147504dd51974cf7eb3881948a3b46c40219027e
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 "submodule-config.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, deepen;
40static int max_children = 1;
41static const char *depth;
42static const char *deepen_since;
43static const char *upload_pack;
44static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
45static struct strbuf default_rla = STRBUF_INIT;
46static struct transport *gtransport;
47static struct transport *gsecondary;
48static const char *submodule_prefix = "";
49static const char *recurse_submodules_default;
50static int shown_url = 0;
51static int refmap_alloc, refmap_nr;
52static const char **refmap_array;
53static int option_parse_recurse_submodules(const struct option *opt,
55 const char *arg, int unset)
56{
57 if (unset) {
58 recurse_submodules = RECURSE_SUBMODULES_OFF;
59 } else {
60 if (arg)
61 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
62 else
63 recurse_submodules = RECURSE_SUBMODULES_ON;
64 }
65 return 0;
66}
67static int git_fetch_config(const char *k, const char *v, void *cb)
69{
70 if (!strcmp(k, "fetch.prune")) {
71 fetch_prune_config = git_config_bool(k, v);
72 return 0;
73 }
74 return git_default_config(k, v, cb);
75}
76static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
78{
79 ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
80 /*
82 * "git fetch --refmap='' origin foo"
83 * can be used to tell the command not to store anywhere
84 */
85 if (*arg)
86 refmap_array[refmap_nr++] = arg;
87 return 0;
88}
89static struct option builtin_fetch_options[] = {
91 OPT__VERBOSITY(&verbosity),
92 OPT_BOOL(0, "all", &all,
93 N_("fetch from all remotes")),
94 OPT_BOOL('a', "append", &append,
95 N_("append to .git/FETCH_HEAD instead of overwriting")),
96 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
97 N_("path to upload pack on remote end")),
98 OPT__FORCE(&force, N_("force overwrite of local branch")),
99 OPT_BOOL('m', "multiple", &multiple,
100 N_("fetch from multiple remotes")),
101 OPT_SET_INT('t', "tags", &tags,
102 N_("fetch all tags and associated objects"), TAGS_SET),
103 OPT_SET_INT('n', NULL, &tags,
104 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
105 OPT_INTEGER('j', "jobs", &max_children,
106 N_("number of submodules fetched in parallel")),
107 OPT_BOOL('p', "prune", &prune,
108 N_("prune remote-tracking branches no longer on remote")),
109 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
110 N_("control recursive fetching of submodules"),
111 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
112 OPT_BOOL(0, "dry-run", &dry_run,
113 N_("dry run")),
114 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
115 OPT_BOOL('u', "update-head-ok", &update_head_ok,
116 N_("allow updating of HEAD ref")),
117 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
118 OPT_STRING(0, "depth", &depth, N_("depth"),
119 N_("deepen history of shallow clone")),
120 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
121 N_("deepen history of shallow repository based on time")),
122 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
123 N_("deepen history of shallow clone by excluding rev")),
124 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
125 N_("convert to a complete repository"),
126 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
127 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
128 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
129 { OPTION_STRING, 0, "recurse-submodules-default",
130 &recurse_submodules_default, NULL,
131 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
132 OPT_BOOL(0, "update-shallow", &update_shallow,
133 N_("accept refs that update .git/shallow")),
134 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
135 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
136 OPT_END()
137};
138static void unlock_pack(void)
140{
141 if (gtransport)
142 transport_unlock_pack(gtransport);
143 if (gsecondary)
144 transport_unlock_pack(gsecondary);
145}
146static void unlock_pack_on_signal(int signo)
148{
149 unlock_pack();
150 sigchain_pop(signo);
151 raise(signo);
152}
153static void add_merge_config(struct ref **head,
155 const struct ref *remote_refs,
156 struct branch *branch,
157 struct ref ***tail)
158{
159 int i;
160 for (i = 0; i < branch->merge_nr; i++) {
162 struct ref *rm, **old_tail = *tail;
163 struct refspec refspec;
164 for (rm = *head; rm; rm = rm->next) {
166 if (branch_merge_matches(branch, i, rm->name)) {
167 rm->fetch_head_status = FETCH_HEAD_MERGE;
168 break;
169 }
170 }
171 if (rm)
172 continue;
173 /*
175 * Not fetched to a remote-tracking branch? We need to fetch
176 * it anyway to allow this branch's "branch.$name.merge"
177 * to be honored by 'git pull', but we do not have to
178 * fail if branch.$name.merge is misconfigured to point
179 * at a nonexisting branch. If we were indeed called by
180 * 'git pull', it will notice the misconfiguration because
181 * there is no entry in the resulting FETCH_HEAD marked
182 * for merging.
183 */
184 memset(&refspec, 0, sizeof(refspec));
185 refspec.src = branch->merge[i]->src;
186 get_fetch_map(remote_refs, &refspec, tail, 1);
187 for (rm = *old_tail; rm; rm = rm->next)
188 rm->fetch_head_status = FETCH_HEAD_MERGE;
189 }
190}
191static int add_existing(const char *refname, const struct object_id *oid,
193 int flag, void *cbdata)
194{
195 struct string_list *list = (struct string_list *)cbdata;
196 struct string_list_item *item = string_list_insert(list, refname);
197 struct object_id *old_oid = xmalloc(sizeof(*old_oid));
198 oidcpy(old_oid, oid);
200 item->util = old_oid;
201 return 0;
202}
203static int will_fetch(struct ref **head, const unsigned char *sha1)
205{
206 struct ref *rm = *head;
207 while (rm) {
208 if (!hashcmp(rm->old_oid.hash, sha1))
209 return 1;
210 rm = rm->next;
211 }
212 return 0;
213}
214static void find_non_local_tags(struct transport *transport,
216 struct ref **head,
217 struct ref ***tail)
218{
219 struct string_list existing_refs = STRING_LIST_INIT_DUP;
220 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
221 const struct ref *ref;
222 struct string_list_item *item = NULL;
223 for_each_ref(add_existing, &existing_refs);
225 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
226 if (!starts_with(ref->name, "refs/tags/"))
227 continue;
228 /*
230 * The peeled ref always follows the matching base
231 * ref, so if we see a peeled ref that we don't want
232 * to fetch then we can mark the ref entry in the list
233 * as one to ignore by setting util to NULL.
234 */
235 if (ends_with(ref->name, "^{}")) {
236 if (item && !has_object_file(&ref->old_oid) &&
237 !will_fetch(head, ref->old_oid.hash) &&
238 !has_sha1_file(item->util) &&
239 !will_fetch(head, item->util))
240 item->util = NULL;
241 item = NULL;
242 continue;
243 }
244 /*
246 * If item is non-NULL here, then we previously saw a
247 * ref not followed by a peeled reference, so we need
248 * to check if it is a lightweight tag that we want to
249 * fetch.
250 */
251 if (item && !has_sha1_file(item->util) &&
252 !will_fetch(head, item->util))
253 item->util = NULL;
254 item = NULL;
256 /* skip duplicates and refs that we already have */
258 if (string_list_has_string(&remote_refs, ref->name) ||
259 string_list_has_string(&existing_refs, ref->name))
260 continue;
261 item = string_list_insert(&remote_refs, ref->name);
263 item->util = (void *)&ref->old_oid;
264 }
265 string_list_clear(&existing_refs, 1);
266 /*
268 * We may have a final lightweight tag that needs to be
269 * checked to see if it needs fetching.
270 */
271 if (item && !has_sha1_file(item->util) &&
272 !will_fetch(head, item->util))
273 item->util = NULL;
274 /*
276 * For all the tags in the remote_refs string list,
277 * add them to the list of refs to be fetched
278 */
279 for_each_string_list_item(item, &remote_refs) {
280 /* Unless we have already decided to ignore this item... */
281 if (item->util)
282 {
283 struct ref *rm = alloc_ref(item->string);
284 rm->peer_ref = alloc_ref(item->string);
285 oidcpy(&rm->old_oid, item->util);
286 **tail = rm;
287 *tail = &rm->next;
288 }
289 }
290 string_list_clear(&remote_refs, 0);
292}
293static struct ref *get_ref_map(struct transport *transport,
295 struct refspec *refspecs, int refspec_count,
296 int tags, int *autotags)
297{
298 int i;
299 struct ref *rm;
300 struct ref *ref_map = NULL;
301 struct ref **tail = &ref_map;
302 /* opportunistically-updated references: */
304 struct ref *orefs = NULL, **oref_tail = &orefs;
305 const struct ref *remote_refs = transport_get_remote_refs(transport);
307 if (refspec_count) {
309 struct refspec *fetch_refspec;
310 int fetch_refspec_nr;
311 for (i = 0; i < refspec_count; i++) {
313 get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
314 if (refspecs[i].dst && refspecs[i].dst[0])
315 *autotags = 1;
316 }
317 /* Merge everything on the command line (but not --tags) */
318 for (rm = ref_map; rm; rm = rm->next)
319 rm->fetch_head_status = FETCH_HEAD_MERGE;
320 /*
322 * For any refs that we happen to be fetching via
323 * command-line arguments, the destination ref might
324 * have been missing or have been different than the
325 * remote-tracking ref that would be derived from the
326 * configured refspec. In these cases, we want to
327 * take the opportunity to update their configured
328 * remote-tracking reference. However, we do not want
329 * to mention these entries in FETCH_HEAD at all, as
330 * they would simply be duplicates of existing
331 * entries, so we set them FETCH_HEAD_IGNORE below.
332 *
333 * We compute these entries now, based only on the
334 * refspecs specified on the command line. But we add
335 * them to the list following the refspecs resulting
336 * from the tags option so that one of the latter,
337 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
338 * by ref_remove_duplicates() in favor of one of these
339 * opportunistic entries with FETCH_HEAD_IGNORE.
340 */
341 if (refmap_array) {
342 fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
343 fetch_refspec_nr = refmap_nr;
344 } else {
345 fetch_refspec = transport->remote->fetch;
346 fetch_refspec_nr = transport->remote->fetch_refspec_nr;
347 }
348 for (i = 0; i < fetch_refspec_nr; i++)
350 get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
351 if (tags == TAGS_SET)
353 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
354 } else if (refmap_array) {
355 die("--refmap option is only meaningful with command-line refspec(s).");
356 } else {
357 /* Use the defaults */
358 struct remote *remote = transport->remote;
359 struct branch *branch = branch_get(NULL);
360 int has_merge = branch_has_merge_config(branch);
361 if (remote &&
362 (remote->fetch_refspec_nr ||
363 /* Note: has_merge implies non-NULL branch->remote_name */
364 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
365 for (i = 0; i < remote->fetch_refspec_nr; i++) {
366 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
367 if (remote->fetch[i].dst &&
368 remote->fetch[i].dst[0])
369 *autotags = 1;
370 if (!i && !has_merge && ref_map &&
371 !remote->fetch[0].pattern)
372 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
373 }
374 /*
375 * if the remote we're fetching from is the same
376 * as given in branch.<name>.remote, we add the
377 * ref given in branch.<name>.merge, too.
378 *
379 * Note: has_merge implies non-NULL branch->remote_name
380 */
381 if (has_merge &&
382 !strcmp(branch->remote_name, remote->name))
383 add_merge_config(&ref_map, remote_refs, branch, &tail);
384 } else {
385 ref_map = get_remote_ref(remote_refs, "HEAD");
386 if (!ref_map)
387 die(_("Couldn't find remote ref HEAD"));
388 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
389 tail = &ref_map->next;
390 }
391 }
392 if (tags == TAGS_SET)
394 /* also fetch all tags */
395 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
396 else if (tags == TAGS_DEFAULT && *autotags)
397 find_non_local_tags(transport, &ref_map, &tail);
398 /* Now append any refs to be updated opportunistically: */
400 *tail = orefs;
401 for (rm = orefs; rm; rm = rm->next) {
402 rm->fetch_head_status = FETCH_HEAD_IGNORE;
403 tail = &rm->next;
404 }
405 return ref_remove_duplicates(ref_map);
407}
408#define STORE_REF_ERROR_OTHER 1
410#define STORE_REF_ERROR_DF_CONFLICT 2
411static int s_update_ref(const char *action,
413 struct ref *ref,
414 int check_old)
415{
416 char msg[1024];
417 char *rla = getenv("GIT_REFLOG_ACTION");
418 struct ref_transaction *transaction;
419 struct strbuf err = STRBUF_INIT;
420 int ret, df_conflict = 0;
421 if (dry_run)
423 return 0;
424 if (!rla)
425 rla = default_rla.buf;
426 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
427 transaction = ref_transaction_begin(&err);
429 if (!transaction ||
430 ref_transaction_update(transaction, ref->name,
431 ref->new_oid.hash,
432 check_old ? ref->old_oid.hash : NULL,
433 0, msg, &err))
434 goto fail;
435 ret = ref_transaction_commit(transaction, &err);
437 if (ret) {
438 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
439 goto fail;
440 }
441 ref_transaction_free(transaction);
443 strbuf_release(&err);
444 return 0;
445fail:
446 ref_transaction_free(transaction);
447 error("%s", err.buf);
448 strbuf_release(&err);
449 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
450 : STORE_REF_ERROR_OTHER;
451}
452#define REFCOL_WIDTH 10
454static int update_local_ref(struct ref *ref,
456 const char *remote,
457 const struct ref *remote_ref,
458 struct strbuf *display)
459{
460 struct commit *current = NULL, *updated;
461 enum object_type type;
462 struct branch *current_branch = branch_get(NULL);
463 const char *pretty_ref = prettify_refname(ref->name);
464 type = sha1_object_info(ref->new_oid.hash, NULL);
466 if (type < 0)
467 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
468 if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
470 if (verbosity > 0)
471 strbuf_addf(display, "= %-*s %-*s -> %s",
472 TRANSPORT_SUMMARY(_("[up to date]")),
473 REFCOL_WIDTH, remote, pretty_ref);
474 return 0;
475 }
476 if (current_branch &&
478 !strcmp(ref->name, current_branch->name) &&
479 !(update_head_ok || is_bare_repository()) &&
480 !is_null_oid(&ref->old_oid)) {
481 /*
482 * If this is the head, and it's not okay to update
483 * the head, and the old value of the head isn't empty...
484 */
485 strbuf_addf(display,
486 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
487 TRANSPORT_SUMMARY(_("[rejected]")),
488 REFCOL_WIDTH, remote, pretty_ref);
489 return 1;
490 }
491 if (!is_null_oid(&ref->old_oid) &&
493 starts_with(ref->name, "refs/tags/")) {
494 int r;
495 r = s_update_ref("updating tag", ref, 0);
496 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
497 r ? '!' : '-',
498 TRANSPORT_SUMMARY(_("[tag update]")),
499 REFCOL_WIDTH, remote, pretty_ref,
500 r ? _(" (unable to update local ref)") : "");
501 return r;
502 }
503 current = lookup_commit_reference_gently(ref->old_oid.hash, 1);
505 updated = lookup_commit_reference_gently(ref->new_oid.hash, 1);
506 if (!current || !updated) {
507 const char *msg;
508 const char *what;
509 int r;
510 /*
511 * Nicely describe the new ref we're fetching.
512 * Base this on the remote's ref name, as it's
513 * more likely to follow a standard layout.
514 */
515 const char *name = remote_ref ? remote_ref->name : "";
516 if (starts_with(name, "refs/tags/")) {
517 msg = "storing tag";
518 what = _("[new tag]");
519 } else if (starts_with(name, "refs/heads/")) {
520 msg = "storing head";
521 what = _("[new branch]");
522 } else {
523 msg = "storing ref";
524 what = _("[new ref]");
525 }
526 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
528 (recurse_submodules != RECURSE_SUBMODULES_ON))
529 check_for_new_submodule_commits(ref->new_oid.hash);
530 r = s_update_ref(msg, ref, 0);
531 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
532 r ? '!' : '*',
533 TRANSPORT_SUMMARY(what),
534 REFCOL_WIDTH, remote, pretty_ref,
535 r ? _(" (unable to update local ref)") : "");
536 return r;
537 }
538 if (in_merge_bases(current, updated)) {
540 struct strbuf quickref = STRBUF_INIT;
541 int r;
542 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
543 strbuf_addstr(&quickref, "..");
544 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
545 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
546 (recurse_submodules != RECURSE_SUBMODULES_ON))
547 check_for_new_submodule_commits(ref->new_oid.hash);
548 r = s_update_ref("fast-forward", ref, 1);
549 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
550 r ? '!' : ' ',
551 TRANSPORT_SUMMARY_WIDTH, quickref.buf,
552 REFCOL_WIDTH, remote, pretty_ref,
553 r ? _(" (unable to update local ref)") : "");
554 strbuf_release(&quickref);
555 return r;
556 } else if (force || ref->force) {
557 struct strbuf quickref = STRBUF_INIT;
558 int r;
559 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
560 strbuf_addstr(&quickref, "...");
561 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
562 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
563 (recurse_submodules != RECURSE_SUBMODULES_ON))
564 check_for_new_submodule_commits(ref->new_oid.hash);
565 r = s_update_ref("forced-update", ref, 1);
566 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
567 r ? '!' : '+',
568 TRANSPORT_SUMMARY_WIDTH, quickref.buf,
569 REFCOL_WIDTH, remote, pretty_ref,
570 r ? _("unable to update local ref") : _("forced update"));
571 strbuf_release(&quickref);
572 return r;
573 } else {
574 strbuf_addf(display, "! %-*s %-*s -> %s %s",
575 TRANSPORT_SUMMARY(_("[rejected]")),
576 REFCOL_WIDTH, remote, pretty_ref,
577 _("(non-fast-forward)"));
578 return 1;
579 }
580}
581static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
583{
584 struct ref **rm = cb_data;
585 struct ref *ref = *rm;
586 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
588 ref = ref->next;
589 if (!ref)
590 return -1; /* end of the list */
591 *rm = ref->next;
592 hashcpy(sha1, ref->old_oid.hash);
593 return 0;
594}
595static int store_updated_refs(const char *raw_url, const char *remote_name,
597 struct ref *ref_map)
598{
599 FILE *fp;
600 struct commit *commit;
601 int url_len, i, rc = 0;
602 struct strbuf note = STRBUF_INIT;
603 const char *what, *kind;
604 struct ref *rm;
605 char *url;
606 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
607 int want_status;
608 fp = fopen(filename, "a");
610 if (!fp)
611 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
612 if (raw_url)
614 url = transport_anonymize_url(raw_url);
615 else
616 url = xstrdup("foreign");
617 rm = ref_map;
619 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
620 rc = error(_("%s did not send all necessary objects\n"), url);
621 goto abort;
622 }
623 /*
625 * We do a pass for each fetch_head_status type in their enum order, so
626 * merged entries are written before not-for-merge. That lets readers
627 * use FETCH_HEAD as a refname to refer to the ref to be merged.
628 */
629 for (want_status = FETCH_HEAD_MERGE;
630 want_status <= FETCH_HEAD_IGNORE;
631 want_status++) {
632 for (rm = ref_map; rm; rm = rm->next) {
633 struct ref *ref = NULL;
634 const char *merge_status_marker = "";
635 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
637 if (want_status == FETCH_HEAD_MERGE)
638 warning(_("reject %s because shallow roots are not allowed to be updated"),
639 rm->peer_ref ? rm->peer_ref->name : rm->name);
640 continue;
641 }
642 commit = lookup_commit_reference_gently(rm->old_oid.hash, 1);
644 if (!commit)
645 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
646 if (rm->fetch_head_status != want_status)
648 continue;
649 if (rm->peer_ref) {
651 ref = alloc_ref(rm->peer_ref->name);
652 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
653 oidcpy(&ref->new_oid, &rm->old_oid);
654 ref->force = rm->peer_ref->force;
655 }
656 if (!strcmp(rm->name, "HEAD")) {
659 kind = "";
660 what = "";
661 }
662 else if (starts_with(rm->name, "refs/heads/")) {
663 kind = "branch";
664 what = rm->name + 11;
665 }
666 else if (starts_with(rm->name, "refs/tags/")) {
667 kind = "tag";
668 what = rm->name + 10;
669 }
670 else if (starts_with(rm->name, "refs/remotes/")) {
671 kind = "remote-tracking branch";
672 what = rm->name + 13;
673 }
674 else {
675 kind = "";
676 what = rm->name;
677 }
678 url_len = strlen(url);
680 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
681 ;
682 url_len = i + 1;
683 if (4 < i && !strncmp(".git", url + i - 3, 4))
684 url_len = i - 3;
685 strbuf_reset(¬e);
687 if (*what) {
688 if (*kind)
689 strbuf_addf(¬e, "%s ", kind);
690 strbuf_addf(¬e, "'%s' of ", what);
691 }
692 switch (rm->fetch_head_status) {
693 case FETCH_HEAD_NOT_FOR_MERGE:
694 merge_status_marker = "not-for-merge";
695 /* fall-through */
696 case FETCH_HEAD_MERGE:
697 fprintf(fp, "%s\t%s\t%s",
698 oid_to_hex(&rm->old_oid),
699 merge_status_marker,
700 note.buf);
701 for (i = 0; i < url_len; ++i)
702 if ('\n' == url[i])
703 fputs("\\n", fp);
704 else
705 fputc(url[i], fp);
706 fputc('\n', fp);
707 break;
708 default:
709 /* do not write anything to FETCH_HEAD */
710 break;
711 }
712 strbuf_reset(¬e);
714 if (ref) {
715 rc |= update_local_ref(ref, what, rm, ¬e);
716 free(ref);
717 } else
718 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
719 TRANSPORT_SUMMARY_WIDTH,
720 *kind ? kind : "branch",
721 REFCOL_WIDTH,
722 *what ? what : "HEAD");
723 if (note.len) {
724 if (verbosity >= 0 && !shown_url) {
725 fprintf(stderr, _("From %.*s\n"),
726 url_len, url);
727 shown_url = 1;
728 }
729 if (verbosity >= 0)
730 fprintf(stderr, " %s\n", note.buf);
731 }
732 }
733 }
734 if (rc & STORE_REF_ERROR_DF_CONFLICT)
736 error(_("some local refs could not be updated; try running\n"
737 " 'git remote prune %s' to remove any old, conflicting "
738 "branches"), remote_name);
739 abort:
741 strbuf_release(¬e);
742 free(url);
743 fclose(fp);
744 return rc;
745}
746/*
748 * We would want to bypass the object transfer altogether if
749 * everything we are going to fetch already exists and is connected
750 * locally.
751 */
752static int quickfetch(struct ref *ref_map)
753{
754 struct ref *rm = ref_map;
755 /*
757 * If we are deepening a shallow clone we already have these
758 * objects reachable. Running rev-list here will return with
759 * a good (0) exit status and we'll bypass the fetch that we
760 * really need to perform. Claiming failure now will ensure
761 * we perform the network exchange to deepen our history.
762 */
763 if (deepen)
764 return -1;
765 return check_everything_connected(iterate_ref_map, 1, &rm);
766}
767static int fetch_refs(struct transport *transport, struct ref *ref_map)
769{
770 int ret = quickfetch(ref_map);
771 if (ret)
772 ret = transport_fetch_refs(transport, ref_map);
773 if (!ret)
774 ret |= store_updated_refs(transport->url,
775 transport->remote->name,
776 ref_map);
777 transport_unlock_pack(transport);
778 return ret;
779}
780static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
782 const char *raw_url)
783{
784 int url_len, i, result = 0;
785 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
786 char *url;
787 const char *dangling_msg = dry_run
788 ? _(" (%s will become dangling)")
789 : _(" (%s has become dangling)");
790 if (raw_url)
792 url = transport_anonymize_url(raw_url);
793 else
794 url = xstrdup("foreign");
795 url_len = strlen(url);
797 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
798 ;
799 url_len = i + 1;
801 if (4 < i && !strncmp(".git", url + i - 3, 4))
802 url_len = i - 3;
803 if (!dry_run) {
805 struct string_list refnames = STRING_LIST_INIT_NODUP;
806 for (ref = stale_refs; ref; ref = ref->next)
808 string_list_append(&refnames, ref->name);
809 result = delete_refs(&refnames);
811 string_list_clear(&refnames, 0);
812 }
813 if (verbosity >= 0) {
815 for (ref = stale_refs; ref; ref = ref->next) {
816 if (!shown_url) {
817 fprintf(stderr, _("From %.*s\n"), url_len, url);
818 shown_url = 1;
819 }
820 fprintf(stderr, " x %-*s %-*s -> %s\n",
821 TRANSPORT_SUMMARY(_("[deleted]")),
822 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
823 warn_dangling_symref(stderr, dangling_msg, ref->name);
824 }
825 }
826 free(url);
828 free_refs(stale_refs);
829 return result;
830}
831static void check_not_current_branch(struct ref *ref_map)
833{
834 struct branch *current_branch = branch_get(NULL);
835 if (is_bare_repository() || !current_branch)
837 return;
838 for (; ref_map; ref_map = ref_map->next)
840 if (ref_map->peer_ref && !strcmp(current_branch->refname,
841 ref_map->peer_ref->name))
842 die(_("Refusing to fetch into current branch %s "
843 "of non-bare repository"), current_branch->refname);
844}
845static int truncate_fetch_head(void)
847{
848 const char *filename = git_path_fetch_head();
849 FILE *fp = fopen_for_writing(filename);
850 if (!fp)
852 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
853 fclose(fp);
854 return 0;
855}
856static void set_option(struct transport *transport, const char *name, const char *value)
858{
859 int r = transport_set_option(transport, name, value);
860 if (r < 0)
861 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
862 name, value, transport->url);
863 if (r > 0)
864 warning(_("Option \"%s\" is ignored for %s\n"),
865 name, transport->url);
866}
867static struct transport *prepare_transport(struct remote *remote, int deepen)
869{
870 struct transport *transport;
871 transport = transport_get(remote, NULL);
872 transport_set_verbosity(transport, verbosity, progress);
873 if (upload_pack)
874 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
875 if (keep)
876 set_option(transport, TRANS_OPT_KEEP, "yes");
877 if (depth)
878 set_option(transport, TRANS_OPT_DEPTH, depth);
879 if (deepen && deepen_since)
880 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
881 if (deepen && deepen_not.nr)
882 set_option(transport, TRANS_OPT_DEEPEN_NOT,
883 (const char *)&deepen_not);
884 if (update_shallow)
885 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
886 return transport;
887}
888static void backfill_tags(struct transport *transport, struct ref *ref_map)
890{
891 int cannot_reuse;
892 /*
894 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
895 * when remote helper is used (setting it to an empty string
896 * is not unsetting). We could extend the remote helper
897 * protocol for that, but for now, just force a new connection
898 * without deepen-since. Similar story for deepen-not.
899 */
900 cannot_reuse = transport->cannot_reuse ||
901 deepen_since || deepen_not.nr;
902 if (cannot_reuse) {
903 gsecondary = prepare_transport(transport->remote, 0);
904 transport = gsecondary;
905 }
906 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
908 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
909 fetch_refs(transport, ref_map);
910 if (gsecondary) {
912 transport_disconnect(gsecondary);
913 gsecondary = NULL;
914 }
915}
916static int do_fetch(struct transport *transport,
918 struct refspec *refs, int ref_count)
919{
920 struct string_list existing_refs = STRING_LIST_INIT_DUP;
921 struct ref *ref_map;
922 struct ref *rm;
923 int autotags = (transport->remote->fetch_tags == 1);
924 int retcode = 0;
925 for_each_ref(add_existing, &existing_refs);
927 if (tags == TAGS_DEFAULT) {
929 if (transport->remote->fetch_tags == 2)
930 tags = TAGS_SET;
931 if (transport->remote->fetch_tags == -1)
932 tags = TAGS_UNSET;
933 }
934 if (!transport->get_refs_list || !transport->fetch)
936 die(_("Don't know how to fetch from %s"), transport->url);
937 /* if not appending, truncate FETCH_HEAD */
939 if (!append && !dry_run) {
940 retcode = truncate_fetch_head();
941 if (retcode)
942 goto cleanup;
943 }
944 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
946 if (!update_head_ok)
947 check_not_current_branch(ref_map);
948 for (rm = ref_map; rm; rm = rm->next) {
950 if (rm->peer_ref) {
951 struct string_list_item *peer_item =
952 string_list_lookup(&existing_refs,
953 rm->peer_ref->name);
954 if (peer_item) {
955 struct object_id *old_oid = peer_item->util;
956 oidcpy(&rm->peer_ref->old_oid, old_oid);
957 }
958 }
959 }
960 if (tags == TAGS_DEFAULT && autotags)
962 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
963 if (prune) {
964 /*
965 * We only prune based on refspecs specified
966 * explicitly (via command line or configuration); we
967 * don't care whether --tags was specified.
968 */
969 if (ref_count) {
970 prune_refs(refs, ref_count, ref_map, transport->url);
971 } else {
972 prune_refs(transport->remote->fetch,
973 transport->remote->fetch_refspec_nr,
974 ref_map,
975 transport->url);
976 }
977 }
978 if (fetch_refs(transport, ref_map)) {
979 free_refs(ref_map);
980 retcode = 1;
981 goto cleanup;
982 }
983 free_refs(ref_map);
984 /* if neither --no-tags nor --tags was specified, do automated tag
986 * following ... */
987 if (tags == TAGS_DEFAULT && autotags) {
988 struct ref **tail = &ref_map;
989 ref_map = NULL;
990 find_non_local_tags(transport, &ref_map, &tail);
991 if (ref_map)
992 backfill_tags(transport, ref_map);
993 free_refs(ref_map);
994 }
995 cleanup:
997 string_list_clear(&existing_refs, 1);
998 return retcode;
999}
1000static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1002{
1003 struct string_list *list = priv;
1004 if (!remote->skip_default_update)
1005 string_list_append(list, remote->name);
1006 return 0;
1007}
1008struct remote_group_data {
1010 const char *name;
1011 struct string_list *list;
1012};
1013static int get_remote_group(const char *key, const char *value, void *priv)
1015{
1016 struct remote_group_data *g = priv;
1017 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1019 /* split list by white space */
1020 while (*value) {
1021 size_t wordlen = strcspn(value, " \t\n");
1022 if (wordlen >= 1)
1024 string_list_append(g->list,
1025 xstrndup(value, wordlen));
1026 value += wordlen + (value[wordlen] != '\0');
1027 }
1028 }
1029 return 0;
1031}
1032static int add_remote_or_group(const char *name, struct string_list *list)
1034{
1035 int prev_nr = list->nr;
1036 struct remote_group_data g;
1037 g.name = name; g.list = list;
1038 git_config(get_remote_group, &g);
1040 if (list->nr == prev_nr) {
1041 struct remote *remote;
1042 if (!remote_is_configured(name))
1043 return 0;
1044 remote = remote_get(name);
1045 string_list_append(list, remote->name);
1046 }
1047 return 1;
1048}
1049static void add_options_to_argv(struct argv_array *argv)
1051{
1052 if (dry_run)
1053 argv_array_push(argv, "--dry-run");
1054 if (prune != -1)
1055 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1056 if (update_head_ok)
1057 argv_array_push(argv, "--update-head-ok");
1058 if (force)
1059 argv_array_push(argv, "--force");
1060 if (keep)
1061 argv_array_push(argv, "--keep");
1062 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1063 argv_array_push(argv, "--recurse-submodules");
1064 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1065 argv_array_push(argv, "--recurse-submodules=on-demand");
1066 if (tags == TAGS_SET)
1067 argv_array_push(argv, "--tags");
1068 else if (tags == TAGS_UNSET)
1069 argv_array_push(argv, "--no-tags");
1070 if (verbosity >= 2)
1071 argv_array_push(argv, "-v");
1072 if (verbosity >= 1)
1073 argv_array_push(argv, "-v");
1074 else if (verbosity < 0)
1075 argv_array_push(argv, "-q");
1076}
1078static int fetch_multiple(struct string_list *list)
1080{
1081 int i, result = 0;
1082 struct argv_array argv = ARGV_ARRAY_INIT;
1083 if (!append && !dry_run) {
1085 int errcode = truncate_fetch_head();
1086 if (errcode)
1087 return errcode;
1088 }
1089 argv_array_pushl(&argv, "fetch", "--append", NULL);
1091 add_options_to_argv(&argv);
1092 for (i = 0; i < list->nr; i++) {
1094 const char *name = list->items[i].string;
1095 argv_array_push(&argv, name);
1096 if (verbosity >= 0)
1097 printf(_("Fetching %s\n"), name);
1098 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1099 error(_("Could not fetch %s"), name);
1100 result = 1;
1101 }
1102 argv_array_pop(&argv);
1103 }
1104 argv_array_clear(&argv);
1106 return result;
1107}
1108static int fetch_one(struct remote *remote, int argc, const char **argv)
1110{
1111 static const char **refs = NULL;
1112 struct refspec *refspec;
1113 int ref_nr = 0;
1114 int exit_code;
1115 if (!remote)
1117 die(_("No remote repository specified. Please, specify either a URL or a\n"
1118 "remote name from which new revisions should be fetched."));
1119 gtransport = prepare_transport(remote, 1);
1121 if (prune < 0) {
1123 /* no command line request */
1124 if (0 <= gtransport->remote->prune)
1125 prune = gtransport->remote->prune;
1126 else if (0 <= fetch_prune_config)
1127 prune = fetch_prune_config;
1128 else
1129 prune = PRUNE_BY_DEFAULT;
1130 }
1131 if (argc > 0) {
1133 int j = 0;
1134 int i;
1135 refs = xcalloc(argc + 1, sizeof(const char *));
1136 for (i = 0; i < argc; i++) {
1137 if (!strcmp(argv[i], "tag")) {
1138 i++;
1139 if (i >= argc)
1140 die(_("You need to specify a tag name."));
1141 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1142 argv[i], argv[i]);
1143 } else
1144 refs[j++] = argv[i];
1145 }
1146 refs[j] = NULL;
1147 ref_nr = j;
1148 }
1149 sigchain_push_common(unlock_pack_on_signal);
1151 atexit(unlock_pack);
1152 refspec = parse_fetch_refspec(ref_nr, refs);
1153 exit_code = do_fetch(gtransport, refspec, ref_nr);
1154 free_refspec(ref_nr, refspec);
1155 transport_disconnect(gtransport);
1156 gtransport = NULL;
1157 return exit_code;
1158}
1159int cmd_fetch(int argc, const char **argv, const char *prefix)
1161{
1162 int i;
1163 struct string_list list = STRING_LIST_INIT_NODUP;
1164 struct remote *remote;
1165 int result = 0;
1166 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1167 packet_trace_identity("fetch");
1169 /* Record the command line for the reflog */
1171 strbuf_addstr(&default_rla, "fetch");
1172 for (i = 1; i < argc; i++)
1173 strbuf_addf(&default_rla, " %s", argv[i]);
1174 git_config(git_fetch_config, NULL);
1176 argc = parse_options(argc, argv, prefix,
1178 builtin_fetch_options, builtin_fetch_usage, 0);
1179 if (unshallow) {
1181 if (depth)
1182 die(_("--depth and --unshallow cannot be used together"));
1183 else if (!is_repository_shallow())
1184 die(_("--unshallow on a complete repository does not make sense"));
1185 else
1186 depth = xstrfmt("%d", INFINITE_DEPTH);
1187 }
1188 /* no need to be strict, transport_set_option() will validate it again */
1190 if (depth && atoi(depth) < 1)
1191 die(_("depth %s is not a positive number"), depth);
1192 if (depth || deepen_since || deepen_not.nr)
1193 deepen = 1;
1194 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1196 if (recurse_submodules_default) {
1197 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1198 set_config_fetch_recurse_submodules(arg);
1199 }
1200 gitmodules_config();
1201 git_config(submodule_config, NULL);
1202 }
1203 if (all) {
1205 if (argc == 1)
1206 die(_("fetch --all does not take a repository argument"));
1207 else if (argc > 1)
1208 die(_("fetch --all does not make sense with refspecs"));
1209 (void) for_each_remote(get_one_remote_for_fetch, &list);
1210 result = fetch_multiple(&list);
1211 } else if (argc == 0) {
1212 /* No arguments -- use default remote */
1213 remote = remote_get(NULL);
1214 result = fetch_one(remote, argc, argv);
1215 } else if (multiple) {
1216 /* All arguments are assumed to be remotes or groups */
1217 for (i = 0; i < argc; i++)
1218 if (!add_remote_or_group(argv[i], &list))
1219 die(_("No such remote or remote group: %s"), argv[i]);
1220 result = fetch_multiple(&list);
1221 } else {
1222 /* Single remote or group */
1223 (void) add_remote_or_group(argv[0], &list);
1224 if (list.nr > 1) {
1225 /* More than one remote */
1226 if (argc > 1)
1227 die(_("Fetching a group and specifying refspecs does not make sense"));
1228 result = fetch_multiple(&list);
1229 } else {
1230 /* Zero or one remotes */
1231 remote = remote_get(argv[0]);
1232 result = fetch_one(remote, argc-1, argv+1);
1233 }
1234 }
1235 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1237 struct argv_array options = ARGV_ARRAY_INIT;
1238 add_options_to_argv(&options);
1240 result = fetch_populated_submodules(&options,
1241 submodule_prefix,
1242 recurse_submodules,
1243 verbosity < 0,
1244 max_children);
1245 argv_array_clear(&options);
1246 }
1247 /* All names were strdup()ed or strndup()ed */
1249 list.strdup_strings = 1;
1250 string_list_clear(&list, 0);
1251 close_all_packs();
1253 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1255 if (verbosity < 0)
1256 argv_array_push(&argv_gc_auto, "--quiet");
1257 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1258 argv_array_clear(&argv_gc_auto);
1259 return result;
1261}