Merge branch 'sb/remove-unused-var-from-builtin-add'
[git] / transport.c
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #include "pkt-line.h"
5 #include "fetch-pack.h"
6 #include "remote.h"
7 #include "connect.h"
8 #include "send-pack.h"
9 #include "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13 #include "branch.h"
14 #include "url.h"
15 #include "submodule.h"
16 #include "string-list.h"
17 #include "sha1-array.h"
18
19 /* rsync support */
20
21 /*
22  * We copy packed-refs and refs/ into a temporary file, then read the
23  * loose refs recursively (sorting whenever possible), and then inserting
24  * those packed refs that are not yet in the list (not validating, but
25  * assuming that the file is sorted).
26  *
27  * Appears refactoring this from refs.c is too cumbersome.
28  */
29
30 static int str_cmp(const void *a, const void *b)
31 {
32         const char *s1 = a;
33         const char *s2 = b;
34
35         return strcmp(s1, s2);
36 }
37
38 /* path->buf + name_offset is expected to point to "refs/" */
39
40 static int read_loose_refs(struct strbuf *path, int name_offset,
41                 struct ref **tail)
42 {
43         DIR *dir = opendir(path->buf);
44         struct dirent *de;
45         struct {
46                 char **entries;
47                 int nr, alloc;
48         } list;
49         int i, pathlen;
50
51         if (!dir)
52                 return -1;
53
54         memset (&list, 0, sizeof(list));
55
56         while ((de = readdir(dir))) {
57                 if (is_dot_or_dotdot(de->d_name))
58                         continue;
59                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
60                 list.entries[list.nr++] = xstrdup(de->d_name);
61         }
62         closedir(dir);
63
64         /* sort the list */
65
66         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
67
68         pathlen = path->len;
69         strbuf_addch(path, '/');
70
71         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
72                 strbuf_addstr(path, list.entries[i]);
73                 if (read_loose_refs(path, name_offset, tail)) {
74                         int fd = open(path->buf, O_RDONLY);
75                         char buffer[40];
76                         struct ref *next;
77
78                         if (fd < 0)
79                                 continue;
80                         next = alloc_ref(path->buf + name_offset);
81                         if (read_in_full(fd, buffer, 40) != 40 ||
82                                         get_sha1_hex(buffer, next->old_sha1)) {
83                                 close(fd);
84                                 free(next);
85                                 continue;
86                         }
87                         close(fd);
88                         (*tail)->next = next;
89                         *tail = next;
90                 }
91         }
92         strbuf_setlen(path, pathlen);
93
94         for (i = 0; i < list.nr; i++)
95                 free(list.entries[i]);
96         free(list.entries);
97
98         return 0;
99 }
100
101 /* insert the packed refs for which no loose refs were found */
102
103 static void insert_packed_refs(const char *packed_refs, struct ref **list)
104 {
105         FILE *f = fopen(packed_refs, "r");
106         static char buffer[PATH_MAX];
107
108         if (!f)
109                 return;
110
111         for (;;) {
112                 int cmp = 0; /* assigned before used */
113                 int len;
114
115                 if (!fgets(buffer, sizeof(buffer), f)) {
116                         fclose(f);
117                         return;
118                 }
119
120                 if (!isxdigit(buffer[0]))
121                         continue;
122                 len = strlen(buffer);
123                 if (len && buffer[len - 1] == '\n')
124                         buffer[--len] = '\0';
125                 if (len < 41)
126                         continue;
127                 while ((*list)->next &&
128                                 (cmp = strcmp(buffer + 41,
129                                       (*list)->next->name)) > 0)
130                         list = &(*list)->next;
131                 if (!(*list)->next || cmp < 0) {
132                         struct ref *next = alloc_ref(buffer + 41);
133                         buffer[40] = '\0';
134                         if (get_sha1_hex(buffer, next->old_sha1)) {
135                                 warning ("invalid SHA-1: %s", buffer);
136                                 free(next);
137                                 continue;
138                         }
139                         next->next = (*list)->next;
140                         (*list)->next = next;
141                         list = &(*list)->next;
142                 }
143         }
144 }
145
146 static void set_upstreams(struct transport *transport, struct ref *refs,
147         int pretend)
148 {
149         struct ref *ref;
150         for (ref = refs; ref; ref = ref->next) {
151                 const char *localname;
152                 const char *tmp;
153                 const char *remotename;
154                 unsigned char sha[20];
155                 int flag = 0;
156                 /*
157                  * Check suitability for tracking. Must be successful /
158                  * already up-to-date ref create/modify (not delete).
159                  */
160                 if (ref->status != REF_STATUS_OK &&
161                         ref->status != REF_STATUS_UPTODATE)
162                         continue;
163                 if (!ref->peer_ref)
164                         continue;
165                 if (is_null_sha1(ref->new_sha1))
166                         continue;
167
168                 /* Follow symbolic refs (mainly for HEAD). */
169                 localname = ref->peer_ref->name;
170                 remotename = ref->name;
171                 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
172                                          sha, &flag);
173                 if (tmp && flag & REF_ISSYMREF &&
174                         starts_with(tmp, "refs/heads/"))
175                         localname = tmp;
176
177                 /* Both source and destination must be local branches. */
178                 if (!localname || !starts_with(localname, "refs/heads/"))
179                         continue;
180                 if (!remotename || !starts_with(remotename, "refs/heads/"))
181                         continue;
182
183                 if (!pretend)
184                         install_branch_config(BRANCH_CONFIG_VERBOSE,
185                                 localname + 11, transport->remote->name,
186                                 remotename);
187                 else
188                         printf("Would set upstream of '%s' to '%s' of '%s'\n",
189                                 localname + 11, remotename + 11,
190                                 transport->remote->name);
191         }
192 }
193
194 static const char *rsync_url(const char *url)
195 {
196         if (!starts_with(url, "rsync://"))
197                 skip_prefix(url, "rsync:", &url);
198         return url;
199 }
200
201 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
202 {
203         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
204         struct ref dummy = {NULL}, *tail = &dummy;
205         struct child_process rsync = CHILD_PROCESS_INIT;
206         const char *args[5];
207         int temp_dir_len;
208
209         if (for_push)
210                 return NULL;
211
212         /* copy the refs to the temporary directory */
213
214         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
215         if (!mkdtemp(temp_dir.buf))
216                 die_errno ("Could not make temporary directory");
217         temp_dir_len = temp_dir.len;
218
219         strbuf_addstr(&buf, rsync_url(transport->url));
220         strbuf_addstr(&buf, "/refs");
221
222         rsync.argv = args;
223         rsync.stdout_to_stderr = 1;
224         args[0] = "rsync";
225         args[1] = (transport->verbose > 1) ? "-rv" : "-r";
226         args[2] = buf.buf;
227         args[3] = temp_dir.buf;
228         args[4] = NULL;
229
230         if (run_command(&rsync))
231                 die ("Could not run rsync to get refs");
232
233         strbuf_reset(&buf);
234         strbuf_addstr(&buf, rsync_url(transport->url));
235         strbuf_addstr(&buf, "/packed-refs");
236
237         args[2] = buf.buf;
238
239         if (run_command(&rsync))
240                 die ("Could not run rsync to get refs");
241
242         /* read the copied refs */
243
244         strbuf_addstr(&temp_dir, "/refs");
245         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
246         strbuf_setlen(&temp_dir, temp_dir_len);
247
248         tail = &dummy;
249         strbuf_addstr(&temp_dir, "/packed-refs");
250         insert_packed_refs(temp_dir.buf, &tail);
251         strbuf_setlen(&temp_dir, temp_dir_len);
252
253         if (remove_dir_recursively(&temp_dir, 0))
254                 warning ("Error removing temporary directory %s.",
255                                 temp_dir.buf);
256
257         strbuf_release(&buf);
258         strbuf_release(&temp_dir);
259
260         return dummy.next;
261 }
262
263 static int fetch_objs_via_rsync(struct transport *transport,
264                                 int nr_objs, struct ref **to_fetch)
265 {
266         struct child_process rsync = CHILD_PROCESS_INIT;
267
268         rsync.stdout_to_stderr = 1;
269         argv_array_push(&rsync.args, "rsync");
270         argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
271         argv_array_push(&rsync.args, "--ignore-existing");
272         argv_array_push(&rsync.args, "--exclude");
273         argv_array_push(&rsync.args, "info");
274         argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
275         argv_array_push(&rsync.args, get_object_directory());
276
277         /* NEEDSWORK: handle one level of alternates */
278         return run_command(&rsync);
279 }
280
281 static int write_one_ref(const char *name, const struct object_id *oid,
282                          int flags, void *data)
283 {
284         struct strbuf *buf = data;
285         int len = buf->len;
286
287         /* when called via for_each_ref(), flags is non-zero */
288         if (flags && !starts_with(name, "refs/heads/") &&
289                         !starts_with(name, "refs/tags/"))
290                 return 0;
291
292         strbuf_addstr(buf, name);
293         if (safe_create_leading_directories(buf->buf) ||
294             write_file(buf->buf, 0, "%s\n", oid_to_hex(oid)))
295                 return error("problems writing temporary file %s: %s",
296                              buf->buf, strerror(errno));
297         strbuf_setlen(buf, len);
298         return 0;
299 }
300
301 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
302                                   int refspec_nr, const char **refspec)
303 {
304         int i;
305
306         for (i = 0; i < refspec_nr; i++) {
307                 struct object_id oid;
308                 char *ref;
309
310                 if (dwim_ref(refspec[i], strlen(refspec[i]), oid.hash, &ref) != 1)
311                         return error("Could not get ref %s", refspec[i]);
312
313                 if (write_one_ref(ref, &oid, 0, temp_dir)) {
314                         free(ref);
315                         return -1;
316                 }
317                 free(ref);
318         }
319         return 0;
320 }
321
322 static int rsync_transport_push(struct transport *transport,
323                 int refspec_nr, const char **refspec, int flags)
324 {
325         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
326         int result = 0, i;
327         struct child_process rsync = CHILD_PROCESS_INIT;
328         const char *args[10];
329
330         if (flags & TRANSPORT_PUSH_MIRROR)
331                 return error("rsync transport does not support mirror mode");
332
333         /* first push the objects */
334
335         strbuf_addstr(&buf, rsync_url(transport->url));
336         strbuf_addch(&buf, '/');
337
338         rsync.argv = args;
339         rsync.stdout_to_stderr = 1;
340         i = 0;
341         args[i++] = "rsync";
342         args[i++] = "-a";
343         if (flags & TRANSPORT_PUSH_DRY_RUN)
344                 args[i++] = "--dry-run";
345         if (transport->verbose > 1)
346                 args[i++] = "-v";
347         args[i++] = "--ignore-existing";
348         args[i++] = "--exclude";
349         args[i++] = "info";
350         args[i++] = get_object_directory();
351         args[i++] = buf.buf;
352         args[i++] = NULL;
353
354         if (run_command(&rsync))
355                 return error("Could not push objects to %s",
356                                 rsync_url(transport->url));
357
358         /* copy the refs to the temporary directory; they could be packed. */
359
360         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
361         if (!mkdtemp(temp_dir.buf))
362                 die_errno ("Could not make temporary directory");
363         strbuf_addch(&temp_dir, '/');
364
365         if (flags & TRANSPORT_PUSH_ALL) {
366                 if (for_each_ref(write_one_ref, &temp_dir))
367                         return -1;
368         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
369                 return -1;
370
371         i = 2;
372         if (flags & TRANSPORT_PUSH_DRY_RUN)
373                 args[i++] = "--dry-run";
374         if (!(flags & TRANSPORT_PUSH_FORCE))
375                 args[i++] = "--ignore-existing";
376         args[i++] = temp_dir.buf;
377         args[i++] = rsync_url(transport->url);
378         args[i++] = NULL;
379         if (run_command(&rsync))
380                 result = error("Could not push to %s",
381                                 rsync_url(transport->url));
382
383         if (remove_dir_recursively(&temp_dir, 0))
384                 warning ("Could not remove temporary directory %s.",
385                                 temp_dir.buf);
386
387         strbuf_release(&buf);
388         strbuf_release(&temp_dir);
389
390         return result;
391 }
392
393 struct bundle_transport_data {
394         int fd;
395         struct bundle_header header;
396 };
397
398 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
399 {
400         struct bundle_transport_data *data = transport->data;
401         struct ref *result = NULL;
402         int i;
403
404         if (for_push)
405                 return NULL;
406
407         if (data->fd > 0)
408                 close(data->fd);
409         data->fd = read_bundle_header(transport->url, &data->header);
410         if (data->fd < 0)
411                 die ("Could not read bundle '%s'.", transport->url);
412         for (i = 0; i < data->header.references.nr; i++) {
413                 struct ref_list_entry *e = data->header.references.list + i;
414                 struct ref *ref = alloc_ref(e->name);
415                 hashcpy(ref->old_sha1, e->sha1);
416                 ref->next = result;
417                 result = ref;
418         }
419         return result;
420 }
421
422 static int fetch_refs_from_bundle(struct transport *transport,
423                                int nr_heads, struct ref **to_fetch)
424 {
425         struct bundle_transport_data *data = transport->data;
426         return unbundle(&data->header, data->fd,
427                         transport->progress ? BUNDLE_VERBOSE : 0);
428 }
429
430 static int close_bundle(struct transport *transport)
431 {
432         struct bundle_transport_data *data = transport->data;
433         if (data->fd > 0)
434                 close(data->fd);
435         free(data);
436         return 0;
437 }
438
439 struct git_transport_data {
440         struct git_transport_options options;
441         struct child_process *conn;
442         int fd[2];
443         unsigned got_remote_heads : 1;
444         struct sha1_array extra_have;
445         struct sha1_array shallow;
446 };
447
448 static int set_git_option(struct git_transport_options *opts,
449                           const char *name, const char *value)
450 {
451         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
452                 opts->uploadpack = value;
453                 return 0;
454         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
455                 opts->receivepack = value;
456                 return 0;
457         } else if (!strcmp(name, TRANS_OPT_THIN)) {
458                 opts->thin = !!value;
459                 return 0;
460         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
461                 opts->followtags = !!value;
462                 return 0;
463         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
464                 opts->keep = !!value;
465                 return 0;
466         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
467                 opts->update_shallow = !!value;
468                 return 0;
469         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
470                 if (!value)
471                         opts->depth = 0;
472                 else {
473                         char *end;
474                         opts->depth = strtol(value, &end, 0);
475                         if (*end)
476                                 die("transport: invalid depth option '%s'", value);
477                 }
478                 return 0;
479         } else if (!strcmp(name, TRANS_OPT_PUSH_CERT)) {
480                 opts->push_cert = !!value;
481                 return 0;
482         }
483         return 1;
484 }
485
486 static int connect_setup(struct transport *transport, int for_push, int verbose)
487 {
488         struct git_transport_data *data = transport->data;
489
490         if (data->conn)
491                 return 0;
492
493         data->conn = git_connect(data->fd, transport->url,
494                                  for_push ? data->options.receivepack :
495                                  data->options.uploadpack,
496                                  verbose ? CONNECT_VERBOSE : 0);
497
498         return 0;
499 }
500
501 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
502 {
503         struct git_transport_data *data = transport->data;
504         struct ref *refs;
505
506         connect_setup(transport, for_push, 0);
507         get_remote_heads(data->fd[0], NULL, 0, &refs,
508                          for_push ? REF_NORMAL : 0,
509                          &data->extra_have,
510                          &data->shallow);
511         data->got_remote_heads = 1;
512
513         return refs;
514 }
515
516 static int fetch_refs_via_pack(struct transport *transport,
517                                int nr_heads, struct ref **to_fetch)
518 {
519         struct git_transport_data *data = transport->data;
520         struct ref *refs;
521         char *dest = xstrdup(transport->url);
522         struct fetch_pack_args args;
523         struct ref *refs_tmp = NULL;
524
525         memset(&args, 0, sizeof(args));
526         args.uploadpack = data->options.uploadpack;
527         args.keep_pack = data->options.keep;
528         args.lock_pack = 1;
529         args.use_thin_pack = data->options.thin;
530         args.include_tag = data->options.followtags;
531         args.verbose = (transport->verbose > 1);
532         args.quiet = (transport->verbose < 0);
533         args.no_progress = !transport->progress;
534         args.depth = data->options.depth;
535         args.check_self_contained_and_connected =
536                 data->options.check_self_contained_and_connected;
537         args.cloning = transport->cloning;
538         args.update_shallow = data->options.update_shallow;
539
540         if (!data->got_remote_heads) {
541                 connect_setup(transport, 0, 0);
542                 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
543                                  NULL, &data->shallow);
544                 data->got_remote_heads = 1;
545         }
546
547         refs = fetch_pack(&args, data->fd, data->conn,
548                           refs_tmp ? refs_tmp : transport->remote_refs,
549                           dest, to_fetch, nr_heads, &data->shallow,
550                           &transport->pack_lockfile);
551         close(data->fd[0]);
552         close(data->fd[1]);
553         if (finish_connect(data->conn)) {
554                 free_refs(refs);
555                 refs = NULL;
556         }
557         data->conn = NULL;
558         data->got_remote_heads = 0;
559         data->options.self_contained_and_connected =
560                 args.self_contained_and_connected;
561
562         free_refs(refs_tmp);
563         free_refs(refs);
564         free(dest);
565         return (refs ? 0 : -1);
566 }
567
568 static int push_had_errors(struct ref *ref)
569 {
570         for (; ref; ref = ref->next) {
571                 switch (ref->status) {
572                 case REF_STATUS_NONE:
573                 case REF_STATUS_UPTODATE:
574                 case REF_STATUS_OK:
575                         break;
576                 default:
577                         return 1;
578                 }
579         }
580         return 0;
581 }
582
583 int transport_refs_pushed(struct ref *ref)
584 {
585         for (; ref; ref = ref->next) {
586                 switch(ref->status) {
587                 case REF_STATUS_NONE:
588                 case REF_STATUS_UPTODATE:
589                         break;
590                 default:
591                         return 1;
592                 }
593         }
594         return 0;
595 }
596
597 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
598 {
599         struct refspec rs;
600
601         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
602                 return;
603
604         rs.src = ref->name;
605         rs.dst = NULL;
606
607         if (!remote_find_tracking(remote, &rs)) {
608                 if (verbose)
609                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
610                 if (ref->deletion) {
611                         delete_ref(rs.dst, NULL, 0);
612                 } else
613                         update_ref("update by push", rs.dst,
614                                         ref->new_sha1, NULL, 0, 0);
615                 free(rs.dst);
616         }
617 }
618
619 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
620 {
621         if (porcelain) {
622                 if (from)
623                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
624                 else
625                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
626                 if (msg)
627                         fprintf(stdout, "%s (%s)\n", summary, msg);
628                 else
629                         fprintf(stdout, "%s\n", summary);
630         } else {
631                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
632                 if (from)
633                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
634                 else
635                         fputs(prettify_refname(to->name), stderr);
636                 if (msg) {
637                         fputs(" (", stderr);
638                         fputs(msg, stderr);
639                         fputc(')', stderr);
640                 }
641                 fputc('\n', stderr);
642         }
643 }
644
645 static const char *status_abbrev(unsigned char sha1[20])
646 {
647         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
648 }
649
650 static void print_ok_ref_status(struct ref *ref, int porcelain)
651 {
652         if (ref->deletion)
653                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
654         else if (is_null_sha1(ref->old_sha1))
655                 print_ref_status('*',
656                         (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
657                         "[new branch]"),
658                         ref, ref->peer_ref, NULL, porcelain);
659         else {
660                 char quickref[84];
661                 char type;
662                 const char *msg;
663
664                 strcpy(quickref, status_abbrev(ref->old_sha1));
665                 if (ref->forced_update) {
666                         strcat(quickref, "...");
667                         type = '+';
668                         msg = "forced update";
669                 } else {
670                         strcat(quickref, "..");
671                         type = ' ';
672                         msg = NULL;
673                 }
674                 strcat(quickref, status_abbrev(ref->new_sha1));
675
676                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
677         }
678 }
679
680 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
681 {
682         if (!count)
683                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
684
685         switch(ref->status) {
686         case REF_STATUS_NONE:
687                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
688                 break;
689         case REF_STATUS_REJECT_NODELETE:
690                 print_ref_status('!', "[rejected]", ref, NULL,
691                                                  "remote does not support deleting refs", porcelain);
692                 break;
693         case REF_STATUS_UPTODATE:
694                 print_ref_status('=', "[up to date]", ref,
695                                                  ref->peer_ref, NULL, porcelain);
696                 break;
697         case REF_STATUS_REJECT_NONFASTFORWARD:
698                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
699                                                  "non-fast-forward", porcelain);
700                 break;
701         case REF_STATUS_REJECT_ALREADY_EXISTS:
702                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
703                                                  "already exists", porcelain);
704                 break;
705         case REF_STATUS_REJECT_FETCH_FIRST:
706                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
707                                                  "fetch first", porcelain);
708                 break;
709         case REF_STATUS_REJECT_NEEDS_FORCE:
710                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
711                                                  "needs force", porcelain);
712                 break;
713         case REF_STATUS_REJECT_STALE:
714                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
715                                                  "stale info", porcelain);
716                 break;
717         case REF_STATUS_REJECT_SHALLOW:
718                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
719                                                  "new shallow roots not allowed", porcelain);
720                 break;
721         case REF_STATUS_REMOTE_REJECT:
722                 print_ref_status('!', "[remote rejected]", ref,
723                                                  ref->deletion ? NULL : ref->peer_ref,
724                                                  ref->remote_status, porcelain);
725                 break;
726         case REF_STATUS_EXPECTING_REPORT:
727                 print_ref_status('!', "[remote failure]", ref,
728                                                  ref->deletion ? NULL : ref->peer_ref,
729                                                  "remote failed to report status", porcelain);
730                 break;
731         case REF_STATUS_ATOMIC_PUSH_FAILED:
732                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
733                                                  "atomic push failed", porcelain);
734                 break;
735         case REF_STATUS_OK:
736                 print_ok_ref_status(ref, porcelain);
737                 break;
738         }
739
740         return 1;
741 }
742
743 void transport_print_push_status(const char *dest, struct ref *refs,
744                                   int verbose, int porcelain, unsigned int *reject_reasons)
745 {
746         struct ref *ref;
747         int n = 0;
748         unsigned char head_sha1[20];
749         char *head;
750
751         head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
752
753         if (verbose) {
754                 for (ref = refs; ref; ref = ref->next)
755                         if (ref->status == REF_STATUS_UPTODATE)
756                                 n += print_one_push_status(ref, dest, n, porcelain);
757         }
758
759         for (ref = refs; ref; ref = ref->next)
760                 if (ref->status == REF_STATUS_OK)
761                         n += print_one_push_status(ref, dest, n, porcelain);
762
763         *reject_reasons = 0;
764         for (ref = refs; ref; ref = ref->next) {
765                 if (ref->status != REF_STATUS_NONE &&
766                     ref->status != REF_STATUS_UPTODATE &&
767                     ref->status != REF_STATUS_OK)
768                         n += print_one_push_status(ref, dest, n, porcelain);
769                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
770                         if (head != NULL && !strcmp(head, ref->name))
771                                 *reject_reasons |= REJECT_NON_FF_HEAD;
772                         else
773                                 *reject_reasons |= REJECT_NON_FF_OTHER;
774                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
775                         *reject_reasons |= REJECT_ALREADY_EXISTS;
776                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
777                         *reject_reasons |= REJECT_FETCH_FIRST;
778                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
779                         *reject_reasons |= REJECT_NEEDS_FORCE;
780                 }
781         }
782         free(head);
783 }
784
785 void transport_verify_remote_names(int nr_heads, const char **heads)
786 {
787         int i;
788
789         for (i = 0; i < nr_heads; i++) {
790                 const char *local = heads[i];
791                 const char *remote = strrchr(heads[i], ':');
792
793                 if (*local == '+')
794                         local++;
795
796                 /* A matching refspec is okay.  */
797                 if (remote == local && remote[1] == '\0')
798                         continue;
799
800                 remote = remote ? (remote + 1) : local;
801                 if (check_refname_format(remote,
802                                 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
803                         die("remote part of refspec is not a valid name in %s",
804                                 heads[i]);
805         }
806 }
807
808 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
809 {
810         struct git_transport_data *data = transport->data;
811         struct send_pack_args args;
812         int ret;
813
814         if (!data->got_remote_heads) {
815                 struct ref *tmp_refs;
816                 connect_setup(transport, 1, 0);
817
818                 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
819                                  NULL, &data->shallow);
820                 data->got_remote_heads = 1;
821         }
822
823         memset(&args, 0, sizeof(args));
824         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
825         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
826         args.use_thin_pack = data->options.thin;
827         args.verbose = (transport->verbose > 0);
828         args.quiet = (transport->verbose < 0);
829         args.progress = transport->progress;
830         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
831         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
832         args.push_cert = !!(flags & TRANSPORT_PUSH_CERT);
833         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
834         args.url = transport->url;
835
836         ret = send_pack(&args, data->fd, data->conn, remote_refs,
837                         &data->extra_have);
838
839         close(data->fd[1]);
840         close(data->fd[0]);
841         ret |= finish_connect(data->conn);
842         data->conn = NULL;
843         data->got_remote_heads = 0;
844
845         return ret;
846 }
847
848 static int connect_git(struct transport *transport, const char *name,
849                        const char *executable, int fd[2])
850 {
851         struct git_transport_data *data = transport->data;
852         data->conn = git_connect(data->fd, transport->url,
853                                  executable, 0);
854         fd[0] = data->fd[0];
855         fd[1] = data->fd[1];
856         return 0;
857 }
858
859 static int disconnect_git(struct transport *transport)
860 {
861         struct git_transport_data *data = transport->data;
862         if (data->conn) {
863                 if (data->got_remote_heads)
864                         packet_flush(data->fd[1]);
865                 close(data->fd[0]);
866                 close(data->fd[1]);
867                 finish_connect(data->conn);
868         }
869
870         free(data);
871         return 0;
872 }
873
874 void transport_take_over(struct transport *transport,
875                          struct child_process *child)
876 {
877         struct git_transport_data *data;
878
879         if (!transport->smart_options)
880                 die("Bug detected: Taking over transport requires non-NULL "
881                     "smart_options field.");
882
883         data = xcalloc(1, sizeof(*data));
884         data->options = *transport->smart_options;
885         data->conn = child;
886         data->fd[0] = data->conn->out;
887         data->fd[1] = data->conn->in;
888         data->got_remote_heads = 0;
889         transport->data = data;
890
891         transport->set_option = NULL;
892         transport->get_refs_list = get_refs_via_connect;
893         transport->fetch = fetch_refs_via_pack;
894         transport->push = NULL;
895         transport->push_refs = git_transport_push;
896         transport->disconnect = disconnect_git;
897         transport->smart_options = &(data->options);
898
899         transport->cannot_reuse = 1;
900 }
901
902 static int is_file(const char *url)
903 {
904         struct stat buf;
905         if (stat(url, &buf))
906                 return 0;
907         return S_ISREG(buf.st_mode);
908 }
909
910 static int external_specification_len(const char *url)
911 {
912         return strchr(url, ':') - url;
913 }
914
915 struct transport *transport_get(struct remote *remote, const char *url)
916 {
917         const char *helper;
918         struct transport *ret = xcalloc(1, sizeof(*ret));
919
920         ret->progress = isatty(2);
921
922         if (!remote)
923                 die("No remote provided to transport_get()");
924
925         ret->got_remote_refs = 0;
926         ret->remote = remote;
927         helper = remote->foreign_vcs;
928
929         if (!url && remote->url)
930                 url = remote->url[0];
931         ret->url = url;
932
933         /* maybe it is a foreign URL? */
934         if (url) {
935                 const char *p = url;
936
937                 while (is_urlschemechar(p == url, *p))
938                         p++;
939                 if (starts_with(p, "::"))
940                         helper = xstrndup(url, p - url);
941         }
942
943         if (helper) {
944                 transport_helper_init(ret, helper);
945         } else if (starts_with(url, "rsync:")) {
946                 ret->get_refs_list = get_refs_via_rsync;
947                 ret->fetch = fetch_objs_via_rsync;
948                 ret->push = rsync_transport_push;
949                 ret->smart_options = NULL;
950         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
951                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
952                 ret->data = data;
953                 ret->get_refs_list = get_refs_from_bundle;
954                 ret->fetch = fetch_refs_from_bundle;
955                 ret->disconnect = close_bundle;
956                 ret->smart_options = NULL;
957         } else if (!is_url(url)
958                 || starts_with(url, "file://")
959                 || starts_with(url, "git://")
960                 || starts_with(url, "ssh://")
961                 || starts_with(url, "git+ssh://")
962                 || starts_with(url, "ssh+git://")) {
963                 /* These are builtin smart transports. */
964                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
965                 ret->data = data;
966                 ret->set_option = NULL;
967                 ret->get_refs_list = get_refs_via_connect;
968                 ret->fetch = fetch_refs_via_pack;
969                 ret->push_refs = git_transport_push;
970                 ret->connect = connect_git;
971                 ret->disconnect = disconnect_git;
972                 ret->smart_options = &(data->options);
973
974                 data->conn = NULL;
975                 data->got_remote_heads = 0;
976         } else {
977                 /* Unknown protocol in URL. Pass to external handler. */
978                 int len = external_specification_len(url);
979                 char *handler = xmemdupz(url, len);
980                 transport_helper_init(ret, handler);
981         }
982
983         if (ret->smart_options) {
984                 ret->smart_options->thin = 1;
985                 ret->smart_options->uploadpack = "git-upload-pack";
986                 if (remote->uploadpack)
987                         ret->smart_options->uploadpack = remote->uploadpack;
988                 ret->smart_options->receivepack = "git-receive-pack";
989                 if (remote->receivepack)
990                         ret->smart_options->receivepack = remote->receivepack;
991         }
992
993         return ret;
994 }
995
996 int transport_set_option(struct transport *transport,
997                          const char *name, const char *value)
998 {
999         int git_reports = 1, protocol_reports = 1;
1000
1001         if (transport->smart_options)
1002                 git_reports = set_git_option(transport->smart_options,
1003                                              name, value);
1004
1005         if (transport->set_option)
1006                 protocol_reports = transport->set_option(transport, name,
1007                                                         value);
1008
1009         /* If either report is 0, report 0 (success). */
1010         if (!git_reports || !protocol_reports)
1011                 return 0;
1012         /* If either reports -1 (invalid value), report -1. */
1013         if ((git_reports == -1) || (protocol_reports == -1))
1014                 return -1;
1015         /* Otherwise if both report unknown, report unknown. */
1016         return 1;
1017 }
1018
1019 void transport_set_verbosity(struct transport *transport, int verbosity,
1020         int force_progress)
1021 {
1022         if (verbosity >= 1)
1023                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1024         if (verbosity < 0)
1025                 transport->verbose = -1;
1026
1027         /**
1028          * Rules used to determine whether to report progress (processing aborts
1029          * when a rule is satisfied):
1030          *
1031          *   . Report progress, if force_progress is 1 (ie. --progress).
1032          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1033          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1034          *   . Report progress if isatty(2) is 1.
1035          **/
1036         if (force_progress >= 0)
1037                 transport->progress = !!force_progress;
1038         else
1039                 transport->progress = verbosity >= 0 && isatty(2);
1040 }
1041
1042 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1043 {
1044         int i;
1045
1046         fprintf(stderr, "The following submodule paths contain changes that can\n"
1047                         "not be found on any remote:\n");
1048         for (i = 0; i < needs_pushing->nr; i++)
1049                 printf("  %s\n", needs_pushing->items[i].string);
1050         fprintf(stderr, "\nPlease try\n\n"
1051                         "       git push --recurse-submodules=on-demand\n\n"
1052                         "or cd to the path and use\n\n"
1053                         "       git push\n\n"
1054                         "to push them to a remote.\n\n");
1055
1056         string_list_clear(needs_pushing, 0);
1057
1058         die("Aborting.");
1059 }
1060
1061 static int run_pre_push_hook(struct transport *transport,
1062                              struct ref *remote_refs)
1063 {
1064         int ret = 0, x;
1065         struct ref *r;
1066         struct child_process proc = CHILD_PROCESS_INIT;
1067         struct strbuf buf;
1068         const char *argv[4];
1069
1070         if (!(argv[0] = find_hook("pre-push")))
1071                 return 0;
1072
1073         argv[1] = transport->remote->name;
1074         argv[2] = transport->url;
1075         argv[3] = NULL;
1076
1077         proc.argv = argv;
1078         proc.in = -1;
1079
1080         if (start_command(&proc)) {
1081                 finish_command(&proc);
1082                 return -1;
1083         }
1084
1085         strbuf_init(&buf, 256);
1086
1087         for (r = remote_refs; r; r = r->next) {
1088                 if (!r->peer_ref) continue;
1089                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1090                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1091                 if (r->status == REF_STATUS_UPTODATE) continue;
1092
1093                 strbuf_reset(&buf);
1094                 strbuf_addf( &buf, "%s %s %s %s\n",
1095                          r->peer_ref->name, sha1_to_hex(r->new_sha1),
1096                          r->name, sha1_to_hex(r->old_sha1));
1097
1098                 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1099                         ret = -1;
1100                         break;
1101                 }
1102         }
1103
1104         strbuf_release(&buf);
1105
1106         x = close(proc.in);
1107         if (!ret)
1108                 ret = x;
1109
1110         x = finish_command(&proc);
1111         if (!ret)
1112                 ret = x;
1113
1114         return ret;
1115 }
1116
1117 int transport_push(struct transport *transport,
1118                    int refspec_nr, const char **refspec, int flags,
1119                    unsigned int *reject_reasons)
1120 {
1121         *reject_reasons = 0;
1122         transport_verify_remote_names(refspec_nr, refspec);
1123
1124         if (transport->push) {
1125                 /* Maybe FIXME. But no important transport uses this case. */
1126                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1127                         die("This transport does not support using --set-upstream");
1128
1129                 return transport->push(transport, refspec_nr, refspec, flags);
1130         } else if (transport->push_refs) {
1131                 struct ref *remote_refs;
1132                 struct ref *local_refs = get_local_heads();
1133                 int match_flags = MATCH_REFS_NONE;
1134                 int verbose = (transport->verbose > 0);
1135                 int quiet = (transport->verbose < 0);
1136                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1137                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1138                 int push_ret, ret, err;
1139
1140                 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1141                         return -1;
1142
1143                 remote_refs = transport->get_refs_list(transport, 1);
1144
1145                 if (flags & TRANSPORT_PUSH_ALL)
1146                         match_flags |= MATCH_REFS_ALL;
1147                 if (flags & TRANSPORT_PUSH_MIRROR)
1148                         match_flags |= MATCH_REFS_MIRROR;
1149                 if (flags & TRANSPORT_PUSH_PRUNE)
1150                         match_flags |= MATCH_REFS_PRUNE;
1151                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1152                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1153
1154                 if (match_push_refs(local_refs, &remote_refs,
1155                                     refspec_nr, refspec, match_flags)) {
1156                         return -1;
1157                 }
1158
1159                 if (transport->smart_options &&
1160                     transport->smart_options->cas &&
1161                     !is_empty_cas(transport->smart_options->cas))
1162                         apply_push_cas(transport->smart_options->cas,
1163                                        transport->remote, remote_refs);
1164
1165                 set_ref_status_for_push(remote_refs,
1166                         flags & TRANSPORT_PUSH_MIRROR,
1167                         flags & TRANSPORT_PUSH_FORCE);
1168
1169                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1170                         if (run_pre_push_hook(transport, remote_refs))
1171                                 return -1;
1172
1173                 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1174                         struct ref *ref = remote_refs;
1175                         for (; ref; ref = ref->next)
1176                                 if (!is_null_sha1(ref->new_sha1) &&
1177                                     !push_unpushed_submodules(ref->new_sha1,
1178                                             transport->remote->name))
1179                                     die ("Failed to push all needed submodules!");
1180                 }
1181
1182                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1183                               TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1184                         struct ref *ref = remote_refs;
1185                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1186
1187                         for (; ref; ref = ref->next)
1188                                 if (!is_null_sha1(ref->new_sha1) &&
1189                                     find_unpushed_submodules(ref->new_sha1,
1190                                             transport->remote->name, &needs_pushing))
1191                                         die_with_unpushed_submodules(&needs_pushing);
1192                 }
1193
1194                 push_ret = transport->push_refs(transport, remote_refs, flags);
1195                 err = push_had_errors(remote_refs);
1196                 ret = push_ret | err;
1197
1198                 if (!quiet || err)
1199                         transport_print_push_status(transport->url, remote_refs,
1200                                         verbose | porcelain, porcelain,
1201                                         reject_reasons);
1202
1203                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1204                         set_upstreams(transport, remote_refs, pretend);
1205
1206                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1207                         struct ref *ref;
1208                         for (ref = remote_refs; ref; ref = ref->next)
1209                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1210                 }
1211
1212                 if (porcelain && !push_ret)
1213                         puts("Done");
1214                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1215                         fprintf(stderr, "Everything up-to-date\n");
1216
1217                 return ret;
1218         }
1219         return 1;
1220 }
1221
1222 const struct ref *transport_get_remote_refs(struct transport *transport)
1223 {
1224         if (!transport->got_remote_refs) {
1225                 transport->remote_refs = transport->get_refs_list(transport, 0);
1226                 transport->got_remote_refs = 1;
1227         }
1228
1229         return transport->remote_refs;
1230 }
1231
1232 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1233 {
1234         int rc;
1235         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1236         struct ref **heads = NULL;
1237         struct ref *rm;
1238
1239         for (rm = refs; rm; rm = rm->next) {
1240                 nr_refs++;
1241                 if (rm->peer_ref &&
1242                     !is_null_sha1(rm->old_sha1) &&
1243                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1244                         continue;
1245                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1246                 heads[nr_heads++] = rm;
1247         }
1248
1249         if (!nr_heads) {
1250                 /*
1251                  * When deepening of a shallow repository is requested,
1252                  * then local and remote refs are likely to still be equal.
1253                  * Just feed them all to the fetch method in that case.
1254                  * This condition shouldn't be met in a non-deepening fetch
1255                  * (see builtin/fetch.c:quickfetch()).
1256                  */
1257                 heads = xmalloc(nr_refs * sizeof(*heads));
1258                 for (rm = refs; rm; rm = rm->next)
1259                         heads[nr_heads++] = rm;
1260         }
1261
1262         rc = transport->fetch(transport, nr_heads, heads);
1263
1264         free(heads);
1265         return rc;
1266 }
1267
1268 void transport_unlock_pack(struct transport *transport)
1269 {
1270         if (transport->pack_lockfile) {
1271                 unlink_or_warn(transport->pack_lockfile);
1272                 free(transport->pack_lockfile);
1273                 transport->pack_lockfile = NULL;
1274         }
1275 }
1276
1277 int transport_connect(struct transport *transport, const char *name,
1278                       const char *exec, int fd[2])
1279 {
1280         if (transport->connect)
1281                 return transport->connect(transport, name, exec, fd);
1282         else
1283                 die("Operation not supported by protocol");
1284 }
1285
1286 int transport_disconnect(struct transport *transport)
1287 {
1288         int ret = 0;
1289         if (transport->disconnect)
1290                 ret = transport->disconnect(transport);
1291         free(transport);
1292         return ret;
1293 }
1294
1295 /*
1296  * Strip username (and password) from a URL and return
1297  * it in a newly allocated string.
1298  */
1299 char *transport_anonymize_url(const char *url)
1300 {
1301         char *anon_url, *scheme_prefix, *anon_part;
1302         size_t anon_len, prefix_len = 0;
1303
1304         anon_part = strchr(url, '@');
1305         if (url_is_local_not_ssh(url) || !anon_part)
1306                 goto literal_copy;
1307
1308         anon_len = strlen(++anon_part);
1309         scheme_prefix = strstr(url, "://");
1310         if (!scheme_prefix) {
1311                 if (!strchr(anon_part, ':'))
1312                         /* cannot be "me@there:/path/name" */
1313                         goto literal_copy;
1314         } else {
1315                 const char *cp;
1316                 /* make sure scheme is reasonable */
1317                 for (cp = url; cp < scheme_prefix; cp++) {
1318                         switch (*cp) {
1319                                 /* RFC 1738 2.1 */
1320                         case '+': case '.': case '-':
1321                                 break; /* ok */
1322                         default:
1323                                 if (isalnum(*cp))
1324                                         break;
1325                                 /* it isn't */
1326                                 goto literal_copy;
1327                         }
1328                 }
1329                 /* @ past the first slash does not count */
1330                 cp = strchr(scheme_prefix + 3, '/');
1331                 if (cp && cp < anon_part)
1332                         goto literal_copy;
1333                 prefix_len = scheme_prefix - url + 3;
1334         }
1335         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1336         memcpy(anon_url, url, prefix_len);
1337         memcpy(anon_url + prefix_len, anon_part, anon_len);
1338         return anon_url;
1339 literal_copy:
1340         return xstrdup(url);
1341 }
1342
1343 struct alternate_refs_data {
1344         alternate_ref_fn *fn;
1345         void *data;
1346 };
1347
1348 static int refs_from_alternate_cb(struct alternate_object_database *e,
1349                                   void *data)
1350 {
1351         char *other;
1352         size_t len;
1353         struct remote *remote;
1354         struct transport *transport;
1355         const struct ref *extra;
1356         struct alternate_refs_data *cb = data;
1357
1358         e->name[-1] = '\0';
1359         other = xstrdup(real_path(e->base));
1360         e->name[-1] = '/';
1361         len = strlen(other);
1362
1363         while (other[len-1] == '/')
1364                 other[--len] = '\0';
1365         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1366                 goto out;
1367         /* Is this a git repository with refs? */
1368         memcpy(other + len - 8, "/refs", 6);
1369         if (!is_directory(other))
1370                 goto out;
1371         other[len - 8] = '\0';
1372         remote = remote_get(other);
1373         transport = transport_get(remote, other);
1374         for (extra = transport_get_remote_refs(transport);
1375              extra;
1376              extra = extra->next)
1377                 cb->fn(extra, cb->data);
1378         transport_disconnect(transport);
1379 out:
1380         free(other);
1381         return 0;
1382 }
1383
1384 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1385 {
1386         struct alternate_refs_data cb;
1387         cb.fn = fn;
1388         cb.data = data;
1389         foreach_alt_odb(refs_from_alternate_cb, &cb);
1390 }