French translation: copy -> copie.
[git/dscho.git] / builtin / fetch.c
blob4b5a89839b66f201bda42f06cabdf781d44f0192
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 "transport.h"
15 #include "submodule.h"
16 #include "connected.h"
17 #include "argv-array.h"
19 static const char * const builtin_fetch_usage[] = {
20 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
21 N_("git fetch [<options>] <group>"),
22 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
23 N_("git fetch --all [<options>]"),
24 NULL
27 enum {
28 TAGS_UNSET = 0,
29 TAGS_DEFAULT = 1,
30 TAGS_SET = 2
33 static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
34 static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
35 static int tags = TAGS_DEFAULT;
36 static const char *depth;
37 static const char *upload_pack;
38 static struct strbuf default_rla = STRBUF_INIT;
39 static struct transport *transport;
40 static const char *submodule_prefix = "";
41 static const char *recurse_submodules_default;
43 static int option_parse_recurse_submodules(const struct option *opt,
44 const char *arg, int unset)
46 if (unset) {
47 recurse_submodules = RECURSE_SUBMODULES_OFF;
48 } else {
49 if (arg)
50 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
51 else
52 recurse_submodules = RECURSE_SUBMODULES_ON;
54 return 0;
57 static struct option builtin_fetch_options[] = {
58 OPT__VERBOSITY(&verbosity),
59 OPT_BOOLEAN(0, "all", &all,
60 N_("fetch from all remotes")),
61 OPT_BOOLEAN('a', "append", &append,
62 N_("append to .git/FETCH_HEAD instead of overwriting")),
63 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
64 N_("path to upload pack on remote end")),
65 OPT__FORCE(&force, N_("force overwrite of local branch")),
66 OPT_BOOLEAN('m', "multiple", &multiple,
67 N_("fetch from multiple remotes")),
68 OPT_SET_INT('t', "tags", &tags,
69 N_("fetch all tags and associated objects"), TAGS_SET),
70 OPT_SET_INT('n', NULL, &tags,
71 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
72 OPT_BOOLEAN('p', "prune", &prune,
73 N_("prune remote-tracking branches no longer on remote")),
74 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
75 N_("control recursive fetching of submodules"),
76 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
77 OPT_BOOLEAN(0, "dry-run", &dry_run,
78 N_("dry run")),
79 OPT_BOOLEAN('k', "keep", &keep, N_("keep downloaded pack")),
80 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
81 N_("allow updating of HEAD ref")),
82 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
83 OPT_STRING(0, "depth", &depth, N_("depth"),
84 N_("deepen history of shallow clone")),
85 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
86 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
87 { OPTION_STRING, 0, "recurse-submodules-default",
88 &recurse_submodules_default, NULL,
89 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
90 OPT_END()
93 static void unlock_pack(void)
95 if (transport)
96 transport_unlock_pack(transport);
99 static void unlock_pack_on_signal(int signo)
101 unlock_pack();
102 sigchain_pop(signo);
103 raise(signo);
106 static void add_merge_config(struct ref **head,
107 const struct ref *remote_refs,
108 struct branch *branch,
109 struct ref ***tail)
111 int i;
113 for (i = 0; i < branch->merge_nr; i++) {
114 struct ref *rm, **old_tail = *tail;
115 struct refspec refspec;
117 for (rm = *head; rm; rm = rm->next) {
118 if (branch_merge_matches(branch, i, rm->name)) {
119 rm->merge = 1;
120 break;
123 if (rm)
124 continue;
127 * Not fetched to a remote-tracking branch? We need to fetch
128 * it anyway to allow this branch's "branch.$name.merge"
129 * to be honored by 'git pull', but we do not have to
130 * fail if branch.$name.merge is misconfigured to point
131 * at a nonexisting branch. If we were indeed called by
132 * 'git pull', it will notice the misconfiguration because
133 * there is no entry in the resulting FETCH_HEAD marked
134 * for merging.
136 memset(&refspec, 0, sizeof(refspec));
137 refspec.src = branch->merge[i]->src;
138 get_fetch_map(remote_refs, &refspec, tail, 1);
139 for (rm = *old_tail; rm; rm = rm->next)
140 rm->merge = 1;
144 static void find_non_local_tags(struct transport *transport,
145 struct ref **head,
146 struct ref ***tail);
148 static struct ref *get_ref_map(struct transport *transport,
149 struct refspec *refs, int ref_count, int tags,
150 int *autotags)
152 int i;
153 struct ref *rm;
154 struct ref *ref_map = NULL;
155 struct ref **tail = &ref_map;
157 const struct ref *remote_refs = transport_get_remote_refs(transport);
159 if (ref_count || tags == TAGS_SET) {
160 for (i = 0; i < ref_count; i++) {
161 get_fetch_map(remote_refs, &refs[i], &tail, 0);
162 if (refs[i].dst && refs[i].dst[0])
163 *autotags = 1;
165 /* Merge everything on the command line, but not --tags */
166 for (rm = ref_map; rm; rm = rm->next)
167 rm->merge = 1;
168 if (tags == TAGS_SET)
169 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
170 } else {
171 /* Use the defaults */
172 struct remote *remote = transport->remote;
173 struct branch *branch = branch_get(NULL);
174 int has_merge = branch_has_merge_config(branch);
175 if (remote &&
176 (remote->fetch_refspec_nr ||
177 /* Note: has_merge implies non-NULL branch->remote_name */
178 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
179 for (i = 0; i < remote->fetch_refspec_nr; i++) {
180 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
181 if (remote->fetch[i].dst &&
182 remote->fetch[i].dst[0])
183 *autotags = 1;
184 if (!i && !has_merge && ref_map &&
185 !remote->fetch[0].pattern)
186 ref_map->merge = 1;
189 * if the remote we're fetching from is the same
190 * as given in branch.<name>.remote, we add the
191 * ref given in branch.<name>.merge, too.
193 * Note: has_merge implies non-NULL branch->remote_name
195 if (has_merge &&
196 !strcmp(branch->remote_name, remote->name))
197 add_merge_config(&ref_map, remote_refs, branch, &tail);
198 } else {
199 ref_map = get_remote_ref(remote_refs, "HEAD");
200 if (!ref_map)
201 die(_("Couldn't find remote ref HEAD"));
202 ref_map->merge = 1;
203 tail = &ref_map->next;
206 if (tags == TAGS_DEFAULT && *autotags)
207 find_non_local_tags(transport, &ref_map, &tail);
208 ref_remove_duplicates(ref_map);
210 return ref_map;
213 #define STORE_REF_ERROR_OTHER 1
214 #define STORE_REF_ERROR_DF_CONFLICT 2
216 static int s_update_ref(const char *action,
217 struct ref *ref,
218 int check_old)
220 char msg[1024];
221 char *rla = getenv("GIT_REFLOG_ACTION");
222 static struct ref_lock *lock;
224 if (dry_run)
225 return 0;
226 if (!rla)
227 rla = default_rla.buf;
228 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
229 lock = lock_any_ref_for_update(ref->name,
230 check_old ? ref->old_sha1 : NULL, 0);
231 if (!lock)
232 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
233 STORE_REF_ERROR_OTHER;
234 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
235 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
236 STORE_REF_ERROR_OTHER;
237 return 0;
240 #define REFCOL_WIDTH 10
242 static int update_local_ref(struct ref *ref,
243 const char *remote,
244 const struct ref *remote_ref,
245 struct strbuf *display)
247 struct commit *current = NULL, *updated;
248 enum object_type type;
249 struct branch *current_branch = branch_get(NULL);
250 const char *pretty_ref = prettify_refname(ref->name);
252 type = sha1_object_info(ref->new_sha1, NULL);
253 if (type < 0)
254 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
256 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
257 if (verbosity > 0)
258 strbuf_addf(display, "= %-*s %-*s -> %s",
259 TRANSPORT_SUMMARY(_("[up to date]")),
260 REFCOL_WIDTH, remote, pretty_ref);
261 return 0;
264 if (current_branch &&
265 !strcmp(ref->name, current_branch->name) &&
266 !(update_head_ok || is_bare_repository()) &&
267 !is_null_sha1(ref->old_sha1)) {
269 * If this is the head, and it's not okay to update
270 * the head, and the old value of the head isn't empty...
272 strbuf_addf(display,
273 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
274 TRANSPORT_SUMMARY(_("[rejected]")),
275 REFCOL_WIDTH, remote, pretty_ref);
276 return 1;
279 if (!is_null_sha1(ref->old_sha1) &&
280 !prefixcmp(ref->name, "refs/tags/")) {
281 int r;
282 r = s_update_ref("updating tag", ref, 0);
283 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
284 r ? '!' : '-',
285 TRANSPORT_SUMMARY(_("[tag update]")),
286 REFCOL_WIDTH, remote, pretty_ref,
287 r ? _(" (unable to update local ref)") : "");
288 return r;
291 current = lookup_commit_reference_gently(ref->old_sha1, 1);
292 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
293 if (!current || !updated) {
294 const char *msg;
295 const char *what;
296 int r;
298 * Nicely describe the new ref we're fetching.
299 * Base this on the remote's ref name, as it's
300 * more likely to follow a standard layout.
302 const char *name = remote_ref ? remote_ref->name : "";
303 if (!prefixcmp(name, "refs/tags/")) {
304 msg = "storing tag";
305 what = _("[new tag]");
306 } else if (!prefixcmp(name, "refs/heads/")) {
307 msg = "storing head";
308 what = _("[new branch]");
309 } else {
310 msg = "storing ref";
311 what = _("[new ref]");
314 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
315 (recurse_submodules != RECURSE_SUBMODULES_ON))
316 check_for_new_submodule_commits(ref->new_sha1);
317 r = s_update_ref(msg, ref, 0);
318 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
319 r ? '!' : '*',
320 TRANSPORT_SUMMARY(what),
321 REFCOL_WIDTH, remote, pretty_ref,
322 r ? _(" (unable to update local ref)") : "");
323 return r;
326 if (in_merge_bases(current, updated)) {
327 char quickref[83];
328 int r;
329 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
330 strcat(quickref, "..");
331 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
332 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
333 (recurse_submodules != RECURSE_SUBMODULES_ON))
334 check_for_new_submodule_commits(ref->new_sha1);
335 r = s_update_ref("fast-forward", ref, 1);
336 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
337 r ? '!' : ' ',
338 TRANSPORT_SUMMARY_WIDTH, quickref,
339 REFCOL_WIDTH, remote, pretty_ref,
340 r ? _(" (unable to update local ref)") : "");
341 return r;
342 } else if (force || ref->force) {
343 char quickref[84];
344 int r;
345 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
346 strcat(quickref, "...");
347 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
348 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
349 (recurse_submodules != RECURSE_SUBMODULES_ON))
350 check_for_new_submodule_commits(ref->new_sha1);
351 r = s_update_ref("forced-update", ref, 1);
352 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
353 r ? '!' : '+',
354 TRANSPORT_SUMMARY_WIDTH, quickref,
355 REFCOL_WIDTH, remote, pretty_ref,
356 r ? _("unable to update local ref") : _("forced update"));
357 return r;
358 } else {
359 strbuf_addf(display, "! %-*s %-*s -> %s %s",
360 TRANSPORT_SUMMARY(_("[rejected]")),
361 REFCOL_WIDTH, remote, pretty_ref,
362 _("(non-fast-forward)"));
363 return 1;
367 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
369 struct ref **rm = cb_data;
370 struct ref *ref = *rm;
372 if (!ref)
373 return -1; /* end of the list */
374 *rm = ref->next;
375 hashcpy(sha1, ref->old_sha1);
376 return 0;
379 static int store_updated_refs(const char *raw_url, const char *remote_name,
380 struct ref *ref_map)
382 FILE *fp;
383 struct commit *commit;
384 int url_len, i, shown_url = 0, rc = 0;
385 struct strbuf note = STRBUF_INIT;
386 const char *what, *kind;
387 struct ref *rm;
388 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
389 int want_merge;
391 fp = fopen(filename, "a");
392 if (!fp)
393 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
395 if (raw_url)
396 url = transport_anonymize_url(raw_url);
397 else
398 url = xstrdup("foreign");
400 rm = ref_map;
401 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
402 rc = error(_("%s did not send all necessary objects\n"), url);
403 goto abort;
407 * The first pass writes objects to be merged and then the
408 * second pass writes the rest, in order to allow using
409 * FETCH_HEAD as a refname to refer to the ref to be merged.
411 for (want_merge = 1; 0 <= want_merge; want_merge--) {
412 for (rm = ref_map; rm; rm = rm->next) {
413 struct ref *ref = NULL;
415 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
416 if (!commit)
417 rm->merge = 0;
419 if (rm->merge != want_merge)
420 continue;
422 if (rm->peer_ref) {
423 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
424 strcpy(ref->name, rm->peer_ref->name);
425 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
426 hashcpy(ref->new_sha1, rm->old_sha1);
427 ref->force = rm->peer_ref->force;
431 if (!strcmp(rm->name, "HEAD")) {
432 kind = "";
433 what = "";
435 else if (!prefixcmp(rm->name, "refs/heads/")) {
436 kind = "branch";
437 what = rm->name + 11;
439 else if (!prefixcmp(rm->name, "refs/tags/")) {
440 kind = "tag";
441 what = rm->name + 10;
443 else if (!prefixcmp(rm->name, "refs/remotes/")) {
444 kind = "remote-tracking branch";
445 what = rm->name + 13;
447 else {
448 kind = "";
449 what = rm->name;
452 url_len = strlen(url);
453 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
455 url_len = i + 1;
456 if (4 < i && !strncmp(".git", url + i - 3, 4))
457 url_len = i - 3;
459 strbuf_reset(&note);
460 if (*what) {
461 if (*kind)
462 strbuf_addf(&note, "%s ", kind);
463 strbuf_addf(&note, "'%s' of ", what);
465 fprintf(fp, "%s\t%s\t%s",
466 sha1_to_hex(rm->old_sha1),
467 rm->merge ? "" : "not-for-merge",
468 note.buf);
469 for (i = 0; i < url_len; ++i)
470 if ('\n' == url[i])
471 fputs("\\n", fp);
472 else
473 fputc(url[i], fp);
474 fputc('\n', fp);
476 strbuf_reset(&note);
477 if (ref) {
478 rc |= update_local_ref(ref, what, rm, &note);
479 free(ref);
480 } else
481 strbuf_addf(&note, "* %-*s %-*s -> FETCH_HEAD",
482 TRANSPORT_SUMMARY_WIDTH,
483 *kind ? kind : "branch",
484 REFCOL_WIDTH,
485 *what ? what : "HEAD");
486 if (note.len) {
487 if (verbosity >= 0 && !shown_url) {
488 fprintf(stderr, _("From %.*s\n"),
489 url_len, url);
490 shown_url = 1;
492 if (verbosity >= 0)
493 fprintf(stderr, " %s\n", note.buf);
498 if (rc & STORE_REF_ERROR_DF_CONFLICT)
499 error(_("some local refs could not be updated; try running\n"
500 " 'git remote prune %s' to remove any old, conflicting "
501 "branches"), remote_name);
503 abort:
504 strbuf_release(&note);
505 free(url);
506 fclose(fp);
507 return rc;
511 * We would want to bypass the object transfer altogether if
512 * everything we are going to fetch already exists and is connected
513 * locally.
515 static int quickfetch(struct ref *ref_map)
517 struct ref *rm = ref_map;
520 * If we are deepening a shallow clone we already have these
521 * objects reachable. Running rev-list here will return with
522 * a good (0) exit status and we'll bypass the fetch that we
523 * really need to perform. Claiming failure now will ensure
524 * we perform the network exchange to deepen our history.
526 if (depth)
527 return -1;
528 return check_everything_connected(iterate_ref_map, 1, &rm);
531 static int fetch_refs(struct transport *transport, struct ref *ref_map)
533 int ret = quickfetch(ref_map);
534 if (ret)
535 ret = transport_fetch_refs(transport, ref_map);
536 if (!ret)
537 ret |= store_updated_refs(transport->url,
538 transport->remote->name,
539 ref_map);
540 transport_unlock_pack(transport);
541 return ret;
544 static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map)
546 int result = 0;
547 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
548 const char *dangling_msg = dry_run
549 ? _(" (%s will become dangling)")
550 : _(" (%s has become dangling)");
552 for (ref = stale_refs; ref; ref = ref->next) {
553 if (!dry_run)
554 result |= delete_ref(ref->name, NULL, 0);
555 if (verbosity >= 0) {
556 fprintf(stderr, " x %-*s %-*s -> %s\n",
557 TRANSPORT_SUMMARY(_("[deleted]")),
558 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
559 warn_dangling_symref(stderr, dangling_msg, ref->name);
562 free_refs(stale_refs);
563 return result;
566 static int add_existing(const char *refname, const unsigned char *sha1,
567 int flag, void *cbdata)
569 struct string_list *list = (struct string_list *)cbdata;
570 struct string_list_item *item = string_list_insert(list, refname);
571 item->util = (void *)sha1;
572 return 0;
575 static int will_fetch(struct ref **head, const unsigned char *sha1)
577 struct ref *rm = *head;
578 while (rm) {
579 if (!hashcmp(rm->old_sha1, sha1))
580 return 1;
581 rm = rm->next;
583 return 0;
586 static void find_non_local_tags(struct transport *transport,
587 struct ref **head,
588 struct ref ***tail)
590 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
591 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
592 const struct ref *ref;
593 struct string_list_item *item = NULL;
595 for_each_ref(add_existing, &existing_refs);
596 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
597 if (prefixcmp(ref->name, "refs/tags/"))
598 continue;
601 * The peeled ref always follows the matching base
602 * ref, so if we see a peeled ref that we don't want
603 * to fetch then we can mark the ref entry in the list
604 * as one to ignore by setting util to NULL.
606 if (!suffixcmp(ref->name, "^{}")) {
607 if (item && !has_sha1_file(ref->old_sha1) &&
608 !will_fetch(head, ref->old_sha1) &&
609 !has_sha1_file(item->util) &&
610 !will_fetch(head, item->util))
611 item->util = NULL;
612 item = NULL;
613 continue;
617 * If item is non-NULL here, then we previously saw a
618 * ref not followed by a peeled reference, so we need
619 * to check if it is a lightweight tag that we want to
620 * fetch.
622 if (item && !has_sha1_file(item->util) &&
623 !will_fetch(head, item->util))
624 item->util = NULL;
626 item = NULL;
628 /* skip duplicates and refs that we already have */
629 if (string_list_has_string(&remote_refs, ref->name) ||
630 string_list_has_string(&existing_refs, ref->name))
631 continue;
633 item = string_list_insert(&remote_refs, ref->name);
634 item->util = (void *)ref->old_sha1;
636 string_list_clear(&existing_refs, 0);
639 * We may have a final lightweight tag that needs to be
640 * checked to see if it needs fetching.
642 if (item && !has_sha1_file(item->util) &&
643 !will_fetch(head, item->util))
644 item->util = NULL;
647 * For all the tags in the remote_refs string list,
648 * add them to the list of refs to be fetched
650 for_each_string_list_item(item, &remote_refs) {
651 /* Unless we have already decided to ignore this item... */
652 if (item->util)
654 struct ref *rm = alloc_ref(item->string);
655 rm->peer_ref = alloc_ref(item->string);
656 hashcpy(rm->old_sha1, item->util);
657 **tail = rm;
658 *tail = &rm->next;
662 string_list_clear(&remote_refs, 0);
665 static void check_not_current_branch(struct ref *ref_map)
667 struct branch *current_branch = branch_get(NULL);
669 if (is_bare_repository() || !current_branch)
670 return;
672 for (; ref_map; ref_map = ref_map->next)
673 if (ref_map->peer_ref && !strcmp(current_branch->refname,
674 ref_map->peer_ref->name))
675 die(_("Refusing to fetch into current branch %s "
676 "of non-bare repository"), current_branch->refname);
679 static int truncate_fetch_head(void)
681 char *filename = git_path("FETCH_HEAD");
682 FILE *fp = fopen(filename, "w");
684 if (!fp)
685 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
686 fclose(fp);
687 return 0;
690 static int do_fetch(struct transport *transport,
691 struct refspec *refs, int ref_count)
693 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
694 struct string_list_item *peer_item = NULL;
695 struct ref *ref_map;
696 struct ref *rm;
697 int autotags = (transport->remote->fetch_tags == 1);
699 for_each_ref(add_existing, &existing_refs);
701 if (tags == TAGS_DEFAULT) {
702 if (transport->remote->fetch_tags == 2)
703 tags = TAGS_SET;
704 if (transport->remote->fetch_tags == -1)
705 tags = TAGS_UNSET;
708 if (!transport->get_refs_list || !transport->fetch)
709 die(_("Don't know how to fetch from %s"), transport->url);
711 /* if not appending, truncate FETCH_HEAD */
712 if (!append && !dry_run) {
713 int errcode = truncate_fetch_head();
714 if (errcode)
715 return errcode;
718 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
719 if (!update_head_ok)
720 check_not_current_branch(ref_map);
722 for (rm = ref_map; rm; rm = rm->next) {
723 if (rm->peer_ref) {
724 peer_item = string_list_lookup(&existing_refs,
725 rm->peer_ref->name);
726 if (peer_item)
727 hashcpy(rm->peer_ref->old_sha1,
728 peer_item->util);
732 if (tags == TAGS_DEFAULT && autotags)
733 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
734 if (fetch_refs(transport, ref_map)) {
735 free_refs(ref_map);
736 return 1;
738 if (prune) {
739 /* If --tags was specified, pretend the user gave us the canonical tags refspec */
740 if (tags == TAGS_SET) {
741 const char *tags_str = "refs/tags/*:refs/tags/*";
742 struct refspec *tags_refspec, *refspec;
744 /* Copy the refspec and add the tags to it */
745 refspec = xcalloc(ref_count + 1, sizeof(struct refspec));
746 tags_refspec = parse_fetch_refspec(1, &tags_str);
747 memcpy(refspec, refs, ref_count * sizeof(struct refspec));
748 memcpy(&refspec[ref_count], tags_refspec, sizeof(struct refspec));
749 ref_count++;
751 prune_refs(refspec, ref_count, ref_map);
753 ref_count--;
754 /* The rest of the strings belong to fetch_one */
755 free_refspec(1, tags_refspec);
756 free(refspec);
757 } else if (ref_count) {
758 prune_refs(refs, ref_count, ref_map);
759 } else {
760 prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map);
763 free_refs(ref_map);
765 /* if neither --no-tags nor --tags was specified, do automated tag
766 * following ... */
767 if (tags == TAGS_DEFAULT && autotags) {
768 struct ref **tail = &ref_map;
769 ref_map = NULL;
770 find_non_local_tags(transport, &ref_map, &tail);
771 if (ref_map) {
772 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
773 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
774 fetch_refs(transport, ref_map);
776 free_refs(ref_map);
779 return 0;
782 static void set_option(const char *name, const char *value)
784 int r = transport_set_option(transport, name, value);
785 if (r < 0)
786 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
787 name, value, transport->url);
788 if (r > 0)
789 warning(_("Option \"%s\" is ignored for %s\n"),
790 name, transport->url);
793 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
795 struct string_list *list = priv;
796 if (!remote->skip_default_update)
797 string_list_append(list, remote->name);
798 return 0;
801 struct remote_group_data {
802 const char *name;
803 struct string_list *list;
806 static int get_remote_group(const char *key, const char *value, void *priv)
808 struct remote_group_data *g = priv;
810 if (!prefixcmp(key, "remotes.") &&
811 !strcmp(key + 8, g->name)) {
812 /* split list by white space */
813 int space = strcspn(value, " \t\n");
814 while (*value) {
815 if (space > 1) {
816 string_list_append(g->list,
817 xstrndup(value, space));
819 value += space + (value[space] != '\0');
820 space = strcspn(value, " \t\n");
824 return 0;
827 static int add_remote_or_group(const char *name, struct string_list *list)
829 int prev_nr = list->nr;
830 struct remote_group_data g;
831 g.name = name; g.list = list;
833 git_config(get_remote_group, &g);
834 if (list->nr == prev_nr) {
835 struct remote *remote;
836 if (!remote_is_configured(name))
837 return 0;
838 remote = remote_get(name);
839 string_list_append(list, remote->name);
841 return 1;
844 static void add_options_to_argv(struct argv_array *argv)
846 if (dry_run)
847 argv_array_push(argv, "--dry-run");
848 if (prune)
849 argv_array_push(argv, "--prune");
850 if (update_head_ok)
851 argv_array_push(argv, "--update-head-ok");
852 if (force)
853 argv_array_push(argv, "--force");
854 if (keep)
855 argv_array_push(argv, "--keep");
856 if (recurse_submodules == RECURSE_SUBMODULES_ON)
857 argv_array_push(argv, "--recurse-submodules");
858 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
859 argv_array_push(argv, "--recurse-submodules=on-demand");
860 if (tags == TAGS_SET)
861 argv_array_push(argv, "--tags");
862 else if (tags == TAGS_UNSET)
863 argv_array_push(argv, "--no-tags");
864 if (verbosity >= 2)
865 argv_array_push(argv, "-v");
866 if (verbosity >= 1)
867 argv_array_push(argv, "-v");
868 else if (verbosity < 0)
869 argv_array_push(argv, "-q");
873 static int fetch_multiple(struct string_list *list)
875 int i, result = 0;
876 struct argv_array argv = ARGV_ARRAY_INIT;
878 if (!append && !dry_run) {
879 int errcode = truncate_fetch_head();
880 if (errcode)
881 return errcode;
884 argv_array_pushl(&argv, "fetch", "--append", NULL);
885 add_options_to_argv(&argv);
887 for (i = 0; i < list->nr; i++) {
888 const char *name = list->items[i].string;
889 argv_array_push(&argv, name);
890 if (verbosity >= 0)
891 printf(_("Fetching %s\n"), name);
892 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
893 error(_("Could not fetch %s"), name);
894 result = 1;
896 argv_array_pop(&argv);
899 argv_array_clear(&argv);
900 return result;
903 static int fetch_one(struct remote *remote, int argc, const char **argv)
905 int i;
906 static const char **refs = NULL;
907 struct refspec *refspec;
908 int ref_nr = 0;
909 int exit_code;
911 if (!remote)
912 die(_("No remote repository specified. Please, specify either a URL or a\n"
913 "remote name from which new revisions should be fetched."));
915 transport = transport_get(remote, NULL);
916 transport_set_verbosity(transport, verbosity, progress);
917 if (upload_pack)
918 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
919 if (keep)
920 set_option(TRANS_OPT_KEEP, "yes");
921 if (depth)
922 set_option(TRANS_OPT_DEPTH, depth);
924 if (argc > 0) {
925 int j = 0;
926 refs = xcalloc(argc + 1, sizeof(const char *));
927 for (i = 0; i < argc; i++) {
928 if (!strcmp(argv[i], "tag")) {
929 char *ref;
930 i++;
931 if (i >= argc)
932 die(_("You need to specify a tag name."));
933 ref = xmalloc(strlen(argv[i]) * 2 + 22);
934 strcpy(ref, "refs/tags/");
935 strcat(ref, argv[i]);
936 strcat(ref, ":refs/tags/");
937 strcat(ref, argv[i]);
938 refs[j++] = ref;
939 } else
940 refs[j++] = argv[i];
942 refs[j] = NULL;
943 ref_nr = j;
946 sigchain_push_common(unlock_pack_on_signal);
947 atexit(unlock_pack);
948 refspec = parse_fetch_refspec(ref_nr, refs);
949 exit_code = do_fetch(transport, refspec, ref_nr);
950 free_refspec(ref_nr, refspec);
951 transport_disconnect(transport);
952 transport = NULL;
953 return exit_code;
956 int cmd_fetch(int argc, const char **argv, const char *prefix)
958 int i;
959 struct string_list list = STRING_LIST_INIT_NODUP;
960 struct remote *remote;
961 int result = 0;
963 packet_trace_identity("fetch");
965 /* Record the command line for the reflog */
966 strbuf_addstr(&default_rla, "fetch");
967 for (i = 1; i < argc; i++)
968 strbuf_addf(&default_rla, " %s", argv[i]);
970 argc = parse_options(argc, argv, prefix,
971 builtin_fetch_options, builtin_fetch_usage, 0);
973 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
974 if (recurse_submodules_default) {
975 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
976 set_config_fetch_recurse_submodules(arg);
978 gitmodules_config();
979 git_config(submodule_config, NULL);
982 if (all) {
983 if (argc == 1)
984 die(_("fetch --all does not take a repository argument"));
985 else if (argc > 1)
986 die(_("fetch --all does not make sense with refspecs"));
987 (void) for_each_remote(get_one_remote_for_fetch, &list);
988 result = fetch_multiple(&list);
989 } else if (argc == 0) {
990 /* No arguments -- use default remote */
991 remote = remote_get(NULL);
992 result = fetch_one(remote, argc, argv);
993 } else if (multiple) {
994 /* All arguments are assumed to be remotes or groups */
995 for (i = 0; i < argc; i++)
996 if (!add_remote_or_group(argv[i], &list))
997 die(_("No such remote or remote group: %s"), argv[i]);
998 result = fetch_multiple(&list);
999 } else {
1000 /* Single remote or group */
1001 (void) add_remote_or_group(argv[0], &list);
1002 if (list.nr > 1) {
1003 /* More than one remote */
1004 if (argc > 1)
1005 die(_("Fetching a group and specifying refspecs does not make sense"));
1006 result = fetch_multiple(&list);
1007 } else {
1008 /* Zero or one remotes */
1009 remote = remote_get(argv[0]);
1010 result = fetch_one(remote, argc-1, argv+1);
1014 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1015 struct argv_array options = ARGV_ARRAY_INIT;
1017 add_options_to_argv(&options);
1018 result = fetch_populated_submodules(&options,
1019 submodule_prefix,
1020 recurse_submodules,
1021 verbosity < 0);
1022 argv_array_clear(&options);
1025 /* All names were strdup()ed or strndup()ed */
1026 list.strdup_strings = 1;
1027 string_list_clear(&list, 0);
1029 return result;