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