Merge branch 'mm/checkout-auto-track-fix' into maint
[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         args.check_self_contained_and_connected =
538                 data->options.check_self_contained_and_connected;
539
540         if (!data->got_remote_heads) {
541                 connect_setup(transport, 0, 0);
542                 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0, 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, to_fetch, nr_heads,
549                           &transport->pack_lockfile);
550         close(data->fd[0]);
551         close(data->fd[1]);
552         if (finish_connect(data->conn))
553                 refs = NULL;
554         data->conn = NULL;
555         data->got_remote_heads = 0;
556         data->options.self_contained_and_connected =
557                 args.self_contained_and_connected;
558
559         free_refs(refs_tmp);
560
561         free(dest);
562         return (refs ? 0 : -1);
563 }
564
565 static int push_had_errors(struct ref *ref)
566 {
567         for (; ref; ref = ref->next) {
568                 switch (ref->status) {
569                 case REF_STATUS_NONE:
570                 case REF_STATUS_UPTODATE:
571                 case REF_STATUS_OK:
572                         break;
573                 default:
574                         return 1;
575                 }
576         }
577         return 0;
578 }
579
580 int transport_refs_pushed(struct ref *ref)
581 {
582         for (; ref; ref = ref->next) {
583                 switch(ref->status) {
584                 case REF_STATUS_NONE:
585                 case REF_STATUS_UPTODATE:
586                         break;
587                 default:
588                         return 1;
589                 }
590         }
591         return 0;
592 }
593
594 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
595 {
596         struct refspec rs;
597
598         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
599                 return;
600
601         rs.src = ref->name;
602         rs.dst = NULL;
603
604         if (!remote_find_tracking(remote, &rs)) {
605                 if (verbose)
606                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
607                 if (ref->deletion) {
608                         delete_ref(rs.dst, NULL, 0);
609                 } else
610                         update_ref("update by push", rs.dst,
611                                         ref->new_sha1, NULL, 0, 0);
612                 free(rs.dst);
613         }
614 }
615
616 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
617 {
618         if (porcelain) {
619                 if (from)
620                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
621                 else
622                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
623                 if (msg)
624                         fprintf(stdout, "%s (%s)\n", summary, msg);
625                 else
626                         fprintf(stdout, "%s\n", summary);
627         } else {
628                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
629                 if (from)
630                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
631                 else
632                         fputs(prettify_refname(to->name), stderr);
633                 if (msg) {
634                         fputs(" (", stderr);
635                         fputs(msg, stderr);
636                         fputc(')', stderr);
637                 }
638                 fputc('\n', stderr);
639         }
640 }
641
642 static const char *status_abbrev(unsigned char sha1[20])
643 {
644         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
645 }
646
647 static void print_ok_ref_status(struct ref *ref, int porcelain)
648 {
649         if (ref->deletion)
650                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
651         else if (is_null_sha1(ref->old_sha1))
652                 print_ref_status('*',
653                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
654                         "[new branch]"),
655                         ref, ref->peer_ref, NULL, porcelain);
656         else {
657                 char quickref[84];
658                 char type;
659                 const char *msg;
660
661                 strcpy(quickref, status_abbrev(ref->old_sha1));
662                 if (ref->forced_update) {
663                         strcat(quickref, "...");
664                         type = '+';
665                         msg = "forced update";
666                 } else {
667                         strcat(quickref, "..");
668                         type = ' ';
669                         msg = NULL;
670                 }
671                 strcat(quickref, status_abbrev(ref->new_sha1));
672
673                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
674         }
675 }
676
677 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
678 {
679         if (!count)
680                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
681
682         switch(ref->status) {
683         case REF_STATUS_NONE:
684                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
685                 break;
686         case REF_STATUS_REJECT_NODELETE:
687                 print_ref_status('!', "[rejected]", ref, NULL,
688                                                  "remote does not support deleting refs", porcelain);
689                 break;
690         case REF_STATUS_UPTODATE:
691                 print_ref_status('=', "[up to date]", ref,
692                                                  ref->peer_ref, NULL, porcelain);
693                 break;
694         case REF_STATUS_REJECT_NONFASTFORWARD:
695                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
696                                                  "non-fast-forward", porcelain);
697                 break;
698         case REF_STATUS_REJECT_ALREADY_EXISTS:
699                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
700                                                  "already exists", porcelain);
701                 break;
702         case REF_STATUS_REJECT_FETCH_FIRST:
703                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
704                                                  "fetch first", porcelain);
705                 break;
706         case REF_STATUS_REJECT_NEEDS_FORCE:
707                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
708                                                  "needs force", porcelain);
709                 break;
710         case REF_STATUS_REMOTE_REJECT:
711                 print_ref_status('!', "[remote rejected]", ref,
712                                                  ref->deletion ? NULL : ref->peer_ref,
713                                                  ref->remote_status, porcelain);
714                 break;
715         case REF_STATUS_EXPECTING_REPORT:
716                 print_ref_status('!', "[remote failure]", ref,
717                                                  ref->deletion ? NULL : ref->peer_ref,
718                                                  "remote failed to report status", porcelain);
719                 break;
720         case REF_STATUS_OK:
721                 print_ok_ref_status(ref, porcelain);
722                 break;
723         }
724
725         return 1;
726 }
727
728 void transport_print_push_status(const char *dest, struct ref *refs,
729                                   int verbose, int porcelain, unsigned int *reject_reasons)
730 {
731         struct ref *ref;
732         int n = 0;
733         unsigned char head_sha1[20];
734         char *head;
735
736         head = resolve_refdup("HEAD", head_sha1, 1, NULL);
737
738         if (verbose) {
739                 for (ref = refs; ref; ref = ref->next)
740                         if (ref->status == REF_STATUS_UPTODATE)
741                                 n += print_one_push_status(ref, dest, n, porcelain);
742         }
743
744         for (ref = refs; ref; ref = ref->next)
745                 if (ref->status == REF_STATUS_OK)
746                         n += print_one_push_status(ref, dest, n, porcelain);
747
748         *reject_reasons = 0;
749         for (ref = refs; ref; ref = ref->next) {
750                 if (ref->status != REF_STATUS_NONE &&
751                     ref->status != REF_STATUS_UPTODATE &&
752                     ref->status != REF_STATUS_OK)
753                         n += print_one_push_status(ref, dest, n, porcelain);
754                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
755                         if (head != NULL && !strcmp(head, ref->name))
756                                 *reject_reasons |= REJECT_NON_FF_HEAD;
757                         else
758                                 *reject_reasons |= REJECT_NON_FF_OTHER;
759                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
760                         *reject_reasons |= REJECT_ALREADY_EXISTS;
761                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
762                         *reject_reasons |= REJECT_FETCH_FIRST;
763                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
764                         *reject_reasons |= REJECT_NEEDS_FORCE;
765                 }
766         }
767 }
768
769 void transport_verify_remote_names(int nr_heads, const char **heads)
770 {
771         int i;
772
773         for (i = 0; i < nr_heads; i++) {
774                 const char *local = heads[i];
775                 const char *remote = strrchr(heads[i], ':');
776
777                 if (*local == '+')
778                         local++;
779
780                 /* A matching refspec is okay.  */
781                 if (remote == local && remote[1] == '\0')
782                         continue;
783
784                 remote = remote ? (remote + 1) : local;
785                 if (check_refname_format(remote,
786                                 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
787                         die("remote part of refspec is not a valid name in %s",
788                                 heads[i]);
789         }
790 }
791
792 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
793 {
794         struct git_transport_data *data = transport->data;
795         struct send_pack_args args;
796         int ret;
797
798         if (!data->got_remote_heads) {
799                 struct ref *tmp_refs;
800                 connect_setup(transport, 1, 0);
801
802                 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL, NULL);
803                 data->got_remote_heads = 1;
804         }
805
806         memset(&args, 0, sizeof(args));
807         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
808         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
809         args.use_thin_pack = data->options.thin;
810         args.verbose = (transport->verbose > 0);
811         args.quiet = (transport->verbose < 0);
812         args.progress = transport->progress;
813         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
814         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
815
816         ret = send_pack(&args, data->fd, data->conn, remote_refs,
817                         &data->extra_have);
818
819         close(data->fd[1]);
820         close(data->fd[0]);
821         ret |= finish_connect(data->conn);
822         data->conn = NULL;
823         data->got_remote_heads = 0;
824
825         return ret;
826 }
827
828 static int connect_git(struct transport *transport, const char *name,
829                        const char *executable, int fd[2])
830 {
831         struct git_transport_data *data = transport->data;
832         data->conn = git_connect(data->fd, transport->url,
833                                  executable, 0);
834         fd[0] = data->fd[0];
835         fd[1] = data->fd[1];
836         return 0;
837 }
838
839 static int disconnect_git(struct transport *transport)
840 {
841         struct git_transport_data *data = transport->data;
842         if (data->conn) {
843                 if (data->got_remote_heads)
844                         packet_flush(data->fd[1]);
845                 close(data->fd[0]);
846                 close(data->fd[1]);
847                 finish_connect(data->conn);
848         }
849
850         free(data);
851         return 0;
852 }
853
854 void transport_take_over(struct transport *transport,
855                          struct child_process *child)
856 {
857         struct git_transport_data *data;
858
859         if (!transport->smart_options)
860                 die("Bug detected: Taking over transport requires non-NULL "
861                     "smart_options field.");
862
863         data = xcalloc(1, sizeof(*data));
864         data->options = *transport->smart_options;
865         data->conn = child;
866         data->fd[0] = data->conn->out;
867         data->fd[1] = data->conn->in;
868         data->got_remote_heads = 0;
869         transport->data = data;
870
871         transport->set_option = NULL;
872         transport->get_refs_list = get_refs_via_connect;
873         transport->fetch = fetch_refs_via_pack;
874         transport->push = NULL;
875         transport->push_refs = git_transport_push;
876         transport->disconnect = disconnect_git;
877         transport->smart_options = &(data->options);
878
879         transport->cannot_reuse = 1;
880 }
881
882 static int is_local(const char *url)
883 {
884         const char *colon = strchr(url, ':');
885         const char *slash = strchr(url, '/');
886         return !colon || (slash && slash < colon) ||
887                 has_dos_drive_prefix(url);
888 }
889
890 static int is_file(const char *url)
891 {
892         struct stat buf;
893         if (stat(url, &buf))
894                 return 0;
895         return S_ISREG(buf.st_mode);
896 }
897
898 static int external_specification_len(const char *url)
899 {
900         return strchr(url, ':') - url;
901 }
902
903 struct transport *transport_get(struct remote *remote, const char *url)
904 {
905         const char *helper;
906         struct transport *ret = xcalloc(1, sizeof(*ret));
907
908         ret->progress = isatty(2);
909
910         if (!remote)
911                 die("No remote provided to transport_get()");
912
913         ret->got_remote_refs = 0;
914         ret->remote = remote;
915         helper = remote->foreign_vcs;
916
917         if (!url && remote->url)
918                 url = remote->url[0];
919         ret->url = url;
920
921         /* maybe it is a foreign URL? */
922         if (url) {
923                 const char *p = url;
924
925                 while (is_urlschemechar(p == url, *p))
926                         p++;
927                 if (!prefixcmp(p, "::"))
928                         helper = xstrndup(url, p - url);
929         }
930
931         if (helper) {
932                 transport_helper_init(ret, helper);
933         } else if (!prefixcmp(url, "rsync:")) {
934                 ret->get_refs_list = get_refs_via_rsync;
935                 ret->fetch = fetch_objs_via_rsync;
936                 ret->push = rsync_transport_push;
937                 ret->smart_options = NULL;
938         } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
939                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
940                 ret->data = data;
941                 ret->get_refs_list = get_refs_from_bundle;
942                 ret->fetch = fetch_refs_from_bundle;
943                 ret->disconnect = close_bundle;
944                 ret->smart_options = NULL;
945         } else if (!is_url(url)
946                 || !prefixcmp(url, "file://")
947                 || !prefixcmp(url, "git://")
948                 || !prefixcmp(url, "ssh://")
949                 || !prefixcmp(url, "git+ssh://")
950                 || !prefixcmp(url, "ssh+git://")) {
951                 /* These are builtin smart transports. */
952                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
953                 ret->data = data;
954                 ret->set_option = NULL;
955                 ret->get_refs_list = get_refs_via_connect;
956                 ret->fetch = fetch_refs_via_pack;
957                 ret->push_refs = git_transport_push;
958                 ret->connect = connect_git;
959                 ret->disconnect = disconnect_git;
960                 ret->smart_options = &(data->options);
961
962                 data->conn = NULL;
963                 data->got_remote_heads = 0;
964         } else {
965                 /* Unknown protocol in URL. Pass to external handler. */
966                 int len = external_specification_len(url);
967                 char *handler = xmalloc(len + 1);
968                 handler[len] = 0;
969                 strncpy(handler, url, len);
970                 transport_helper_init(ret, handler);
971         }
972
973         if (ret->smart_options) {
974                 ret->smart_options->thin = 1;
975                 ret->smart_options->uploadpack = "git-upload-pack";
976                 if (remote->uploadpack)
977                         ret->smart_options->uploadpack = remote->uploadpack;
978                 ret->smart_options->receivepack = "git-receive-pack";
979                 if (remote->receivepack)
980                         ret->smart_options->receivepack = remote->receivepack;
981         }
982
983         return ret;
984 }
985
986 int transport_set_option(struct transport *transport,
987                          const char *name, const char *value)
988 {
989         int git_reports = 1, protocol_reports = 1;
990
991         if (transport->smart_options)
992                 git_reports = set_git_option(transport->smart_options,
993                                              name, value);
994
995         if (transport->set_option)
996                 protocol_reports = transport->set_option(transport, name,
997                                                         value);
998
999         /* If either report is 0, report 0 (success). */
1000         if (!git_reports || !protocol_reports)
1001                 return 0;
1002         /* If either reports -1 (invalid value), report -1. */
1003         if ((git_reports == -1) || (protocol_reports == -1))
1004                 return -1;
1005         /* Otherwise if both report unknown, report unknown. */
1006         return 1;
1007 }
1008
1009 void transport_set_verbosity(struct transport *transport, int verbosity,
1010         int force_progress)
1011 {
1012         if (verbosity >= 1)
1013                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1014         if (verbosity < 0)
1015                 transport->verbose = -1;
1016
1017         /**
1018          * Rules used to determine whether to report progress (processing aborts
1019          * when a rule is satisfied):
1020          *
1021          *   . Report progress, if force_progress is 1 (ie. --progress).
1022          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1023          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1024          *   . Report progress if isatty(2) is 1.
1025          **/
1026         if (force_progress >= 0)
1027                 transport->progress = !!force_progress;
1028         else
1029                 transport->progress = verbosity >= 0 && isatty(2);
1030 }
1031
1032 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1033 {
1034         int i;
1035
1036         fprintf(stderr, "The following submodule paths contain changes that can\n"
1037                         "not be found on any remote:\n");
1038         for (i = 0; i < needs_pushing->nr; i++)
1039                 printf("  %s\n", needs_pushing->items[i].string);
1040         fprintf(stderr, "\nPlease try\n\n"
1041                         "       git push --recurse-submodules=on-demand\n\n"
1042                         "or cd to the path and use\n\n"
1043                         "       git push\n\n"
1044                         "to push them to a remote.\n\n");
1045
1046         string_list_clear(needs_pushing, 0);
1047
1048         die("Aborting.");
1049 }
1050
1051 static int run_pre_push_hook(struct transport *transport,
1052                              struct ref *remote_refs)
1053 {
1054         int ret = 0, x;
1055         struct ref *r;
1056         struct child_process proc;
1057         struct strbuf buf;
1058         const char *argv[4];
1059
1060         if (!(argv[0] = find_hook("pre-push")))
1061                 return 0;
1062
1063         argv[1] = transport->remote->name;
1064         argv[2] = transport->url;
1065         argv[3] = NULL;
1066
1067         memset(&proc, 0, sizeof(proc));
1068         proc.argv = argv;
1069         proc.in = -1;
1070
1071         if (start_command(&proc)) {
1072                 finish_command(&proc);
1073                 return -1;
1074         }
1075
1076         strbuf_init(&buf, 256);
1077
1078         for (r = remote_refs; r; r = r->next) {
1079                 if (!r->peer_ref) continue;
1080                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1081                 if (r->status == REF_STATUS_UPTODATE) continue;
1082
1083                 strbuf_reset(&buf);
1084                 strbuf_addf( &buf, "%s %s %s %s\n",
1085                          r->peer_ref->name, sha1_to_hex(r->new_sha1),
1086                          r->name, sha1_to_hex(r->old_sha1));
1087
1088                 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1089                         ret = -1;
1090                         break;
1091                 }
1092         }
1093
1094         strbuf_release(&buf);
1095
1096         x = close(proc.in);
1097         if (!ret)
1098                 ret = x;
1099
1100         x = finish_command(&proc);
1101         if (!ret)
1102                 ret = x;
1103
1104         return ret;
1105 }
1106
1107 int transport_push(struct transport *transport,
1108                    int refspec_nr, const char **refspec, int flags,
1109                    unsigned int *reject_reasons)
1110 {
1111         *reject_reasons = 0;
1112         transport_verify_remote_names(refspec_nr, refspec);
1113
1114         if (transport->push) {
1115                 /* Maybe FIXME. But no important transport uses this case. */
1116                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1117                         die("This transport does not support using --set-upstream");
1118
1119                 return transport->push(transport, refspec_nr, refspec, flags);
1120         } else if (transport->push_refs) {
1121                 struct ref *remote_refs =
1122                         transport->get_refs_list(transport, 1);
1123                 struct ref *local_refs = get_local_heads();
1124                 int match_flags = MATCH_REFS_NONE;
1125                 int verbose = (transport->verbose > 0);
1126                 int quiet = (transport->verbose < 0);
1127                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1128                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1129                 int push_ret, ret, err;
1130
1131                 if (flags & TRANSPORT_PUSH_ALL)
1132                         match_flags |= MATCH_REFS_ALL;
1133                 if (flags & TRANSPORT_PUSH_MIRROR)
1134                         match_flags |= MATCH_REFS_MIRROR;
1135                 if (flags & TRANSPORT_PUSH_PRUNE)
1136                         match_flags |= MATCH_REFS_PRUNE;
1137                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1138                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1139
1140                 if (match_push_refs(local_refs, &remote_refs,
1141                                     refspec_nr, refspec, match_flags)) {
1142                         return -1;
1143                 }
1144
1145                 set_ref_status_for_push(remote_refs,
1146                         flags & TRANSPORT_PUSH_MIRROR,
1147                         flags & TRANSPORT_PUSH_FORCE);
1148
1149                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1150                         if (run_pre_push_hook(transport, remote_refs))
1151                                 return -1;
1152
1153                 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1154                         struct ref *ref = remote_refs;
1155                         for (; ref; ref = ref->next)
1156                                 if (!is_null_sha1(ref->new_sha1) &&
1157                                     !push_unpushed_submodules(ref->new_sha1,
1158                                             transport->remote->name))
1159                                     die ("Failed to push all needed submodules!");
1160                 }
1161
1162                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1163                               TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1164                         struct ref *ref = remote_refs;
1165                         struct string_list needs_pushing;
1166
1167                         memset(&needs_pushing, 0, sizeof(struct string_list));
1168                         needs_pushing.strdup_strings = 1;
1169                         for (; ref; ref = ref->next)
1170                                 if (!is_null_sha1(ref->new_sha1) &&
1171                                     find_unpushed_submodules(ref->new_sha1,
1172                                             transport->remote->name, &needs_pushing))
1173                                         die_with_unpushed_submodules(&needs_pushing);
1174                 }
1175
1176                 push_ret = transport->push_refs(transport, remote_refs, flags);
1177                 err = push_had_errors(remote_refs);
1178                 ret = push_ret | err;
1179
1180                 if (!quiet || err)
1181                         transport_print_push_status(transport->url, remote_refs,
1182                                         verbose | porcelain, porcelain,
1183                                         reject_reasons);
1184
1185                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1186                         set_upstreams(transport, remote_refs, pretend);
1187
1188                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1189                         struct ref *ref;
1190                         for (ref = remote_refs; ref; ref = ref->next)
1191                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1192                 }
1193
1194                 if (porcelain && !push_ret)
1195                         puts("Done");
1196                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1197                         fprintf(stderr, "Everything up-to-date\n");
1198
1199                 return ret;
1200         }
1201         return 1;
1202 }
1203
1204 const struct ref *transport_get_remote_refs(struct transport *transport)
1205 {
1206         if (!transport->got_remote_refs) {
1207                 transport->remote_refs = transport->get_refs_list(transport, 0);
1208                 transport->got_remote_refs = 1;
1209         }
1210
1211         return transport->remote_refs;
1212 }
1213
1214 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1215 {
1216         int rc;
1217         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1218         struct ref **heads = NULL;
1219         struct ref *rm;
1220
1221         for (rm = refs; rm; rm = rm->next) {
1222                 nr_refs++;
1223                 if (rm->peer_ref &&
1224                     !is_null_sha1(rm->old_sha1) &&
1225                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1226                         continue;
1227                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1228                 heads[nr_heads++] = rm;
1229         }
1230
1231         if (!nr_heads) {
1232                 /*
1233                  * When deepening of a shallow repository is requested,
1234                  * then local and remote refs are likely to still be equal.
1235                  * Just feed them all to the fetch method in that case.
1236                  * This condition shouldn't be met in a non-deepening fetch
1237                  * (see builtin/fetch.c:quickfetch()).
1238                  */
1239                 heads = xmalloc(nr_refs * sizeof(*heads));
1240                 for (rm = refs; rm; rm = rm->next)
1241                         heads[nr_heads++] = rm;
1242         }
1243
1244         rc = transport->fetch(transport, nr_heads, heads);
1245
1246         free(heads);
1247         return rc;
1248 }
1249
1250 void transport_unlock_pack(struct transport *transport)
1251 {
1252         if (transport->pack_lockfile) {
1253                 unlink_or_warn(transport->pack_lockfile);
1254                 free(transport->pack_lockfile);
1255                 transport->pack_lockfile = NULL;
1256         }
1257 }
1258
1259 int transport_connect(struct transport *transport, const char *name,
1260                       const char *exec, int fd[2])
1261 {
1262         if (transport->connect)
1263                 return transport->connect(transport, name, exec, fd);
1264         else
1265                 die("Operation not supported by protocol");
1266 }
1267
1268 int transport_disconnect(struct transport *transport)
1269 {
1270         int ret = 0;
1271         if (transport->disconnect)
1272                 ret = transport->disconnect(transport);
1273         free(transport);
1274         return ret;
1275 }
1276
1277 /*
1278  * Strip username (and password) from a URL and return
1279  * it in a newly allocated string.
1280  */
1281 char *transport_anonymize_url(const char *url)
1282 {
1283         char *anon_url, *scheme_prefix, *anon_part;
1284         size_t anon_len, prefix_len = 0;
1285
1286         anon_part = strchr(url, '@');
1287         if (is_local(url) || !anon_part)
1288                 goto literal_copy;
1289
1290         anon_len = strlen(++anon_part);
1291         scheme_prefix = strstr(url, "://");
1292         if (!scheme_prefix) {
1293                 if (!strchr(anon_part, ':'))
1294                         /* cannot be "me@there:/path/name" */
1295                         goto literal_copy;
1296         } else {
1297                 const char *cp;
1298                 /* make sure scheme is reasonable */
1299                 for (cp = url; cp < scheme_prefix; cp++) {
1300                         switch (*cp) {
1301                                 /* RFC 1738 2.1 */
1302                         case '+': case '.': case '-':
1303                                 break; /* ok */
1304                         default:
1305                                 if (isalnum(*cp))
1306                                         break;
1307                                 /* it isn't */
1308                                 goto literal_copy;
1309                         }
1310                 }
1311                 /* @ past the first slash does not count */
1312                 cp = strchr(scheme_prefix + 3, '/');
1313                 if (cp && cp < anon_part)
1314                         goto literal_copy;
1315                 prefix_len = scheme_prefix - url + 3;
1316         }
1317         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1318         memcpy(anon_url, url, prefix_len);
1319         memcpy(anon_url + prefix_len, anon_part, anon_len);
1320         return anon_url;
1321 literal_copy:
1322         return xstrdup(url);
1323 }
1324
1325 struct alternate_refs_data {
1326         alternate_ref_fn *fn;
1327         void *data;
1328 };
1329
1330 static int refs_from_alternate_cb(struct alternate_object_database *e,
1331                                   void *data)
1332 {
1333         char *other;
1334         size_t len;
1335         struct remote *remote;
1336         struct transport *transport;
1337         const struct ref *extra;
1338         struct alternate_refs_data *cb = data;
1339
1340         e->name[-1] = '\0';
1341         other = xstrdup(real_path(e->base));
1342         e->name[-1] = '/';
1343         len = strlen(other);
1344
1345         while (other[len-1] == '/')
1346                 other[--len] = '\0';
1347         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1348                 return 0;
1349         /* Is this a git repository with refs? */
1350         memcpy(other + len - 8, "/refs", 6);
1351         if (!is_directory(other))
1352                 return 0;
1353         other[len - 8] = '\0';
1354         remote = remote_get(other);
1355         transport = transport_get(remote, other);
1356         for (extra = transport_get_remote_refs(transport);
1357              extra;
1358              extra = extra->next)
1359                 cb->fn(extra, cb->data);
1360         transport_disconnect(transport);
1361         free(other);
1362         return 0;
1363 }
1364
1365 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1366 {
1367         struct alternate_refs_data cb;
1368         cb.fn = fn;
1369         cb.data = data;
1370         foreach_alt_odb(refs_from_alternate_cb, &cb);
1371 }