Merge branch 'sb/t4005-modernize'
[git] / builtin / fetch.c
1 /*
2  * "git fetch"
3  */
4 #include "cache.h"
5 #include "refs.h"
6 #include "commit.h"
7 #include "builtin.h"
8 #include "string-list.h"
9 #include "remote.h"
10 #include "transport.h"
11 #include "run-command.h"
12 #include "parse-options.h"
13 #include "sigchain.h"
14 #include "submodule-config.h"
15 #include "submodule.h"
16 #include "connected.h"
17 #include "argv-array.h"
18 #include "utf8.h"
19
20 static const char * const builtin_fetch_usage[] = {
21         N_("git fetch [<options>] [<repository> [<refspec>...]]"),
22         N_("git fetch [<options>] <group>"),
23         N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
24         N_("git fetch --all [<options>]"),
25         NULL
26 };
27
28 enum {
29         TAGS_UNSET = 0,
30         TAGS_DEFAULT = 1,
31         TAGS_SET = 2
32 };
33
34 static int fetch_prune_config = -1; /* unspecified */
35 static int prune = -1; /* unspecified */
36 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
37
38 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
39 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
40 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
41 static int max_children = -1;
42 static enum transport_family family;
43 static const char *depth;
44 static const char *deepen_since;
45 static const char *upload_pack;
46 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
47 static struct strbuf default_rla = STRBUF_INIT;
48 static struct transport *gtransport;
49 static struct transport *gsecondary;
50 static const char *submodule_prefix = "";
51 static const char *recurse_submodules_default;
52 static int shown_url = 0;
53 static int refmap_alloc, refmap_nr;
54 static const char **refmap_array;
55
56 static int option_parse_recurse_submodules(const struct option *opt,
57                                    const char *arg, int unset)
58 {
59         if (unset) {
60                 recurse_submodules = RECURSE_SUBMODULES_OFF;
61         } else {
62                 if (arg)
63                         recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
64                 else
65                         recurse_submodules = RECURSE_SUBMODULES_ON;
66         }
67         return 0;
68 }
69
70 static int git_fetch_config(const char *k, const char *v, void *cb)
71 {
72         if (!strcmp(k, "fetch.prune")) {
73                 fetch_prune_config = git_config_bool(k, v);
74                 return 0;
75         }
76
77         if (!strcmp(k, "submodule.recurse")) {
78                 int r = git_config_bool(k, v) ?
79                         RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
80                 recurse_submodules = r;
81         }
82
83         return git_default_config(k, v, cb);
84 }
85
86 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
87 {
88         ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
89
90         /*
91          * "git fetch --refmap='' origin foo"
92          * can be used to tell the command not to store anywhere
93          */
94         if (*arg)
95                 refmap_array[refmap_nr++] = arg;
96         return 0;
97 }
98
99 static struct option builtin_fetch_options[] = {
100         OPT__VERBOSITY(&verbosity),
101         OPT_BOOL(0, "all", &all,
102                  N_("fetch from all remotes")),
103         OPT_BOOL('a', "append", &append,
104                  N_("append to .git/FETCH_HEAD instead of overwriting")),
105         OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
106                    N_("path to upload pack on remote end")),
107         OPT__FORCE(&force, N_("force overwrite of local branch")),
108         OPT_BOOL('m', "multiple", &multiple,
109                  N_("fetch from multiple remotes")),
110         OPT_SET_INT('t', "tags", &tags,
111                     N_("fetch all tags and associated objects"), TAGS_SET),
112         OPT_SET_INT('n', NULL, &tags,
113                     N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
114         OPT_INTEGER('j', "jobs", &max_children,
115                     N_("number of submodules fetched in parallel")),
116         OPT_BOOL('p', "prune", &prune,
117                  N_("prune remote-tracking branches no longer on remote")),
118         { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
119                     N_("control recursive fetching of submodules"),
120                     PARSE_OPT_OPTARG, option_parse_recurse_submodules },
121         OPT_BOOL(0, "dry-run", &dry_run,
122                  N_("dry run")),
123         OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
124         OPT_BOOL('u', "update-head-ok", &update_head_ok,
125                     N_("allow updating of HEAD ref")),
126         OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
127         OPT_STRING(0, "depth", &depth, N_("depth"),
128                    N_("deepen history of shallow clone")),
129         OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
130                    N_("deepen history of shallow repository based on time")),
131         OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
132                         N_("deepen history of shallow clone, excluding rev")),
133         OPT_INTEGER(0, "deepen", &deepen_relative,
134                     N_("deepen history of shallow clone")),
135         { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
136                    N_("convert to a complete repository"),
137                    PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
138         { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
139                    N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
140         { OPTION_STRING, 0, "recurse-submodules-default",
141                    &recurse_submodules_default, NULL,
142                    N_("default mode for recursion"), PARSE_OPT_HIDDEN },
143         OPT_BOOL(0, "update-shallow", &update_shallow,
144                  N_("accept refs that update .git/shallow")),
145         { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
146           N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
147         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
148                         TRANSPORT_FAMILY_IPV4),
149         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
150                         TRANSPORT_FAMILY_IPV6),
151         OPT_END()
152 };
153
154 static void unlock_pack(void)
155 {
156         if (gtransport)
157                 transport_unlock_pack(gtransport);
158         if (gsecondary)
159                 transport_unlock_pack(gsecondary);
160 }
161
162 static void unlock_pack_on_signal(int signo)
163 {
164         unlock_pack();
165         sigchain_pop(signo);
166         raise(signo);
167 }
168
169 static void add_merge_config(struct ref **head,
170                            const struct ref *remote_refs,
171                            struct branch *branch,
172                            struct ref ***tail)
173 {
174         int i;
175
176         for (i = 0; i < branch->merge_nr; i++) {
177                 struct ref *rm, **old_tail = *tail;
178                 struct refspec refspec;
179
180                 for (rm = *head; rm; rm = rm->next) {
181                         if (branch_merge_matches(branch, i, rm->name)) {
182                                 rm->fetch_head_status = FETCH_HEAD_MERGE;
183                                 break;
184                         }
185                 }
186                 if (rm)
187                         continue;
188
189                 /*
190                  * Not fetched to a remote-tracking branch?  We need to fetch
191                  * it anyway to allow this branch's "branch.$name.merge"
192                  * to be honored by 'git pull', but we do not have to
193                  * fail if branch.$name.merge is misconfigured to point
194                  * at a nonexisting branch.  If we were indeed called by
195                  * 'git pull', it will notice the misconfiguration because
196                  * there is no entry in the resulting FETCH_HEAD marked
197                  * for merging.
198                  */
199                 memset(&refspec, 0, sizeof(refspec));
200                 refspec.src = branch->merge[i]->src;
201                 get_fetch_map(remote_refs, &refspec, tail, 1);
202                 for (rm = *old_tail; rm; rm = rm->next)
203                         rm->fetch_head_status = FETCH_HEAD_MERGE;
204         }
205 }
206
207 static int add_existing(const char *refname, const struct object_id *oid,
208                         int flag, void *cbdata)
209 {
210         struct string_list *list = (struct string_list *)cbdata;
211         struct string_list_item *item = string_list_insert(list, refname);
212         struct object_id *old_oid = xmalloc(sizeof(*old_oid));
213
214         oidcpy(old_oid, oid);
215         item->util = old_oid;
216         return 0;
217 }
218
219 static int will_fetch(struct ref **head, const unsigned char *sha1)
220 {
221         struct ref *rm = *head;
222         while (rm) {
223                 if (!hashcmp(rm->old_oid.hash, sha1))
224                         return 1;
225                 rm = rm->next;
226         }
227         return 0;
228 }
229
230 static void find_non_local_tags(struct transport *transport,
231                         struct ref **head,
232                         struct ref ***tail)
233 {
234         struct string_list existing_refs = STRING_LIST_INIT_DUP;
235         struct string_list remote_refs = STRING_LIST_INIT_NODUP;
236         const struct ref *ref;
237         struct string_list_item *item = NULL;
238
239         for_each_ref(add_existing, &existing_refs);
240         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
241                 if (!starts_with(ref->name, "refs/tags/"))
242                         continue;
243
244                 /*
245                  * The peeled ref always follows the matching base
246                  * ref, so if we see a peeled ref that we don't want
247                  * to fetch then we can mark the ref entry in the list
248                  * as one to ignore by setting util to NULL.
249                  */
250                 if (ends_with(ref->name, "^{}")) {
251                         if (item &&
252                             !has_object_file_with_flags(&ref->old_oid, HAS_SHA1_QUICK) &&
253                             !will_fetch(head, ref->old_oid.hash) &&
254                             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
255                             !will_fetch(head, item->util))
256                                 item->util = NULL;
257                         item = NULL;
258                         continue;
259                 }
260
261                 /*
262                  * If item is non-NULL here, then we previously saw a
263                  * ref not followed by a peeled reference, so we need
264                  * to check if it is a lightweight tag that we want to
265                  * fetch.
266                  */
267                 if (item &&
268                     !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
269                     !will_fetch(head, item->util))
270                         item->util = NULL;
271
272                 item = NULL;
273
274                 /* skip duplicates and refs that we already have */
275                 if (string_list_has_string(&remote_refs, ref->name) ||
276                     string_list_has_string(&existing_refs, ref->name))
277                         continue;
278
279                 item = string_list_insert(&remote_refs, ref->name);
280                 item->util = (void *)&ref->old_oid;
281         }
282         string_list_clear(&existing_refs, 1);
283
284         /*
285          * We may have a final lightweight tag that needs to be
286          * checked to see if it needs fetching.
287          */
288         if (item &&
289             !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
290             !will_fetch(head, item->util))
291                 item->util = NULL;
292
293         /*
294          * For all the tags in the remote_refs string list,
295          * add them to the list of refs to be fetched
296          */
297         for_each_string_list_item(item, &remote_refs) {
298                 /* Unless we have already decided to ignore this item... */
299                 if (item->util)
300                 {
301                         struct ref *rm = alloc_ref(item->string);
302                         rm->peer_ref = alloc_ref(item->string);
303                         oidcpy(&rm->old_oid, item->util);
304                         **tail = rm;
305                         *tail = &rm->next;
306                 }
307         }
308
309         string_list_clear(&remote_refs, 0);
310 }
311
312 static struct ref *get_ref_map(struct transport *transport,
313                                struct refspec *refspecs, int refspec_count,
314                                int tags, int *autotags)
315 {
316         int i;
317         struct ref *rm;
318         struct ref *ref_map = NULL;
319         struct ref **tail = &ref_map;
320
321         /* opportunistically-updated references: */
322         struct ref *orefs = NULL, **oref_tail = &orefs;
323
324         const struct ref *remote_refs = transport_get_remote_refs(transport);
325
326         if (refspec_count) {
327                 struct refspec *fetch_refspec;
328                 int fetch_refspec_nr;
329
330                 for (i = 0; i < refspec_count; i++) {
331                         get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
332                         if (refspecs[i].dst && refspecs[i].dst[0])
333                                 *autotags = 1;
334                 }
335                 /* Merge everything on the command line (but not --tags) */
336                 for (rm = ref_map; rm; rm = rm->next)
337                         rm->fetch_head_status = FETCH_HEAD_MERGE;
338
339                 /*
340                  * For any refs that we happen to be fetching via
341                  * command-line arguments, the destination ref might
342                  * have been missing or have been different than the
343                  * remote-tracking ref that would be derived from the
344                  * configured refspec.  In these cases, we want to
345                  * take the opportunity to update their configured
346                  * remote-tracking reference.  However, we do not want
347                  * to mention these entries in FETCH_HEAD at all, as
348                  * they would simply be duplicates of existing
349                  * entries, so we set them FETCH_HEAD_IGNORE below.
350                  *
351                  * We compute these entries now, based only on the
352                  * refspecs specified on the command line.  But we add
353                  * them to the list following the refspecs resulting
354                  * from the tags option so that one of the latter,
355                  * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
356                  * by ref_remove_duplicates() in favor of one of these
357                  * opportunistic entries with FETCH_HEAD_IGNORE.
358                  */
359                 if (refmap_array) {
360                         fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
361                         fetch_refspec_nr = refmap_nr;
362                 } else {
363                         fetch_refspec = transport->remote->fetch;
364                         fetch_refspec_nr = transport->remote->fetch_refspec_nr;
365                 }
366
367                 for (i = 0; i < fetch_refspec_nr; i++)
368                         get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
369         } else if (refmap_array) {
370                 die("--refmap option is only meaningful with command-line refspec(s).");
371         } else {
372                 /* Use the defaults */
373                 struct remote *remote = transport->remote;
374                 struct branch *branch = branch_get(NULL);
375                 int has_merge = branch_has_merge_config(branch);
376                 if (remote &&
377                     (remote->fetch_refspec_nr ||
378                      /* Note: has_merge implies non-NULL branch->remote_name */
379                      (has_merge && !strcmp(branch->remote_name, remote->name)))) {
380                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
381                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
382                                 if (remote->fetch[i].dst &&
383                                     remote->fetch[i].dst[0])
384                                         *autotags = 1;
385                                 if (!i && !has_merge && ref_map &&
386                                     !remote->fetch[0].pattern)
387                                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
388                         }
389                         /*
390                          * if the remote we're fetching from is the same
391                          * as given in branch.<name>.remote, we add the
392                          * ref given in branch.<name>.merge, too.
393                          *
394                          * Note: has_merge implies non-NULL branch->remote_name
395                          */
396                         if (has_merge &&
397                             !strcmp(branch->remote_name, remote->name))
398                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
399                 } else {
400                         ref_map = get_remote_ref(remote_refs, "HEAD");
401                         if (!ref_map)
402                                 die(_("Couldn't find remote ref HEAD"));
403                         ref_map->fetch_head_status = FETCH_HEAD_MERGE;
404                         tail = &ref_map->next;
405                 }
406         }
407
408         if (tags == TAGS_SET)
409                 /* also fetch all tags */
410                 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
411         else if (tags == TAGS_DEFAULT && *autotags)
412                 find_non_local_tags(transport, &ref_map, &tail);
413
414         /* Now append any refs to be updated opportunistically: */
415         *tail = orefs;
416         for (rm = orefs; rm; rm = rm->next) {
417                 rm->fetch_head_status = FETCH_HEAD_IGNORE;
418                 tail = &rm->next;
419         }
420
421         return ref_remove_duplicates(ref_map);
422 }
423
424 #define STORE_REF_ERROR_OTHER 1
425 #define STORE_REF_ERROR_DF_CONFLICT 2
426
427 static int s_update_ref(const char *action,
428                         struct ref *ref,
429                         int check_old)
430 {
431         char *msg;
432         char *rla = getenv("GIT_REFLOG_ACTION");
433         struct ref_transaction *transaction;
434         struct strbuf err = STRBUF_INIT;
435         int ret, df_conflict = 0;
436
437         if (dry_run)
438                 return 0;
439         if (!rla)
440                 rla = default_rla.buf;
441         msg = xstrfmt("%s: %s", rla, action);
442
443         transaction = ref_transaction_begin(&err);
444         if (!transaction ||
445             ref_transaction_update(transaction, ref->name,
446                                    ref->new_oid.hash,
447                                    check_old ? ref->old_oid.hash : NULL,
448                                    0, msg, &err))
449                 goto fail;
450
451         ret = ref_transaction_commit(transaction, &err);
452         if (ret) {
453                 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
454                 goto fail;
455         }
456
457         ref_transaction_free(transaction);
458         strbuf_release(&err);
459         free(msg);
460         return 0;
461 fail:
462         ref_transaction_free(transaction);
463         error("%s", err.buf);
464         strbuf_release(&err);
465         free(msg);
466         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
467                            : STORE_REF_ERROR_OTHER;
468 }
469
470 static int refcol_width = 10;
471 static int compact_format;
472
473 static void adjust_refcol_width(const struct ref *ref)
474 {
475         int max, rlen, llen, len;
476
477         /* uptodate lines are only shown on high verbosity level */
478         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
479                 return;
480
481         max    = term_columns();
482         rlen   = utf8_strwidth(prettify_refname(ref->name));
483
484         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
485
486         /*
487          * rough estimation to see if the output line is too long and
488          * should not be counted (we can't do precise calculation
489          * anyway because we don't know if the error explanation part
490          * will be printed in update_local_ref)
491          */
492         if (compact_format) {
493                 llen = 0;
494                 max = max * 2 / 3;
495         }
496         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
497         if (len >= max)
498                 return;
499
500         /*
501          * Not precise calculation for compact mode because '*' can
502          * appear on the left hand side of '->' and shrink the column
503          * back.
504          */
505         if (refcol_width < rlen)
506                 refcol_width = rlen;
507 }
508
509 static void prepare_format_display(struct ref *ref_map)
510 {
511         struct ref *rm;
512         const char *format = "full";
513
514         git_config_get_string_const("fetch.output", &format);
515         if (!strcasecmp(format, "full"))
516                 compact_format = 0;
517         else if (!strcasecmp(format, "compact"))
518                 compact_format = 1;
519         else
520                 die(_("configuration fetch.output contains invalid value %s"),
521                     format);
522
523         for (rm = ref_map; rm; rm = rm->next) {
524                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
525                     !rm->peer_ref ||
526                     !strcmp(rm->name, "HEAD"))
527                         continue;
528
529                 adjust_refcol_width(rm);
530         }
531 }
532
533 static void print_remote_to_local(struct strbuf *display,
534                                   const char *remote, const char *local)
535 {
536         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
537 }
538
539 static int find_and_replace(struct strbuf *haystack,
540                             const char *needle,
541                             const char *placeholder)
542 {
543         const char *p = strstr(haystack->buf, needle);
544         int plen, nlen;
545
546         if (!p)
547                 return 0;
548
549         if (p > haystack->buf && p[-1] != '/')
550                 return 0;
551
552         plen = strlen(p);
553         nlen = strlen(needle);
554         if (plen > nlen && p[nlen] != '/')
555                 return 0;
556
557         strbuf_splice(haystack, p - haystack->buf, nlen,
558                       placeholder, strlen(placeholder));
559         return 1;
560 }
561
562 static void print_compact(struct strbuf *display,
563                           const char *remote, const char *local)
564 {
565         struct strbuf r = STRBUF_INIT;
566         struct strbuf l = STRBUF_INIT;
567
568         if (!strcmp(remote, local)) {
569                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
570                 return;
571         }
572
573         strbuf_addstr(&r, remote);
574         strbuf_addstr(&l, local);
575
576         if (!find_and_replace(&r, local, "*"))
577                 find_and_replace(&l, remote, "*");
578         print_remote_to_local(display, r.buf, l.buf);
579
580         strbuf_release(&r);
581         strbuf_release(&l);
582 }
583
584 static void format_display(struct strbuf *display, char code,
585                            const char *summary, const char *error,
586                            const char *remote, const char *local,
587                            int summary_width)
588 {
589         int width = (summary_width + strlen(summary) - gettext_width(summary));
590
591         strbuf_addf(display, "%c %-*s ", code, width, summary);
592         if (!compact_format)
593                 print_remote_to_local(display, remote, local);
594         else
595                 print_compact(display, remote, local);
596         if (error)
597                 strbuf_addf(display, "  (%s)", error);
598 }
599
600 static int update_local_ref(struct ref *ref,
601                             const char *remote,
602                             const struct ref *remote_ref,
603                             struct strbuf *display,
604                             int summary_width)
605 {
606         struct commit *current = NULL, *updated;
607         enum object_type type;
608         struct branch *current_branch = branch_get(NULL);
609         const char *pretty_ref = prettify_refname(ref->name);
610
611         type = sha1_object_info(ref->new_oid.hash, NULL);
612         if (type < 0)
613                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
614
615         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
616                 if (verbosity > 0)
617                         format_display(display, '=', _("[up to date]"), NULL,
618                                        remote, pretty_ref, summary_width);
619                 return 0;
620         }
621
622         if (current_branch &&
623             !strcmp(ref->name, current_branch->name) &&
624             !(update_head_ok || is_bare_repository()) &&
625             !is_null_oid(&ref->old_oid)) {
626                 /*
627                  * If this is the head, and it's not okay to update
628                  * the head, and the old value of the head isn't empty...
629                  */
630                 format_display(display, '!', _("[rejected]"),
631                                _("can't fetch in current branch"),
632                                remote, pretty_ref, summary_width);
633                 return 1;
634         }
635
636         if (!is_null_oid(&ref->old_oid) &&
637             starts_with(ref->name, "refs/tags/")) {
638                 int r;
639                 r = s_update_ref("updating tag", ref, 0);
640                 format_display(display, r ? '!' : 't', _("[tag update]"),
641                                r ? _("unable to update local ref") : NULL,
642                                remote, pretty_ref, summary_width);
643                 return r;
644         }
645
646         current = lookup_commit_reference_gently(&ref->old_oid, 1);
647         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
648         if (!current || !updated) {
649                 const char *msg;
650                 const char *what;
651                 int r;
652                 /*
653                  * Nicely describe the new ref we're fetching.
654                  * Base this on the remote's ref name, as it's
655                  * more likely to follow a standard layout.
656                  */
657                 const char *name = remote_ref ? remote_ref->name : "";
658                 if (starts_with(name, "refs/tags/")) {
659                         msg = "storing tag";
660                         what = _("[new tag]");
661                 } else if (starts_with(name, "refs/heads/")) {
662                         msg = "storing head";
663                         what = _("[new branch]");
664                 } else {
665                         msg = "storing ref";
666                         what = _("[new ref]");
667                 }
668
669                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
670                     (recurse_submodules != RECURSE_SUBMODULES_ON))
671                         check_for_new_submodule_commits(&ref->new_oid);
672                 r = s_update_ref(msg, ref, 0);
673                 format_display(display, r ? '!' : '*', what,
674                                r ? _("unable to update local ref") : NULL,
675                                remote, pretty_ref, summary_width);
676                 return r;
677         }
678
679         if (in_merge_bases(current, updated)) {
680                 struct strbuf quickref = STRBUF_INIT;
681                 int r;
682                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
683                 strbuf_addstr(&quickref, "..");
684                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
685                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
686                     (recurse_submodules != RECURSE_SUBMODULES_ON))
687                         check_for_new_submodule_commits(&ref->new_oid);
688                 r = s_update_ref("fast-forward", ref, 1);
689                 format_display(display, r ? '!' : ' ', quickref.buf,
690                                r ? _("unable to update local ref") : NULL,
691                                remote, pretty_ref, summary_width);
692                 strbuf_release(&quickref);
693                 return r;
694         } else if (force || ref->force) {
695                 struct strbuf quickref = STRBUF_INIT;
696                 int r;
697                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
698                 strbuf_addstr(&quickref, "...");
699                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
700                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
701                     (recurse_submodules != RECURSE_SUBMODULES_ON))
702                         check_for_new_submodule_commits(&ref->new_oid);
703                 r = s_update_ref("forced-update", ref, 1);
704                 format_display(display, r ? '!' : '+', quickref.buf,
705                                r ? _("unable to update local ref") : _("forced update"),
706                                remote, pretty_ref, summary_width);
707                 strbuf_release(&quickref);
708                 return r;
709         } else {
710                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
711                                remote, pretty_ref, summary_width);
712                 return 1;
713         }
714 }
715
716 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
717 {
718         struct ref **rm = cb_data;
719         struct ref *ref = *rm;
720
721         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
722                 ref = ref->next;
723         if (!ref)
724                 return -1; /* end of the list */
725         *rm = ref->next;
726         hashcpy(sha1, ref->old_oid.hash);
727         return 0;
728 }
729
730 static int store_updated_refs(const char *raw_url, const char *remote_name,
731                 struct ref *ref_map)
732 {
733         FILE *fp;
734         struct commit *commit;
735         int url_len, i, rc = 0;
736         struct strbuf note = STRBUF_INIT;
737         const char *what, *kind;
738         struct ref *rm;
739         char *url;
740         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
741         int want_status;
742         int summary_width = transport_summary_width(ref_map);
743
744         fp = fopen(filename, "a");
745         if (!fp)
746                 return error_errno(_("cannot open %s"), filename);
747
748         if (raw_url)
749                 url = transport_anonymize_url(raw_url);
750         else
751                 url = xstrdup("foreign");
752
753         rm = ref_map;
754         if (check_connected(iterate_ref_map, &rm, NULL)) {
755                 rc = error(_("%s did not send all necessary objects\n"), url);
756                 goto abort;
757         }
758
759         prepare_format_display(ref_map);
760
761         /*
762          * We do a pass for each fetch_head_status type in their enum order, so
763          * merged entries are written before not-for-merge. That lets readers
764          * use FETCH_HEAD as a refname to refer to the ref to be merged.
765          */
766         for (want_status = FETCH_HEAD_MERGE;
767              want_status <= FETCH_HEAD_IGNORE;
768              want_status++) {
769                 for (rm = ref_map; rm; rm = rm->next) {
770                         struct ref *ref = NULL;
771                         const char *merge_status_marker = "";
772
773                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
774                                 if (want_status == FETCH_HEAD_MERGE)
775                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
776                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
777                                 continue;
778                         }
779
780                         commit = lookup_commit_reference_gently(&rm->old_oid,
781                                                                 1);
782                         if (!commit)
783                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
784
785                         if (rm->fetch_head_status != want_status)
786                                 continue;
787
788                         if (rm->peer_ref) {
789                                 ref = alloc_ref(rm->peer_ref->name);
790                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
791                                 oidcpy(&ref->new_oid, &rm->old_oid);
792                                 ref->force = rm->peer_ref->force;
793                         }
794
795
796                         if (!strcmp(rm->name, "HEAD")) {
797                                 kind = "";
798                                 what = "";
799                         }
800                         else if (starts_with(rm->name, "refs/heads/")) {
801                                 kind = "branch";
802                                 what = rm->name + 11;
803                         }
804                         else if (starts_with(rm->name, "refs/tags/")) {
805                                 kind = "tag";
806                                 what = rm->name + 10;
807                         }
808                         else if (starts_with(rm->name, "refs/remotes/")) {
809                                 kind = "remote-tracking branch";
810                                 what = rm->name + 13;
811                         }
812                         else {
813                                 kind = "";
814                                 what = rm->name;
815                         }
816
817                         url_len = strlen(url);
818                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
819                                 ;
820                         url_len = i + 1;
821                         if (4 < i && !strncmp(".git", url + i - 3, 4))
822                                 url_len = i - 3;
823
824                         strbuf_reset(&note);
825                         if (*what) {
826                                 if (*kind)
827                                         strbuf_addf(&note, "%s ", kind);
828                                 strbuf_addf(&note, "'%s' of ", what);
829                         }
830                         switch (rm->fetch_head_status) {
831                         case FETCH_HEAD_NOT_FOR_MERGE:
832                                 merge_status_marker = "not-for-merge";
833                                 /* fall-through */
834                         case FETCH_HEAD_MERGE:
835                                 fprintf(fp, "%s\t%s\t%s",
836                                         oid_to_hex(&rm->old_oid),
837                                         merge_status_marker,
838                                         note.buf);
839                                 for (i = 0; i < url_len; ++i)
840                                         if ('\n' == url[i])
841                                                 fputs("\\n", fp);
842                                         else
843                                                 fputc(url[i], fp);
844                                 fputc('\n', fp);
845                                 break;
846                         default:
847                                 /* do not write anything to FETCH_HEAD */
848                                 break;
849                         }
850
851                         strbuf_reset(&note);
852                         if (ref) {
853                                 rc |= update_local_ref(ref, what, rm, &note,
854                                                        summary_width);
855                                 free(ref);
856                         } else
857                                 format_display(&note, '*',
858                                                *kind ? kind : "branch", NULL,
859                                                *what ? what : "HEAD",
860                                                "FETCH_HEAD", summary_width);
861                         if (note.len) {
862                                 if (verbosity >= 0 && !shown_url) {
863                                         fprintf(stderr, _("From %.*s\n"),
864                                                         url_len, url);
865                                         shown_url = 1;
866                                 }
867                                 if (verbosity >= 0)
868                                         fprintf(stderr, " %s\n", note.buf);
869                         }
870                 }
871         }
872
873         if (rc & STORE_REF_ERROR_DF_CONFLICT)
874                 error(_("some local refs could not be updated; try running\n"
875                       " 'git remote prune %s' to remove any old, conflicting "
876                       "branches"), remote_name);
877
878  abort:
879         strbuf_release(&note);
880         free(url);
881         fclose(fp);
882         return rc;
883 }
884
885 /*
886  * We would want to bypass the object transfer altogether if
887  * everything we are going to fetch already exists and is connected
888  * locally.
889  */
890 static int quickfetch(struct ref *ref_map)
891 {
892         struct ref *rm = ref_map;
893         struct check_connected_options opt = CHECK_CONNECTED_INIT;
894
895         /*
896          * If we are deepening a shallow clone we already have these
897          * objects reachable.  Running rev-list here will return with
898          * a good (0) exit status and we'll bypass the fetch that we
899          * really need to perform.  Claiming failure now will ensure
900          * we perform the network exchange to deepen our history.
901          */
902         if (deepen)
903                 return -1;
904         opt.quiet = 1;
905         return check_connected(iterate_ref_map, &rm, &opt);
906 }
907
908 static int fetch_refs(struct transport *transport, struct ref *ref_map)
909 {
910         int ret = quickfetch(ref_map);
911         if (ret)
912                 ret = transport_fetch_refs(transport, ref_map);
913         if (!ret)
914                 ret |= store_updated_refs(transport->url,
915                                 transport->remote->name,
916                                 ref_map);
917         transport_unlock_pack(transport);
918         return ret;
919 }
920
921 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
922                 const char *raw_url)
923 {
924         int url_len, i, result = 0;
925         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
926         char *url;
927         int summary_width = transport_summary_width(stale_refs);
928         const char *dangling_msg = dry_run
929                 ? _("   (%s will become dangling)")
930                 : _("   (%s has become dangling)");
931
932         if (raw_url)
933                 url = transport_anonymize_url(raw_url);
934         else
935                 url = xstrdup("foreign");
936
937         url_len = strlen(url);
938         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
939                 ;
940
941         url_len = i + 1;
942         if (4 < i && !strncmp(".git", url + i - 3, 4))
943                 url_len = i - 3;
944
945         if (!dry_run) {
946                 struct string_list refnames = STRING_LIST_INIT_NODUP;
947
948                 for (ref = stale_refs; ref; ref = ref->next)
949                         string_list_append(&refnames, ref->name);
950
951                 result = delete_refs("fetch: prune", &refnames, 0);
952                 string_list_clear(&refnames, 0);
953         }
954
955         if (verbosity >= 0) {
956                 for (ref = stale_refs; ref; ref = ref->next) {
957                         struct strbuf sb = STRBUF_INIT;
958                         if (!shown_url) {
959                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
960                                 shown_url = 1;
961                         }
962                         format_display(&sb, '-', _("[deleted]"), NULL,
963                                        _("(none)"), prettify_refname(ref->name),
964                                        summary_width);
965                         fprintf(stderr, " %s\n",sb.buf);
966                         strbuf_release(&sb);
967                         warn_dangling_symref(stderr, dangling_msg, ref->name);
968                 }
969         }
970
971         free(url);
972         free_refs(stale_refs);
973         return result;
974 }
975
976 static void check_not_current_branch(struct ref *ref_map)
977 {
978         struct branch *current_branch = branch_get(NULL);
979
980         if (is_bare_repository() || !current_branch)
981                 return;
982
983         for (; ref_map; ref_map = ref_map->next)
984                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
985                                         ref_map->peer_ref->name))
986                         die(_("Refusing to fetch into current branch %s "
987                             "of non-bare repository"), current_branch->refname);
988 }
989
990 static int truncate_fetch_head(void)
991 {
992         const char *filename = git_path_fetch_head();
993         FILE *fp = fopen_for_writing(filename);
994
995         if (!fp)
996                 return error_errno(_("cannot open %s"), filename);
997         fclose(fp);
998         return 0;
999 }
1000
1001 static void set_option(struct transport *transport, const char *name, const char *value)
1002 {
1003         int r = transport_set_option(transport, name, value);
1004         if (r < 0)
1005                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1006                     name, value, transport->url);
1007         if (r > 0)
1008                 warning(_("Option \"%s\" is ignored for %s\n"),
1009                         name, transport->url);
1010 }
1011
1012 static struct transport *prepare_transport(struct remote *remote, int deepen)
1013 {
1014         struct transport *transport;
1015         transport = transport_get(remote, NULL);
1016         transport_set_verbosity(transport, verbosity, progress);
1017         transport->family = family;
1018         if (upload_pack)
1019                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1020         if (keep)
1021                 set_option(transport, TRANS_OPT_KEEP, "yes");
1022         if (depth)
1023                 set_option(transport, TRANS_OPT_DEPTH, depth);
1024         if (deepen && deepen_since)
1025                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1026         if (deepen && deepen_not.nr)
1027                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1028                            (const char *)&deepen_not);
1029         if (deepen_relative)
1030                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1031         if (update_shallow)
1032                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1033         return transport;
1034 }
1035
1036 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1037 {
1038         int cannot_reuse;
1039
1040         /*
1041          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1042          * when remote helper is used (setting it to an empty string
1043          * is not unsetting). We could extend the remote helper
1044          * protocol for that, but for now, just force a new connection
1045          * without deepen-since. Similar story for deepen-not.
1046          */
1047         cannot_reuse = transport->cannot_reuse ||
1048                 deepen_since || deepen_not.nr;
1049         if (cannot_reuse) {
1050                 gsecondary = prepare_transport(transport->remote, 0);
1051                 transport = gsecondary;
1052         }
1053
1054         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1055         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1056         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1057         fetch_refs(transport, ref_map);
1058
1059         if (gsecondary) {
1060                 transport_disconnect(gsecondary);
1061                 gsecondary = NULL;
1062         }
1063 }
1064
1065 static int do_fetch(struct transport *transport,
1066                     struct refspec *refs, int ref_count)
1067 {
1068         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1069         struct ref *ref_map;
1070         struct ref *rm;
1071         int autotags = (transport->remote->fetch_tags == 1);
1072         int retcode = 0;
1073
1074         for_each_ref(add_existing, &existing_refs);
1075
1076         if (tags == TAGS_DEFAULT) {
1077                 if (transport->remote->fetch_tags == 2)
1078                         tags = TAGS_SET;
1079                 if (transport->remote->fetch_tags == -1)
1080                         tags = TAGS_UNSET;
1081         }
1082
1083         if (!transport->get_refs_list || !transport->fetch)
1084                 die(_("Don't know how to fetch from %s"), transport->url);
1085
1086         /* if not appending, truncate FETCH_HEAD */
1087         if (!append && !dry_run) {
1088                 retcode = truncate_fetch_head();
1089                 if (retcode)
1090                         goto cleanup;
1091         }
1092
1093         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1094         if (!update_head_ok)
1095                 check_not_current_branch(ref_map);
1096
1097         for (rm = ref_map; rm; rm = rm->next) {
1098                 if (rm->peer_ref) {
1099                         struct string_list_item *peer_item =
1100                                 string_list_lookup(&existing_refs,
1101                                                    rm->peer_ref->name);
1102                         if (peer_item) {
1103                                 struct object_id *old_oid = peer_item->util;
1104                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1105                         }
1106                 }
1107         }
1108
1109         if (tags == TAGS_DEFAULT && autotags)
1110                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1111         if (prune) {
1112                 /*
1113                  * We only prune based on refspecs specified
1114                  * explicitly (via command line or configuration); we
1115                  * don't care whether --tags was specified.
1116                  */
1117                 if (ref_count) {
1118                         prune_refs(refs, ref_count, ref_map, transport->url);
1119                 } else {
1120                         prune_refs(transport->remote->fetch,
1121                                    transport->remote->fetch_refspec_nr,
1122                                    ref_map,
1123                                    transport->url);
1124                 }
1125         }
1126         if (fetch_refs(transport, ref_map)) {
1127                 free_refs(ref_map);
1128                 retcode = 1;
1129                 goto cleanup;
1130         }
1131         free_refs(ref_map);
1132
1133         /* if neither --no-tags nor --tags was specified, do automated tag
1134          * following ... */
1135         if (tags == TAGS_DEFAULT && autotags) {
1136                 struct ref **tail = &ref_map;
1137                 ref_map = NULL;
1138                 find_non_local_tags(transport, &ref_map, &tail);
1139                 if (ref_map)
1140                         backfill_tags(transport, ref_map);
1141                 free_refs(ref_map);
1142         }
1143
1144  cleanup:
1145         string_list_clear(&existing_refs, 1);
1146         return retcode;
1147 }
1148
1149 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1150 {
1151         struct string_list *list = priv;
1152         if (!remote->skip_default_update)
1153                 string_list_append(list, remote->name);
1154         return 0;
1155 }
1156
1157 struct remote_group_data {
1158         const char *name;
1159         struct string_list *list;
1160 };
1161
1162 static int get_remote_group(const char *key, const char *value, void *priv)
1163 {
1164         struct remote_group_data *g = priv;
1165
1166         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1167                 /* split list by white space */
1168                 while (*value) {
1169                         size_t wordlen = strcspn(value, " \t\n");
1170
1171                         if (wordlen >= 1)
1172                                 string_list_append_nodup(g->list,
1173                                                    xstrndup(value, wordlen));
1174                         value += wordlen + (value[wordlen] != '\0');
1175                 }
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int add_remote_or_group(const char *name, struct string_list *list)
1182 {
1183         int prev_nr = list->nr;
1184         struct remote_group_data g;
1185         g.name = name; g.list = list;
1186
1187         git_config(get_remote_group, &g);
1188         if (list->nr == prev_nr) {
1189                 struct remote *remote = remote_get(name);
1190                 if (!remote_is_configured(remote, 0))
1191                         return 0;
1192                 string_list_append(list, remote->name);
1193         }
1194         return 1;
1195 }
1196
1197 static void add_options_to_argv(struct argv_array *argv)
1198 {
1199         if (dry_run)
1200                 argv_array_push(argv, "--dry-run");
1201         if (prune != -1)
1202                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1203         if (update_head_ok)
1204                 argv_array_push(argv, "--update-head-ok");
1205         if (force)
1206                 argv_array_push(argv, "--force");
1207         if (keep)
1208                 argv_array_push(argv, "--keep");
1209         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1210                 argv_array_push(argv, "--recurse-submodules");
1211         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1212                 argv_array_push(argv, "--recurse-submodules=on-demand");
1213         if (tags == TAGS_SET)
1214                 argv_array_push(argv, "--tags");
1215         else if (tags == TAGS_UNSET)
1216                 argv_array_push(argv, "--no-tags");
1217         if (verbosity >= 2)
1218                 argv_array_push(argv, "-v");
1219         if (verbosity >= 1)
1220                 argv_array_push(argv, "-v");
1221         else if (verbosity < 0)
1222                 argv_array_push(argv, "-q");
1223
1224 }
1225
1226 static int fetch_multiple(struct string_list *list)
1227 {
1228         int i, result = 0;
1229         struct argv_array argv = ARGV_ARRAY_INIT;
1230
1231         if (!append && !dry_run) {
1232                 int errcode = truncate_fetch_head();
1233                 if (errcode)
1234                         return errcode;
1235         }
1236
1237         argv_array_pushl(&argv, "fetch", "--append", NULL);
1238         add_options_to_argv(&argv);
1239
1240         for (i = 0; i < list->nr; i++) {
1241                 const char *name = list->items[i].string;
1242                 argv_array_push(&argv, name);
1243                 if (verbosity >= 0)
1244                         printf(_("Fetching %s\n"), name);
1245                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1246                         error(_("Could not fetch %s"), name);
1247                         result = 1;
1248                 }
1249                 argv_array_pop(&argv);
1250         }
1251
1252         argv_array_clear(&argv);
1253         return result;
1254 }
1255
1256 static int fetch_one(struct remote *remote, int argc, const char **argv)
1257 {
1258         static const char **refs = NULL;
1259         struct refspec *refspec;
1260         int ref_nr = 0;
1261         int exit_code;
1262
1263         if (!remote)
1264                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1265                     "remote name from which new revisions should be fetched."));
1266
1267         gtransport = prepare_transport(remote, 1);
1268
1269         if (prune < 0) {
1270                 /* no command line request */
1271                 if (0 <= gtransport->remote->prune)
1272                         prune = gtransport->remote->prune;
1273                 else if (0 <= fetch_prune_config)
1274                         prune = fetch_prune_config;
1275                 else
1276                         prune = PRUNE_BY_DEFAULT;
1277         }
1278
1279         if (argc > 0) {
1280                 int j = 0;
1281                 int i;
1282                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1283                 for (i = 0; i < argc; i++) {
1284                         if (!strcmp(argv[i], "tag")) {
1285                                 i++;
1286                                 if (i >= argc)
1287                                         die(_("You need to specify a tag name."));
1288                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1289                                                     argv[i], argv[i]);
1290                         } else
1291                                 refs[j++] = argv[i];
1292                 }
1293                 refs[j] = NULL;
1294                 ref_nr = j;
1295         }
1296
1297         sigchain_push_common(unlock_pack_on_signal);
1298         atexit(unlock_pack);
1299         refspec = parse_fetch_refspec(ref_nr, refs);
1300         exit_code = do_fetch(gtransport, refspec, ref_nr);
1301         free_refspec(ref_nr, refspec);
1302         transport_disconnect(gtransport);
1303         gtransport = NULL;
1304         return exit_code;
1305 }
1306
1307 int cmd_fetch(int argc, const char **argv, const char *prefix)
1308 {
1309         int i;
1310         struct string_list list = STRING_LIST_INIT_DUP;
1311         struct remote *remote;
1312         int result = 0;
1313         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1314
1315         packet_trace_identity("fetch");
1316
1317         /* Record the command line for the reflog */
1318         strbuf_addstr(&default_rla, "fetch");
1319         for (i = 1; i < argc; i++)
1320                 strbuf_addf(&default_rla, " %s", argv[i]);
1321
1322         git_config(git_fetch_config, NULL);
1323
1324         argc = parse_options(argc, argv, prefix,
1325                              builtin_fetch_options, builtin_fetch_usage, 0);
1326
1327         if (deepen_relative) {
1328                 if (deepen_relative < 0)
1329                         die(_("Negative depth in --deepen is not supported"));
1330                 if (depth)
1331                         die(_("--deepen and --depth are mutually exclusive"));
1332                 depth = xstrfmt("%d", deepen_relative);
1333         }
1334         if (unshallow) {
1335                 if (depth)
1336                         die(_("--depth and --unshallow cannot be used together"));
1337                 else if (!is_repository_shallow())
1338                         die(_("--unshallow on a complete repository does not make sense"));
1339                 else
1340                         depth = xstrfmt("%d", INFINITE_DEPTH);
1341         }
1342
1343         /* no need to be strict, transport_set_option() will validate it again */
1344         if (depth && atoi(depth) < 1)
1345                 die(_("depth %s is not a positive number"), depth);
1346         if (depth || deepen_since || deepen_not.nr)
1347                 deepen = 1;
1348
1349         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1350                 if (recurse_submodules_default) {
1351                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1352                         set_config_fetch_recurse_submodules(arg);
1353                 }
1354                 gitmodules_config();
1355                 git_config(submodule_config, NULL);
1356         }
1357
1358         if (all) {
1359                 if (argc == 1)
1360                         die(_("fetch --all does not take a repository argument"));
1361                 else if (argc > 1)
1362                         die(_("fetch --all does not make sense with refspecs"));
1363                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1364                 result = fetch_multiple(&list);
1365         } else if (argc == 0) {
1366                 /* No arguments -- use default remote */
1367                 remote = remote_get(NULL);
1368                 result = fetch_one(remote, argc, argv);
1369         } else if (multiple) {
1370                 /* All arguments are assumed to be remotes or groups */
1371                 for (i = 0; i < argc; i++)
1372                         if (!add_remote_or_group(argv[i], &list))
1373                                 die(_("No such remote or remote group: %s"), argv[i]);
1374                 result = fetch_multiple(&list);
1375         } else {
1376                 /* Single remote or group */
1377                 (void) add_remote_or_group(argv[0], &list);
1378                 if (list.nr > 1) {
1379                         /* More than one remote */
1380                         if (argc > 1)
1381                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1382                         result = fetch_multiple(&list);
1383                 } else {
1384                         /* Zero or one remotes */
1385                         remote = remote_get(argv[0]);
1386                         result = fetch_one(remote, argc-1, argv+1);
1387                 }
1388         }
1389
1390         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1391                 struct argv_array options = ARGV_ARRAY_INIT;
1392
1393                 add_options_to_argv(&options);
1394                 result = fetch_populated_submodules(&options,
1395                                                     submodule_prefix,
1396                                                     recurse_submodules,
1397                                                     verbosity < 0,
1398                                                     max_children);
1399                 argv_array_clear(&options);
1400         }
1401
1402         string_list_clear(&list, 0);
1403
1404         close_all_packs();
1405
1406         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1407         if (verbosity < 0)
1408                 argv_array_push(&argv_gc_auto, "--quiet");
1409         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1410         argv_array_clear(&argv_gc_auto);
1411
1412         return result;
1413 }