Merge branch 'ta/string-list-init'
[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 "remote.h"
7 #include "connect.h"
8 #include "send-pack.h"
9 #include "walker.h"
10 #include "bundle.h"
11 #include "dir.h"
12 #include "refs.h"
13 #include "branch.h"
14 #include "url.h"
15 #include "submodule.h"
16 #include "string-list.h"
17 #include "sha1-array.h"
18
19 /* rsync support */
20
21 /*
22  * We copy packed-refs and refs/ into a temporary file, then read the
23  * loose refs recursively (sorting whenever possible), and then inserting
24  * those packed refs that are not yet in the list (not validating, but
25  * assuming that the file is sorted).
26  *
27  * Appears refactoring this from refs.c is too cumbersome.
28  */
29
30 static int str_cmp(const void *a, const void *b)
31 {
32         const char *s1 = a;
33         const char *s2 = b;
34
35         return strcmp(s1, s2);
36 }
37
38 /* path->buf + name_offset is expected to point to "refs/" */
39
40 static int read_loose_refs(struct strbuf *path, int name_offset,
41                 struct ref **tail)
42 {
43         DIR *dir = opendir(path->buf);
44         struct dirent *de;
45         struct {
46                 char **entries;
47                 int nr, alloc;
48         } list;
49         int i, pathlen;
50
51         if (!dir)
52                 return -1;
53
54         memset (&list, 0, sizeof(list));
55
56         while ((de = readdir(dir))) {
57                 if (is_dot_or_dotdot(de->d_name))
58                         continue;
59                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
60                 list.entries[list.nr++] = xstrdup(de->d_name);
61         }
62         closedir(dir);
63
64         /* sort the list */
65
66         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
67
68         pathlen = path->len;
69         strbuf_addch(path, '/');
70
71         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
72                 strbuf_addstr(path, list.entries[i]);
73                 if (read_loose_refs(path, name_offset, tail)) {
74                         int fd = open(path->buf, O_RDONLY);
75                         char buffer[40];
76                         struct ref *next;
77
78                         if (fd < 0)
79                                 continue;
80                         next = alloc_ref(path->buf + name_offset);
81                         if (read_in_full(fd, buffer, 40) != 40 ||
82                                         get_sha1_hex(buffer, next->old_sha1)) {
83                                 close(fd);
84                                 free(next);
85                                 continue;
86                         }
87                         close(fd);
88                         (*tail)->next = next;
89                         *tail = next;
90                 }
91         }
92         strbuf_setlen(path, pathlen);
93
94         for (i = 0; i < list.nr; i++)
95                 free(list.entries[i]);
96         free(list.entries);
97
98         return 0;
99 }
100
101 /* insert the packed refs for which no loose refs were found */
102
103 static void insert_packed_refs(const char *packed_refs, struct ref **list)
104 {
105         FILE *f = fopen(packed_refs, "r");
106         static char buffer[PATH_MAX];
107
108         if (!f)
109                 return;
110
111         for (;;) {
112                 int cmp = 0; /* assigned before used */
113                 int len;
114
115                 if (!fgets(buffer, sizeof(buffer), f)) {
116                         fclose(f);
117                         return;
118                 }
119
120                 if (hexval(buffer[0]) > 0xf)
121                         continue;
122                 len = strlen(buffer);
123                 if (len && buffer[len - 1] == '\n')
124                         buffer[--len] = '\0';
125                 if (len < 41)
126                         continue;
127                 while ((*list)->next &&
128                                 (cmp = strcmp(buffer + 41,
129                                       (*list)->next->name)) > 0)
130                         list = &(*list)->next;
131                 if (!(*list)->next || cmp < 0) {
132                         struct ref *next = alloc_ref(buffer + 41);
133                         buffer[40] = '\0';
134                         if (get_sha1_hex(buffer, next->old_sha1)) {
135                                 warning ("invalid SHA-1: %s", buffer);
136                                 free(next);
137                                 continue;
138                         }
139                         next->next = (*list)->next;
140                         (*list)->next = next;
141                         list = &(*list)->next;
142                 }
143         }
144 }
145
146 static void set_upstreams(struct transport *transport, struct ref *refs,
147         int pretend)
148 {
149         struct ref *ref;
150         for (ref = refs; ref; ref = ref->next) {
151                 const char *localname;
152                 const char *tmp;
153                 const char *remotename;
154                 unsigned char sha[20];
155                 int flag = 0;
156                 /*
157                  * Check suitability for tracking. Must be successful /
158                  * already up-to-date ref create/modify (not delete).
159                  */
160                 if (ref->status != REF_STATUS_OK &&
161                         ref->status != REF_STATUS_UPTODATE)
162                         continue;
163                 if (!ref->peer_ref)
164                         continue;
165                 if (is_null_sha1(ref->new_sha1))
166                         continue;
167
168                 /* Follow symbolic refs (mainly for HEAD). */
169                 localname = ref->peer_ref->name;
170                 remotename = ref->name;
171                 tmp = resolve_ref_unsafe(localname, sha, 1, &flag);
172                 if (tmp && flag & REF_ISSYMREF &&
173                         starts_with(tmp, "refs/heads/"))
174                         localname = tmp;
175
176                 /* Both source and destination must be local branches. */
177                 if (!localname || !starts_with(localname, "refs/heads/"))
178                         continue;
179                 if (!remotename || !starts_with(remotename, "refs/heads/"))
180                         continue;
181
182                 if (!pretend)
183                         install_branch_config(BRANCH_CONFIG_VERBOSE,
184                                 localname + 11, transport->remote->name,
185                                 remotename);
186                 else
187                         printf("Would set upstream of '%s' to '%s' of '%s'\n",
188                                 localname + 11, remotename + 11,
189                                 transport->remote->name);
190         }
191 }
192
193 static const char *rsync_url(const char *url)
194 {
195         if (!starts_with(url, "rsync://"))
196                 skip_prefix(url, "rsync:", &url);
197         return url;
198 }
199
200 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
201 {
202         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
203         struct ref dummy = {NULL}, *tail = &dummy;
204         struct child_process rsync;
205         const char *args[5];
206         int temp_dir_len;
207
208         if (for_push)
209                 return NULL;
210
211         /* copy the refs to the temporary directory */
212
213         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
214         if (!mkdtemp(temp_dir.buf))
215                 die_errno ("Could not make temporary directory");
216         temp_dir_len = temp_dir.len;
217
218         strbuf_addstr(&buf, rsync_url(transport->url));
219         strbuf_addstr(&buf, "/refs");
220
221         memset(&rsync, 0, sizeof(rsync));
222         rsync.argv = args;
223         rsync.stdout_to_stderr = 1;
224         args[0] = "rsync";
225         args[1] = (transport->verbose > 1) ? "-rv" : "-r";
226         args[2] = buf.buf;
227         args[3] = temp_dir.buf;
228         args[4] = NULL;
229
230         if (run_command(&rsync))
231                 die ("Could not run rsync to get refs");
232
233         strbuf_reset(&buf);
234         strbuf_addstr(&buf, rsync_url(transport->url));
235         strbuf_addstr(&buf, "/packed-refs");
236
237         args[2] = buf.buf;
238
239         if (run_command(&rsync))
240                 die ("Could not run rsync to get refs");
241
242         /* read the copied refs */
243
244         strbuf_addstr(&temp_dir, "/refs");
245         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
246         strbuf_setlen(&temp_dir, temp_dir_len);
247
248         tail = &dummy;
249         strbuf_addstr(&temp_dir, "/packed-refs");
250         insert_packed_refs(temp_dir.buf, &tail);
251         strbuf_setlen(&temp_dir, temp_dir_len);
252
253         if (remove_dir_recursively(&temp_dir, 0))
254                 warning ("Error removing temporary directory %s.",
255                                 temp_dir.buf);
256
257         strbuf_release(&buf);
258         strbuf_release(&temp_dir);
259
260         return dummy.next;
261 }
262
263 static int fetch_objs_via_rsync(struct transport *transport,
264                                 int nr_objs, struct ref **to_fetch)
265 {
266         struct child_process rsync;
267
268         memset(&rsync, 0, sizeof(rsync));
269         rsync.stdout_to_stderr = 1;
270         argv_array_push(&rsync.args, "rsync");
271         argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
272         argv_array_push(&rsync.args, "--ignore-existing");
273         argv_array_push(&rsync.args, "--exclude");
274         argv_array_push(&rsync.args, "info");
275         argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
276         argv_array_push(&rsync.args, get_object_directory());
277
278         /* NEEDSWORK: handle one level of alternates */
279         return run_command(&rsync);
280 }
281
282 static int write_one_ref(const char *name, const unsigned char *sha1,
283                 int flags, void *data)
284 {
285         struct strbuf *buf = data;
286         int len = buf->len;
287         FILE *f;
288
289         /* when called via for_each_ref(), flags is non-zero */
290         if (flags && !starts_with(name, "refs/heads/") &&
291                         !starts_with(name, "refs/tags/"))
292                 return 0;
293
294         strbuf_addstr(buf, name);
295         if (safe_create_leading_directories(buf->buf) ||
296                         !(f = fopen(buf->buf, "w")) ||
297                         fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
298                         fclose(f))
299                 return error("problems writing temporary file %s", buf->buf);
300         strbuf_setlen(buf, len);
301         return 0;
302 }
303
304 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
305                 int refspec_nr, const char **refspec)
306 {
307         int i;
308
309         for (i = 0; i < refspec_nr; i++) {
310                 unsigned char sha1[20];
311                 char *ref;
312
313                 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
314                         return error("Could not get ref %s", refspec[i]);
315
316                 if (write_one_ref(ref, sha1, 0, temp_dir)) {
317                         free(ref);
318                         return -1;
319                 }
320                 free(ref);
321         }
322         return 0;
323 }
324
325 static int rsync_transport_push(struct transport *transport,
326                 int refspec_nr, const char **refspec, int flags)
327 {
328         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
329         int result = 0, i;
330         struct child_process rsync;
331         const char *args[10];
332
333         if (flags & TRANSPORT_PUSH_MIRROR)
334                 return error("rsync transport does not support mirror mode");
335
336         /* first push the objects */
337
338         strbuf_addstr(&buf, rsync_url(transport->url));
339         strbuf_addch(&buf, '/');
340
341         memset(&rsync, 0, sizeof(rsync));
342         rsync.argv = args;
343         rsync.stdout_to_stderr = 1;
344         i = 0;
345         args[i++] = "rsync";
346         args[i++] = "-a";
347         if (flags & TRANSPORT_PUSH_DRY_RUN)
348                 args[i++] = "--dry-run";
349         if (transport->verbose > 1)
350                 args[i++] = "-v";
351         args[i++] = "--ignore-existing";
352         args[i++] = "--exclude";
353         args[i++] = "info";
354         args[i++] = get_object_directory();
355         args[i++] = buf.buf;
356         args[i++] = NULL;
357
358         if (run_command(&rsync))
359                 return error("Could not push objects to %s",
360                                 rsync_url(transport->url));
361
362         /* copy the refs to the temporary directory; they could be packed. */
363
364         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
365         if (!mkdtemp(temp_dir.buf))
366                 die_errno ("Could not make temporary directory");
367         strbuf_addch(&temp_dir, '/');
368
369         if (flags & TRANSPORT_PUSH_ALL) {
370                 if (for_each_ref(write_one_ref, &temp_dir))
371                         return -1;
372         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
373                 return -1;
374
375         i = 2;
376         if (flags & TRANSPORT_PUSH_DRY_RUN)
377                 args[i++] = "--dry-run";
378         if (!(flags & TRANSPORT_PUSH_FORCE))
379                 args[i++] = "--ignore-existing";
380         args[i++] = temp_dir.buf;
381         args[i++] = rsync_url(transport->url);
382         args[i++] = NULL;
383         if (run_command(&rsync))
384                 result = error("Could not push to %s",
385                                 rsync_url(transport->url));
386
387         if (remove_dir_recursively(&temp_dir, 0))
388                 warning ("Could not remove temporary directory %s.",
389                                 temp_dir.buf);
390
391         strbuf_release(&buf);
392         strbuf_release(&temp_dir);
393
394         return result;
395 }
396
397 struct bundle_transport_data {
398         int fd;
399         struct bundle_header header;
400 };
401
402 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
403 {
404         struct bundle_transport_data *data = transport->data;
405         struct ref *result = NULL;
406         int i;
407
408         if (for_push)
409                 return NULL;
410
411         if (data->fd > 0)
412                 close(data->fd);
413         data->fd = read_bundle_header(transport->url, &data->header);
414         if (data->fd < 0)
415                 die ("Could not read bundle '%s'.", transport->url);
416         for (i = 0; i < data->header.references.nr; i++) {
417                 struct ref_list_entry *e = data->header.references.list + i;
418                 struct ref *ref = alloc_ref(e->name);
419                 hashcpy(ref->old_sha1, e->sha1);
420                 ref->next = result;
421                 result = ref;
422         }
423         return result;
424 }
425
426 static int fetch_refs_from_bundle(struct transport *transport,
427                                int nr_heads, struct ref **to_fetch)
428 {
429         struct bundle_transport_data *data = transport->data;
430         return unbundle(&data->header, data->fd,
431                         transport->progress ? BUNDLE_VERBOSE : 0);
432 }
433
434 static int close_bundle(struct transport *transport)
435 {
436         struct bundle_transport_data *data = transport->data;
437         if (data->fd > 0)
438                 close(data->fd);
439         free(data);
440         return 0;
441 }
442
443 struct git_transport_data {
444         struct git_transport_options options;
445         struct child_process *conn;
446         int fd[2];
447         unsigned got_remote_heads : 1;
448         struct sha1_array extra_have;
449         struct sha1_array shallow;
450 };
451
452 static int set_git_option(struct git_transport_options *opts,
453                           const char *name, const char *value)
454 {
455         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
456                 opts->uploadpack = value;
457                 return 0;
458         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
459                 opts->receivepack = value;
460                 return 0;
461         } else if (!strcmp(name, TRANS_OPT_THIN)) {
462                 opts->thin = !!value;
463                 return 0;
464         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
465                 opts->followtags = !!value;
466                 return 0;
467         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
468                 opts->keep = !!value;
469                 return 0;
470         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
471                 opts->update_shallow = !!value;
472                 return 0;
473         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
474                 if (!value)
475                         opts->depth = 0;
476                 else {
477                         char *end;
478                         opts->depth = strtol(value, &end, 0);
479                         if (*end)
480                                 die("transport: invalid depth option '%s'", value);
481                 }
482                 return 0;
483         }
484         return 1;
485 }
486
487 static int connect_setup(struct transport *transport, int for_push, int verbose)
488 {
489         struct git_transport_data *data = transport->data;
490
491         if (data->conn)
492                 return 0;
493
494         data->conn = git_connect(data->fd, transport->url,
495                                  for_push ? data->options.receivepack :
496                                  data->options.uploadpack,
497                                  verbose ? CONNECT_VERBOSE : 0);
498
499         return 0;
500 }
501
502 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
503 {
504         struct git_transport_data *data = transport->data;
505         struct ref *refs;
506
507         connect_setup(transport, for_push, 0);
508         get_remote_heads(data->fd[0], NULL, 0, &refs,
509                          for_push ? REF_NORMAL : 0,
510                          &data->extra_have,
511                          &data->shallow);
512         data->got_remote_heads = 1;
513
514         return refs;
515 }
516
517 static int fetch_refs_via_pack(struct transport *transport,
518                                int nr_heads, struct ref **to_fetch)
519 {
520         struct git_transport_data *data = transport->data;
521         const struct ref *refs;
522         char *dest = xstrdup(transport->url);
523         struct fetch_pack_args args;
524         struct ref *refs_tmp = NULL;
525
526         memset(&args, 0, sizeof(args));
527         args.uploadpack = data->options.uploadpack;
528         args.keep_pack = data->options.keep;
529         args.lock_pack = 1;
530         args.use_thin_pack = data->options.thin;
531         args.include_tag = data->options.followtags;
532         args.verbose = (transport->verbose > 1);
533         args.quiet = (transport->verbose < 0);
534         args.no_progress = !transport->progress;
535         args.depth = data->options.depth;
536         args.check_self_contained_and_connected =
537                 data->options.check_self_contained_and_connected;
538         args.cloning = transport->cloning;
539         args.update_shallow = data->options.update_shallow;
540
541         if (!data->got_remote_heads) {
542                 connect_setup(transport, 0, 0);
543                 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
544                                  NULL, &data->shallow);
545                 data->got_remote_heads = 1;
546         }
547
548         refs = fetch_pack(&args, data->fd, data->conn,
549                           refs_tmp ? refs_tmp : transport->remote_refs,
550                           dest, to_fetch, nr_heads, &data->shallow,
551                           &transport->pack_lockfile);
552         close(data->fd[0]);
553         close(data->fd[1]);
554         if (finish_connect(data->conn))
555                 refs = NULL;
556         data->conn = NULL;
557         data->got_remote_heads = 0;
558         data->options.self_contained_and_connected =
559                 args.self_contained_and_connected;
560
561         free_refs(refs_tmp);
562
563         free(dest);
564         return (refs ? 0 : -1);
565 }
566
567 static int push_had_errors(struct ref *ref)
568 {
569         for (; ref; ref = ref->next) {
570                 switch (ref->status) {
571                 case REF_STATUS_NONE:
572                 case REF_STATUS_UPTODATE:
573                 case REF_STATUS_OK:
574                         break;
575                 default:
576                         return 1;
577                 }
578         }
579         return 0;
580 }
581
582 int transport_refs_pushed(struct ref *ref)
583 {
584         for (; ref; ref = ref->next) {
585                 switch(ref->status) {
586                 case REF_STATUS_NONE:
587                 case REF_STATUS_UPTODATE:
588                         break;
589                 default:
590                         return 1;
591                 }
592         }
593         return 0;
594 }
595
596 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
597 {
598         struct refspec rs;
599
600         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
601                 return;
602
603         rs.src = ref->name;
604         rs.dst = NULL;
605
606         if (!remote_find_tracking(remote, &rs)) {
607                 if (verbose)
608                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
609                 if (ref->deletion) {
610                         delete_ref(rs.dst, NULL, 0);
611                 } else
612                         update_ref("update by push", rs.dst,
613                                         ref->new_sha1, NULL, 0, 0);
614                 free(rs.dst);
615         }
616 }
617
618 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
619 {
620         if (porcelain) {
621                 if (from)
622                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
623                 else
624                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
625                 if (msg)
626                         fprintf(stdout, "%s (%s)\n", summary, msg);
627                 else
628                         fprintf(stdout, "%s\n", summary);
629         } else {
630                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
631                 if (from)
632                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
633                 else
634                         fputs(prettify_refname(to->name), stderr);
635                 if (msg) {
636                         fputs(" (", stderr);
637                         fputs(msg, stderr);
638                         fputc(')', stderr);
639                 }
640                 fputc('\n', stderr);
641         }
642 }
643
644 static const char *status_abbrev(unsigned char sha1[20])
645 {
646         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
647 }
648
649 static void print_ok_ref_status(struct ref *ref, int porcelain)
650 {
651         if (ref->deletion)
652                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
653         else if (is_null_sha1(ref->old_sha1))
654                 print_ref_status('*',
655                         (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
656                         "[new branch]"),
657                         ref, ref->peer_ref, NULL, porcelain);
658         else {
659                 char quickref[84];
660                 char type;
661                 const char *msg;
662
663                 strcpy(quickref, status_abbrev(ref->old_sha1));
664                 if (ref->forced_update) {
665                         strcat(quickref, "...");
666                         type = '+';
667                         msg = "forced update";
668                 } else {
669                         strcat(quickref, "..");
670                         type = ' ';
671                         msg = NULL;
672                 }
673                 strcat(quickref, status_abbrev(ref->new_sha1));
674
675                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
676         }
677 }
678
679 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
680 {
681         if (!count)
682                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
683
684         switch(ref->status) {
685         case REF_STATUS_NONE:
686                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
687                 break;
688         case REF_STATUS_REJECT_NODELETE:
689                 print_ref_status('!', "[rejected]", ref, NULL,
690                                                  "remote does not support deleting refs", porcelain);
691                 break;
692         case REF_STATUS_UPTODATE:
693                 print_ref_status('=', "[up to date]", ref,
694                                                  ref->peer_ref, NULL, porcelain);
695                 break;
696         case REF_STATUS_REJECT_NONFASTFORWARD:
697                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
698                                                  "non-fast-forward", porcelain);
699                 break;
700         case REF_STATUS_REJECT_ALREADY_EXISTS:
701                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
702                                                  "already exists", porcelain);
703                 break;
704         case REF_STATUS_REJECT_FETCH_FIRST:
705                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
706                                                  "fetch first", porcelain);
707                 break;
708         case REF_STATUS_REJECT_NEEDS_FORCE:
709                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
710                                                  "needs force", porcelain);
711                 break;
712         case REF_STATUS_REJECT_STALE:
713                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
714                                                  "stale info", porcelain);
715                 break;
716         case REF_STATUS_REJECT_SHALLOW:
717                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
718                                                  "new shallow roots not allowed", porcelain);
719                 break;
720         case REF_STATUS_REMOTE_REJECT:
721                 print_ref_status('!', "[remote rejected]", ref,
722                                                  ref->deletion ? NULL : ref->peer_ref,
723                                                  ref->remote_status, porcelain);
724                 break;
725         case REF_STATUS_EXPECTING_REPORT:
726                 print_ref_status('!', "[remote failure]", ref,
727                                                  ref->deletion ? NULL : ref->peer_ref,
728                                                  "remote failed to report status", porcelain);
729                 break;
730         case REF_STATUS_OK:
731                 print_ok_ref_status(ref, porcelain);
732                 break;
733         }
734
735         return 1;
736 }
737
738 void transport_print_push_status(const char *dest, struct ref *refs,
739                                   int verbose, int porcelain, unsigned int *reject_reasons)
740 {
741         struct ref *ref;
742         int n = 0;
743         unsigned char head_sha1[20];
744         char *head;
745
746         head = resolve_refdup("HEAD", head_sha1, 1, NULL);
747
748         if (verbose) {
749                 for (ref = refs; ref; ref = ref->next)
750                         if (ref->status == REF_STATUS_UPTODATE)
751                                 n += print_one_push_status(ref, dest, n, porcelain);
752         }
753
754         for (ref = refs; ref; ref = ref->next)
755                 if (ref->status == REF_STATUS_OK)
756                         n += print_one_push_status(ref, dest, n, porcelain);
757
758         *reject_reasons = 0;
759         for (ref = refs; ref; ref = ref->next) {
760                 if (ref->status != REF_STATUS_NONE &&
761                     ref->status != REF_STATUS_UPTODATE &&
762                     ref->status != REF_STATUS_OK)
763                         n += print_one_push_status(ref, dest, n, porcelain);
764                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
765                         if (head != NULL && !strcmp(head, ref->name))
766                                 *reject_reasons |= REJECT_NON_FF_HEAD;
767                         else
768                                 *reject_reasons |= REJECT_NON_FF_OTHER;
769                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
770                         *reject_reasons |= REJECT_ALREADY_EXISTS;
771                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
772                         *reject_reasons |= REJECT_FETCH_FIRST;
773                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
774                         *reject_reasons |= REJECT_NEEDS_FORCE;
775                 }
776         }
777 }
778
779 void transport_verify_remote_names(int nr_heads, const char **heads)
780 {
781         int i;
782
783         for (i = 0; i < nr_heads; i++) {
784                 const char *local = heads[i];
785                 const char *remote = strrchr(heads[i], ':');
786
787                 if (*local == '+')
788                         local++;
789
790                 /* A matching refspec is okay.  */
791                 if (remote == local && remote[1] == '\0')
792                         continue;
793
794                 remote = remote ? (remote + 1) : local;
795                 if (check_refname_format(remote,
796                                 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
797                         die("remote part of refspec is not a valid name in %s",
798                                 heads[i]);
799         }
800 }
801
802 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
803 {
804         struct git_transport_data *data = transport->data;
805         struct send_pack_args args;
806         int ret;
807
808         if (!data->got_remote_heads) {
809                 struct ref *tmp_refs;
810                 connect_setup(transport, 1, 0);
811
812                 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
813                                  NULL, &data->shallow);
814                 data->got_remote_heads = 1;
815         }
816
817         memset(&args, 0, sizeof(args));
818         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
819         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
820         args.use_thin_pack = data->options.thin;
821         args.verbose = (transport->verbose > 0);
822         args.quiet = (transport->verbose < 0);
823         args.progress = transport->progress;
824         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
825         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
826
827         ret = send_pack(&args, data->fd, data->conn, remote_refs,
828                         &data->extra_have);
829
830         close(data->fd[1]);
831         close(data->fd[0]);
832         ret |= finish_connect(data->conn);
833         data->conn = NULL;
834         data->got_remote_heads = 0;
835
836         return ret;
837 }
838
839 static int connect_git(struct transport *transport, const char *name,
840                        const char *executable, int fd[2])
841 {
842         struct git_transport_data *data = transport->data;
843         data->conn = git_connect(data->fd, transport->url,
844                                  executable, 0);
845         fd[0] = data->fd[0];
846         fd[1] = data->fd[1];
847         return 0;
848 }
849
850 static int disconnect_git(struct transport *transport)
851 {
852         struct git_transport_data *data = transport->data;
853         if (data->conn) {
854                 if (data->got_remote_heads)
855                         packet_flush(data->fd[1]);
856                 close(data->fd[0]);
857                 close(data->fd[1]);
858                 finish_connect(data->conn);
859         }
860
861         free(data);
862         return 0;
863 }
864
865 void transport_take_over(struct transport *transport,
866                          struct child_process *child)
867 {
868         struct git_transport_data *data;
869
870         if (!transport->smart_options)
871                 die("Bug detected: Taking over transport requires non-NULL "
872                     "smart_options field.");
873
874         data = xcalloc(1, sizeof(*data));
875         data->options = *transport->smart_options;
876         data->conn = child;
877         data->fd[0] = data->conn->out;
878         data->fd[1] = data->conn->in;
879         data->got_remote_heads = 0;
880         transport->data = data;
881
882         transport->set_option = NULL;
883         transport->get_refs_list = get_refs_via_connect;
884         transport->fetch = fetch_refs_via_pack;
885         transport->push = NULL;
886         transport->push_refs = git_transport_push;
887         transport->disconnect = disconnect_git;
888         transport->smart_options = &(data->options);
889
890         transport->cannot_reuse = 1;
891 }
892
893 static int is_file(const char *url)
894 {
895         struct stat buf;
896         if (stat(url, &buf))
897                 return 0;
898         return S_ISREG(buf.st_mode);
899 }
900
901 static int external_specification_len(const char *url)
902 {
903         return strchr(url, ':') - url;
904 }
905
906 struct transport *transport_get(struct remote *remote, const char *url)
907 {
908         const char *helper;
909         struct transport *ret = xcalloc(1, sizeof(*ret));
910
911         ret->progress = isatty(2);
912
913         if (!remote)
914                 die("No remote provided to transport_get()");
915
916         ret->got_remote_refs = 0;
917         ret->remote = remote;
918         helper = remote->foreign_vcs;
919
920         if (!url && remote->url)
921                 url = remote->url[0];
922         ret->url = url;
923
924         /* maybe it is a foreign URL? */
925         if (url) {
926                 const char *p = url;
927
928                 while (is_urlschemechar(p == url, *p))
929                         p++;
930                 if (starts_with(p, "::"))
931                         helper = xstrndup(url, p - url);
932         }
933
934         if (helper) {
935                 transport_helper_init(ret, helper);
936         } else if (starts_with(url, "rsync:")) {
937                 ret->get_refs_list = get_refs_via_rsync;
938                 ret->fetch = fetch_objs_via_rsync;
939                 ret->push = rsync_transport_push;
940                 ret->smart_options = NULL;
941         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
942                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
943                 ret->data = data;
944                 ret->get_refs_list = get_refs_from_bundle;
945                 ret->fetch = fetch_refs_from_bundle;
946                 ret->disconnect = close_bundle;
947                 ret->smart_options = NULL;
948         } else if (!is_url(url)
949                 || starts_with(url, "file://")
950                 || starts_with(url, "git://")
951                 || starts_with(url, "ssh://")
952                 || starts_with(url, "git+ssh://")
953                 || starts_with(url, "ssh+git://")) {
954                 /* These are builtin smart transports. */
955                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
956                 ret->data = data;
957                 ret->set_option = NULL;
958                 ret->get_refs_list = get_refs_via_connect;
959                 ret->fetch = fetch_refs_via_pack;
960                 ret->push_refs = git_transport_push;
961                 ret->connect = connect_git;
962                 ret->disconnect = disconnect_git;
963                 ret->smart_options = &(data->options);
964
965                 data->conn = NULL;
966                 data->got_remote_heads = 0;
967         } else {
968                 /* Unknown protocol in URL. Pass to external handler. */
969                 int len = external_specification_len(url);
970                 char *handler = xmalloc(len + 1);
971                 handler[len] = 0;
972                 strncpy(handler, url, len);
973                 transport_helper_init(ret, handler);
974         }
975
976         if (ret->smart_options) {
977                 ret->smart_options->thin = 1;
978                 ret->smart_options->uploadpack = "git-upload-pack";
979                 if (remote->uploadpack)
980                         ret->smart_options->uploadpack = remote->uploadpack;
981                 ret->smart_options->receivepack = "git-receive-pack";
982                 if (remote->receivepack)
983                         ret->smart_options->receivepack = remote->receivepack;
984         }
985
986         return ret;
987 }
988
989 int transport_set_option(struct transport *transport,
990                          const char *name, const char *value)
991 {
992         int git_reports = 1, protocol_reports = 1;
993
994         if (transport->smart_options)
995                 git_reports = set_git_option(transport->smart_options,
996                                              name, value);
997
998         if (transport->set_option)
999                 protocol_reports = transport->set_option(transport, name,
1000                                                         value);
1001
1002         /* If either report is 0, report 0 (success). */
1003         if (!git_reports || !protocol_reports)
1004                 return 0;
1005         /* If either reports -1 (invalid value), report -1. */
1006         if ((git_reports == -1) || (protocol_reports == -1))
1007                 return -1;
1008         /* Otherwise if both report unknown, report unknown. */
1009         return 1;
1010 }
1011
1012 void transport_set_verbosity(struct transport *transport, int verbosity,
1013         int force_progress)
1014 {
1015         if (verbosity >= 1)
1016                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1017         if (verbosity < 0)
1018                 transport->verbose = -1;
1019
1020         /**
1021          * Rules used to determine whether to report progress (processing aborts
1022          * when a rule is satisfied):
1023          *
1024          *   . Report progress, if force_progress is 1 (ie. --progress).
1025          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1026          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1027          *   . Report progress if isatty(2) is 1.
1028          **/
1029         if (force_progress >= 0)
1030                 transport->progress = !!force_progress;
1031         else
1032                 transport->progress = verbosity >= 0 && isatty(2);
1033 }
1034
1035 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1036 {
1037         int i;
1038
1039         fprintf(stderr, "The following submodule paths contain changes that can\n"
1040                         "not be found on any remote:\n");
1041         for (i = 0; i < needs_pushing->nr; i++)
1042                 printf("  %s\n", needs_pushing->items[i].string);
1043         fprintf(stderr, "\nPlease try\n\n"
1044                         "       git push --recurse-submodules=on-demand\n\n"
1045                         "or cd to the path and use\n\n"
1046                         "       git push\n\n"
1047                         "to push them to a remote.\n\n");
1048
1049         string_list_clear(needs_pushing, 0);
1050
1051         die("Aborting.");
1052 }
1053
1054 static int run_pre_push_hook(struct transport *transport,
1055                              struct ref *remote_refs)
1056 {
1057         int ret = 0, x;
1058         struct ref *r;
1059         struct child_process proc;
1060         struct strbuf buf;
1061         const char *argv[4];
1062
1063         if (!(argv[0] = find_hook("pre-push")))
1064                 return 0;
1065
1066         argv[1] = transport->remote->name;
1067         argv[2] = transport->url;
1068         argv[3] = NULL;
1069
1070         memset(&proc, 0, sizeof(proc));
1071         proc.argv = argv;
1072         proc.in = -1;
1073
1074         if (start_command(&proc)) {
1075                 finish_command(&proc);
1076                 return -1;
1077         }
1078
1079         strbuf_init(&buf, 256);
1080
1081         for (r = remote_refs; r; r = r->next) {
1082                 if (!r->peer_ref) continue;
1083                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1084                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1085                 if (r->status == REF_STATUS_UPTODATE) continue;
1086
1087                 strbuf_reset(&buf);
1088                 strbuf_addf( &buf, "%s %s %s %s\n",
1089                          r->peer_ref->name, sha1_to_hex(r->new_sha1),
1090                          r->name, sha1_to_hex(r->old_sha1));
1091
1092                 if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1093                         ret = -1;
1094                         break;
1095                 }
1096         }
1097
1098         strbuf_release(&buf);
1099
1100         x = close(proc.in);
1101         if (!ret)
1102                 ret = x;
1103
1104         x = finish_command(&proc);
1105         if (!ret)
1106                 ret = x;
1107
1108         return ret;
1109 }
1110
1111 int transport_push(struct transport *transport,
1112                    int refspec_nr, const char **refspec, int flags,
1113                    unsigned int *reject_reasons)
1114 {
1115         *reject_reasons = 0;
1116         transport_verify_remote_names(refspec_nr, refspec);
1117
1118         if (transport->push) {
1119                 /* Maybe FIXME. But no important transport uses this case. */
1120                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1121                         die("This transport does not support using --set-upstream");
1122
1123                 return transport->push(transport, refspec_nr, refspec, flags);
1124         } else if (transport->push_refs) {
1125                 struct ref *remote_refs;
1126                 struct ref *local_refs = get_local_heads();
1127                 int match_flags = MATCH_REFS_NONE;
1128                 int verbose = (transport->verbose > 0);
1129                 int quiet = (transport->verbose < 0);
1130                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1131                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1132                 int push_ret, ret, err;
1133
1134                 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1135                         return -1;
1136
1137                 remote_refs = transport->get_refs_list(transport, 1);
1138
1139                 if (flags & TRANSPORT_PUSH_ALL)
1140                         match_flags |= MATCH_REFS_ALL;
1141                 if (flags & TRANSPORT_PUSH_MIRROR)
1142                         match_flags |= MATCH_REFS_MIRROR;
1143                 if (flags & TRANSPORT_PUSH_PRUNE)
1144                         match_flags |= MATCH_REFS_PRUNE;
1145                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1146                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1147
1148                 if (match_push_refs(local_refs, &remote_refs,
1149                                     refspec_nr, refspec, match_flags)) {
1150                         return -1;
1151                 }
1152
1153                 if (transport->smart_options &&
1154                     transport->smart_options->cas &&
1155                     !is_empty_cas(transport->smart_options->cas))
1156                         apply_push_cas(transport->smart_options->cas,
1157                                        transport->remote, remote_refs);
1158
1159                 set_ref_status_for_push(remote_refs,
1160                         flags & TRANSPORT_PUSH_MIRROR,
1161                         flags & TRANSPORT_PUSH_FORCE);
1162
1163                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1164                         if (run_pre_push_hook(transport, remote_refs))
1165                                 return -1;
1166
1167                 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1168                         struct ref *ref = remote_refs;
1169                         for (; ref; ref = ref->next)
1170                                 if (!is_null_sha1(ref->new_sha1) &&
1171                                     !push_unpushed_submodules(ref->new_sha1,
1172                                             transport->remote->name))
1173                                     die ("Failed to push all needed submodules!");
1174                 }
1175
1176                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1177                               TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1178                         struct ref *ref = remote_refs;
1179                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1180
1181                         for (; ref; ref = ref->next)
1182                                 if (!is_null_sha1(ref->new_sha1) &&
1183                                     find_unpushed_submodules(ref->new_sha1,
1184                                             transport->remote->name, &needs_pushing))
1185                                         die_with_unpushed_submodules(&needs_pushing);
1186                 }
1187
1188                 push_ret = transport->push_refs(transport, remote_refs, flags);
1189                 err = push_had_errors(remote_refs);
1190                 ret = push_ret | err;
1191
1192                 if (!quiet || err)
1193                         transport_print_push_status(transport->url, remote_refs,
1194                                         verbose | porcelain, porcelain,
1195                                         reject_reasons);
1196
1197                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1198                         set_upstreams(transport, remote_refs, pretend);
1199
1200                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1201                         struct ref *ref;
1202                         for (ref = remote_refs; ref; ref = ref->next)
1203                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1204                 }
1205
1206                 if (porcelain && !push_ret)
1207                         puts("Done");
1208                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1209                         fprintf(stderr, "Everything up-to-date\n");
1210
1211                 return ret;
1212         }
1213         return 1;
1214 }
1215
1216 const struct ref *transport_get_remote_refs(struct transport *transport)
1217 {
1218         if (!transport->got_remote_refs) {
1219                 transport->remote_refs = transport->get_refs_list(transport, 0);
1220                 transport->got_remote_refs = 1;
1221         }
1222
1223         return transport->remote_refs;
1224 }
1225
1226 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1227 {
1228         int rc;
1229         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1230         struct ref **heads = NULL;
1231         struct ref *rm;
1232
1233         for (rm = refs; rm; rm = rm->next) {
1234                 nr_refs++;
1235                 if (rm->peer_ref &&
1236                     !is_null_sha1(rm->old_sha1) &&
1237                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1238                         continue;
1239                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1240                 heads[nr_heads++] = rm;
1241         }
1242
1243         if (!nr_heads) {
1244                 /*
1245                  * When deepening of a shallow repository is requested,
1246                  * then local and remote refs are likely to still be equal.
1247                  * Just feed them all to the fetch method in that case.
1248                  * This condition shouldn't be met in a non-deepening fetch
1249                  * (see builtin/fetch.c:quickfetch()).
1250                  */
1251                 heads = xmalloc(nr_refs * sizeof(*heads));
1252                 for (rm = refs; rm; rm = rm->next)
1253                         heads[nr_heads++] = rm;
1254         }
1255
1256         rc = transport->fetch(transport, nr_heads, heads);
1257
1258         free(heads);
1259         return rc;
1260 }
1261
1262 void transport_unlock_pack(struct transport *transport)
1263 {
1264         if (transport->pack_lockfile) {
1265                 unlink_or_warn(transport->pack_lockfile);
1266                 free(transport->pack_lockfile);
1267                 transport->pack_lockfile = NULL;
1268         }
1269 }
1270
1271 int transport_connect(struct transport *transport, const char *name,
1272                       const char *exec, int fd[2])
1273 {
1274         if (transport->connect)
1275                 return transport->connect(transport, name, exec, fd);
1276         else
1277                 die("Operation not supported by protocol");
1278 }
1279
1280 int transport_disconnect(struct transport *transport)
1281 {
1282         int ret = 0;
1283         if (transport->disconnect)
1284                 ret = transport->disconnect(transport);
1285         free(transport);
1286         return ret;
1287 }
1288
1289 /*
1290  * Strip username (and password) from a URL and return
1291  * it in a newly allocated string.
1292  */
1293 char *transport_anonymize_url(const char *url)
1294 {
1295         char *anon_url, *scheme_prefix, *anon_part;
1296         size_t anon_len, prefix_len = 0;
1297
1298         anon_part = strchr(url, '@');
1299         if (url_is_local_not_ssh(url) || !anon_part)
1300                 goto literal_copy;
1301
1302         anon_len = strlen(++anon_part);
1303         scheme_prefix = strstr(url, "://");
1304         if (!scheme_prefix) {
1305                 if (!strchr(anon_part, ':'))
1306                         /* cannot be "me@there:/path/name" */
1307                         goto literal_copy;
1308         } else {
1309                 const char *cp;
1310                 /* make sure scheme is reasonable */
1311                 for (cp = url; cp < scheme_prefix; cp++) {
1312                         switch (*cp) {
1313                                 /* RFC 1738 2.1 */
1314                         case '+': case '.': case '-':
1315                                 break; /* ok */
1316                         default:
1317                                 if (isalnum(*cp))
1318                                         break;
1319                                 /* it isn't */
1320                                 goto literal_copy;
1321                         }
1322                 }
1323                 /* @ past the first slash does not count */
1324                 cp = strchr(scheme_prefix + 3, '/');
1325                 if (cp && cp < anon_part)
1326                         goto literal_copy;
1327                 prefix_len = scheme_prefix - url + 3;
1328         }
1329         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1330         memcpy(anon_url, url, prefix_len);
1331         memcpy(anon_url + prefix_len, anon_part, anon_len);
1332         return anon_url;
1333 literal_copy:
1334         return xstrdup(url);
1335 }
1336
1337 struct alternate_refs_data {
1338         alternate_ref_fn *fn;
1339         void *data;
1340 };
1341
1342 static int refs_from_alternate_cb(struct alternate_object_database *e,
1343                                   void *data)
1344 {
1345         char *other;
1346         size_t len;
1347         struct remote *remote;
1348         struct transport *transport;
1349         const struct ref *extra;
1350         struct alternate_refs_data *cb = data;
1351
1352         e->name[-1] = '\0';
1353         other = xstrdup(real_path(e->base));
1354         e->name[-1] = '/';
1355         len = strlen(other);
1356
1357         while (other[len-1] == '/')
1358                 other[--len] = '\0';
1359         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1360                 return 0;
1361         /* Is this a git repository with refs? */
1362         memcpy(other + len - 8, "/refs", 6);
1363         if (!is_directory(other))
1364                 return 0;
1365         other[len - 8] = '\0';
1366         remote = remote_get(other);
1367         transport = transport_get(remote, other);
1368         for (extra = transport_get_remote_refs(transport);
1369              extra;
1370              extra = extra->next)
1371                 cb->fn(extra, cb->data);
1372         transport_disconnect(transport);
1373         free(other);
1374         return 0;
1375 }
1376
1377 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1378 {
1379         struct alternate_refs_data cb;
1380         cb.fn = fn;
1381         cb.data = data;
1382         foreach_alt_odb(refs_from_alternate_cb, &cb);
1383 }