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 0;
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 static struct ref_lock *lock;
408 if (dry_run)
410 return 0;
411 if (!rla)
412 rla = default_rla.buf;
413 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
414 lock = lock_any_ref_for_update(ref->name,
415 check_old ? ref->old_sha1 : NULL,
416 0, NULL);
417 if (!lock)
418 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
419 STORE_REF_ERROR_OTHER;
420 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
421 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
422 STORE_REF_ERROR_OTHER;
423 return 0;
424}
425#define REFCOL_WIDTH 10
427static int update_local_ref(struct ref *ref,
429 const char *remote,
430 const struct ref *remote_ref,
431 struct strbuf *display)
432{
433 struct commit *current = NULL, *updated;
434 enum object_type type;
435 struct branch *current_branch = branch_get(NULL);
436 const char *pretty_ref = prettify_refname(ref->name);
437 type = sha1_object_info(ref->new_sha1, NULL);
439 if (type < 0)
440 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
441 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
443 if (verbosity > 0)
444 strbuf_addf(display, "= %-*s %-*s -> %s",
445 TRANSPORT_SUMMARY(_("[up to date]")),
446 REFCOL_WIDTH, remote, pretty_ref);
447 return 0;
448 }
449 if (current_branch &&
451 !strcmp(ref->name, current_branch->name) &&
452 !(update_head_ok || is_bare_repository()) &&
453 !is_null_sha1(ref->old_sha1)) {
454 /*
455 * If this is the head, and it's not okay to update
456 * the head, and the old value of the head isn't empty...
457 */
458 strbuf_addf(display,
459 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
460 TRANSPORT_SUMMARY(_("[rejected]")),
461 REFCOL_WIDTH, remote, pretty_ref);
462 return 1;
463 }
464 if (!is_null_sha1(ref->old_sha1) &&
466 starts_with(ref->name, "refs/tags/")) {
467 int r;
468 r = s_update_ref("updating tag", ref, 0);
469 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
470 r ? '!' : '-',
471 TRANSPORT_SUMMARY(_("[tag update]")),
472 REFCOL_WIDTH, remote, pretty_ref,
473 r ? _(" (unable to update local ref)") : "");
474 return r;
475 }
476 current = lookup_commit_reference_gently(ref->old_sha1, 1);
478 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
479 if (!current || !updated) {
480 const char *msg;
481 const char *what;
482 int r;
483 /*
484 * Nicely describe the new ref we're fetching.
485 * Base this on the remote's ref name, as it's
486 * more likely to follow a standard layout.
487 */
488 const char *name = remote_ref ? remote_ref->name : "";
489 if (starts_with(name, "refs/tags/")) {
490 msg = "storing tag";
491 what = _("[new tag]");
492 } else if (starts_with(name, "refs/heads/")) {
493 msg = "storing head";
494 what = _("[new branch]");
495 } else {
496 msg = "storing ref";
497 what = _("[new ref]");
498 }
499 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
501 (recurse_submodules != RECURSE_SUBMODULES_ON))
502 check_for_new_submodule_commits(ref->new_sha1);
503 r = s_update_ref(msg, ref, 0);
504 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
505 r ? '!' : '*',
506 TRANSPORT_SUMMARY(what),
507 REFCOL_WIDTH, remote, pretty_ref,
508 r ? _(" (unable to update local ref)") : "");
509 return r;
510 }
511 if (in_merge_bases(current, updated)) {
513 char quickref[83];
514 int r;
515 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
516 strcat(quickref, "..");
517 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
518 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
519 (recurse_submodules != RECURSE_SUBMODULES_ON))
520 check_for_new_submodule_commits(ref->new_sha1);
521 r = s_update_ref("fast-forward", ref, 1);
522 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
523 r ? '!' : ' ',
524 TRANSPORT_SUMMARY_WIDTH, quickref,
525 REFCOL_WIDTH, remote, pretty_ref,
526 r ? _(" (unable to update local ref)") : "");
527 return r;
528 } else if (force || ref->force) {
529 char quickref[84];
530 int r;
531 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
532 strcat(quickref, "...");
533 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
534 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
535 (recurse_submodules != RECURSE_SUBMODULES_ON))
536 check_for_new_submodule_commits(ref->new_sha1);
537 r = s_update_ref("forced-update", ref, 1);
538 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
539 r ? '!' : '+',
540 TRANSPORT_SUMMARY_WIDTH, quickref,
541 REFCOL_WIDTH, remote, pretty_ref,
542 r ? _("unable to update local ref") : _("forced update"));
543 return r;
544 } else {
545 strbuf_addf(display, "! %-*s %-*s -> %s %s",
546 TRANSPORT_SUMMARY(_("[rejected]")),
547 REFCOL_WIDTH, remote, pretty_ref,
548 _("(non-fast-forward)"));
549 return 1;
550 }
551}
552static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
554{
555 struct ref **rm = cb_data;
556 struct ref *ref = *rm;
557 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
559 ref = ref->next;
560 if (!ref)
561 return -1; /* end of the list */
562 *rm = ref->next;
563 hashcpy(sha1, ref->old_sha1);
564 return 0;
565}
566static int store_updated_refs(const char *raw_url, const char *remote_name,
568 struct ref *ref_map)
569{
570 FILE *fp;
571 struct commit *commit;
572 int url_len, i, rc = 0;
573 struct strbuf note = STRBUF_INIT;
574 const char *what, *kind;
575 struct ref *rm;
576 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
577 int want_status;
578 fp = fopen(filename, "a");
580 if (!fp)
581 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
582 if (raw_url)
584 url = transport_anonymize_url(raw_url);
585 else
586 url = xstrdup("foreign");
587 rm = ref_map;
589 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
590 rc = error(_("%s did not send all necessary objects\n"), url);
591 goto abort;
592 }
593 /*
595 * We do a pass for each fetch_head_status type in their enum order, so
596 * merged entries are written before not-for-merge. That lets readers
597 * use FETCH_HEAD as a refname to refer to the ref to be merged.
598 */
599 for (want_status = FETCH_HEAD_MERGE;
600 want_status <= FETCH_HEAD_IGNORE;
601 want_status++) {
602 for (rm = ref_map; rm; rm = rm->next) {
603 struct ref *ref = NULL;
604 const char *merge_status_marker = "";
605 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
607 if (want_status == FETCH_HEAD_MERGE)
608 warning(_("reject %s because shallow roots are not allowed to be updated"),
609 rm->peer_ref ? rm->peer_ref->name : rm->name);
610 continue;
611 }
612 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
614 if (!commit)
615 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
616 if (rm->fetch_head_status != want_status)
618 continue;
619 if (rm->peer_ref) {
621 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
622 strcpy(ref->name, rm->peer_ref->name);
623 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
624 hashcpy(ref->new_sha1, rm->old_sha1);
625 ref->force = rm->peer_ref->force;
626 }
627 if (!strcmp(rm->name, "HEAD")) {
630 kind = "";
631 what = "";
632 }
633 else if (starts_with(rm->name, "refs/heads/")) {
634 kind = "branch";
635 what = rm->name + 11;
636 }
637 else if (starts_with(rm->name, "refs/tags/")) {
638 kind = "tag";
639 what = rm->name + 10;
640 }
641 else if (starts_with(rm->name, "refs/remotes/")) {
642 kind = "remote-tracking branch";
643 what = rm->name + 13;
644 }
645 else {
646 kind = "";
647 what = rm->name;
648 }
649 url_len = strlen(url);
651 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
652 ;
653 url_len = i + 1;
654 if (4 < i && !strncmp(".git", url + i - 3, 4))
655 url_len = i - 3;
656 strbuf_reset(¬e);
658 if (*what) {
659 if (*kind)
660 strbuf_addf(¬e, "%s ", kind);
661 strbuf_addf(¬e, "'%s' of ", what);
662 }
663 switch (rm->fetch_head_status) {
664 case FETCH_HEAD_NOT_FOR_MERGE:
665 merge_status_marker = "not-for-merge";
666 /* fall-through */
667 case FETCH_HEAD_MERGE:
668 fprintf(fp, "%s\t%s\t%s",
669 sha1_to_hex(rm->old_sha1),
670 merge_status_marker,
671 note.buf);
672 for (i = 0; i < url_len; ++i)
673 if ('\n' == url[i])
674 fputs("\\n", fp);
675 else
676 fputc(url[i], fp);
677 fputc('\n', fp);
678 break;
679 default:
680 /* do not write anything to FETCH_HEAD */
681 break;
682 }
683 strbuf_reset(¬e);
685 if (ref) {
686 rc |= update_local_ref(ref, what, rm, ¬e);
687 free(ref);
688 } else
689 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
690 TRANSPORT_SUMMARY_WIDTH,
691 *kind ? kind : "branch",
692 REFCOL_WIDTH,
693 *what ? what : "HEAD");
694 if (note.len) {
695 if (verbosity >= 0 && !shown_url) {
696 fprintf(stderr, _("From %.*s\n"),
697 url_len, url);
698 shown_url = 1;
699 }
700 if (verbosity >= 0)
701 fprintf(stderr, " %s\n", note.buf);
702 }
703 }
704 }
705 if (rc & STORE_REF_ERROR_DF_CONFLICT)
707 error(_("some local refs could not be updated; try running\n"
708 " 'git remote prune %s' to remove any old, conflicting "
709 "branches"), remote_name);
710 abort:
712 strbuf_release(¬e);
713 free(url);
714 fclose(fp);
715 return rc;
716}
717/*
719 * We would want to bypass the object transfer altogether if
720 * everything we are going to fetch already exists and is connected
721 * locally.
722 */
723static int quickfetch(struct ref *ref_map)
724{
725 struct ref *rm = ref_map;
726 /*
728 * If we are deepening a shallow clone we already have these
729 * objects reachable. Running rev-list here will return with
730 * a good (0) exit status and we'll bypass the fetch that we
731 * really need to perform. Claiming failure now will ensure
732 * we perform the network exchange to deepen our history.
733 */
734 if (depth)
735 return -1;
736 return check_everything_connected(iterate_ref_map, 1, &rm);
737}
738static int fetch_refs(struct transport *transport, struct ref *ref_map)
740{
741 int ret = quickfetch(ref_map);
742 if (ret)
743 ret = transport_fetch_refs(transport, ref_map);
744 if (!ret)
745 ret |= store_updated_refs(transport->url,
746 transport->remote->name,
747 ref_map);
748 transport_unlock_pack(transport);
749 return ret;
750}
751static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
753 const char *raw_url)
754{
755 int url_len, i, result = 0;
756 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
757 char *url;
758 const char *dangling_msg = dry_run
759 ? _(" (%s will become dangling)")
760 : _(" (%s has become dangling)");
761 if (raw_url)
763 url = transport_anonymize_url(raw_url);
764 else
765 url = xstrdup("foreign");
766 url_len = strlen(url);
768 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
769 ;
770 url_len = i + 1;
772 if (4 < i && !strncmp(".git", url + i - 3, 4))
773 url_len = i - 3;
774 for (ref = stale_refs; ref; ref = ref->next) {
776 if (!dry_run)
777 result |= delete_ref(ref->name, NULL, 0);
778 if (verbosity >= 0 && !shown_url) {
779 fprintf(stderr, _("From %.*s\n"), url_len, url);
780 shown_url = 1;
781 }
782 if (verbosity >= 0) {
783 fprintf(stderr, " x %-*s %-*s -> %s\n",
784 TRANSPORT_SUMMARY(_("[deleted]")),
785 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
786 warn_dangling_symref(stderr, dangling_msg, ref->name);
787 }
788 }
789 free(url);
790 free_refs(stale_refs);
791 return result;
792}
793static void check_not_current_branch(struct ref *ref_map)
795{
796 struct branch *current_branch = branch_get(NULL);
797 if (is_bare_repository() || !current_branch)
799 return;
800 for (; ref_map; ref_map = ref_map->next)
802 if (ref_map->peer_ref && !strcmp(current_branch->refname,
803 ref_map->peer_ref->name))
804 die(_("Refusing to fetch into current branch %s "
805 "of non-bare repository"), current_branch->refname);
806}
807static int truncate_fetch_head(void)
809{
810 char *filename = git_path("FETCH_HEAD");
811 FILE *fp = fopen(filename, "w");
812 if (!fp)
814 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
815 fclose(fp);
816 return 0;
817}
818static void set_option(struct transport *transport, const char *name, const char *value)
820{
821 int r = transport_set_option(transport, name, value);
822 if (r < 0)
823 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
824 name, value, transport->url);
825 if (r > 0)
826 warning(_("Option \"%s\" is ignored for %s\n"),
827 name, transport->url);
828}
829static struct transport *prepare_transport(struct remote *remote)
831{
832 struct transport *transport;
833 transport = transport_get(remote, NULL);
834 transport_set_verbosity(transport, verbosity, progress);
835 if (upload_pack)
836 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
837 if (keep)
838 set_option(transport, TRANS_OPT_KEEP, "yes");
839 if (depth)
840 set_option(transport, TRANS_OPT_DEPTH, depth);
841 if (update_shallow)
842 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
843 return transport;
844}
845static void backfill_tags(struct transport *transport, struct ref *ref_map)
847{
848 if (transport->cannot_reuse) {
849 gsecondary = prepare_transport(transport->remote);
850 transport = gsecondary;
851 }
852 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
854 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
855 fetch_refs(transport, ref_map);
856 if (gsecondary) {
858 transport_disconnect(gsecondary);
859 gsecondary = NULL;
860 }
861}
862static int do_fetch(struct transport *transport,
864 struct refspec *refs, int ref_count)
865{
866 struct string_list existing_refs = STRING_LIST_INIT_DUP;
867 struct ref *ref_map;
868 struct ref *rm;
869 int autotags = (transport->remote->fetch_tags == 1);
870 int retcode = 0;
871 for_each_ref(add_existing, &existing_refs);
873 if (tags == TAGS_DEFAULT) {
875 if (transport->remote->fetch_tags == 2)
876 tags = TAGS_SET;
877 if (transport->remote->fetch_tags == -1)
878 tags = TAGS_UNSET;
879 }
880 if (!transport->get_refs_list || !transport->fetch)
882 die(_("Don't know how to fetch from %s"), transport->url);
883 /* if not appending, truncate FETCH_HEAD */
885 if (!append && !dry_run) {
886 retcode = truncate_fetch_head();
887 if (retcode)
888 goto cleanup;
889 }
890 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
892 if (!update_head_ok)
893 check_not_current_branch(ref_map);
894 for (rm = ref_map; rm; rm = rm->next) {
896 if (rm->peer_ref) {
897 struct string_list_item *peer_item =
898 string_list_lookup(&existing_refs,
899 rm->peer_ref->name);
900 if (peer_item)
901 hashcpy(rm->peer_ref->old_sha1,
902 peer_item->util);
903 }
904 }
905 if (tags == TAGS_DEFAULT && autotags)
907 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
908 if (prune) {
909 /*
910 * We only prune based on refspecs specified
911 * explicitly (via command line or configuration); we
912 * don't care whether --tags was specified.
913 */
914 if (ref_count) {
915 prune_refs(refs, ref_count, ref_map, transport->url);
916 } else {
917 prune_refs(transport->remote->fetch,
918 transport->remote->fetch_refspec_nr,
919 ref_map,
920 transport->url);
921 }
922 }
923 if (fetch_refs(transport, ref_map)) {
924 free_refs(ref_map);
925 retcode = 1;
926 goto cleanup;
927 }
928 free_refs(ref_map);
929 /* if neither --no-tags nor --tags was specified, do automated tag
931 * following ... */
932 if (tags == TAGS_DEFAULT && autotags) {
933 struct ref **tail = &ref_map;
934 ref_map = NULL;
935 find_non_local_tags(transport, &ref_map, &tail);
936 if (ref_map)
937 backfill_tags(transport, ref_map);
938 free_refs(ref_map);
939 }
940 cleanup:
942 string_list_clear(&existing_refs, 1);
943 return retcode;
944}
945static int get_one_remote_for_fetch(struct remote *remote, void *priv)
947{
948 struct string_list *list = priv;
949 if (!remote->skip_default_update)
950 string_list_append(list, remote->name);
951 return 0;
952}
953struct remote_group_data {
955 const char *name;
956 struct string_list *list;
957};
958static int get_remote_group(const char *key, const char *value, void *priv)
960{
961 struct remote_group_data *g = priv;
962 if (starts_with(key, "remotes.") &&
964 !strcmp(key + 8, g->name)) {
965 /* split list by white space */
966 int space = strcspn(value, " \t\n");
967 while (*value) {
968 if (space > 1) {
969 string_list_append(g->list,
970 xstrndup(value, space));
971 }
972 value += space + (value[space] != '\0');
973 space = strcspn(value, " \t\n");
974 }
975 }
976 return 0;
978}
979static int add_remote_or_group(const char *name, struct string_list *list)
981{
982 int prev_nr = list->nr;
983 struct remote_group_data g;
984 g.name = name; g.list = list;
985 git_config(get_remote_group, &g);
987 if (list->nr == prev_nr) {
988 struct remote *remote;
989 if (!remote_is_configured(name))
990 return 0;
991 remote = remote_get(name);
992 string_list_append(list, remote->name);
993 }
994 return 1;
995}
996static void add_options_to_argv(struct argv_array *argv)
998{
999 if (dry_run)
1000 argv_array_push(argv, "--dry-run");
1001 if (prune != -1)
1002 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1003 if (update_head_ok)
1004 argv_array_push(argv, "--update-head-ok");
1005 if (force)
1006 argv_array_push(argv, "--force");
1007 if (keep)
1008 argv_array_push(argv, "--keep");
1009 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1010 argv_array_push(argv, "--recurse-submodules");
1011 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1012 argv_array_push(argv, "--recurse-submodules=on-demand");
1013 if (tags == TAGS_SET)
1014 argv_array_push(argv, "--tags");
1015 else if (tags == TAGS_UNSET)
1016 argv_array_push(argv, "--no-tags");
1017 if (verbosity >= 2)
1018 argv_array_push(argv, "-v");
1019 if (verbosity >= 1)
1020 argv_array_push(argv, "-v");
1021 else if (verbosity < 0)
1022 argv_array_push(argv, "-q");
1023}
1025static int fetch_multiple(struct string_list *list)
1027{
1028 int i, result = 0;
1029 struct argv_array argv = ARGV_ARRAY_INIT;
1030 if (!append && !dry_run) {
1032 int errcode = truncate_fetch_head();
1033 if (errcode)
1034 return errcode;
1035 }
1036 argv_array_pushl(&argv, "fetch", "--append", NULL);
1038 add_options_to_argv(&argv);
1039 for (i = 0; i < list->nr; i++) {
1041 const char *name = list->items[i].string;
1042 argv_array_push(&argv, name);
1043 if (verbosity >= 0)
1044 printf(_("Fetching %s\n"), name);
1045 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1046 error(_("Could not fetch %s"), name);
1047 result = 1;
1048 }
1049 argv_array_pop(&argv);
1050 }
1051 argv_array_clear(&argv);
1053 return result;
1054}
1055static int fetch_one(struct remote *remote, int argc, const char **argv)
1057{
1058 static const char **refs = NULL;
1059 struct refspec *refspec;
1060 int ref_nr = 0;
1061 int exit_code;
1062 if (!remote)
1064 die(_("No remote repository specified. Please, specify either a URL or a\n"
1065 "remote name from which new revisions should be fetched."));
1066 gtransport = prepare_transport(remote);
1068 if (prune < 0) {
1070 /* no command line request */
1071 if (0 <= gtransport->remote->prune)
1072 prune = gtransport->remote->prune;
1073 else if (0 <= fetch_prune_config)
1074 prune = fetch_prune_config;
1075 else
1076 prune = PRUNE_BY_DEFAULT;
1077 }
1078 if (argc > 0) {
1080 int j = 0;
1081 int i;
1082 refs = xcalloc(argc + 1, sizeof(const char *));
1083 for (i = 0; i < argc; i++) {
1084 if (!strcmp(argv[i], "tag")) {
1085 char *ref;
1086 i++;
1087 if (i >= argc)
1088 die(_("You need to specify a tag name."));
1089 ref = xmalloc(strlen(argv[i]) * 2 + 22);
1090 strcpy(ref, "refs/tags/");
1091 strcat(ref, argv[i]);
1092 strcat(ref, ":refs/tags/");
1093 strcat(ref, argv[i]);
1094 refs[j++] = ref;
1095 } else
1096 refs[j++] = argv[i];
1097 }
1098 refs[j] = NULL;
1099 ref_nr = j;
1100 }
1101 sigchain_push_common(unlock_pack_on_signal);
1103 atexit(unlock_pack);
1104 refspec = parse_fetch_refspec(ref_nr, refs);
1105 exit_code = do_fetch(gtransport, refspec, ref_nr);
1106 free_refspec(ref_nr, refspec);
1107 transport_disconnect(gtransport);
1108 gtransport = NULL;
1109 return exit_code;
1110}
1111int cmd_fetch(int argc, const char **argv, const char *prefix)
1113{
1114 int i;
1115 struct string_list list = STRING_LIST_INIT_NODUP;
1116 struct remote *remote;
1117 int result = 0;
1118 static const char *argv_gc_auto[] = {
1119 "gc", "--auto", NULL,
1120 };
1121 packet_trace_identity("fetch");
1123 /* Record the command line for the reflog */
1125 strbuf_addstr(&default_rla, "fetch");
1126 for (i = 1; i < argc; i++)
1127 strbuf_addf(&default_rla, " %s", argv[i]);
1128 git_config(git_fetch_config, NULL);
1130 argc = parse_options(argc, argv, prefix,
1132 builtin_fetch_options, builtin_fetch_usage, 0);
1133 if (unshallow) {
1135 if (depth)
1136 die(_("--depth and --unshallow cannot be used together"));
1137 else if (!is_repository_shallow())
1138 die(_("--unshallow on a complete repository does not make sense"));
1139 else {
1140 static char inf_depth[12];
1141 sprintf(inf_depth, "%d", INFINITE_DEPTH);
1142 depth = inf_depth;
1143 }
1144 }
1145 /* no need to be strict, transport_set_option() will validate it again */
1147 if (depth && atoi(depth) < 1)
1148 die(_("depth %s is not a positive number"), depth);
1149 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1151 if (recurse_submodules_default) {
1152 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1153 set_config_fetch_recurse_submodules(arg);
1154 }
1155 gitmodules_config();
1156 git_config(submodule_config, NULL);
1157 }
1158 if (all) {
1160 if (argc == 1)
1161 die(_("fetch --all does not take a repository argument"));
1162 else if (argc > 1)
1163 die(_("fetch --all does not make sense with refspecs"));
1164 (void) for_each_remote(get_one_remote_for_fetch, &list);
1165 result = fetch_multiple(&list);
1166 } else if (argc == 0) {
1167 /* No arguments -- use default remote */
1168 remote = remote_get(NULL);
1169 result = fetch_one(remote, argc, argv);
1170 } else if (multiple) {
1171 /* All arguments are assumed to be remotes or groups */
1172 for (i = 0; i < argc; i++)
1173 if (!add_remote_or_group(argv[i], &list))
1174 die(_("No such remote or remote group: %s"), argv[i]);
1175 result = fetch_multiple(&list);
1176 } else {
1177 /* Single remote or group */
1178 (void) add_remote_or_group(argv[0], &list);
1179 if (list.nr > 1) {
1180 /* More than one remote */
1181 if (argc > 1)
1182 die(_("Fetching a group and specifying refspecs does not make sense"));
1183 result = fetch_multiple(&list);
1184 } else {
1185 /* Zero or one remotes */
1186 remote = remote_get(argv[0]);
1187 result = fetch_one(remote, argc-1, argv+1);
1188 }
1189 }
1190 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1192 struct argv_array options = ARGV_ARRAY_INIT;
1193 add_options_to_argv(&options);
1195 result = fetch_populated_submodules(&options,
1196 submodule_prefix,
1197 recurse_submodules,
1198 verbosity < 0);
1199 argv_array_clear(&options);
1200 }
1201 /* All names were strdup()ed or strndup()ed */
1203 list.strdup_strings = 1;
1204 string_list_clear(&list, 0);
1205 run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1207 return result;
1209}