Merge branch 'js/i18n-scripts'
[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 "send-pack.h"
7 #include "walker.h"
8 #include "bundle.h"
9 #include "dir.h"
10 #include "refs.h"
11 #include "branch.h"
12 #include "url.h"
13
14 /* rsync support */
15
16 /*
17  * We copy packed-refs and refs/ into a temporary file, then read the
18  * loose refs recursively (sorting whenever possible), and then inserting
19  * those packed refs that are not yet in the list (not validating, but
20  * assuming that the file is sorted).
21  *
22  * Appears refactoring this from refs.c is too cumbersome.
23  */
24
25 static int str_cmp(const void *a, const void *b)
26 {
27         const char *s1 = a;
28         const char *s2 = b;
29
30         return strcmp(s1, s2);
31 }
32
33 /* path->buf + name_offset is expected to point to "refs/" */
34
35 static int read_loose_refs(struct strbuf *path, int name_offset,
36                 struct ref **tail)
37 {
38         DIR *dir = opendir(path->buf);
39         struct dirent *de;
40         struct {
41                 char **entries;
42                 int nr, alloc;
43         } list;
44         int i, pathlen;
45
46         if (!dir)
47                 return -1;
48
49         memset (&list, 0, sizeof(list));
50
51         while ((de = readdir(dir))) {
52                 if (is_dot_or_dotdot(de->d_name))
53                         continue;
54                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
55                 list.entries[list.nr++] = xstrdup(de->d_name);
56         }
57         closedir(dir);
58
59         /* sort the list */
60
61         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
62
63         pathlen = path->len;
64         strbuf_addch(path, '/');
65
66         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
67                 strbuf_addstr(path, list.entries[i]);
68                 if (read_loose_refs(path, name_offset, tail)) {
69                         int fd = open(path->buf, O_RDONLY);
70                         char buffer[40];
71                         struct ref *next;
72
73                         if (fd < 0)
74                                 continue;
75                         next = alloc_ref(path->buf + name_offset);
76                         if (read_in_full(fd, buffer, 40) != 40 ||
77                                         get_sha1_hex(buffer, next->old_sha1)) {
78                                 close(fd);
79                                 free(next);
80                                 continue;
81                         }
82                         close(fd);
83                         (*tail)->next = next;
84                         *tail = next;
85                 }
86         }
87         strbuf_setlen(path, pathlen);
88
89         for (i = 0; i < list.nr; i++)
90                 free(list.entries[i]);
91         free(list.entries);
92
93         return 0;
94 }
95
96 /* insert the packed refs for which no loose refs were found */
97
98 static void insert_packed_refs(const char *packed_refs, struct ref **list)
99 {
100         FILE *f = fopen(packed_refs, "r");
101         static char buffer[PATH_MAX];
102
103         if (!f)
104                 return;
105
106         for (;;) {
107                 int cmp = cmp, len;
108
109                 if (!fgets(buffer, sizeof(buffer), f)) {
110                         fclose(f);
111                         return;
112                 }
113
114                 if (hexval(buffer[0]) > 0xf)
115                         continue;
116                 len = strlen(buffer);
117                 if (len && buffer[len - 1] == '\n')
118                         buffer[--len] = '\0';
119                 if (len < 41)
120                         continue;
121                 while ((*list)->next &&
122                                 (cmp = strcmp(buffer + 41,
123                                       (*list)->next->name)) > 0)
124                         list = &(*list)->next;
125                 if (!(*list)->next || cmp < 0) {
126                         struct ref *next = alloc_ref(buffer + 41);
127                         buffer[40] = '\0';
128                         if (get_sha1_hex(buffer, next->old_sha1)) {
129                                 warning ("invalid SHA-1: %s", buffer);
130                                 free(next);
131                                 continue;
132                         }
133                         next->next = (*list)->next;
134                         (*list)->next = next;
135                         list = &(*list)->next;
136                 }
137         }
138 }
139
140 static void set_upstreams(struct transport *transport, struct ref *refs,
141         int pretend)
142 {
143         struct ref *ref;
144         for (ref = refs; ref; ref = ref->next) {
145                 const char *localname;
146                 const char *tmp;
147                 const char *remotename;
148                 unsigned char sha[20];
149                 int flag = 0;
150                 /*
151                  * Check suitability for tracking. Must be successful /
152                  * already up-to-date ref create/modify (not delete).
153                  */
154                 if (ref->status != REF_STATUS_OK &&
155                         ref->status != REF_STATUS_UPTODATE)
156                         continue;
157                 if (!ref->peer_ref)
158                         continue;
159                 if (is_null_sha1(ref->new_sha1))
160                         continue;
161
162                 /* Follow symbolic refs (mainly for HEAD). */
163                 localname = ref->peer_ref->name;
164                 remotename = ref->name;
165                 tmp = resolve_ref(localname, sha, 1, &flag);
166                 if (tmp && flag & REF_ISSYMREF &&
167                         !prefixcmp(tmp, "refs/heads/"))
168                         localname = tmp;
169
170                 /* Both source and destination must be local branches. */
171                 if (!localname || prefixcmp(localname, "refs/heads/"))
172                         continue;
173                 if (!remotename || prefixcmp(remotename, "refs/heads/"))
174                         continue;
175
176                 if (!pretend)
177                         install_branch_config(BRANCH_CONFIG_VERBOSE,
178                                 localname + 11, transport->remote->name,
179                                 remotename);
180                 else
181                         printf("Would set upstream of '%s' to '%s' of '%s'\n",
182                                 localname + 11, remotename + 11,
183                                 transport->remote->name);
184         }
185 }
186
187 static const char *rsync_url(const char *url)
188 {
189         return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
190 }
191
192 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
193 {
194         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
195         struct ref dummy = {NULL}, *tail = &dummy;
196         struct child_process rsync;
197         const char *args[5];
198         int temp_dir_len;
199
200         if (for_push)
201                 return NULL;
202
203         /* copy the refs to the temporary directory */
204
205         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
206         if (!mkdtemp(temp_dir.buf))
207                 die_errno ("Could not make temporary directory");
208         temp_dir_len = temp_dir.len;
209
210         strbuf_addstr(&buf, rsync_url(transport->url));
211         strbuf_addstr(&buf, "/refs");
212
213         memset(&rsync, 0, sizeof(rsync));
214         rsync.argv = args;
215         rsync.stdout_to_stderr = 1;
216         args[0] = "rsync";
217         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
218         args[2] = buf.buf;
219         args[3] = temp_dir.buf;
220         args[4] = NULL;
221
222         if (run_command(&rsync))
223                 die ("Could not run rsync to get refs");
224
225         strbuf_reset(&buf);
226         strbuf_addstr(&buf, rsync_url(transport->url));
227         strbuf_addstr(&buf, "/packed-refs");
228
229         args[2] = buf.buf;
230
231         if (run_command(&rsync))
232                 die ("Could not run rsync to get refs");
233
234         /* read the copied refs */
235
236         strbuf_addstr(&temp_dir, "/refs");
237         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
238         strbuf_setlen(&temp_dir, temp_dir_len);
239
240         tail = &dummy;
241         strbuf_addstr(&temp_dir, "/packed-refs");
242         insert_packed_refs(temp_dir.buf, &tail);
243         strbuf_setlen(&temp_dir, temp_dir_len);
244
245         if (remove_dir_recursively(&temp_dir, 0))
246                 warning ("Error removing temporary directory %s.",
247                                 temp_dir.buf);
248
249         strbuf_release(&buf);
250         strbuf_release(&temp_dir);
251
252         return dummy.next;
253 }
254
255 static int fetch_objs_via_rsync(struct transport *transport,
256                                 int nr_objs, struct ref **to_fetch)
257 {
258         struct strbuf buf = STRBUF_INIT;
259         struct child_process rsync;
260         const char *args[8];
261         int result;
262
263         strbuf_addstr(&buf, rsync_url(transport->url));
264         strbuf_addstr(&buf, "/objects/");
265
266         memset(&rsync, 0, sizeof(rsync));
267         rsync.argv = args;
268         rsync.stdout_to_stderr = 1;
269         args[0] = "rsync";
270         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
271         args[2] = "--ignore-existing";
272         args[3] = "--exclude";
273         args[4] = "info";
274         args[5] = buf.buf;
275         args[6] = get_object_directory();
276         args[7] = NULL;
277
278         /* NEEDSWORK: handle one level of alternates */
279         result = run_command(&rsync);
280
281         strbuf_release(&buf);
282
283         return result;
284 }
285
286 static int write_one_ref(const char *name, const unsigned char *sha1,
287                 int flags, void *data)
288 {
289         struct strbuf *buf = data;
290         int len = buf->len;
291         FILE *f;
292
293         /* when called via for_each_ref(), flags is non-zero */
294         if (flags && prefixcmp(name, "refs/heads/") &&
295                         prefixcmp(name, "refs/tags/"))
296                 return 0;
297
298         strbuf_addstr(buf, name);
299         if (safe_create_leading_directories(buf->buf) ||
300                         !(f = fopen(buf->buf, "w")) ||
301                         fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
302                         fclose(f))
303                 return error("problems writing temporary file %s", buf->buf);
304         strbuf_setlen(buf, len);
305         return 0;
306 }
307
308 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
309                 int refspec_nr, const char **refspec)
310 {
311         int i;
312
313         for (i = 0; i < refspec_nr; i++) {
314                 unsigned char sha1[20];
315                 char *ref;
316
317                 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
318                         return error("Could not get ref %s", refspec[i]);
319
320                 if (write_one_ref(ref, sha1, 0, temp_dir)) {
321                         free(ref);
322                         return -1;
323                 }
324                 free(ref);
325         }
326         return 0;
327 }
328
329 static int rsync_transport_push(struct transport *transport,
330                 int refspec_nr, const char **refspec, int flags)
331 {
332         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
333         int result = 0, i;
334         struct child_process rsync;
335         const char *args[10];
336
337         if (flags & TRANSPORT_PUSH_MIRROR)
338                 return error("rsync transport does not support mirror mode");
339
340         /* first push the objects */
341
342         strbuf_addstr(&buf, rsync_url(transport->url));
343         strbuf_addch(&buf, '/');
344
345         memset(&rsync, 0, sizeof(rsync));
346         rsync.argv = args;
347         rsync.stdout_to_stderr = 1;
348         i = 0;
349         args[i++] = "rsync";
350         args[i++] = "-a";
351         if (flags & TRANSPORT_PUSH_DRY_RUN)
352                 args[i++] = "--dry-run";
353         if (transport->verbose > 0)
354                 args[i++] = "-v";
355         args[i++] = "--ignore-existing";
356         args[i++] = "--exclude";
357         args[i++] = "info";
358         args[i++] = get_object_directory();
359         args[i++] = buf.buf;
360         args[i++] = NULL;
361
362         if (run_command(&rsync))
363                 return error("Could not push objects to %s",
364                                 rsync_url(transport->url));
365
366         /* copy the refs to the temporary directory; they could be packed. */
367
368         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
369         if (!mkdtemp(temp_dir.buf))
370                 die_errno ("Could not make temporary directory");
371         strbuf_addch(&temp_dir, '/');
372
373         if (flags & TRANSPORT_PUSH_ALL) {
374                 if (for_each_ref(write_one_ref, &temp_dir))
375                         return -1;
376         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
377                 return -1;
378
379         i = 2;
380         if (flags & TRANSPORT_PUSH_DRY_RUN)
381                 args[i++] = "--dry-run";
382         if (!(flags & TRANSPORT_PUSH_FORCE))
383                 args[i++] = "--ignore-existing";
384         args[i++] = temp_dir.buf;
385         args[i++] = rsync_url(transport->url);
386         args[i++] = NULL;
387         if (run_command(&rsync))
388                 result = error("Could not push to %s",
389                                 rsync_url(transport->url));
390
391         if (remove_dir_recursively(&temp_dir, 0))
392                 warning ("Could not remove temporary directory %s.",
393                                 temp_dir.buf);
394
395         strbuf_release(&buf);
396         strbuf_release(&temp_dir);
397
398         return result;
399 }
400
401 struct bundle_transport_data {
402         int fd;
403         struct bundle_header header;
404 };
405
406 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
407 {
408         struct bundle_transport_data *data = transport->data;
409         struct ref *result = NULL;
410         int i;
411
412         if (for_push)
413                 return NULL;
414
415         if (data->fd > 0)
416                 close(data->fd);
417         data->fd = read_bundle_header(transport->url, &data->header);
418         if (data->fd < 0)
419                 die ("Could not read bundle '%s'.", transport->url);
420         for (i = 0; i < data->header.references.nr; i++) {
421                 struct ref_list_entry *e = data->header.references.list + i;
422                 struct ref *ref = alloc_ref(e->name);
423                 hashcpy(ref->old_sha1, e->sha1);
424                 ref->next = result;
425                 result = ref;
426         }
427         return result;
428 }
429
430 static int fetch_refs_from_bundle(struct transport *transport,
431                                int nr_heads, struct ref **to_fetch)
432 {
433         struct bundle_transport_data *data = transport->data;
434         return unbundle(&data->header, data->fd);
435 }
436
437 static int close_bundle(struct transport *transport)
438 {
439         struct bundle_transport_data *data = transport->data;
440         if (data->fd > 0)
441                 close(data->fd);
442         free(data);
443         return 0;
444 }
445
446 struct git_transport_data {
447         struct git_transport_options options;
448         struct child_process *conn;
449         int fd[2];
450         unsigned got_remote_heads : 1;
451         struct extra_have_objects extra_have;
452 };
453
454 static int set_git_option(struct git_transport_options *opts,
455                           const char *name, const char *value)
456 {
457         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
458                 opts->uploadpack = value;
459                 return 0;
460         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
461                 opts->receivepack = value;
462                 return 0;
463         } else if (!strcmp(name, TRANS_OPT_THIN)) {
464                 opts->thin = !!value;
465                 return 0;
466         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
467                 opts->followtags = !!value;
468                 return 0;
469         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
470                 opts->keep = !!value;
471                 return 0;
472         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
473                 if (!value)
474                         opts->depth = 0;
475                 else
476                         opts->depth = atoi(value);
477                 return 0;
478         }
479         return 1;
480 }
481
482 static int connect_setup(struct transport *transport, int for_push, int verbose)
483 {
484         struct git_transport_data *data = transport->data;
485         struct strbuf sb = STRBUF_INIT;
486
487         if (data->conn)
488                 return 0;
489
490         strbuf_addstr(&sb, for_push ? data->options.receivepack :
491                                  data->options.uploadpack);
492         if (for_push && transport->verbose < 0)
493                 strbuf_addstr(&sb, " --quiet");
494         data->conn = git_connect(data->fd, transport->url, sb.buf,
495                                  verbose ? CONNECT_VERBOSE : 0);
496         strbuf_release(&sb);
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], &refs, 0, NULL,
508                          for_push ? REF_NORMAL : 0, &data->extra_have);
509         data->got_remote_heads = 1;
510
511         return refs;
512 }
513
514 static int fetch_refs_via_pack(struct transport *transport,
515                                int nr_heads, struct ref **to_fetch)
516 {
517         struct git_transport_data *data = transport->data;
518         char **heads = xmalloc(nr_heads * sizeof(*heads));
519         char **origh = xmalloc(nr_heads * sizeof(*origh));
520         const struct ref *refs;
521         char *dest = xstrdup(transport->url);
522         struct fetch_pack_args args;
523         int i;
524         struct ref *refs_tmp = NULL;
525
526         memset(&args, 0, sizeof(args));
527         args.uploadpack = data->options.uploadpack;
528         args.keep_pack = data->options.keep;
529         args.lock_pack = 1;
530         args.use_thin_pack = data->options.thin;
531         args.include_tag = data->options.followtags;
532         args.verbose = (transport->verbose > 0);
533         args.quiet = (transport->verbose < 0);
534         args.no_progress = !transport->progress;
535         args.depth = data->options.depth;
536
537         for (i = 0; i < nr_heads; i++)
538                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
539
540         if (!data->got_remote_heads) {
541                 connect_setup(transport, 0, 0);
542                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
543                 data->got_remote_heads = 1;
544         }
545
546         refs = fetch_pack(&args, data->fd, data->conn,
547                           refs_tmp ? refs_tmp : transport->remote_refs,
548                           dest, nr_heads, heads, &transport->pack_lockfile);
549         close(data->fd[0]);
550         close(data->fd[1]);
551         if (finish_connect(data->conn))
552                 refs = NULL;
553         data->conn = NULL;
554         data->got_remote_heads = 0;
555
556         free_refs(refs_tmp);
557
558         for (i = 0; i < nr_heads; i++)
559                 free(origh[i]);
560         free(origh);
561         free(heads);
562         free(dest);
563         return (refs ? 0 : -1);
564 }
565
566 static int push_had_errors(struct ref *ref)
567 {
568         for (; ref; ref = ref->next) {
569                 switch (ref->status) {
570                 case REF_STATUS_NONE:
571                 case REF_STATUS_UPTODATE:
572                 case REF_STATUS_OK:
573                         break;
574                 default:
575                         return 1;
576                 }
577         }
578         return 0;
579 }
580
581 int transport_refs_pushed(struct ref *ref)
582 {
583         for (; ref; ref = ref->next) {
584                 switch(ref->status) {
585                 case REF_STATUS_NONE:
586                 case REF_STATUS_UPTODATE:
587                         break;
588                 default:
589                         return 1;
590                 }
591         }
592         return 0;
593 }
594
595 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
596 {
597         struct refspec rs;
598
599         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
600                 return;
601
602         rs.src = ref->name;
603         rs.dst = NULL;
604
605         if (!remote_find_tracking(remote, &rs)) {
606                 if (verbose)
607                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
608                 if (ref->deletion) {
609                         delete_ref(rs.dst, NULL, 0);
610                 } else
611                         update_ref("update by push", rs.dst,
612                                         ref->new_sha1, NULL, 0, 0);
613                 free(rs.dst);
614         }
615 }
616
617 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
618 {
619         if (porcelain) {
620                 if (from)
621                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
622                 else
623                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
624                 if (msg)
625                         fprintf(stdout, "%s (%s)\n", summary, msg);
626                 else
627                         fprintf(stdout, "%s\n", summary);
628         } else {
629                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
630                 if (from)
631                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
632                 else
633                         fputs(prettify_refname(to->name), stderr);
634                 if (msg) {
635                         fputs(" (", stderr);
636                         fputs(msg, stderr);
637                         fputc(')', stderr);
638                 }
639                 fputc('\n', stderr);
640         }
641 }
642
643 static const char *status_abbrev(unsigned char sha1[20])
644 {
645         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
646 }
647
648 static void print_ok_ref_status(struct ref *ref, int porcelain)
649 {
650         if (ref->deletion)
651                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
652         else if (is_null_sha1(ref->old_sha1))
653                 print_ref_status('*',
654                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
655                         "[new branch]"),
656                         ref, ref->peer_ref, NULL, porcelain);
657         else {
658                 char quickref[84];
659                 char type;
660                 const char *msg;
661
662                 strcpy(quickref, status_abbrev(ref->old_sha1));
663                 if (ref->nonfastforward) {
664                         strcat(quickref, "...");
665                         type = '+';
666                         msg = "forced update";
667                 } else {
668                         strcat(quickref, "..");
669                         type = ' ';
670                         msg = NULL;
671                 }
672                 strcat(quickref, status_abbrev(ref->new_sha1));
673
674                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
675         }
676 }
677
678 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
679 {
680         if (!count)
681                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
682
683         switch(ref->status) {
684         case REF_STATUS_NONE:
685                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
686                 break;
687         case REF_STATUS_REJECT_NODELETE:
688                 print_ref_status('!', "[rejected]", ref, NULL,
689                                                  "remote does not support deleting refs", porcelain);
690                 break;
691         case REF_STATUS_UPTODATE:
692                 print_ref_status('=', "[up to date]", ref,
693                                                  ref->peer_ref, NULL, porcelain);
694                 break;
695         case REF_STATUS_REJECT_NONFASTFORWARD:
696                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
697                                                  "non-fast-forward", porcelain);
698                 break;
699         case REF_STATUS_REMOTE_REJECT:
700                 print_ref_status('!', "[remote rejected]", ref,
701                                                  ref->deletion ? NULL : ref->peer_ref,
702                                                  ref->remote_status, porcelain);
703                 break;
704         case REF_STATUS_EXPECTING_REPORT:
705                 print_ref_status('!', "[remote failure]", ref,
706                                                  ref->deletion ? NULL : ref->peer_ref,
707                                                  "remote failed to report status", porcelain);
708                 break;
709         case REF_STATUS_OK:
710                 print_ok_ref_status(ref, porcelain);
711                 break;
712         }
713
714         return 1;
715 }
716
717 void transport_print_push_status(const char *dest, struct ref *refs,
718                                   int verbose, int porcelain, int *nonfastforward)
719 {
720         struct ref *ref;
721         int n = 0;
722
723         if (verbose) {
724                 for (ref = refs; ref; ref = ref->next)
725                         if (ref->status == REF_STATUS_UPTODATE)
726                                 n += print_one_push_status(ref, dest, n, porcelain);
727         }
728
729         for (ref = refs; ref; ref = ref->next)
730                 if (ref->status == REF_STATUS_OK)
731                         n += print_one_push_status(ref, dest, n, porcelain);
732
733         *nonfastforward = 0;
734         for (ref = refs; ref; ref = ref->next) {
735                 if (ref->status != REF_STATUS_NONE &&
736                     ref->status != REF_STATUS_UPTODATE &&
737                     ref->status != REF_STATUS_OK)
738                         n += print_one_push_status(ref, dest, n, porcelain);
739                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
740                         *nonfastforward = 1;
741         }
742 }
743
744 void transport_verify_remote_names(int nr_heads, const char **heads)
745 {
746         int i;
747
748         for (i = 0; i < nr_heads; i++) {
749                 const char *local = heads[i];
750                 const char *remote = strrchr(heads[i], ':');
751
752                 if (*local == '+')
753                         local++;
754
755                 /* A matching refspec is okay.  */
756                 if (remote == local && remote[1] == '\0')
757                         continue;
758
759                 remote = remote ? (remote + 1) : local;
760                 switch (check_ref_format(remote)) {
761                 case 0: /* ok */
762                 case CHECK_REF_FORMAT_ONELEVEL:
763                         /* ok but a single level -- that is fine for
764                          * a match pattern.
765                          */
766                 case CHECK_REF_FORMAT_WILDCARD:
767                         /* ok but ends with a pattern-match character */
768                         continue;
769                 }
770                 die("remote part of refspec is not a valid name in %s",
771                     heads[i]);
772         }
773 }
774
775 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
776 {
777         struct git_transport_data *data = transport->data;
778         struct send_pack_args args;
779         int ret;
780
781         if (!data->got_remote_heads) {
782                 struct ref *tmp_refs;
783                 connect_setup(transport, 1, 0);
784
785                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
786                                  NULL);
787                 data->got_remote_heads = 1;
788         }
789
790         memset(&args, 0, sizeof(args));
791         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
792         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
793         args.use_thin_pack = data->options.thin;
794         args.verbose = (transport->verbose > 0);
795         args.quiet = (transport->verbose < 0);
796         args.progress = transport->progress;
797         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
798         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
799
800         ret = send_pack(&args, data->fd, data->conn, remote_refs,
801                         &data->extra_have);
802
803         close(data->fd[1]);
804         close(data->fd[0]);
805         ret |= finish_connect(data->conn);
806         data->conn = NULL;
807         data->got_remote_heads = 0;
808
809         return ret;
810 }
811
812 static int connect_git(struct transport *transport, const char *name,
813                        const char *executable, int fd[2])
814 {
815         struct git_transport_data *data = transport->data;
816         data->conn = git_connect(data->fd, transport->url,
817                                  executable, 0);
818         fd[0] = data->fd[0];
819         fd[1] = data->fd[1];
820         return 0;
821 }
822
823 static int disconnect_git(struct transport *transport)
824 {
825         struct git_transport_data *data = transport->data;
826         if (data->conn) {
827                 if (data->got_remote_heads)
828                         packet_flush(data->fd[1]);
829                 close(data->fd[0]);
830                 close(data->fd[1]);
831                 finish_connect(data->conn);
832         }
833
834         free(data);
835         return 0;
836 }
837
838 void transport_take_over(struct transport *transport,
839                          struct child_process *child)
840 {
841         struct git_transport_data *data;
842
843         if (!transport->smart_options)
844                 die("Bug detected: Taking over transport requires non-NULL "
845                     "smart_options field.");
846
847         data = xcalloc(1, sizeof(*data));
848         data->options = *transport->smart_options;
849         data->conn = child;
850         data->fd[0] = data->conn->out;
851         data->fd[1] = data->conn->in;
852         data->got_remote_heads = 0;
853         transport->data = data;
854
855         transport->set_option = NULL;
856         transport->get_refs_list = get_refs_via_connect;
857         transport->fetch = fetch_refs_via_pack;
858         transport->push = NULL;
859         transport->push_refs = git_transport_push;
860         transport->disconnect = disconnect_git;
861         transport->smart_options = &(data->options);
862 }
863
864 static int is_local(const char *url)
865 {
866         const char *colon = strchr(url, ':');
867         const char *slash = strchr(url, '/');
868         return !colon || (slash && slash < colon) ||
869                 has_dos_drive_prefix(url);
870 }
871
872 static int is_file(const char *url)
873 {
874         struct stat buf;
875         if (stat(url, &buf))
876                 return 0;
877         return S_ISREG(buf.st_mode);
878 }
879
880 static int external_specification_len(const char *url)
881 {
882         return strchr(url, ':') - url;
883 }
884
885 struct transport *transport_get(struct remote *remote, const char *url)
886 {
887         const char *helper;
888         struct transport *ret = xcalloc(1, sizeof(*ret));
889
890         ret->progress = isatty(2);
891
892         if (!remote)
893                 die("No remote provided to transport_get()");
894
895         ret->got_remote_refs = 0;
896         ret->remote = remote;
897         helper = remote->foreign_vcs;
898
899         if (!url && remote->url)
900                 url = remote->url[0];
901         ret->url = url;
902
903         /* maybe it is a foreign URL? */
904         if (url) {
905                 const char *p = url;
906
907                 while (is_urlschemechar(p == url, *p))
908                         p++;
909                 if (!prefixcmp(p, "::"))
910                         helper = xstrndup(url, p - url);
911         }
912
913         if (helper) {
914                 transport_helper_init(ret, helper);
915         } else if (!prefixcmp(url, "rsync:")) {
916                 ret->get_refs_list = get_refs_via_rsync;
917                 ret->fetch = fetch_objs_via_rsync;
918                 ret->push = rsync_transport_push;
919                 ret->smart_options = NULL;
920         } else if (is_local(url) && is_file(url)) {
921                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
922                 ret->data = data;
923                 ret->get_refs_list = get_refs_from_bundle;
924                 ret->fetch = fetch_refs_from_bundle;
925                 ret->disconnect = close_bundle;
926                 ret->smart_options = NULL;
927         } else if (!is_url(url)
928                 || !prefixcmp(url, "file://")
929                 || !prefixcmp(url, "git://")
930                 || !prefixcmp(url, "ssh://")
931                 || !prefixcmp(url, "git+ssh://")
932                 || !prefixcmp(url, "ssh+git://")) {
933                 /* These are builtin smart transports. */
934                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
935                 ret->data = data;
936                 ret->set_option = NULL;
937                 ret->get_refs_list = get_refs_via_connect;
938                 ret->fetch = fetch_refs_via_pack;
939                 ret->push_refs = git_transport_push;
940                 ret->connect = connect_git;
941                 ret->disconnect = disconnect_git;
942                 ret->smart_options = &(data->options);
943
944                 data->conn = NULL;
945                 data->got_remote_heads = 0;
946         } else {
947                 /* Unknown protocol in URL. Pass to external handler. */
948                 int len = external_specification_len(url);
949                 char *handler = xmalloc(len + 1);
950                 handler[len] = 0;
951                 strncpy(handler, url, len);
952                 transport_helper_init(ret, handler);
953         }
954
955         if (ret->smart_options) {
956                 ret->smart_options->thin = 1;
957                 ret->smart_options->uploadpack = "git-upload-pack";
958                 if (remote->uploadpack)
959                         ret->smart_options->uploadpack = remote->uploadpack;
960                 ret->smart_options->receivepack = "git-receive-pack";
961                 if (remote->receivepack)
962                         ret->smart_options->receivepack = remote->receivepack;
963         }
964
965         return ret;
966 }
967
968 int transport_set_option(struct transport *transport,
969                          const char *name, const char *value)
970 {
971         int git_reports = 1, protocol_reports = 1;
972
973         if (transport->smart_options)
974                 git_reports = set_git_option(transport->smart_options,
975                                              name, value);
976
977         if (transport->set_option)
978                 protocol_reports = transport->set_option(transport, name,
979                                                         value);
980
981         /* If either report is 0, report 0 (success). */
982         if (!git_reports || !protocol_reports)
983                 return 0;
984         /* If either reports -1 (invalid value), report -1. */
985         if ((git_reports == -1) || (protocol_reports == -1))
986                 return -1;
987         /* Otherwise if both report unknown, report unknown. */
988         return 1;
989 }
990
991 void transport_set_verbosity(struct transport *transport, int verbosity,
992         int force_progress)
993 {
994         if (verbosity >= 2)
995                 transport->verbose = verbosity <= 3 ? verbosity : 3;
996         if (verbosity < 0)
997                 transport->verbose = -1;
998
999         /**
1000          * Rules used to determine whether to report progress (processing aborts
1001          * when a rule is satisfied):
1002          *
1003          *   1. Report progress, if force_progress is 1 (ie. --progress).
1004          *   2. Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1005          *   3. Report progress if isatty(2) is 1.
1006          **/
1007         transport->progress = force_progress || (verbosity >= 0 && isatty(2));
1008 }
1009
1010 int transport_push(struct transport *transport,
1011                    int refspec_nr, const char **refspec, int flags,
1012                    int *nonfastforward)
1013 {
1014         *nonfastforward = 0;
1015         transport_verify_remote_names(refspec_nr, refspec);
1016
1017         if (transport->push) {
1018                 /* Maybe FIXME. But no important transport uses this case. */
1019                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1020                         die("This transport does not support using --set-upstream");
1021
1022                 return transport->push(transport, refspec_nr, refspec, flags);
1023         } else if (transport->push_refs) {
1024                 struct ref *remote_refs =
1025                         transport->get_refs_list(transport, 1);
1026                 struct ref *local_refs = get_local_heads();
1027                 int match_flags = MATCH_REFS_NONE;
1028                 int verbose = (transport->verbose > 0);
1029                 int quiet = (transport->verbose < 0);
1030                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1031                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1032                 int push_ret, ret, err;
1033
1034                 if (flags & TRANSPORT_PUSH_ALL)
1035                         match_flags |= MATCH_REFS_ALL;
1036                 if (flags & TRANSPORT_PUSH_MIRROR)
1037                         match_flags |= MATCH_REFS_MIRROR;
1038
1039                 if (match_refs(local_refs, &remote_refs,
1040                                refspec_nr, refspec, match_flags)) {
1041                         return -1;
1042                 }
1043
1044                 set_ref_status_for_push(remote_refs,
1045                         flags & TRANSPORT_PUSH_MIRROR,
1046                         flags & TRANSPORT_PUSH_FORCE);
1047
1048                 push_ret = transport->push_refs(transport, remote_refs, flags);
1049                 err = push_had_errors(remote_refs);
1050                 ret = push_ret | err;
1051
1052                 if (!quiet || err)
1053                         transport_print_push_status(transport->url, remote_refs,
1054                                         verbose | porcelain, porcelain,
1055                                         nonfastforward);
1056
1057                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1058                         set_upstreams(transport, remote_refs, pretend);
1059
1060                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1061                         struct ref *ref;
1062                         for (ref = remote_refs; ref; ref = ref->next)
1063                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1064                 }
1065
1066                 if (porcelain && !push_ret)
1067                         puts("Done");
1068                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1069                         fprintf(stderr, "Everything up-to-date\n");
1070
1071                 return ret;
1072         }
1073         return 1;
1074 }
1075
1076 const struct ref *transport_get_remote_refs(struct transport *transport)
1077 {
1078         if (!transport->got_remote_refs) {
1079                 transport->remote_refs = transport->get_refs_list(transport, 0);
1080                 transport->got_remote_refs = 1;
1081         }
1082
1083         return transport->remote_refs;
1084 }
1085
1086 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1087 {
1088         int rc;
1089         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1090         struct ref **heads = NULL;
1091         struct ref *rm;
1092
1093         for (rm = refs; rm; rm = rm->next) {
1094                 nr_refs++;
1095                 if (rm->peer_ref &&
1096                     !is_null_sha1(rm->old_sha1) &&
1097                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1098                         continue;
1099                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1100                 heads[nr_heads++] = rm;
1101         }
1102
1103         if (!nr_heads) {
1104                 /*
1105                  * When deepening of a shallow repository is requested,
1106                  * then local and remote refs are likely to still be equal.
1107                  * Just feed them all to the fetch method in that case.
1108                  * This condition shouldn't be met in a non-deepening fetch
1109                  * (see builtin-fetch.c:quickfetch()).
1110                  */
1111                 heads = xmalloc(nr_refs * sizeof(*heads));
1112                 for (rm = refs; rm; rm = rm->next)
1113                         heads[nr_heads++] = rm;
1114         }
1115
1116         rc = transport->fetch(transport, nr_heads, heads);
1117
1118         free(heads);
1119         return rc;
1120 }
1121
1122 void transport_unlock_pack(struct transport *transport)
1123 {
1124         if (transport->pack_lockfile) {
1125                 unlink_or_warn(transport->pack_lockfile);
1126                 free(transport->pack_lockfile);
1127                 transport->pack_lockfile = NULL;
1128         }
1129 }
1130
1131 int transport_connect(struct transport *transport, const char *name,
1132                       const char *exec, int fd[2])
1133 {
1134         if (transport->connect)
1135                 return transport->connect(transport, name, exec, fd);
1136         else
1137                 die("Operation not supported by protocol");
1138 }
1139
1140 int transport_disconnect(struct transport *transport)
1141 {
1142         int ret = 0;
1143         if (transport->disconnect)
1144                 ret = transport->disconnect(transport);
1145         free(transport);
1146         return ret;
1147 }
1148
1149 /*
1150  * Strip username (and password) from an url and return
1151  * it in a newly allocated string.
1152  */
1153 char *transport_anonymize_url(const char *url)
1154 {
1155         char *anon_url, *scheme_prefix, *anon_part;
1156         size_t anon_len, prefix_len = 0;
1157
1158         anon_part = strchr(url, '@');
1159         if (is_local(url) || !anon_part)
1160                 goto literal_copy;
1161
1162         anon_len = strlen(++anon_part);
1163         scheme_prefix = strstr(url, "://");
1164         if (!scheme_prefix) {
1165                 if (!strchr(anon_part, ':'))
1166                         /* cannot be "me@there:/path/name" */
1167                         goto literal_copy;
1168         } else {
1169                 const char *cp;
1170                 /* make sure scheme is reasonable */
1171                 for (cp = url; cp < scheme_prefix; cp++) {
1172                         switch (*cp) {
1173                                 /* RFC 1738 2.1 */
1174                         case '+': case '.': case '-':
1175                                 break; /* ok */
1176                         default:
1177                                 if (isalnum(*cp))
1178                                         break;
1179                                 /* it isn't */
1180                                 goto literal_copy;
1181                         }
1182                 }
1183                 /* @ past the first slash does not count */
1184                 cp = strchr(scheme_prefix + 3, '/');
1185                 if (cp && cp < anon_part)
1186                         goto literal_copy;
1187                 prefix_len = scheme_prefix - url + 3;
1188         }
1189         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1190         memcpy(anon_url, url, prefix_len);
1191         memcpy(anon_url + prefix_len, anon_part, anon_len);
1192         return anon_url;
1193 literal_copy:
1194         return xstrdup(url);
1195 }
1196
1197 struct alternate_refs_data {
1198         alternate_ref_fn *fn;
1199         void *data;
1200 };
1201
1202 static int refs_from_alternate_cb(struct alternate_object_database *e,
1203                                   void *data)
1204 {
1205         char *other;
1206         size_t len;
1207         struct remote *remote;
1208         struct transport *transport;
1209         const struct ref *extra;
1210         struct alternate_refs_data *cb = data;
1211
1212         e->name[-1] = '\0';
1213         other = xstrdup(real_path(e->base));
1214         e->name[-1] = '/';
1215         len = strlen(other);
1216
1217         while (other[len-1] == '/')
1218                 other[--len] = '\0';
1219         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1220                 return 0;
1221         /* Is this a git repository with refs? */
1222         memcpy(other + len - 8, "/refs", 6);
1223         if (!is_directory(other))
1224                 return 0;
1225         other[len - 8] = '\0';
1226         remote = remote_get(other);
1227         transport = transport_get(remote, other);
1228         for (extra = transport_get_remote_refs(transport);
1229              extra;
1230              extra = extra->next)
1231                 cb->fn(extra, cb->data);
1232         transport_disconnect(transport);
1233         free(other);
1234         return 0;
1235 }
1236
1237 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1238 {
1239         struct alternate_refs_data cb;
1240         cb.fn = fn;
1241         cb.data = data;
1242         foreach_alt_odb(refs_from_alternate_cb, &cb);
1243 }