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"
18static 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
25};
26enum {
28 TAGS_UNSET = 0,
29 TAGS_DEFAULT = 1,
30 TAGS_SET = 2
31};
32static int fetch_prune_config = -1; /* unspecified */
34static int prune = -1; /* unspecified */
35#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
36static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity;
38static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
39static int tags = TAGS_DEFAULT, unshallow;
40static const char *depth;
41static const char *upload_pack;
42static struct strbuf default_rla = STRBUF_INIT;
43static struct transport *transport;
44static const char *submodule_prefix = "";
45static const char *recurse_submodules_default;
46static int option_parse_recurse_submodules(const struct option *opt,
48 const char *arg, int unset)
49{
50 if (unset) {
51 recurse_submodules = RECURSE_SUBMODULES_OFF;
52 } else {
53 if (arg)
54 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
55 else
56 recurse_submodules = RECURSE_SUBMODULES_ON;
57 }
58 return 0;
59}
60static int git_fetch_config(const char *k, const char *v, void *cb)
62{
63 if (!strcmp(k, "fetch.prune")) {
64 fetch_prune_config = git_config_bool(k, v);
65 return 0;
66 }
67 return 0;
68}
69static struct option builtin_fetch_options[] = {
71 OPT__VERBOSITY(&verbosity),
72 OPT_BOOL(0, "all", &all,
73 N_("fetch from all remotes")),
74 OPT_BOOL('a', "append", &append,
75 N_("append to .git/FETCH_HEAD instead of overwriting")),
76 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
77 N_("path to upload pack on remote end")),
78 OPT__FORCE(&force, N_("force overwrite of local branch")),
79 OPT_BOOL('m', "multiple", &multiple,
80 N_("fetch from multiple remotes")),
81 OPT_SET_INT('t', "tags", &tags,
82 N_("fetch all tags and associated objects"), TAGS_SET),
83 OPT_SET_INT('n', NULL, &tags,
84 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
85 OPT_BOOL('p', "prune", &prune,
86 N_("prune remote-tracking branches no longer on remote")),
87 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
88 N_("control recursive fetching of submodules"),
89 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
90 OPT_BOOL(0, "dry-run", &dry_run,
91 N_("dry run")),
92 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
93 OPT_BOOL('u', "update-head-ok", &update_head_ok,
94 N_("allow updating of HEAD ref")),
95 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
96 OPT_STRING(0, "depth", &depth, N_("depth"),
97 N_("deepen history of shallow clone")),
98 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
99 N_("convert to a complete repository"),
100 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
101 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
102 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
103 { OPTION_STRING, 0, "recurse-submodules-default",
104 &recurse_submodules_default, NULL,
105 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
106 OPT_END()
107};
108static void unlock_pack(void)
110{
111 if (transport)
112 transport_unlock_pack(transport);
113}
114static void unlock_pack_on_signal(int signo)
116{
117 unlock_pack();
118 sigchain_pop(signo);
119 raise(signo);
120}
121static void add_merge_config(struct ref **head,
123 const struct ref *remote_refs,
124 struct branch *branch,
125 struct ref ***tail)
126{
127 int i;
128 for (i = 0; i < branch->merge_nr; i++) {
130 struct ref *rm, **old_tail = *tail;
131 struct refspec refspec;
132 for (rm = *head; rm; rm = rm->next) {
134 if (branch_merge_matches(branch, i, rm->name)) {
135 rm->fetch_head_status = FETCH_HEAD_MERGE;
136 break;
137 }
138 }
139 if (rm)
140 continue;
141 /*
143 * Not fetched to a remote-tracking branch? We need to fetch
144 * it anyway to allow this branch's "branch.$name.merge"
145 * to be honored by 'git pull', but we do not have to
146 * fail if branch.$name.merge is misconfigured to point
147 * at a nonexisting branch. If we were indeed called by
148 * 'git pull', it will notice the misconfiguration because
149 * there is no entry in the resulting FETCH_HEAD marked
150 * for merging.
151 */
152 memset(&refspec, 0, sizeof(refspec));
153 refspec.src = branch->merge[i]->src;
154 get_fetch_map(remote_refs, &refspec, tail, 1);
155 for (rm = *old_tail; rm; rm = rm->next)
156 rm->fetch_head_status = FETCH_HEAD_MERGE;
157 }
158}
159static void find_non_local_tags(struct transport *transport,
161 struct ref **head,
162 struct ref ***tail);
163static struct ref *get_ref_map(struct transport *transport,
165 struct refspec *refs, int ref_count, int tags,
166 int *autotags)
167{
168 int i;
169 struct ref *rm;
170 struct ref *ref_map = NULL;
171 struct ref **tail = &ref_map;
172 const struct ref *remote_refs = transport_get_remote_refs(transport);
174 if (ref_count || tags == TAGS_SET) {
176 struct ref **old_tail;
177 for (i = 0; i < ref_count; i++) {
179 get_fetch_map(remote_refs, &refs[i], &tail, 0);
180 if (refs[i].dst && refs[i].dst[0])
181 *autotags = 1;
182 }
183 /* Merge everything on the command line, but not --tags */
184 for (rm = ref_map; rm; rm = rm->next)
185 rm->fetch_head_status = FETCH_HEAD_MERGE;
186 if (tags == TAGS_SET)
187 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
188 /*
190 * For any refs that we happen to be fetching via command-line
191 * arguments, take the opportunity to update their configured
192 * counterparts. However, we do not want to mention these
193 * entries in FETCH_HEAD at all, as they would simply be
194 * duplicates of existing entries.
195 */
196 old_tail = tail;
197 for (i = 0; i < transport->remote->fetch_refspec_nr; i++)
198 get_fetch_map(ref_map, &transport->remote->fetch[i],
199 &tail, 1);
200 for (rm = *old_tail; rm; rm = rm->next)
201 rm->fetch_head_status = FETCH_HEAD_IGNORE;
202 } else {
203 /* Use the defaults */
204 struct remote *remote = transport->remote;
205 struct branch *branch = branch_get(NULL);
206 int has_merge = branch_has_merge_config(branch);
207 if (remote &&
208 (remote->fetch_refspec_nr ||
209 /* Note: has_merge implies non-NULL branch->remote_name */
210 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
211 for (i = 0; i < remote->fetch_refspec_nr; i++) {
212 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
213 if (remote->fetch[i].dst &&
214 remote->fetch[i].dst[0])
215 *autotags = 1;
216 if (!i && !has_merge && ref_map &&
217 !remote->fetch[0].pattern)
218 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
219 }
220 /*
221 * if the remote we're fetching from is the same
222 * as given in branch.<name>.remote, we add the
223 * ref given in branch.<name>.merge, too.
224 *
225 * Note: has_merge implies non-NULL branch->remote_name
226 */
227 if (has_merge &&
228 !strcmp(branch->remote_name, remote->name))
229 add_merge_config(&ref_map, remote_refs, branch, &tail);
230 } else {
231 ref_map = get_remote_ref(remote_refs, "HEAD");
232 if (!ref_map)
233 die(_("Couldn't find remote ref HEAD"));
234 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
235 tail = &ref_map->next;
236 }
237 }
238 if (tags == TAGS_DEFAULT && *autotags)
239 find_non_local_tags(transport, &ref_map, &tail);
240 ref_remove_duplicates(ref_map);
241 return ref_map;
243}
244#define STORE_REF_ERROR_OTHER 1
246#define STORE_REF_ERROR_DF_CONFLICT 2
247static int s_update_ref(const char *action,
249 struct ref *ref,
250 int check_old)
251{
252 char msg[1024];
253 char *rla = getenv("GIT_REFLOG_ACTION");
254 static struct ref_lock *lock;
255 if (dry_run)
257 return 0;
258 if (!rla)
259 rla = default_rla.buf;
260 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
261 lock = lock_any_ref_for_update(ref->name,
262 check_old ? ref->old_sha1 : NULL, 0);
263 if (!lock)
264 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
265 STORE_REF_ERROR_OTHER;
266 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
267 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
268 STORE_REF_ERROR_OTHER;
269 return 0;
270}
271#define REFCOL_WIDTH 10
273static int update_local_ref(struct ref *ref,
275 const char *remote,
276 const struct ref *remote_ref,
277 struct strbuf *display)
278{
279 struct commit *current = NULL, *updated;
280 enum object_type type;
281 struct branch *current_branch = branch_get(NULL);
282 const char *pretty_ref = prettify_refname(ref->name);
283 type = sha1_object_info(ref->new_sha1, NULL);
285 if (type < 0)
286 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
287 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
289 if (verbosity > 0)
290 strbuf_addf(display, "= %-*s %-*s -> %s",
291 TRANSPORT_SUMMARY(_("[up to date]")),
292 REFCOL_WIDTH, remote, pretty_ref);
293 return 0;
294 }
295 if (current_branch &&
297 !strcmp(ref->name, current_branch->name) &&
298 !(update_head_ok || is_bare_repository()) &&
299 !is_null_sha1(ref->old_sha1)) {
300 /*
301 * If this is the head, and it's not okay to update
302 * the head, and the old value of the head isn't empty...
303 */
304 strbuf_addf(display,
305 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
306 TRANSPORT_SUMMARY(_("[rejected]")),
307 REFCOL_WIDTH, remote, pretty_ref);
308 return 1;
309 }
310 if (!is_null_sha1(ref->old_sha1) &&
312 !prefixcmp(ref->name, "refs/tags/")) {
313 int r;
314 r = s_update_ref("updating tag", ref, 0);
315 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
316 r ? '!' : '-',
317 TRANSPORT_SUMMARY(_("[tag update]")),
318 REFCOL_WIDTH, remote, pretty_ref,
319 r ? _(" (unable to update local ref)") : "");
320 return r;
321 }
322 current = lookup_commit_reference_gently(ref->old_sha1, 1);
324 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
325 if (!current || !updated) {
326 const char *msg;
327 const char *what;
328 int r;
329 /*
330 * Nicely describe the new ref we're fetching.
331 * Base this on the remote's ref name, as it's
332 * more likely to follow a standard layout.
333 */
334 const char *name = remote_ref ? remote_ref->name : "";
335 if (!prefixcmp(name, "refs/tags/")) {
336 msg = "storing tag";
337 what = _("[new tag]");
338 } else if (!prefixcmp(name, "refs/heads/")) {
339 msg = "storing head";
340 what = _("[new branch]");
341 } else {
342 msg = "storing ref";
343 what = _("[new ref]");
344 }
345 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
347 (recurse_submodules != RECURSE_SUBMODULES_ON))
348 check_for_new_submodule_commits(ref->new_sha1);
349 r = s_update_ref(msg, ref, 0);
350 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
351 r ? '!' : '*',
352 TRANSPORT_SUMMARY(what),
353 REFCOL_WIDTH, remote, pretty_ref,
354 r ? _(" (unable to update local ref)") : "");
355 return r;
356 }
357 if (in_merge_bases(current, updated)) {
359 char quickref[83];
360 int r;
361 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
362 strcat(quickref, "..");
363 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
364 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
365 (recurse_submodules != RECURSE_SUBMODULES_ON))
366 check_for_new_submodule_commits(ref->new_sha1);
367 r = s_update_ref("fast-forward", ref, 1);
368 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
369 r ? '!' : ' ',
370 TRANSPORT_SUMMARY_WIDTH, quickref,
371 REFCOL_WIDTH, remote, pretty_ref,
372 r ? _(" (unable to update local ref)") : "");
373 return r;
374 } else if (force || ref->force) {
375 char quickref[84];
376 int r;
377 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
378 strcat(quickref, "...");
379 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
380 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
381 (recurse_submodules != RECURSE_SUBMODULES_ON))
382 check_for_new_submodule_commits(ref->new_sha1);
383 r = s_update_ref("forced-update", ref, 1);
384 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
385 r ? '!' : '+',
386 TRANSPORT_SUMMARY_WIDTH, quickref,
387 REFCOL_WIDTH, remote, pretty_ref,
388 r ? _("unable to update local ref") : _("forced update"));
389 return r;
390 } else {
391 strbuf_addf(display, "! %-*s %-*s -> %s %s",
392 TRANSPORT_SUMMARY(_("[rejected]")),
393 REFCOL_WIDTH, remote, pretty_ref,
394 _("(non-fast-forward)"));
395 return 1;
396 }
397}
398static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
400{
401 struct ref **rm = cb_data;
402 struct ref *ref = *rm;
403 if (!ref)
405 return -1; /* end of the list */
406 *rm = ref->next;
407 hashcpy(sha1, ref->old_sha1);
408 return 0;
409}
410static int store_updated_refs(const char *raw_url, const char *remote_name,
412 struct ref *ref_map)
413{
414 FILE *fp;
415 struct commit *commit;
416 int url_len, i, shown_url = 0, rc = 0;
417 struct strbuf note = STRBUF_INIT;
418 const char *what, *kind;
419 struct ref *rm;
420 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
421 int want_status;
422 fp = fopen(filename, "a");
424 if (!fp)
425 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
426 if (raw_url)
428 url = transport_anonymize_url(raw_url);
429 else
430 url = xstrdup("foreign");
431 rm = ref_map;
433 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
434 rc = error(_("%s did not send all necessary objects\n"), url);
435 goto abort;
436 }
437 /*
439 * We do a pass for each fetch_head_status type in their enum order, so
440 * merged entries are written before not-for-merge. That lets readers
441 * use FETCH_HEAD as a refname to refer to the ref to be merged.
442 */
443 for (want_status = FETCH_HEAD_MERGE;
444 want_status <= FETCH_HEAD_IGNORE;
445 want_status++) {
446 for (rm = ref_map; rm; rm = rm->next) {
447 struct ref *ref = NULL;
448 const char *merge_status_marker = "";
449 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
451 if (!commit)
452 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
453 if (rm->fetch_head_status != want_status)
455 continue;
456 if (rm->peer_ref) {
458 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
459 strcpy(ref->name, rm->peer_ref->name);
460 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
461 hashcpy(ref->new_sha1, rm->old_sha1);
462 ref->force = rm->peer_ref->force;
463 }
464 if (!strcmp(rm->name, "HEAD")) {
467 kind = "";
468 what = "";
469 }
470 else if (!prefixcmp(rm->name, "refs/heads/")) {
471 kind = "branch";
472 what = rm->name + 11;
473 }
474 else if (!prefixcmp(rm->name, "refs/tags/")) {
475 kind = "tag";
476 what = rm->name + 10;
477 }
478 else if (!prefixcmp(rm->name, "refs/remotes/")) {
479 kind = "remote-tracking branch";
480 what = rm->name + 13;
481 }
482 else {
483 kind = "";
484 what = rm->name;
485 }
486 url_len = strlen(url);
488 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
489 ;
490 url_len = i + 1;
491 if (4 < i && !strncmp(".git", url + i - 3, 4))
492 url_len = i - 3;
493 strbuf_reset(¬e);
495 if (*what) {
496 if (*kind)
497 strbuf_addf(¬e, "%s ", kind);
498 strbuf_addf(¬e, "'%s' of ", what);
499 }
500 switch (rm->fetch_head_status) {
501 case FETCH_HEAD_NOT_FOR_MERGE:
502 merge_status_marker = "not-for-merge";
503 /* fall-through */
504 case FETCH_HEAD_MERGE:
505 fprintf(fp, "%s\t%s\t%s",
506 sha1_to_hex(rm->old_sha1),
507 merge_status_marker,
508 note.buf);
509 for (i = 0; i < url_len; ++i)
510 if ('\n' == url[i])
511 fputs("\\n", fp);
512 else
513 fputc(url[i], fp);
514 fputc('\n', fp);
515 break;
516 default:
517 /* do not write anything to FETCH_HEAD */
518 break;
519 }
520 strbuf_reset(¬e);
522 if (ref) {
523 rc |= update_local_ref(ref, what, rm, ¬e);
524 free(ref);
525 } else
526 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
527 TRANSPORT_SUMMARY_WIDTH,
528 *kind ? kind : "branch",
529 REFCOL_WIDTH,
530 *what ? what : "HEAD");
531 if (note.len) {
532 if (verbosity >= 0 && !shown_url) {
533 fprintf(stderr, _("From %.*s\n"),
534 url_len, url);
535 shown_url = 1;
536 }
537 if (verbosity >= 0)
538 fprintf(stderr, " %s\n", note.buf);
539 }
540 }
541 }
542 if (rc & STORE_REF_ERROR_DF_CONFLICT)
544 error(_("some local refs could not be updated; try running\n"
545 " 'git remote prune %s' to remove any old, conflicting "
546 "branches"), remote_name);
547 abort:
549 strbuf_release(¬e);
550 free(url);
551 fclose(fp);
552 return rc;
553}
554/*
556 * We would want to bypass the object transfer altogether if
557 * everything we are going to fetch already exists and is connected
558 * locally.
559 */
560static int quickfetch(struct ref *ref_map)
561{
562 struct ref *rm = ref_map;
563 /*
565 * If we are deepening a shallow clone we already have these
566 * objects reachable. Running rev-list here will return with
567 * a good (0) exit status and we'll bypass the fetch that we
568 * really need to perform. Claiming failure now will ensure
569 * we perform the network exchange to deepen our history.
570 */
571 if (depth)
572 return -1;
573 return check_everything_connected(iterate_ref_map, 1, &rm);
574}
575static int fetch_refs(struct transport *transport, struct ref *ref_map)
577{
578 int ret = quickfetch(ref_map);
579 if (ret)
580 ret = transport_fetch_refs(transport, ref_map);
581 if (!ret)
582 ret |= store_updated_refs(transport->url,
583 transport->remote->name,
584 ref_map);
585 transport_unlock_pack(transport);
586 return ret;
587}
588static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map)
590{
591 int result = 0;
592 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
593 const char *dangling_msg = dry_run
594 ? _(" (%s will become dangling)")
595 : _(" (%s has become dangling)");
596 for (ref = stale_refs; ref; ref = ref->next) {
598 if (!dry_run)
599 result |= delete_ref(ref->name, NULL, 0);
600 if (verbosity >= 0) {
601 fprintf(stderr, " x %-*s %-*s -> %s\n",
602 TRANSPORT_SUMMARY(_("[deleted]")),
603 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
604 warn_dangling_symref(stderr, dangling_msg, ref->name);
605 }
606 }
607 free_refs(stale_refs);
608 return result;
609}
610static int add_existing(const char *refname, const unsigned char *sha1,
612 int flag, void *cbdata)
613{
614 struct string_list *list = (struct string_list *)cbdata;
615 struct string_list_item *item = string_list_insert(list, refname);
616 item->util = xmalloc(20);
617 hashcpy(item->util, sha1);
618 return 0;
619}
620static int will_fetch(struct ref **head, const unsigned char *sha1)
622{
623 struct ref *rm = *head;
624 while (rm) {
625 if (!hashcmp(rm->old_sha1, sha1))
626 return 1;
627 rm = rm->next;
628 }
629 return 0;
630}
631static void find_non_local_tags(struct transport *transport,
633 struct ref **head,
634 struct ref ***tail)
635{
636 struct string_list existing_refs = STRING_LIST_INIT_DUP;
637 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
638 const struct ref *ref;
639 struct string_list_item *item = NULL;
640 for_each_ref(add_existing, &existing_refs);
642 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
643 if (prefixcmp(ref->name, "refs/tags/"))
644 continue;
645 /*
647 * The peeled ref always follows the matching base
648 * ref, so if we see a peeled ref that we don't want
649 * to fetch then we can mark the ref entry in the list
650 * as one to ignore by setting util to NULL.
651 */
652 if (!suffixcmp(ref->name, "^{}")) {
653 if (item && !has_sha1_file(ref->old_sha1) &&
654 !will_fetch(head, ref->old_sha1) &&
655 !has_sha1_file(item->util) &&
656 !will_fetch(head, item->util))
657 item->util = NULL;
658 item = NULL;
659 continue;
660 }
661 /*
663 * If item is non-NULL here, then we previously saw a
664 * ref not followed by a peeled reference, so we need
665 * to check if it is a lightweight tag that we want to
666 * fetch.
667 */
668 if (item && !has_sha1_file(item->util) &&
669 !will_fetch(head, item->util))
670 item->util = NULL;
671 item = NULL;
673 /* skip duplicates and refs that we already have */
675 if (string_list_has_string(&remote_refs, ref->name) ||
676 string_list_has_string(&existing_refs, ref->name))
677 continue;
678 item = string_list_insert(&remote_refs, ref->name);
680 item->util = (void *)ref->old_sha1;
681 }
682 string_list_clear(&existing_refs, 1);
683 /*
685 * We may have a final lightweight tag that needs to be
686 * checked to see if it needs fetching.
687 */
688 if (item && !has_sha1_file(item->util) &&
689 !will_fetch(head, item->util))
690 item->util = NULL;
691 /*
693 * For all the tags in the remote_refs string list,
694 * add them to the list of refs to be fetched
695 */
696 for_each_string_list_item(item, &remote_refs) {
697 /* Unless we have already decided to ignore this item... */
698 if (item->util)
699 {
700 struct ref *rm = alloc_ref(item->string);
701 rm->peer_ref = alloc_ref(item->string);
702 hashcpy(rm->old_sha1, item->util);
703 **tail = rm;
704 *tail = &rm->next;
705 }
706 }
707 string_list_clear(&remote_refs, 0);
709}
710static void check_not_current_branch(struct ref *ref_map)
712{
713 struct branch *current_branch = branch_get(NULL);
714 if (is_bare_repository() || !current_branch)
716 return;
717 for (; ref_map; ref_map = ref_map->next)
719 if (ref_map->peer_ref && !strcmp(current_branch->refname,
720 ref_map->peer_ref->name))
721 die(_("Refusing to fetch into current branch %s "
722 "of non-bare repository"), current_branch->refname);
723}
724static int truncate_fetch_head(void)
726{
727 char *filename = git_path("FETCH_HEAD");
728 FILE *fp = fopen(filename, "w");
729 if (!fp)
731 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
732 fclose(fp);
733 return 0;
734}
735static int do_fetch(struct transport *transport,
737 struct refspec *refs, int ref_count)
738{
739 struct string_list existing_refs = STRING_LIST_INIT_DUP;
740 struct ref *ref_map;
741 struct ref *rm;
742 int autotags = (transport->remote->fetch_tags == 1);
743 int retcode = 0;
744 for_each_ref(add_existing, &existing_refs);
746 if (tags == TAGS_DEFAULT) {
748 if (transport->remote->fetch_tags == 2)
749 tags = TAGS_SET;
750 if (transport->remote->fetch_tags == -1)
751 tags = TAGS_UNSET;
752 }
753 if (!transport->get_refs_list || !transport->fetch)
755 die(_("Don't know how to fetch from %s"), transport->url);
756 /* if not appending, truncate FETCH_HEAD */
758 if (!append && !dry_run) {
759 retcode = truncate_fetch_head();
760 if (retcode)
761 goto cleanup;
762 }
763 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
765 if (!update_head_ok)
766 check_not_current_branch(ref_map);
767 for (rm = ref_map; rm; rm = rm->next) {
769 if (rm->peer_ref) {
770 struct string_list_item *peer_item =
771 string_list_lookup(&existing_refs,
772 rm->peer_ref->name);
773 if (peer_item)
774 hashcpy(rm->peer_ref->old_sha1,
775 peer_item->util);
776 }
777 }
778 if (tags == TAGS_DEFAULT && autotags)
780 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
781 if (fetch_refs(transport, ref_map)) {
782 free_refs(ref_map);
783 retcode = 1;
784 goto cleanup;
785 }
786 if (prune) {
787 /*
788 * If --tags was specified, pretend that the user gave us
789 * the canonical tags refspec
790 */
791 if (tags == TAGS_SET) {
792 const char *tags_str = "refs/tags/*:refs/tags/*";
793 struct refspec *tags_refspec, *refspec;
794 /* Copy the refspec and add the tags to it */
796 refspec = xcalloc(ref_count + 1, sizeof(struct refspec));
797 tags_refspec = parse_fetch_refspec(1, &tags_str);
798 memcpy(refspec, refs, ref_count * sizeof(struct refspec));
799 memcpy(&refspec[ref_count], tags_refspec, sizeof(struct refspec));
800 ref_count++;
801 prune_refs(refspec, ref_count, ref_map);
803 ref_count--;
805 /* The rest of the strings belong to fetch_one */
806 free_refspec(1, tags_refspec);
807 free(refspec);
808 } else if (ref_count) {
809 prune_refs(refs, ref_count, ref_map);
810 } else {
811 prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map);
812 }
813 }
814 free_refs(ref_map);
815 /* if neither --no-tags nor --tags was specified, do automated tag
817 * following ... */
818 if (tags == TAGS_DEFAULT && autotags) {
819 struct ref **tail = &ref_map;
820 ref_map = NULL;
821 find_non_local_tags(transport, &ref_map, &tail);
822 if (ref_map) {
823 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
824 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
825 fetch_refs(transport, ref_map);
826 }
827 free_refs(ref_map);
828 }
829 cleanup:
831 string_list_clear(&existing_refs, 1);
832 return retcode;
833}
834static void set_option(const char *name, const char *value)
836{
837 int r = transport_set_option(transport, name, value);
838 if (r < 0)
839 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
840 name, value, transport->url);
841 if (r > 0)
842 warning(_("Option \"%s\" is ignored for %s\n"),
843 name, transport->url);
844}
845static int get_one_remote_for_fetch(struct remote *remote, void *priv)
847{
848 struct string_list *list = priv;
849 if (!remote->skip_default_update)
850 string_list_append(list, remote->name);
851 return 0;
852}
853struct remote_group_data {
855 const char *name;
856 struct string_list *list;
857};
858static int get_remote_group(const char *key, const char *value, void *priv)
860{
861 struct remote_group_data *g = priv;
862 if (!prefixcmp(key, "remotes.") &&
864 !strcmp(key + 8, g->name)) {
865 /* split list by white space */
866 int space = strcspn(value, " \t\n");
867 while (*value) {
868 if (space > 1) {
869 string_list_append(g->list,
870 xstrndup(value, space));
871 }
872 value += space + (value[space] != '\0');
873 space = strcspn(value, " \t\n");
874 }
875 }
876 return 0;
878}
879static int add_remote_or_group(const char *name, struct string_list *list)
881{
882 int prev_nr = list->nr;
883 struct remote_group_data g;
884 g.name = name; g.list = list;
885 git_config(get_remote_group, &g);
887 if (list->nr == prev_nr) {
888 struct remote *remote;
889 if (!remote_is_configured(name))
890 return 0;
891 remote = remote_get(name);
892 string_list_append(list, remote->name);
893 }
894 return 1;
895}
896static void add_options_to_argv(struct argv_array *argv)
898{
899 if (dry_run)
900 argv_array_push(argv, "--dry-run");
901 if (prune > 0)
902 argv_array_push(argv, "--prune");
903 if (update_head_ok)
904 argv_array_push(argv, "--update-head-ok");
905 if (force)
906 argv_array_push(argv, "--force");
907 if (keep)
908 argv_array_push(argv, "--keep");
909 if (recurse_submodules == RECURSE_SUBMODULES_ON)
910 argv_array_push(argv, "--recurse-submodules");
911 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
912 argv_array_push(argv, "--recurse-submodules=on-demand");
913 if (tags == TAGS_SET)
914 argv_array_push(argv, "--tags");
915 else if (tags == TAGS_UNSET)
916 argv_array_push(argv, "--no-tags");
917 if (verbosity >= 2)
918 argv_array_push(argv, "-v");
919 if (verbosity >= 1)
920 argv_array_push(argv, "-v");
921 else if (verbosity < 0)
922 argv_array_push(argv, "-q");
923}
925static int fetch_multiple(struct string_list *list)
927{
928 int i, result = 0;
929 struct argv_array argv = ARGV_ARRAY_INIT;
930 if (!append && !dry_run) {
932 int errcode = truncate_fetch_head();
933 if (errcode)
934 return errcode;
935 }
936 argv_array_pushl(&argv, "fetch", "--append", NULL);
938 add_options_to_argv(&argv);
939 for (i = 0; i < list->nr; i++) {
941 const char *name = list->items[i].string;
942 argv_array_push(&argv, name);
943 if (verbosity >= 0)
944 printf(_("Fetching %s\n"), name);
945 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
946 error(_("Could not fetch %s"), name);
947 result = 1;
948 }
949 argv_array_pop(&argv);
950 }
951 argv_array_clear(&argv);
953 return result;
954}
955static int fetch_one(struct remote *remote, int argc, const char **argv)
957{
958 int i;
959 static const char **refs = NULL;
960 struct refspec *refspec;
961 int ref_nr = 0;
962 int exit_code;
963 if (!remote)
965 die(_("No remote repository specified. Please, specify either a URL or a\n"
966 "remote name from which new revisions should be fetched."));
967 transport = transport_get(remote, NULL);
969 if (prune < 0) {
971 /* no command line request */
972 if (0 <= transport->remote->prune)
973 prune = transport->remote->prune;
974 else if (0 <= fetch_prune_config)
975 prune = fetch_prune_config;
976 else
977 prune = PRUNE_BY_DEFAULT;
978 }
979 transport_set_verbosity(transport, verbosity, progress);
981 if (upload_pack)
982 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
983 if (keep)
984 set_option(TRANS_OPT_KEEP, "yes");
985 if (depth)
986 set_option(TRANS_OPT_DEPTH, depth);
987 if (argc > 0) {
989 int j = 0;
990 refs = xcalloc(argc + 1, sizeof(const char *));
991 for (i = 0; i < argc; i++) {
992 if (!strcmp(argv[i], "tag")) {
993 char *ref;
994 i++;
995 if (i >= argc)
996 die(_("You need to specify a tag name."));
997 ref = xmalloc(strlen(argv[i]) * 2 + 22);
998 strcpy(ref, "refs/tags/");
999 strcat(ref, argv[i]);
1000 strcat(ref, ":refs/tags/");
1001 strcat(ref, argv[i]);
1002 refs[j++] = ref;
1003 } else
1004 refs[j++] = argv[i];
1005 }
1006 refs[j] = NULL;
1007 ref_nr = j;
1008 }
1009 sigchain_push_common(unlock_pack_on_signal);
1011 atexit(unlock_pack);
1012 refspec = parse_fetch_refspec(ref_nr, refs);
1013 exit_code = do_fetch(transport, refspec, ref_nr);
1014 free_refspec(ref_nr, refspec);
1015 transport_disconnect(transport);
1016 transport = NULL;
1017 return exit_code;
1018}
1019int cmd_fetch(int argc, const char **argv, const char *prefix)
1021{
1022 int i;
1023 struct string_list list = STRING_LIST_INIT_NODUP;
1024 struct remote *remote;
1025 int result = 0;
1026 static const char *argv_gc_auto[] = {
1027 "gc", "--auto", NULL,
1028 };
1029 packet_trace_identity("fetch");
1031 /* Record the command line for the reflog */
1033 strbuf_addstr(&default_rla, "fetch");
1034 for (i = 1; i < argc; i++)
1035 strbuf_addf(&default_rla, " %s", argv[i]);
1036 git_config(git_fetch_config, NULL);
1038 argc = parse_options(argc, argv, prefix,
1040 builtin_fetch_options, builtin_fetch_usage, 0);
1041 if (unshallow) {
1043 if (depth)
1044 die(_("--depth and --unshallow cannot be used together"));
1045 else if (!is_repository_shallow())
1046 die(_("--unshallow on a complete repository does not make sense"));
1047 else {
1048 static char inf_depth[12];
1049 sprintf(inf_depth, "%d", INFINITE_DEPTH);
1050 depth = inf_depth;
1051 }
1052 }
1053 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1055 if (recurse_submodules_default) {
1056 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1057 set_config_fetch_recurse_submodules(arg);
1058 }
1059 gitmodules_config();
1060 git_config(submodule_config, NULL);
1061 }
1062 if (all) {
1064 if (argc == 1)
1065 die(_("fetch --all does not take a repository argument"));
1066 else if (argc > 1)
1067 die(_("fetch --all does not make sense with refspecs"));
1068 (void) for_each_remote(get_one_remote_for_fetch, &list);
1069 result = fetch_multiple(&list);
1070 } else if (argc == 0) {
1071 /* No arguments -- use default remote */
1072 remote = remote_get(NULL);
1073 result = fetch_one(remote, argc, argv);
1074 } else if (multiple) {
1075 /* All arguments are assumed to be remotes or groups */
1076 for (i = 0; i < argc; i++)
1077 if (!add_remote_or_group(argv[i], &list))
1078 die(_("No such remote or remote group: %s"), argv[i]);
1079 result = fetch_multiple(&list);
1080 } else {
1081 /* Single remote or group */
1082 (void) add_remote_or_group(argv[0], &list);
1083 if (list.nr > 1) {
1084 /* More than one remote */
1085 if (argc > 1)
1086 die(_("Fetching a group and specifying refspecs does not make sense"));
1087 result = fetch_multiple(&list);
1088 } else {
1089 /* Zero or one remotes */
1090 remote = remote_get(argv[0]);
1091 result = fetch_one(remote, argc-1, argv+1);
1092 }
1093 }
1094 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1096 struct argv_array options = ARGV_ARRAY_INIT;
1097 add_options_to_argv(&options);
1099 result = fetch_populated_submodules(&options,
1100 submodule_prefix,
1101 recurse_submodules,
1102 verbosity < 0);
1103 argv_array_clear(&options);
1104 }
1105 /* All names were strdup()ed or strndup()ed */
1107 list.strdup_strings = 1;
1108 string_list_clear(&list, 0);
1109 run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1111 return result;
1113}