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, update_shallow;
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 shown_url = 0;
48static int refmap_alloc, refmap_nr;
49static const char **refmap_array;
50static int option_parse_recurse_submodules(const struct option *opt,
52 const char *arg, int unset)
53{
54 if (unset) {
55 recurse_submodules = RECURSE_SUBMODULES_OFF;
56 } else {
57 if (arg)
58 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
59 else
60 recurse_submodules = RECURSE_SUBMODULES_ON;
61 }
62 return 0;
63}
64static int git_fetch_config(const char *k, const char *v, void *cb)
66{
67 if (!strcmp(k, "fetch.prune")) {
68 fetch_prune_config = git_config_bool(k, v);
69 return 0;
70 }
71 return git_default_config(k, v, cb);
72}
73static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
75{
76 ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
77 /*
79 * "git fetch --refmap='' origin foo"
80 * can be used to tell the command not to store anywhere
81 */
82 if (*arg)
83 refmap_array[refmap_nr++] = arg;
84 return 0;
85}
86static struct option builtin_fetch_options[] = {
88 OPT__VERBOSITY(&verbosity),
89 OPT_BOOL(0, "all", &all,
90 N_("fetch from all remotes")),
91 OPT_BOOL('a', "append", &append,
92 N_("append to .git/FETCH_HEAD instead of overwriting")),
93 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
94 N_("path to upload pack on remote end")),
95 OPT__FORCE(&force, N_("force overwrite of local branch")),
96 OPT_BOOL('m', "multiple", &multiple,
97 N_("fetch from multiple remotes")),
98 OPT_SET_INT('t', "tags", &tags,
99 N_("fetch all tags and associated objects"), TAGS_SET),
100 OPT_SET_INT('n', NULL, &tags,
101 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
102 OPT_BOOL('p', "prune", &prune,
103 N_("prune remote-tracking branches no longer on remote")),
104 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
105 N_("control recursive fetching of submodules"),
106 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
107 OPT_BOOL(0, "dry-run", &dry_run,
108 N_("dry run")),
109 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
110 OPT_BOOL('u', "update-head-ok", &update_head_ok,
111 N_("allow updating of HEAD ref")),
112 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
113 OPT_STRING(0, "depth", &depth, N_("depth"),
114 N_("deepen history of shallow clone")),
115 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
116 N_("convert to a complete repository"),
117 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
118 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
119 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
120 { OPTION_STRING, 0, "recurse-submodules-default",
121 &recurse_submodules_default, NULL,
122 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
123 OPT_BOOL(0, "update-shallow", &update_shallow,
124 N_("accept refs that update .git/shallow")),
125 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
126 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
127 OPT_END()
128};
129static void unlock_pack(void)
131{
132 if (gtransport)
133 transport_unlock_pack(gtransport);
134 if (gsecondary)
135 transport_unlock_pack(gsecondary);
136}
137static void unlock_pack_on_signal(int signo)
139{
140 unlock_pack();
141 sigchain_pop(signo);
142 raise(signo);
143}
144static void add_merge_config(struct ref **head,
146 const struct ref *remote_refs,
147 struct branch *branch,
148 struct ref ***tail)
149{
150 int i;
151 for (i = 0; i < branch->merge_nr; i++) {
153 struct ref *rm, **old_tail = *tail;
154 struct refspec refspec;
155 for (rm = *head; rm; rm = rm->next) {
157 if (branch_merge_matches(branch, i, rm->name)) {
158 rm->fetch_head_status = FETCH_HEAD_MERGE;
159 break;
160 }
161 }
162 if (rm)
163 continue;
164 /*
166 * Not fetched to a remote-tracking branch? We need to fetch
167 * it anyway to allow this branch's "branch.$name.merge"
168 * to be honored by 'git pull', but we do not have to
169 * fail if branch.$name.merge is misconfigured to point
170 * at a nonexisting branch. If we were indeed called by
171 * 'git pull', it will notice the misconfiguration because
172 * there is no entry in the resulting FETCH_HEAD marked
173 * for merging.
174 */
175 memset(&refspec, 0, sizeof(refspec));
176 refspec.src = branch->merge[i]->src;
177 get_fetch_map(remote_refs, &refspec, tail, 1);
178 for (rm = *old_tail; rm; rm = rm->next)
179 rm->fetch_head_status = FETCH_HEAD_MERGE;
180 }
181}
182static int add_existing(const char *refname, const unsigned char *sha1,
184 int flag, void *cbdata)
185{
186 struct string_list *list = (struct string_list *)cbdata;
187 struct string_list_item *item = string_list_insert(list, refname);
188 item->util = xmalloc(20);
189 hashcpy(item->util, sha1);
190 return 0;
191}
192static int will_fetch(struct ref **head, const unsigned char *sha1)
194{
195 struct ref *rm = *head;
196 while (rm) {
197 if (!hashcmp(rm->old_sha1, sha1))
198 return 1;
199 rm = rm->next;
200 }
201 return 0;
202}
203static void find_non_local_tags(struct transport *transport,
205 struct ref **head,
206 struct ref ***tail)
207{
208 struct string_list existing_refs = STRING_LIST_INIT_DUP;
209 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
210 const struct ref *ref;
211 struct string_list_item *item = NULL;
212 for_each_ref(add_existing, &existing_refs);
214 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
215 if (!starts_with(ref->name, "refs/tags/"))
216 continue;
217 /*
219 * The peeled ref always follows the matching base
220 * ref, so if we see a peeled ref that we don't want
221 * to fetch then we can mark the ref entry in the list
222 * as one to ignore by setting util to NULL.
223 */
224 if (ends_with(ref->name, "^{}")) {
225 if (item && !has_sha1_file(ref->old_sha1) &&
226 !will_fetch(head, ref->old_sha1) &&
227 !has_sha1_file(item->util) &&
228 !will_fetch(head, item->util))
229 item->util = NULL;
230 item = NULL;
231 continue;
232 }
233 /*
235 * If item is non-NULL here, then we previously saw a
236 * ref not followed by a peeled reference, so we need
237 * to check if it is a lightweight tag that we want to
238 * fetch.
239 */
240 if (item && !has_sha1_file(item->util) &&
241 !will_fetch(head, item->util))
242 item->util = NULL;
243 item = NULL;
245 /* skip duplicates and refs that we already have */
247 if (string_list_has_string(&remote_refs, ref->name) ||
248 string_list_has_string(&existing_refs, ref->name))
249 continue;
250 item = string_list_insert(&remote_refs, ref->name);
252 item->util = (void *)ref->old_sha1;
253 }
254 string_list_clear(&existing_refs, 1);
255 /*
257 * We may have a final lightweight tag that needs to be
258 * checked to see if it needs fetching.
259 */
260 if (item && !has_sha1_file(item->util) &&
261 !will_fetch(head, item->util))
262 item->util = NULL;
263 /*
265 * For all the tags in the remote_refs string list,
266 * add them to the list of refs to be fetched
267 */
268 for_each_string_list_item(item, &remote_refs) {
269 /* Unless we have already decided to ignore this item... */
270 if (item->util)
271 {
272 struct ref *rm = alloc_ref(item->string);
273 rm->peer_ref = alloc_ref(item->string);
274 hashcpy(rm->old_sha1, item->util);
275 **tail = rm;
276 *tail = &rm->next;
277 }
278 }
279 string_list_clear(&remote_refs, 0);
281}
282static struct ref *get_ref_map(struct transport *transport,
284 struct refspec *refspecs, int refspec_count,
285 int tags, int *autotags)
286{
287 int i;
288 struct ref *rm;
289 struct ref *ref_map = NULL;
290 struct ref **tail = &ref_map;
291 /* opportunistically-updated references: */
293 struct ref *orefs = NULL, **oref_tail = &orefs;
294 const struct ref *remote_refs = transport_get_remote_refs(transport);
296 if (refspec_count) {
298 struct refspec *fetch_refspec;
299 int fetch_refspec_nr;
300 for (i = 0; i < refspec_count; i++) {
302 get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
303 if (refspecs[i].dst && refspecs[i].dst[0])
304 *autotags = 1;
305 }
306 /* Merge everything on the command line (but not --tags) */
307 for (rm = ref_map; rm; rm = rm->next)
308 rm->fetch_head_status = FETCH_HEAD_MERGE;
309 /*
311 * For any refs that we happen to be fetching via
312 * command-line arguments, the destination ref might
313 * have been missing or have been different than the
314 * remote-tracking ref that would be derived from the
315 * configured refspec. In these cases, we want to
316 * take the opportunity to update their configured
317 * remote-tracking reference. However, we do not want
318 * to mention these entries in FETCH_HEAD at all, as
319 * they would simply be duplicates of existing
320 * entries, so we set them FETCH_HEAD_IGNORE below.
321 *
322 * We compute these entries now, based only on the
323 * refspecs specified on the command line. But we add
324 * them to the list following the refspecs resulting
325 * from the tags option so that one of the latter,
326 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
327 * by ref_remove_duplicates() in favor of one of these
328 * opportunistic entries with FETCH_HEAD_IGNORE.
329 */
330 if (refmap_array) {
331 fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
332 fetch_refspec_nr = refmap_nr;
333 } else {
334 fetch_refspec = transport->remote->fetch;
335 fetch_refspec_nr = transport->remote->fetch_refspec_nr;
336 }
337 for (i = 0; i < fetch_refspec_nr; i++)
339 get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
340 if (tags == TAGS_SET)
342 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
343 } else if (refmap_array) {
344 die("--refmap option is only meaningful with command-line refspec(s).");
345 } else {
346 /* Use the defaults */
347 struct remote *remote = transport->remote;
348 struct branch *branch = branch_get(NULL);
349 int has_merge = branch_has_merge_config(branch);
350 if (remote &&
351 (remote->fetch_refspec_nr ||
352 /* Note: has_merge implies non-NULL branch->remote_name */
353 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
354 for (i = 0; i < remote->fetch_refspec_nr; i++) {
355 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
356 if (remote->fetch[i].dst &&
357 remote->fetch[i].dst[0])
358 *autotags = 1;
359 if (!i && !has_merge && ref_map &&
360 !remote->fetch[0].pattern)
361 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
362 }
363 /*
364 * if the remote we're fetching from is the same
365 * as given in branch.<name>.remote, we add the
366 * ref given in branch.<name>.merge, too.
367 *
368 * Note: has_merge implies non-NULL branch->remote_name
369 */
370 if (has_merge &&
371 !strcmp(branch->remote_name, remote->name))
372 add_merge_config(&ref_map, remote_refs, branch, &tail);
373 } else {
374 ref_map = get_remote_ref(remote_refs, "HEAD");
375 if (!ref_map)
376 die(_("Couldn't find remote ref HEAD"));
377 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
378 tail = &ref_map->next;
379 }
380 }
381 if (tags == TAGS_SET)
383 /* also fetch all tags */
384 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
385 else if (tags == TAGS_DEFAULT && *autotags)
386 find_non_local_tags(transport, &ref_map, &tail);
387 /* Now append any refs to be updated opportunistically: */
389 *tail = orefs;
390 for (rm = orefs; rm; rm = rm->next) {
391 rm->fetch_head_status = FETCH_HEAD_IGNORE;
392 tail = &rm->next;
393 }
394 return ref_remove_duplicates(ref_map);
396}
397#define STORE_REF_ERROR_OTHER 1
399#define STORE_REF_ERROR_DF_CONFLICT 2
400static int s_update_ref(const char *action,
402 struct ref *ref,
403 int check_old)
404{
405 char msg[1024];
406 char *rla = getenv("GIT_REFLOG_ACTION");
407 struct ref_transaction *transaction;
408 struct strbuf err = STRBUF_INIT;
409 int ret, df_conflict = 0;
410 if (dry_run)
412 return 0;
413 if (!rla)
414 rla = default_rla.buf;
415 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
416 transaction = ref_transaction_begin(&err);
418 if (!transaction ||
419 ref_transaction_update(transaction, ref->name, ref->new_sha1,
420 ref->old_sha1, 0, check_old, msg, &err))
421 goto fail;
422 ret = ref_transaction_commit(transaction, &err);
424 if (ret) {
425 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
426 goto fail;
427 }
428 ref_transaction_free(transaction);
430 strbuf_release(&err);
431 return 0;
432fail:
433 ref_transaction_free(transaction);
434 error("%s", err.buf);
435 strbuf_release(&err);
436 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
437 : STORE_REF_ERROR_OTHER;
438}
439#define REFCOL_WIDTH 10
441static int update_local_ref(struct ref *ref,
443 const char *remote,
444 const struct ref *remote_ref,
445 struct strbuf *display)
446{
447 struct commit *current = NULL, *updated;
448 enum object_type type;
449 struct branch *current_branch = branch_get(NULL);
450 const char *pretty_ref = prettify_refname(ref->name);
451 type = sha1_object_info(ref->new_sha1, NULL);
453 if (type < 0)
454 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
455 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
457 if (verbosity > 0)
458 strbuf_addf(display, "= %-*s %-*s -> %s",
459 TRANSPORT_SUMMARY(_("[up to date]")),
460 REFCOL_WIDTH, remote, pretty_ref);
461 return 0;
462 }
463 if (current_branch &&
465 !strcmp(ref->name, current_branch->name) &&
466 !(update_head_ok || is_bare_repository()) &&
467 !is_null_sha1(ref->old_sha1)) {
468 /*
469 * If this is the head, and it's not okay to update
470 * the head, and the old value of the head isn't empty...
471 */
472 strbuf_addf(display,
473 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
474 TRANSPORT_SUMMARY(_("[rejected]")),
475 REFCOL_WIDTH, remote, pretty_ref);
476 return 1;
477 }
478 if (!is_null_sha1(ref->old_sha1) &&
480 starts_with(ref->name, "refs/tags/")) {
481 int r;
482 r = s_update_ref("updating tag", ref, 0);
483 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
484 r ? '!' : '-',
485 TRANSPORT_SUMMARY(_("[tag update]")),
486 REFCOL_WIDTH, remote, pretty_ref,
487 r ? _(" (unable to update local ref)") : "");
488 return r;
489 }
490 current = lookup_commit_reference_gently(ref->old_sha1, 1);
492 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
493 if (!current || !updated) {
494 const char *msg;
495 const char *what;
496 int r;
497 /*
498 * Nicely describe the new ref we're fetching.
499 * Base this on the remote's ref name, as it's
500 * more likely to follow a standard layout.
501 */
502 const char *name = remote_ref ? remote_ref->name : "";
503 if (starts_with(name, "refs/tags/")) {
504 msg = "storing tag";
505 what = _("[new tag]");
506 } else if (starts_with(name, "refs/heads/")) {
507 msg = "storing head";
508 what = _("[new branch]");
509 } else {
510 msg = "storing ref";
511 what = _("[new ref]");
512 }
513 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
515 (recurse_submodules != RECURSE_SUBMODULES_ON))
516 check_for_new_submodule_commits(ref->new_sha1);
517 r = s_update_ref(msg, ref, 0);
518 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
519 r ? '!' : '*',
520 TRANSPORT_SUMMARY(what),
521 REFCOL_WIDTH, remote, pretty_ref,
522 r ? _(" (unable to update local ref)") : "");
523 return r;
524 }
525 if (in_merge_bases(current, updated)) {
527 char quickref[83];
528 int r;
529 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
530 strcat(quickref, "..");
531 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
532 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
533 (recurse_submodules != RECURSE_SUBMODULES_ON))
534 check_for_new_submodule_commits(ref->new_sha1);
535 r = s_update_ref("fast-forward", ref, 1);
536 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
537 r ? '!' : ' ',
538 TRANSPORT_SUMMARY_WIDTH, quickref,
539 REFCOL_WIDTH, remote, pretty_ref,
540 r ? _(" (unable to update local ref)") : "");
541 return r;
542 } else if (force || ref->force) {
543 char quickref[84];
544 int r;
545 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
546 strcat(quickref, "...");
547 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
548 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
549 (recurse_submodules != RECURSE_SUBMODULES_ON))
550 check_for_new_submodule_commits(ref->new_sha1);
551 r = s_update_ref("forced-update", ref, 1);
552 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
553 r ? '!' : '+',
554 TRANSPORT_SUMMARY_WIDTH, quickref,
555 REFCOL_WIDTH, remote, pretty_ref,
556 r ? _("unable to update local ref") : _("forced update"));
557 return r;
558 } else {
559 strbuf_addf(display, "! %-*s %-*s -> %s %s",
560 TRANSPORT_SUMMARY(_("[rejected]")),
561 REFCOL_WIDTH, remote, pretty_ref,
562 _("(non-fast-forward)"));
563 return 1;
564 }
565}
566static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
568{
569 struct ref **rm = cb_data;
570 struct ref *ref = *rm;
571 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
573 ref = ref->next;
574 if (!ref)
575 return -1; /* end of the list */
576 *rm = ref->next;
577 hashcpy(sha1, ref->old_sha1);
578 return 0;
579}
580static int store_updated_refs(const char *raw_url, const char *remote_name,
582 struct ref *ref_map)
583{
584 FILE *fp;
585 struct commit *commit;
586 int url_len, i, rc = 0;
587 struct strbuf note = STRBUF_INIT;
588 const char *what, *kind;
589 struct ref *rm;
590 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
591 int want_status;
592 fp = fopen(filename, "a");
594 if (!fp)
595 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
596 if (raw_url)
598 url = transport_anonymize_url(raw_url);
599 else
600 url = xstrdup("foreign");
601 rm = ref_map;
603 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
604 rc = error(_("%s did not send all necessary objects\n"), url);
605 goto abort;
606 }
607 /*
609 * We do a pass for each fetch_head_status type in their enum order, so
610 * merged entries are written before not-for-merge. That lets readers
611 * use FETCH_HEAD as a refname to refer to the ref to be merged.
612 */
613 for (want_status = FETCH_HEAD_MERGE;
614 want_status <= FETCH_HEAD_IGNORE;
615 want_status++) {
616 for (rm = ref_map; rm; rm = rm->next) {
617 struct ref *ref = NULL;
618 const char *merge_status_marker = "";
619 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
621 if (want_status == FETCH_HEAD_MERGE)
622 warning(_("reject %s because shallow roots are not allowed to be updated"),
623 rm->peer_ref ? rm->peer_ref->name : rm->name);
624 continue;
625 }
626 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
628 if (!commit)
629 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
630 if (rm->fetch_head_status != want_status)
632 continue;
633 if (rm->peer_ref) {
635 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
636 strcpy(ref->name, rm->peer_ref->name);
637 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
638 hashcpy(ref->new_sha1, rm->old_sha1);
639 ref->force = rm->peer_ref->force;
640 }
641 if (!strcmp(rm->name, "HEAD")) {
644 kind = "";
645 what = "";
646 }
647 else if (starts_with(rm->name, "refs/heads/")) {
648 kind = "branch";
649 what = rm->name + 11;
650 }
651 else if (starts_with(rm->name, "refs/tags/")) {
652 kind = "tag";
653 what = rm->name + 10;
654 }
655 else if (starts_with(rm->name, "refs/remotes/")) {
656 kind = "remote-tracking branch";
657 what = rm->name + 13;
658 }
659 else {
660 kind = "";
661 what = rm->name;
662 }
663 url_len = strlen(url);
665 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
666 ;
667 url_len = i + 1;
668 if (4 < i && !strncmp(".git", url + i - 3, 4))
669 url_len = i - 3;
670 strbuf_reset(¬e);
672 if (*what) {
673 if (*kind)
674 strbuf_addf(¬e, "%s ", kind);
675 strbuf_addf(¬e, "'%s' of ", what);
676 }
677 switch (rm->fetch_head_status) {
678 case FETCH_HEAD_NOT_FOR_MERGE:
679 merge_status_marker = "not-for-merge";
680 /* fall-through */
681 case FETCH_HEAD_MERGE:
682 fprintf(fp, "%s\t%s\t%s",
683 sha1_to_hex(rm->old_sha1),
684 merge_status_marker,
685 note.buf);
686 for (i = 0; i < url_len; ++i)
687 if ('\n' == url[i])
688 fputs("\\n", fp);
689 else
690 fputc(url[i], fp);
691 fputc('\n', fp);
692 break;
693 default:
694 /* do not write anything to FETCH_HEAD */
695 break;
696 }
697 strbuf_reset(¬e);
699 if (ref) {
700 rc |= update_local_ref(ref, what, rm, ¬e);
701 free(ref);
702 } else
703 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
704 TRANSPORT_SUMMARY_WIDTH,
705 *kind ? kind : "branch",
706 REFCOL_WIDTH,
707 *what ? what : "HEAD");
708 if (note.len) {
709 if (verbosity >= 0 && !shown_url) {
710 fprintf(stderr, _("From %.*s\n"),
711 url_len, url);
712 shown_url = 1;
713 }
714 if (verbosity >= 0)
715 fprintf(stderr, " %s\n", note.buf);
716 }
717 }
718 }
719 if (rc & STORE_REF_ERROR_DF_CONFLICT)
721 error(_("some local refs could not be updated; try running\n"
722 " 'git remote prune %s' to remove any old, conflicting "
723 "branches"), remote_name);
724 abort:
726 strbuf_release(¬e);
727 free(url);
728 fclose(fp);
729 return rc;
730}
731/*
733 * We would want to bypass the object transfer altogether if
734 * everything we are going to fetch already exists and is connected
735 * locally.
736 */
737static int quickfetch(struct ref *ref_map)
738{
739 struct ref *rm = ref_map;
740 /*
742 * If we are deepening a shallow clone we already have these
743 * objects reachable. Running rev-list here will return with
744 * a good (0) exit status and we'll bypass the fetch that we
745 * really need to perform. Claiming failure now will ensure
746 * we perform the network exchange to deepen our history.
747 */
748 if (depth)
749 return -1;
750 return check_everything_connected(iterate_ref_map, 1, &rm);
751}
752static int fetch_refs(struct transport *transport, struct ref *ref_map)
754{
755 int ret = quickfetch(ref_map);
756 if (ret)
757 ret = transport_fetch_refs(transport, ref_map);
758 if (!ret)
759 ret |= store_updated_refs(transport->url,
760 transport->remote->name,
761 ref_map);
762 transport_unlock_pack(transport);
763 return ret;
764}
765static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
767 const char *raw_url)
768{
769 int url_len, i, result = 0;
770 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
771 char *url;
772 const char *dangling_msg = dry_run
773 ? _(" (%s will become dangling)")
774 : _(" (%s has become dangling)");
775 if (raw_url)
777 url = transport_anonymize_url(raw_url);
778 else
779 url = xstrdup("foreign");
780 url_len = strlen(url);
782 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
783 ;
784 url_len = i + 1;
786 if (4 < i && !strncmp(".git", url + i - 3, 4))
787 url_len = i - 3;
788 for (ref = stale_refs; ref; ref = ref->next) {
790 if (!dry_run)
791 result |= delete_ref(ref->name, NULL, 0);
792 if (verbosity >= 0 && !shown_url) {
793 fprintf(stderr, _("From %.*s\n"), url_len, url);
794 shown_url = 1;
795 }
796 if (verbosity >= 0) {
797 fprintf(stderr, " x %-*s %-*s -> %s\n",
798 TRANSPORT_SUMMARY(_("[deleted]")),
799 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
800 warn_dangling_symref(stderr, dangling_msg, ref->name);
801 }
802 }
803 free(url);
804 free_refs(stale_refs);
805 return result;
806}
807static void check_not_current_branch(struct ref *ref_map)
809{
810 struct branch *current_branch = branch_get(NULL);
811 if (is_bare_repository() || !current_branch)
813 return;
814 for (; ref_map; ref_map = ref_map->next)
816 if (ref_map->peer_ref && !strcmp(current_branch->refname,
817 ref_map->peer_ref->name))
818 die(_("Refusing to fetch into current branch %s "
819 "of non-bare repository"), current_branch->refname);
820}
821static int truncate_fetch_head(void)
823{
824 char *filename = git_path("FETCH_HEAD");
825 FILE *fp = fopen(filename, "w");
826 if (!fp)
828 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
829 fclose(fp);
830 return 0;
831}
832static void set_option(struct transport *transport, const char *name, const char *value)
834{
835 int r = transport_set_option(transport, name, value);
836 if (r < 0)
837 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
838 name, value, transport->url);
839 if (r > 0)
840 warning(_("Option \"%s\" is ignored for %s\n"),
841 name, transport->url);
842}
843static struct transport *prepare_transport(struct remote *remote)
845{
846 struct transport *transport;
847 transport = transport_get(remote, NULL);
848 transport_set_verbosity(transport, verbosity, progress);
849 if (upload_pack)
850 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
851 if (keep)
852 set_option(transport, TRANS_OPT_KEEP, "yes");
853 if (depth)
854 set_option(transport, TRANS_OPT_DEPTH, depth);
855 if (update_shallow)
856 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
857 return transport;
858}
859static void backfill_tags(struct transport *transport, struct ref *ref_map)
861{
862 if (transport->cannot_reuse) {
863 gsecondary = prepare_transport(transport->remote);
864 transport = gsecondary;
865 }
866 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
868 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
869 fetch_refs(transport, ref_map);
870 if (gsecondary) {
872 transport_disconnect(gsecondary);
873 gsecondary = NULL;
874 }
875}
876static int do_fetch(struct transport *transport,
878 struct refspec *refs, int ref_count)
879{
880 struct string_list existing_refs = STRING_LIST_INIT_DUP;
881 struct ref *ref_map;
882 struct ref *rm;
883 int autotags = (transport->remote->fetch_tags == 1);
884 int retcode = 0;
885 for_each_ref(add_existing, &existing_refs);
887 if (tags == TAGS_DEFAULT) {
889 if (transport->remote->fetch_tags == 2)
890 tags = TAGS_SET;
891 if (transport->remote->fetch_tags == -1)
892 tags = TAGS_UNSET;
893 }
894 if (!transport->get_refs_list || !transport->fetch)
896 die(_("Don't know how to fetch from %s"), transport->url);
897 /* if not appending, truncate FETCH_HEAD */
899 if (!append && !dry_run) {
900 retcode = truncate_fetch_head();
901 if (retcode)
902 goto cleanup;
903 }
904 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
906 if (!update_head_ok)
907 check_not_current_branch(ref_map);
908 for (rm = ref_map; rm; rm = rm->next) {
910 if (rm->peer_ref) {
911 struct string_list_item *peer_item =
912 string_list_lookup(&existing_refs,
913 rm->peer_ref->name);
914 if (peer_item)
915 hashcpy(rm->peer_ref->old_sha1,
916 peer_item->util);
917 }
918 }
919 if (tags == TAGS_DEFAULT && autotags)
921 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
922 if (prune) {
923 /*
924 * We only prune based on refspecs specified
925 * explicitly (via command line or configuration); we
926 * don't care whether --tags was specified.
927 */
928 if (ref_count) {
929 prune_refs(refs, ref_count, ref_map, transport->url);
930 } else {
931 prune_refs(transport->remote->fetch,
932 transport->remote->fetch_refspec_nr,
933 ref_map,
934 transport->url);
935 }
936 }
937 if (fetch_refs(transport, ref_map)) {
938 free_refs(ref_map);
939 retcode = 1;
940 goto cleanup;
941 }
942 free_refs(ref_map);
943 /* if neither --no-tags nor --tags was specified, do automated tag
945 * following ... */
946 if (tags == TAGS_DEFAULT && autotags) {
947 struct ref **tail = &ref_map;
948 ref_map = NULL;
949 find_non_local_tags(transport, &ref_map, &tail);
950 if (ref_map)
951 backfill_tags(transport, ref_map);
952 free_refs(ref_map);
953 }
954 cleanup:
956 string_list_clear(&existing_refs, 1);
957 return retcode;
958}
959static int get_one_remote_for_fetch(struct remote *remote, void *priv)
961{
962 struct string_list *list = priv;
963 if (!remote->skip_default_update)
964 string_list_append(list, remote->name);
965 return 0;
966}
967struct remote_group_data {
969 const char *name;
970 struct string_list *list;
971};
972static int get_remote_group(const char *key, const char *value, void *priv)
974{
975 struct remote_group_data *g = priv;
976 if (starts_with(key, "remotes.") &&
978 !strcmp(key + 8, g->name)) {
979 /* split list by white space */
980 int space = strcspn(value, " \t\n");
981 while (*value) {
982 if (space > 1) {
983 string_list_append(g->list,
984 xstrndup(value, space));
985 }
986 value += space + (value[space] != '\0');
987 space = strcspn(value, " \t\n");
988 }
989 }
990 return 0;
992}
993static int add_remote_or_group(const char *name, struct string_list *list)
995{
996 int prev_nr = list->nr;
997 struct remote_group_data g;
998 g.name = name; g.list = list;
999 git_config(get_remote_group, &g);
1001 if (list->nr == prev_nr) {
1002 struct remote *remote;
1003 if (!remote_is_configured(name))
1004 return 0;
1005 remote = remote_get(name);
1006 string_list_append(list, remote->name);
1007 }
1008 return 1;
1009}
1010static void add_options_to_argv(struct argv_array *argv)
1012{
1013 if (dry_run)
1014 argv_array_push(argv, "--dry-run");
1015 if (prune != -1)
1016 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1017 if (update_head_ok)
1018 argv_array_push(argv, "--update-head-ok");
1019 if (force)
1020 argv_array_push(argv, "--force");
1021 if (keep)
1022 argv_array_push(argv, "--keep");
1023 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1024 argv_array_push(argv, "--recurse-submodules");
1025 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1026 argv_array_push(argv, "--recurse-submodules=on-demand");
1027 if (tags == TAGS_SET)
1028 argv_array_push(argv, "--tags");
1029 else if (tags == TAGS_UNSET)
1030 argv_array_push(argv, "--no-tags");
1031 if (verbosity >= 2)
1032 argv_array_push(argv, "-v");
1033 if (verbosity >= 1)
1034 argv_array_push(argv, "-v");
1035 else if (verbosity < 0)
1036 argv_array_push(argv, "-q");
1037}
1039static int fetch_multiple(struct string_list *list)
1041{
1042 int i, result = 0;
1043 struct argv_array argv = ARGV_ARRAY_INIT;
1044 if (!append && !dry_run) {
1046 int errcode = truncate_fetch_head();
1047 if (errcode)
1048 return errcode;
1049 }
1050 argv_array_pushl(&argv, "fetch", "--append", NULL);
1052 add_options_to_argv(&argv);
1053 for (i = 0; i < list->nr; i++) {
1055 const char *name = list->items[i].string;
1056 argv_array_push(&argv, name);
1057 if (verbosity >= 0)
1058 printf(_("Fetching %s\n"), name);
1059 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1060 error(_("Could not fetch %s"), name);
1061 result = 1;
1062 }
1063 argv_array_pop(&argv);
1064 }
1065 argv_array_clear(&argv);
1067 return result;
1068}
1069static int fetch_one(struct remote *remote, int argc, const char **argv)
1071{
1072 static const char **refs = NULL;
1073 struct refspec *refspec;
1074 int ref_nr = 0;
1075 int exit_code;
1076 if (!remote)
1078 die(_("No remote repository specified. Please, specify either a URL or a\n"
1079 "remote name from which new revisions should be fetched."));
1080 gtransport = prepare_transport(remote);
1082 if (prune < 0) {
1084 /* no command line request */
1085 if (0 <= gtransport->remote->prune)
1086 prune = gtransport->remote->prune;
1087 else if (0 <= fetch_prune_config)
1088 prune = fetch_prune_config;
1089 else
1090 prune = PRUNE_BY_DEFAULT;
1091 }
1092 if (argc > 0) {
1094 int j = 0;
1095 int i;
1096 refs = xcalloc(argc + 1, sizeof(const char *));
1097 for (i = 0; i < argc; i++) {
1098 if (!strcmp(argv[i], "tag")) {
1099 i++;
1100 if (i >= argc)
1101 die(_("You need to specify a tag name."));
1102 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1103 argv[i], argv[i]);
1104 } else
1105 refs[j++] = argv[i];
1106 }
1107 refs[j] = NULL;
1108 ref_nr = j;
1109 }
1110 sigchain_push_common(unlock_pack_on_signal);
1112 atexit(unlock_pack);
1113 refspec = parse_fetch_refspec(ref_nr, refs);
1114 exit_code = do_fetch(gtransport, refspec, ref_nr);
1115 free_refspec(ref_nr, refspec);
1116 transport_disconnect(gtransport);
1117 gtransport = NULL;
1118 return exit_code;
1119}
1120int cmd_fetch(int argc, const char **argv, const char *prefix)
1122{
1123 int i;
1124 struct string_list list = STRING_LIST_INIT_NODUP;
1125 struct remote *remote;
1126 int result = 0;
1127 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1128 packet_trace_identity("fetch");
1130 /* Record the command line for the reflog */
1132 strbuf_addstr(&default_rla, "fetch");
1133 for (i = 1; i < argc; i++)
1134 strbuf_addf(&default_rla, " %s", argv[i]);
1135 git_config(git_fetch_config, NULL);
1137 argc = parse_options(argc, argv, prefix,
1139 builtin_fetch_options, builtin_fetch_usage, 0);
1140 if (unshallow) {
1142 if (depth)
1143 die(_("--depth and --unshallow cannot be used together"));
1144 else if (!is_repository_shallow())
1145 die(_("--unshallow on a complete repository does not make sense"));
1146 else {
1147 static char inf_depth[12];
1148 sprintf(inf_depth, "%d", INFINITE_DEPTH);
1149 depth = inf_depth;
1150 }
1151 }
1152 /* no need to be strict, transport_set_option() will validate it again */
1154 if (depth && atoi(depth) < 1)
1155 die(_("depth %s is not a positive number"), depth);
1156 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1158 if (recurse_submodules_default) {
1159 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1160 set_config_fetch_recurse_submodules(arg);
1161 }
1162 gitmodules_config();
1163 git_config(submodule_config, NULL);
1164 }
1165 if (all) {
1167 if (argc == 1)
1168 die(_("fetch --all does not take a repository argument"));
1169 else if (argc > 1)
1170 die(_("fetch --all does not make sense with refspecs"));
1171 (void) for_each_remote(get_one_remote_for_fetch, &list);
1172 result = fetch_multiple(&list);
1173 } else if (argc == 0) {
1174 /* No arguments -- use default remote */
1175 remote = remote_get(NULL);
1176 result = fetch_one(remote, argc, argv);
1177 } else if (multiple) {
1178 /* All arguments are assumed to be remotes or groups */
1179 for (i = 0; i < argc; i++)
1180 if (!add_remote_or_group(argv[i], &list))
1181 die(_("No such remote or remote group: %s"), argv[i]);
1182 result = fetch_multiple(&list);
1183 } else {
1184 /* Single remote or group */
1185 (void) add_remote_or_group(argv[0], &list);
1186 if (list.nr > 1) {
1187 /* More than one remote */
1188 if (argc > 1)
1189 die(_("Fetching a group and specifying refspecs does not make sense"));
1190 result = fetch_multiple(&list);
1191 } else {
1192 /* Zero or one remotes */
1193 remote = remote_get(argv[0]);
1194 result = fetch_one(remote, argc-1, argv+1);
1195 }
1196 }
1197 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1199 struct argv_array options = ARGV_ARRAY_INIT;
1200 add_options_to_argv(&options);
1202 result = fetch_populated_submodules(&options,
1203 submodule_prefix,
1204 recurse_submodules,
1205 verbosity < 0);
1206 argv_array_clear(&options);
1207 }
1208 /* All names were strdup()ed or strndup()ed */
1210 list.strdup_strings = 1;
1211 string_list_clear(&list, 0);
1212 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1214 if (verbosity < 0)
1215 argv_array_push(&argv_gc_auto, "--quiet");
1216 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1217 argv_array_clear(&argv_gc_auto);
1218 return result;
1220}