Merge branch 'jn/maint-c99-format'
[git] / transport.c
1 #include "cache.h"
2 #include "transport.h"
3 #include "run-command.h"
4 #include "pkt-line.h"
5 #include "fetch-pack.h"
6 #include "send-pack.h"
7 #include "walker.h"
8 #include "bundle.h"
9 #include "dir.h"
10 #include "refs.h"
11 #include "branch.h"
12 #include "url.h"
13
14 /* rsync support */
15
16 /*
17  * We copy packed-refs and refs/ into a temporary file, then read the
18  * loose refs recursively (sorting whenever possible), and then inserting
19  * those packed refs that are not yet in the list (not validating, but
20  * assuming that the file is sorted).
21  *
22  * Appears refactoring this from refs.c is too cumbersome.
23  */
24
25 static int str_cmp(const void *a, const void *b)
26 {
27         const char *s1 = a;
28         const char *s2 = b;
29
30         return strcmp(s1, s2);
31 }
32
33 /* path->buf + name_offset is expected to point to "refs/" */
34
35 static int read_loose_refs(struct strbuf *path, int name_offset,
36                 struct ref **tail)
37 {
38         DIR *dir = opendir(path->buf);
39         struct dirent *de;
40         struct {
41                 char **entries;
42                 int nr, alloc;
43         } list;
44         int i, pathlen;
45
46         if (!dir)
47                 return -1;
48
49         memset (&list, 0, sizeof(list));
50
51         while ((de = readdir(dir))) {
52                 if (is_dot_or_dotdot(de->d_name))
53                         continue;
54                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
55                 list.entries[list.nr++] = xstrdup(de->d_name);
56         }
57         closedir(dir);
58
59         /* sort the list */
60
61         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
62
63         pathlen = path->len;
64         strbuf_addch(path, '/');
65
66         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
67                 strbuf_addstr(path, list.entries[i]);
68                 if (read_loose_refs(path, name_offset, tail)) {
69                         int fd = open(path->buf, O_RDONLY);
70                         char buffer[40];
71                         struct ref *next;
72
73                         if (fd < 0)
74                                 continue;
75                         next = alloc_ref(path->buf + name_offset);
76                         if (read_in_full(fd, buffer, 40) != 40 ||
77                                         get_sha1_hex(buffer, next->old_sha1)) {
78                                 close(fd);
79                                 free(next);
80                                 continue;
81                         }
82                         close(fd);
83                         (*tail)->next = next;
84                         *tail = next;
85                 }
86         }
87         strbuf_setlen(path, pathlen);
88
89         for (i = 0; i < list.nr; i++)
90                 free(list.entries[i]);
91         free(list.entries);
92
93         return 0;
94 }
95
96 /* insert the packed refs for which no loose refs were found */
97
98 static void insert_packed_refs(const char *packed_refs, struct ref **list)
99 {
100         FILE *f = fopen(packed_refs, "r");
101         static char buffer[PATH_MAX];
102
103         if (!f)
104                 return;
105
106         for (;;) {
107                 int cmp = cmp, len;
108
109                 if (!fgets(buffer, sizeof(buffer), f)) {
110                         fclose(f);
111                         return;
112                 }
113
114                 if (hexval(buffer[0]) > 0xf)
115                         continue;
116                 len = strlen(buffer);
117                 if (len && buffer[len - 1] == '\n')
118                         buffer[--len] = '\0';
119                 if (len < 41)
120                         continue;
121                 while ((*list)->next &&
122                                 (cmp = strcmp(buffer + 41,
123                                       (*list)->next->name)) > 0)
124                         list = &(*list)->next;
125                 if (!(*list)->next || cmp < 0) {
126                         struct ref *next = alloc_ref(buffer + 41);
127                         buffer[40] = '\0';
128                         if (get_sha1_hex(buffer, next->old_sha1)) {
129                                 warning ("invalid SHA-1: %s", buffer);
130                                 free(next);
131                                 continue;
132                         }
133                         next->next = (*list)->next;
134                         (*list)->next = next;
135                         list = &(*list)->next;
136                 }
137         }
138 }
139
140 static void set_upstreams(struct transport *transport, struct ref *refs,
141         int pretend)
142 {
143         struct ref *ref;
144         for (ref = refs; ref; ref = ref->next) {
145                 const char *localname;
146                 const char *tmp;
147                 const char *remotename;
148                 unsigned char sha[20];
149                 int flag = 0;
150                 /*
151                  * Check suitability for tracking. Must be successful /
152                  * already up-to-date ref create/modify (not delete).
153                  */
154                 if (ref->status != REF_STATUS_OK &&
155                         ref->status != REF_STATUS_UPTODATE)
156                         continue;
157                 if (!ref->peer_ref)
158                         continue;
159                 if (!ref->new_sha1 || is_null_sha1(ref->new_sha1))
160                         continue;
161
162                 /* Follow symbolic refs (mainly for HEAD). */
163                 localname = ref->peer_ref->name;
164                 remotename = ref->name;
165                 tmp = resolve_ref(localname, sha, 1, &flag);
166                 if (tmp && flag & REF_ISSYMREF &&
167                         !prefixcmp(tmp, "refs/heads/"))
168                         localname = tmp;
169
170                 /* Both source and destination must be local branches. */
171                 if (!localname || prefixcmp(localname, "refs/heads/"))
172                         continue;
173                 if (!remotename || prefixcmp(remotename, "refs/heads/"))
174                         continue;
175
176                 if (!pretend)
177                         install_branch_config(BRANCH_CONFIG_VERBOSE,
178                                 localname + 11, transport->remote->name,
179                                 remotename);
180                 else
181                         printf("Would set upstream of '%s' to '%s' of '%s'\n",
182                                 localname + 11, remotename + 11,
183                                 transport->remote->name);
184         }
185 }
186
187 static const char *rsync_url(const char *url)
188 {
189         return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
190 }
191
192 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
193 {
194         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
195         struct ref dummy = {NULL}, *tail = &dummy;
196         struct child_process rsync;
197         const char *args[5];
198         int temp_dir_len;
199
200         if (for_push)
201                 return NULL;
202
203         /* copy the refs to the temporary directory */
204
205         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
206         if (!mkdtemp(temp_dir.buf))
207                 die_errno ("Could not make temporary directory");
208         temp_dir_len = temp_dir.len;
209
210         strbuf_addstr(&buf, rsync_url(transport->url));
211         strbuf_addstr(&buf, "/refs");
212
213         memset(&rsync, 0, sizeof(rsync));
214         rsync.argv = args;
215         rsync.stdout_to_stderr = 1;
216         args[0] = "rsync";
217         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
218         args[2] = buf.buf;
219         args[3] = temp_dir.buf;
220         args[4] = NULL;
221
222         if (run_command(&rsync))
223                 die ("Could not run rsync to get refs");
224
225         strbuf_reset(&buf);
226         strbuf_addstr(&buf, rsync_url(transport->url));
227         strbuf_addstr(&buf, "/packed-refs");
228
229         args[2] = buf.buf;
230
231         if (run_command(&rsync))
232                 die ("Could not run rsync to get refs");
233
234         /* read the copied refs */
235
236         strbuf_addstr(&temp_dir, "/refs");
237         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
238         strbuf_setlen(&temp_dir, temp_dir_len);
239
240         tail = &dummy;
241         strbuf_addstr(&temp_dir, "/packed-refs");
242         insert_packed_refs(temp_dir.buf, &tail);
243         strbuf_setlen(&temp_dir, temp_dir_len);
244
245         if (remove_dir_recursively(&temp_dir, 0))
246                 warning ("Error removing temporary directory %s.",
247                                 temp_dir.buf);
248
249         strbuf_release(&buf);
250         strbuf_release(&temp_dir);
251
252         return dummy.next;
253 }
254
255 static int fetch_objs_via_rsync(struct transport *transport,
256                                 int nr_objs, struct ref **to_fetch)
257 {
258         struct strbuf buf = STRBUF_INIT;
259         struct child_process rsync;
260         const char *args[8];
261         int result;
262
263         strbuf_addstr(&buf, rsync_url(transport->url));
264         strbuf_addstr(&buf, "/objects/");
265
266         memset(&rsync, 0, sizeof(rsync));
267         rsync.argv = args;
268         rsync.stdout_to_stderr = 1;
269         args[0] = "rsync";
270         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
271         args[2] = "--ignore-existing";
272         args[3] = "--exclude";
273         args[4] = "info";
274         args[5] = buf.buf;
275         args[6] = get_object_directory();
276         args[7] = NULL;
277
278         /* NEEDSWORK: handle one level of alternates */
279         result = run_command(&rsync);
280
281         strbuf_release(&buf);
282
283         return result;
284 }
285
286 static int write_one_ref(const char *name, const unsigned char *sha1,
287                 int flags, void *data)
288 {
289         struct strbuf *buf = data;
290         int len = buf->len;
291         FILE *f;
292
293         /* when called via for_each_ref(), flags is non-zero */
294         if (flags && prefixcmp(name, "refs/heads/") &&
295                         prefixcmp(name, "refs/tags/"))
296                 return 0;
297
298         strbuf_addstr(buf, name);
299         if (safe_create_leading_directories(buf->buf) ||
300                         !(f = fopen(buf->buf, "w")) ||
301                         fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
302                         fclose(f))
303                 return error("problems writing temporary file %s", buf->buf);
304         strbuf_setlen(buf, len);
305         return 0;
306 }
307
308 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
309                 int refspec_nr, const char **refspec)
310 {
311         int i;
312
313         for (i = 0; i < refspec_nr; i++) {
314                 unsigned char sha1[20];
315                 char *ref;
316
317                 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
318                         return error("Could not get ref %s", refspec[i]);
319
320                 if (write_one_ref(ref, sha1, 0, temp_dir)) {
321                         free(ref);
322                         return -1;
323                 }
324                 free(ref);
325         }
326         return 0;
327 }
328
329 static int rsync_transport_push(struct transport *transport,
330                 int refspec_nr, const char **refspec, int flags)
331 {
332         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
333         int result = 0, i;
334         struct child_process rsync;
335         const char *args[10];
336
337         if (flags & TRANSPORT_PUSH_MIRROR)
338                 return error("rsync transport does not support mirror mode");
339
340         /* first push the objects */
341
342         strbuf_addstr(&buf, rsync_url(transport->url));
343         strbuf_addch(&buf, '/');
344
345         memset(&rsync, 0, sizeof(rsync));
346         rsync.argv = args;
347         rsync.stdout_to_stderr = 1;
348         i = 0;
349         args[i++] = "rsync";
350         args[i++] = "-a";
351         if (flags & TRANSPORT_PUSH_DRY_RUN)
352                 args[i++] = "--dry-run";
353         if (transport->verbose > 0)
354                 args[i++] = "-v";
355         args[i++] = "--ignore-existing";
356         args[i++] = "--exclude";
357         args[i++] = "info";
358         args[i++] = get_object_directory();
359         args[i++] = buf.buf;
360         args[i++] = NULL;
361
362         if (run_command(&rsync))
363                 return error("Could not push objects to %s",
364                                 rsync_url(transport->url));
365
366         /* copy the refs to the temporary directory; they could be packed. */
367
368         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
369         if (!mkdtemp(temp_dir.buf))
370                 die_errno ("Could not make temporary directory");
371         strbuf_addch(&temp_dir, '/');
372
373         if (flags & TRANSPORT_PUSH_ALL) {
374                 if (for_each_ref(write_one_ref, &temp_dir))
375                         return -1;
376         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
377                 return -1;
378
379         i = 2;
380         if (flags & TRANSPORT_PUSH_DRY_RUN)
381                 args[i++] = "--dry-run";
382         if (!(flags & TRANSPORT_PUSH_FORCE))
383                 args[i++] = "--ignore-existing";
384         args[i++] = temp_dir.buf;
385         args[i++] = rsync_url(transport->url);
386         args[i++] = NULL;
387         if (run_command(&rsync))
388                 result = error("Could not push to %s",
389                                 rsync_url(transport->url));
390
391         if (remove_dir_recursively(&temp_dir, 0))
392                 warning ("Could not remove temporary directory %s.",
393                                 temp_dir.buf);
394
395         strbuf_release(&buf);
396         strbuf_release(&temp_dir);
397
398         return result;
399 }
400
401 struct bundle_transport_data {
402         int fd;
403         struct bundle_header header;
404 };
405
406 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
407 {
408         struct bundle_transport_data *data = transport->data;
409         struct ref *result = NULL;
410         int i;
411
412         if (for_push)
413                 return NULL;
414
415         if (data->fd > 0)
416                 close(data->fd);
417         data->fd = read_bundle_header(transport->url, &data->header);
418         if (data->fd < 0)
419                 die ("Could not read bundle '%s'.", transport->url);
420         for (i = 0; i < data->header.references.nr; i++) {
421                 struct ref_list_entry *e = data->header.references.list + i;
422                 struct ref *ref = alloc_ref(e->name);
423                 hashcpy(ref->old_sha1, e->sha1);
424                 ref->next = result;
425                 result = ref;
426         }
427         return result;
428 }
429
430 static int fetch_refs_from_bundle(struct transport *transport,
431                                int nr_heads, struct ref **to_fetch)
432 {
433         struct bundle_transport_data *data = transport->data;
434         return unbundle(&data->header, data->fd);
435 }
436
437 static int close_bundle(struct transport *transport)
438 {
439         struct bundle_transport_data *data = transport->data;
440         if (data->fd > 0)
441                 close(data->fd);
442         free(data);
443         return 0;
444 }
445
446 struct git_transport_data {
447         struct git_transport_options options;
448         struct child_process *conn;
449         int fd[2];
450         unsigned got_remote_heads : 1;
451         struct extra_have_objects extra_have;
452 };
453
454 static int set_git_option(struct git_transport_options *opts,
455                           const char *name, const char *value)
456 {
457         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
458                 opts->uploadpack = value;
459                 return 0;
460         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
461                 opts->receivepack = value;
462                 return 0;
463         } else if (!strcmp(name, TRANS_OPT_THIN)) {
464                 opts->thin = !!value;
465                 return 0;
466         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
467                 opts->followtags = !!value;
468                 return 0;
469         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
470                 opts->keep = !!value;
471                 return 0;
472         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
473                 if (!value)
474                         opts->depth = 0;
475                 else
476                         opts->depth = atoi(value);
477                 return 0;
478         }
479         return 1;
480 }
481
482 static int connect_setup(struct transport *transport, int for_push, int verbose)
483 {
484         struct git_transport_data *data = transport->data;
485
486         if (data->conn)
487                 return 0;
488
489         data->conn = git_connect(data->fd, transport->url,
490                                  for_push ? data->options.receivepack :
491                                  data->options.uploadpack,
492                                  verbose ? CONNECT_VERBOSE : 0);
493
494         return 0;
495 }
496
497 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
498 {
499         struct git_transport_data *data = transport->data;
500         struct ref *refs;
501
502         connect_setup(transport, for_push, 0);
503         get_remote_heads(data->fd[0], &refs, 0, NULL,
504                          for_push ? REF_NORMAL : 0, &data->extra_have);
505         data->got_remote_heads = 1;
506
507         return refs;
508 }
509
510 static int fetch_refs_via_pack(struct transport *transport,
511                                int nr_heads, struct ref **to_fetch)
512 {
513         struct git_transport_data *data = transport->data;
514         char **heads = xmalloc(nr_heads * sizeof(*heads));
515         char **origh = xmalloc(nr_heads * sizeof(*origh));
516         const struct ref *refs;
517         char *dest = xstrdup(transport->url);
518         struct fetch_pack_args args;
519         int i;
520         struct ref *refs_tmp = NULL;
521
522         memset(&args, 0, sizeof(args));
523         args.uploadpack = data->options.uploadpack;
524         args.keep_pack = data->options.keep;
525         args.lock_pack = 1;
526         args.use_thin_pack = data->options.thin;
527         args.include_tag = data->options.followtags;
528         args.verbose = (transport->verbose > 0);
529         args.quiet = (transport->verbose < 0);
530         args.no_progress = !transport->progress;
531         args.depth = data->options.depth;
532
533         for (i = 0; i < nr_heads; i++)
534                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
535
536         if (!data->got_remote_heads) {
537                 connect_setup(transport, 0, 0);
538                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
539                 data->got_remote_heads = 1;
540         }
541
542         refs = fetch_pack(&args, data->fd, data->conn,
543                           refs_tmp ? refs_tmp : transport->remote_refs,
544                           dest, nr_heads, heads, &transport->pack_lockfile);
545         close(data->fd[0]);
546         close(data->fd[1]);
547         if (finish_connect(data->conn))
548                 refs = NULL;
549         data->conn = NULL;
550         data->got_remote_heads = 0;
551
552         free_refs(refs_tmp);
553
554         for (i = 0; i < nr_heads; i++)
555                 free(origh[i]);
556         free(origh);
557         free(heads);
558         free(dest);
559         return (refs ? 0 : -1);
560 }
561
562 static int push_had_errors(struct ref *ref)
563 {
564         for (; ref; ref = ref->next) {
565                 switch (ref->status) {
566                 case REF_STATUS_NONE:
567                 case REF_STATUS_UPTODATE:
568                 case REF_STATUS_OK:
569                         break;
570                 default:
571                         return 1;
572                 }
573         }
574         return 0;
575 }
576
577 int transport_refs_pushed(struct ref *ref)
578 {
579         for (; ref; ref = ref->next) {
580                 switch(ref->status) {
581                 case REF_STATUS_NONE:
582                 case REF_STATUS_UPTODATE:
583                         break;
584                 default:
585                         return 1;
586                 }
587         }
588         return 0;
589 }
590
591 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
592 {
593         struct refspec rs;
594
595         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
596                 return;
597
598         rs.src = ref->name;
599         rs.dst = NULL;
600
601         if (!remote_find_tracking(remote, &rs)) {
602                 if (verbose)
603                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
604                 if (ref->deletion) {
605                         delete_ref(rs.dst, NULL, 0);
606                 } else
607                         update_ref("update by push", rs.dst,
608                                         ref->new_sha1, NULL, 0, 0);
609                 free(rs.dst);
610         }
611 }
612
613 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
614 {
615         if (porcelain) {
616                 if (from)
617                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
618                 else
619                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
620                 if (msg)
621                         fprintf(stdout, "%s (%s)\n", summary, msg);
622                 else
623                         fprintf(stdout, "%s\n", summary);
624         } else {
625                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
626                 if (from)
627                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
628                 else
629                         fputs(prettify_refname(to->name), stderr);
630                 if (msg) {
631                         fputs(" (", stderr);
632                         fputs(msg, stderr);
633                         fputc(')', stderr);
634                 }
635                 fputc('\n', stderr);
636         }
637 }
638
639 static const char *status_abbrev(unsigned char sha1[20])
640 {
641         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
642 }
643
644 static void print_ok_ref_status(struct ref *ref, int porcelain)
645 {
646         if (ref->deletion)
647                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
648         else if (is_null_sha1(ref->old_sha1))
649                 print_ref_status('*',
650                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
651                         "[new branch]"),
652                         ref, ref->peer_ref, NULL, porcelain);
653         else {
654                 char quickref[84];
655                 char type;
656                 const char *msg;
657
658                 strcpy(quickref, status_abbrev(ref->old_sha1));
659                 if (ref->nonfastforward) {
660                         strcat(quickref, "...");
661                         type = '+';
662                         msg = "forced update";
663                 } else {
664                         strcat(quickref, "..");
665                         type = ' ';
666                         msg = NULL;
667                 }
668                 strcat(quickref, status_abbrev(ref->new_sha1));
669
670                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
671         }
672 }
673
674 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
675 {
676         if (!count)
677                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
678
679         switch(ref->status) {
680         case REF_STATUS_NONE:
681                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
682                 break;
683         case REF_STATUS_REJECT_NODELETE:
684                 print_ref_status('!', "[rejected]", ref, NULL,
685                                                  "remote does not support deleting refs", porcelain);
686                 break;
687         case REF_STATUS_UPTODATE:
688                 print_ref_status('=', "[up to date]", ref,
689                                                  ref->peer_ref, NULL, porcelain);
690                 break;
691         case REF_STATUS_REJECT_NONFASTFORWARD:
692                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
693                                                  "non-fast-forward", porcelain);
694                 break;
695         case REF_STATUS_REMOTE_REJECT:
696                 print_ref_status('!', "[remote rejected]", ref,
697                                                  ref->deletion ? NULL : ref->peer_ref,
698                                                  ref->remote_status, porcelain);
699                 break;
700         case REF_STATUS_EXPECTING_REPORT:
701                 print_ref_status('!', "[remote failure]", ref,
702                                                  ref->deletion ? NULL : ref->peer_ref,
703                                                  "remote failed to report status", porcelain);
704                 break;
705         case REF_STATUS_OK:
706                 print_ok_ref_status(ref, porcelain);
707                 break;
708         }
709
710         return 1;
711 }
712
713 void transport_print_push_status(const char *dest, struct ref *refs,
714                                   int verbose, int porcelain, int *nonfastforward)
715 {
716         struct ref *ref;
717         int n = 0;
718
719         if (verbose) {
720                 for (ref = refs; ref; ref = ref->next)
721                         if (ref->status == REF_STATUS_UPTODATE)
722                                 n += print_one_push_status(ref, dest, n, porcelain);
723         }
724
725         for (ref = refs; ref; ref = ref->next)
726                 if (ref->status == REF_STATUS_OK)
727                         n += print_one_push_status(ref, dest, n, porcelain);
728
729         *nonfastforward = 0;
730         for (ref = refs; ref; ref = ref->next) {
731                 if (ref->status != REF_STATUS_NONE &&
732                     ref->status != REF_STATUS_UPTODATE &&
733                     ref->status != REF_STATUS_OK)
734                         n += print_one_push_status(ref, dest, n, porcelain);
735                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
736                         *nonfastforward = 1;
737         }
738 }
739
740 void transport_verify_remote_names(int nr_heads, const char **heads)
741 {
742         int i;
743
744         for (i = 0; i < nr_heads; i++) {
745                 const char *local = heads[i];
746                 const char *remote = strrchr(heads[i], ':');
747
748                 if (*local == '+')
749                         local++;
750
751                 /* A matching refspec is okay.  */
752                 if (remote == local && remote[1] == '\0')
753                         continue;
754
755                 remote = remote ? (remote + 1) : local;
756                 switch (check_ref_format(remote)) {
757                 case 0: /* ok */
758                 case CHECK_REF_FORMAT_ONELEVEL:
759                         /* ok but a single level -- that is fine for
760                          * a match pattern.
761                          */
762                 case CHECK_REF_FORMAT_WILDCARD:
763                         /* ok but ends with a pattern-match character */
764                         continue;
765                 }
766                 die("remote part of refspec is not a valid name in %s",
767                     heads[i]);
768         }
769 }
770
771 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
772 {
773         struct git_transport_data *data = transport->data;
774         struct send_pack_args args;
775         int ret;
776
777         if (!data->got_remote_heads) {
778                 struct ref *tmp_refs;
779                 connect_setup(transport, 1, 0);
780
781                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
782                                  NULL);
783                 data->got_remote_heads = 1;
784         }
785
786         memset(&args, 0, sizeof(args));
787         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
788         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
789         args.use_thin_pack = data->options.thin;
790         args.verbose = (transport->verbose > 0);
791         args.quiet = (transport->verbose < 0);
792         args.progress = transport->progress;
793         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
794         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
795
796         ret = send_pack(&args, data->fd, data->conn, remote_refs,
797                         &data->extra_have);
798
799         close(data->fd[1]);
800         close(data->fd[0]);
801         ret |= finish_connect(data->conn);
802         data->conn = NULL;
803         data->got_remote_heads = 0;
804
805         return ret;
806 }
807
808 static int connect_git(struct transport *transport, const char *name,
809                        const char *executable, int fd[2])
810 {
811         struct git_transport_data *data = transport->data;
812         data->conn = git_connect(data->fd, transport->url,
813                                  executable, 0);
814         fd[0] = data->fd[0];
815         fd[1] = data->fd[1];
816         return 0;
817 }
818
819 static int disconnect_git(struct transport *transport)
820 {
821         struct git_transport_data *data = transport->data;
822         if (data->conn) {
823                 if (data->got_remote_heads)
824                         packet_flush(data->fd[1]);
825                 close(data->fd[0]);
826                 close(data->fd[1]);
827                 finish_connect(data->conn);
828         }
829
830         free(data);
831         return 0;
832 }
833
834 void transport_take_over(struct transport *transport,
835                          struct child_process *child)
836 {
837         struct git_transport_data *data;
838
839         if (!transport->smart_options)
840                 die("Bug detected: Taking over transport requires non-NULL "
841                     "smart_options field.");
842
843         data = xcalloc(1, sizeof(*data));
844         data->options = *transport->smart_options;
845         data->conn = child;
846         data->fd[0] = data->conn->out;
847         data->fd[1] = data->conn->in;
848         data->got_remote_heads = 0;
849         transport->data = data;
850
851         transport->set_option = NULL;
852         transport->get_refs_list = get_refs_via_connect;
853         transport->fetch = fetch_refs_via_pack;
854         transport->push = NULL;
855         transport->push_refs = git_transport_push;
856         transport->disconnect = disconnect_git;
857         transport->smart_options = &(data->options);
858 }
859
860 static int is_local(const char *url)
861 {
862         const char *colon = strchr(url, ':');
863         const char *slash = strchr(url, '/');
864         return !colon || (slash && slash < colon) ||
865                 has_dos_drive_prefix(url);
866 }
867
868 static int is_file(const char *url)
869 {
870         struct stat buf;
871         if (stat(url, &buf))
872                 return 0;
873         return S_ISREG(buf.st_mode);
874 }
875
876 static int external_specification_len(const char *url)
877 {
878         return strchr(url, ':') - url;
879 }
880
881 struct transport *transport_get(struct remote *remote, const char *url)
882 {
883         const char *helper;
884         struct transport *ret = xcalloc(1, sizeof(*ret));
885
886         ret->progress = isatty(2);
887
888         if (!remote)
889                 die("No remote provided to transport_get()");
890
891         ret->got_remote_refs = 0;
892         ret->remote = remote;
893         helper = remote->foreign_vcs;
894
895         if (!url && remote->url)
896                 url = remote->url[0];
897         ret->url = url;
898
899         /* maybe it is a foreign URL? */
900         if (url) {
901                 const char *p = url;
902
903                 while (is_urlschemechar(p == url, *p))
904                         p++;
905                 if (!prefixcmp(p, "::"))
906                         helper = xstrndup(url, p - url);
907         }
908
909         if (helper) {
910                 transport_helper_init(ret, helper);
911         } else if (!prefixcmp(url, "rsync:")) {
912                 ret->get_refs_list = get_refs_via_rsync;
913                 ret->fetch = fetch_objs_via_rsync;
914                 ret->push = rsync_transport_push;
915                 ret->smart_options = NULL;
916         } else if (is_local(url) && is_file(url)) {
917                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
918                 ret->data = data;
919                 ret->get_refs_list = get_refs_from_bundle;
920                 ret->fetch = fetch_refs_from_bundle;
921                 ret->disconnect = close_bundle;
922                 ret->smart_options = NULL;
923         } else if (!is_url(url)
924                 || !prefixcmp(url, "file://")
925                 || !prefixcmp(url, "git://")
926                 || !prefixcmp(url, "ssh://")
927                 || !prefixcmp(url, "git+ssh://")
928                 || !prefixcmp(url, "ssh+git://")) {
929                 /* These are builtin smart transports. */
930                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
931                 ret->data = data;
932                 ret->set_option = NULL;
933                 ret->get_refs_list = get_refs_via_connect;
934                 ret->fetch = fetch_refs_via_pack;
935                 ret->push_refs = git_transport_push;
936                 ret->connect = connect_git;
937                 ret->disconnect = disconnect_git;
938                 ret->smart_options = &(data->options);
939
940                 data->conn = NULL;
941                 data->got_remote_heads = 0;
942         } else {
943                 /* Unknown protocol in URL. Pass to external handler. */
944                 int len = external_specification_len(url);
945                 char *handler = xmalloc(len + 1);
946                 handler[len] = 0;
947                 strncpy(handler, url, len);
948                 transport_helper_init(ret, handler);
949         }
950
951         if (ret->smart_options) {
952                 ret->smart_options->thin = 1;
953                 ret->smart_options->uploadpack = "git-upload-pack";
954                 if (remote->uploadpack)
955                         ret->smart_options->uploadpack = remote->uploadpack;
956                 ret->smart_options->receivepack = "git-receive-pack";
957                 if (remote->receivepack)
958                         ret->smart_options->receivepack = remote->receivepack;
959         }
960
961         return ret;
962 }
963
964 int transport_set_option(struct transport *transport,
965                          const char *name, const char *value)
966 {
967         int git_reports = 1, protocol_reports = 1;
968
969         if (transport->smart_options)
970                 git_reports = set_git_option(transport->smart_options,
971                                              name, value);
972
973         if (transport->set_option)
974                 protocol_reports = transport->set_option(transport, name,
975                                                         value);
976
977         /* If either report is 0, report 0 (success). */
978         if (!git_reports || !protocol_reports)
979                 return 0;
980         /* If either reports -1 (invalid value), report -1. */
981         if ((git_reports == -1) || (protocol_reports == -1))
982                 return -1;
983         /* Otherwise if both report unknown, report unknown. */
984         return 1;
985 }
986
987 void transport_set_verbosity(struct transport *transport, int verbosity,
988         int force_progress)
989 {
990         if (verbosity >= 2)
991                 transport->verbose = verbosity <= 3 ? verbosity : 3;
992         if (verbosity < 0)
993                 transport->verbose = -1;
994
995         /**
996          * Rules used to determine whether to report progress (processing aborts
997          * when a rule is satisfied):
998          *
999          *   1. Report progress, if force_progress is 1 (ie. --progress).
1000          *   2. Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1001          *   3. Report progress if isatty(2) is 1.
1002          **/
1003         transport->progress = force_progress || (verbosity >= 0 && isatty(2));
1004 }
1005
1006 int transport_push(struct transport *transport,
1007                    int refspec_nr, const char **refspec, int flags,
1008                    int *nonfastforward)
1009 {
1010         *nonfastforward = 0;
1011         transport_verify_remote_names(refspec_nr, refspec);
1012
1013         if (transport->push) {
1014                 /* Maybe FIXME. But no important transport uses this case. */
1015                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1016                         die("This transport does not support using --set-upstream");
1017
1018                 return transport->push(transport, refspec_nr, refspec, flags);
1019         } else if (transport->push_refs) {
1020                 struct ref *remote_refs =
1021                         transport->get_refs_list(transport, 1);
1022                 struct ref *local_refs = get_local_heads();
1023                 int match_flags = MATCH_REFS_NONE;
1024                 int verbose = (transport->verbose > 0);
1025                 int quiet = (transport->verbose < 0);
1026                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1027                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1028                 int push_ret, ret, err;
1029
1030                 if (flags & TRANSPORT_PUSH_ALL)
1031                         match_flags |= MATCH_REFS_ALL;
1032                 if (flags & TRANSPORT_PUSH_MIRROR)
1033                         match_flags |= MATCH_REFS_MIRROR;
1034
1035                 if (match_refs(local_refs, &remote_refs,
1036                                refspec_nr, refspec, match_flags)) {
1037                         return -1;
1038                 }
1039
1040                 set_ref_status_for_push(remote_refs,
1041                         flags & TRANSPORT_PUSH_MIRROR,
1042                         flags & TRANSPORT_PUSH_FORCE);
1043
1044                 push_ret = transport->push_refs(transport, remote_refs, flags);
1045                 err = push_had_errors(remote_refs);
1046                 ret = push_ret | err;
1047
1048                 if (!quiet || err)
1049                         transport_print_push_status(transport->url, remote_refs,
1050                                         verbose | porcelain, porcelain,
1051                                         nonfastforward);
1052
1053                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1054                         set_upstreams(transport, remote_refs, pretend);
1055
1056                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1057                         struct ref *ref;
1058                         for (ref = remote_refs; ref; ref = ref->next)
1059                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1060                 }
1061
1062                 if (porcelain && !push_ret)
1063                         puts("Done");
1064                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1065                         fprintf(stderr, "Everything up-to-date\n");
1066
1067                 return ret;
1068         }
1069         return 1;
1070 }
1071
1072 const struct ref *transport_get_remote_refs(struct transport *transport)
1073 {
1074         if (!transport->got_remote_refs) {
1075                 transport->remote_refs = transport->get_refs_list(transport, 0);
1076                 transport->got_remote_refs = 1;
1077         }
1078
1079         return transport->remote_refs;
1080 }
1081
1082 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1083 {
1084         int rc;
1085         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1086         struct ref **heads = NULL;
1087         struct ref *rm;
1088
1089         for (rm = refs; rm; rm = rm->next) {
1090                 nr_refs++;
1091                 if (rm->peer_ref &&
1092                     !is_null_sha1(rm->old_sha1) &&
1093                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1094                         continue;
1095                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1096                 heads[nr_heads++] = rm;
1097         }
1098
1099         if (!nr_heads) {
1100                 /*
1101                  * When deepening of a shallow repository is requested,
1102                  * then local and remote refs are likely to still be equal.
1103                  * Just feed them all to the fetch method in that case.
1104                  * This condition shouldn't be met in a non-deepening fetch
1105                  * (see builtin-fetch.c:quickfetch()).
1106                  */
1107                 heads = xmalloc(nr_refs * sizeof(*heads));
1108                 for (rm = refs; rm; rm = rm->next)
1109                         heads[nr_heads++] = rm;
1110         }
1111
1112         rc = transport->fetch(transport, nr_heads, heads);
1113
1114         free(heads);
1115         return rc;
1116 }
1117
1118 void transport_unlock_pack(struct transport *transport)
1119 {
1120         if (transport->pack_lockfile) {
1121                 unlink_or_warn(transport->pack_lockfile);
1122                 free(transport->pack_lockfile);
1123                 transport->pack_lockfile = NULL;
1124         }
1125 }
1126
1127 int transport_connect(struct transport *transport, const char *name,
1128                       const char *exec, int fd[2])
1129 {
1130         if (transport->connect)
1131                 return transport->connect(transport, name, exec, fd);
1132         else
1133                 die("Operation not supported by protocol");
1134 }
1135
1136 int transport_disconnect(struct transport *transport)
1137 {
1138         int ret = 0;
1139         if (transport->disconnect)
1140                 ret = transport->disconnect(transport);
1141         free(transport);
1142         return ret;
1143 }
1144
1145 /*
1146  * Strip username (and password) from an url and return
1147  * it in a newly allocated string.
1148  */
1149 char *transport_anonymize_url(const char *url)
1150 {
1151         char *anon_url, *scheme_prefix, *anon_part;
1152         size_t anon_len, prefix_len = 0;
1153
1154         anon_part = strchr(url, '@');
1155         if (is_local(url) || !anon_part)
1156                 goto literal_copy;
1157
1158         anon_len = strlen(++anon_part);
1159         scheme_prefix = strstr(url, "://");
1160         if (!scheme_prefix) {
1161                 if (!strchr(anon_part, ':'))
1162                         /* cannot be "me@there:/path/name" */
1163                         goto literal_copy;
1164         } else {
1165                 const char *cp;
1166                 /* make sure scheme is reasonable */
1167                 for (cp = url; cp < scheme_prefix; cp++) {
1168                         switch (*cp) {
1169                                 /* RFC 1738 2.1 */
1170                         case '+': case '.': case '-':
1171                                 break; /* ok */
1172                         default:
1173                                 if (isalnum(*cp))
1174                                         break;
1175                                 /* it isn't */
1176                                 goto literal_copy;
1177                         }
1178                 }
1179                 /* @ past the first slash does not count */
1180                 cp = strchr(scheme_prefix + 3, '/');
1181                 if (cp && cp < anon_part)
1182                         goto literal_copy;
1183                 prefix_len = scheme_prefix - url + 3;
1184         }
1185         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1186         memcpy(anon_url, url, prefix_len);
1187         memcpy(anon_url + prefix_len, anon_part, anon_len);
1188         return anon_url;
1189 literal_copy:
1190         return xstrdup(url);
1191 }
1192
1193 int refs_from_alternate_cb(struct alternate_object_database *e, void *cb)
1194 {
1195         char *other;
1196         size_t len;
1197         struct remote *remote;
1198         struct transport *transport;
1199         const struct ref *extra;
1200         alternate_ref_fn *ref_fn = cb;
1201
1202         e->name[-1] = '\0';
1203         other = xstrdup(real_path(e->base));
1204         e->name[-1] = '/';
1205         len = strlen(other);
1206
1207         while (other[len-1] == '/')
1208                 other[--len] = '\0';
1209         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1210                 return 0;
1211         /* Is this a git repository with refs? */
1212         memcpy(other + len - 8, "/refs", 6);
1213         if (!is_directory(other))
1214                 return 0;
1215         other[len - 8] = '\0';
1216         remote = remote_get(other);
1217         transport = transport_get(remote, other);
1218         for (extra = transport_get_remote_refs(transport);
1219              extra;
1220              extra = extra->next)
1221                 ref_fn(extra, NULL);
1222         transport_disconnect(transport);
1223         free(other);
1224         return 0;
1225 }