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