Merge branch 'jk/bug-to-abort'
[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;
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         msg = xstrfmt("%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         free(msg);
453         return 0;
454 fail:
455         ref_transaction_free(transaction);
456         error("%s", err.buf);
457         strbuf_release(&err);
458         free(msg);
459         return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
460                            : STORE_REF_ERROR_OTHER;
461 }
462
463 static int refcol_width = 10;
464 static int compact_format;
465
466 static void adjust_refcol_width(const struct ref *ref)
467 {
468         int max, rlen, llen, len;
469
470         /* uptodate lines are only shown on high verbosity level */
471         if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
472                 return;
473
474         max    = term_columns();
475         rlen   = utf8_strwidth(prettify_refname(ref->name));
476
477         llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));
478
479         /*
480          * rough estimation to see if the output line is too long and
481          * should not be counted (we can't do precise calculation
482          * anyway because we don't know if the error explanation part
483          * will be printed in update_local_ref)
484          */
485         if (compact_format) {
486                 llen = 0;
487                 max = max * 2 / 3;
488         }
489         len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
490         if (len >= max)
491                 return;
492
493         /*
494          * Not precise calculation for compact mode because '*' can
495          * appear on the left hand side of '->' and shrink the column
496          * back.
497          */
498         if (refcol_width < rlen)
499                 refcol_width = rlen;
500 }
501
502 static void prepare_format_display(struct ref *ref_map)
503 {
504         struct ref *rm;
505         const char *format = "full";
506
507         git_config_get_string_const("fetch.output", &format);
508         if (!strcasecmp(format, "full"))
509                 compact_format = 0;
510         else if (!strcasecmp(format, "compact"))
511                 compact_format = 1;
512         else
513                 die(_("configuration fetch.output contains invalid value %s"),
514                     format);
515
516         for (rm = ref_map; rm; rm = rm->next) {
517                 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
518                     !rm->peer_ref ||
519                     !strcmp(rm->name, "HEAD"))
520                         continue;
521
522                 adjust_refcol_width(rm);
523         }
524 }
525
526 static void print_remote_to_local(struct strbuf *display,
527                                   const char *remote, const char *local)
528 {
529         strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
530 }
531
532 static int find_and_replace(struct strbuf *haystack,
533                             const char *needle,
534                             const char *placeholder)
535 {
536         const char *p = strstr(haystack->buf, needle);
537         int plen, nlen;
538
539         if (!p)
540                 return 0;
541
542         if (p > haystack->buf && p[-1] != '/')
543                 return 0;
544
545         plen = strlen(p);
546         nlen = strlen(needle);
547         if (plen > nlen && p[nlen] != '/')
548                 return 0;
549
550         strbuf_splice(haystack, p - haystack->buf, nlen,
551                       placeholder, strlen(placeholder));
552         return 1;
553 }
554
555 static void print_compact(struct strbuf *display,
556                           const char *remote, const char *local)
557 {
558         struct strbuf r = STRBUF_INIT;
559         struct strbuf l = STRBUF_INIT;
560
561         if (!strcmp(remote, local)) {
562                 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
563                 return;
564         }
565
566         strbuf_addstr(&r, remote);
567         strbuf_addstr(&l, local);
568
569         if (!find_and_replace(&r, local, "*"))
570                 find_and_replace(&l, remote, "*");
571         print_remote_to_local(display, r.buf, l.buf);
572
573         strbuf_release(&r);
574         strbuf_release(&l);
575 }
576
577 static void format_display(struct strbuf *display, char code,
578                            const char *summary, const char *error,
579                            const char *remote, const char *local,
580                            int summary_width)
581 {
582         int width = (summary_width + strlen(summary) - gettext_width(summary));
583
584         strbuf_addf(display, "%c %-*s ", code, width, summary);
585         if (!compact_format)
586                 print_remote_to_local(display, remote, local);
587         else
588                 print_compact(display, remote, local);
589         if (error)
590                 strbuf_addf(display, "  (%s)", error);
591 }
592
593 static int update_local_ref(struct ref *ref,
594                             const char *remote,
595                             const struct ref *remote_ref,
596                             struct strbuf *display,
597                             int summary_width)
598 {
599         struct commit *current = NULL, *updated;
600         enum object_type type;
601         struct branch *current_branch = branch_get(NULL);
602         const char *pretty_ref = prettify_refname(ref->name);
603
604         type = sha1_object_info(ref->new_oid.hash, NULL);
605         if (type < 0)
606                 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
607
608         if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
609                 if (verbosity > 0)
610                         format_display(display, '=', _("[up to date]"), NULL,
611                                        remote, pretty_ref, summary_width);
612                 return 0;
613         }
614
615         if (current_branch &&
616             !strcmp(ref->name, current_branch->name) &&
617             !(update_head_ok || is_bare_repository()) &&
618             !is_null_oid(&ref->old_oid)) {
619                 /*
620                  * If this is the head, and it's not okay to update
621                  * the head, and the old value of the head isn't empty...
622                  */
623                 format_display(display, '!', _("[rejected]"),
624                                _("can't fetch in current branch"),
625                                remote, pretty_ref, summary_width);
626                 return 1;
627         }
628
629         if (!is_null_oid(&ref->old_oid) &&
630             starts_with(ref->name, "refs/tags/")) {
631                 int r;
632                 r = s_update_ref("updating tag", ref, 0);
633                 format_display(display, r ? '!' : 't', _("[tag update]"),
634                                r ? _("unable to update local ref") : NULL,
635                                remote, pretty_ref, summary_width);
636                 return r;
637         }
638
639         current = lookup_commit_reference_gently(&ref->old_oid, 1);
640         updated = lookup_commit_reference_gently(&ref->new_oid, 1);
641         if (!current || !updated) {
642                 const char *msg;
643                 const char *what;
644                 int r;
645                 /*
646                  * Nicely describe the new ref we're fetching.
647                  * Base this on the remote's ref name, as it's
648                  * more likely to follow a standard layout.
649                  */
650                 const char *name = remote_ref ? remote_ref->name : "";
651                 if (starts_with(name, "refs/tags/")) {
652                         msg = "storing tag";
653                         what = _("[new tag]");
654                 } else if (starts_with(name, "refs/heads/")) {
655                         msg = "storing head";
656                         what = _("[new branch]");
657                 } else {
658                         msg = "storing ref";
659                         what = _("[new ref]");
660                 }
661
662                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
663                     (recurse_submodules != RECURSE_SUBMODULES_ON))
664                         check_for_new_submodule_commits(&ref->new_oid);
665                 r = s_update_ref(msg, ref, 0);
666                 format_display(display, r ? '!' : '*', what,
667                                r ? _("unable to update local ref") : NULL,
668                                remote, pretty_ref, summary_width);
669                 return r;
670         }
671
672         if (in_merge_bases(current, updated)) {
673                 struct strbuf quickref = STRBUF_INIT;
674                 int r;
675                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
676                 strbuf_addstr(&quickref, "..");
677                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
678                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
679                     (recurse_submodules != RECURSE_SUBMODULES_ON))
680                         check_for_new_submodule_commits(&ref->new_oid);
681                 r = s_update_ref("fast-forward", ref, 1);
682                 format_display(display, r ? '!' : ' ', quickref.buf,
683                                r ? _("unable to update local ref") : NULL,
684                                remote, pretty_ref, summary_width);
685                 strbuf_release(&quickref);
686                 return r;
687         } else if (force || ref->force) {
688                 struct strbuf quickref = STRBUF_INIT;
689                 int r;
690                 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
691                 strbuf_addstr(&quickref, "...");
692                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
693                 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
694                     (recurse_submodules != RECURSE_SUBMODULES_ON))
695                         check_for_new_submodule_commits(&ref->new_oid);
696                 r = s_update_ref("forced-update", ref, 1);
697                 format_display(display, r ? '!' : '+', quickref.buf,
698                                r ? _("unable to update local ref") : _("forced update"),
699                                remote, pretty_ref, summary_width);
700                 strbuf_release(&quickref);
701                 return r;
702         } else {
703                 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
704                                remote, pretty_ref, summary_width);
705                 return 1;
706         }
707 }
708
709 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
710 {
711         struct ref **rm = cb_data;
712         struct ref *ref = *rm;
713
714         while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
715                 ref = ref->next;
716         if (!ref)
717                 return -1; /* end of the list */
718         *rm = ref->next;
719         hashcpy(sha1, ref->old_oid.hash);
720         return 0;
721 }
722
723 static int store_updated_refs(const char *raw_url, const char *remote_name,
724                 struct ref *ref_map)
725 {
726         FILE *fp;
727         struct commit *commit;
728         int url_len, i, rc = 0;
729         struct strbuf note = STRBUF_INIT;
730         const char *what, *kind;
731         struct ref *rm;
732         char *url;
733         const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
734         int want_status;
735         int summary_width = transport_summary_width(ref_map);
736
737         fp = fopen(filename, "a");
738         if (!fp)
739                 return error_errno(_("cannot open %s"), filename);
740
741         if (raw_url)
742                 url = transport_anonymize_url(raw_url);
743         else
744                 url = xstrdup("foreign");
745
746         rm = ref_map;
747         if (check_connected(iterate_ref_map, &rm, NULL)) {
748                 rc = error(_("%s did not send all necessary objects\n"), url);
749                 goto abort;
750         }
751
752         prepare_format_display(ref_map);
753
754         /*
755          * We do a pass for each fetch_head_status type in their enum order, so
756          * merged entries are written before not-for-merge. That lets readers
757          * use FETCH_HEAD as a refname to refer to the ref to be merged.
758          */
759         for (want_status = FETCH_HEAD_MERGE;
760              want_status <= FETCH_HEAD_IGNORE;
761              want_status++) {
762                 for (rm = ref_map; rm; rm = rm->next) {
763                         struct ref *ref = NULL;
764                         const char *merge_status_marker = "";
765
766                         if (rm->status == REF_STATUS_REJECT_SHALLOW) {
767                                 if (want_status == FETCH_HEAD_MERGE)
768                                         warning(_("reject %s because shallow roots are not allowed to be updated"),
769                                                 rm->peer_ref ? rm->peer_ref->name : rm->name);
770                                 continue;
771                         }
772
773                         commit = lookup_commit_reference_gently(&rm->old_oid,
774                                                                 1);
775                         if (!commit)
776                                 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
777
778                         if (rm->fetch_head_status != want_status)
779                                 continue;
780
781                         if (rm->peer_ref) {
782                                 ref = alloc_ref(rm->peer_ref->name);
783                                 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
784                                 oidcpy(&ref->new_oid, &rm->old_oid);
785                                 ref->force = rm->peer_ref->force;
786                         }
787
788
789                         if (!strcmp(rm->name, "HEAD")) {
790                                 kind = "";
791                                 what = "";
792                         }
793                         else if (starts_with(rm->name, "refs/heads/")) {
794                                 kind = "branch";
795                                 what = rm->name + 11;
796                         }
797                         else if (starts_with(rm->name, "refs/tags/")) {
798                                 kind = "tag";
799                                 what = rm->name + 10;
800                         }
801                         else if (starts_with(rm->name, "refs/remotes/")) {
802                                 kind = "remote-tracking branch";
803                                 what = rm->name + 13;
804                         }
805                         else {
806                                 kind = "";
807                                 what = rm->name;
808                         }
809
810                         url_len = strlen(url);
811                         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
812                                 ;
813                         url_len = i + 1;
814                         if (4 < i && !strncmp(".git", url + i - 3, 4))
815                                 url_len = i - 3;
816
817                         strbuf_reset(&note);
818                         if (*what) {
819                                 if (*kind)
820                                         strbuf_addf(&note, "%s ", kind);
821                                 strbuf_addf(&note, "'%s' of ", what);
822                         }
823                         switch (rm->fetch_head_status) {
824                         case FETCH_HEAD_NOT_FOR_MERGE:
825                                 merge_status_marker = "not-for-merge";
826                                 /* fall-through */
827                         case FETCH_HEAD_MERGE:
828                                 fprintf(fp, "%s\t%s\t%s",
829                                         oid_to_hex(&rm->old_oid),
830                                         merge_status_marker,
831                                         note.buf);
832                                 for (i = 0; i < url_len; ++i)
833                                         if ('\n' == url[i])
834                                                 fputs("\\n", fp);
835                                         else
836                                                 fputc(url[i], fp);
837                                 fputc('\n', fp);
838                                 break;
839                         default:
840                                 /* do not write anything to FETCH_HEAD */
841                                 break;
842                         }
843
844                         strbuf_reset(&note);
845                         if (ref) {
846                                 rc |= update_local_ref(ref, what, rm, &note,
847                                                        summary_width);
848                                 free(ref);
849                         } else
850                                 format_display(&note, '*',
851                                                *kind ? kind : "branch", NULL,
852                                                *what ? what : "HEAD",
853                                                "FETCH_HEAD", summary_width);
854                         if (note.len) {
855                                 if (verbosity >= 0 && !shown_url) {
856                                         fprintf(stderr, _("From %.*s\n"),
857                                                         url_len, url);
858                                         shown_url = 1;
859                                 }
860                                 if (verbosity >= 0)
861                                         fprintf(stderr, " %s\n", note.buf);
862                         }
863                 }
864         }
865
866         if (rc & STORE_REF_ERROR_DF_CONFLICT)
867                 error(_("some local refs could not be updated; try running\n"
868                       " 'git remote prune %s' to remove any old, conflicting "
869                       "branches"), remote_name);
870
871  abort:
872         strbuf_release(&note);
873         free(url);
874         fclose(fp);
875         return rc;
876 }
877
878 /*
879  * We would want to bypass the object transfer altogether if
880  * everything we are going to fetch already exists and is connected
881  * locally.
882  */
883 static int quickfetch(struct ref *ref_map)
884 {
885         struct ref *rm = ref_map;
886         struct check_connected_options opt = CHECK_CONNECTED_INIT;
887
888         /*
889          * If we are deepening a shallow clone we already have these
890          * objects reachable.  Running rev-list here will return with
891          * a good (0) exit status and we'll bypass the fetch that we
892          * really need to perform.  Claiming failure now will ensure
893          * we perform the network exchange to deepen our history.
894          */
895         if (deepen)
896                 return -1;
897         opt.quiet = 1;
898         return check_connected(iterate_ref_map, &rm, &opt);
899 }
900
901 static int fetch_refs(struct transport *transport, struct ref *ref_map)
902 {
903         int ret = quickfetch(ref_map);
904         if (ret)
905                 ret = transport_fetch_refs(transport, ref_map);
906         if (!ret)
907                 ret |= store_updated_refs(transport->url,
908                                 transport->remote->name,
909                                 ref_map);
910         transport_unlock_pack(transport);
911         return ret;
912 }
913
914 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
915                 const char *raw_url)
916 {
917         int url_len, i, result = 0;
918         struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
919         char *url;
920         int summary_width = transport_summary_width(stale_refs);
921         const char *dangling_msg = dry_run
922                 ? _("   (%s will become dangling)")
923                 : _("   (%s has become dangling)");
924
925         if (raw_url)
926                 url = transport_anonymize_url(raw_url);
927         else
928                 url = xstrdup("foreign");
929
930         url_len = strlen(url);
931         for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
932                 ;
933
934         url_len = i + 1;
935         if (4 < i && !strncmp(".git", url + i - 3, 4))
936                 url_len = i - 3;
937
938         if (!dry_run) {
939                 struct string_list refnames = STRING_LIST_INIT_NODUP;
940
941                 for (ref = stale_refs; ref; ref = ref->next)
942                         string_list_append(&refnames, ref->name);
943
944                 result = delete_refs(&refnames, 0);
945                 string_list_clear(&refnames, 0);
946         }
947
948         if (verbosity >= 0) {
949                 for (ref = stale_refs; ref; ref = ref->next) {
950                         struct strbuf sb = STRBUF_INIT;
951                         if (!shown_url) {
952                                 fprintf(stderr, _("From %.*s\n"), url_len, url);
953                                 shown_url = 1;
954                         }
955                         format_display(&sb, '-', _("[deleted]"), NULL,
956                                        _("(none)"), prettify_refname(ref->name),
957                                        summary_width);
958                         fprintf(stderr, " %s\n",sb.buf);
959                         strbuf_release(&sb);
960                         warn_dangling_symref(stderr, dangling_msg, ref->name);
961                 }
962         }
963
964         free(url);
965         free_refs(stale_refs);
966         return result;
967 }
968
969 static void check_not_current_branch(struct ref *ref_map)
970 {
971         struct branch *current_branch = branch_get(NULL);
972
973         if (is_bare_repository() || !current_branch)
974                 return;
975
976         for (; ref_map; ref_map = ref_map->next)
977                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
978                                         ref_map->peer_ref->name))
979                         die(_("Refusing to fetch into current branch %s "
980                             "of non-bare repository"), current_branch->refname);
981 }
982
983 static int truncate_fetch_head(void)
984 {
985         const char *filename = git_path_fetch_head();
986         FILE *fp = fopen_for_writing(filename);
987
988         if (!fp)
989                 return error_errno(_("cannot open %s"), filename);
990         fclose(fp);
991         return 0;
992 }
993
994 static void set_option(struct transport *transport, const char *name, const char *value)
995 {
996         int r = transport_set_option(transport, name, value);
997         if (r < 0)
998                 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
999                     name, value, transport->url);
1000         if (r > 0)
1001                 warning(_("Option \"%s\" is ignored for %s\n"),
1002                         name, transport->url);
1003 }
1004
1005 static struct transport *prepare_transport(struct remote *remote, int deepen)
1006 {
1007         struct transport *transport;
1008         transport = transport_get(remote, NULL);
1009         transport_set_verbosity(transport, verbosity, progress);
1010         transport->family = family;
1011         if (upload_pack)
1012                 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1013         if (keep)
1014                 set_option(transport, TRANS_OPT_KEEP, "yes");
1015         if (depth)
1016                 set_option(transport, TRANS_OPT_DEPTH, depth);
1017         if (deepen && deepen_since)
1018                 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1019         if (deepen && deepen_not.nr)
1020                 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1021                            (const char *)&deepen_not);
1022         if (deepen_relative)
1023                 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1024         if (update_shallow)
1025                 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1026         return transport;
1027 }
1028
1029 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1030 {
1031         int cannot_reuse;
1032
1033         /*
1034          * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1035          * when remote helper is used (setting it to an empty string
1036          * is not unsetting). We could extend the remote helper
1037          * protocol for that, but for now, just force a new connection
1038          * without deepen-since. Similar story for deepen-not.
1039          */
1040         cannot_reuse = transport->cannot_reuse ||
1041                 deepen_since || deepen_not.nr;
1042         if (cannot_reuse) {
1043                 gsecondary = prepare_transport(transport->remote, 0);
1044                 transport = gsecondary;
1045         }
1046
1047         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1048         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1049         transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1050         fetch_refs(transport, ref_map);
1051
1052         if (gsecondary) {
1053                 transport_disconnect(gsecondary);
1054                 gsecondary = NULL;
1055         }
1056 }
1057
1058 static int do_fetch(struct transport *transport,
1059                     struct refspec *refs, int ref_count)
1060 {
1061         struct string_list existing_refs = STRING_LIST_INIT_DUP;
1062         struct ref *ref_map;
1063         struct ref *rm;
1064         int autotags = (transport->remote->fetch_tags == 1);
1065         int retcode = 0;
1066
1067         for_each_ref(add_existing, &existing_refs);
1068
1069         if (tags == TAGS_DEFAULT) {
1070                 if (transport->remote->fetch_tags == 2)
1071                         tags = TAGS_SET;
1072                 if (transport->remote->fetch_tags == -1)
1073                         tags = TAGS_UNSET;
1074         }
1075
1076         if (!transport->get_refs_list || !transport->fetch)
1077                 die(_("Don't know how to fetch from %s"), transport->url);
1078
1079         /* if not appending, truncate FETCH_HEAD */
1080         if (!append && !dry_run) {
1081                 retcode = truncate_fetch_head();
1082                 if (retcode)
1083                         goto cleanup;
1084         }
1085
1086         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1087         if (!update_head_ok)
1088                 check_not_current_branch(ref_map);
1089
1090         for (rm = ref_map; rm; rm = rm->next) {
1091                 if (rm->peer_ref) {
1092                         struct string_list_item *peer_item =
1093                                 string_list_lookup(&existing_refs,
1094                                                    rm->peer_ref->name);
1095                         if (peer_item) {
1096                                 struct object_id *old_oid = peer_item->util;
1097                                 oidcpy(&rm->peer_ref->old_oid, old_oid);
1098                         }
1099                 }
1100         }
1101
1102         if (tags == TAGS_DEFAULT && autotags)
1103                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1104         if (prune) {
1105                 /*
1106                  * We only prune based on refspecs specified
1107                  * explicitly (via command line or configuration); we
1108                  * don't care whether --tags was specified.
1109                  */
1110                 if (ref_count) {
1111                         prune_refs(refs, ref_count, ref_map, transport->url);
1112                 } else {
1113                         prune_refs(transport->remote->fetch,
1114                                    transport->remote->fetch_refspec_nr,
1115                                    ref_map,
1116                                    transport->url);
1117                 }
1118         }
1119         if (fetch_refs(transport, ref_map)) {
1120                 free_refs(ref_map);
1121                 retcode = 1;
1122                 goto cleanup;
1123         }
1124         free_refs(ref_map);
1125
1126         /* if neither --no-tags nor --tags was specified, do automated tag
1127          * following ... */
1128         if (tags == TAGS_DEFAULT && autotags) {
1129                 struct ref **tail = &ref_map;
1130                 ref_map = NULL;
1131                 find_non_local_tags(transport, &ref_map, &tail);
1132                 if (ref_map)
1133                         backfill_tags(transport, ref_map);
1134                 free_refs(ref_map);
1135         }
1136
1137  cleanup:
1138         string_list_clear(&existing_refs, 1);
1139         return retcode;
1140 }
1141
1142 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1143 {
1144         struct string_list *list = priv;
1145         if (!remote->skip_default_update)
1146                 string_list_append(list, remote->name);
1147         return 0;
1148 }
1149
1150 struct remote_group_data {
1151         const char *name;
1152         struct string_list *list;
1153 };
1154
1155 static int get_remote_group(const char *key, const char *value, void *priv)
1156 {
1157         struct remote_group_data *g = priv;
1158
1159         if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1160                 /* split list by white space */
1161                 while (*value) {
1162                         size_t wordlen = strcspn(value, " \t\n");
1163
1164                         if (wordlen >= 1)
1165                                 string_list_append_nodup(g->list,
1166                                                    xstrndup(value, wordlen));
1167                         value += wordlen + (value[wordlen] != '\0');
1168                 }
1169         }
1170
1171         return 0;
1172 }
1173
1174 static int add_remote_or_group(const char *name, struct string_list *list)
1175 {
1176         int prev_nr = list->nr;
1177         struct remote_group_data g;
1178         g.name = name; g.list = list;
1179
1180         git_config(get_remote_group, &g);
1181         if (list->nr == prev_nr) {
1182                 struct remote *remote = remote_get(name);
1183                 if (!remote_is_configured(remote, 0))
1184                         return 0;
1185                 string_list_append(list, remote->name);
1186         }
1187         return 1;
1188 }
1189
1190 static void add_options_to_argv(struct argv_array *argv)
1191 {
1192         if (dry_run)
1193                 argv_array_push(argv, "--dry-run");
1194         if (prune != -1)
1195                 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1196         if (update_head_ok)
1197                 argv_array_push(argv, "--update-head-ok");
1198         if (force)
1199                 argv_array_push(argv, "--force");
1200         if (keep)
1201                 argv_array_push(argv, "--keep");
1202         if (recurse_submodules == RECURSE_SUBMODULES_ON)
1203                 argv_array_push(argv, "--recurse-submodules");
1204         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1205                 argv_array_push(argv, "--recurse-submodules=on-demand");
1206         if (tags == TAGS_SET)
1207                 argv_array_push(argv, "--tags");
1208         else if (tags == TAGS_UNSET)
1209                 argv_array_push(argv, "--no-tags");
1210         if (verbosity >= 2)
1211                 argv_array_push(argv, "-v");
1212         if (verbosity >= 1)
1213                 argv_array_push(argv, "-v");
1214         else if (verbosity < 0)
1215                 argv_array_push(argv, "-q");
1216
1217 }
1218
1219 static int fetch_multiple(struct string_list *list)
1220 {
1221         int i, result = 0;
1222         struct argv_array argv = ARGV_ARRAY_INIT;
1223
1224         if (!append && !dry_run) {
1225                 int errcode = truncate_fetch_head();
1226                 if (errcode)
1227                         return errcode;
1228         }
1229
1230         argv_array_pushl(&argv, "fetch", "--append", NULL);
1231         add_options_to_argv(&argv);
1232
1233         for (i = 0; i < list->nr; i++) {
1234                 const char *name = list->items[i].string;
1235                 argv_array_push(&argv, name);
1236                 if (verbosity >= 0)
1237                         printf(_("Fetching %s\n"), name);
1238                 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1239                         error(_("Could not fetch %s"), name);
1240                         result = 1;
1241                 }
1242                 argv_array_pop(&argv);
1243         }
1244
1245         argv_array_clear(&argv);
1246         return result;
1247 }
1248
1249 static int fetch_one(struct remote *remote, int argc, const char **argv)
1250 {
1251         static const char **refs = NULL;
1252         struct refspec *refspec;
1253         int ref_nr = 0;
1254         int exit_code;
1255
1256         if (!remote)
1257                 die(_("No remote repository specified.  Please, specify either a URL or a\n"
1258                     "remote name from which new revisions should be fetched."));
1259
1260         gtransport = prepare_transport(remote, 1);
1261
1262         if (prune < 0) {
1263                 /* no command line request */
1264                 if (0 <= gtransport->remote->prune)
1265                         prune = gtransport->remote->prune;
1266                 else if (0 <= fetch_prune_config)
1267                         prune = fetch_prune_config;
1268                 else
1269                         prune = PRUNE_BY_DEFAULT;
1270         }
1271
1272         if (argc > 0) {
1273                 int j = 0;
1274                 int i;
1275                 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1276                 for (i = 0; i < argc; i++) {
1277                         if (!strcmp(argv[i], "tag")) {
1278                                 i++;
1279                                 if (i >= argc)
1280                                         die(_("You need to specify a tag name."));
1281                                 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1282                                                     argv[i], argv[i]);
1283                         } else
1284                                 refs[j++] = argv[i];
1285                 }
1286                 refs[j] = NULL;
1287                 ref_nr = j;
1288         }
1289
1290         sigchain_push_common(unlock_pack_on_signal);
1291         atexit(unlock_pack);
1292         refspec = parse_fetch_refspec(ref_nr, refs);
1293         exit_code = do_fetch(gtransport, refspec, ref_nr);
1294         free_refspec(ref_nr, refspec);
1295         transport_disconnect(gtransport);
1296         gtransport = NULL;
1297         return exit_code;
1298 }
1299
1300 int cmd_fetch(int argc, const char **argv, const char *prefix)
1301 {
1302         int i;
1303         struct string_list list = STRING_LIST_INIT_DUP;
1304         struct remote *remote;
1305         int result = 0;
1306         struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1307
1308         packet_trace_identity("fetch");
1309
1310         /* Record the command line for the reflog */
1311         strbuf_addstr(&default_rla, "fetch");
1312         for (i = 1; i < argc; i++)
1313                 strbuf_addf(&default_rla, " %s", argv[i]);
1314
1315         git_config(git_fetch_config, NULL);
1316
1317         argc = parse_options(argc, argv, prefix,
1318                              builtin_fetch_options, builtin_fetch_usage, 0);
1319
1320         if (deepen_relative) {
1321                 if (deepen_relative < 0)
1322                         die(_("Negative depth in --deepen is not supported"));
1323                 if (depth)
1324                         die(_("--deepen and --depth are mutually exclusive"));
1325                 depth = xstrfmt("%d", deepen_relative);
1326         }
1327         if (unshallow) {
1328                 if (depth)
1329                         die(_("--depth and --unshallow cannot be used together"));
1330                 else if (!is_repository_shallow())
1331                         die(_("--unshallow on a complete repository does not make sense"));
1332                 else
1333                         depth = xstrfmt("%d", INFINITE_DEPTH);
1334         }
1335
1336         /* no need to be strict, transport_set_option() will validate it again */
1337         if (depth && atoi(depth) < 1)
1338                 die(_("depth %s is not a positive number"), depth);
1339         if (depth || deepen_since || deepen_not.nr)
1340                 deepen = 1;
1341
1342         if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1343                 if (recurse_submodules_default) {
1344                         int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1345                         set_config_fetch_recurse_submodules(arg);
1346                 }
1347                 gitmodules_config();
1348                 git_config(submodule_config, NULL);
1349         }
1350
1351         if (all) {
1352                 if (argc == 1)
1353                         die(_("fetch --all does not take a repository argument"));
1354                 else if (argc > 1)
1355                         die(_("fetch --all does not make sense with refspecs"));
1356                 (void) for_each_remote(get_one_remote_for_fetch, &list);
1357                 result = fetch_multiple(&list);
1358         } else if (argc == 0) {
1359                 /* No arguments -- use default remote */
1360                 remote = remote_get(NULL);
1361                 result = fetch_one(remote, argc, argv);
1362         } else if (multiple) {
1363                 /* All arguments are assumed to be remotes or groups */
1364                 for (i = 0; i < argc; i++)
1365                         if (!add_remote_or_group(argv[i], &list))
1366                                 die(_("No such remote or remote group: %s"), argv[i]);
1367                 result = fetch_multiple(&list);
1368         } else {
1369                 /* Single remote or group */
1370                 (void) add_remote_or_group(argv[0], &list);
1371                 if (list.nr > 1) {
1372                         /* More than one remote */
1373                         if (argc > 1)
1374                                 die(_("Fetching a group and specifying refspecs does not make sense"));
1375                         result = fetch_multiple(&list);
1376                 } else {
1377                         /* Zero or one remotes */
1378                         remote = remote_get(argv[0]);
1379                         result = fetch_one(remote, argc-1, argv+1);
1380                 }
1381         }
1382
1383         if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1384                 struct argv_array options = ARGV_ARRAY_INIT;
1385
1386                 add_options_to_argv(&options);
1387                 result = fetch_populated_submodules(&options,
1388                                                     submodule_prefix,
1389                                                     recurse_submodules,
1390                                                     verbosity < 0,
1391                                                     max_children);
1392                 argv_array_clear(&options);
1393         }
1394
1395         string_list_clear(&list, 0);
1396
1397         close_all_packs();
1398
1399         argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1400         if (verbosity < 0)
1401                 argv_array_push(&argv_gc_auto, "--quiet");
1402         run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1403         argv_array_clear(&argv_gc_auto);
1404
1405         return result;
1406 }