Merge branch 'maint'
[git] / builtin-remote.c
1 #include "cache.h"
2 #include "parse-options.h"
3 #include "transport.h"
4 #include "remote.h"
5 #include "string-list.h"
6 #include "strbuf.h"
7 #include "run-command.h"
8 #include "refs.h"
9
10 static const char * const builtin_remote_usage[] = {
11         "git remote [-v | --verbose]",
12         "git remote add [-t <branch>] [-m <master>] [-f] [--mirror] <name> <url>",
13         "git remote rename <old> <new>",
14         "git remote rm <name>",
15         "git remote set-head <name> [-a | -d | <branch>]",
16         "git remote show [-n] <name>",
17         "git remote prune [-n | --dry-run] <name>",
18         "git remote [-v | --verbose] update [group]",
19         NULL
20 };
21
22 #define GET_REF_STATES (1<<0)
23 #define GET_HEAD_NAMES (1<<1)
24 #define GET_PUSH_REF_STATES (1<<2)
25
26 static int verbose;
27
28 static int show_all(void);
29
30 static inline int postfixcmp(const char *string, const char *postfix)
31 {
32         int len1 = strlen(string), len2 = strlen(postfix);
33         if (len1 < len2)
34                 return 1;
35         return strcmp(string + len1 - len2, postfix);
36 }
37
38 static int opt_parse_track(const struct option *opt, const char *arg, int not)
39 {
40         struct string_list *list = opt->value;
41         if (not)
42                 string_list_clear(list, 0);
43         else
44                 string_list_append(arg, list);
45         return 0;
46 }
47
48 static int fetch_remote(const char *name)
49 {
50         const char *argv[] = { "fetch", name, NULL, NULL };
51         if (verbose) {
52                 argv[1] = "-v";
53                 argv[2] = name;
54         }
55         printf("Updating %s\n", name);
56         if (run_command_v_opt(argv, RUN_GIT_CMD))
57                 return error("Could not fetch %s", name);
58         return 0;
59 }
60
61 static int add(int argc, const char **argv)
62 {
63         int fetch = 0, mirror = 0;
64         struct string_list track = { NULL, 0, 0 };
65         const char *master = NULL;
66         struct remote *remote;
67         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
68         const char *name, *url;
69         int i;
70
71         struct option options[] = {
72                 OPT_GROUP("add specific options"),
73                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
74                 OPT_CALLBACK('t', "track", &track, "branch",
75                         "branch(es) to track", opt_parse_track),
76                 OPT_STRING('m', "master", &master, "branch", "master branch"),
77                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
78                 OPT_END()
79         };
80
81         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
82
83         if (argc < 2)
84                 usage_with_options(builtin_remote_usage, options);
85
86         name = argv[0];
87         url = argv[1];
88
89         remote = remote_get(name);
90         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
91                         remote->fetch_refspec_nr))
92                 die("remote %s already exists.", name);
93
94         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
95         if (!valid_fetch_refspec(buf2.buf))
96                 die("'%s' is not a valid remote name", name);
97
98         strbuf_addf(&buf, "remote.%s.url", name);
99         if (git_config_set(buf.buf, url))
100                 return 1;
101
102         strbuf_reset(&buf);
103         strbuf_addf(&buf, "remote.%s.fetch", name);
104
105         if (track.nr == 0)
106                 string_list_append("*", &track);
107         for (i = 0; i < track.nr; i++) {
108                 struct string_list_item *item = track.items + i;
109
110                 strbuf_reset(&buf2);
111                 strbuf_addch(&buf2, '+');
112                 if (mirror)
113                         strbuf_addf(&buf2, "refs/%s:refs/%s",
114                                         item->string, item->string);
115                 else
116                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
117                                         item->string, name, item->string);
118                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
119                         return 1;
120         }
121
122         if (mirror) {
123                 strbuf_reset(&buf);
124                 strbuf_addf(&buf, "remote.%s.mirror", name);
125                 if (git_config_set(buf.buf, "true"))
126                         return 1;
127         }
128
129         if (fetch && fetch_remote(name))
130                 return 1;
131
132         if (master) {
133                 strbuf_reset(&buf);
134                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
135
136                 strbuf_reset(&buf2);
137                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
138
139                 if (create_symref(buf.buf, buf2.buf, "remote add"))
140                         return error("Could not setup master '%s'", master);
141         }
142
143         strbuf_release(&buf);
144         strbuf_release(&buf2);
145         string_list_clear(&track, 0);
146
147         return 0;
148 }
149
150 struct branch_info {
151         char *remote_name;
152         struct string_list merge;
153         int rebase;
154 };
155
156 static struct string_list branch_list;
157
158 static const char *abbrev_ref(const char *name, const char *prefix)
159 {
160         const char *abbrev = skip_prefix(name, prefix);
161         if (abbrev)
162                 return abbrev;
163         return name;
164 }
165 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
166
167 static int config_read_branches(const char *key, const char *value, void *cb)
168 {
169         if (!prefixcmp(key, "branch.")) {
170                 const char *orig_key = key;
171                 char *name;
172                 struct string_list_item *item;
173                 struct branch_info *info;
174                 enum { REMOTE, MERGE, REBASE } type;
175
176                 key += 7;
177                 if (!postfixcmp(key, ".remote")) {
178                         name = xstrndup(key, strlen(key) - 7);
179                         type = REMOTE;
180                 } else if (!postfixcmp(key, ".merge")) {
181                         name = xstrndup(key, strlen(key) - 6);
182                         type = MERGE;
183                 } else if (!postfixcmp(key, ".rebase")) {
184                         name = xstrndup(key, strlen(key) - 7);
185                         type = REBASE;
186                 } else
187                         return 0;
188
189                 item = string_list_insert(name, &branch_list);
190
191                 if (!item->util)
192                         item->util = xcalloc(sizeof(struct branch_info), 1);
193                 info = item->util;
194                 if (type == REMOTE) {
195                         if (info->remote_name)
196                                 warning("more than one %s", orig_key);
197                         info->remote_name = xstrdup(value);
198                 } else if (type == MERGE) {
199                         char *space = strchr(value, ' ');
200                         value = abbrev_branch(value);
201                         while (space) {
202                                 char *merge;
203                                 merge = xstrndup(value, space - value);
204                                 string_list_append(merge, &info->merge);
205                                 value = abbrev_branch(space + 1);
206                                 space = strchr(value, ' ');
207                         }
208                         string_list_append(xstrdup(value), &info->merge);
209                 } else
210                         info->rebase = git_config_bool(orig_key, value);
211         }
212         return 0;
213 }
214
215 static void read_branches(void)
216 {
217         if (branch_list.nr)
218                 return;
219         git_config(config_read_branches, NULL);
220 }
221
222 struct ref_states {
223         struct remote *remote;
224         struct string_list new, stale, tracked, heads, push;
225         int queried;
226 };
227
228 static int handle_one_branch(const char *refname,
229         const unsigned char *sha1, int flags, void *cb_data)
230 {
231         struct ref_states *states = cb_data;
232         struct refspec refspec;
233
234         memset(&refspec, 0, sizeof(refspec));
235         refspec.dst = (char *)refname;
236         if (!remote_find_tracking(states->remote, &refspec)) {
237                 struct string_list_item *item;
238                 const char *name = abbrev_branch(refspec.src);
239                 /* symbolic refs pointing nowhere were handled already */
240                 if ((flags & REF_ISSYMREF) ||
241                     string_list_has_string(&states->tracked, name) ||
242                     string_list_has_string(&states->new, name))
243                         return 0;
244                 item = string_list_append(name, &states->stale);
245                 item->util = xstrdup(refname);
246         }
247         return 0;
248 }
249
250 static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
251 {
252         struct ref *fetch_map = NULL, **tail = &fetch_map;
253         struct ref *ref;
254         int i;
255
256         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
257                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
258                         die("Could not get fetch map for refspec %s",
259                                 states->remote->fetch_refspec[i]);
260
261         states->new.strdup_strings = states->tracked.strdup_strings = 1;
262         for (ref = fetch_map; ref; ref = ref->next) {
263                 unsigned char sha1[20];
264                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
265                         string_list_append(abbrev_branch(ref->name), &states->new);
266                 else
267                         string_list_append(abbrev_branch(ref->name), &states->tracked);
268         }
269         free_refs(fetch_map);
270
271         sort_string_list(&states->new);
272         sort_string_list(&states->tracked);
273         for_each_ref(handle_one_branch, states);
274         sort_string_list(&states->stale);
275
276         return 0;
277 }
278
279 struct push_info {
280         char *dest;
281         int forced;
282         enum {
283                 PUSH_STATUS_CREATE = 0,
284                 PUSH_STATUS_DELETE,
285                 PUSH_STATUS_UPTODATE,
286                 PUSH_STATUS_FASTFORWARD,
287                 PUSH_STATUS_OUTOFDATE,
288                 PUSH_STATUS_NOTQUERIED,
289         } status;
290 };
291
292 static int get_push_ref_states(const struct ref *remote_refs,
293         struct ref_states *states)
294 {
295         struct remote *remote = states->remote;
296         struct ref *ref, *local_refs, *push_map, **push_tail;
297         if (remote->mirror)
298                 return 0;
299
300         local_refs = get_local_heads();
301         ref = push_map = copy_ref_list(remote_refs);
302         while (ref->next)
303                 ref = ref->next;
304         push_tail = &ref->next;
305
306         match_refs(local_refs, push_map, &push_tail, remote->push_refspec_nr,
307                    remote->push_refspec, MATCH_REFS_NONE);
308
309         states->push.strdup_strings = 1;
310         for (ref = push_map; ref; ref = ref->next) {
311                 struct string_list_item *item;
312                 struct push_info *info;
313
314                 if (!ref->peer_ref)
315                         continue;
316                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
317
318                 item = string_list_append(abbrev_branch(ref->peer_ref->name),
319                                           &states->push);
320                 item->util = xcalloc(sizeof(struct push_info), 1);
321                 info = item->util;
322                 info->forced = ref->force;
323                 info->dest = xstrdup(abbrev_branch(ref->name));
324
325                 if (is_null_sha1(ref->new_sha1)) {
326                         info->status = PUSH_STATUS_DELETE;
327                 } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
328                         info->status = PUSH_STATUS_UPTODATE;
329                 else if (is_null_sha1(ref->old_sha1))
330                         info->status = PUSH_STATUS_CREATE;
331                 else if (has_sha1_file(ref->old_sha1) &&
332                          ref_newer(ref->new_sha1, ref->old_sha1))
333                         info->status = PUSH_STATUS_FASTFORWARD;
334                 else
335                         info->status = PUSH_STATUS_OUTOFDATE;
336         }
337         free_refs(local_refs);
338         free_refs(push_map);
339         return 0;
340 }
341
342 static int get_push_ref_states_noquery(struct ref_states *states)
343 {
344         int i;
345         struct remote *remote = states->remote;
346         struct string_list_item *item;
347         struct push_info *info;
348
349         if (remote->mirror)
350                 return 0;
351
352         states->push.strdup_strings = 1;
353         if (!remote->push_refspec_nr) {
354                 item = string_list_append("(matching)", &states->push);
355                 info = item->util = xcalloc(sizeof(struct push_info), 1);
356                 info->status = PUSH_STATUS_NOTQUERIED;
357                 info->dest = xstrdup(item->string);
358         }
359         for (i = 0; i < remote->push_refspec_nr; i++) {
360                 struct refspec *spec = remote->push + i;
361                 if (spec->matching)
362                         item = string_list_append("(matching)", &states->push);
363                 else if (strlen(spec->src))
364                         item = string_list_append(spec->src, &states->push);
365                 else
366                         item = string_list_append("(delete)", &states->push);
367
368                 info = item->util = xcalloc(sizeof(struct push_info), 1);
369                 info->forced = spec->force;
370                 info->status = PUSH_STATUS_NOTQUERIED;
371                 info->dest = xstrdup(spec->dst ? spec->dst : item->string);
372         }
373         return 0;
374 }
375
376 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
377 {
378         struct ref *ref, *matches;
379         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
380         struct refspec refspec;
381
382         refspec.force = 0;
383         refspec.pattern = 1;
384         refspec.src = refspec.dst = "refs/heads/*";
385         states->heads.strdup_strings = 1;
386         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
387         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
388                                     fetch_map, 1);
389         for(ref = matches; ref; ref = ref->next)
390                 string_list_append(abbrev_branch(ref->name), &states->heads);
391
392         free_refs(fetch_map);
393         free_refs(matches);
394
395         return 0;
396 }
397
398 struct known_remote {
399         struct known_remote *next;
400         struct remote *remote;
401 };
402
403 struct known_remotes {
404         struct remote *to_delete;
405         struct known_remote *list;
406 };
407
408 static int add_known_remote(struct remote *remote, void *cb_data)
409 {
410         struct known_remotes *all = cb_data;
411         struct known_remote *r;
412
413         if (!strcmp(all->to_delete->name, remote->name))
414                 return 0;
415
416         r = xmalloc(sizeof(*r));
417         r->remote = remote;
418         r->next = all->list;
419         all->list = r;
420         return 0;
421 }
422
423 struct branches_for_remote {
424         struct remote *remote;
425         struct string_list *branches, *skipped;
426         struct known_remotes *keep;
427 };
428
429 static int add_branch_for_removal(const char *refname,
430         const unsigned char *sha1, int flags, void *cb_data)
431 {
432         struct branches_for_remote *branches = cb_data;
433         struct refspec refspec;
434         struct string_list_item *item;
435         struct known_remote *kr;
436
437         memset(&refspec, 0, sizeof(refspec));
438         refspec.dst = (char *)refname;
439         if (remote_find_tracking(branches->remote, &refspec))
440                 return 0;
441
442         /* don't delete a branch if another remote also uses it */
443         for (kr = branches->keep->list; kr; kr = kr->next) {
444                 memset(&refspec, 0, sizeof(refspec));
445                 refspec.dst = (char *)refname;
446                 if (!remote_find_tracking(kr->remote, &refspec))
447                         return 0;
448         }
449
450         /* don't delete non-remote refs */
451         if (prefixcmp(refname, "refs/remotes")) {
452                 /* advise user how to delete local branches */
453                 if (!prefixcmp(refname, "refs/heads/"))
454                         string_list_append(abbrev_branch(refname),
455                                            branches->skipped);
456                 /* silently skip over other non-remote refs */
457                 return 0;
458         }
459
460         /* make sure that symrefs are deleted */
461         if (flags & REF_ISSYMREF)
462                 return unlink(git_path("%s", refname));
463
464         item = string_list_append(refname, branches->branches);
465         item->util = xmalloc(20);
466         hashcpy(item->util, sha1);
467
468         return 0;
469 }
470
471 struct rename_info {
472         const char *old;
473         const char *new;
474         struct string_list *remote_branches;
475 };
476
477 static int read_remote_branches(const char *refname,
478         const unsigned char *sha1, int flags, void *cb_data)
479 {
480         struct rename_info *rename = cb_data;
481         struct strbuf buf = STRBUF_INIT;
482         struct string_list_item *item;
483         int flag;
484         unsigned char orig_sha1[20];
485         const char *symref;
486
487         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
488         if(!prefixcmp(refname, buf.buf)) {
489                 item = string_list_append(xstrdup(refname), rename->remote_branches);
490                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
491                 if (flag & REF_ISSYMREF)
492                         item->util = xstrdup(symref);
493                 else
494                         item->util = NULL;
495         }
496
497         return 0;
498 }
499
500 static int migrate_file(struct remote *remote)
501 {
502         struct strbuf buf = STRBUF_INIT;
503         int i;
504         char *path = NULL;
505
506         strbuf_addf(&buf, "remote.%s.url", remote->name);
507         for (i = 0; i < remote->url_nr; i++)
508                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
509                         return error("Could not append '%s' to '%s'",
510                                         remote->url[i], buf.buf);
511         strbuf_reset(&buf);
512         strbuf_addf(&buf, "remote.%s.push", remote->name);
513         for (i = 0; i < remote->push_refspec_nr; i++)
514                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
515                         return error("Could not append '%s' to '%s'",
516                                         remote->push_refspec[i], buf.buf);
517         strbuf_reset(&buf);
518         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
519         for (i = 0; i < remote->fetch_refspec_nr; i++)
520                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
521                         return error("Could not append '%s' to '%s'",
522                                         remote->fetch_refspec[i], buf.buf);
523         if (remote->origin == REMOTE_REMOTES)
524                 path = git_path("remotes/%s", remote->name);
525         else if (remote->origin == REMOTE_BRANCHES)
526                 path = git_path("branches/%s", remote->name);
527         if (path && unlink(path))
528                 warning("failed to remove '%s'", path);
529         return 0;
530 }
531
532 static int mv(int argc, const char **argv)
533 {
534         struct option options[] = {
535                 OPT_END()
536         };
537         struct remote *oldremote, *newremote;
538         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
539         struct string_list remote_branches = { NULL, 0, 0, 0 };
540         struct rename_info rename;
541         int i;
542
543         if (argc != 3)
544                 usage_with_options(builtin_remote_usage, options);
545
546         rename.old = argv[1];
547         rename.new = argv[2];
548         rename.remote_branches = &remote_branches;
549
550         oldremote = remote_get(rename.old);
551         if (!oldremote)
552                 die("No such remote: %s", rename.old);
553
554         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
555                 return migrate_file(oldremote);
556
557         newremote = remote_get(rename.new);
558         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
559                 die("remote %s already exists.", rename.new);
560
561         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
562         if (!valid_fetch_refspec(buf.buf))
563                 die("'%s' is not a valid remote name", rename.new);
564
565         strbuf_reset(&buf);
566         strbuf_addf(&buf, "remote.%s", rename.old);
567         strbuf_addf(&buf2, "remote.%s", rename.new);
568         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
569                 return error("Could not rename config section '%s' to '%s'",
570                                 buf.buf, buf2.buf);
571
572         strbuf_reset(&buf);
573         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
574         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
575                 return error("Could not remove config section '%s'", buf.buf);
576         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
577                 char *ptr;
578
579                 strbuf_reset(&buf2);
580                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
581                 ptr = strstr(buf2.buf, rename.old);
582                 if (ptr)
583                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
584                                         rename.new, strlen(rename.new));
585                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
586                         return error("Could not append '%s'", buf.buf);
587         }
588
589         read_branches();
590         for (i = 0; i < branch_list.nr; i++) {
591                 struct string_list_item *item = branch_list.items + i;
592                 struct branch_info *info = item->util;
593                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
594                         strbuf_reset(&buf);
595                         strbuf_addf(&buf, "branch.%s.remote", item->string);
596                         if (git_config_set(buf.buf, rename.new)) {
597                                 return error("Could not set '%s'", buf.buf);
598                         }
599                 }
600         }
601
602         /*
603          * First remove symrefs, then rename the rest, finally create
604          * the new symrefs.
605          */
606         for_each_ref(read_remote_branches, &rename);
607         for (i = 0; i < remote_branches.nr; i++) {
608                 struct string_list_item *item = remote_branches.items + i;
609                 int flag = 0;
610                 unsigned char sha1[20];
611
612                 resolve_ref(item->string, sha1, 1, &flag);
613                 if (!(flag & REF_ISSYMREF))
614                         continue;
615                 if (delete_ref(item->string, NULL, REF_NODEREF))
616                         die("deleting '%s' failed", item->string);
617         }
618         for (i = 0; i < remote_branches.nr; i++) {
619                 struct string_list_item *item = remote_branches.items + i;
620
621                 if (item->util)
622                         continue;
623                 strbuf_reset(&buf);
624                 strbuf_addstr(&buf, item->string);
625                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
626                                 rename.new, strlen(rename.new));
627                 strbuf_reset(&buf2);
628                 strbuf_addf(&buf2, "remote: renamed %s to %s",
629                                 item->string, buf.buf);
630                 if (rename_ref(item->string, buf.buf, buf2.buf))
631                         die("renaming '%s' failed", item->string);
632         }
633         for (i = 0; i < remote_branches.nr; i++) {
634                 struct string_list_item *item = remote_branches.items + i;
635
636                 if (!item->util)
637                         continue;
638                 strbuf_reset(&buf);
639                 strbuf_addstr(&buf, item->string);
640                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
641                                 rename.new, strlen(rename.new));
642                 strbuf_reset(&buf2);
643                 strbuf_addstr(&buf2, item->util);
644                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
645                                 rename.new, strlen(rename.new));
646                 strbuf_reset(&buf3);
647                 strbuf_addf(&buf3, "remote: renamed %s to %s",
648                                 item->string, buf.buf);
649                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
650                         die("creating '%s' failed", buf.buf);
651         }
652         return 0;
653 }
654
655 static int remove_branches(struct string_list *branches)
656 {
657         int i, result = 0;
658         for (i = 0; i < branches->nr; i++) {
659                 struct string_list_item *item = branches->items + i;
660                 const char *refname = item->string;
661                 unsigned char *sha1 = item->util;
662
663                 if (delete_ref(refname, sha1, 0))
664                         result |= error("Could not remove branch %s", refname);
665         }
666         return result;
667 }
668
669 static int rm(int argc, const char **argv)
670 {
671         struct option options[] = {
672                 OPT_END()
673         };
674         struct remote *remote;
675         struct strbuf buf = STRBUF_INIT;
676         struct known_remotes known_remotes = { NULL, NULL };
677         struct string_list branches = { NULL, 0, 0, 1 };
678         struct string_list skipped = { NULL, 0, 0, 1 };
679         struct branches_for_remote cb_data = {
680                 NULL, &branches, &skipped, &known_remotes
681         };
682         int i, result;
683
684         if (argc != 2)
685                 usage_with_options(builtin_remote_usage, options);
686
687         remote = remote_get(argv[1]);
688         if (!remote)
689                 die("No such remote: %s", argv[1]);
690
691         known_remotes.to_delete = remote;
692         for_each_remote(add_known_remote, &known_remotes);
693
694         strbuf_addf(&buf, "remote.%s", remote->name);
695         if (git_config_rename_section(buf.buf, NULL) < 1)
696                 return error("Could not remove config section '%s'", buf.buf);
697
698         read_branches();
699         for (i = 0; i < branch_list.nr; i++) {
700                 struct string_list_item *item = branch_list.items + i;
701                 struct branch_info *info = item->util;
702                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
703                         const char *keys[] = { "remote", "merge", NULL }, **k;
704                         for (k = keys; *k; k++) {
705                                 strbuf_reset(&buf);
706                                 strbuf_addf(&buf, "branch.%s.%s",
707                                                 item->string, *k);
708                                 if (git_config_set(buf.buf, NULL)) {
709                                         strbuf_release(&buf);
710                                         return -1;
711                                 }
712                         }
713                 }
714         }
715
716         /*
717          * We cannot just pass a function to for_each_ref() which deletes
718          * the branches one by one, since for_each_ref() relies on cached
719          * refs, which are invalidated when deleting a branch.
720          */
721         cb_data.remote = remote;
722         result = for_each_ref(add_branch_for_removal, &cb_data);
723         strbuf_release(&buf);
724
725         if (!result)
726                 result = remove_branches(&branches);
727         string_list_clear(&branches, 1);
728
729         if (skipped.nr) {
730                 fprintf(stderr, skipped.nr == 1 ?
731                         "Note: A non-remote branch was not removed; "
732                         "to delete it, use:\n" :
733                         "Note: Non-remote branches were not removed; "
734                         "to delete them, use:\n");
735                 for (i = 0; i < skipped.nr; i++)
736                         fprintf(stderr, "  git branch -d %s\n",
737                                 skipped.items[i].string);
738         }
739         string_list_clear(&skipped, 0);
740
741         return result;
742 }
743
744 void clear_push_info(void *util, const char *string)
745 {
746         struct push_info *info = util;
747         free(info->dest);
748         free(info);
749 }
750
751 static void free_remote_ref_states(struct ref_states *states)
752 {
753         string_list_clear(&states->new, 0);
754         string_list_clear(&states->stale, 0);
755         string_list_clear(&states->tracked, 0);
756         string_list_clear(&states->heads, 0);
757         string_list_clear_func(&states->push, clear_push_info);
758 }
759
760 static int append_ref_to_tracked_list(const char *refname,
761         const unsigned char *sha1, int flags, void *cb_data)
762 {
763         struct ref_states *states = cb_data;
764         struct refspec refspec;
765
766         if (flags & REF_ISSYMREF)
767                 return 0;
768
769         memset(&refspec, 0, sizeof(refspec));
770         refspec.dst = (char *)refname;
771         if (!remote_find_tracking(states->remote, &refspec))
772                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
773
774         return 0;
775 }
776
777 static int get_remote_ref_states(const char *name,
778                                  struct ref_states *states,
779                                  int query)
780 {
781         struct transport *transport;
782         const struct ref *remote_refs;
783
784         states->remote = remote_get(name);
785         if (!states->remote)
786                 return error("No such remote: %s", name);
787
788         read_branches();
789
790         if (query) {
791                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
792                         states->remote->url[0] : NULL);
793                 remote_refs = transport_get_remote_refs(transport);
794                 transport_disconnect(transport);
795
796                 states->queried = 1;
797                 if (query & GET_REF_STATES)
798                         get_ref_states(remote_refs, states);
799                 if (query & GET_HEAD_NAMES)
800                         get_head_names(remote_refs, states);
801                 if (query & GET_PUSH_REF_STATES)
802                         get_push_ref_states(remote_refs, states);
803         } else {
804                 for_each_ref(append_ref_to_tracked_list, states);
805                 sort_string_list(&states->tracked);
806                 get_push_ref_states_noquery(states);
807         }
808
809         return 0;
810 }
811
812 struct show_info {
813         struct string_list *list;
814         struct ref_states *states;
815         int width, width2;
816         int any_rebase;
817 };
818
819 int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
820 {
821         struct show_info *info = cb_data;
822         int n = strlen(item->string);
823         if (n > info->width)
824                 info->width = n;
825         string_list_insert(item->string, info->list);
826         return 0;
827 }
828
829 int show_remote_info_item(struct string_list_item *item, void *cb_data)
830 {
831         struct show_info *info = cb_data;
832         struct ref_states *states = info->states;
833         const char *name = item->string;
834
835         if (states->queried) {
836                 const char *fmt = "%s";
837                 const char *arg = "";
838                 if (string_list_has_string(&states->new, name)) {
839                         fmt = " new (next fetch will store in remotes/%s)";
840                         arg = states->remote->name;
841                 } else if (string_list_has_string(&states->tracked, name))
842                         arg = " tracked";
843                 else if (string_list_has_string(&states->stale, name))
844                         arg = " stale (use 'git remote prune' to remove)";
845                 else
846                         arg = " ???";
847                 printf("    %-*s", info->width, name);
848                 printf(fmt, arg);
849                 printf("\n");
850         } else
851                 printf("    %s\n", name);
852
853         return 0;
854 }
855
856 int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
857 {
858         struct show_info *show_info = cb_data;
859         struct ref_states *states = show_info->states;
860         struct branch_info *branch_info = branch_item->util;
861         struct string_list_item *item;
862         int n;
863
864         if (!branch_info->merge.nr || !branch_info->remote_name ||
865             strcmp(states->remote->name, branch_info->remote_name))
866                 return 0;
867         if ((n = strlen(branch_item->string)) > show_info->width)
868                 show_info->width = n;
869         if (branch_info->rebase)
870                 show_info->any_rebase = 1;
871
872         item = string_list_insert(branch_item->string, show_info->list);
873         item->util = branch_info;
874
875         return 0;
876 }
877
878 int show_local_info_item(struct string_list_item *item, void *cb_data)
879 {
880         struct show_info *show_info = cb_data;
881         struct branch_info *branch_info = item->util;
882         struct string_list *merge = &branch_info->merge;
883         const char *also;
884         int i;
885
886         if (branch_info->rebase && branch_info->merge.nr > 1) {
887                 error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
888                         item->string);
889                 return 0;
890         }
891
892         printf("    %-*s ", show_info->width, item->string);
893         if (branch_info->rebase) {
894                 printf("rebases onto remote %s\n", merge->items[0].string);
895                 return 0;
896         } else if (show_info->any_rebase) {
897                 printf(" merges with remote %s\n", merge->items[0].string);
898                 also = "    and with remote";
899         } else {
900                 printf("merges with remote %s\n", merge->items[0].string);
901                 also = "   and with remote";
902         }
903         for (i = 1; i < merge->nr; i++)
904                 printf("    %-*s %s %s\n", show_info->width, "", also,
905                        merge->items[i].string);
906
907         return 0;
908 }
909
910 int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
911 {
912         struct show_info *show_info = cb_data;
913         struct push_info *push_info = push_item->util;
914         struct string_list_item *item;
915         int n;
916         if ((n = strlen(push_item->string)) > show_info->width)
917                 show_info->width = n;
918         if ((n = strlen(push_info->dest)) > show_info->width2)
919                 show_info->width2 = n;
920         item = string_list_append(push_item->string, show_info->list);
921         item->util = push_item->util;
922         return 0;
923 }
924
925 /*
926  * Sorting comparison for a string list that has push_info
927  * structs in its util field
928  */
929 static int cmp_string_with_push(const void *va, const void *vb)
930 {
931         const struct string_list_item *a = va;
932         const struct string_list_item *b = vb;
933         const struct push_info *a_push = a->util;
934         const struct push_info *b_push = b->util;
935         int cmp = strcmp(a->string, b->string);
936         return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
937 }
938
939 int show_push_info_item(struct string_list_item *item, void *cb_data)
940 {
941         struct show_info *show_info = cb_data;
942         struct push_info *push_info = item->util;
943         char *src = item->string, *status = NULL;
944
945         switch (push_info->status) {
946         case PUSH_STATUS_CREATE:
947                 status = "create";
948                 break;
949         case PUSH_STATUS_DELETE:
950                 status = "delete";
951                 src = "(none)";
952                 break;
953         case PUSH_STATUS_UPTODATE:
954                 status = "up to date";
955                 break;
956         case PUSH_STATUS_FASTFORWARD:
957                 status = "fast forwardable";
958                 break;
959         case PUSH_STATUS_OUTOFDATE:
960                 status = "local out of date";
961                 break;
962         case PUSH_STATUS_NOTQUERIED:
963                 break;
964         }
965         if (status)
966                 printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
967                         push_info->forced ? "forces" : "pushes",
968                         show_info->width2, push_info->dest, status);
969         else
970                 printf("    %-*s %s to %s\n", show_info->width, src,
971                         push_info->forced ? "forces" : "pushes",
972                         push_info->dest);
973         return 0;
974 }
975
976 static int show(int argc, const char **argv)
977 {
978         int no_query = 0, result = 0, query_flag = 0;
979         struct option options[] = {
980                 OPT_GROUP("show specific options"),
981                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
982                 OPT_END()
983         };
984         struct ref_states states;
985         struct string_list info_list = { NULL, 0, 0, 0 };
986         struct show_info info;
987
988         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
989
990         if (argc < 1)
991                 return show_all();
992
993         if (!no_query)
994                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
995
996         memset(&states, 0, sizeof(states));
997         memset(&info, 0, sizeof(info));
998         info.states = &states;
999         info.list = &info_list;
1000         for (; argc; argc--, argv++) {
1001                 int i;
1002
1003                 get_remote_ref_states(*argv, &states, query_flag);
1004
1005                 printf("* remote %s\n  URL: %s\n", *argv,
1006                         states.remote->url_nr > 0 ?
1007                                 states.remote->url[0] : "(no URL)");
1008                 if (no_query)
1009                         printf("  HEAD branch: (not queried)\n");
1010                 else if (!states.heads.nr)
1011                         printf("  HEAD branch: (unknown)\n");
1012                 else if (states.heads.nr == 1)
1013                         printf("  HEAD branch: %s\n", states.heads.items[0].string);
1014                 else {
1015                         printf("  HEAD branch (remote HEAD is ambiguous,"
1016                                " may be one of the following):\n");
1017                         for (i = 0; i < states.heads.nr; i++)
1018                                 printf("    %s\n", states.heads.items[i].string);
1019                 }
1020
1021                 /* remote branch info */
1022                 info.width = 0;
1023                 for_each_string_list(add_remote_to_show_info, &states.new, &info);
1024                 for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1025                 for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1026                 if (info.list->nr)
1027                         printf("  Remote branch%s:%s\n",
1028                                info.list->nr > 1 ? "es" : "",
1029                                 no_query ? " (status not queried)" : "");
1030                 for_each_string_list(show_remote_info_item, info.list, &info);
1031                 string_list_clear(info.list, 0);
1032
1033                 /* git pull info */
1034                 info.width = 0;
1035                 info.any_rebase = 0;
1036                 for_each_string_list(add_local_to_show_info, &branch_list, &info);
1037                 if (info.list->nr)
1038                         printf("  Local branch%s configured for 'git pull':\n",
1039                                info.list->nr > 1 ? "es" : "");
1040                 for_each_string_list(show_local_info_item, info.list, &info);
1041                 string_list_clear(info.list, 0);
1042
1043                 /* git push info */
1044                 if (states.remote->mirror)
1045                         printf("  Local refs will be mirrored by 'git push'\n");
1046
1047                 info.width = info.width2 = 0;
1048                 for_each_string_list(add_push_to_show_info, &states.push, &info);
1049                 qsort(info.list->items, info.list->nr,
1050                         sizeof(*info.list->items), cmp_string_with_push);
1051                 if (info.list->nr)
1052                         printf("  Local ref%s configured for 'git push'%s:\n",
1053                                 info.list->nr > 1 ? "s" : "",
1054                                 no_query ? " (status not queried)" : "");
1055                 for_each_string_list(show_push_info_item, info.list, &info);
1056                 string_list_clear(info.list, 0);
1057
1058                 free_remote_ref_states(&states);
1059         }
1060
1061         return result;
1062 }
1063
1064 static int set_head(int argc, const char **argv)
1065 {
1066         int i, opt_a = 0, opt_d = 0, result = 0;
1067         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1068         char *head_name = NULL;
1069
1070         struct option options[] = {
1071                 OPT_GROUP("set-head specific options"),
1072                 OPT_BOOLEAN('a', "auto", &opt_a,
1073                             "set refs/remotes/<name>/HEAD according to remote"),
1074                 OPT_BOOLEAN('d', "delete", &opt_d,
1075                             "delete refs/remotes/<name>/HEAD"),
1076                 OPT_END()
1077         };
1078         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1079         if (argc)
1080                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1081
1082         if (!opt_a && !opt_d && argc == 2) {
1083                 head_name = xstrdup(argv[1]);
1084         } else if (opt_a && !opt_d && argc == 1) {
1085                 struct ref_states states;
1086                 memset(&states, 0, sizeof(states));
1087                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1088                 if (!states.heads.nr)
1089                         result |= error("Cannot determine remote HEAD");
1090                 else if (states.heads.nr > 1) {
1091                         result |= error("Multiple remote HEAD branches. "
1092                                         "Please choose one explicitly with:");
1093                         for (i = 0; i < states.heads.nr; i++)
1094                                 fprintf(stderr, "  git remote set-head %s %s\n",
1095                                         argv[0], states.heads.items[i].string);
1096                 } else
1097                         head_name = xstrdup(states.heads.items[0].string);
1098                 free_remote_ref_states(&states);
1099         } else if (opt_d && !opt_a && argc == 1) {
1100                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1101                         result |= error("Could not delete %s", buf.buf);
1102         } else
1103                 usage_with_options(builtin_remote_usage, options);
1104
1105         if (head_name) {
1106                 unsigned char sha1[20];
1107                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1108                 /* make sure it's valid */
1109                 if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1110                         result |= error("Not a valid ref: %s", buf2.buf);
1111                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1112                         result |= error("Could not setup %s", buf.buf);
1113                 if (opt_a)
1114                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1115                 free(head_name);
1116         }
1117
1118         strbuf_release(&buf);
1119         strbuf_release(&buf2);
1120         return result;
1121 }
1122
1123 static int prune(int argc, const char **argv)
1124 {
1125         int dry_run = 0, result = 0;
1126         struct option options[] = {
1127                 OPT_GROUP("prune specific options"),
1128                 OPT__DRY_RUN(&dry_run),
1129                 OPT_END()
1130         };
1131         struct ref_states states;
1132         const char *dangling_msg;
1133
1134         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1135
1136         if (argc < 1)
1137                 usage_with_options(builtin_remote_usage, options);
1138
1139         dangling_msg = (dry_run
1140                         ? " %s will become dangling!\n"
1141                         : " %s has become dangling!\n");
1142
1143         memset(&states, 0, sizeof(states));
1144         for (; argc; argc--, argv++) {
1145                 int i;
1146
1147                 get_remote_ref_states(*argv, &states, GET_REF_STATES);
1148
1149                 if (states.stale.nr) {
1150                         printf("Pruning %s\n", *argv);
1151                         printf("URL: %s\n",
1152                                states.remote->url_nr
1153                                ? states.remote->url[0]
1154                                : "(no URL)");
1155                 }
1156
1157                 for (i = 0; i < states.stale.nr; i++) {
1158                         const char *refname = states.stale.items[i].util;
1159
1160                         if (!dry_run)
1161                                 result |= delete_ref(refname, NULL, 0);
1162
1163                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1164                                abbrev_ref(refname, "refs/remotes/"));
1165                         warn_dangling_symref(dangling_msg, refname);
1166                 }
1167
1168                 free_remote_ref_states(&states);
1169         }
1170
1171         return result;
1172 }
1173
1174 static int get_one_remote_for_update(struct remote *remote, void *priv)
1175 {
1176         struct string_list *list = priv;
1177         if (!remote->skip_default_update)
1178                 string_list_append(remote->name, list);
1179         return 0;
1180 }
1181
1182 struct remote_group {
1183         const char *name;
1184         struct string_list *list;
1185 } remote_group;
1186
1187 static int get_remote_group(const char *key, const char *value, void *cb)
1188 {
1189         if (!prefixcmp(key, "remotes.") &&
1190                         !strcmp(key + 8, remote_group.name)) {
1191                 /* split list by white space */
1192                 int space = strcspn(value, " \t\n");
1193                 while (*value) {
1194                         if (space > 1)
1195                                 string_list_append(xstrndup(value, space),
1196                                                 remote_group.list);
1197                         value += space + (value[space] != '\0');
1198                         space = strcspn(value, " \t\n");
1199                 }
1200         }
1201
1202         return 0;
1203 }
1204
1205 static int update(int argc, const char **argv)
1206 {
1207         int i, result = 0;
1208         struct string_list list = { NULL, 0, 0, 0 };
1209         static const char *default_argv[] = { NULL, "default", NULL };
1210
1211         if (argc < 2) {
1212                 argc = 2;
1213                 argv = default_argv;
1214         }
1215
1216         remote_group.list = &list;
1217         for (i = 1; i < argc; i++) {
1218                 remote_group.name = argv[i];
1219                 result = git_config(get_remote_group, NULL);
1220         }
1221
1222         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1223                 result = for_each_remote(get_one_remote_for_update, &list);
1224
1225         for (i = 0; i < list.nr; i++)
1226                 result |= fetch_remote(list.items[i].string);
1227
1228         /* all names were strdup()ed or strndup()ed */
1229         list.strdup_strings = 1;
1230         string_list_clear(&list, 0);
1231
1232         return result;
1233 }
1234
1235 static int get_one_entry(struct remote *remote, void *priv)
1236 {
1237         struct string_list *list = priv;
1238
1239         if (remote->url_nr > 0) {
1240                 int i;
1241
1242                 for (i = 0; i < remote->url_nr; i++)
1243                         string_list_append(remote->name, list)->util = (void *)remote->url[i];
1244         } else
1245                 string_list_append(remote->name, list)->util = NULL;
1246
1247         return 0;
1248 }
1249
1250 static int show_all(void)
1251 {
1252         struct string_list list = { NULL, 0, 0 };
1253         int result = for_each_remote(get_one_entry, &list);
1254
1255         if (!result) {
1256                 int i;
1257
1258                 sort_string_list(&list);
1259                 for (i = 0; i < list.nr; i++) {
1260                         struct string_list_item *item = list.items + i;
1261                         if (verbose)
1262                                 printf("%s\t%s\n", item->string,
1263                                         item->util ? (const char *)item->util : "");
1264                         else {
1265                                 if (i && !strcmp((item - 1)->string, item->string))
1266                                         continue;
1267                                 printf("%s\n", item->string);
1268                         }
1269                 }
1270         }
1271         return result;
1272 }
1273
1274 int cmd_remote(int argc, const char **argv, const char *prefix)
1275 {
1276         struct option options[] = {
1277                 OPT__VERBOSE(&verbose),
1278                 OPT_END()
1279         };
1280         int result;
1281
1282         argc = parse_options(argc, argv, options, builtin_remote_usage,
1283                 PARSE_OPT_STOP_AT_NON_OPTION);
1284
1285         if (argc < 1)
1286                 result = show_all();
1287         else if (!strcmp(argv[0], "add"))
1288                 result = add(argc, argv);
1289         else if (!strcmp(argv[0], "rename"))
1290                 result = mv(argc, argv);
1291         else if (!strcmp(argv[0], "rm"))
1292                 result = rm(argc, argv);
1293         else if (!strcmp(argv[0], "set-head"))
1294                 result = set_head(argc, argv);
1295         else if (!strcmp(argv[0], "show"))
1296                 result = show(argc, argv);
1297         else if (!strcmp(argv[0], "prune"))
1298                 result = prune(argc, argv);
1299         else if (!strcmp(argv[0], "update"))
1300                 result = update(argc, argv);
1301         else {
1302                 error("Unknown subcommand: %s", argv[0]);
1303                 usage_with_options(builtin_remote_usage, options);
1304         }
1305
1306         return result ? 1 : 0;
1307 }