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 char *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 *display = 0;
250 type = sha1_object_info(ref->new_sha1, NULL);
251 if (type < 0)
252 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
253 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
255 if (verbosity > 0)
256 sprintf(display, "= %-*s %-*s -> %s", TRANSPORT_SUMMARY_WIDTH,
257 _("[up to date]"), REFCOL_WIDTH, remote,
258 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 sprintf(display, _("! %-*s %-*s -> %s (can't fetch in current branch)"),
271 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"), REFCOL_WIDTH, remote,
272 pretty_ref);
273 return 1;
274 }
275 if (!is_null_sha1(ref->old_sha1) &&
277 !prefixcmp(ref->name, "refs/tags/")) {
278 int r;
279 r = s_update_ref("updating tag", ref, 0);
280 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
281 TRANSPORT_SUMMARY_WIDTH, _("[tag update]"), REFCOL_WIDTH, remote,
282 pretty_ref, r ? _(" (unable to update local ref)") : "");
283 return r;
284 }
285 current = lookup_commit_reference_gently(ref->old_sha1, 1);
287 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
288 if (!current || !updated) {
289 const char *msg;
290 const char *what;
291 int r;
292 if (!strncmp(ref->name, "refs/tags/", 10)) {
293 msg = "storing tag";
294 what = _("[new tag]");
295 }
296 else {
297 msg = "storing head";
298 what = _("[new branch]");
299 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
300 (recurse_submodules != RECURSE_SUBMODULES_ON))
301 check_for_new_submodule_commits(ref->new_sha1);
302 }
303 r = s_update_ref(msg, ref, 0);
305 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
306 TRANSPORT_SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
307 r ? _(" (unable to update local ref)") : "");
308 return r;
309 }
310 if (in_merge_bases(current, &updated, 1)) {
312 char quickref[83];
313 int r;
314 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
315 strcat(quickref, "..");
316 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
317 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
318 (recurse_submodules != RECURSE_SUBMODULES_ON))
319 check_for_new_submodule_commits(ref->new_sha1);
320 r = s_update_ref("fast-forward", ref, 1);
321 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
322 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
323 pretty_ref, r ? _(" (unable to update local ref)") : "");
324 return r;
325 } else if (force || ref->force) {
326 char quickref[84];
327 int r;
328 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
329 strcat(quickref, "...");
330 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
331 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
332 (recurse_submodules != RECURSE_SUBMODULES_ON))
333 check_for_new_submodule_commits(ref->new_sha1);
334 r = s_update_ref("forced-update", ref, 1);
335 sprintf(display, "%c %-*s %-*s -> %s (%s)", r ? '!' : '+',
336 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
337 pretty_ref,
338 r ? _("unable to update local ref") : _("forced update"));
339 return r;
340 } else {
341 sprintf(display, "! %-*s %-*s -> %s %s",
342 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"), REFCOL_WIDTH, remote,
343 pretty_ref, _("(non-fast-forward)"));
344 return 1;
345 }
346}
347/*
349 * The ref_map records the tips of the refs we are fetching. If
350 *
351 * $ git rev-list --verify-objects --stdin --not --all
352 *
353 * (feeding all the refs in ref_map on its standard input) does not
354 * error out, that means everything reachable from these updated refs
355 * locally exists and is connected to some of our existing refs.
356 *
357 * Returns 0 if everything is connected, non-zero otherwise.
358 */
359static int check_everything_connected(struct ref *ref_map, int quiet)
360{
361 struct child_process rev_list;
362 const char *argv[] = {"rev-list", "--verify-objects",
363 "--stdin", "--not", "--all", NULL, NULL};
364 char commit[41];
365 struct ref *ref;
366 int err = 0;
367 if (!ref_map)
369 return 0;
370 if (quiet)
372 argv[5] = "--quiet";
373 memset(&rev_list, 0, sizeof(rev_list));
375 rev_list.argv = argv;
376 rev_list.git_cmd = 1;
377 rev_list.in = -1;
378 rev_list.no_stdout = 1;
379 rev_list.no_stderr = quiet;
380 if (start_command(&rev_list))
381 return error(_("Could not run 'git rev-list'"));
382 sigchain_push(SIGPIPE, SIG_IGN);
384 memcpy(commit + 40, "\n", 2);
386 for (ref = ref_map; ref; ref = ref->next) {
387 memcpy(commit, sha1_to_hex(ref->old_sha1), 40);
388 if (write_in_full(rev_list.in, commit, 41) < 0) {
389 if (errno != EPIPE && errno != EINVAL)
390 error(_("failed write to rev-list: %s"),
391 strerror(errno));
392 err = -1;
393 break;
394 }
395 }
396 if (close(rev_list.in)) {
397 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
398 err = -1;
399 }
400 sigchain_pop(SIGPIPE);
402 return finish_command(&rev_list) || err;
404}
405static int store_updated_refs(const char *raw_url, const char *remote_name,
407 struct ref *ref_map)
408{
409 FILE *fp;
410 struct commit *commit;
411 int url_len, i, note_len, shown_url = 0, rc = 0;
412 char note[1024];
413 const char *what, *kind;
414 struct ref *rm;
415 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
416 fp = fopen(filename, "a");
418 if (!fp)
419 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
420 if (raw_url)
422 url = transport_anonymize_url(raw_url);
423 else
424 url = xstrdup("foreign");
425 if (check_everything_connected(ref_map, 0)) {
427 rc = error(_("%s did not send all necessary objects\n"), url);
428 goto abort;
429 }
430 for (rm = ref_map; rm; rm = rm->next) {
432 struct ref *ref = NULL;
433 if (rm->peer_ref) {
435 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
436 strcpy(ref->name, rm->peer_ref->name);
437 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
438 hashcpy(ref->new_sha1, rm->old_sha1);
439 ref->force = rm->peer_ref->force;
440 }
441 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
443 if (!commit)
444 rm->merge = 0;
445 if (!strcmp(rm->name, "HEAD")) {
447 kind = "";
448 what = "";
449 }
450 else if (!prefixcmp(rm->name, "refs/heads/")) {
451 kind = "branch";
452 what = rm->name + 11;
453 }
454 else if (!prefixcmp(rm->name, "refs/tags/")) {
455 kind = "tag";
456 what = rm->name + 10;
457 }
458 else if (!prefixcmp(rm->name, "refs/remotes/")) {
459 kind = "remote-tracking branch";
460 what = rm->name + 13;
461 }
462 else {
463 kind = "";
464 what = rm->name;
465 }
466 url_len = strlen(url);
468 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
469 ;
470 url_len = i + 1;
471 if (4 < i && !strncmp(".git", url + i - 3, 4))
472 url_len = i - 3;
473 note_len = 0;
475 if (*what) {
476 if (*kind)
477 note_len += sprintf(note + note_len, "%s ",
478 kind);
479 note_len += sprintf(note + note_len, "'%s' of ", what);
480 }
481 note[note_len] = '\0';
482 fprintf(fp, "%s\t%s\t%s",
483 sha1_to_hex(commit ? commit->object.sha1 :
484 rm->old_sha1),
485 rm->merge ? "" : "not-for-merge",
486 note);
487 for (i = 0; i < url_len; ++i)
488 if ('\n' == url[i])
489 fputs("\\n", fp);
490 else
491 fputc(url[i], fp);
492 fputc('\n', fp);
493 if (ref) {
495 rc |= update_local_ref(ref, what, note);
496 free(ref);
497 } else
498 sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
499 TRANSPORT_SUMMARY_WIDTH, *kind ? kind : "branch",
500 REFCOL_WIDTH, *what ? what : "HEAD");
501 if (*note) {
502 if (verbosity >= 0 && !shown_url) {
503 fprintf(stderr, _("From %.*s\n"),
504 url_len, url);
505 shown_url = 1;
506 }
507 if (verbosity >= 0)
508 fprintf(stderr, " %s\n", note);
509 }
510 }
511 if (rc & STORE_REF_ERROR_DF_CONFLICT)
513 error(_("some local refs could not be updated; try running\n"
514 " 'git remote prune %s' to remove any old, conflicting "
515 "branches"), remote_name);
516 abort:
518 free(url);
519 fclose(fp);
520 return rc;
521}
522/*
524 * We would want to bypass the object transfer altogether if
525 * everything we are going to fetch already exists and is connected
526 * locally.
527 */
528static int quickfetch(struct ref *ref_map)
529{
530 /*
531 * If we are deepening a shallow clone we already have these
532 * objects reachable. Running rev-list here will return with
533 * a good (0) exit status and we'll bypass the fetch that we
534 * really need to perform. Claiming failure now will ensure
535 * we perform the network exchange to deepen our history.
536 */
537 if (depth)
538 return -1;
539 return check_everything_connected(ref_map, 1);
540}
541static int fetch_refs(struct transport *transport, struct ref *ref_map)
543{
544 int ret = quickfetch(ref_map);
545 if (ret)
546 ret = transport_fetch_refs(transport, ref_map);
547 if (!ret)
548 ret |= store_updated_refs(transport->url,
549 transport->remote->name,
550 ref_map);
551 transport_unlock_pack(transport);
552 return ret;
553}
554static int prune_refs(struct transport *transport, struct ref *ref_map)
556{
557 int result = 0;
558 struct ref *ref, *stale_refs = get_stale_heads(transport->remote, ref_map);
559 const char *dangling_msg = dry_run
560 ? _(" (%s will become dangling)\n")
561 : _(" (%s has become dangling)\n");
562 for (ref = stale_refs; ref; ref = ref->next) {
564 if (!dry_run)
565 result |= delete_ref(ref->name, NULL, 0);
566 if (verbosity >= 0) {
567 fprintf(stderr, " x %-*s %-*s -> %s\n",
568 TRANSPORT_SUMMARY_WIDTH, _("[deleted]"),
569 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
570 warn_dangling_symref(stderr, dangling_msg, ref->name);
571 }
572 }
573 free_refs(stale_refs);
574 return result;
575}
576static int add_existing(const char *refname, const unsigned char *sha1,
578 int flag, void *cbdata)
579{
580 struct string_list *list = (struct string_list *)cbdata;
581 struct string_list_item *item = string_list_insert(list, refname);
582 item->util = (void *)sha1;
583 return 0;
584}
585static int will_fetch(struct ref **head, const unsigned char *sha1)
587{
588 struct ref *rm = *head;
589 while (rm) {
590 if (!hashcmp(rm->old_sha1, sha1))
591 return 1;
592 rm = rm->next;
593 }
594 return 0;
595}
596static void find_non_local_tags(struct transport *transport,
598 struct ref **head,
599 struct ref ***tail)
600{
601 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
602 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
603 const struct ref *ref;
604 struct string_list_item *item = NULL;
605 for_each_ref(add_existing, &existing_refs);
607 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
608 if (prefixcmp(ref->name, "refs/tags"))
609 continue;
610 /*
612 * The peeled ref always follows the matching base
613 * ref, so if we see a peeled ref that we don't want
614 * to fetch then we can mark the ref entry in the list
615 * as one to ignore by setting util to NULL.
616 */
617 if (!suffixcmp(ref->name, "^{}")) {
618 if (item && !has_sha1_file(ref->old_sha1) &&
619 !will_fetch(head, ref->old_sha1) &&
620 !has_sha1_file(item->util) &&
621 !will_fetch(head, item->util))
622 item->util = NULL;
623 item = NULL;
624 continue;
625 }
626 /*
628 * If item is non-NULL here, then we previously saw a
629 * ref not followed by a peeled reference, so we need
630 * to check if it is a lightweight tag that we want to
631 * fetch.
632 */
633 if (item && !has_sha1_file(item->util) &&
634 !will_fetch(head, item->util))
635 item->util = NULL;
636 item = NULL;
638 /* skip duplicates and refs that we already have */
640 if (string_list_has_string(&remote_refs, ref->name) ||
641 string_list_has_string(&existing_refs, ref->name))
642 continue;
643 item = string_list_insert(&remote_refs, ref->name);
645 item->util = (void *)ref->old_sha1;
646 }
647 string_list_clear(&existing_refs, 0);
648 /*
650 * We may have a final lightweight tag that needs to be
651 * checked to see if it needs fetching.
652 */
653 if (item && !has_sha1_file(item->util) &&
654 !will_fetch(head, item->util))
655 item->util = NULL;
656 /*
658 * For all the tags in the remote_refs string list,
659 * add them to the list of refs to be fetched
660 */
661 for_each_string_list_item(item, &remote_refs) {
662 /* Unless we have already decided to ignore this item... */
663 if (item->util)
664 {
665 struct ref *rm = alloc_ref(item->string);
666 rm->peer_ref = alloc_ref(item->string);
667 hashcpy(rm->old_sha1, item->util);
668 **tail = rm;
669 *tail = &rm->next;
670 }
671 }
672 string_list_clear(&remote_refs, 0);
674}
675static void check_not_current_branch(struct ref *ref_map)
677{
678 struct branch *current_branch = branch_get(NULL);
679 if (is_bare_repository() || !current_branch)
681 return;
682 for (; ref_map; ref_map = ref_map->next)
684 if (ref_map->peer_ref && !strcmp(current_branch->refname,
685 ref_map->peer_ref->name))
686 die(_("Refusing to fetch into current branch %s "
687 "of non-bare repository"), current_branch->refname);
688}
689static int truncate_fetch_head(void)
691{
692 char *filename = git_path("FETCH_HEAD");
693 FILE *fp = fopen(filename, "w");
694 if (!fp)
696 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
697 fclose(fp);
698 return 0;
699}
700static int do_fetch(struct transport *transport,
702 struct refspec *refs, int ref_count)
703{
704 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
705 struct string_list_item *peer_item = NULL;
706 struct ref *ref_map;
707 struct ref *rm;
708 int autotags = (transport->remote->fetch_tags == 1);
709 for_each_ref(add_existing, &existing_refs);
711 if (tags == TAGS_DEFAULT) {
713 if (transport->remote->fetch_tags == 2)
714 tags = TAGS_SET;
715 if (transport->remote->fetch_tags == -1)
716 tags = TAGS_UNSET;
717 }
718 if (!transport->get_refs_list || !transport->fetch)
720 die(_("Don't know how to fetch from %s"), transport->url);
721 /* if not appending, truncate FETCH_HEAD */
723 if (!append && !dry_run) {
724 int errcode = truncate_fetch_head();
725 if (errcode)
726 return errcode;
727 }
728 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
730 if (!update_head_ok)
731 check_not_current_branch(ref_map);
732 for (rm = ref_map; rm; rm = rm->next) {
734 if (rm->peer_ref) {
735 peer_item = string_list_lookup(&existing_refs,
736 rm->peer_ref->name);
737 if (peer_item)
738 hashcpy(rm->peer_ref->old_sha1,
739 peer_item->util);
740 }
741 }
742 if (tags == TAGS_DEFAULT && autotags)
744 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
745 if (fetch_refs(transport, ref_map)) {
746 free_refs(ref_map);
747 return 1;
748 }
749 if (prune)
750 prune_refs(transport, ref_map);
751 free_refs(ref_map);
752 /* if neither --no-tags nor --tags was specified, do automated tag
754 * following ... */
755 if (tags == TAGS_DEFAULT && autotags) {
756 struct ref **tail = &ref_map;
757 ref_map = NULL;
758 find_non_local_tags(transport, &ref_map, &tail);
759 if (ref_map) {
760 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
761 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
762 fetch_refs(transport, ref_map);
763 }
764 free_refs(ref_map);
765 }
766 return 0;
768}
769static void set_option(const char *name, const char *value)
771{
772 int r = transport_set_option(transport, name, value);
773 if (r < 0)
774 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
775 name, value, transport->url);
776 if (r > 0)
777 warning(_("Option \"%s\" is ignored for %s\n"),
778 name, transport->url);
779}
780static int get_one_remote_for_fetch(struct remote *remote, void *priv)
782{
783 struct string_list *list = priv;
784 if (!remote->skip_default_update)
785 string_list_append(list, remote->name);
786 return 0;
787}
788struct remote_group_data {
790 const char *name;
791 struct string_list *list;
792};
793static int get_remote_group(const char *key, const char *value, void *priv)
795{
796 struct remote_group_data *g = priv;
797 if (!prefixcmp(key, "remotes.") &&
799 !strcmp(key + 8, g->name)) {
800 /* split list by white space */
801 int space = strcspn(value, " \t\n");
802 while (*value) {
803 if (space > 1) {
804 string_list_append(g->list,
805 xstrndup(value, space));
806 }
807 value += space + (value[space] != '\0');
808 space = strcspn(value, " \t\n");
809 }
810 }
811 return 0;
813}
814static int add_remote_or_group(const char *name, struct string_list *list)
816{
817 int prev_nr = list->nr;
818 struct remote_group_data g;
819 g.name = name; g.list = list;
820 git_config(get_remote_group, &g);
822 if (list->nr == prev_nr) {
823 struct remote *remote;
824 if (!remote_is_configured(name))
825 return 0;
826 remote = remote_get(name);
827 string_list_append(list, remote->name);
828 }
829 return 1;
830}
831static void add_options_to_argv(int *argc, const char **argv)
833{
834 if (dry_run)
835 argv[(*argc)++] = "--dry-run";
836 if (prune)
837 argv[(*argc)++] = "--prune";
838 if (update_head_ok)
839 argv[(*argc)++] = "--update-head-ok";
840 if (force)
841 argv[(*argc)++] = "--force";
842 if (keep)
843 argv[(*argc)++] = "--keep";
844 if (recurse_submodules == RECURSE_SUBMODULES_ON)
845 argv[(*argc)++] = "--recurse-submodules";
846 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
847 argv[(*argc)++] = "--recurse-submodules=on-demand";
848 if (verbosity >= 2)
849 argv[(*argc)++] = "-v";
850 if (verbosity >= 1)
851 argv[(*argc)++] = "-v";
852 else if (verbosity < 0)
853 argv[(*argc)++] = "-q";
854}
856static int fetch_multiple(struct string_list *list)
858{
859 int i, result = 0;
860 const char *argv[12] = { "fetch", "--append" };
861 int argc = 2;
862 add_options_to_argv(&argc, argv);
864 if (!append && !dry_run) {
866 int errcode = truncate_fetch_head();
867 if (errcode)
868 return errcode;
869 }
870 for (i = 0; i < list->nr; i++) {
872 const char *name = list->items[i].string;
873 argv[argc] = name;
874 argv[argc + 1] = NULL;
875 if (verbosity >= 0)
876 printf(_("Fetching %s\n"), name);
877 if (run_command_v_opt(argv, RUN_GIT_CMD)) {
878 error(_("Could not fetch %s"), name);
879 result = 1;
880 }
881 }
882 return result;
884}
885static int fetch_one(struct remote *remote, int argc, const char **argv)
887{
888 int i;
889 static const char **refs = NULL;
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 exit_code = do_fetch(transport,
931 parse_fetch_refspec(ref_nr, refs), ref_nr);
932 transport_disconnect(transport);
933 transport = NULL;
934 return exit_code;
935}
936int cmd_fetch(int argc, const char **argv, const char *prefix)
938{
939 int i;
940 struct string_list list = STRING_LIST_INIT_NODUP;
941 struct remote *remote;
942 int result = 0;
943 packet_trace_identity("fetch");
945 /* Record the command line for the reflog */
947 strbuf_addstr(&default_rla, "fetch");
948 for (i = 1; i < argc; i++)
949 strbuf_addf(&default_rla, " %s", argv[i]);
950 argc = parse_options(argc, argv, prefix,
952 builtin_fetch_options, builtin_fetch_usage, 0);
953 if (all) {
955 if (argc == 1)
956 die(_("fetch --all does not take a repository argument"));
957 else if (argc > 1)
958 die(_("fetch --all does not make sense with refspecs"));
959 (void) for_each_remote(get_one_remote_for_fetch, &list);
960 result = fetch_multiple(&list);
961 } else if (argc == 0) {
962 /* No arguments -- use default remote */
963 remote = remote_get(NULL);
964 result = fetch_one(remote, argc, argv);
965 } else if (multiple) {
966 /* All arguments are assumed to be remotes or groups */
967 for (i = 0; i < argc; i++)
968 if (!add_remote_or_group(argv[i], &list))
969 die(_("No such remote or remote group: %s"), argv[i]);
970 result = fetch_multiple(&list);
971 } else {
972 /* Single remote or group */
973 (void) add_remote_or_group(argv[0], &list);
974 if (list.nr > 1) {
975 /* More than one remote */
976 if (argc > 1)
977 die(_("Fetching a group and specifying refspecs does not make sense"));
978 result = fetch_multiple(&list);
979 } else {
980 /* Zero or one remotes */
981 remote = remote_get(argv[0]);
982 result = fetch_one(remote, argc-1, argv+1);
983 }
984 }
985 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
987 const char *options[10];
988 int num_options = 0;
989 if (recurse_submodules_default) {
990 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
991 set_config_fetch_recurse_submodules(arg);
992 }
993 gitmodules_config();
994 git_config(submodule_config, NULL);
995 add_options_to_argv(&num_options, options);
996 result = fetch_populated_submodules(num_options, options,
997 submodule_prefix,
998 recurse_submodules,
999 verbosity < 0);
1000 }
1001 /* All names were strdup()ed or strndup()ed */
1003 list.strdup_strings = 1;
1004 string_list_clear(&list, 0);
1005 return result;
1007}