Merge branch 'sb/hashmap-cleanup'
[git] / builtin / fetch.c
1 /*
2  * "git fetch"
3  */
4 #include "cache.h"
5 #include "config.h"
6 #include "refs.h"
7 #include "commit.h"
8 #include "builtin.h"
9 #include "string-list.h"
10 #include "remote.h"
11 #include "transport.h"
12 #include "run-command.h"
13 #include "parse-options.h"
14 #include "sigchain.h"
15 #include "submodule-config.h"
16 #include "submodule.h"
17 #include "connected.h"
18 #include "argv-array.h"
19 #include "utf8.h"
20
21 static const char * const builtin_fetch_usage[] = {
22         N_("git fetch [<options>] [<repository> [<refspec>...]]"),
23         N_("git fetch [<options>] <group>"),
24         N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
25         N_("git fetch --all [<options>]"),
26         NULL
27 };
28
29 enum {
30         TAGS_UNSET = 0,
31         TAGS_DEFAULT = 1,
32         TAGS_SET = 2
33 };
34
35 static int fetch_prune_config = -1; /* unspecified */
36 static int prune = -1; /* unspecified */
37 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
38
39 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
40 static int progress = -1;
41 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
42 static int max_children = -1;
43 static enum transport_family family;
44 static const char *depth;
45 static const char *deepen_since;
46 static const char *upload_pack;
47 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
48 static struct strbuf default_rla = STRBUF_INIT;
49 static struct transport *gtransport;
50 static struct transport *gsecondary;
51 static const char *submodule_prefix = "";
52 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
53 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
54 static int shown_url = 0;
55 static int refmap_alloc, refmap_nr;
56 static const char **refmap_array;
57
58 static int git_fetch_config(const char *k, const char *v, void *cb)
59 {
60         if (!strcmp(k, "fetch.prune")) {
61                 fetch_prune_config = git_config_bool(k, v);
62                 return 0;
63         }
64
65         if (!strcmp(k, "submodule.recurse")) {
66                 int r = git_config_bool(k, v) ?
67                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
68                 recurse_submodules = r;
69         }
70
71         return git_default_config(k, v, cb);
72 }
73
74 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
75 {
76         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
77
78         /*
79          * "git fetch --refmap='' origin foo"
80          * can be used to tell the command not to store anywhere
81          */
82         if (*arg)
83                 refmap_array[refmap_nr++] = arg;
84         return 0;
85 }
86
87 static struct option builtin_fetch_options[] = {
88         OPT__VERBOSITY(&verbosity),
89         OPT_BOOL(0, "all", &all,
90                  N_("fetch from all remotes")),
91         OPT_BOOL('a', "append", &append,
92                  N_("append to .git/FETCH_HEAD instead of overwriting")),
93         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
94                    N_("path to upload pack on remote end")),
95         OPT__FORCE(&force, N_("force overwrite of local branch")),
96         OPT_BOOL('m', "multiple", &multiple,
97                  N_("fetch from multiple remotes")),
98         OPT_SET_INT('t', "tags", &tags,
99                     N_("fetch all tags and associated objects"), TAGS_SET),
100         OPT_SET_INT('n', NULL, &tags,
101                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
102         OPT_INTEGER('j', "jobs", &max_children,
103                     N_("number of submodules fetched in parallel")),
104         OPT_BOOL('p', "prune", &prune,
105                  N_("prune remote-tracking branches no longer on remote")),
106         { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
107                     N_("control recursive fetching of submodules"),
108                     PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
109         OPT_BOOL(0, "dry-run", &dry_run,
110                  N_("dry run")),
111         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
112         OPT_BOOL('u', "update-head-ok", &update_head_ok,
113                     N_("allow updating of HEAD ref")),
114         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
115         OPT_STRING(0, "depth", &depth, N_("depth"),
116                    N_("deepen history of shallow clone")),
117         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
118                    N_("deepen history of shallow repository based on time")),
119         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
120                         N_("deepen history of shallow clone, excluding rev")),
121         OPT_INTEGER(0, "deepen", &deepen_relative,
122                     N_("deepen history of shallow clone")),
123         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
124                    N_("convert to a complete repository"),
125                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
126         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
127                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
128         { OPTION_CALLBACK, 0, "recurse-submodules-default",
129                    &recurse_submodules_default, N_("on-demand"),
130                    N_("default for recursive fetching of submodules "
131                       "(lower priority than config files)"),
132                    PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
133         OPT_BOOL(0, "update-shallow", &update_shallow,
134                  N_("accept refs that update .git/shallow")),
135         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
136           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
137         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
138                         TRANSPORT_FAMILY_IPV4),
139         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
140                         TRANSPORT_FAMILY_IPV6),
141         OPT_END()
142 };
143
144 static void unlock_pack(void)
145 {
146         if (gtransport)
147                 transport_unlock_pack(gtransport);
148         if (gsecondary)
149                 transport_unlock_pack(gsecondary);
150 }
151
152 static void unlock_pack_on_signal(int signo)
153 {
154         unlock_pack();
155         sigchain_pop(signo);
156         raise(signo);
157 }
158
159 static void add_merge_config(struct ref **head,
160                            const struct ref *remote_refs,
161                            struct branch *branch,
162                            struct ref ***tail)
163 {
164         int i;
165
166         for (i = 0; i < branch->merge_nr; i++) {
167                 struct ref *rm, **old_tail = *tail;
168                 struct refspec refspec;
169
170                 for (rm = *head; rm; rm = rm->next) {
171                         if (branch_merge_matches(branch, i, rm->name)) {
172                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
173                                 break;
174                         }
175                 }
176                 if (rm)
177                         continue;
178
179                 /*
180                  * Not fetched to a remote-tracking branch?  We need to fetch
181                  * it anyway to allow this branch's "branch.$name.merge"
182                  * to be honored by 'git pull', but we do not have to
183                  * fail if branch.$name.merge is misconfigured to point
184                  * at a nonexisting branch.  If we were indeed called by
185                  * 'git pull', it will notice the misconfiguration because
186                  * there is no entry in the resulting FETCH_HEAD marked
187                  * for merging.
188                  */
189                 memset(&refspec, 0, sizeof(refspec));
190                 refspec.src = branch->merge[i]->src;
191                 get_fetch_map(remote_refs, &refspec, tail, 1);
192                 for (rm = *old_tail; rm; rm = rm->next)
193                         rm->fetch_head_status = FETCH_HEAD_MERGE;
194         }
195 }
196
197 static int add_existing(const char *refname, const struct object_id *oid,
198                         int flag, void *cbdata)
199 {
200         struct string_list *list = (struct string_list *)cbdata;
201         struct string_list_item *item = string_list_insert(list, refname);
202         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
203
204         oidcpy(old_oid, oid);
205         item->util = old_oid;
206         return 0;
207 }
208
209 static int will_fetch(struct ref **head, const unsigned char *sha1)
210 {
211         struct ref *rm = *head;
212         while (rm) {
213                 if (!hashcmp(rm->old_oid.hash, sha1))
214                         return 1;
215                 rm = rm->next;
216         }
217         return 0;
218 }
219
220 static void find_non_local_tags(struct transport *transport,
221                         struct ref **head,
222                         struct ref ***tail)
223 {
224         struct string_list existing_refs = STRING_LIST_INIT_DUP;
225         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
226         const struct ref *ref;
227         struct string_list_item *item = NULL;
228
229         for_each_ref(add_existing, &existing_refs);
230         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
231                 if (!starts_with(ref->name, "refs/tags/"))
232                         continue;
233
234                 /*
235                  * The peeled ref always follows the matching base
236                  * ref, so if we see a peeled ref that we don't want
237                  * to fetch then we can mark the ref entry in the list
238                  * as one to ignore by setting util to NULL.
239                  */
240                 if (ends_with(ref->name, "^{}")) {
241                         if (item &&
242                             !has_object_file_with_flags(&ref->old_oid,
243                                                         OBJECT_INFO_QUICK) &&
244                             !will_fetch(head, ref->old_oid.hash) &&
245                             !has_sha1_file_with_flags(item->util,
246                                                       OBJECT_INFO_QUICK) &&
247                             !will_fetch(head, item->util))
248                                 item->util = NULL;
249                         item = NULL;
250                         continue;
251                 }
252
253                 /*
254                  * If item is non-NULL here, then we previously saw a
255                  * ref not followed by a peeled reference, so we need
256                  * to check if it is a lightweight tag that we want to
257                  * fetch.
258                  */
259                 if (item &&
260                     !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
261                     !will_fetch(head, item->util))
262                         item->util = NULL;
263
264                 item = NULL;
265
266                 /* skip duplicates and refs that we already have */
267                 if (string_list_has_string(&remote_refs, ref->name) ||
268                     string_list_has_string(&existing_refs, ref->name))
269                         continue;
270
271                 item = string_list_insert(&remote_refs, ref->name);
272                 item->util = (void *)&ref->old_oid;
273         }
274         string_list_clear(&existing_refs, 1);
275
276         /*
277          * We may have a final lightweight tag that needs to be
278          * checked to see if it needs fetching.
279          */
280         if (item &&
281             !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
282             !will_fetch(head, item->util))
283                 item->util = NULL;
284
285         /*
286          * For all the tags in the remote_refs string list,
287          * add them to the list of refs to be fetched
288          */
289         for_each_string_list_item(item, &remote_refs) {
290                 /* Unless we have already decided to ignore this item... */
291                 if (item->util)
292                 {
293                         struct ref *rm = alloc_ref(item->string);
294                         rm->peer_ref = alloc_ref(item->string);
295                         oidcpy(&rm->old_oid, item->util);
296                         **tail = rm;
297                         *tail = &rm->next;
298                 }
299         }
300
301         string_list_clear(&remote_refs, 0);
302 }
303
304 static struct ref *get_ref_map(struct transport *transport,
305                                struct refspec *refspecs, int refspec_count,
306                                int tags, int *autotags)
307 {
308         int i;
309         struct ref *rm;
310         struct ref *ref_map = NULL;
311         struct ref **tail = &ref_map;
312
313         /* opportunistically-updated references: */
314         struct ref *orefs = NULL, **oref_tail = &orefs;
315
316         const struct ref *remote_refs = transport_get_remote_refs(transport);
317
318         if (refspec_count) {
319                 struct refspec *fetch_refspec;
320                 int fetch_refspec_nr;
321
322                 for (i = 0; i < refspec_count; i++) {
323                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
324                         if (refspecs[i].dst && refspecs[i].dst[0])
325                                 *autotags = 1;
326                 }
327                 /* Merge everything on the command line (but not --tags) */
328                 for (rm = ref_map; rm; rm = rm->next)
329                         rm->fetch_head_status = FETCH_HEAD_MERGE;
330
331                 /*
332                  * For any refs that we happen to be fetching via
333                  * command-line arguments, the destination ref might
334                  * have been missing or have been different than the
335                  * remote-tracking ref that would be derived from the
336                  * configured refspec.  In these cases, we want to
337                  * take the opportunity to update their configured
338                  * remote-tracking reference.  However, we do not want
339                  * to mention these entries in FETCH_HEAD at all, as
340                  * they would simply be duplicates of existing
341                  * entries, so we set them FETCH_HEAD_IGNORE below.
342                  *
343                  * We compute these entries now, based only on the
344                  * refspecs specified on the command line.  But we add
345                  * them to the list following the refspecs resulting
346                  * from the tags option so that one of the latter,
347                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
348                  * by ref_remove_duplicates() in favor of one of these
349                  * opportunistic entries with FETCH_HEAD_IGNORE.
350                  */
351                 if (refmap_array) {
352                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
353                         fetch_refspec_nr = refmap_nr;
354                 } else {
355                         fetch_refspec = transport->remote->fetch;
356                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
357                 }
358
359                 for (i = 0; i < fetch_refspec_nr; i++)
360                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
361         } else if (refmap_array) {
362                 die("--refmap option is only meaningful with command-line refspec(s).");
363         } else {
364                 /* Use the defaults */
365                 struct remote *remote = transport->remote;
366                 struct branch *branch = branch_get(NULL);
367                 int has_merge = branch_has_merge_config(branch);
368                 if (remote &&
369                     (remote->fetch_refspec_nr ||
370                      /* Note: has_merge implies non-NULL branch->remote_name */
371                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
372                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
373                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
374                                 if (remote->fetch[i].dst &&
375                                     remote->fetch[i].dst[0])
376                                         *autotags = 1;
377                                 if (!i && !has_merge && ref_map &&
378                                     !remote->fetch[0].pattern)
379                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
380                         }
381                         /*
382                          * if the remote we're fetching from is the same
383                          * as given in branch.<name>.remote, we add the
384                          * ref given in branch.<name>.merge, too.
385                          *
386                          * Note: has_merge implies non-NULL branch->remote_name
387                          */
388                         if (has_merge &&
389                             !strcmp(branch->remote_name, remote->name))
390                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
391                 } else {
392                         ref_map = get_remote_ref(remote_refs, "HEAD");
393                         if (!ref_map)
394                                 die(_("Couldn't find remote ref HEAD"));
395                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
396                         tail = &ref_map->next;
397                 }
398         }
399
400         if (tags == TAGS_SET)
401                 /* also fetch all tags */
402                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
403         else if (tags == TAGS_DEFAULT && *autotags)
404                 find_non_local_tags(transport, &ref_map, &tail);
405
406         /* Now append any refs to be updated opportunistically: */
407         *tail = orefs;
408         for (rm = orefs; rm; rm = rm->next) {
409                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
410                 tail = &rm->next;
411         }
412
413         return ref_remove_duplicates(ref_map);
414 }
415
416 #define STORE_REF_ERROR_OTHER 1
417 #define STORE_REF_ERROR_DF_CONFLICT 2
418
419 static int s_update_ref(const char *action,
420                         struct ref *ref,
421                         int check_old)
422 {
423         char *msg;
424         char *rla = getenv("GIT_REFLOG_ACTION");
425         struct ref_transaction *transaction;
426         struct strbuf err = STRBUF_INIT;
427         int ret, df_conflict = 0;
428
429         if (dry_run)
430                 return 0;
431         if (!rla)
432                 rla = default_rla.buf;
433         msg = xstrfmt("%s: %s", rla, action);
434
435         transaction = ref_transaction_begin(&err);
436         if (!transaction ||
437             ref_transaction_update(transaction, ref->name,
438                                    ref->new_oid.hash,
439                                    check_old ? ref->old_oid.hash : NULL,
440                                    0, msg, &err))
441                 goto fail;
442
443         ret = ref_transaction_commit(transaction, &err);
444         if (ret) {
445                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
446                 goto fail;
447         }
448
449         ref_transaction_free(transaction);
450         strbuf_release(&err);
451         free(msg);
452         return 0;
453 fail:
454         ref_transaction_free(transaction);
455         error("%s", err.buf);
456         strbuf_release(&err);
457         free(msg);
458         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
459                            : STORE_REF_ERROR_OTHER;
460 }
461
462 static int refcol_width = 10;
463 static int compact_format;
464
465 static void adjust_refcol_width(const struct ref *ref)
466 {
467         int max, rlen, llen, len;
468
469         /* uptodate lines are only shown on high verbosity level */
470         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
471                 return;
472
473         max    = term_columns();
474         rlen   = utf8_strwidth(prettify_refname(ref->name));
475
476         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
477
478         /*
479          * rough estimation to see if the output line is too long and
480          * should not be counted (we can't do precise calculation
481          * anyway because we don't know if the error explanation part
482          * will be printed in update_local_ref)
483          */
484         if (compact_format) {
485                 llen = 0;
486                 max = max * 2 / 3;
487         }
488         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
489         if (len >= max)
490                 return;
491
492         /*
493          * Not precise calculation for compact mode because '*' can
494          * appear on the left hand side of '->' and shrink the column
495          * back.
496          */
497         if (refcol_width < rlen)
498                 refcol_width = rlen;
499 }
500
501 static void prepare_format_display(struct ref *ref_map)
502 {
503         struct ref *rm;
504         const char *format = "full";
505
506         git_config_get_string_const("fetch.output", &format);
507         if (!strcasecmp(format, "full"))
508                 compact_format = 0;
509         else if (!strcasecmp(format, "compact"))
510                 compact_format = 1;
511         else
512                 die(_("configuration fetch.output contains invalid value %s"),
513                     format);
514
515         for (rm = ref_map; rm; rm = rm->next) {
516                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
517                     !rm->peer_ref ||
518                     !strcmp(rm->name, "HEAD"))
519                         continue;
520
521                 adjust_refcol_width(rm);
522         }
523 }
524
525 static void print_remote_to_local(struct strbuf *display,
526                                   const char *remote, const char *local)
527 {
528         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
529 }
530
531 static int find_and_replace(struct strbuf *haystack,
532                             const char *needle,
533                             const char *placeholder)
534 {
535         const char *p = strstr(haystack->buf, needle);
536         int plen, nlen;
537
538         if (!p)
539                 return 0;
540
541         if (p > haystack->buf && p[-1] != '/')
542                 return 0;
543
544         plen = strlen(p);
545         nlen = strlen(needle);
546         if (plen > nlen && p[nlen] != '/')
547                 return 0;
548
549         strbuf_splice(haystack, p - haystack->buf, nlen,
550                       placeholder, strlen(placeholder));
551         return 1;
552 }
553
554 static void print_compact(struct strbuf *display,
555                           const char *remote, const char *local)
556 {
557         struct strbuf r = STRBUF_INIT;
558         struct strbuf l = STRBUF_INIT;
559
560         if (!strcmp(remote, local)) {
561                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
562                 return;
563         }
564
565         strbuf_addstr(&r, remote);
566         strbuf_addstr(&l, local);
567
568         if (!find_and_replace(&r, local, "*"))
569                 find_and_replace(&l, remote, "*");
570         print_remote_to_local(display, r.buf, l.buf);
571
572         strbuf_release(&r);
573         strbuf_release(&l);
574 }
575
576 static void format_display(struct strbuf *display, char code,
577                            const char *summary, const char *error,
578                            const char *remote, const char *local,
579                            int summary_width)
580 {
581         int width = (summary_width + strlen(summary) - gettext_width(summary));
582
583         strbuf_addf(display, "%c %-*s ", code, width, summary);
584         if (!compact_format)
585                 print_remote_to_local(display, remote, local);
586         else
587                 print_compact(display, remote, local);
588         if (error)
589                 strbuf_addf(display, "  (%s)", error);
590 }
591
592 static int update_local_ref(struct ref *ref,
593                             const char *remote,
594                             const struct ref *remote_ref,
595                             struct strbuf *display,
596                             int summary_width)
597 {
598         struct commit *current = NULL, *updated;
599         enum object_type type;
600         struct branch *current_branch = branch_get(NULL);
601         const char *pretty_ref = prettify_refname(ref->name);
602
603         type = sha1_object_info(ref->new_oid.hash, NULL);
604         if (type < 0)
605                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
606
607         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
608                 if (verbosity > 0)
609                         format_display(display, '=', _("[up to date]"), NULL,
610                                        remote, pretty_ref, summary_width);
611                 return 0;
612         }
613
614         if (current_branch &&
615             !strcmp(ref->name, current_branch->name) &&
616             !(update_head_ok || is_bare_repository()) &&
617             !is_null_oid(&ref->old_oid)) {
618                 /*
619                  * If this is the head, and it's not okay to update
620                  * the head, and the old value of the head isn't empty...
621                  */
622                 format_display(display, '!', _("[rejected]"),
623                                _("can't fetch in current branch"),
624                                remote, pretty_ref, summary_width);
625                 return 1;
626         }
627
628         if (!is_null_oid(&ref->old_oid) &&
629             starts_with(ref->name, "refs/tags/")) {
630                 int r;
631                 r = s_update_ref("updating tag", ref, 0);
632                 format_display(display, r ? '!' : 't', _("[tag update]"),
633                                r ? _("unable to update local ref") : NULL,
634                                remote, pretty_ref, summary_width);
635                 return r;
636         }
637
638         current = lookup_commit_reference_gently(&ref->old_oid, 1);
639         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
640         if (!current || !updated) {
641                 const char *msg;
642                 const char *what;
643                 int r;
644                 /*
645                  * Nicely describe the new ref we're fetching.
646                  * Base this on the remote's ref name, as it's
647                  * more likely to follow a standard layout.
648                  */
649                 const char *name = remote_ref ? remote_ref->name : "";
650                 if (starts_with(name, "refs/tags/")) {
651                         msg = "storing tag";
652                         what = _("[new tag]");
653                 } else if (starts_with(name, "refs/heads/")) {
654                         msg = "storing head";
655                         what = _("[new branch]");
656                 } else {
657                         msg = "storing ref";
658                         what = _("[new ref]");
659                 }
660
661                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
662                     (recurse_submodules != RECURSE_SUBMODULES_ON))
663                         check_for_new_submodule_commits(&ref->new_oid);
664                 r = s_update_ref(msg, ref, 0);
665                 format_display(display, r ? '!' : '*', what,
666                                r ? _("unable to update local ref") : NULL,
667                                remote, pretty_ref, summary_width);
668                 return r;
669         }
670
671         if (in_merge_bases(current, updated)) {
672                 struct strbuf quickref = STRBUF_INIT;
673                 int r;
674                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
675                 strbuf_addstr(&quickref, "..");
676                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
677                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
678                     (recurse_submodules != RECURSE_SUBMODULES_ON))
679                         check_for_new_submodule_commits(&ref->new_oid);
680                 r = s_update_ref("fast-forward", ref, 1);
681                 format_display(display, r ? '!' : ' ', quickref.buf,
682                                r ? _("unable to update local ref") : NULL,
683                                remote, pretty_ref, summary_width);
684                 strbuf_release(&quickref);
685                 return r;
686         } else if (force || ref->force) {
687                 struct strbuf quickref = STRBUF_INIT;
688                 int r;
689                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
690                 strbuf_addstr(&quickref, "...");
691                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
692                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
693                     (recurse_submodules != RECURSE_SUBMODULES_ON))
694                         check_for_new_submodule_commits(&ref->new_oid);
695                 r = s_update_ref("forced-update", ref, 1);
696                 format_display(display, r ? '!' : '+', quickref.buf,
697                                r ? _("unable to update local ref") : _("forced update"),
698                                remote, pretty_ref, summary_width);
699                 strbuf_release(&quickref);
700                 return r;
701         } else {
702                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
703                                remote, pretty_ref, summary_width);
704                 return 1;
705         }
706 }
707
708 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
709 {
710         struct ref **rm = cb_data;
711         struct ref *ref = *rm;
712
713         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
714                 ref = ref->next;
715         if (!ref)
716                 return -1; /* end of the list */
717         *rm = ref->next;
718         hashcpy(sha1, ref->old_oid.hash);
719         return 0;
720 }
721
722 static int store_updated_refs(const char *raw_url, const char *remote_name,
723                 struct ref *ref_map)
724 {
725         FILE *fp;
726         struct commit *commit;
727         int url_len, i, rc = 0;
728         struct strbuf note = STRBUF_INIT;
729         const char *what, *kind;
730         struct ref *rm;
731         char *url;
732         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
733         int want_status;
734         int summary_width = transport_summary_width(ref_map);
735
736         fp = fopen(filename, "a");
737         if (!fp)
738                 return error_errno(_("cannot open %s"), filename);
739
740         if (raw_url)
741                 url = transport_anonymize_url(raw_url);
742         else
743                 url = xstrdup("foreign");
744
745         rm = ref_map;
746         if (check_connected(iterate_ref_map, &rm, NULL)) {
747                 rc = error(_("%s did not send all necessary objects\n"), url);
748                 goto abort;
749         }
750
751         prepare_format_display(ref_map);
752
753         /*
754          * We do a pass for each fetch_head_status type in their enum order, so
755          * merged entries are written before not-for-merge. That lets readers
756          * use FETCH_HEAD as a refname to refer to the ref to be merged.
757          */
758         for (want_status = FETCH_HEAD_MERGE;
759              want_status <= FETCH_HEAD_IGNORE;
760              want_status++) {
761                 for (rm = ref_map; rm; rm = rm->next) {
762                         struct ref *ref = NULL;
763                         const char *merge_status_marker = "";
764
765                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
766                                 if (want_status == FETCH_HEAD_MERGE)
767                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
768                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
769                                 continue;
770                         }
771
772                         commit = lookup_commit_reference_gently(&rm->old_oid,
773                                                                 1);
774                         if (!commit)
775                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
776
777                         if (rm->fetch_head_status != want_status)
778                                 continue;
779
780                         if (rm->peer_ref) {
781                                 ref = alloc_ref(rm->peer_ref->name);
782                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
783                                 oidcpy(&ref->new_oid, &rm->old_oid);
784                                 ref->force = rm->peer_ref->force;
785                         }
786
787
788                         if (!strcmp(rm->name, "HEAD")) {
789                                 kind = "";
790                                 what = "";
791                         }
792                         else if (starts_with(rm->name, "refs/heads/")) {
793                                 kind = "branch";
794                                 what = rm->name + 11;
795                         }
796                         else if (starts_with(rm->name, "refs/tags/")) {
797                                 kind = "tag";
798                                 what = rm->name + 10;
799                         }
800                         else if (starts_with(rm->name, "refs/remotes/")) {
801                                 kind = "remote-tracking branch";
802                                 what = rm->name + 13;
803                         }
804                         else {
805                                 kind = "";
806                                 what = rm->name;
807                         }
808
809                         url_len = strlen(url);
810                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
811                                 ;
812                         url_len = i + 1;
813                         if (4 < i && !strncmp(".git", url + i - 3, 4))
814                                 url_len = i - 3;
815
816                         strbuf_reset(&note);
817                         if (*what) {
818                                 if (*kind)
819                                         strbuf_addf(&note, "%s ", kind);
820                                 strbuf_addf(&note, "'%s' of ", what);
821                         }
822                         switch (rm->fetch_head_status) {
823                         case FETCH_HEAD_NOT_FOR_MERGE:
824                                 merge_status_marker = "not-for-merge";
825                                 /* fall-through */
826                         case FETCH_HEAD_MERGE:
827                                 fprintf(fp, "%s\t%s\t%s",
828                                         oid_to_hex(&rm->old_oid),
829                                         merge_status_marker,
830                                         note.buf);
831                                 for (i = 0; i < url_len; ++i)
832                                         if ('\n' == url[i])
833                                                 fputs("\\n", fp);
834                                         else
835                                                 fputc(url[i], fp);
836                                 fputc('\n', fp);
837                                 break;
838                         default:
839                                 /* do not write anything to FETCH_HEAD */
840                                 break;
841                         }
842
843                         strbuf_reset(&note);
844                         if (ref) {
845                                 rc |= update_local_ref(ref, what, rm, &note,
846                                                        summary_width);
847                                 free(ref);
848                         } else
849                                 format_display(&note, '*',
850                                                *kind ? kind : "branch", NULL,
851                                                *what ? what : "HEAD",
852                                                "FETCH_HEAD", summary_width);
853                         if (note.len) {
854                                 if (verbosity >= 0 && !shown_url) {
855                                         fprintf(stderr, _("From %.*s\n"),
856                                                         url_len, url);
857                                         shown_url = 1;
858                                 }
859                                 if (verbosity >= 0)
860                                         fprintf(stderr, " %s\n", note.buf);
861                         }
862                 }
863         }
864
865         if (rc & STORE_REF_ERROR_DF_CONFLICT)
866                 error(_("some local refs could not be updated; try running\n"
867                       " 'git remote prune %s' to remove any old, conflicting "
868                       "branches"), remote_name);
869
870  abort:
871         strbuf_release(&note);
872         free(url);
873         fclose(fp);
874         return rc;
875 }
876
877 /*
878  * We would want to bypass the object transfer altogether if
879  * everything we are going to fetch already exists and is connected
880  * locally.
881  */
882 static int quickfetch(struct ref *ref_map)
883 {
884         struct ref *rm = ref_map;
885         struct check_connected_options opt = CHECK_CONNECTED_INIT;
886
887         /*
888          * If we are deepening a shallow clone we already have these
889          * objects reachable.  Running rev-list here will return with
890          * a good (0) exit status and we'll bypass the fetch that we
891          * really need to perform.  Claiming failure now will ensure
892          * we perform the network exchange to deepen our history.
893          */
894         if (deepen)
895                 return -1;
896         opt.quiet = 1;
897         return check_connected(iterate_ref_map, &rm, &opt);
898 }
899
900 static int fetch_refs(struct transport *transport, struct ref *ref_map)
901 {
902         int ret = quickfetch(ref_map);
903         if (ret)
904                 ret = transport_fetch_refs(transport, ref_map);
905         if (!ret)
906                 ret |= store_updated_refs(transport->url,
907                                 transport->remote->name,
908                                 ref_map);
909         transport_unlock_pack(transport);
910         return ret;
911 }
912
913 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
914                 const char *raw_url)
915 {
916         int url_len, i, result = 0;
917         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
918         char *url;
919         int summary_width = transport_summary_width(stale_refs);
920         const char *dangling_msg = dry_run
921                 ? _("   (%s will become dangling)")
922                 : _("   (%s has become dangling)");
923
924         if (raw_url)
925                 url = transport_anonymize_url(raw_url);
926         else
927                 url = xstrdup("foreign");
928
929         url_len = strlen(url);
930         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
931                 ;
932
933         url_len = i + 1;
934         if (4 < i && !strncmp(".git", url + i - 3, 4))
935                 url_len = i - 3;
936
937         if (!dry_run) {
938                 struct string_list refnames = STRING_LIST_INIT_NODUP;
939
940                 for (ref = stale_refs; ref; ref = ref->next)
941                         string_list_append(&refnames, ref->name);
942
943                 result = delete_refs("fetch: prune", &refnames, 0);
944                 string_list_clear(&refnames, 0);
945         }
946
947         if (verbosity >= 0) {
948                 for (ref = stale_refs; ref; ref = ref->next) {
949                         struct strbuf sb = STRBUF_INIT;
950                         if (!shown_url) {
951                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
952                                 shown_url = 1;
953                         }
954                         format_display(&sb, '-', _("[deleted]"), NULL,
955                                        _("(none)"), prettify_refname(ref->name),
956                                        summary_width);
957                         fprintf(stderr, " %s\n",sb.buf);
958                         strbuf_release(&sb);
959                         warn_dangling_symref(stderr, dangling_msg, ref->name);
960                 }
961         }
962
963         free(url);
964         free_refs(stale_refs);
965         return result;
966 }
967
968 static void check_not_current_branch(struct ref *ref_map)
969 {
970         struct branch *current_branch = branch_get(NULL);
971
972         if (is_bare_repository() || !current_branch)
973                 return;
974
975         for (; ref_map; ref_map = ref_map->next)
976                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
977                                         ref_map->peer_ref->name))
978                         die(_("Refusing to fetch into current branch %s "
979                             "of non-bare repository"), current_branch->refname);
980 }
981
982 static int truncate_fetch_head(void)
983 {
984         const char *filename = git_path_fetch_head();
985         FILE *fp = fopen_for_writing(filename);
986
987         if (!fp)
988                 return error_errno(_("cannot open %s"), filename);
989         fclose(fp);
990         return 0;
991 }
992
993 static void set_option(struct transport *transport, const char *name, const char *value)
994 {
995         int r = transport_set_option(transport, name, value);
996         if (r < 0)
997                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
998                     name, value, transport->url);
999         if (r > 0)
1000                 warning(_("Option \"%s\" is ignored for %s\n"),
1001                         name, transport->url);
1002 }
1003
1004 static struct transport *prepare_transport(struct remote *remote, int deepen)
1005 {
1006         struct transport *transport;
1007         transport = transport_get(remote, NULL);
1008         transport_set_verbosity(transport, verbosity, progress);
1009         transport->family = family;
1010         if (upload_pack)
1011                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1012         if (keep)
1013                 set_option(transport, TRANS_OPT_KEEP, "yes");
1014         if (depth)
1015                 set_option(transport, TRANS_OPT_DEPTH, depth);
1016         if (deepen && deepen_since)
1017                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1018         if (deepen && deepen_not.nr)
1019                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1020                            (const char *)&deepen_not);
1021         if (deepen_relative)
1022                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1023         if (update_shallow)
1024                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1025         return transport;
1026 }
1027
1028 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1029 {
1030         int cannot_reuse;
1031
1032         /*
1033          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1034          * when remote helper is used (setting it to an empty string
1035          * is not unsetting). We could extend the remote helper
1036          * protocol for that, but for now, just force a new connection
1037          * without deepen-since. Similar story for deepen-not.
1038          */
1039         cannot_reuse = transport->cannot_reuse ||
1040                 deepen_since || deepen_not.nr;
1041         if (cannot_reuse) {
1042                 gsecondary = prepare_transport(transport->remote, 0);
1043                 transport = gsecondary;
1044         }
1045
1046         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1047         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1048         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1049         fetch_refs(transport, ref_map);
1050
1051         if (gsecondary) {
1052                 transport_disconnect(gsecondary);
1053                 gsecondary = NULL;
1054         }
1055 }
1056
1057 static int do_fetch(struct transport *transport,
1058                     struct refspec *refs, int ref_count)
1059 {
1060         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1061         struct ref *ref_map;
1062         struct ref *rm;
1063         int autotags = (transport->remote->fetch_tags == 1);
1064         int retcode = 0;
1065
1066         for_each_ref(add_existing, &existing_refs);
1067
1068         if (tags == TAGS_DEFAULT) {
1069                 if (transport->remote->fetch_tags == 2)
1070                         tags = TAGS_SET;
1071                 if (transport->remote->fetch_tags == -1)
1072                         tags = TAGS_UNSET;
1073         }
1074
1075         if (!transport->get_refs_list || !transport->fetch)
1076                 die(_("Don't know how to fetch from %s"), transport->url);
1077
1078         /* if not appending, truncate FETCH_HEAD */
1079         if (!append && !dry_run) {
1080                 retcode = truncate_fetch_head();
1081                 if (retcode)
1082                         goto cleanup;
1083         }
1084
1085         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1086         if (!update_head_ok)
1087                 check_not_current_branch(ref_map);
1088
1089         for (rm = ref_map; rm; rm = rm->next) {
1090                 if (rm->peer_ref) {
1091                         struct string_list_item *peer_item =
1092                                 string_list_lookup(&existing_refs,
1093                                                    rm->peer_ref->name);
1094                         if (peer_item) {
1095                                 struct object_id *old_oid = peer_item->util;
1096                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1097                         }
1098                 }
1099         }
1100
1101         if (tags == TAGS_DEFAULT && autotags)
1102                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1103         if (prune) {
1104                 /*
1105                  * We only prune based on refspecs specified
1106                  * explicitly (via command line or configuration); we
1107                  * don't care whether --tags was specified.
1108                  */
1109                 if (ref_count) {
1110                         prune_refs(refs, ref_count, ref_map, transport->url);
1111                 } else {
1112                         prune_refs(transport->remote->fetch,
1113                                    transport->remote->fetch_refspec_nr,
1114                                    ref_map,
1115                                    transport->url);
1116                 }
1117         }
1118         if (fetch_refs(transport, ref_map)) {
1119                 free_refs(ref_map);
1120                 retcode = 1;
1121                 goto cleanup;
1122         }
1123         free_refs(ref_map);
1124
1125         /* if neither --no-tags nor --tags was specified, do automated tag
1126          * following ... */
1127         if (tags == TAGS_DEFAULT && autotags) {
1128                 struct ref **tail = &ref_map;
1129                 ref_map = NULL;
1130                 find_non_local_tags(transport, &ref_map, &tail);
1131                 if (ref_map)
1132                         backfill_tags(transport, ref_map);
1133                 free_refs(ref_map);
1134         }
1135
1136  cleanup:
1137         string_list_clear(&existing_refs, 1);
1138         return retcode;
1139 }
1140
1141 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1142 {
1143         struct string_list *list = priv;
1144         if (!remote->skip_default_update)
1145                 string_list_append(list, remote->name);
1146         return 0;
1147 }
1148
1149 struct remote_group_data {
1150         const char *name;
1151         struct string_list *list;
1152 };
1153
1154 static int get_remote_group(const char *key, const char *value, void *priv)
1155 {
1156         struct remote_group_data *g = priv;
1157
1158         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1159                 /* split list by white space */
1160                 while (*value) {
1161                         size_t wordlen = strcspn(value, " \t\n");
1162
1163                         if (wordlen >= 1)
1164                                 string_list_append_nodup(g->list,
1165                                                    xstrndup(value, wordlen));
1166                         value += wordlen + (value[wordlen] != '\0');
1167                 }
1168         }
1169
1170         return 0;
1171 }
1172
1173 static int add_remote_or_group(const char *name, struct string_list *list)
1174 {
1175         int prev_nr = list->nr;
1176         struct remote_group_data g;
1177         g.name = name; g.list = list;
1178
1179         git_config(get_remote_group, &g);
1180         if (list->nr == prev_nr) {
1181                 struct remote *remote = remote_get(name);
1182                 if (!remote_is_configured(remote, 0))
1183                         return 0;
1184                 string_list_append(list, remote->name);
1185         }
1186         return 1;
1187 }
1188
1189 static void add_options_to_argv(struct argv_array *argv)
1190 {
1191         if (dry_run)
1192                 argv_array_push(argv, "--dry-run");
1193         if (prune != -1)
1194                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1195         if (update_head_ok)
1196                 argv_array_push(argv, "--update-head-ok");
1197         if (force)
1198                 argv_array_push(argv, "--force");
1199         if (keep)
1200                 argv_array_push(argv, "--keep");
1201         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1202                 argv_array_push(argv, "--recurse-submodules");
1203         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1204                 argv_array_push(argv, "--recurse-submodules=on-demand");
1205         if (tags == TAGS_SET)
1206                 argv_array_push(argv, "--tags");
1207         else if (tags == TAGS_UNSET)
1208                 argv_array_push(argv, "--no-tags");
1209         if (verbosity >= 2)
1210                 argv_array_push(argv, "-v");
1211         if (verbosity >= 1)
1212                 argv_array_push(argv, "-v");
1213         else if (verbosity < 0)
1214                 argv_array_push(argv, "-q");
1215
1216 }
1217
1218 static int fetch_multiple(struct string_list *list)
1219 {
1220         int i, result = 0;
1221         struct argv_array argv = ARGV_ARRAY_INIT;
1222
1223         if (!append && !dry_run) {
1224                 int errcode = truncate_fetch_head();
1225                 if (errcode)
1226                         return errcode;
1227         }
1228
1229         argv_array_pushl(&argv, "fetch", "--append", NULL);
1230         add_options_to_argv(&argv);
1231
1232         for (i = 0; i < list->nr; i++) {
1233                 const char *name = list->items[i].string;
1234                 argv_array_push(&argv, name);
1235                 if (verbosity >= 0)
1236                         printf(_("Fetching %s\n"), name);
1237                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1238                         error(_("Could not fetch %s"), name);
1239                         result = 1;
1240                 }
1241                 argv_array_pop(&argv);
1242         }
1243
1244         argv_array_clear(&argv);
1245         return result;
1246 }
1247
1248 static int fetch_one(struct remote *remote, int argc, const char **argv)
1249 {
1250         static const char **refs = NULL;
1251         struct refspec *refspec;
1252         int ref_nr = 0;
1253         int exit_code;
1254
1255         if (!remote)
1256                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1257                     "remote name from which new revisions should be fetched."));
1258
1259         gtransport = prepare_transport(remote, 1);
1260
1261         if (prune < 0) {
1262                 /* no command line request */
1263                 if (0 <= gtransport->remote->prune)
1264                         prune = gtransport->remote->prune;
1265                 else if (0 <= fetch_prune_config)
1266                         prune = fetch_prune_config;
1267                 else
1268                         prune = PRUNE_BY_DEFAULT;
1269         }
1270
1271         if (argc > 0) {
1272                 int j = 0;
1273                 int i;
1274                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1275                 for (i = 0; i < argc; i++) {
1276                         if (!strcmp(argv[i], "tag")) {
1277                                 i++;
1278                                 if (i >= argc)
1279                                         die(_("You need to specify a tag name."));
1280                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1281                                                     argv[i], argv[i]);
1282                         } else
1283                                 refs[j++] = argv[i];
1284                 }
1285                 refs[j] = NULL;
1286                 ref_nr = j;
1287         }
1288
1289         sigchain_push_common(unlock_pack_on_signal);
1290         atexit(unlock_pack);
1291         refspec = parse_fetch_refspec(ref_nr, refs);
1292         exit_code = do_fetch(gtransport, refspec, ref_nr);
1293         free_refspec(ref_nr, refspec);
1294         transport_disconnect(gtransport);
1295         gtransport = NULL;
1296         return exit_code;
1297 }
1298
1299 int cmd_fetch(int argc, const char **argv, const char *prefix)
1300 {
1301         int i;
1302         struct string_list list = STRING_LIST_INIT_DUP;
1303         struct remote *remote;
1304         int result = 0;
1305         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1306
1307         packet_trace_identity("fetch");
1308
1309         /* Record the command line for the reflog */
1310         strbuf_addstr(&default_rla, "fetch");
1311         for (i = 1; i < argc; i++)
1312                 strbuf_addf(&default_rla, " %s", argv[i]);
1313
1314         git_config(git_fetch_config, NULL);
1315
1316         argc = parse_options(argc, argv, prefix,
1317                              builtin_fetch_options, builtin_fetch_usage, 0);
1318
1319         if (deepen_relative) {
1320                 if (deepen_relative < 0)
1321                         die(_("Negative depth in --deepen is not supported"));
1322                 if (depth)
1323                         die(_("--deepen and --depth are mutually exclusive"));
1324                 depth = xstrfmt("%d", deepen_relative);
1325         }
1326         if (unshallow) {
1327                 if (depth)
1328                         die(_("--depth and --unshallow cannot be used together"));
1329                 else if (!is_repository_shallow())
1330                         die(_("--unshallow on a complete repository does not make sense"));
1331                 else
1332                         depth = xstrfmt("%d", INFINITE_DEPTH);
1333         }
1334
1335         /* no need to be strict, transport_set_option() will validate it again */
1336         if (depth && atoi(depth) < 1)
1337                 die(_("depth %s is not a positive number"), depth);
1338         if (depth || deepen_since || deepen_not.nr)
1339                 deepen = 1;
1340
1341         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1342                 set_config_fetch_recurse_submodules(recurse_submodules_default);
1343                 gitmodules_config();
1344                 git_config(submodule_config, NULL);
1345         }
1346
1347         if (all) {
1348                 if (argc == 1)
1349                         die(_("fetch --all does not take a repository argument"));
1350                 else if (argc > 1)
1351                         die(_("fetch --all does not make sense with refspecs"));
1352                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1353                 result = fetch_multiple(&list);
1354         } else if (argc == 0) {
1355                 /* No arguments -- use default remote */
1356                 remote = remote_get(NULL);
1357                 result = fetch_one(remote, argc, argv);
1358         } else if (multiple) {
1359                 /* All arguments are assumed to be remotes or groups */
1360                 for (i = 0; i < argc; i++)
1361                         if (!add_remote_or_group(argv[i], &list))
1362                                 die(_("No such remote or remote group: %s"), argv[i]);
1363                 result = fetch_multiple(&list);
1364         } else {
1365                 /* Single remote or group */
1366                 (void) add_remote_or_group(argv[0], &list);
1367                 if (list.nr > 1) {
1368                         /* More than one remote */
1369                         if (argc > 1)
1370                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1371                         result = fetch_multiple(&list);
1372                 } else {
1373                         /* Zero or one remotes */
1374                         remote = remote_get(argv[0]);
1375                         result = fetch_one(remote, argc-1, argv+1);
1376                 }
1377         }
1378
1379         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1380                 struct argv_array options = ARGV_ARRAY_INIT;
1381
1382                 add_options_to_argv(&options);
1383                 result = fetch_populated_submodules(&options,
1384                                                     submodule_prefix,
1385                                                     recurse_submodules,
1386                                                     verbosity < 0,
1387                                                     max_children);
1388                 argv_array_clear(&options);
1389         }
1390
1391         string_list_clear(&list, 0);
1392
1393         close_all_packs();
1394
1395         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1396         if (verbosity < 0)
1397                 argv_array_push(&argv_gc_auto, "--quiet");
1398         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1399         argv_array_clear(&argv_gc_auto);
1400
1401         return result;
1402 }