9d58dc0a8af15d7da9999e74c1085957f0c7cd74
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"
18#include "utf8.h"
19static const char * const builtin_fetch_usage[] = {
21 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
22 N_("git fetch [<options>] <group>"),
23 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
24 N_("git fetch --all [<options>]"),
25 NULL
26};
27enum {
29 TAGS_UNSET = 0,
30 TAGS_DEFAULT = 1,
31 TAGS_SET = 2
32};
33static int fetch_prune_config = -1; /* unspecified */
35static int prune = -1; /* unspecified */
36#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
37static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
39static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
40static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
41static int max_children = -1;
42static enum transport_family family;
43static const char *depth;
44static const char *deepen_since;
45static const char *upload_pack;
46static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
47static struct strbuf default_rla = STRBUF_INIT;
48static struct transport *gtransport;
49static struct transport *gsecondary;
50static const char *submodule_prefix = "";
51static const char *recurse_submodules_default;
52static int shown_url = 0;
53static int refmap_alloc, refmap_nr;
54static const char **refmap_array;
55static int git_fetch_config(const char *k, const char *v, void *cb)
57{
58 if (!strcmp(k, "fetch.prune")) {
59 fetch_prune_config = git_config_bool(k, v);
60 return 0;
61 }
62 if (!strcmp(k, "submodule.recurse")) {
64 int r = git_config_bool(k, v) ?
65 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
66 recurse_submodules = r;
67 }
68 return git_default_config(k, v, cb);
70}
71static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
73{
74 ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
75 /*
77 * "git fetch --refmap='' origin foo"
78 * can be used to tell the command not to store anywhere
79 */
80 if (*arg)
81 refmap_array[refmap_nr++] = arg;
82 return 0;
83}
84static struct option builtin_fetch_options[] = {
86 OPT__VERBOSITY(&verbosity),
87 OPT_BOOL(0, "all", &all,
88 N_("fetch from all remotes")),
89 OPT_BOOL('a', "append", &append,
90 N_("append to .git/FETCH_HEAD instead of overwriting")),
91 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
92 N_("path to upload pack on remote end")),
93 OPT__FORCE(&force, N_("force overwrite of local branch")),
94 OPT_BOOL('m', "multiple", &multiple,
95 N_("fetch from multiple remotes")),
96 OPT_SET_INT('t', "tags", &tags,
97 N_("fetch all tags and associated objects"), TAGS_SET),
98 OPT_SET_INT('n', NULL, &tags,
99 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
100 OPT_INTEGER('j', "jobs", &max_children,
101 N_("number of submodules fetched in parallel")),
102 OPT_BOOL('p', "prune", &prune,
103 N_("prune remote-tracking branches no longer on remote")),
104 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
105 N_("control recursive fetching of submodules"),
106 PARSE_OPT_OPTARG, option_fetch_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 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
116 N_("deepen history of shallow repository based on time")),
117 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
118 N_("deepen history of shallow clone, excluding rev")),
119 OPT_INTEGER(0, "deepen", &deepen_relative,
120 N_("deepen history of shallow clone")),
121 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
122 N_("convert to a complete repository"),
123 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
124 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
125 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
126 { OPTION_STRING, 0, "recurse-submodules-default",
127 &recurse_submodules_default, NULL,
128 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
129 OPT_BOOL(0, "update-shallow", &update_shallow,
130 N_("accept refs that update .git/shallow")),
131 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
132 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
133 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
134 TRANSPORT_FAMILY_IPV4),
135 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
136 TRANSPORT_FAMILY_IPV6),
137 OPT_END()
138};
139static void unlock_pack(void)
141{
142 if (gtransport)
143 transport_unlock_pack(gtransport);
144 if (gsecondary)
145 transport_unlock_pack(gsecondary);
146}
147static void unlock_pack_on_signal(int signo)
149{
150 unlock_pack();
151 sigchain_pop(signo);
152 raise(signo);
153}
154static void add_merge_config(struct ref **head,
156 const struct ref *remote_refs,
157 struct branch *branch,
158 struct ref ***tail)
159{
160 int i;
161 for (i = 0; i < branch->merge_nr; i++) {
163 struct ref *rm, **old_tail = *tail;
164 struct refspec refspec;
165 for (rm = *head; rm; rm = rm->next) {
167 if (branch_merge_matches(branch, i, rm->name)) {
168 rm->fetch_head_status = FETCH_HEAD_MERGE;
169 break;
170 }
171 }
172 if (rm)
173 continue;
174 /*
176 * Not fetched to a remote-tracking branch? We need to fetch
177 * it anyway to allow this branch's "branch.$name.merge"
178 * to be honored by 'git pull', but we do not have to
179 * fail if branch.$name.merge is misconfigured to point
180 * at a nonexisting branch. If we were indeed called by
181 * 'git pull', it will notice the misconfiguration because
182 * there is no entry in the resulting FETCH_HEAD marked
183 * for merging.
184 */
185 memset(&refspec, 0, sizeof(refspec));
186 refspec.src = branch->merge[i]->src;
187 get_fetch_map(remote_refs, &refspec, tail, 1);
188 for (rm = *old_tail; rm; rm = rm->next)
189 rm->fetch_head_status = FETCH_HEAD_MERGE;
190 }
191}
192static int add_existing(const char *refname, const struct object_id *oid,
194 int flag, void *cbdata)
195{
196 struct string_list *list = (struct string_list *)cbdata;
197 struct string_list_item *item = string_list_insert(list, refname);
198 struct object_id *old_oid = xmalloc(sizeof(*old_oid));
199 oidcpy(old_oid, oid);
201 item->util = old_oid;
202 return 0;
203}
204static int will_fetch(struct ref **head, const unsigned char *sha1)
206{
207 struct ref *rm = *head;
208 while (rm) {
209 if (!hashcmp(rm->old_oid.hash, sha1))
210 return 1;
211 rm = rm->next;
212 }
213 return 0;
214}
215static void find_non_local_tags(struct transport *transport,
217 struct ref **head,
218 struct ref ***tail)
219{
220 struct string_list existing_refs = STRING_LIST_INIT_DUP;
221 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
222 const struct ref *ref;
223 struct string_list_item *item = NULL;
224 for_each_ref(add_existing, &existing_refs);
226 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
227 if (!starts_with(ref->name, "refs/tags/"))
228 continue;
229 /*
231 * The peeled ref always follows the matching base
232 * ref, so if we see a peeled ref that we don't want
233 * to fetch then we can mark the ref entry in the list
234 * as one to ignore by setting util to NULL.
235 */
236 if (ends_with(ref->name, "^{}")) {
237 if (item &&
238 !has_object_file_with_flags(&ref->old_oid, HAS_SHA1_QUICK) &&
239 !will_fetch(head, ref->old_oid.hash) &&
240 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
241 !will_fetch(head, item->util))
242 item->util = NULL;
243 item = NULL;
244 continue;
245 }
246 /*
248 * If item is non-NULL here, then we previously saw a
249 * ref not followed by a peeled reference, so we need
250 * to check if it is a lightweight tag that we want to
251 * fetch.
252 */
253 if (item &&
254 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
255 !will_fetch(head, item->util))
256 item->util = NULL;
257 item = NULL;
259 /* skip duplicates and refs that we already have */
261 if (string_list_has_string(&remote_refs, ref->name) ||
262 string_list_has_string(&existing_refs, ref->name))
263 continue;
264 item = string_list_insert(&remote_refs, ref->name);
266 item->util = (void *)&ref->old_oid;
267 }
268 string_list_clear(&existing_refs, 1);
269 /*
271 * We may have a final lightweight tag that needs to be
272 * checked to see if it needs fetching.
273 */
274 if (item &&
275 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
276 !will_fetch(head, item->util))
277 item->util = NULL;
278 /*
280 * For all the tags in the remote_refs string list,
281 * add them to the list of refs to be fetched
282 */
283 for_each_string_list_item(item, &remote_refs) {
284 /* Unless we have already decided to ignore this item... */
285 if (item->util)
286 {
287 struct ref *rm = alloc_ref(item->string);
288 rm->peer_ref = alloc_ref(item->string);
289 oidcpy(&rm->old_oid, item->util);
290 **tail = rm;
291 *tail = &rm->next;
292 }
293 }
294 string_list_clear(&remote_refs, 0);
296}
297static struct ref *get_ref_map(struct transport *transport,
299 struct refspec *refspecs, int refspec_count,
300 int tags, int *autotags)
301{
302 int i;
303 struct ref *rm;
304 struct ref *ref_map = NULL;
305 struct ref **tail = &ref_map;
306 /* opportunistically-updated references: */
308 struct ref *orefs = NULL, **oref_tail = &orefs;
309 const struct ref *remote_refs = transport_get_remote_refs(transport);
311 if (refspec_count) {
313 struct refspec *fetch_refspec;
314 int fetch_refspec_nr;
315 for (i = 0; i < refspec_count; i++) {
317 get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
318 if (refspecs[i].dst && refspecs[i].dst[0])
319 *autotags = 1;
320 }
321 /* Merge everything on the command line (but not --tags) */
322 for (rm = ref_map; rm; rm = rm->next)
323 rm->fetch_head_status = FETCH_HEAD_MERGE;
324 /*
326 * For any refs that we happen to be fetching via
327 * command-line arguments, the destination ref might
328 * have been missing or have been different than the
329 * remote-tracking ref that would be derived from the
330 * configured refspec. In these cases, we want to
331 * take the opportunity to update their configured
332 * remote-tracking reference. However, we do not want
333 * to mention these entries in FETCH_HEAD at all, as
334 * they would simply be duplicates of existing
335 * entries, so we set them FETCH_HEAD_IGNORE below.
336 *
337 * We compute these entries now, based only on the
338 * refspecs specified on the command line. But we add
339 * them to the list following the refspecs resulting
340 * from the tags option so that one of the latter,
341 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
342 * by ref_remove_duplicates() in favor of one of these
343 * opportunistic entries with FETCH_HEAD_IGNORE.
344 */
345 if (refmap_array) {
346 fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
347 fetch_refspec_nr = refmap_nr;
348 } else {
349 fetch_refspec = transport->remote->fetch;
350 fetch_refspec_nr = transport->remote->fetch_refspec_nr;
351 }
352 for (i = 0; i < fetch_refspec_nr; i++)
354 get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
355 } else if (refmap_array) {
356 die("--refmap option is only meaningful with command-line refspec(s).");
357 } else {
358 /* Use the defaults */
359 struct remote *remote = transport->remote;
360 struct branch *branch = branch_get(NULL);
361 int has_merge = branch_has_merge_config(branch);
362 if (remote &&
363 (remote->fetch_refspec_nr ||
364 /* Note: has_merge implies non-NULL branch->remote_name */
365 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
366 for (i = 0; i < remote->fetch_refspec_nr; i++) {
367 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
368 if (remote->fetch[i].dst &&
369 remote->fetch[i].dst[0])
370 *autotags = 1;
371 if (!i && !has_merge && ref_map &&
372 !remote->fetch[0].pattern)
373 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
374 }
375 /*
376 * if the remote we're fetching from is the same
377 * as given in branch.<name>.remote, we add the
378 * ref given in branch.<name>.merge, too.
379 *
380 * Note: has_merge implies non-NULL branch->remote_name
381 */
382 if (has_merge &&
383 !strcmp(branch->remote_name, remote->name))
384 add_merge_config(&ref_map, remote_refs, branch, &tail);
385 } else {
386 ref_map = get_remote_ref(remote_refs, "HEAD");
387 if (!ref_map)
388 die(_("Couldn't find remote ref HEAD"));
389 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
390 tail = &ref_map->next;
391 }
392 }
393 if (tags == TAGS_SET)
395 /* also fetch all tags */
396 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
397 else if (tags == TAGS_DEFAULT && *autotags)
398 find_non_local_tags(transport, &ref_map, &tail);
399 /* Now append any refs to be updated opportunistically: */
401 *tail = orefs;
402 for (rm = orefs; rm; rm = rm->next) {
403 rm->fetch_head_status = FETCH_HEAD_IGNORE;
404 tail = &rm->next;
405 }
406 return ref_remove_duplicates(ref_map);
408}
409#define STORE_REF_ERROR_OTHER 1
411#define STORE_REF_ERROR_DF_CONFLICT 2
412static int s_update_ref(const char *action,
414 struct ref *ref,
415 int check_old)
416{
417 char *msg;
418 char *rla = getenv("GIT_REFLOG_ACTION");
419 struct ref_transaction *transaction;
420 struct strbuf err = STRBUF_INIT;
421 int ret, df_conflict = 0;
422 if (dry_run)
424 return 0;
425 if (!rla)
426 rla = default_rla.buf;
427 msg = xstrfmt("%s: %s", rla, action);
428 transaction = ref_transaction_begin(&err);
430 if (!transaction ||
431 ref_transaction_update(transaction, ref->name,
432 ref->new_oid.hash,
433 check_old ? ref->old_oid.hash : NULL,
434 0, msg, &err))
435 goto fail;
436 ret = ref_transaction_commit(transaction, &err);
438 if (ret) {
439 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
440 goto fail;
441 }
442 ref_transaction_free(transaction);
444 strbuf_release(&err);
445 free(msg);
446 return 0;
447fail:
448 ref_transaction_free(transaction);
449 error("%s", err.buf);
450 strbuf_release(&err);
451 free(msg);
452 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
453 : STORE_REF_ERROR_OTHER;
454}
455static int refcol_width = 10;
457static int compact_format;
458static void adjust_refcol_width(const struct ref *ref)
460{
461 int max, rlen, llen, len;
462 /* uptodate lines are only shown on high verbosity level */
464 if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
465 return;
466 max = term_columns();
468 rlen = utf8_strwidth(prettify_refname(ref->name));
469 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
471 /*
473 * rough estimation to see if the output line is too long and
474 * should not be counted (we can't do precise calculation
475 * anyway because we don't know if the error explanation part
476 * will be printed in update_local_ref)
477 */
478 if (compact_format) {
479 llen = 0;
480 max = max * 2 / 3;
481 }
482 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
483 if (len >= max)
484 return;
485 /*
487 * Not precise calculation for compact mode because '*' can
488 * appear on the left hand side of '->' and shrink the column
489 * back.
490 */
491 if (refcol_width < rlen)
492 refcol_width = rlen;
493}
494static void prepare_format_display(struct ref *ref_map)
496{
497 struct ref *rm;
498 const char *format = "full";
499 git_config_get_string_const("fetch.output", &format);
501 if (!strcasecmp(format, "full"))
502 compact_format = 0;
503 else if (!strcasecmp(format, "compact"))
504 compact_format = 1;
505 else
506 die(_("configuration fetch.output contains invalid value %s"),
507 format);
508 for (rm = ref_map; rm; rm = rm->next) {
510 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
511 !rm->peer_ref ||
512 !strcmp(rm->name, "HEAD"))
513 continue;
514 adjust_refcol_width(rm);
516 }
517}
518static void print_remote_to_local(struct strbuf *display,
520 const char *remote, const char *local)
521{
522 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
523}
524static int find_and_replace(struct strbuf *haystack,
526 const char *needle,
527 const char *placeholder)
528{
529 const char *p = strstr(haystack->buf, needle);
530 int plen, nlen;
531 if (!p)
533 return 0;
534 if (p > haystack->buf && p[-1] != '/')
536 return 0;
537 plen = strlen(p);
539 nlen = strlen(needle);
540 if (plen > nlen && p[nlen] != '/')
541 return 0;
542 strbuf_splice(haystack, p - haystack->buf, nlen,
544 placeholder, strlen(placeholder));
545 return 1;
546}
547static void print_compact(struct strbuf *display,
549 const char *remote, const char *local)
550{
551 struct strbuf r = STRBUF_INIT;
552 struct strbuf l = STRBUF_INIT;
553 if (!strcmp(remote, local)) {
555 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
556 return;
557 }
558 strbuf_addstr(&r, remote);
560 strbuf_addstr(&l, local);
561 if (!find_and_replace(&r, local, "*"))
563 find_and_replace(&l, remote, "*");
564 print_remote_to_local(display, r.buf, l.buf);
565 strbuf_release(&r);
567 strbuf_release(&l);
568}
569static void format_display(struct strbuf *display, char code,
571 const char *summary, const char *error,
572 const char *remote, const char *local,
573 int summary_width)
574{
575 int width = (summary_width + strlen(summary) - gettext_width(summary));
576 strbuf_addf(display, "%c %-*s ", code, width, summary);
578 if (!compact_format)
579 print_remote_to_local(display, remote, local);
580 else
581 print_compact(display, remote, local);
582 if (error)
583 strbuf_addf(display, " (%s)", error);
584}
585static int update_local_ref(struct ref *ref,
587 const char *remote,
588 const struct ref *remote_ref,
589 struct strbuf *display,
590 int summary_width)
591{
592 struct commit *current = NULL, *updated;
593 enum object_type type;
594 struct branch *current_branch = branch_get(NULL);
595 const char *pretty_ref = prettify_refname(ref->name);
596 type = sha1_object_info(ref->new_oid.hash, NULL);
598 if (type < 0)
599 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
600 if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
602 if (verbosity > 0)
603 format_display(display, '=', _("[up to date]"), NULL,
604 remote, pretty_ref, summary_width);
605 return 0;
606 }
607 if (current_branch &&
609 !strcmp(ref->name, current_branch->name) &&
610 !(update_head_ok || is_bare_repository()) &&
611 !is_null_oid(&ref->old_oid)) {
612 /*
613 * If this is the head, and it's not okay to update
614 * the head, and the old value of the head isn't empty...
615 */
616 format_display(display, '!', _("[rejected]"),
617 _("can't fetch in current branch"),
618 remote, pretty_ref, summary_width);
619 return 1;
620 }
621 if (!is_null_oid(&ref->old_oid) &&
623 starts_with(ref->name, "refs/tags/")) {
624 int r;
625 r = s_update_ref("updating tag", ref, 0);
626 format_display(display, r ? '!' : 't', _("[tag update]"),
627 r ? _("unable to update local ref") : NULL,
628 remote, pretty_ref, summary_width);
629 return r;
630 }
631 current = lookup_commit_reference_gently(&ref->old_oid, 1);
633 updated = lookup_commit_reference_gently(&ref->new_oid, 1);
634 if (!current || !updated) {
635 const char *msg;
636 const char *what;
637 int r;
638 /*
639 * Nicely describe the new ref we're fetching.
640 * Base this on the remote's ref name, as it's
641 * more likely to follow a standard layout.
642 */
643 const char *name = remote_ref ? remote_ref->name : "";
644 if (starts_with(name, "refs/tags/")) {
645 msg = "storing tag";
646 what = _("[new tag]");
647 } else if (starts_with(name, "refs/heads/")) {
648 msg = "storing head";
649 what = _("[new branch]");
650 } else {
651 msg = "storing ref";
652 what = _("[new ref]");
653 }
654 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
656 (recurse_submodules != RECURSE_SUBMODULES_ON))
657 check_for_new_submodule_commits(&ref->new_oid);
658 r = s_update_ref(msg, ref, 0);
659 format_display(display, r ? '!' : '*', what,
660 r ? _("unable to update local ref") : NULL,
661 remote, pretty_ref, summary_width);
662 return r;
663 }
664 if (in_merge_bases(current, updated)) {
666 struct strbuf quickref = STRBUF_INIT;
667 int r;
668 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
669 strbuf_addstr(&quickref, "..");
670 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
671 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
672 (recurse_submodules != RECURSE_SUBMODULES_ON))
673 check_for_new_submodule_commits(&ref->new_oid);
674 r = s_update_ref("fast-forward", ref, 1);
675 format_display(display, r ? '!' : ' ', quickref.buf,
676 r ? _("unable to update local ref") : NULL,
677 remote, pretty_ref, summary_width);
678 strbuf_release(&quickref);
679 return r;
680 } else if (force || ref->force) {
681 struct strbuf quickref = STRBUF_INIT;
682 int r;
683 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
684 strbuf_addstr(&quickref, "...");
685 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
686 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
687 (recurse_submodules != RECURSE_SUBMODULES_ON))
688 check_for_new_submodule_commits(&ref->new_oid);
689 r = s_update_ref("forced-update", ref, 1);
690 format_display(display, r ? '!' : '+', quickref.buf,
691 r ? _("unable to update local ref") : _("forced update"),
692 remote, pretty_ref, summary_width);
693 strbuf_release(&quickref);
694 return r;
695 } else {
696 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
697 remote, pretty_ref, summary_width);
698 return 1;
699 }
700}
701static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
703{
704 struct ref **rm = cb_data;
705 struct ref *ref = *rm;
706 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
708 ref = ref->next;
709 if (!ref)
710 return -1; /* end of the list */
711 *rm = ref->next;
712 hashcpy(sha1, ref->old_oid.hash);
713 return 0;
714}
715static int store_updated_refs(const char *raw_url, const char *remote_name,
717 struct ref *ref_map)
718{
719 FILE *fp;
720 struct commit *commit;
721 int url_len, i, rc = 0;
722 struct strbuf note = STRBUF_INIT;
723 const char *what, *kind;
724 struct ref *rm;
725 char *url;
726 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
727 int want_status;
728 int summary_width = transport_summary_width(ref_map);
729 fp = fopen(filename, "a");
731 if (!fp)
732 return error_errno(_("cannot open %s"), filename);
733 if (raw_url)
735 url = transport_anonymize_url(raw_url);
736 else
737 url = xstrdup("foreign");
738 rm = ref_map;
740 if (check_connected(iterate_ref_map, &rm, NULL)) {
741 rc = error(_("%s did not send all necessary objects\n"), url);
742 goto abort;
743 }
744 prepare_format_display(ref_map);
746 /*
748 * We do a pass for each fetch_head_status type in their enum order, so
749 * merged entries are written before not-for-merge. That lets readers
750 * use FETCH_HEAD as a refname to refer to the ref to be merged.
751 */
752 for (want_status = FETCH_HEAD_MERGE;
753 want_status <= FETCH_HEAD_IGNORE;
754 want_status++) {
755 for (rm = ref_map; rm; rm = rm->next) {
756 struct ref *ref = NULL;
757 const char *merge_status_marker = "";
758 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
760 if (want_status == FETCH_HEAD_MERGE)
761 warning(_("reject %s because shallow roots are not allowed to be updated"),
762 rm->peer_ref ? rm->peer_ref->name : rm->name);
763 continue;
764 }
765 commit = lookup_commit_reference_gently(&rm->old_oid,
767 1);
768 if (!commit)
769 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
770 if (rm->fetch_head_status != want_status)
772 continue;
773 if (rm->peer_ref) {
775 ref = alloc_ref(rm->peer_ref->name);
776 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
777 oidcpy(&ref->new_oid, &rm->old_oid);
778 ref->force = rm->peer_ref->force;
779 }
780 if (!strcmp(rm->name, "HEAD")) {
783 kind = "";
784 what = "";
785 }
786 else if (starts_with(rm->name, "refs/heads/")) {
787 kind = "branch";
788 what = rm->name + 11;
789 }
790 else if (starts_with(rm->name, "refs/tags/")) {
791 kind = "tag";
792 what = rm->name + 10;
793 }
794 else if (starts_with(rm->name, "refs/remotes/")) {
795 kind = "remote-tracking branch";
796 what = rm->name + 13;
797 }
798 else {
799 kind = "";
800 what = rm->name;
801 }
802 url_len = strlen(url);
804 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
805 ;
806 url_len = i + 1;
807 if (4 < i && !strncmp(".git", url + i - 3, 4))
808 url_len = i - 3;
809 strbuf_reset(¬e);
811 if (*what) {
812 if (*kind)
813 strbuf_addf(¬e, "%s ", kind);
814 strbuf_addf(¬e, "'%s' of ", what);
815 }
816 switch (rm->fetch_head_status) {
817 case FETCH_HEAD_NOT_FOR_MERGE:
818 merge_status_marker = "not-for-merge";
819 /* fall-through */
820 case FETCH_HEAD_MERGE:
821 fprintf(fp, "%s\t%s\t%s",
822 oid_to_hex(&rm->old_oid),
823 merge_status_marker,
824 note.buf);
825 for (i = 0; i < url_len; ++i)
826 if ('\n' == url[i])
827 fputs("\\n", fp);
828 else
829 fputc(url[i], fp);
830 fputc('\n', fp);
831 break;
832 default:
833 /* do not write anything to FETCH_HEAD */
834 break;
835 }
836 strbuf_reset(¬e);
838 if (ref) {
839 rc |= update_local_ref(ref, what, rm, ¬e,
840 summary_width);
841 free(ref);
842 } else
843 format_display(¬e, '*',
844 *kind ? kind : "branch", NULL,
845 *what ? what : "HEAD",
846 "FETCH_HEAD", summary_width);
847 if (note.len) {
848 if (verbosity >= 0 && !shown_url) {
849 fprintf(stderr, _("From %.*s\n"),
850 url_len, url);
851 shown_url = 1;
852 }
853 if (verbosity >= 0)
854 fprintf(stderr, " %s\n", note.buf);
855 }
856 }
857 }
858 if (rc & STORE_REF_ERROR_DF_CONFLICT)
860 error(_("some local refs could not be updated; try running\n"
861 " 'git remote prune %s' to remove any old, conflicting "
862 "branches"), remote_name);
863 abort:
865 strbuf_release(¬e);
866 free(url);
867 fclose(fp);
868 return rc;
869}
870/*
872 * We would want to bypass the object transfer altogether if
873 * everything we are going to fetch already exists and is connected
874 * locally.
875 */
876static int quickfetch(struct ref *ref_map)
877{
878 struct ref *rm = ref_map;
879 struct check_connected_options opt = CHECK_CONNECTED_INIT;
880 /*
882 * If we are deepening a shallow clone we already have these
883 * objects reachable. Running rev-list here will return with
884 * a good (0) exit status and we'll bypass the fetch that we
885 * really need to perform. Claiming failure now will ensure
886 * we perform the network exchange to deepen our history.
887 */
888 if (deepen)
889 return -1;
890 opt.quiet = 1;
891 return check_connected(iterate_ref_map, &rm, &opt);
892}
893static int fetch_refs(struct transport *transport, struct ref *ref_map)
895{
896 int ret = quickfetch(ref_map);
897 if (ret)
898 ret = transport_fetch_refs(transport, ref_map);
899 if (!ret)
900 ret |= store_updated_refs(transport->url,
901 transport->remote->name,
902 ref_map);
903 transport_unlock_pack(transport);
904 return ret;
905}
906static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
908 const char *raw_url)
909{
910 int url_len, i, result = 0;
911 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
912 char *url;
913 int summary_width = transport_summary_width(stale_refs);
914 const char *dangling_msg = dry_run
915 ? _(" (%s will become dangling)")
916 : _(" (%s has become dangling)");
917 if (raw_url)
919 url = transport_anonymize_url(raw_url);
920 else
921 url = xstrdup("foreign");
922 url_len = strlen(url);
924 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
925 ;
926 url_len = i + 1;
928 if (4 < i && !strncmp(".git", url + i - 3, 4))
929 url_len = i - 3;
930 if (!dry_run) {
932 struct string_list refnames = STRING_LIST_INIT_NODUP;
933 for (ref = stale_refs; ref; ref = ref->next)
935 string_list_append(&refnames, ref->name);
936 result = delete_refs("fetch: prune", &refnames, 0);
938 string_list_clear(&refnames, 0);
939 }
940 if (verbosity >= 0) {
942 for (ref = stale_refs; ref; ref = ref->next) {
943 struct strbuf sb = STRBUF_INIT;
944 if (!shown_url) {
945 fprintf(stderr, _("From %.*s\n"), url_len, url);
946 shown_url = 1;
947 }
948 format_display(&sb, '-', _("[deleted]"), NULL,
949 _("(none)"), prettify_refname(ref->name),
950 summary_width);
951 fprintf(stderr, " %s\n",sb.buf);
952 strbuf_release(&sb);
953 warn_dangling_symref(stderr, dangling_msg, ref->name);
954 }
955 }
956 free(url);
958 free_refs(stale_refs);
959 return result;
960}
961static void check_not_current_branch(struct ref *ref_map)
963{
964 struct branch *current_branch = branch_get(NULL);
965 if (is_bare_repository() || !current_branch)
967 return;
968 for (; ref_map; ref_map = ref_map->next)
970 if (ref_map->peer_ref && !strcmp(current_branch->refname,
971 ref_map->peer_ref->name))
972 die(_("Refusing to fetch into current branch %s "
973 "of non-bare repository"), current_branch->refname);
974}
975static int truncate_fetch_head(void)
977{
978 const char *filename = git_path_fetch_head();
979 FILE *fp = fopen_for_writing(filename);
980 if (!fp)
982 return error_errno(_("cannot open %s"), filename);
983 fclose(fp);
984 return 0;
985}
986static void set_option(struct transport *transport, const char *name, const char *value)
988{
989 int r = transport_set_option(transport, name, value);
990 if (r < 0)
991 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
992 name, value, transport->url);
993 if (r > 0)
994 warning(_("Option \"%s\" is ignored for %s\n"),
995 name, transport->url);
996}
997static struct transport *prepare_transport(struct remote *remote, int deepen)
999{
1000 struct transport *transport;
1001 transport = transport_get(remote, NULL);
1002 transport_set_verbosity(transport, verbosity, progress);
1003 transport->family = family;
1004 if (upload_pack)
1005 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1006 if (keep)
1007 set_option(transport, TRANS_OPT_KEEP, "yes");
1008 if (depth)
1009 set_option(transport, TRANS_OPT_DEPTH, depth);
1010 if (deepen && deepen_since)
1011 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1012 if (deepen && deepen_not.nr)
1013 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1014 (const char *)&deepen_not);
1015 if (deepen_relative)
1016 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1017 if (update_shallow)
1018 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1019 return transport;
1020}
1021static void backfill_tags(struct transport *transport, struct ref *ref_map)
1023{
1024 int cannot_reuse;
1025 /*
1027 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1028 * when remote helper is used (setting it to an empty string
1029 * is not unsetting). We could extend the remote helper
1030 * protocol for that, but for now, just force a new connection
1031 * without deepen-since. Similar story for deepen-not.
1032 */
1033 cannot_reuse = transport->cannot_reuse ||
1034 deepen_since || deepen_not.nr;
1035 if (cannot_reuse) {
1036 gsecondary = prepare_transport(transport->remote, 0);
1037 transport = gsecondary;
1038 }
1039 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1041 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1042 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1043 fetch_refs(transport, ref_map);
1044 if (gsecondary) {
1046 transport_disconnect(gsecondary);
1047 gsecondary = NULL;
1048 }
1049}
1050static int do_fetch(struct transport *transport,
1052 struct refspec *refs, int ref_count)
1053{
1054 struct string_list existing_refs = STRING_LIST_INIT_DUP;
1055 struct ref *ref_map;
1056 struct ref *rm;
1057 int autotags = (transport->remote->fetch_tags == 1);
1058 int retcode = 0;
1059 for_each_ref(add_existing, &existing_refs);
1061 if (tags == TAGS_DEFAULT) {
1063 if (transport->remote->fetch_tags == 2)
1064 tags = TAGS_SET;
1065 if (transport->remote->fetch_tags == -1)
1066 tags = TAGS_UNSET;
1067 }
1068 if (!transport->get_refs_list || !transport->fetch)
1070 die(_("Don't know how to fetch from %s"), transport->url);
1071 /* if not appending, truncate FETCH_HEAD */
1073 if (!append && !dry_run) {
1074 retcode = truncate_fetch_head();
1075 if (retcode)
1076 goto cleanup;
1077 }
1078 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1080 if (!update_head_ok)
1081 check_not_current_branch(ref_map);
1082 for (rm = ref_map; rm; rm = rm->next) {
1084 if (rm->peer_ref) {
1085 struct string_list_item *peer_item =
1086 string_list_lookup(&existing_refs,
1087 rm->peer_ref->name);
1088 if (peer_item) {
1089 struct object_id *old_oid = peer_item->util;
1090 oidcpy(&rm->peer_ref->old_oid, old_oid);
1091 }
1092 }
1093 }
1094 if (tags == TAGS_DEFAULT && autotags)
1096 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1097 if (prune) {
1098 /*
1099 * We only prune based on refspecs specified
1100 * explicitly (via command line or configuration); we
1101 * don't care whether --tags was specified.
1102 */
1103 if (ref_count) {
1104 prune_refs(refs, ref_count, ref_map, transport->url);
1105 } else {
1106 prune_refs(transport->remote->fetch,
1107 transport->remote->fetch_refspec_nr,
1108 ref_map,
1109 transport->url);
1110 }
1111 }
1112 if (fetch_refs(transport, ref_map)) {
1113 free_refs(ref_map);
1114 retcode = 1;
1115 goto cleanup;
1116 }
1117 free_refs(ref_map);
1118 /* if neither --no-tags nor --tags was specified, do automated tag
1120 * following ... */
1121 if (tags == TAGS_DEFAULT && autotags) {
1122 struct ref **tail = &ref_map;
1123 ref_map = NULL;
1124 find_non_local_tags(transport, &ref_map, &tail);
1125 if (ref_map)
1126 backfill_tags(transport, ref_map);
1127 free_refs(ref_map);
1128 }
1129 cleanup:
1131 string_list_clear(&existing_refs, 1);
1132 return retcode;
1133}
1134static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1136{
1137 struct string_list *list = priv;
1138 if (!remote->skip_default_update)
1139 string_list_append(list, remote->name);
1140 return 0;
1141}
1142struct remote_group_data {
1144 const char *name;
1145 struct string_list *list;
1146};
1147static int get_remote_group(const char *key, const char *value, void *priv)
1149{
1150 struct remote_group_data *g = priv;
1151 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1153 /* split list by white space */
1154 while (*value) {
1155 size_t wordlen = strcspn(value, " \t\n");
1156 if (wordlen >= 1)
1158 string_list_append_nodup(g->list,
1159 xstrndup(value, wordlen));
1160 value += wordlen + (value[wordlen] != '\0');
1161 }
1162 }
1163 return 0;
1165}
1166static int add_remote_or_group(const char *name, struct string_list *list)
1168{
1169 int prev_nr = list->nr;
1170 struct remote_group_data g;
1171 g.name = name; g.list = list;
1172 git_config(get_remote_group, &g);
1174 if (list->nr == prev_nr) {
1175 struct remote *remote = remote_get(name);
1176 if (!remote_is_configured(remote, 0))
1177 return 0;
1178 string_list_append(list, remote->name);
1179 }
1180 return 1;
1181}
1182static void add_options_to_argv(struct argv_array *argv)
1184{
1185 if (dry_run)
1186 argv_array_push(argv, "--dry-run");
1187 if (prune != -1)
1188 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1189 if (update_head_ok)
1190 argv_array_push(argv, "--update-head-ok");
1191 if (force)
1192 argv_array_push(argv, "--force");
1193 if (keep)
1194 argv_array_push(argv, "--keep");
1195 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1196 argv_array_push(argv, "--recurse-submodules");
1197 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1198 argv_array_push(argv, "--recurse-submodules=on-demand");
1199 if (tags == TAGS_SET)
1200 argv_array_push(argv, "--tags");
1201 else if (tags == TAGS_UNSET)
1202 argv_array_push(argv, "--no-tags");
1203 if (verbosity >= 2)
1204 argv_array_push(argv, "-v");
1205 if (verbosity >= 1)
1206 argv_array_push(argv, "-v");
1207 else if (verbosity < 0)
1208 argv_array_push(argv, "-q");
1209}
1211static int fetch_multiple(struct string_list *list)
1213{
1214 int i, result = 0;
1215 struct argv_array argv = ARGV_ARRAY_INIT;
1216 if (!append && !dry_run) {
1218 int errcode = truncate_fetch_head();
1219 if (errcode)
1220 return errcode;
1221 }
1222 argv_array_pushl(&argv, "fetch", "--append", NULL);
1224 add_options_to_argv(&argv);
1225 for (i = 0; i < list->nr; i++) {
1227 const char *name = list->items[i].string;
1228 argv_array_push(&argv, name);
1229 if (verbosity >= 0)
1230 printf(_("Fetching %s\n"), name);
1231 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1232 error(_("Could not fetch %s"), name);
1233 result = 1;
1234 }
1235 argv_array_pop(&argv);
1236 }
1237 argv_array_clear(&argv);
1239 return result;
1240}
1241static int fetch_one(struct remote *remote, int argc, const char **argv)
1243{
1244 static const char **refs = NULL;
1245 struct refspec *refspec;
1246 int ref_nr = 0;
1247 int exit_code;
1248 if (!remote)
1250 die(_("No remote repository specified. Please, specify either a URL or a\n"
1251 "remote name from which new revisions should be fetched."));
1252 gtransport = prepare_transport(remote, 1);
1254 if (prune < 0) {
1256 /* no command line request */
1257 if (0 <= gtransport->remote->prune)
1258 prune = gtransport->remote->prune;
1259 else if (0 <= fetch_prune_config)
1260 prune = fetch_prune_config;
1261 else
1262 prune = PRUNE_BY_DEFAULT;
1263 }
1264 if (argc > 0) {
1266 int j = 0;
1267 int i;
1268 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1269 for (i = 0; i < argc; i++) {
1270 if (!strcmp(argv[i], "tag")) {
1271 i++;
1272 if (i >= argc)
1273 die(_("You need to specify a tag name."));
1274 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1275 argv[i], argv[i]);
1276 } else
1277 refs[j++] = argv[i];
1278 }
1279 refs[j] = NULL;
1280 ref_nr = j;
1281 }
1282 sigchain_push_common(unlock_pack_on_signal);
1284 atexit(unlock_pack);
1285 refspec = parse_fetch_refspec(ref_nr, refs);
1286 exit_code = do_fetch(gtransport, refspec, ref_nr);
1287 free_refspec(ref_nr, refspec);
1288 transport_disconnect(gtransport);
1289 gtransport = NULL;
1290 return exit_code;
1291}
1292int cmd_fetch(int argc, const char **argv, const char *prefix)
1294{
1295 int i;
1296 struct string_list list = STRING_LIST_INIT_DUP;
1297 struct remote *remote;
1298 int result = 0;
1299 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1300 packet_trace_identity("fetch");
1302 /* Record the command line for the reflog */
1304 strbuf_addstr(&default_rla, "fetch");
1305 for (i = 1; i < argc; i++)
1306 strbuf_addf(&default_rla, " %s", argv[i]);
1307 git_config(git_fetch_config, NULL);
1309 argc = parse_options(argc, argv, prefix,
1311 builtin_fetch_options, builtin_fetch_usage, 0);
1312 if (deepen_relative) {
1314 if (deepen_relative < 0)
1315 die(_("Negative depth in --deepen is not supported"));
1316 if (depth)
1317 die(_("--deepen and --depth are mutually exclusive"));
1318 depth = xstrfmt("%d", deepen_relative);
1319 }
1320 if (unshallow) {
1321 if (depth)
1322 die(_("--depth and --unshallow cannot be used together"));
1323 else if (!is_repository_shallow())
1324 die(_("--unshallow on a complete repository does not make sense"));
1325 else
1326 depth = xstrfmt("%d", INFINITE_DEPTH);
1327 }
1328 /* no need to be strict, transport_set_option() will validate it again */
1330 if (depth && atoi(depth) < 1)
1331 die(_("depth %s is not a positive number"), depth);
1332 if (depth || deepen_since || deepen_not.nr)
1333 deepen = 1;
1334 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1336 if (recurse_submodules_default) {
1337 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1338 set_config_fetch_recurse_submodules(arg);
1339 }
1340 gitmodules_config();
1341 git_config(submodule_config, NULL);
1342 }
1343 if (all) {
1345 if (argc == 1)
1346 die(_("fetch --all does not take a repository argument"));
1347 else if (argc > 1)
1348 die(_("fetch --all does not make sense with refspecs"));
1349 (void) for_each_remote(get_one_remote_for_fetch, &list);
1350 result = fetch_multiple(&list);
1351 } else if (argc == 0) {
1352 /* No arguments -- use default remote */
1353 remote = remote_get(NULL);
1354 result = fetch_one(remote, argc, argv);
1355 } else if (multiple) {
1356 /* All arguments are assumed to be remotes or groups */
1357 for (i = 0; i < argc; i++)
1358 if (!add_remote_or_group(argv[i], &list))
1359 die(_("No such remote or remote group: %s"), argv[i]);
1360 result = fetch_multiple(&list);
1361 } else {
1362 /* Single remote or group */
1363 (void) add_remote_or_group(argv[0], &list);
1364 if (list.nr > 1) {
1365 /* More than one remote */
1366 if (argc > 1)
1367 die(_("Fetching a group and specifying refspecs does not make sense"));
1368 result = fetch_multiple(&list);
1369 } else {
1370 /* Zero or one remotes */
1371 remote = remote_get(argv[0]);
1372 result = fetch_one(remote, argc-1, argv+1);
1373 }
1374 }
1375 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1377 struct argv_array options = ARGV_ARRAY_INIT;
1378 add_options_to_argv(&options);
1380 result = fetch_populated_submodules(&options,
1381 submodule_prefix,
1382 recurse_submodules,
1383 verbosity < 0,
1384 max_children);
1385 argv_array_clear(&options);
1386 }
1387 string_list_clear(&list, 0);
1389 close_all_packs();
1391 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1393 if (verbosity < 0)
1394 argv_array_push(&argv_gc_auto, "--quiet");
1395 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1396 argv_array_clear(&argv_gc_auto);
1397 return result;
1399}