7b41a7e388791466cc6c15e55be1bcebb5b3e69f
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 *gtransport;
44static struct transport *gsecondary;
45static const char *submodule_prefix = "";
46static const char *recurse_submodules_default;
47static int option_parse_recurse_submodules(const struct option *opt,
49 const char *arg, int unset)
50{
51 if (unset) {
52 recurse_submodules = RECURSE_SUBMODULES_OFF;
53 } else {
54 if (arg)
55 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
56 else
57 recurse_submodules = RECURSE_SUBMODULES_ON;
58 }
59 return 0;
60}
61static int git_fetch_config(const char *k, const char *v, void *cb)
63{
64 if (!strcmp(k, "fetch.prune")) {
65 fetch_prune_config = git_config_bool(k, v);
66 return 0;
67 }
68 return 0;
69}
70static struct option builtin_fetch_options[] = {
72 OPT__VERBOSITY(&verbosity),
73 OPT_BOOL(0, "all", &all,
74 N_("fetch from all remotes")),
75 OPT_BOOL('a', "append", &append,
76 N_("append to .git/FETCH_HEAD instead of overwriting")),
77 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
78 N_("path to upload pack on remote end")),
79 OPT__FORCE(&force, N_("force overwrite of local branch")),
80 OPT_BOOL('m', "multiple", &multiple,
81 N_("fetch from multiple remotes")),
82 OPT_SET_INT('t', "tags", &tags,
83 N_("fetch all tags and associated objects"), TAGS_SET),
84 OPT_SET_INT('n', NULL, &tags,
85 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
86 OPT_BOOL('p', "prune", &prune,
87 N_("prune remote-tracking branches no longer on remote")),
88 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
89 N_("control recursive fetching of submodules"),
90 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
91 OPT_BOOL(0, "dry-run", &dry_run,
92 N_("dry run")),
93 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
94 OPT_BOOL('u', "update-head-ok", &update_head_ok,
95 N_("allow updating of HEAD ref")),
96 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
97 OPT_STRING(0, "depth", &depth, N_("depth"),
98 N_("deepen history of shallow clone")),
99 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
100 N_("convert to a complete repository"),
101 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
102 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
103 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
104 { OPTION_STRING, 0, "recurse-submodules-default",
105 &recurse_submodules_default, NULL,
106 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
107 OPT_END()
108};
109static void unlock_pack(void)
111{
112 if (gtransport)
113 transport_unlock_pack(gtransport);
114 if (gsecondary)
115 transport_unlock_pack(gsecondary);
116}
117static void unlock_pack_on_signal(int signo)
119{
120 unlock_pack();
121 sigchain_pop(signo);
122 raise(signo);
123}
124static void add_merge_config(struct ref **head,
126 const struct ref *remote_refs,
127 struct branch *branch,
128 struct ref ***tail)
129{
130 int i;
131 for (i = 0; i < branch->merge_nr; i++) {
133 struct ref *rm, **old_tail = *tail;
134 struct refspec refspec;
135 for (rm = *head; rm; rm = rm->next) {
137 if (branch_merge_matches(branch, i, rm->name)) {
138 rm->fetch_head_status = FETCH_HEAD_MERGE;
139 break;
140 }
141 }
142 if (rm)
143 continue;
144 /*
146 * Not fetched to a remote-tracking branch? We need to fetch
147 * it anyway to allow this branch's "branch.$name.merge"
148 * to be honored by 'git pull', but we do not have to
149 * fail if branch.$name.merge is misconfigured to point
150 * at a nonexisting branch. If we were indeed called by
151 * 'git pull', it will notice the misconfiguration because
152 * there is no entry in the resulting FETCH_HEAD marked
153 * for merging.
154 */
155 memset(&refspec, 0, sizeof(refspec));
156 refspec.src = branch->merge[i]->src;
157 get_fetch_map(remote_refs, &refspec, tail, 1);
158 for (rm = *old_tail; rm; rm = rm->next)
159 rm->fetch_head_status = FETCH_HEAD_MERGE;
160 }
161}
162static void find_non_local_tags(struct transport *transport,
164 struct ref **head,
165 struct ref ***tail);
166static struct ref *get_ref_map(struct transport *transport,
168 struct refspec *refs, int ref_count, int tags,
169 int *autotags)
170{
171 int i;
172 struct ref *rm;
173 struct ref *ref_map = NULL;
174 struct ref **tail = &ref_map;
175 const struct ref *remote_refs = transport_get_remote_refs(transport);
177 if (ref_count || tags == TAGS_SET) {
179 struct ref **old_tail;
180 for (i = 0; i < ref_count; i++) {
182 get_fetch_map(remote_refs, &refs[i], &tail, 0);
183 if (refs[i].dst && refs[i].dst[0])
184 *autotags = 1;
185 }
186 /* Merge everything on the command line, but not --tags */
187 for (rm = ref_map; rm; rm = rm->next)
188 rm->fetch_head_status = FETCH_HEAD_MERGE;
189 if (tags == TAGS_SET)
190 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
191 /*
193 * For any refs that we happen to be fetching via command-line
194 * arguments, take the opportunity to update their configured
195 * counterparts. However, we do not want to mention these
196 * entries in FETCH_HEAD at all, as they would simply be
197 * duplicates of existing entries.
198 */
199 old_tail = tail;
200 for (i = 0; i < transport->remote->fetch_refspec_nr; i++)
201 get_fetch_map(ref_map, &transport->remote->fetch[i],
202 &tail, 1);
203 for (rm = *old_tail; rm; rm = rm->next)
204 rm->fetch_head_status = FETCH_HEAD_IGNORE;
205 } else {
206 /* Use the defaults */
207 struct remote *remote = transport->remote;
208 struct branch *branch = branch_get(NULL);
209 int has_merge = branch_has_merge_config(branch);
210 if (remote &&
211 (remote->fetch_refspec_nr ||
212 /* Note: has_merge implies non-NULL branch->remote_name */
213 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
214 for (i = 0; i < remote->fetch_refspec_nr; i++) {
215 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
216 if (remote->fetch[i].dst &&
217 remote->fetch[i].dst[0])
218 *autotags = 1;
219 if (!i && !has_merge && ref_map &&
220 !remote->fetch[0].pattern)
221 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
222 }
223 /*
224 * if the remote we're fetching from is the same
225 * as given in branch.<name>.remote, we add the
226 * ref given in branch.<name>.merge, too.
227 *
228 * Note: has_merge implies non-NULL branch->remote_name
229 */
230 if (has_merge &&
231 !strcmp(branch->remote_name, remote->name))
232 add_merge_config(&ref_map, remote_refs, branch, &tail);
233 } else {
234 ref_map = get_remote_ref(remote_refs, "HEAD");
235 if (!ref_map)
236 die(_("Couldn't find remote ref HEAD"));
237 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
238 tail = &ref_map->next;
239 }
240 }
241 if (tags == TAGS_DEFAULT && *autotags)
242 find_non_local_tags(transport, &ref_map, &tail);
243 ref_remove_duplicates(ref_map);
244 return ref_map;
246}
247#define STORE_REF_ERROR_OTHER 1
249#define STORE_REF_ERROR_DF_CONFLICT 2
250static int s_update_ref(const char *action,
252 struct ref *ref,
253 int check_old)
254{
255 char msg[1024];
256 char *rla = getenv("GIT_REFLOG_ACTION");
257 static struct ref_lock *lock;
258 if (dry_run)
260 return 0;
261 if (!rla)
262 rla = default_rla.buf;
263 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
264 lock = lock_any_ref_for_update(ref->name,
265 check_old ? ref->old_sha1 : NULL,
266 0, NULL);
267 if (!lock)
268 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
269 STORE_REF_ERROR_OTHER;
270 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
271 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
272 STORE_REF_ERROR_OTHER;
273 return 0;
274}
275#define REFCOL_WIDTH 10
277static int update_local_ref(struct ref *ref,
279 const char *remote,
280 const struct ref *remote_ref,
281 struct strbuf *display)
282{
283 struct commit *current = NULL, *updated;
284 enum object_type type;
285 struct branch *current_branch = branch_get(NULL);
286 const char *pretty_ref = prettify_refname(ref->name);
287 type = sha1_object_info(ref->new_sha1, NULL);
289 if (type < 0)
290 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
291 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
293 if (verbosity > 0)
294 strbuf_addf(display, "= %-*s %-*s -> %s",
295 TRANSPORT_SUMMARY(_("[up to date]")),
296 REFCOL_WIDTH, remote, pretty_ref);
297 return 0;
298 }
299 if (current_branch &&
301 !strcmp(ref->name, current_branch->name) &&
302 !(update_head_ok || is_bare_repository()) &&
303 !is_null_sha1(ref->old_sha1)) {
304 /*
305 * If this is the head, and it's not okay to update
306 * the head, and the old value of the head isn't empty...
307 */
308 strbuf_addf(display,
309 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
310 TRANSPORT_SUMMARY(_("[rejected]")),
311 REFCOL_WIDTH, remote, pretty_ref);
312 return 1;
313 }
314 if (!is_null_sha1(ref->old_sha1) &&
316 !prefixcmp(ref->name, "refs/tags/")) {
317 int r;
318 r = s_update_ref("updating tag", ref, 0);
319 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
320 r ? '!' : '-',
321 TRANSPORT_SUMMARY(_("[tag update]")),
322 REFCOL_WIDTH, remote, pretty_ref,
323 r ? _(" (unable to update local ref)") : "");
324 return r;
325 }
326 current = lookup_commit_reference_gently(ref->old_sha1, 1);
328 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
329 if (!current || !updated) {
330 const char *msg;
331 const char *what;
332 int r;
333 /*
334 * Nicely describe the new ref we're fetching.
335 * Base this on the remote's ref name, as it's
336 * more likely to follow a standard layout.
337 */
338 const char *name = remote_ref ? remote_ref->name : "";
339 if (!prefixcmp(name, "refs/tags/")) {
340 msg = "storing tag";
341 what = _("[new tag]");
342 } else if (!prefixcmp(name, "refs/heads/")) {
343 msg = "storing head";
344 what = _("[new branch]");
345 } else {
346 msg = "storing ref";
347 what = _("[new ref]");
348 }
349 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
351 (recurse_submodules != RECURSE_SUBMODULES_ON))
352 check_for_new_submodule_commits(ref->new_sha1);
353 r = s_update_ref(msg, ref, 0);
354 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
355 r ? '!' : '*',
356 TRANSPORT_SUMMARY(what),
357 REFCOL_WIDTH, remote, pretty_ref,
358 r ? _(" (unable to update local ref)") : "");
359 return r;
360 }
361 if (in_merge_bases(current, updated)) {
363 char quickref[83];
364 int r;
365 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
366 strcat(quickref, "..");
367 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
368 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
369 (recurse_submodules != RECURSE_SUBMODULES_ON))
370 check_for_new_submodule_commits(ref->new_sha1);
371 r = s_update_ref("fast-forward", ref, 1);
372 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
373 r ? '!' : ' ',
374 TRANSPORT_SUMMARY_WIDTH, quickref,
375 REFCOL_WIDTH, remote, pretty_ref,
376 r ? _(" (unable to update local ref)") : "");
377 return r;
378 } else if (force || ref->force) {
379 char quickref[84];
380 int r;
381 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
382 strcat(quickref, "...");
383 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
384 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
385 (recurse_submodules != RECURSE_SUBMODULES_ON))
386 check_for_new_submodule_commits(ref->new_sha1);
387 r = s_update_ref("forced-update", ref, 1);
388 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
389 r ? '!' : '+',
390 TRANSPORT_SUMMARY_WIDTH, quickref,
391 REFCOL_WIDTH, remote, pretty_ref,
392 r ? _("unable to update local ref") : _("forced update"));
393 return r;
394 } else {
395 strbuf_addf(display, "! %-*s %-*s -> %s %s",
396 TRANSPORT_SUMMARY(_("[rejected]")),
397 REFCOL_WIDTH, remote, pretty_ref,
398 _("(non-fast-forward)"));
399 return 1;
400 }
401}
402static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
404{
405 struct ref **rm = cb_data;
406 struct ref *ref = *rm;
407 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
409 ref = ref->next;
410 if (!ref)
411 return -1; /* end of the list */
412 *rm = ref->next;
413 hashcpy(sha1, ref->old_sha1);
414 return 0;
415}
416static int store_updated_refs(const char *raw_url, const char *remote_name,
418 struct ref *ref_map)
419{
420 FILE *fp;
421 struct commit *commit;
422 int url_len, i, shown_url = 0, rc = 0;
423 struct strbuf note = STRBUF_INIT;
424 const char *what, *kind;
425 struct ref *rm;
426 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
427 int want_status;
428 fp = fopen(filename, "a");
430 if (!fp)
431 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
432 if (raw_url)
434 url = transport_anonymize_url(raw_url);
435 else
436 url = xstrdup("foreign");
437 rm = ref_map;
439 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
440 rc = error(_("%s did not send all necessary objects\n"), url);
441 goto abort;
442 }
443 /*
445 * We do a pass for each fetch_head_status type in their enum order, so
446 * merged entries are written before not-for-merge. That lets readers
447 * use FETCH_HEAD as a refname to refer to the ref to be merged.
448 */
449 for (want_status = FETCH_HEAD_MERGE;
450 want_status <= FETCH_HEAD_IGNORE;
451 want_status++) {
452 for (rm = ref_map; rm; rm = rm->next) {
453 struct ref *ref = NULL;
454 const char *merge_status_marker = "";
455 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
457 if (want_status == FETCH_HEAD_MERGE)
458 warning(_("reject %s because shallow roots are not allowed to be updated"),
459 rm->peer_ref ? rm->peer_ref->name : rm->name);
460 continue;
461 }
462 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
464 if (!commit)
465 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
466 if (rm->fetch_head_status != want_status)
468 continue;
469 if (rm->peer_ref) {
471 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
472 strcpy(ref->name, rm->peer_ref->name);
473 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
474 hashcpy(ref->new_sha1, rm->old_sha1);
475 ref->force = rm->peer_ref->force;
476 }
477 if (!strcmp(rm->name, "HEAD")) {
480 kind = "";
481 what = "";
482 }
483 else if (!prefixcmp(rm->name, "refs/heads/")) {
484 kind = "branch";
485 what = rm->name + 11;
486 }
487 else if (!prefixcmp(rm->name, "refs/tags/")) {
488 kind = "tag";
489 what = rm->name + 10;
490 }
491 else if (!prefixcmp(rm->name, "refs/remotes/")) {
492 kind = "remote-tracking branch";
493 what = rm->name + 13;
494 }
495 else {
496 kind = "";
497 what = rm->name;
498 }
499 url_len = strlen(url);
501 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
502 ;
503 url_len = i + 1;
504 if (4 < i && !strncmp(".git", url + i - 3, 4))
505 url_len = i - 3;
506 strbuf_reset(¬e);
508 if (*what) {
509 if (*kind)
510 strbuf_addf(¬e, "%s ", kind);
511 strbuf_addf(¬e, "'%s' of ", what);
512 }
513 switch (rm->fetch_head_status) {
514 case FETCH_HEAD_NOT_FOR_MERGE:
515 merge_status_marker = "not-for-merge";
516 /* fall-through */
517 case FETCH_HEAD_MERGE:
518 fprintf(fp, "%s\t%s\t%s",
519 sha1_to_hex(rm->old_sha1),
520 merge_status_marker,
521 note.buf);
522 for (i = 0; i < url_len; ++i)
523 if ('\n' == url[i])
524 fputs("\\n", fp);
525 else
526 fputc(url[i], fp);
527 fputc('\n', fp);
528 break;
529 default:
530 /* do not write anything to FETCH_HEAD */
531 break;
532 }
533 strbuf_reset(¬e);
535 if (ref) {
536 rc |= update_local_ref(ref, what, rm, ¬e);
537 free(ref);
538 } else
539 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
540 TRANSPORT_SUMMARY_WIDTH,
541 *kind ? kind : "branch",
542 REFCOL_WIDTH,
543 *what ? what : "HEAD");
544 if (note.len) {
545 if (verbosity >= 0 && !shown_url) {
546 fprintf(stderr, _("From %.*s\n"),
547 url_len, url);
548 shown_url = 1;
549 }
550 if (verbosity >= 0)
551 fprintf(stderr, " %s\n", note.buf);
552 }
553 }
554 }
555 if (rc & STORE_REF_ERROR_DF_CONFLICT)
557 error(_("some local refs could not be updated; try running\n"
558 " 'git remote prune %s' to remove any old, conflicting "
559 "branches"), remote_name);
560 abort:
562 strbuf_release(¬e);
563 free(url);
564 fclose(fp);
565 return rc;
566}
567/*
569 * We would want to bypass the object transfer altogether if
570 * everything we are going to fetch already exists and is connected
571 * locally.
572 */
573static int quickfetch(struct ref *ref_map)
574{
575 struct ref *rm = ref_map;
576 /*
578 * If we are deepening a shallow clone we already have these
579 * objects reachable. Running rev-list here will return with
580 * a good (0) exit status and we'll bypass the fetch that we
581 * really need to perform. Claiming failure now will ensure
582 * we perform the network exchange to deepen our history.
583 */
584 if (depth)
585 return -1;
586 return check_everything_connected(iterate_ref_map, 1, &rm);
587}
588static int fetch_refs(struct transport *transport, struct ref *ref_map)
590{
591 int ret = quickfetch(ref_map);
592 if (ret)
593 ret = transport_fetch_refs(transport, ref_map);
594 if (!ret)
595 ret |= store_updated_refs(transport->url,
596 transport->remote->name,
597 ref_map);
598 transport_unlock_pack(transport);
599 return ret;
600}
601static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map)
603{
604 int result = 0;
605 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
606 const char *dangling_msg = dry_run
607 ? _(" (%s will become dangling)")
608 : _(" (%s has become dangling)");
609 for (ref = stale_refs; ref; ref = ref->next) {
611 if (!dry_run)
612 result |= delete_ref(ref->name, NULL, 0);
613 if (verbosity >= 0) {
614 fprintf(stderr, " x %-*s %-*s -> %s\n",
615 TRANSPORT_SUMMARY(_("[deleted]")),
616 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
617 warn_dangling_symref(stderr, dangling_msg, ref->name);
618 }
619 }
620 free_refs(stale_refs);
621 return result;
622}
623static int add_existing(const char *refname, const unsigned char *sha1,
625 int flag, void *cbdata)
626{
627 struct string_list *list = (struct string_list *)cbdata;
628 struct string_list_item *item = string_list_insert(list, refname);
629 item->util = xmalloc(20);
630 hashcpy(item->util, sha1);
631 return 0;
632}
633static int will_fetch(struct ref **head, const unsigned char *sha1)
635{
636 struct ref *rm = *head;
637 while (rm) {
638 if (!hashcmp(rm->old_sha1, sha1))
639 return 1;
640 rm = rm->next;
641 }
642 return 0;
643}
644static void find_non_local_tags(struct transport *transport,
646 struct ref **head,
647 struct ref ***tail)
648{
649 struct string_list existing_refs = STRING_LIST_INIT_DUP;
650 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
651 const struct ref *ref;
652 struct string_list_item *item = NULL;
653 for_each_ref(add_existing, &existing_refs);
655 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
656 if (prefixcmp(ref->name, "refs/tags/"))
657 continue;
658 /*
660 * The peeled ref always follows the matching base
661 * ref, so if we see a peeled ref that we don't want
662 * to fetch then we can mark the ref entry in the list
663 * as one to ignore by setting util to NULL.
664 */
665 if (!suffixcmp(ref->name, "^{}")) {
666 if (item && !has_sha1_file(ref->old_sha1) &&
667 !will_fetch(head, ref->old_sha1) &&
668 !has_sha1_file(item->util) &&
669 !will_fetch(head, item->util))
670 item->util = NULL;
671 item = NULL;
672 continue;
673 }
674 /*
676 * If item is non-NULL here, then we previously saw a
677 * ref not followed by a peeled reference, so we need
678 * to check if it is a lightweight tag that we want to
679 * fetch.
680 */
681 if (item && !has_sha1_file(item->util) &&
682 !will_fetch(head, item->util))
683 item->util = NULL;
684 item = NULL;
686 /* skip duplicates and refs that we already have */
688 if (string_list_has_string(&remote_refs, ref->name) ||
689 string_list_has_string(&existing_refs, ref->name))
690 continue;
691 item = string_list_insert(&remote_refs, ref->name);
693 item->util = (void *)ref->old_sha1;
694 }
695 string_list_clear(&existing_refs, 1);
696 /*
698 * We may have a final lightweight tag that needs to be
699 * checked to see if it needs fetching.
700 */
701 if (item && !has_sha1_file(item->util) &&
702 !will_fetch(head, item->util))
703 item->util = NULL;
704 /*
706 * For all the tags in the remote_refs string list,
707 * add them to the list of refs to be fetched
708 */
709 for_each_string_list_item(item, &remote_refs) {
710 /* Unless we have already decided to ignore this item... */
711 if (item->util)
712 {
713 struct ref *rm = alloc_ref(item->string);
714 rm->peer_ref = alloc_ref(item->string);
715 hashcpy(rm->old_sha1, item->util);
716 **tail = rm;
717 *tail = &rm->next;
718 }
719 }
720 string_list_clear(&remote_refs, 0);
722}
723static void check_not_current_branch(struct ref *ref_map)
725{
726 struct branch *current_branch = branch_get(NULL);
727 if (is_bare_repository() || !current_branch)
729 return;
730 for (; ref_map; ref_map = ref_map->next)
732 if (ref_map->peer_ref && !strcmp(current_branch->refname,
733 ref_map->peer_ref->name))
734 die(_("Refusing to fetch into current branch %s "
735 "of non-bare repository"), current_branch->refname);
736}
737static int truncate_fetch_head(void)
739{
740 char *filename = git_path("FETCH_HEAD");
741 FILE *fp = fopen(filename, "w");
742 if (!fp)
744 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
745 fclose(fp);
746 return 0;
747}
748static void set_option(struct transport *transport, const char *name, const char *value)
750{
751 int r = transport_set_option(transport, name, value);
752 if (r < 0)
753 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
754 name, value, transport->url);
755 if (r > 0)
756 warning(_("Option \"%s\" is ignored for %s\n"),
757 name, transport->url);
758}
759static struct transport *prepare_transport(struct remote *remote)
761{
762 struct transport *transport;
763 transport = transport_get(remote, NULL);
764 transport_set_verbosity(transport, verbosity, progress);
765 if (upload_pack)
766 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
767 if (keep)
768 set_option(transport, TRANS_OPT_KEEP, "yes");
769 if (depth)
770 set_option(transport, TRANS_OPT_DEPTH, depth);
771 return transport;
772}
773static void backfill_tags(struct transport *transport, struct ref *ref_map)
775{
776 if (transport->cannot_reuse) {
777 gsecondary = prepare_transport(transport->remote);
778 transport = gsecondary;
779 }
780 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
782 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
783 fetch_refs(transport, ref_map);
784 if (gsecondary) {
786 transport_disconnect(gsecondary);
787 gsecondary = NULL;
788 }
789}
790static int do_fetch(struct transport *transport,
792 struct refspec *refs, int ref_count)
793{
794 struct string_list existing_refs = STRING_LIST_INIT_DUP;
795 struct ref *ref_map;
796 struct ref *rm;
797 int autotags = (transport->remote->fetch_tags == 1);
798 int retcode = 0;
799 for_each_ref(add_existing, &existing_refs);
801 if (tags == TAGS_DEFAULT) {
803 if (transport->remote->fetch_tags == 2)
804 tags = TAGS_SET;
805 if (transport->remote->fetch_tags == -1)
806 tags = TAGS_UNSET;
807 }
808 if (!transport->get_refs_list || !transport->fetch)
810 die(_("Don't know how to fetch from %s"), transport->url);
811 /* if not appending, truncate FETCH_HEAD */
813 if (!append && !dry_run) {
814 retcode = truncate_fetch_head();
815 if (retcode)
816 goto cleanup;
817 }
818 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
820 if (!update_head_ok)
821 check_not_current_branch(ref_map);
822 for (rm = ref_map; rm; rm = rm->next) {
824 if (rm->peer_ref) {
825 struct string_list_item *peer_item =
826 string_list_lookup(&existing_refs,
827 rm->peer_ref->name);
828 if (peer_item)
829 hashcpy(rm->peer_ref->old_sha1,
830 peer_item->util);
831 }
832 }
833 if (tags == TAGS_DEFAULT && autotags)
835 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
836 if (fetch_refs(transport, ref_map)) {
837 free_refs(ref_map);
838 retcode = 1;
839 goto cleanup;
840 }
841 if (prune) {
842 /*
843 * If --tags was specified, pretend that the user gave us
844 * the canonical tags refspec
845 */
846 if (tags == TAGS_SET) {
847 const char *tags_str = "refs/tags/*:refs/tags/*";
848 struct refspec *tags_refspec, *refspec;
849 /* Copy the refspec and add the tags to it */
851 refspec = xcalloc(ref_count + 1, sizeof(struct refspec));
852 tags_refspec = parse_fetch_refspec(1, &tags_str);
853 memcpy(refspec, refs, ref_count * sizeof(struct refspec));
854 memcpy(&refspec[ref_count], tags_refspec, sizeof(struct refspec));
855 ref_count++;
856 prune_refs(refspec, ref_count, ref_map);
858 ref_count--;
860 /* The rest of the strings belong to fetch_one */
861 free_refspec(1, tags_refspec);
862 free(refspec);
863 } else if (ref_count) {
864 prune_refs(refs, ref_count, ref_map);
865 } else {
866 prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map);
867 }
868 }
869 free_refs(ref_map);
870 /* if neither --no-tags nor --tags was specified, do automated tag
872 * following ... */
873 if (tags == TAGS_DEFAULT && autotags) {
874 struct ref **tail = &ref_map;
875 ref_map = NULL;
876 find_non_local_tags(transport, &ref_map, &tail);
877 if (ref_map)
878 backfill_tags(transport, ref_map);
879 free_refs(ref_map);
880 }
881 cleanup:
883 string_list_clear(&existing_refs, 1);
884 return retcode;
885}
886static int get_one_remote_for_fetch(struct remote *remote, void *priv)
888{
889 struct string_list *list = priv;
890 if (!remote->skip_default_update)
891 string_list_append(list, remote->name);
892 return 0;
893}
894struct remote_group_data {
896 const char *name;
897 struct string_list *list;
898};
899static int get_remote_group(const char *key, const char *value, void *priv)
901{
902 struct remote_group_data *g = priv;
903 if (!prefixcmp(key, "remotes.") &&
905 !strcmp(key + 8, g->name)) {
906 /* split list by white space */
907 int space = strcspn(value, " \t\n");
908 while (*value) {
909 if (space > 1) {
910 string_list_append(g->list,
911 xstrndup(value, space));
912 }
913 value += space + (value[space] != '\0');
914 space = strcspn(value, " \t\n");
915 }
916 }
917 return 0;
919}
920static int add_remote_or_group(const char *name, struct string_list *list)
922{
923 int prev_nr = list->nr;
924 struct remote_group_data g;
925 g.name = name; g.list = list;
926 git_config(get_remote_group, &g);
928 if (list->nr == prev_nr) {
929 struct remote *remote;
930 if (!remote_is_configured(name))
931 return 0;
932 remote = remote_get(name);
933 string_list_append(list, remote->name);
934 }
935 return 1;
936}
937static void add_options_to_argv(struct argv_array *argv)
939{
940 if (dry_run)
941 argv_array_push(argv, "--dry-run");
942 if (prune > 0)
943 argv_array_push(argv, "--prune");
944 if (update_head_ok)
945 argv_array_push(argv, "--update-head-ok");
946 if (force)
947 argv_array_push(argv, "--force");
948 if (keep)
949 argv_array_push(argv, "--keep");
950 if (recurse_submodules == RECURSE_SUBMODULES_ON)
951 argv_array_push(argv, "--recurse-submodules");
952 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
953 argv_array_push(argv, "--recurse-submodules=on-demand");
954 if (tags == TAGS_SET)
955 argv_array_push(argv, "--tags");
956 else if (tags == TAGS_UNSET)
957 argv_array_push(argv, "--no-tags");
958 if (verbosity >= 2)
959 argv_array_push(argv, "-v");
960 if (verbosity >= 1)
961 argv_array_push(argv, "-v");
962 else if (verbosity < 0)
963 argv_array_push(argv, "-q");
964}
966static int fetch_multiple(struct string_list *list)
968{
969 int i, result = 0;
970 struct argv_array argv = ARGV_ARRAY_INIT;
971 if (!append && !dry_run) {
973 int errcode = truncate_fetch_head();
974 if (errcode)
975 return errcode;
976 }
977 argv_array_pushl(&argv, "fetch", "--append", NULL);
979 add_options_to_argv(&argv);
980 for (i = 0; i < list->nr; i++) {
982 const char *name = list->items[i].string;
983 argv_array_push(&argv, name);
984 if (verbosity >= 0)
985 printf(_("Fetching %s\n"), name);
986 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
987 error(_("Could not fetch %s"), name);
988 result = 1;
989 }
990 argv_array_pop(&argv);
991 }
992 argv_array_clear(&argv);
994 return result;
995}
996static int fetch_one(struct remote *remote, int argc, const char **argv)
998{
999 int i;
1000 static const char **refs = NULL;
1001 struct refspec *refspec;
1002 int ref_nr = 0;
1003 int exit_code;
1004 if (!remote)
1006 die(_("No remote repository specified. Please, specify either a URL or a\n"
1007 "remote name from which new revisions should be fetched."));
1008 gtransport = prepare_transport(remote);
1010 if (prune < 0) {
1012 /* no command line request */
1013 if (0 <= gtransport->remote->prune)
1014 prune = gtransport->remote->prune;
1015 else if (0 <= fetch_prune_config)
1016 prune = fetch_prune_config;
1017 else
1018 prune = PRUNE_BY_DEFAULT;
1019 }
1020 if (argc > 0) {
1022 int j = 0;
1023 refs = xcalloc(argc + 1, sizeof(const char *));
1024 for (i = 0; i < argc; i++) {
1025 if (!strcmp(argv[i], "tag")) {
1026 char *ref;
1027 i++;
1028 if (i >= argc)
1029 die(_("You need to specify a tag name."));
1030 ref = xmalloc(strlen(argv[i]) * 2 + 22);
1031 strcpy(ref, "refs/tags/");
1032 strcat(ref, argv[i]);
1033 strcat(ref, ":refs/tags/");
1034 strcat(ref, argv[i]);
1035 refs[j++] = ref;
1036 } else
1037 refs[j++] = argv[i];
1038 }
1039 refs[j] = NULL;
1040 ref_nr = j;
1041 }
1042 sigchain_push_common(unlock_pack_on_signal);
1044 atexit(unlock_pack);
1045 refspec = parse_fetch_refspec(ref_nr, refs);
1046 exit_code = do_fetch(gtransport, refspec, ref_nr);
1047 free_refspec(ref_nr, refspec);
1048 transport_disconnect(gtransport);
1049 gtransport = NULL;
1050 return exit_code;
1051}
1052int cmd_fetch(int argc, const char **argv, const char *prefix)
1054{
1055 int i;
1056 struct string_list list = STRING_LIST_INIT_NODUP;
1057 struct remote *remote;
1058 int result = 0;
1059 static const char *argv_gc_auto[] = {
1060 "gc", "--auto", NULL,
1061 };
1062 packet_trace_identity("fetch");
1064 /* Record the command line for the reflog */
1066 strbuf_addstr(&default_rla, "fetch");
1067 for (i = 1; i < argc; i++)
1068 strbuf_addf(&default_rla, " %s", argv[i]);
1069 git_config(git_fetch_config, NULL);
1071 argc = parse_options(argc, argv, prefix,
1073 builtin_fetch_options, builtin_fetch_usage, 0);
1074 if (unshallow) {
1076 if (depth)
1077 die(_("--depth and --unshallow cannot be used together"));
1078 else if (!is_repository_shallow())
1079 die(_("--unshallow on a complete repository does not make sense"));
1080 else {
1081 static char inf_depth[12];
1082 sprintf(inf_depth, "%d", INFINITE_DEPTH);
1083 depth = inf_depth;
1084 }
1085 }
1086 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1088 if (recurse_submodules_default) {
1089 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1090 set_config_fetch_recurse_submodules(arg);
1091 }
1092 gitmodules_config();
1093 git_config(submodule_config, NULL);
1094 }
1095 if (all) {
1097 if (argc == 1)
1098 die(_("fetch --all does not take a repository argument"));
1099 else if (argc > 1)
1100 die(_("fetch --all does not make sense with refspecs"));
1101 (void) for_each_remote(get_one_remote_for_fetch, &list);
1102 result = fetch_multiple(&list);
1103 } else if (argc == 0) {
1104 /* No arguments -- use default remote */
1105 remote = remote_get(NULL);
1106 result = fetch_one(remote, argc, argv);
1107 } else if (multiple) {
1108 /* All arguments are assumed to be remotes or groups */
1109 for (i = 0; i < argc; i++)
1110 if (!add_remote_or_group(argv[i], &list))
1111 die(_("No such remote or remote group: %s"), argv[i]);
1112 result = fetch_multiple(&list);
1113 } else {
1114 /* Single remote or group */
1115 (void) add_remote_or_group(argv[0], &list);
1116 if (list.nr > 1) {
1117 /* More than one remote */
1118 if (argc > 1)
1119 die(_("Fetching a group and specifying refspecs does not make sense"));
1120 result = fetch_multiple(&list);
1121 } else {
1122 /* Zero or one remotes */
1123 remote = remote_get(argv[0]);
1124 result = fetch_one(remote, argc-1, argv+1);
1125 }
1126 }
1127 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1129 struct argv_array options = ARGV_ARRAY_INIT;
1130 add_options_to_argv(&options);
1132 result = fetch_populated_submodules(&options,
1133 submodule_prefix,
1134 recurse_submodules,
1135 verbosity < 0);
1136 argv_array_clear(&options);
1137 }
1138 /* All names were strdup()ed or strndup()ed */
1140 list.strdup_strings = 1;
1141 string_list_clear(&list, 0);
1142 run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1144 return result;
1146}