Merge branch 'maint'
[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 ("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 ("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
443         struct active_request_slot *slot;
444         struct slot_results results;
445
446         struct ref *refs = NULL;
447         struct ref *ref = NULL;
448         struct ref *last_ref = NULL;
449
450         struct walker *walker;
451
452         if (for_push)
453                 return NULL;
454
455         if (!transport->data)
456                 transport->data = get_http_walker(transport->url,
457                                                 transport->remote);
458
459         walker = transport->data;
460
461         refs_url = xmalloc(strlen(transport->url) + 11);
462         sprintf(refs_url, "%s/info/refs", transport->url);
463
464         slot = get_active_slot();
465         slot->results = &results;
466         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
467         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
468         curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
469         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
470
471         if (start_active_slot(slot)) {
472                 run_active_slot(slot);
473                 if (results.curl_result != CURLE_OK) {
474                         strbuf_release(&buffer);
475                         if (missing_target(&results))
476                                 die("%s not found: did you run git update-server-info on the server?", refs_url);
477                         else
478                                 die("%s download error - %s", refs_url, curl_errorstr);
479                 }
480         } else {
481                 strbuf_release(&buffer);
482                 die("Unable to start HTTP request");
483         }
484
485         data = buffer.buf;
486         start = NULL;
487         mid = data;
488         while (i < buffer.len) {
489                 if (!start)
490                         start = &data[i];
491                 if (data[i] == '\t')
492                         mid = &data[i];
493                 if (data[i] == '\n') {
494                         data[i] = 0;
495                         ref_name = mid + 1;
496                         ref = xmalloc(sizeof(struct ref) +
497                                       strlen(ref_name) + 1);
498                         memset(ref, 0, sizeof(struct ref));
499                         strcpy(ref->name, ref_name);
500                         get_sha1_hex(start, ref->old_sha1);
501                         if (!refs)
502                                 refs = ref;
503                         if (last_ref)
504                                 last_ref->next = ref;
505                         last_ref = ref;
506                         start = NULL;
507                 }
508                 i++;
509         }
510
511         strbuf_release(&buffer);
512
513         ref = alloc_ref("HEAD");
514         if (!walker->fetch_ref(walker, ref) &&
515             !resolve_remote_symref(ref, refs)) {
516                 ref->next = refs;
517                 refs = ref;
518         } else {
519                 free(ref);
520         }
521
522         return refs;
523 }
524
525 static int fetch_objs_via_curl(struct transport *transport,
526                                  int nr_objs, const struct ref **to_fetch)
527 {
528         if (!transport->data)
529                 transport->data = get_http_walker(transport->url,
530                                                 transport->remote);
531         return fetch_objs_via_walker(transport, nr_objs, to_fetch);
532 }
533
534 #endif
535
536 struct bundle_transport_data {
537         int fd;
538         struct bundle_header header;
539 };
540
541 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
542 {
543         struct bundle_transport_data *data = transport->data;
544         struct ref *result = NULL;
545         int i;
546
547         if (for_push)
548                 return NULL;
549
550         if (data->fd > 0)
551                 close(data->fd);
552         data->fd = read_bundle_header(transport->url, &data->header);
553         if (data->fd < 0)
554                 die ("Could not read bundle '%s'.", transport->url);
555         for (i = 0; i < data->header.references.nr; i++) {
556                 struct ref_list_entry *e = data->header.references.list + i;
557                 struct ref *ref = alloc_ref(e->name);
558                 hashcpy(ref->old_sha1, e->sha1);
559                 ref->next = result;
560                 result = ref;
561         }
562         return result;
563 }
564
565 static int fetch_refs_from_bundle(struct transport *transport,
566                                int nr_heads, const struct ref **to_fetch)
567 {
568         struct bundle_transport_data *data = transport->data;
569         return unbundle(&data->header, data->fd);
570 }
571
572 static int close_bundle(struct transport *transport)
573 {
574         struct bundle_transport_data *data = transport->data;
575         if (data->fd > 0)
576                 close(data->fd);
577         free(data);
578         return 0;
579 }
580
581 struct git_transport_data {
582         unsigned thin : 1;
583         unsigned keep : 1;
584         unsigned followtags : 1;
585         int depth;
586         struct child_process *conn;
587         int fd[2];
588         const char *uploadpack;
589         const char *receivepack;
590         struct extra_have_objects extra_have;
591 };
592
593 static int set_git_option(struct transport *connection,
594                           const char *name, const char *value)
595 {
596         struct git_transport_data *data = connection->data;
597         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
598                 data->uploadpack = value;
599                 return 0;
600         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
601                 data->receivepack = value;
602                 return 0;
603         } else if (!strcmp(name, TRANS_OPT_THIN)) {
604                 data->thin = !!value;
605                 return 0;
606         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
607                 data->followtags = !!value;
608                 return 0;
609         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
610                 data->keep = !!value;
611                 return 0;
612         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
613                 if (!value)
614                         data->depth = 0;
615                 else
616                         data->depth = atoi(value);
617                 return 0;
618         }
619         return 1;
620 }
621
622 static int connect_setup(struct transport *transport, int for_push, int verbose)
623 {
624         struct git_transport_data *data = transport->data;
625         data->conn = git_connect(data->fd, transport->url,
626                                  for_push ? data->receivepack : data->uploadpack,
627                                  verbose ? CONNECT_VERBOSE : 0);
628         return 0;
629 }
630
631 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
632 {
633         struct git_transport_data *data = transport->data;
634         struct ref *refs;
635
636         connect_setup(transport, for_push, 0);
637         get_remote_heads(data->fd[0], &refs, 0, NULL,
638                          for_push ? REF_NORMAL : 0, &data->extra_have);
639
640         return refs;
641 }
642
643 static int fetch_refs_via_pack(struct transport *transport,
644                                int nr_heads, const struct ref **to_fetch)
645 {
646         struct git_transport_data *data = transport->data;
647         char **heads = xmalloc(nr_heads * sizeof(*heads));
648         char **origh = xmalloc(nr_heads * sizeof(*origh));
649         const struct ref *refs;
650         char *dest = xstrdup(transport->url);
651         struct fetch_pack_args args;
652         int i;
653         struct ref *refs_tmp = NULL;
654
655         memset(&args, 0, sizeof(args));
656         args.uploadpack = data->uploadpack;
657         args.keep_pack = data->keep;
658         args.lock_pack = 1;
659         args.use_thin_pack = data->thin;
660         args.include_tag = data->followtags;
661         args.verbose = (transport->verbose > 0);
662         args.quiet = (transport->verbose < 0);
663         args.no_progress = args.quiet || (!transport->progress && !isatty(1));
664         args.depth = data->depth;
665
666         for (i = 0; i < nr_heads; i++)
667                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
668
669         if (!data->conn) {
670                 connect_setup(transport, 0, 0);
671                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
672         }
673
674         refs = fetch_pack(&args, data->fd, data->conn,
675                           refs_tmp ? refs_tmp : transport->remote_refs,
676                           dest, nr_heads, heads, &transport->pack_lockfile);
677         close(data->fd[0]);
678         close(data->fd[1]);
679         if (finish_connect(data->conn))
680                 refs = NULL;
681         data->conn = NULL;
682
683         free_refs(refs_tmp);
684
685         for (i = 0; i < nr_heads; i++)
686                 free(origh[i]);
687         free(origh);
688         free(heads);
689         free(dest);
690         return (refs ? 0 : -1);
691 }
692
693 static int refs_pushed(struct ref *ref)
694 {
695         for (; ref; ref = ref->next) {
696                 switch(ref->status) {
697                 case REF_STATUS_NONE:
698                 case REF_STATUS_UPTODATE:
699                         break;
700                 default:
701                         return 1;
702                 }
703         }
704         return 0;
705 }
706
707 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
708 {
709         struct refspec rs;
710
711         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
712                 return;
713
714         rs.src = ref->name;
715         rs.dst = NULL;
716
717         if (!remote_find_tracking(remote, &rs)) {
718                 if (verbose)
719                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
720                 if (ref->deletion) {
721                         delete_ref(rs.dst, NULL, 0);
722                 } else
723                         update_ref("update by push", rs.dst,
724                                         ref->new_sha1, NULL, 0, 0);
725                 free(rs.dst);
726         }
727 }
728
729 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
730
731 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
732 {
733         fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
734         if (from)
735                 fprintf(stderr, "%s -> %s", prettify_ref(from), prettify_ref(to));
736         else
737                 fputs(prettify_ref(to), stderr);
738         if (msg) {
739                 fputs(" (", stderr);
740                 fputs(msg, stderr);
741                 fputc(')', stderr);
742         }
743         fputc('\n', stderr);
744 }
745
746 static const char *status_abbrev(unsigned char sha1[20])
747 {
748         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
749 }
750
751 static void print_ok_ref_status(struct ref *ref)
752 {
753         if (ref->deletion)
754                 print_ref_status('-', "[deleted]", ref, NULL, NULL);
755         else if (is_null_sha1(ref->old_sha1))
756                 print_ref_status('*',
757                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
758                           "[new branch]"),
759                         ref, ref->peer_ref, NULL);
760         else {
761                 char quickref[84];
762                 char type;
763                 const char *msg;
764
765                 strcpy(quickref, status_abbrev(ref->old_sha1));
766                 if (ref->nonfastforward) {
767                         strcat(quickref, "...");
768                         type = '+';
769                         msg = "forced update";
770                 } else {
771                         strcat(quickref, "..");
772                         type = ' ';
773                         msg = NULL;
774                 }
775                 strcat(quickref, status_abbrev(ref->new_sha1));
776
777                 print_ref_status(type, quickref, ref, ref->peer_ref, msg);
778         }
779 }
780
781 static int print_one_push_status(struct ref *ref, const char *dest, int count)
782 {
783         if (!count)
784                 fprintf(stderr, "To %s\n", dest);
785
786         switch(ref->status) {
787         case REF_STATUS_NONE:
788                 print_ref_status('X', "[no match]", ref, NULL, NULL);
789                 break;
790         case REF_STATUS_REJECT_NODELETE:
791                 print_ref_status('!', "[rejected]", ref, NULL,
792                                 "remote does not support deleting refs");
793                 break;
794         case REF_STATUS_UPTODATE:
795                 print_ref_status('=', "[up to date]", ref,
796                                 ref->peer_ref, NULL);
797                 break;
798         case REF_STATUS_REJECT_NONFASTFORWARD:
799                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
800                                 "non-fast forward");
801                 break;
802         case REF_STATUS_REMOTE_REJECT:
803                 print_ref_status('!', "[remote rejected]", ref,
804                                 ref->deletion ? NULL : ref->peer_ref,
805                                 ref->remote_status);
806                 break;
807         case REF_STATUS_EXPECTING_REPORT:
808                 print_ref_status('!', "[remote failure]", ref,
809                                 ref->deletion ? NULL : ref->peer_ref,
810                                 "remote failed to report status");
811                 break;
812         case REF_STATUS_OK:
813                 print_ok_ref_status(ref);
814                 break;
815         }
816
817         return 1;
818 }
819
820 static void print_push_status(const char *dest, struct ref *refs, int verbose)
821 {
822         struct ref *ref;
823         int n = 0;
824
825         if (verbose) {
826                 for (ref = refs; ref; ref = ref->next)
827                         if (ref->status == REF_STATUS_UPTODATE)
828                                 n += print_one_push_status(ref, dest, n);
829         }
830
831         for (ref = refs; ref; ref = ref->next)
832                 if (ref->status == REF_STATUS_OK)
833                         n += print_one_push_status(ref, dest, n);
834
835         for (ref = refs; ref; ref = ref->next) {
836                 if (ref->status != REF_STATUS_NONE &&
837                     ref->status != REF_STATUS_UPTODATE &&
838                     ref->status != REF_STATUS_OK)
839                         n += print_one_push_status(ref, dest, n);
840         }
841 }
842
843 static void verify_remote_names(int nr_heads, const char **heads)
844 {
845         int i;
846
847         for (i = 0; i < nr_heads; i++) {
848                 const char *local = heads[i];
849                 const char *remote = strrchr(heads[i], ':');
850
851                 if (*local == '+')
852                         local++;
853
854                 /* A matching refspec is okay.  */
855                 if (remote == local && remote[1] == '\0')
856                         continue;
857
858                 remote = remote ? (remote + 1) : local;
859                 switch (check_ref_format(remote)) {
860                 case 0: /* ok */
861                 case CHECK_REF_FORMAT_ONELEVEL:
862                         /* ok but a single level -- that is fine for
863                          * a match pattern.
864                          */
865                 case CHECK_REF_FORMAT_WILDCARD:
866                         /* ok but ends with a pattern-match character */
867                         continue;
868                 }
869                 die("remote part of refspec is not a valid name in %s",
870                     heads[i]);
871         }
872 }
873
874 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
875 {
876         struct git_transport_data *data = transport->data;
877         struct send_pack_args args;
878         int ret;
879
880         if (!data->conn) {
881                 struct ref *tmp_refs;
882                 connect_setup(transport, 1, 0);
883
884                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
885                                  NULL);
886         }
887
888         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
889         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
890         args.use_thin_pack = data->thin;
891         args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
892         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
893
894         ret = send_pack(&args, data->fd, data->conn, remote_refs,
895                         &data->extra_have);
896
897         close(data->fd[1]);
898         close(data->fd[0]);
899         ret |= finish_connect(data->conn);
900         data->conn = NULL;
901
902         return ret;
903 }
904
905 static int disconnect_git(struct transport *transport)
906 {
907         struct git_transport_data *data = transport->data;
908         if (data->conn) {
909                 packet_flush(data->fd[1]);
910                 close(data->fd[0]);
911                 close(data->fd[1]);
912                 finish_connect(data->conn);
913         }
914
915         free(data);
916         return 0;
917 }
918
919 static int is_local(const char *url)
920 {
921         const char *colon = strchr(url, ':');
922         const char *slash = strchr(url, '/');
923         return !colon || (slash && slash < colon) ||
924                 has_dos_drive_prefix(url);
925 }
926
927 static int is_file(const char *url)
928 {
929         struct stat buf;
930         if (stat(url, &buf))
931                 return 0;
932         return S_ISREG(buf.st_mode);
933 }
934
935 struct transport *transport_get(struct remote *remote, const char *url)
936 {
937         struct transport *ret = xcalloc(1, sizeof(*ret));
938
939         ret->remote = remote;
940         ret->url = url;
941
942         if (!prefixcmp(url, "rsync:")) {
943                 ret->get_refs_list = get_refs_via_rsync;
944                 ret->fetch = fetch_objs_via_rsync;
945                 ret->push = rsync_transport_push;
946
947         } else if (!prefixcmp(url, "http://")
948                 || !prefixcmp(url, "https://")
949                 || !prefixcmp(url, "ftp://")) {
950 #ifdef NO_CURL
951                 error("git was compiled without libcurl support.");
952 #else
953                 ret->get_refs_list = get_refs_via_curl;
954                 ret->fetch = fetch_objs_via_curl;
955                 ret->push = curl_transport_push;
956 #endif
957                 ret->disconnect = disconnect_walker;
958
959         } else if (is_local(url) && is_file(url)) {
960                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
961                 ret->data = data;
962                 ret->get_refs_list = get_refs_from_bundle;
963                 ret->fetch = fetch_refs_from_bundle;
964                 ret->disconnect = close_bundle;
965
966         } else {
967                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
968                 ret->data = data;
969                 ret->set_option = set_git_option;
970                 ret->get_refs_list = get_refs_via_connect;
971                 ret->fetch = fetch_refs_via_pack;
972                 ret->push_refs = git_transport_push;
973                 ret->disconnect = disconnect_git;
974
975                 data->thin = 1;
976                 data->conn = NULL;
977                 data->uploadpack = "git-upload-pack";
978                 if (remote && remote->uploadpack)
979                         data->uploadpack = remote->uploadpack;
980                 data->receivepack = "git-receive-pack";
981                 if (remote && remote->receivepack)
982                         data->receivepack = remote->receivepack;
983         }
984
985         return ret;
986 }
987
988 int transport_set_option(struct transport *transport,
989                          const char *name, const char *value)
990 {
991         if (transport->set_option)
992                 return transport->set_option(transport, name, value);
993         return 1;
994 }
995
996 int transport_push(struct transport *transport,
997                    int refspec_nr, const char **refspec, int flags)
998 {
999         verify_remote_names(refspec_nr, refspec);
1000
1001         if (transport->push)
1002                 return transport->push(transport, refspec_nr, refspec, flags);
1003         if (transport->push_refs) {
1004                 struct ref *remote_refs =
1005                         transport->get_refs_list(transport, 1);
1006                 struct ref **remote_tail;
1007                 struct ref *local_refs = get_local_heads();
1008                 int match_flags = MATCH_REFS_NONE;
1009                 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1010                 int ret;
1011
1012                 if (flags & TRANSPORT_PUSH_ALL)
1013                         match_flags |= MATCH_REFS_ALL;
1014                 if (flags & TRANSPORT_PUSH_MIRROR)
1015                         match_flags |= MATCH_REFS_MIRROR;
1016
1017                 remote_tail = &remote_refs;
1018                 while (*remote_tail)
1019                         remote_tail = &((*remote_tail)->next);
1020                 if (match_refs(local_refs, remote_refs, &remote_tail,
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);
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(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 }