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