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