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