->fd);
178 free(data);
179 return 0;
180 }
181
182 struct git_transport_data {
183 struct git_transport_options options;
184 struct child_process *conn;
185 int fd[2];
186 unsigned got_remote_heads : 1;
187 enum protocol_version version;
188 struct oid_array extra_have;
189 struct oid_array shallow;
190 };
191
192 static int set_git_option(struct git_transport_options *opts,
193 const char *name, const char *value)
194 {
195 if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
196 opts->uploadpack = value;
197 return 0;
198 } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
199 opts->receivepack = value;
200 return 0;
201 } else if (!strcmp(name, TRANS_OPT_THIN)) {
202 opts->thin = !!value;
203 return 0;
204 } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
205 opts->followtags = !!value;
206 return 0;
207 } else if (!strcmp(name, TRANS_OPT_KEEP)) {
208 opts->keep = !!value;
209 return 0;
210 } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
211 opts->update_shallow = !!value;
212 return 0;
213 } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
214 if (!value)
215 opts->depth = 0;
216 else {
217 char *end;
218 opts->depth = strtol(value, &end, 0);
219 if (*end)
220 die(_("transport: invalid depth option '%s'"), value);
221 }
222 return 0;
223 } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
224 opts->deepen_since = value;
225 return 0;
226 } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
227 opts->deepen_not = (const struct string_list *)value;
228 return 0;
229 } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
230 opts->deepen_relative = !!value;
231 return 0;
232 } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
233 opts->from_promisor = !!value;
234 return 0;
235 } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
236 list_objects_filter_die_if_populated(&opts->filter_options);
237 parse_list_objects_filter(&opts->filter_options, value);
238 return 0;
239 }
240 return 1;
241 }
242
243 static int connect_setup(struct transport *transport, int for_push)
244 {
245 struct git_transport_data *data = transport->data;
246 int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
247
248 if (data->conn)
249 return 0;
250
251 switch (transport->family) {
252 case TRANSPORT_FAMILY_ALL: break;
253 case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
254 case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
255 }
256
257 data->conn = git_connect(data->fd, transport->url,
258 for_push ? data->options.receivepack :
259 data->options.uploadpack,
260 flags);
261
262 return 0;
263 }
264
265 static void die_if_server_options(struct transport *transport)
266 {
267 if (!transport->server_options || !transport->server_options->nr)
268 return;
269 advise(_("see protocol.version in 'git help config' for more details"));
270 die(_("server options require protocol version 2 or later"));
271 }
272
273 /*
274 * Obtains the protocol version from the transport and writes it to
275 * transport->data->version, first connecting if not already connected.
276 *
277 * If the protocol version is one that allows skipping the listing of remote
278 * refs, and must_list_refs is 0, the listing of remote refs is skipped and
279 * this function returns NULL. Otherwise, this function returns the list of
280 * remote refs.
281 */
282 static struct ref *handshake(struct transport *transport, int for_push,
283 const struct strvec *ref_prefixes,
284 int must_list_refs)
285 {
286 struct git_transport_data *data = transport->data;
287 struct ref *refs = NULL;
288 struct packet_reader reader;
289
290 connect_setup(transport, for_push);
291
292 packet_reader_init(&reader, data->fd[0], NULL, 0,
293 PACKET_READ_CHOMP_NEWLINE |
294 PACKET_READ_GENTLE_ON_EOF |
295 PACKET_READ_DIE_ON_ERR_PACKET);
296
297 data->version = discover_version(&reader);
298 switch (data->version) {
299 case protocol_v2:
300 if (must_list_refs)
301 get_remote_refs(data->fd[1], &reader, &refs, for_push,
302 ref_prefixes,
303 transport->server_options,
304 transport->stateless_rpc);
305 break;
306 case protocol_v1:
307 case protocol_v0:
308 die_if_server_options(transport);
309 get_remote_heads(&reader, &refs,
310 for_push ? REF_NORMAL : 0,
311 &data->extra_have,
312 &data->shallow);
313 break;
314 case protocol_unknown_version:
315 BUG("unknown protocol version");
316 }
317 data->got_remote_heads = 1;
318 transport->hash_algo = reader.hash_algo;
319
320 if (reader.line_peeked)
321 BUG("buffer must be empty at the end of handshake()");
322
323 return refs;
324 }
325
326 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
327 const struct strvec *ref_prefixes)
328 {
329 return handshake(transport, for_push, ref_prefixes, 1);
330 }
331
332 static int fetch_refs_via_pack(struct transport *transport,
333 int nr_heads, struct ref **to_fetch)
334 {
335 int ret = 0;
336 struct git_transport_data *data = transport->data;
337 struct ref *refs = NULL;
338 struct fetch_pack_args args;
339 struct ref *refs_tmp = NULL;
340
341 memset(&args, 0, sizeof(args));
342 args.uploadpack = data->options.uploadpack;
343 args.keep_pack = data->options.keep;
344 args.lock_pack = 1;
345 args.use_thin_pack = data->options.thin;
346 args.include_tag = data->options.followtags;
347 args.verbose = (transport->verbose > 1);
348 args.quiet = (transport->verbose < 0);
349 args.no_progress = !transport->progress;
350 args.depth = data->options.depth;
351 args.deepen_since = data->options.deepen_since;
352 args.deepen_not = data->options.deepen_not;
353 args.deepen_relative = data->options.deepen_relative;
354 args.check_self_contained_and_connected =
355 data->options.check_self_contained_and_connected;
356 args.cloning = transport->cloning;
357 args.update_shallow = data->options.update_shallow;
358 args.from_promisor = data->options.from_promisor;
359 args.filter_options = data->options.filter_options;
360 args.stateless_rpc = transport->stateless_rpc;
361 args.server_options = transport->server_options;
362 args.negotiation_tips = data->options.negotiation_tips;
363
364 if (!data->got_remote_heads) {
365 int i;
366 int must_list_refs = 0;
367 for (i = 0; i < nr_heads; i++) {
368 if (!to_fetch[i]->exact_oid) {
369 must_list_refs = 1;
370 break;
371 }
372 }
373 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
374 }
375
376 if (data->version == protocol_unknown_version)
377 BUG("unknown protocol version");
378 else if (data->version <= protocol_v1)
379 die_if_server_options(transport);
380
381 refs = fetch_pack(&args, data->fd,
382 refs_tmp ? refs_tmp : transport->remote_refs,
383 to_fetch, nr_heads, &data->shallow,
384 &transport->pack_lockfiles, data->version);
385
386 close(data->fd[0]);
387 close(data->fd[1]);
388 if (finish_connect(data->conn))
389 ret = -1;
390 data->conn = NULL;
391 data->got_remote_heads = 0;
392 data->options.self_contained_and_connected =
393 args.self_contained_and_connected;
394 data->options.connectivity_checked = args.connectivity_checked;
395
396 if (refs == NULL)
397 ret = -1;
398 if (report_unmatched_refs(to_fetch, nr_heads))
399 ret = -1;
400
401 free_refs(refs_tmp);
402 free_refs(refs);
403 return ret;
404 }
405
406 static int push_had_errors(struct ref *ref)
407 {
408 for (; ref; ref = ref->next) {
409 switch (ref->status) {
410 case REF_STATUS_NONE:
411 case REF_STATUS_UPTODATE:
412 case REF_STATUS_OK:
413 break;
414 default:
415 return 1;
416 }
417 }
418 return 0;
419 }
420
421 int transport_refs_pushed(struct ref *ref)
422 {
423 for (; ref; ref = ref->next) {
424 switch(ref->status) {
425 case REF_STATUS_NONE:
426 case REF_STATUS_UPTODATE:
427 break;
428 default:
429 return 1;
430 }
431 }
432 return 0;
433 }
434
435 static void update_one_tracking_ref(struct remote *remote, char *refname,
436 struct object_id *new_oid, int deletion,
437 int verbose)
438 {
439 struct refspec_item rs;
440
441 memset(&rs, 0, sizeof(rs));
442 rs.src = refname;
443 rs.dst = NULL;
444
445 if (!remote_find_tracking(remote, &rs)) {
446 if (verbose)
447 fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
448 if (deletion)
449 delete_ref(NULL, rs.dst, NULL, 0);
450 else
451 update_ref("update by push", rs.dst, new_oid,
452 NULL, 0, 0);
453 free(rs.dst);
454 }
455 }
456
457 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
458 {
459 char *refname;
460 struct object_id *new_oid;
461 struct ref_push_report *report;
462
463 if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
464 return;
465
466 report = ref->report;
467 if (!report)
468 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
469 ref->deletion, verbose);
470 else
471 for (; report; report = report->next) {
472 refname = report->ref_name ? (char *)report->ref_name : ref->name;
473 new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
474 update_one_tracking_ref(remote, refname, new_oid,
475 is_null_oid(new_oid), verbose);
476 }
477 }
478
479 static void print_ref_status(char flag, const char *summary,
480 struct ref *to, struct ref *from, const char *msg,
481 struct ref_push_report *report,
482 int porcelain, int summary_width)
483 {
484 const char *to_name;
485
486 if (report && report->ref_name)
487 to_name = report->ref_name;
488 else
489 to_name = to->name;
490
491 if (porcelain) {
492 if (from)
493 fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
494 else
495 fprintf(stdout, "%c\t:%s\t", flag, to_name);
496 if (msg)
497 fprintf(stdout, "%s (%s)\n", summary, msg);
498 else
499 fprintf(stdout, "%s\n", summary);
500 } else {
501 const char *red = "", *reset = "";
502 if (push_had_errors(to)) {
503 red = transport_get_color(TRANSPORT_COLOR_REJECTED);
504 reset = transport_get_color(TRANSPORT_COLOR_RESET);
505 }
506 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
507 summary, reset);
508 if (from)
509 fprintf(stderr, "%s -> %s",
510 prettify_refname(from->name),
511 prettify_refname(to_name));
512 else
513 fputs(prettify_refname(to_name), stderr);
514 if (msg) {
515 fputs(" (", stderr);
516 fputs(msg, stderr);
517 fputc(')', stderr);
518 }
519 fputc('\n', stderr);
520 }
521 }
522
523 static void print_ok_ref_status(struct ref *ref,
524 struct ref_push_report *report,
525 int porcelain, int summary_width)
526 {
527 struct object_id *old_oid;
528 struct object_id *new_oid;
529 const char *ref_name;
530 int forced_update;
531
532 if (report && report->old_oid)
533 old_oid = report->old_oid;
534 else
535 old_oid = &ref->old_oid;
536 if (report && report->new_oid)
537 new_oid = report->new_oid;
538 else
539 new_oid = &ref->new_oid;
540 if (report && report->forced_update)
541 forced_update = report->forced_update;
542 else
543 forced_update = ref->forced_update;
544 if (report && report->ref_name)
545 ref_name = report->ref_name;
546 else
547 ref_name = ref->name;
548
549 if (ref->deletion)
550 print_ref_status('-', "[deleted]", ref, NULL, NULL,
551 report, porcelain, summary_width);
552 else if (is_null_oid(old_oid))
553 print_ref_status('*',
554 (starts_with(ref_name, "refs/tags/")
555 ? "[new tag]"
556 : (starts_with(ref_name, "refs/heads/")
557 ? "[new branch]"
558 : "[new reference]")),
559 ref, ref->peer_ref, NULL,
560 report, porcelain, summary_width);
561 else {
562 struct strbuf quickref = STRBUF_INIT;
563 char type;
564 const char *msg;
565
566 strbuf_add_unique_abbrev(&quickref, old_oid,
567 DEFAULT_ABBREV);
568 if (forced_update) {
569 strbuf_addstr(&quickref, "...");
570 type = '+';
571 msg = "forced update";
572 } else {
573 strbuf_addstr(&quickref, "..");
574 type = ' ';
575 msg = NULL;
576 }
577 strbuf_add_unique_abbrev(&quickref, new_oid,
578 DEFAULT_ABBREV);
579
580 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
581 report, porcelain, summary_width);
582 strbuf_release(&quickref);
583 }
584 }
585
586 static int print_one_push_report(struct ref *ref, const char *dest, int count,
587 struct ref_push_report *report,
588 int porcelain, int summary_width)
589 {
590 if (!count) {
591 char *url = transport_anonymize_url(dest);
592 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
593 free(url);
594 }
595
596 switch(ref->status) {
597 case REF_STATUS_NONE:
598 print_ref_status('X', "[no match]", ref, NULL, NULL,
599 report, porcelain, summary_width);
600 break;
601 case REF_STATUS_REJECT_NODELETE:
602 print_ref_status('!', "[rejected]", ref, NULL,
603 "remote does not support deleting refs",
604 report, porcelain, summary_width);
605 break;
606 case REF_STATUS_UPTODATE:
607 print_ref_status('=', "[up to date]", ref,
608 ref->peer_ref, NULL,
609 report, porcelain, summary_width);
610 break;
611 case REF_STATUS_REJECT_NONFASTFORWARD:
612 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
613 "non-fast-forward",
614 report, porcelain, summary_width);
615 break;
616 case REF_STATUS_REJECT_ALREADY_EXISTS:
617 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
618 "already exists",
619 report, porcelain, summary_width);
620 break;
621 case REF_STATUS_REJECT_FETCH_FIRST:
622 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
623 "fetch first",
624 report, porcelain, summary_width);
625 break;
626 case REF_STATUS_REJECT_NEEDS_FORCE:
627 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
628 "needs force",
629 report, porcelain, summary_width);
630 break;
631 case REF_STATUS_REJECT_STALE:
632 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
633 "stale info",
634 report, porcelain, summary_width);
635 break;
636 case REF_STATUS_REJECT_SHALLOW:
637 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
638 "new shallow roots not allowed",
639 report, porcelain, summary_width);
640 break;
641 case REF_STATUS_REMOTE_REJECT:
642 print_ref_status('!', "[remote rejected]", ref,
643 ref->deletion ? NULL : ref->peer_ref,
644 ref->remote_status,
645 report, porcelain, summary_width);
646 break;
647 case REF_STATUS_EXPECTING_REPORT:
648 print_ref_status('!', "[remote failure]", ref,
649 ref->deletion ? NULL : ref->peer_ref,
650 "remote failed to report status",
651 report, porcelain, summary_width);
652 break;
653 case REF_STATUS_ATOMIC_PUSH_FAILED:
654 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
655 "atomic push failed",
656 report, porcelain, summary_width);
657 break;
658 case REF_STATUS_OK:
659 print_ok_ref_status(ref, report, porcelain, summary_width);
660 break;
661 }
662
663 return 1;
664 }
665
666 static int print_one_push_status(struct ref *ref, const char *dest, int count,
667 int porcelain, int summary_width)
668 {
669 struct ref_push_report *report;
670 int n = 0;
671
672 if (!ref->report)
673 return print_one_push_report(ref, dest, count,
674 NULL, porcelain, summary_width);
675
676 for (report = ref->report; report; report = report->next)
677 print_one_push_report(ref, dest, count + n++,
678 report, porcelain, summary_width);
679 return n;
680 }
681
682 static int measure_abbrev(const struct object_id *oid, int sofar)
683 {
684 char hex[GIT_MAX_HEXSZ + 1];
685 int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
686
687 return (w < sofar) ? sofar : w;
688 }
689
690 int transport_summary_width(const struct ref *refs)
691 {
692 int maxw = -1;
693
694 for (; refs; refs = refs->next) {
695 maxw = measure_abbrev(&refs->old_oid, maxw);
696 maxw = measure_abbrev(&refs->new_oid, maxw);
697 }
698 if (maxw < 0)
699 maxw = FALLBACK_DEFAULT_ABBREV;
700 return (2 * maxw + 3);
701 }
702
703 void transport_print_push_status(const char *dest, struct ref *refs,
704 int verbose, int porcelain, unsigned int *reject_reasons)
705 {
706 struct ref *ref;
707 int n = 0;
708 char *head;
709 int summary_width = transport_summary_width(refs);
710
711 if (transport_color_config() < 0)
712 warning(_("could not parse transport.color.* config"));
713
714 head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
715
716 if (verbose) {
717 for (ref = refs; ref; ref = ref->next)
718 if (ref->status == REF_STATUS_UPTODATE)
719 n += print_one_push_status(ref, dest, n,
720 porcelain, summary_width);
721 }
722
723 for (ref = refs; ref; ref = ref->next)
724 if (ref->status == REF_STATUS_OK)
725 n += print_one_push_status(ref, dest, n,
726 porcelain, summary_width);
727
728 *reject_reasons = 0;
729 for (ref = refs; ref; ref = ref->next) {
730 if (ref->status != REF_STATUS_NONE &&
731 ref->status != REF_STATUS_UPTODATE &&
732 ref->status != REF_STATUS_OK)
733 n += print_one_push_status(ref, dest, n,
734 porcelain, summary_width);
735 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
736 if (head != NULL && !strcmp(head, ref->name))
737 *reject_reasons |= REJECT_NON_FF_HEAD;
738 else
739 *reject_reasons |= REJECT_NON_FF_OTHER;
740 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
741 *reject_reasons |= REJECT_ALREADY_EXISTS;
742 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
743 *reject_reasons |= REJECT_FETCH_FIRST;
744 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
745 *reject_reasons |= REJECT_NEEDS_FORCE;
746 }
747 }
748 free(head);
749 }
750
751 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
752 {
753 struct git_transport_data *data = transport->data;
754 struct send_pack_args args;
755 int ret = 0;
756
757 if (transport_color_config() < 0)
758 return -1;
759
760 if (!data->got_remote_heads)
761 get_refs_via_connect(transport, 1, NULL);
762
763 memset(&args, 0, sizeof(args));
764 args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
765 args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
766 args.use_thin_pack = data->options.thin;
767 args.verbose = (transport->verbose > 0);
768 args.quiet = (transport->verbose < 0);
769 args.progress = transport->progress;
770 args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
771 args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
772 args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
773 args.push_options = transport->push_options;
774 args.url = transport->url;
775
776 if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
777 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
778 else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
779 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
780 else
781 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
782
783 switch (data->version) {
784 case protocol_v2:
785 die(_("support for protocol v2 not implemented yet"));
786 break;
787 case protocol_v1:
788 case protocol_v0:
789 ret = send_pack(&args, data->fd, data->conn, remote_refs,
790 &data->extra_have);
791 break;
792 case protocol_unknown_version:
793 BUG("unknown protocol version");
794 }
795
796 close(data->fd[1]);
797 close(data->fd[0]);
798 /*
799 * Atomic push may abort the connection early and close the pipe,
800 * which may cause an error for `finish_connect()`. Ignore this error
801 * for atomic git-push.
802 */
803 if (ret || args.atomic)
804 finish_connect(data->conn);
805 else
806 ret = finish_connect(data->conn);
807 data->conn = NULL;
808 data->got_remote_heads = 0;
809
810 return ret;
811 }
812
813 static int connect_git(struct transport *transport, const char *name,
814 const char *executable, int fd[2])
815 {
816 struct git_transport_data *data = transport->data;
817 data->conn = git_connect(data->fd, transport->url,
818 executable, 0);
819 fd[0] = data->fd[0];
820 fd[1] = data->fd[1];
821 return 0;
822 }
823
824 static int disconnect_git(struct transport *transport)
825 {
826 struct git_transport_data *data = transport->data;
827 if (data->conn) {
828 if (data->got_remote_heads && !transport->stateless_rpc)
829 packet_flush(data->fd[1]);
830 close(data->fd[0]);
831 close(data->fd[1]);
832 finish_connect(data->conn);
833 }
834
835 free(data);
836 return 0;
837 }
838
839 static struct transport_vtable taken_over_vtable = {
840 NULL,
841 get_refs_via_connect,
842 fetch_refs_via_pack,
843 git_transport_push,
844 NULL,
845 disconnect_git
846 };
847
848 void transport_take_over(struct transport *transport,
849 struct child_process *child)
850 {
851 struct git_transport_data *data;
852
853 if (!transport->smart_options)
854 BUG("taking over transport requires non-NULL "
855 "smart_options field.");
856
857 data = xcalloc(1, sizeof(*data));
858 data->options = *transport->smart_options;
859 data->conn = child;
860 data->fd[0] = data->conn->out;
861 data->fd[1] = data->conn->in;
862 data->got_remote_heads = 0;
863 transport->data = data;
864
865 transport->vtable = &taken_over_vtable;
866 transport->smart_options = &(data->options);
867
868 transport->cannot_reuse = 1;
869 }
870
871 static int is_file(const char *url)
872 {
873 struct stat buf;
874 if (stat(url, &buf))
875 return 0;
876 return S_ISREG(buf.st_mode);
877 }
878
879 static int external_specification_len(const char *url)
880 {
881 return strchr(url, ':') - url;
882 }
883
884 static const struct string_list *protocol_whitelist(void)
885 {
886 static int enabled = -1;
887 static struct string_list allowed = STRING_LIST_INIT_DUP;
888
889 if (enabled < 0) {
890 const char *v = getenv("GIT_ALLOW_PROTOCOL");
891 if (v) {
892 string_list_split(&allowed, v, ':', -1);
893 string_list_sort(&allowed);
894 enabled = 1;
895 } else {
896 enabled = 0;
897 }
898 }
899
900 return enabled ? &allowed : NULL;
901 }
902
903 enum protocol_allow_config {
904 PROTOCOL_ALLOW_NEVER = 0,
905 PROTOCOL_ALLOW_USER_ONLY,
906 PROTOCOL_ALLOW_ALWAYS
907 };
908
909 static enum protocol_allow_config parse_protocol_config(const char *key,
910 const char *value)
911 {
912 if (!strcasecmp(value, "always"))
913 return PROTOCOL_ALLOW_ALWAYS;
914 else if (!strcasecmp(value, "never"))
915 return PROTOCOL_ALLOW_NEVER;
916 else if (!strcasecmp(value, "user"))
917 return PROTOCOL_ALLOW_USER_ONLY;
918
919 die(_("unknown value for config '%s': %s"), key, value);
920 }
921
922 static enum protocol_allow_config get_protocol_config(const char *type)
923 {
924 char *key = xstrfmt("protocol.%s.allow", type);
925 char *value;
926
927 /* first check the per-protocol config */
928 if (!git_config_get_string(key, &value)) {
929 enum protocol_allow_config ret =
930 parse_protocol_config(key, value);
931 free(key);
932 free(value);
933 return ret;
934 }
935 free(key);
936
937 /* if defined, fallback to user-defined default for unknown protocols */
938 if (!git_config_get_string("protocol.allow", &value)) {
939 enum protocol_allow_config ret =
940 parse_protocol_config("protocol.allow", value);
941 free(value);
942 return ret;
943 }
944
945 /* fallback to built-in defaults */
946 /* known safe */
947 if (!strcmp(type, "http") ||
948 !strcmp(type, "https") ||
949 !strcmp(type, "git") ||
950 !strcmp(type, "ssh") ||
951 !strcmp(type, "file"))
952 return PROTOCOL_ALLOW_ALWAYS;
953
954 /* known scary; err on the side of caution */
955 if (!strcmp(type, "ext"))
956 return PROTOCOL_ALLOW_NEVER;
957
958 /* unknown; by default let them be used only directly by the user */
959 return PROTOCOL_ALLOW_USER_ONLY;
960 }
961
962 int is_transport_allowed(const char *type, int from_user)
963 {
964 const struct string_list *whitelist = protocol_whitelist();
965 if (whitelist)
966 return string_list_has_string(whitelist, type);
967
968 switch (get_protocol_config(type)) {
969 case PROTOCOL_ALLOW_ALWAYS:
970 return 1;
971 case PROTOCOL_ALLOW_NEVER:
972 return 0;
973 case PROTOCOL_ALLOW_USER_ONLY:
974 if (from_user < 0)
975 from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
976 return from_user;
977 }
978
979 BUG("invalid protocol_allow_config type");
980 }
981
982 void transport_check_allowed(const char *type)
983 {
984 if (!is_transport_allowed(type, -1))
985 die(_("transport '%s' not allowed"), type);
986 }
987
988 static struct transport_vtable bundle_vtable = {
989 NULL,
990 get_refs_from_bundle,
991 fetch_refs_from_bundle,
992 NULL,
993 NULL,
994 close_bundle
995 };
996
997 static struct transport_vtable builtin_smart_vtable = {
998 NULL,
999 get_refs_via_connect,
1000 fetch_refs_via_pack,
1001 git_transport_push,
1002 connect_git,
1003 disconnect_git
1004 };
1005
1006 struct transport *transport_get(struct remote *remote, const char *url)
1007 {
1008 const char *helper;
1009 struct transport *ret = xcalloc(1, sizeof(*ret));
1010
1011 ret->progress = isatty(2);
1012 string_list_init(&ret->pack_lockfiles, 1);
1013
1014 if (!remote)
1015 BUG("No remote provided to transport_get()");
1016
1017 ret->got_remote_refs = 0;
1018 ret->remote = remote;
1019 helper = remote->foreign_vcs;
1020
1021 if (!url && remote->url)
1022 url = remote->url[0];
1023 ret->url = url;
1024
1025 /* maybe it is a foreign URL? */
1026 if (url) {
1027 const char *p = url;
1028
1029 while (is_urlschemechar(p == url, *p))
1030 p++;
1031 if (starts_with(p, "::"))
1032 helper = xstrndup(url, p - url);
1033 }
1034
1035 if (helper) {
1036 transport_helper_init(ret, helper);
1037 } else if (starts_with(url, "rsync:")) {
1038 die(_("git-over-rsync is no longer supported"));
1039 } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1040 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1041 transport_check_allowed("file");
1042 ret->data = data;
1043 ret->vtable = &bundle_vtable;
1044 ret->smart_options = NULL;
1045 } else if (!is_url(url)
1046 || starts_with(url, "file://")
1047 || starts_with(url, "git://")
1048 || starts_with(url, "ssh://")
1049 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1050 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1051 ) {
1052 /*
1053 * These are builtin smart transports; "allowed" transports
1054 * will be checked individually in git_connect.
1055 */
1056 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1057 ret->data = data;
1058 ret->vtable = &builtin_smart_vtable;
1059 ret->smart_options = &(data->options);
1060
1061 data->conn = NULL;
1062 data->got_remote_heads = 0;
1063 } else {
1064 /* Unknown protocol in URL. Pass to external handler. */
1065 int len = external_specification_len(url);
1066 char *handler = xmemdupz(url, len);
1067 transport_helper_init(ret, handler);
1068 }
1069
1070 if (ret->smart_options) {
1071 ret->smart_options->thin = 1;
1072 ret->smart_options->uploadpack = "git-upload-pack";
1073 if (remote->uploadpack)
1074 ret->smart_options->uploadpack = remote->uploadpack;
1075 ret->smart_options->receivepack = "git-receive-pack";
1076 if (remote->receivepack)
1077 ret->smart_options->receivepack = remote->receivepack;
1078 }
1079
1080 ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1081
1082 return ret;
1083 }
1084
1085 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1086 {
1087 return transport->hash_algo;
1088 }
1089
1090 int transport_set_option(struct transport *transport,
1091 const char *name, const char *value)
1092 {
1093 int git_reports = 1, protocol_reports = 1;
1094
1095 if (transport->smart_options)
1096 git_reports = set_git_option(transport->smart_options,
1097 name, value);
1098
1099 if (transport->vtable->set_option)
1100 protocol_reports = transport->vtable->set_option(transport,
1101 name, value);
1102
1103 /* If either report is 0, report 0 (success). */
1104 if (!git_reports || !protocol_reports)
1105 return 0;
1106 /* If either reports -1 (invalid value), report -1. */
1107 if ((git_reports == -1) || (protocol_reports == -1))
1108 return -1;
1109 /* Otherwise if both report unknown, report unknown. */
1110 return 1;
1111 }
1112
1113 void transport_set_verbosity(struct transport *transport, int verbosity,
1114 int force_progress)
1115 {
1116 if (verbosity >= 1)
1117 transport->verbose = verbosity <= 3 ? verbosity : 3;
1118 if (verbosity < 0)
1119 transport->verbose = -1;
1120
1121 /**
1122 * Rules used to determine whether to report progress (processing aborts
1123 * when a rule is satisfied):
1124 *
1125 * . Report progress, if force_progress is 1 (ie. --progress).
1126 * . Don't report progress, if force_progress is 0 (ie. --no-progress).
1127 * . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1128 * . Report progress if isatty(2) is 1.
1129 **/
1130 if (force_progress >= 0)
1131 transport->progress = !!force_progress;
1132 else
1133 transport->progress = verbosity >= 0 && isatty(2);
1134 }
1135
1136 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1137 {
1138 int i;
1139
1140 fprintf(stderr, _("The following submodule paths contain changes that can\n"
1141 "not be found on any remote:\n"));
1142 for (i = 0; i < needs_pushing->nr; i++)
1143 fprintf(stderr, " %s\n", needs_pushing->items[i].string);
1144 fprintf(stderr, _("\nPlease try\n\n"
1145 " git push --recurse-submodules=on-demand\n\n"
1146 "or cd to the path and use\n\n"
1147 " git push\n\n"
1148 "to push them to a remote.\n\n"));
1149
1150 string_list_clear(needs_pushing, 0);
1151
1152 die(_("Aborting."));
1153 }
1154
1155 static int run_pre_push_hook(struct transport *transport,
1156 struct ref *remote_refs)
1157 {
1158 int ret = 0, x;
1159 struct ref *r;
1160 struct child_process proc = CHILD_PROCESS_INIT;
1161 struct strbuf buf;
1162 const char *argv[4];
1163
1164 if (!(argv[0] = find_hook("pre-push")))
1165 return 0;
1166
1167 argv[1] = transport->remote->name;
1168 argv[2] = transport->url;
1169 argv[3] = NULL;
1170
1171 proc.argv = argv;
1172 proc.in = -1;
1173 proc.trace2_hook_name = "pre-push";
1174
1175 if (start_command(&proc)) {
1176 finish_command(&proc);
1177 return -1;
1178 }
1179
1180 sigchain_push(SIGPIPE, SIG_IGN);
1181
1182 strbuf_init(&buf, 256);
1183
1184 for (r = remote_refs; r; r = r->next) {
1185 if (!r->peer_ref) continue;
1186 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1187 if (r->status == REF_STATUS_REJECT_STALE) continue;
1188 if (r->status == REF_STATUS_UPTODATE) continue;
1189
1190 strbuf_reset(&buf);
1191 strbuf_addf( &buf, "%s %s %s %s\n",
1192 r->peer_ref->name, oid_to_hex(&r->new_oid),
1193 r->name, oid_to_hex(&r->old_oid));
1194
1195 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1196 /* We do not mind if a hook does not read all refs. */
1197 if (errno != EPIPE)
1198 ret = -1;
1199 break;
1200 }
1201 }
1202
1203 strbuf_release(&buf);
1204
1205 x = close(proc.in);
1206 if (!ret)
1207 ret = x;
1208
1209 sigchain_pop(SIGPIPE);
1210
1211 x = finish_command(&proc);
1212 if (!ret)
1213 ret = x;
1214
1215 return ret;
1216 }
1217
1218 int transport_push(struct repository *r,
1219 struct transport *transport,
1220 struct refspec *rs, int flags,
1221 unsigned int *reject_reasons)
1222 {
1223 *reject_reasons = 0;
1224
1225 if (transport_color_config() < 0)
1226 return -1;
1227
1228 if (transport->vtable->push_refs) {
1229 struct ref *remote_refs;
1230 struct ref *local_refs = get_local_heads();
1231 int match_flags = MATCH_REFS_NONE;
1232 int verbose = (transport->verbose > 0);
1233 int quiet = (transport->verbose < 0);
1234 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1235 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1236 int push_ret, ret, err;
1237 struct strvec ref_prefixes = STRVEC_INIT;
1238
1239 if (check_push_refs(local_refs, rs) < 0)
1240 return -1;
1241
1242 refspec_ref_prefixes(rs, &ref_prefixes);
1243
1244 trace2_region_enter("transport_push", "get_refs_list", r);
1245 remote_refs = transport->vtable->get_refs_list(transport, 1,
1246 &ref_prefixes);
1247 trace2_region_leave("transport_push", "get_refs_list", r);
1248
1249 strvec_clear(&ref_prefixes);
1250
1251 if (flags & TRANSPORT_PUSH_ALL)
1252 match_flags |= MATCH_REFS_ALL;
1253 if (flags & TRANSPORT_PUSH_MIRROR)
1254 match_flags |= MATCH_REFS_MIRROR;
1255 if (flags & TRANSPORT_PUSH_PRUNE)
1256 match_flags |= MATCH_REFS_PRUNE;
1257 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1258 match_flags |= MATCH_REFS_FOLLOW_TAGS;
1259
1260 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1261 return -1;
1262
1263 if (transport->smart_options &&
1264 transport->smart_options->cas &&
1265 !is_empty_cas(transport->smart_options->cas))
1266 apply_push_cas(transport->smart_options->cas,
1267 transport->remote, remote_refs);
1268
1269 set_ref_status_for_push(remote_refs,
1270 flags & TRANSPORT_PUSH_MIRROR,
1271 flags & TRANSPORT_PUSH_FORCE);
1272
1273 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1274 if (run_pre_push_hook(transport, remote_refs))
1275 return -1;
1276
1277 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1278 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1279 !is_bare_repository()) {
1280 struct ref *ref = remote_refs;
1281 struct oid_array commits = OID_ARRAY_INIT;
1282
1283 trace2_region_enter("transport_push", "push_submodules", r);
1284 for (; ref; ref = ref->next)
1285 if (!is_null_oid(&ref->new_oid))
1286 oid_array_append(&commits,
1287 &ref->new_oid);
1288
1289 if (!push_unpushed_submodules(r,
1290 &commits,
1291 transport->remote,
1292 rs,
1293 transport->push_options,
1294 pretend)) {
1295 oid_array_clear(&commits);
1296 trace2_region_leave("transport_push", "push_submodules", r);
1297 die(_("failed to push all needed submodules"));
1298 }
1299 oid_array_clear(&commits);
1300 trace2_region_leave("transport_push", "push_submodules", r);
1301 }
1302
1303 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1304 ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1305 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1306 !pretend)) && !is_bare_repository()) {
1307 struct ref *ref = remote_refs;
1308 struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1309 struct oid_array commits = OID_ARRAY_INIT;
1310
1311 trace2_region_enter("transport_push", "check_submodules", r);
1312 for (; ref; ref = ref->next)
1313 if (!is_null_oid(&ref->new_oid))
1314 oid_array_append(&commits,
1315 &ref->new_oid);
1316
1317 if (find_unpushed_submodules(r,
1318 &commits,
1319 transport->remote->name,
1320 &needs_pushing)) {
1321 oid_array_clear(&commits);
1322 trace2_region_leave("transport_push", "check_submodules", r);
1323 die_with_unpushed_submodules(&needs_pushing);
1324 }
1325 string_list_clear(&needs_pushing, 0);
1326 oid_array_clear(&commits);
1327 trace2_region_leave("transport_push", "check_submodules", r);
1328 }
1329
1330 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1331 trace2_region_enter("transport_push", "push_refs", r);
1332 push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1333 trace2_region_leave("transport_push", "push_refs", r);
1334 } else
1335 push_ret = 0;
1336 err = push_had_errors(remote_refs);
1337 ret = push_ret | err;
1338
1339 if (!quiet || err)
1340 transport_print_push_status(transport->url, remote_refs,
1341 verbose | porcelain, porcelain,
1342 reject_reasons);
1343
1344 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1345 set_upstreams(transport, remote_refs, pretend);
1346
1347 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1348 TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1349 struct ref *ref;
1350 for (ref = remote_refs; ref; ref = ref->next)
1351 transport_update_tracking_ref(transport->remote, ref, verbose);
1352 }
1353
1354 if (porcelain && !push_ret)
1355 puts("Done");
1356 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1357 fprintf(stderr, "Everything up-to-date\n");
1358
1359 return ret;
1360 }
1361 return 1;
1362 }
1363
1364 const struct ref *transport_get_remote_refs(struct transport *transport,
1365 const struct strvec *ref_prefixes)
1366 {
1367 if (!transport->got_remote_refs) {
1368 transport->remote_refs =
1369 transport->vtable->get_refs_list(transport, 0,
1370 ref_prefixes);
1371 transport->got_remote_refs = 1;
1372 }
1373
1374 return transport->remote_refs;
1375 }
1376
1377 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1378 {
1379 int rc;
1380 int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1381 struct ref **heads = NULL;
1382 struct ref *rm;
1383
1384 for (rm = refs; rm; rm = rm->next) {
1385 nr_refs++;
1386 if (rm->peer_ref &&
1387 !is_null_oid(&rm->old_oid) &&
1388 oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1389 continue;
1390 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1391 heads[nr_heads++] = rm;
1392 }
1393
1394 if (!nr_heads) {
1395 /*
1396 * When deepening of a shallow repository is requested,
1397 * then local and remote refs are likely to still be equal.
1398 * Just feed them all to the fetch method in that case.
1399 * This condition shouldn't be met in a non-deepening fetch
1400 * (see builtin/fetch.c:quickfetch()).
1401 */
1402 ALLOC_ARRAY(heads, nr_refs);
1403 for (rm = refs; rm; rm = rm->next)
1404 heads[nr_heads++] = rm;
1405 }
1406
1407 rc = transport->vtable->fetch(transport, nr_heads, heads);
1408
1409 free(heads);
1410 return rc;
1411 }
1412
1413 void transport_unlock_pack(struct transport *transport)
1414 {
1415 int i;
1416
1417 for (i = 0; i < transport->pack_lockfiles.nr; i++)
1418 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1419 string_list_clear(&transport->pack_lockfiles, 0);
1420 }
1421
1422 int transport_connect(struct transport *transport, const char *name,
1423 const char *exec, int fd[2])
1424 {
1425 if (transport->vtable->connect)
1426 return transport->vtable->connect(transport, name, exec, fd);
1427 else
1428 die(_("operation not supported by protocol"));
1429 }
1430
1431 int transport_disconnect(struct transport *transport)
1432 {
1433 int ret = 0;
1434 if (transport->vtable->disconnect)
1435 ret = transport->vtable->disconnect(transport);
1436 free(transport);
1437 return ret;
1438 }
1439
1440 /*
1441 * Strip username (and password) from a URL and return
1442 * it in a newly allocated string.
1443 */
1444 char *transport_anonymize_url(const char *url)
1445 {
1446 char *scheme_prefix, *anon_part;
1447 size_t anon_len, prefix_len = 0;
1448
1449 anon_part = strchr(url, '@');
1450 if (url_is_local_not_ssh(url) || !anon_part)
1451 goto literal_copy;
1452
1453 anon_len = strlen(++anon_part);
1454 scheme_prefix = strstr(url, "://");
1455 if (!scheme_prefix) {
1456 if (!strchr(anon_part, ':'))
1457 /* cannot be "me@there:/path/name" */
1458 goto literal_copy;
1459 } else {
1460 const char *cp;
1461 /* make sure scheme is reasonable */
1462 for (cp = url; cp < scheme_prefix; cp++) {
1463 switch (*cp) {
1464 /* RFC 1738 2.1 */
1465 case '+': case '.': case '-':
1466 break; /* ok */
1467 default:
1468 if (isalnum(*cp))
1469 break;
1470 /* it isn't */
1471 goto literal_copy;
1472 }
1473 }
1474 /* @ past the first slash does not count */
1475 cp = strchr(scheme_prefix + 3, '/');
1476 if (cp && cp < anon_part)
1477 goto literal_copy;
1478 prefix_len = scheme_prefix - url + 3;
1479 }
1480 return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1481 (int)anon_len, anon_part);
1482 literal_copy:
1483 return xstrdup(url);
1484 }
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