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"
16static const char * const builtin_fetch_usage[] = {
18 "git fetch [<options>] [<repository> [<refspec>...]]",
19 "git fetch [<options>] <group>",
20 "git fetch --multiple [<options>] [(<repository> | <group>)...]",
21 "git fetch --all [<options>]",
22 NULL
23};
24enum {
26 TAGS_UNSET = 0,
27 TAGS_DEFAULT = 1,
28 TAGS_SET = 2
29};
30static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
32static int progress, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
33static int tags = TAGS_DEFAULT;
34static const char *depth;
35static const char *upload_pack;
36static struct strbuf default_rla = STRBUF_INIT;
37static struct transport *transport;
38static const char *submodule_prefix = "";
39static const char *recurse_submodules_default;
40static int option_parse_recurse_submodules(const struct option *opt,
42 const char *arg, int unset)
43{
44 if (unset) {
45 recurse_submodules = RECURSE_SUBMODULES_OFF;
46 } else {
47 if (arg)
48 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
49 else
50 recurse_submodules = RECURSE_SUBMODULES_ON;
51 }
52 return 0;
53}
54static struct option builtin_fetch_options[] = {
56 OPT__VERBOSITY(&verbosity),
57 OPT_BOOLEAN(0, "all", &all,
58 "fetch from all remotes"),
59 OPT_BOOLEAN('a', "append", &append,
60 "append to .git/FETCH_HEAD instead of overwriting"),
61 OPT_STRING(0, "upload-pack", &upload_pack, "path",
62 "path to upload pack on remote end"),
63 OPT__FORCE(&force, "force overwrite of local branch"),
64 OPT_BOOLEAN('m', "multiple", &multiple,
65 "fetch from multiple remotes"),
66 OPT_SET_INT('t', "tags", &tags,
67 "fetch all tags and associated objects", TAGS_SET),
68 OPT_SET_INT('n', NULL, &tags,
69 "do not fetch all tags (--no-tags)", TAGS_UNSET),
70 OPT_BOOLEAN('p', "prune", &prune,
71 "prune remote-tracking branches no longer on remote"),
72 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, "on-demand",
73 "control recursive fetching of submodules",
74 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
75 OPT_BOOLEAN(0, "dry-run", &dry_run,
76 "dry run"),
77 OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
78 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
79 "allow updating of HEAD ref"),
80 OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
81 OPT_STRING(0, "depth", &depth, "depth",
82 "deepen history of shallow clone"),
83 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, "dir",
84 "prepend this to submodule path output", PARSE_OPT_HIDDEN },
85 { OPTION_STRING, 0, "recurse-submodules-default",
86 &recurse_submodules_default, NULL,
87 "default mode for recursion", PARSE_OPT_HIDDEN },
88 OPT_END()
89};
90static void unlock_pack(void)
92{
93 if (transport)
94 transport_unlock_pack(transport);
95}
96static void unlock_pack_on_signal(int signo)
98{
99 unlock_pack();
100 sigchain_pop(signo);
101 raise(signo);
102}
103static void add_merge_config(struct ref **head,
105 const struct ref *remote_refs,
106 struct branch *branch,
107 struct ref ***tail)
108{
109 int i;
110 for (i = 0; i < branch->merge_nr; i++) {
112 struct ref *rm, **old_tail = *tail;
113 struct refspec refspec;
114 for (rm = *head; rm; rm = rm->next) {
116 if (branch_merge_matches(branch, i, rm->name)) {
117 rm->merge = 1;
118 break;
119 }
120 }
121 if (rm)
122 continue;
123 /*
125 * Not fetched to a remote-tracking branch? We need to fetch
126 * it anyway to allow this branch's "branch.$name.merge"
127 * to be honored by 'git pull', but we do not have to
128 * fail if branch.$name.merge is misconfigured to point
129 * at a nonexisting branch. If we were indeed called by
130 * 'git pull', it will notice the misconfiguration because
131 * there is no entry in the resulting FETCH_HEAD marked
132 * for merging.
133 */
134 memset(&refspec, 0, sizeof(refspec));
135 refspec.src = branch->merge[i]->src;
136 get_fetch_map(remote_refs, &refspec, tail, 1);
137 for (rm = *old_tail; rm; rm = rm->next)
138 rm->merge = 1;
139 }
140}
141static void find_non_local_tags(struct transport *transport,
143 struct ref **head,
144 struct ref ***tail);
145static struct ref *get_ref_map(struct transport *transport,
147 struct refspec *refs, int ref_count, int tags,
148 int *autotags)
149{
150 int i;
151 struct ref *rm;
152 struct ref *ref_map = NULL;
153 struct ref **tail = &ref_map;
154 const struct ref *remote_refs = transport_get_remote_refs(transport);
156 if (ref_count || tags == TAGS_SET) {
158 for (i = 0; i < ref_count; i++) {
159 get_fetch_map(remote_refs, &refs[i], &tail, 0);
160 if (refs[i].dst && refs[i].dst[0])
161 *autotags = 1;
162 }
163 /* Merge everything on the command line, but not --tags */
164 for (rm = ref_map; rm; rm = rm->next)
165 rm->merge = 1;
166 if (tags == TAGS_SET)
167 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
168 } else {
169 /* Use the defaults */
170 struct remote *remote = transport->remote;
171 struct branch *branch = branch_get(NULL);
172 int has_merge = branch_has_merge_config(branch);
173 if (remote &&
174 (remote->fetch_refspec_nr ||
175 /* Note: has_merge implies non-NULL branch->remote_name */
176 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
177 for (i = 0; i < remote->fetch_refspec_nr; i++) {
178 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
179 if (remote->fetch[i].dst &&
180 remote->fetch[i].dst[0])
181 *autotags = 1;
182 if (!i && !has_merge && ref_map &&
183 !remote->fetch[0].pattern)
184 ref_map->merge = 1;
185 }
186 /*
187 * if the remote we're fetching from is the same
188 * as given in branch.<name>.remote, we add the
189 * ref given in branch.<name>.merge, too.
190 *
191 * Note: has_merge implies non-NULL branch->remote_name
192 */
193 if (has_merge &&
194 !strcmp(branch->remote_name, remote->name))
195 add_merge_config(&ref_map, remote_refs, branch, &tail);
196 } else {
197 ref_map = get_remote_ref(remote_refs, "HEAD");
198 if (!ref_map)
199 die(_("Couldn't find remote ref HEAD"));
200 ref_map->merge = 1;
201 tail = &ref_map->next;
202 }
203 }
204 if (tags == TAGS_DEFAULT && *autotags)
205 find_non_local_tags(transport, &ref_map, &tail);
206 ref_remove_duplicates(ref_map);
207 return ref_map;
209}
210#define STORE_REF_ERROR_OTHER 1
212#define STORE_REF_ERROR_DF_CONFLICT 2
213static int s_update_ref(const char *action,
215 struct ref *ref,
216 int check_old)
217{
218 char msg[1024];
219 char *rla = getenv("GIT_REFLOG_ACTION");
220 static struct ref_lock *lock;
221 if (dry_run)
223 return 0;
224 if (!rla)
225 rla = default_rla.buf;
226 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
227 lock = lock_any_ref_for_update(ref->name,
228 check_old ? ref->old_sha1 : NULL, 0);
229 if (!lock)
230 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
231 STORE_REF_ERROR_OTHER;
232 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
233 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
234 STORE_REF_ERROR_OTHER;
235 return 0;
236}
237#define REFCOL_WIDTH 10
239static int update_local_ref(struct ref *ref,
241 const char *remote,
242 struct strbuf *display)
243{
244 struct commit *current = NULL, *updated;
245 enum object_type type;
246 struct branch *current_branch = branch_get(NULL);
247 const char *pretty_ref = prettify_refname(ref->name);
248 type = sha1_object_info(ref->new_sha1, NULL);
250 if (type < 0)
251 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
252 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
254 if (verbosity > 0)
255 strbuf_addf(display, "= %-*s %-*s -> %s",
256 TRANSPORT_SUMMARY_WIDTH,
257 _("[up to date]"), REFCOL_WIDTH,
258 remote, pretty_ref);
259 return 0;
260 }
261 if (current_branch &&
263 !strcmp(ref->name, current_branch->name) &&
264 !(update_head_ok || is_bare_repository()) &&
265 !is_null_sha1(ref->old_sha1)) {
266 /*
267 * If this is the head, and it's not okay to update
268 * the head, and the old value of the head isn't empty...
269 */
270 strbuf_addf(display,
271 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
272 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
273 REFCOL_WIDTH, remote, pretty_ref);
274 return 1;
275 }
276 if (!is_null_sha1(ref->old_sha1) &&
278 !prefixcmp(ref->name, "refs/tags/")) {
279 int r;
280 r = s_update_ref("updating tag", ref, 0);
281 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
282 r ? '!' : '-',
283 TRANSPORT_SUMMARY_WIDTH, _("[tag update]"),
284 REFCOL_WIDTH, remote, pretty_ref,
285 r ? _(" (unable to update local ref)") : "");
286 return r;
287 }
288 current = lookup_commit_reference_gently(ref->old_sha1, 1);
290 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
291 if (!current || !updated) {
292 const char *msg;
293 const char *what;
294 int r;
295 if (!strncmp(ref->name, "refs/tags/", 10)) {
296 msg = "storing tag";
297 what = _("[new tag]");
298 }
299 else {
300 msg = "storing head";
301 what = _("[new branch]");
302 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
303 (recurse_submodules != RECURSE_SUBMODULES_ON))
304 check_for_new_submodule_commits(ref->new_sha1);
305 }
306 r = s_update_ref(msg, ref, 0);
308 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
309 r ? '!' : '*',
310 TRANSPORT_SUMMARY_WIDTH, what,
311 REFCOL_WIDTH, remote, pretty_ref,
312 r ? _(" (unable to update local ref)") : "");
313 return r;
314 }
315 if (in_merge_bases(current, &updated, 1)) {
317 char quickref[83];
318 int r;
319 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
320 strcat(quickref, "..");
321 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
322 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
323 (recurse_submodules != RECURSE_SUBMODULES_ON))
324 check_for_new_submodule_commits(ref->new_sha1);
325 r = s_update_ref("fast-forward", ref, 1);
326 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
327 r ? '!' : ' ',
328 TRANSPORT_SUMMARY_WIDTH, quickref,
329 REFCOL_WIDTH, remote, pretty_ref,
330 r ? _(" (unable to update local ref)") : "");
331 return r;
332 } else if (force || ref->force) {
333 char quickref[84];
334 int r;
335 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
336 strcat(quickref, "...");
337 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
338 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
339 (recurse_submodules != RECURSE_SUBMODULES_ON))
340 check_for_new_submodule_commits(ref->new_sha1);
341 r = s_update_ref("forced-update", ref, 1);
342 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
343 r ? '!' : '+',
344 TRANSPORT_SUMMARY_WIDTH, quickref,
345 REFCOL_WIDTH, remote, pretty_ref,
346 r ? _("unable to update local ref") : _("forced update"));
347 return r;
348 } else {
349 strbuf_addf(display, "! %-*s %-*s -> %s %s",
350 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
351 REFCOL_WIDTH, remote, pretty_ref,
352 _("(non-fast-forward)"));
353 return 1;
354 }
355}
356static int store_updated_refs(const char *raw_url, const char *remote_name,
358 struct ref *ref_map)
359{
360 FILE *fp;
361 struct commit *commit;
362 int url_len, i, shown_url = 0, rc = 0;
363 struct strbuf note = STRBUF_INIT;
364 const char *what, *kind;
365 struct ref *rm;
366 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
367 fp = fopen(filename, "a");
369 if (!fp)
370 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
371 if (raw_url)
373 url = transport_anonymize_url(raw_url);
374 else
375 url = xstrdup("foreign");
376 for (rm = ref_map; rm; rm = rm->next) {
377 struct ref *ref = NULL;
378 if (rm->peer_ref) {
380 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
381 strcpy(ref->name, rm->peer_ref->name);
382 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
383 hashcpy(ref->new_sha1, rm->old_sha1);
384 ref->force = rm->peer_ref->force;
385 }
386 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
388 if (!commit)
389 rm->merge = 0;
390 if (!strcmp(rm->name, "HEAD")) {
392 kind = "";
393 what = "";
394 }
395 else if (!prefixcmp(rm->name, "refs/heads/")) {
396 kind = "branch";
397 what = rm->name + 11;
398 }
399 else if (!prefixcmp(rm->name, "refs/tags/")) {
400 kind = "tag";
401 what = rm->name + 10;
402 }
403 else if (!prefixcmp(rm->name, "refs/remotes/")) {
404 kind = "remote-tracking branch";
405 what = rm->name + 13;
406 }
407 else {
408 kind = "";
409 what = rm->name;
410 }
411 url_len = strlen(url);
413 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
414 ;
415 url_len = i + 1;
416 if (4 < i && !strncmp(".git", url + i - 3, 4))
417 url_len = i - 3;
418 strbuf_reset(¬e);
420 if (*what) {
421 if (*kind)
422 strbuf_addf(¬e, "%s ", kind);
423 strbuf_addf(¬e, "'%s' of ", what);
424 }
425 fprintf(fp, "%s\t%s\t%s",
426 sha1_to_hex(commit ? commit->object.sha1 :
427 rm->old_sha1),
428 rm->merge ? "" : "not-for-merge",
429 note.buf);
430 for (i = 0; i < url_len; ++i)
431 if ('\n' == url[i])
432 fputs("\\n", fp);
433 else
434 fputc(url[i], fp);
435 fputc('\n', fp);
436 strbuf_reset(¬e);
438 if (ref) {
439 rc |= update_local_ref(ref, what, ¬e);
440 free(ref);
441 } else
442 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
443 TRANSPORT_SUMMARY_WIDTH,
444 *kind ? kind : "branch",
445 REFCOL_WIDTH,
446 *what ? what : "HEAD");
447 if (note.len) {
448 if (verbosity >= 0 && !shown_url) {
449 fprintf(stderr, _("From %.*s\n"),
450 url_len, url);
451 shown_url = 1;
452 }
453 if (verbosity >= 0)
454 fprintf(stderr, " %s\n", note.buf);
455 }
456 }
457 free(url);
458 fclose(fp);
459 if (rc & STORE_REF_ERROR_DF_CONFLICT)
460 error(_("some local refs could not be updated; try running\n"
461 " 'git remote prune %s' to remove any old, conflicting "
462 "branches"), remote_name);
463 strbuf_release(¬e);
464 return rc;
465}
466/*
468 * We would want to bypass the object transfer altogether if
469 * everything we are going to fetch already exists and is connected
470 * locally.
471 *
472 * The refs we are going to fetch are in ref_map. If running
473 *
474 * $ git rev-list --objects --stdin --not --all
475 *
476 * (feeding all the refs in ref_map on its standard input)
477 * does not error out, that means everything reachable from the
478 * refs we are going to fetch exists and is connected to some of
479 * our existing refs.
480 */
481static int quickfetch(struct ref *ref_map)
482{
483 struct child_process revlist;
484 struct ref *ref;
485 int err;
486 const char *argv[] = {"rev-list",
487 "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
488 /*
490 * If we are deepening a shallow clone we already have these
491 * objects reachable. Running rev-list here will return with
492 * a good (0) exit status and we'll bypass the fetch that we
493 * really need to perform. Claiming failure now will ensure
494 * we perform the network exchange to deepen our history.
495 */
496 if (depth)
497 return -1;
498 if (!ref_map)
500 return 0;
501 memset(&revlist, 0, sizeof(revlist));
503 revlist.argv = argv;
504 revlist.git_cmd = 1;
505 revlist.no_stdout = 1;
506 revlist.no_stderr = 1;
507 revlist.in = -1;
508 err = start_command(&revlist);
510 if (err) {
511 error(_("could not run rev-list"));
512 return err;
513 }
514 /*
516 * If rev-list --stdin encounters an unknown commit, it terminates,
517 * which will cause SIGPIPE in the write loop below.
518 */
519 sigchain_push(SIGPIPE, SIG_IGN);
520 for (ref = ref_map; ref; ref = ref->next) {
522 if (write_in_full(revlist.in, sha1_to_hex(ref->old_sha1), 40) < 0 ||
523 write_str_in_full(revlist.in, "\n") < 0) {
524 if (errno != EPIPE && errno != EINVAL)
525 error(_("failed write to rev-list: %s"), strerror(errno));
526 err = -1;
527 break;
528 }
529 }
530 if (close(revlist.in)) {
532 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
533 err = -1;
534 }
535 sigchain_pop(SIGPIPE);
537 return finish_command(&revlist) || err;
539}
540static int fetch_refs(struct transport *transport, struct ref *ref_map)
542{
543 int ret = quickfetch(ref_map);
544 if (ret)
545 ret = transport_fetch_refs(transport, ref_map);
546 if (!ret)
547 ret |= store_updated_refs(transport->url,
548 transport->remote->name,
549 ref_map);
550 transport_unlock_pack(transport);
551 return ret;
552}
553static int prune_refs(struct transport *transport, struct ref *ref_map)
555{
556 int result = 0;
557 struct ref *ref, *stale_refs = get_stale_heads(transport->remote, ref_map);
558 const char *dangling_msg = dry_run
559 ? _(" (%s will become dangling)\n")
560 : _(" (%s has become dangling)\n");
561 for (ref = stale_refs; ref; ref = ref->next) {
563 if (!dry_run)
564 result |= delete_ref(ref->name, NULL, 0);
565 if (verbosity >= 0) {
566 fprintf(stderr, " x %-*s %-*s -> %s\n",
567 TRANSPORT_SUMMARY_WIDTH, _("[deleted]"),
568 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
569 warn_dangling_symref(stderr, dangling_msg, ref->name);
570 }
571 }
572 free_refs(stale_refs);
573 return result;
574}
575static int add_existing(const char *refname, const unsigned char *sha1,
577 int flag, void *cbdata)
578{
579 struct string_list *list = (struct string_list *)cbdata;
580 struct string_list_item *item = string_list_insert(list, refname);
581 item->util = (void *)sha1;
582 return 0;
583}
584static int will_fetch(struct ref **head, const unsigned char *sha1)
586{
587 struct ref *rm = *head;
588 while (rm) {
589 if (!hashcmp(rm->old_sha1, sha1))
590 return 1;
591 rm = rm->next;
592 }
593 return 0;
594}
595static void find_non_local_tags(struct transport *transport,
597 struct ref **head,
598 struct ref ***tail)
599{
600 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
601 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
602 const struct ref *ref;
603 struct string_list_item *item = NULL;
604 for_each_ref(add_existing, &existing_refs);
606 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
607 if (prefixcmp(ref->name, "refs/tags"))
608 continue;
609 /*
611 * The peeled ref always follows the matching base
612 * ref, so if we see a peeled ref that we don't want
613 * to fetch then we can mark the ref entry in the list
614 * as one to ignore by setting util to NULL.
615 */
616 if (!suffixcmp(ref->name, "^{}")) {
617 if (item && !has_sha1_file(ref->old_sha1) &&
618 !will_fetch(head, ref->old_sha1) &&
619 !has_sha1_file(item->util) &&
620 !will_fetch(head, item->util))
621 item->util = NULL;
622 item = NULL;
623 continue;
624 }
625 /*
627 * If item is non-NULL here, then we previously saw a
628 * ref not followed by a peeled reference, so we need
629 * to check if it is a lightweight tag that we want to
630 * fetch.
631 */
632 if (item && !has_sha1_file(item->util) &&
633 !will_fetch(head, item->util))
634 item->util = NULL;
635 item = NULL;
637 /* skip duplicates and refs that we already have */
639 if (string_list_has_string(&remote_refs, ref->name) ||
640 string_list_has_string(&existing_refs, ref->name))
641 continue;
642 item = string_list_insert(&remote_refs, ref->name);
644 item->util = (void *)ref->old_sha1;
645 }
646 string_list_clear(&existing_refs, 0);
647 /*
649 * We may have a final lightweight tag that needs to be
650 * checked to see if it needs fetching.
651 */
652 if (item && !has_sha1_file(item->util) &&
653 !will_fetch(head, item->util))
654 item->util = NULL;
655 /*
657 * For all the tags in the remote_refs string list,
658 * add them to the list of refs to be fetched
659 */
660 for_each_string_list_item(item, &remote_refs) {
661 /* Unless we have already decided to ignore this item... */
662 if (item->util)
663 {
664 struct ref *rm = alloc_ref(item->string);
665 rm->peer_ref = alloc_ref(item->string);
666 hashcpy(rm->old_sha1, item->util);
667 **tail = rm;
668 *tail = &rm->next;
669 }
670 }
671 string_list_clear(&remote_refs, 0);
673}
674static void check_not_current_branch(struct ref *ref_map)
676{
677 struct branch *current_branch = branch_get(NULL);
678 if (is_bare_repository() || !current_branch)
680 return;
681 for (; ref_map; ref_map = ref_map->next)
683 if (ref_map->peer_ref && !strcmp(current_branch->refname,
684 ref_map->peer_ref->name))
685 die(_("Refusing to fetch into current branch %s "
686 "of non-bare repository"), current_branch->refname);
687}
688static int truncate_fetch_head(void)
690{
691 char *filename = git_path("FETCH_HEAD");
692 FILE *fp = fopen(filename, "w");
693 if (!fp)
695 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
696 fclose(fp);
697 return 0;
698}
699static int do_fetch(struct transport *transport,
701 struct refspec *refs, int ref_count)
702{
703 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
704 struct string_list_item *peer_item = NULL;
705 struct ref *ref_map;
706 struct ref *rm;
707 int autotags = (transport->remote->fetch_tags == 1);
708 for_each_ref(add_existing, &existing_refs);
710 if (tags == TAGS_DEFAULT) {
712 if (transport->remote->fetch_tags == 2)
713 tags = TAGS_SET;
714 if (transport->remote->fetch_tags == -1)
715 tags = TAGS_UNSET;
716 }
717 if (!transport->get_refs_list || !transport->fetch)
719 die(_("Don't know how to fetch from %s"), transport->url);
720 /* if not appending, truncate FETCH_HEAD */
722 if (!append && !dry_run) {
723 int errcode = truncate_fetch_head();
724 if (errcode)
725 return errcode;
726 }
727 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
729 if (!update_head_ok)
730 check_not_current_branch(ref_map);
731 for (rm = ref_map; rm; rm = rm->next) {
733 if (rm->peer_ref) {
734 peer_item = string_list_lookup(&existing_refs,
735 rm->peer_ref->name);
736 if (peer_item)
737 hashcpy(rm->peer_ref->old_sha1,
738 peer_item->util);
739 }
740 }
741 if (tags == TAGS_DEFAULT && autotags)
743 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
744 if (fetch_refs(transport, ref_map)) {
745 free_refs(ref_map);
746 return 1;
747 }
748 if (prune)
749 prune_refs(transport, ref_map);
750 free_refs(ref_map);
751 /* if neither --no-tags nor --tags was specified, do automated tag
753 * following ... */
754 if (tags == TAGS_DEFAULT && autotags) {
755 struct ref **tail = &ref_map;
756 ref_map = NULL;
757 find_non_local_tags(transport, &ref_map, &tail);
758 if (ref_map) {
759 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
760 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
761 fetch_refs(transport, ref_map);
762 }
763 free_refs(ref_map);
764 }
765 return 0;
767}
768static void set_option(const char *name, const char *value)
770{
771 int r = transport_set_option(transport, name, value);
772 if (r < 0)
773 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
774 name, value, transport->url);
775 if (r > 0)
776 warning(_("Option \"%s\" is ignored for %s\n"),
777 name, transport->url);
778}
779static int get_one_remote_for_fetch(struct remote *remote, void *priv)
781{
782 struct string_list *list = priv;
783 if (!remote->skip_default_update)
784 string_list_append(list, remote->name);
785 return 0;
786}
787struct remote_group_data {
789 const char *name;
790 struct string_list *list;
791};
792static int get_remote_group(const char *key, const char *value, void *priv)
794{
795 struct remote_group_data *g = priv;
796 if (!prefixcmp(key, "remotes.") &&
798 !strcmp(key + 8, g->name)) {
799 /* split list by white space */
800 int space = strcspn(value, " \t\n");
801 while (*value) {
802 if (space > 1) {
803 string_list_append(g->list,
804 xstrndup(value, space));
805 }
806 value += space + (value[space] != '\0');
807 space = strcspn(value, " \t\n");
808 }
809 }
810 return 0;
812}
813static int add_remote_or_group(const char *name, struct string_list *list)
815{
816 int prev_nr = list->nr;
817 struct remote_group_data g;
818 g.name = name; g.list = list;
819 git_config(get_remote_group, &g);
821 if (list->nr == prev_nr) {
822 struct remote *remote;
823 if (!remote_is_configured(name))
824 return 0;
825 remote = remote_get(name);
826 string_list_append(list, remote->name);
827 }
828 return 1;
829}
830static void add_options_to_argv(int *argc, const char **argv)
832{
833 if (dry_run)
834 argv[(*argc)++] = "--dry-run";
835 if (prune)
836 argv[(*argc)++] = "--prune";
837 if (update_head_ok)
838 argv[(*argc)++] = "--update-head-ok";
839 if (force)
840 argv[(*argc)++] = "--force";
841 if (keep)
842 argv[(*argc)++] = "--keep";
843 if (recurse_submodules == RECURSE_SUBMODULES_ON)
844 argv[(*argc)++] = "--recurse-submodules";
845 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
846 argv[(*argc)++] = "--recurse-submodules=on-demand";
847 if (verbosity >= 2)
848 argv[(*argc)++] = "-v";
849 if (verbosity >= 1)
850 argv[(*argc)++] = "-v";
851 else if (verbosity < 0)
852 argv[(*argc)++] = "-q";
853}
855static int fetch_multiple(struct string_list *list)
857{
858 int i, result = 0;
859 const char *argv[12] = { "fetch", "--append" };
860 int argc = 2;
861 add_options_to_argv(&argc, argv);
863 if (!append && !dry_run) {
865 int errcode = truncate_fetch_head();
866 if (errcode)
867 return errcode;
868 }
869 for (i = 0; i < list->nr; i++) {
871 const char *name = list->items[i].string;
872 argv[argc] = name;
873 argv[argc + 1] = NULL;
874 if (verbosity >= 0)
875 printf(_("Fetching %s\n"), name);
876 if (run_command_v_opt(argv, RUN_GIT_CMD)) {
877 error(_("Could not fetch %s"), name);
878 result = 1;
879 }
880 }
881 return result;
883}
884static int fetch_one(struct remote *remote, int argc, const char **argv)
886{
887 int i;
888 static const char **refs = NULL;
889 struct refspec *refspec;
890 int ref_nr = 0;
891 int exit_code;
892 if (!remote)
894 die(_("No remote repository specified. Please, specify either a URL or a\n"
895 "remote name from which new revisions should be fetched."));
896 transport = transport_get(remote, NULL);
898 transport_set_verbosity(transport, verbosity, progress);
899 if (upload_pack)
900 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
901 if (keep)
902 set_option(TRANS_OPT_KEEP, "yes");
903 if (depth)
904 set_option(TRANS_OPT_DEPTH, depth);
905 if (argc > 0) {
907 int j = 0;
908 refs = xcalloc(argc + 1, sizeof(const char *));
909 for (i = 0; i < argc; i++) {
910 if (!strcmp(argv[i], "tag")) {
911 char *ref;
912 i++;
913 if (i >= argc)
914 die(_("You need to specify a tag name."));
915 ref = xmalloc(strlen(argv[i]) * 2 + 22);
916 strcpy(ref, "refs/tags/");
917 strcat(ref, argv[i]);
918 strcat(ref, ":refs/tags/");
919 strcat(ref, argv[i]);
920 refs[j++] = ref;
921 } else
922 refs[j++] = argv[i];
923 }
924 refs[j] = NULL;
925 ref_nr = j;
926 }
927 sigchain_push_common(unlock_pack_on_signal);
929 atexit(unlock_pack);
930 refspec = parse_fetch_refspec(ref_nr, refs);
931 exit_code = do_fetch(transport, refspec, ref_nr);
932 free(refspec);
933 transport_disconnect(transport);
934 transport = NULL;
935 return exit_code;
936}
937int cmd_fetch(int argc, const char **argv, const char *prefix)
939{
940 int i;
941 struct string_list list = STRING_LIST_INIT_NODUP;
942 struct remote *remote;
943 int result = 0;
944 packet_trace_identity("fetch");
946 /* Record the command line for the reflog */
948 strbuf_addstr(&default_rla, "fetch");
949 for (i = 1; i < argc; i++)
950 strbuf_addf(&default_rla, " %s", argv[i]);
951 argc = parse_options(argc, argv, prefix,
953 builtin_fetch_options, builtin_fetch_usage, 0);
954 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
956 if (recurse_submodules_default) {
957 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
958 set_config_fetch_recurse_submodules(arg);
959 }
960 gitmodules_config();
961 git_config(submodule_config, NULL);
962 }
963 if (all) {
965 if (argc == 1)
966 die(_("fetch --all does not take a repository argument"));
967 else if (argc > 1)
968 die(_("fetch --all does not make sense with refspecs"));
969 (void) for_each_remote(get_one_remote_for_fetch, &list);
970 result = fetch_multiple(&list);
971 } else if (argc == 0) {
972 /* No arguments -- use default remote */
973 remote = remote_get(NULL);
974 result = fetch_one(remote, argc, argv);
975 } else if (multiple) {
976 /* All arguments are assumed to be remotes or groups */
977 for (i = 0; i < argc; i++)
978 if (!add_remote_or_group(argv[i], &list))
979 die(_("No such remote or remote group: %s"), argv[i]);
980 result = fetch_multiple(&list);
981 } else {
982 /* Single remote or group */
983 (void) add_remote_or_group(argv[0], &list);
984 if (list.nr > 1) {
985 /* More than one remote */
986 if (argc > 1)
987 die(_("Fetching a group and specifying refspecs does not make sense"));
988 result = fetch_multiple(&list);
989 } else {
990 /* Zero or one remotes */
991 remote = remote_get(argv[0]);
992 result = fetch_one(remote, argc-1, argv+1);
993 }
994 }
995 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
997 const char *options[10];
998 int num_options = 0;
999 add_options_to_argv(&num_options, options);
1000 result = fetch_populated_submodules(num_options, options,
1001 submodule_prefix,
1002 recurse_submodules,
1003 verbosity < 0);
1004 }
1005 /* All names were strdup()ed or strndup()ed */
1007 list.strdup_strings = 1;
1008 string_list_clear(&list, 0);
1009 return result;
1011}