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 option_parse_recurse_submodules(const struct option *opt,
57 const char *arg, int unset)
58{
59 if (unset) {
60 recurse_submodules = RECURSE_SUBMODULES_OFF;
61 } else {
62 if (arg)
63 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
64 else
65 recurse_submodules = RECURSE_SUBMODULES_ON;
66 }
67 return 0;
68}
69static int git_fetch_config(const char *k, const char *v, void *cb)
71{
72 if (!strcmp(k, "fetch.prune")) {
73 fetch_prune_config = git_config_bool(k, v);
74 return 0;
75 }
76 return git_default_config(k, v, cb);
77}
78static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
80{
81 ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
82 /*
84 * "git fetch --refmap='' origin foo"
85 * can be used to tell the command not to store anywhere
86 */
87 if (*arg)
88 refmap_array[refmap_nr++] = arg;
89 return 0;
90}
91static struct option builtin_fetch_options[] = {
93 OPT__VERBOSITY(&verbosity),
94 OPT_BOOL(0, "all", &all,
95 N_("fetch from all remotes")),
96 OPT_BOOL('a', "append", &append,
97 N_("append to .git/FETCH_HEAD instead of overwriting")),
98 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
99 N_("path to upload pack on remote end")),
100 OPT__FORCE(&force, N_("force overwrite of local branch")),
101 OPT_BOOL('m', "multiple", &multiple,
102 N_("fetch from multiple remotes")),
103 OPT_SET_INT('t', "tags", &tags,
104 N_("fetch all tags and associated objects"), TAGS_SET),
105 OPT_SET_INT('n', NULL, &tags,
106 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
107 OPT_INTEGER('j', "jobs", &max_children,
108 N_("number of submodules fetched in parallel")),
109 OPT_BOOL('p', "prune", &prune,
110 N_("prune remote-tracking branches no longer on remote")),
111 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
112 N_("control recursive fetching of submodules"),
113 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
114 OPT_BOOL(0, "dry-run", &dry_run,
115 N_("dry run")),
116 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
117 OPT_BOOL('u', "update-head-ok", &update_head_ok,
118 N_("allow updating of HEAD ref")),
119 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
120 OPT_STRING(0, "depth", &depth, N_("depth"),
121 N_("deepen history of shallow clone")),
122 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
123 N_("deepen history of shallow repository based on time")),
124 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
125 N_("deepen history of shallow clone by excluding rev")),
126 OPT_INTEGER(0, "deepen", &deepen_relative,
127 N_("deepen history of shallow clone")),
128 { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
129 N_("convert to a complete repository"),
130 PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
131 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
132 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
133 { OPTION_STRING, 0, "recurse-submodules-default",
134 &recurse_submodules_default, NULL,
135 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
136 OPT_BOOL(0, "update-shallow", &update_shallow,
137 N_("accept refs that update .git/shallow")),
138 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
139 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
140 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
141 TRANSPORT_FAMILY_IPV4),
142 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
143 TRANSPORT_FAMILY_IPV6),
144 OPT_END()
145};
146static void unlock_pack(void)
148{
149 if (gtransport)
150 transport_unlock_pack(gtransport);
151 if (gsecondary)
152 transport_unlock_pack(gsecondary);
153}
154static void unlock_pack_on_signal(int signo)
156{
157 unlock_pack();
158 sigchain_pop(signo);
159 raise(signo);
160}
161static void add_merge_config(struct ref **head,
163 const struct ref *remote_refs,
164 struct branch *branch,
165 struct ref ***tail)
166{
167 int i;
168 for (i = 0; i < branch->merge_nr; i++) {
170 struct ref *rm, **old_tail = *tail;
171 struct refspec refspec;
172 for (rm = *head; rm; rm = rm->next) {
174 if (branch_merge_matches(branch, i, rm->name)) {
175 rm->fetch_head_status = FETCH_HEAD_MERGE;
176 break;
177 }
178 }
179 if (rm)
180 continue;
181 /*
183 * Not fetched to a remote-tracking branch? We need to fetch
184 * it anyway to allow this branch's "branch.$name.merge"
185 * to be honored by 'git pull', but we do not have to
186 * fail if branch.$name.merge is misconfigured to point
187 * at a nonexisting branch. If we were indeed called by
188 * 'git pull', it will notice the misconfiguration because
189 * there is no entry in the resulting FETCH_HEAD marked
190 * for merging.
191 */
192 memset(&refspec, 0, sizeof(refspec));
193 refspec.src = branch->merge[i]->src;
194 get_fetch_map(remote_refs, &refspec, tail, 1);
195 for (rm = *old_tail; rm; rm = rm->next)
196 rm->fetch_head_status = FETCH_HEAD_MERGE;
197 }
198}
199static int add_existing(const char *refname, const struct object_id *oid,
201 int flag, void *cbdata)
202{
203 struct string_list *list = (struct string_list *)cbdata;
204 struct string_list_item *item = string_list_insert(list, refname);
205 struct object_id *old_oid = xmalloc(sizeof(*old_oid));
206 oidcpy(old_oid, oid);
208 item->util = old_oid;
209 return 0;
210}
211static int will_fetch(struct ref **head, const unsigned char *sha1)
213{
214 struct ref *rm = *head;
215 while (rm) {
216 if (!hashcmp(rm->old_oid.hash, sha1))
217 return 1;
218 rm = rm->next;
219 }
220 return 0;
221}
222static void find_non_local_tags(struct transport *transport,
224 struct ref **head,
225 struct ref ***tail)
226{
227 struct string_list existing_refs = STRING_LIST_INIT_DUP;
228 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
229 const struct ref *ref;
230 struct string_list_item *item = NULL;
231 for_each_ref(add_existing, &existing_refs);
233 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
234 if (!starts_with(ref->name, "refs/tags/"))
235 continue;
236 /*
238 * The peeled ref always follows the matching base
239 * ref, so if we see a peeled ref that we don't want
240 * to fetch then we can mark the ref entry in the list
241 * as one to ignore by setting util to NULL.
242 */
243 if (ends_with(ref->name, "^{}")) {
244 if (item &&
245 !has_object_file_with_flags(&ref->old_oid, HAS_SHA1_QUICK) &&
246 !will_fetch(head, ref->old_oid.hash) &&
247 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
248 !will_fetch(head, item->util))
249 item->util = NULL;
250 item = NULL;
251 continue;
252 }
253 /*
255 * If item is non-NULL here, then we previously saw a
256 * ref not followed by a peeled reference, so we need
257 * to check if it is a lightweight tag that we want to
258 * fetch.
259 */
260 if (item &&
261 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
262 !will_fetch(head, item->util))
263 item->util = NULL;
264 item = NULL;
266 /* skip duplicates and refs that we already have */
268 if (string_list_has_string(&remote_refs, ref->name) ||
269 string_list_has_string(&existing_refs, ref->name))
270 continue;
271 item = string_list_insert(&remote_refs, ref->name);
273 item->util = (void *)&ref->old_oid;
274 }
275 string_list_clear(&existing_refs, 1);
276 /*
278 * We may have a final lightweight tag that needs to be
279 * checked to see if it needs fetching.
280 */
281 if (item &&
282 !has_sha1_file_with_flags(item->util, HAS_SHA1_QUICK) &&
283 !will_fetch(head, item->util))
284 item->util = NULL;
285 /*
287 * For all the tags in the remote_refs string list,
288 * add them to the list of refs to be fetched
289 */
290 for_each_string_list_item(item, &remote_refs) {
291 /* Unless we have already decided to ignore this item... */
292 if (item->util)
293 {
294 struct ref *rm = alloc_ref(item->string);
295 rm->peer_ref = alloc_ref(item->string);
296 oidcpy(&rm->old_oid, item->util);
297 **tail = rm;
298 *tail = &rm->next;
299 }
300 }
301 string_list_clear(&remote_refs, 0);
303}
304static struct ref *get_ref_map(struct transport *transport,
306 struct refspec *refspecs, int refspec_count,
307 int tags, int *autotags)
308{
309 int i;
310 struct ref *rm;
311 struct ref *ref_map = NULL;
312 struct ref **tail = &ref_map;
313 /* opportunistically-updated references: */
315 struct ref *orefs = NULL, **oref_tail = &orefs;
316 const struct ref *remote_refs = transport_get_remote_refs(transport);
318 if (refspec_count) {
320 struct refspec *fetch_refspec;
321 int fetch_refspec_nr;
322 for (i = 0; i < refspec_count; i++) {
324 get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
325 if (refspecs[i].dst && refspecs[i].dst[0])
326 *autotags = 1;
327 }
328 /* Merge everything on the command line (but not --tags) */
329 for (rm = ref_map; rm; rm = rm->next)
330 rm->fetch_head_status = FETCH_HEAD_MERGE;
331 /*
333 * For any refs that we happen to be fetching via
334 * command-line arguments, the destination ref might
335 * have been missing or have been different than the
336 * remote-tracking ref that would be derived from the
337 * configured refspec. In these cases, we want to
338 * take the opportunity to update their configured
339 * remote-tracking reference. However, we do not want
340 * to mention these entries in FETCH_HEAD at all, as
341 * they would simply be duplicates of existing
342 * entries, so we set them FETCH_HEAD_IGNORE below.
343 *
344 * We compute these entries now, based only on the
345 * refspecs specified on the command line. But we add
346 * them to the list following the refspecs resulting
347 * from the tags option so that one of the latter,
348 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
349 * by ref_remove_duplicates() in favor of one of these
350 * opportunistic entries with FETCH_HEAD_IGNORE.
351 */
352 if (refmap_array) {
353 fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
354 fetch_refspec_nr = refmap_nr;
355 } else {
356 fetch_refspec = transport->remote->fetch;
357 fetch_refspec_nr = transport->remote->fetch_refspec_nr;
358 }
359 for (i = 0; i < fetch_refspec_nr; i++)
361 get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
362 if (tags == TAGS_SET)
364 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
365 } else if (refmap_array) {
366 die("--refmap option is only meaningful with command-line refspec(s).");
367 } else {
368 /* Use the defaults */
369 struct remote *remote = transport->remote;
370 struct branch *branch = branch_get(NULL);
371 int has_merge = branch_has_merge_config(branch);
372 if (remote &&
373 (remote->fetch_refspec_nr ||
374 /* Note: has_merge implies non-NULL branch->remote_name */
375 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
376 for (i = 0; i < remote->fetch_refspec_nr; i++) {
377 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
378 if (remote->fetch[i].dst &&
379 remote->fetch[i].dst[0])
380 *autotags = 1;
381 if (!i && !has_merge && ref_map &&
382 !remote->fetch[0].pattern)
383 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
384 }
385 /*
386 * if the remote we're fetching from is the same
387 * as given in branch.<name>.remote, we add the
388 * ref given in branch.<name>.merge, too.
389 *
390 * Note: has_merge implies non-NULL branch->remote_name
391 */
392 if (has_merge &&
393 !strcmp(branch->remote_name, remote->name))
394 add_merge_config(&ref_map, remote_refs, branch, &tail);
395 } else {
396 ref_map = get_remote_ref(remote_refs, "HEAD");
397 if (!ref_map)
398 die(_("Couldn't find remote ref HEAD"));
399 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
400 tail = &ref_map->next;
401 }
402 }
403 if (tags == TAGS_SET)
405 /* also fetch all tags */
406 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
407 else if (tags == TAGS_DEFAULT && *autotags)
408 find_non_local_tags(transport, &ref_map, &tail);
409 /* Now append any refs to be updated opportunistically: */
411 *tail = orefs;
412 for (rm = orefs; rm; rm = rm->next) {
413 rm->fetch_head_status = FETCH_HEAD_IGNORE;
414 tail = &rm->next;
415 }
416 return ref_remove_duplicates(ref_map);
418}
419#define STORE_REF_ERROR_OTHER 1
421#define STORE_REF_ERROR_DF_CONFLICT 2
422static int s_update_ref(const char *action,
424 struct ref *ref,
425 int check_old)
426{
427 char msg[1024];
428 char *rla = getenv("GIT_REFLOG_ACTION");
429 struct ref_transaction *transaction;
430 struct strbuf err = STRBUF_INIT;
431 int ret, df_conflict = 0;
432 if (dry_run)
434 return 0;
435 if (!rla)
436 rla = default_rla.buf;
437 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
438 transaction = ref_transaction_begin(&err);
440 if (!transaction ||
441 ref_transaction_update(transaction, ref->name,
442 ref->new_oid.hash,
443 check_old ? ref->old_oid.hash : NULL,
444 0, msg, &err))
445 goto fail;
446 ret = ref_transaction_commit(transaction, &err);
448 if (ret) {
449 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
450 goto fail;
451 }
452 ref_transaction_free(transaction);
454 strbuf_release(&err);
455 return 0;
456fail:
457 ref_transaction_free(transaction);
458 error("%s", err.buf);
459 strbuf_release(&err);
460 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
461 : STORE_REF_ERROR_OTHER;
462}
463static int refcol_width = 10;
465static int compact_format;
466static void adjust_refcol_width(const struct ref *ref)
468{
469 int max, rlen, llen, len;
470 /* uptodate lines are only shown on high verbosity level */
472 if (!verbosity && !oidcmp(&ref->peer_ref->old_oid, &ref->old_oid))
473 return;
474 max = term_columns();
476 rlen = utf8_strwidth(prettify_refname(ref->name));
477 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
479 /*
481 * rough estimation to see if the output line is too long and
482 * should not be counted (we can't do precise calculation
483 * anyway because we don't know if the error explanation part
484 * will be printed in update_local_ref)
485 */
486 if (compact_format) {
487 llen = 0;
488 max = max * 2 / 3;
489 }
490 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
491 if (len >= max)
492 return;
493 /*
495 * Not precise calculation for compact mode because '*' can
496 * appear on the left hand side of '->' and shrink the column
497 * back.
498 */
499 if (refcol_width < rlen)
500 refcol_width = rlen;
501}
502static void prepare_format_display(struct ref *ref_map)
504{
505 struct ref *rm;
506 const char *format = "full";
507 git_config_get_string_const("fetch.output", &format);
509 if (!strcasecmp(format, "full"))
510 compact_format = 0;
511 else if (!strcasecmp(format, "compact"))
512 compact_format = 1;
513 else
514 die(_("configuration fetch.output contains invalid value %s"),
515 format);
516 for (rm = ref_map; rm; rm = rm->next) {
518 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
519 !rm->peer_ref ||
520 !strcmp(rm->name, "HEAD"))
521 continue;
522 adjust_refcol_width(rm);
524 }
525}
526static void print_remote_to_local(struct strbuf *display,
528 const char *remote, const char *local)
529{
530 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
531}
532static int find_and_replace(struct strbuf *haystack,
534 const char *needle,
535 const char *placeholder)
536{
537 const char *p = strstr(haystack->buf, needle);
538 int plen, nlen;
539 if (!p)
541 return 0;
542 if (p > haystack->buf && p[-1] != '/')
544 return 0;
545 plen = strlen(p);
547 nlen = strlen(needle);
548 if (plen > nlen && p[nlen] != '/')
549 return 0;
550 strbuf_splice(haystack, p - haystack->buf, nlen,
552 placeholder, strlen(placeholder));
553 return 1;
554}
555static void print_compact(struct strbuf *display,
557 const char *remote, const char *local)
558{
559 struct strbuf r = STRBUF_INIT;
560 struct strbuf l = STRBUF_INIT;
561 if (!strcmp(remote, local)) {
563 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
564 return;
565 }
566 strbuf_addstr(&r, remote);
568 strbuf_addstr(&l, local);
569 if (!find_and_replace(&r, local, "*"))
571 find_and_replace(&l, remote, "*");
572 print_remote_to_local(display, r.buf, l.buf);
573 strbuf_release(&r);
575 strbuf_release(&l);
576}
577static void format_display(struct strbuf *display, char code,
579 const char *summary, const char *error,
580 const char *remote, const char *local)
581{
582 strbuf_addf(display, "%c %-*s ", code, TRANSPORT_SUMMARY(summary));
583 if (!compact_format)
584 print_remote_to_local(display, remote, local);
585 else
586 print_compact(display, remote, local);
587 if (error)
588 strbuf_addf(display, " (%s)", error);
589}
590static int update_local_ref(struct ref *ref,
592 const char *remote,
593 const struct ref *remote_ref,
594 struct strbuf *display)
595{
596 struct commit *current = NULL, *updated;
597 enum object_type type;
598 struct branch *current_branch = branch_get(NULL);
599 const char *pretty_ref = prettify_refname(ref->name);
600 type = sha1_object_info(ref->new_oid.hash, NULL);
602 if (type < 0)
603 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
604 if (!oidcmp(&ref->old_oid, &ref->new_oid)) {
606 if (verbosity > 0)
607 format_display(display, '=', _("[up to date]"), NULL,
608 remote, pretty_ref);
609 return 0;
610 }
611 if (current_branch &&
613 !strcmp(ref->name, current_branch->name) &&
614 !(update_head_ok || is_bare_repository()) &&
615 !is_null_oid(&ref->old_oid)) {
616 /*
617 * If this is the head, and it's not okay to update
618 * the head, and the old value of the head isn't empty...
619 */
620 format_display(display, '!', _("[rejected]"),
621 _("can't fetch in current branch"),
622 remote, pretty_ref);
623 return 1;
624 }
625 if (!is_null_oid(&ref->old_oid) &&
627 starts_with(ref->name, "refs/tags/")) {
628 int r;
629 r = s_update_ref("updating tag", ref, 0);
630 format_display(display, r ? '!' : 't', _("[tag update]"),
631 r ? _("unable to update local ref") : NULL,
632 remote, pretty_ref);
633 return r;
634 }
635 current = lookup_commit_reference_gently(ref->old_oid.hash, 1);
637 updated = lookup_commit_reference_gently(ref->new_oid.hash, 1);
638 if (!current || !updated) {
639 const char *msg;
640 const char *what;
641 int r;
642 /*
643 * Nicely describe the new ref we're fetching.
644 * Base this on the remote's ref name, as it's
645 * more likely to follow a standard layout.
646 */
647 const char *name = remote_ref ? remote_ref->name : "";
648 if (starts_with(name, "refs/tags/")) {
649 msg = "storing tag";
650 what = _("[new tag]");
651 } else if (starts_with(name, "refs/heads/")) {
652 msg = "storing head";
653 what = _("[new branch]");
654 } else {
655 msg = "storing ref";
656 what = _("[new ref]");
657 }
658 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
660 (recurse_submodules != RECURSE_SUBMODULES_ON))
661 check_for_new_submodule_commits(ref->new_oid.hash);
662 r = s_update_ref(msg, ref, 0);
663 format_display(display, r ? '!' : '*', what,
664 r ? _("unable to update local ref") : NULL,
665 remote, pretty_ref);
666 return r;
667 }
668 if (in_merge_bases(current, updated)) {
670 struct strbuf quickref = STRBUF_INIT;
671 int r;
672 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
673 strbuf_addstr(&quickref, "..");
674 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
675 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
676 (recurse_submodules != RECURSE_SUBMODULES_ON))
677 check_for_new_submodule_commits(ref->new_oid.hash);
678 r = s_update_ref("fast-forward", ref, 1);
679 format_display(display, r ? '!' : ' ', quickref.buf,
680 r ? _("unable to update local ref") : NULL,
681 remote, pretty_ref);
682 strbuf_release(&quickref);
683 return r;
684 } else if (force || ref->force) {
685 struct strbuf quickref = STRBUF_INIT;
686 int r;
687 strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
688 strbuf_addstr(&quickref, "...");
689 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
690 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
691 (recurse_submodules != RECURSE_SUBMODULES_ON))
692 check_for_new_submodule_commits(ref->new_oid.hash);
693 r = s_update_ref("forced-update", ref, 1);
694 format_display(display, r ? '!' : '+', quickref.buf,
695 r ? _("unable to update local ref") : _("forced update"),
696 remote, pretty_ref);
697 strbuf_release(&quickref);
698 return r;
699 } else {
700 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
701 remote, pretty_ref);
702 return 1;
703 }
704}
705static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
707{
708 struct ref **rm = cb_data;
709 struct ref *ref = *rm;
710 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
712 ref = ref->next;
713 if (!ref)
714 return -1; /* end of the list */
715 *rm = ref->next;
716 hashcpy(sha1, ref->old_oid.hash);
717 return 0;
718}
719static int store_updated_refs(const char *raw_url, const char *remote_name,
721 struct ref *ref_map)
722{
723 FILE *fp;
724 struct commit *commit;
725 int url_len, i, rc = 0;
726 struct strbuf note = STRBUF_INIT;
727 const char *what, *kind;
728 struct ref *rm;
729 char *url;
730 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head();
731 int want_status;
732 fp = fopen(filename, "a");
734 if (!fp)
735 return error_errno(_("cannot open %s"), filename);
736 if (raw_url)
738 url = transport_anonymize_url(raw_url);
739 else
740 url = xstrdup("foreign");
741 rm = ref_map;
743 if (check_connected(iterate_ref_map, &rm, NULL)) {
744 rc = error(_("%s did not send all necessary objects\n"), url);
745 goto abort;
746 }
747 prepare_format_display(ref_map);
749 /*
751 * We do a pass for each fetch_head_status type in their enum order, so
752 * merged entries are written before not-for-merge. That lets readers
753 * use FETCH_HEAD as a refname to refer to the ref to be merged.
754 */
755 for (want_status = FETCH_HEAD_MERGE;
756 want_status <= FETCH_HEAD_IGNORE;
757 want_status++) {
758 for (rm = ref_map; rm; rm = rm->next) {
759 struct ref *ref = NULL;
760 const char *merge_status_marker = "";
761 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
763 if (want_status == FETCH_HEAD_MERGE)
764 warning(_("reject %s because shallow roots are not allowed to be updated"),
765 rm->peer_ref ? rm->peer_ref->name : rm->name);
766 continue;
767 }
768 commit = lookup_commit_reference_gently(rm->old_oid.hash, 1);
770 if (!commit)
771 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
772 if (rm->fetch_head_status != want_status)
774 continue;
775 if (rm->peer_ref) {
777 ref = alloc_ref(rm->peer_ref->name);
778 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
779 oidcpy(&ref->new_oid, &rm->old_oid);
780 ref->force = rm->peer_ref->force;
781 }
782 if (!strcmp(rm->name, "HEAD")) {
785 kind = "";
786 what = "";
787 }
788 else if (starts_with(rm->name, "refs/heads/")) {
789 kind = "branch";
790 what = rm->name + 11;
791 }
792 else if (starts_with(rm->name, "refs/tags/")) {
793 kind = "tag";
794 what = rm->name + 10;
795 }
796 else if (starts_with(rm->name, "refs/remotes/")) {
797 kind = "remote-tracking branch";
798 what = rm->name + 13;
799 }
800 else {
801 kind = "";
802 what = rm->name;
803 }
804 url_len = strlen(url);
806 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
807 ;
808 url_len = i + 1;
809 if (4 < i && !strncmp(".git", url + i - 3, 4))
810 url_len = i - 3;
811 strbuf_reset(¬e);
813 if (*what) {
814 if (*kind)
815 strbuf_addf(¬e, "%s ", kind);
816 strbuf_addf(¬e, "'%s' of ", what);
817 }
818 switch (rm->fetch_head_status) {
819 case FETCH_HEAD_NOT_FOR_MERGE:
820 merge_status_marker = "not-for-merge";
821 /* fall-through */
822 case FETCH_HEAD_MERGE:
823 fprintf(fp, "%s\t%s\t%s",
824 oid_to_hex(&rm->old_oid),
825 merge_status_marker,
826 note.buf);
827 for (i = 0; i < url_len; ++i)
828 if ('\n' == url[i])
829 fputs("\\n", fp);
830 else
831 fputc(url[i], fp);
832 fputc('\n', fp);
833 break;
834 default:
835 /* do not write anything to FETCH_HEAD */
836 break;
837 }
838 strbuf_reset(¬e);
840 if (ref) {
841 rc |= update_local_ref(ref, what, rm, ¬e);
842 free(ref);
843 } else
844 format_display(¬e, '*',
845 *kind ? kind : "branch", NULL,
846 *what ? what : "HEAD",
847 "FETCH_HEAD");
848 if (note.len) {
849 if (verbosity >= 0 && !shown_url) {
850 fprintf(stderr, _("From %.*s\n"),
851 url_len, url);
852 shown_url = 1;
853 }
854 if (verbosity >= 0)
855 fprintf(stderr, " %s\n", note.buf);
856 }
857 }
858 }
859 if (rc & STORE_REF_ERROR_DF_CONFLICT)
861 error(_("some local refs could not be updated; try running\n"
862 " 'git remote prune %s' to remove any old, conflicting "
863 "branches"), remote_name);
864 abort:
866 strbuf_release(¬e);
867 free(url);
868 fclose(fp);
869 return rc;
870}
871/*
873 * We would want to bypass the object transfer altogether if
874 * everything we are going to fetch already exists and is connected
875 * locally.
876 */
877static int quickfetch(struct ref *ref_map)
878{
879 struct ref *rm = ref_map;
880 struct check_connected_options opt = CHECK_CONNECTED_INIT;
881 /*
883 * If we are deepening a shallow clone we already have these
884 * objects reachable. Running rev-list here will return with
885 * a good (0) exit status and we'll bypass the fetch that we
886 * really need to perform. Claiming failure now will ensure
887 * we perform the network exchange to deepen our history.
888 */
889 if (deepen)
890 return -1;
891 opt.quiet = 1;
892 return check_connected(iterate_ref_map, &rm, &opt);
893}
894static int fetch_refs(struct transport *transport, struct ref *ref_map)
896{
897 int ret = quickfetch(ref_map);
898 if (ret)
899 ret = transport_fetch_refs(transport, ref_map);
900 if (!ret)
901 ret |= store_updated_refs(transport->url,
902 transport->remote->name,
903 ref_map);
904 transport_unlock_pack(transport);
905 return ret;
906}
907static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
909 const char *raw_url)
910{
911 int url_len, i, result = 0;
912 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
913 char *url;
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(&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 fprintf(stderr, " %s\n",sb.buf);
951 strbuf_release(&sb);
952 warn_dangling_symref(stderr, dangling_msg, ref->name);
953 }
954 }
955 free(url);
957 free_refs(stale_refs);
958 return result;
959}
960static void check_not_current_branch(struct ref *ref_map)
962{
963 struct branch *current_branch = branch_get(NULL);
964 if (is_bare_repository() || !current_branch)
966 return;
967 for (; ref_map; ref_map = ref_map->next)
969 if (ref_map->peer_ref && !strcmp(current_branch->refname,
970 ref_map->peer_ref->name))
971 die(_("Refusing to fetch into current branch %s "
972 "of non-bare repository"), current_branch->refname);
973}
974static int truncate_fetch_head(void)
976{
977 const char *filename = git_path_fetch_head();
978 FILE *fp = fopen_for_writing(filename);
979 if (!fp)
981 return error_errno(_("cannot open %s"), filename);
982 fclose(fp);
983 return 0;
984}
985static void set_option(struct transport *transport, const char *name, const char *value)
987{
988 int r = transport_set_option(transport, name, value);
989 if (r < 0)
990 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
991 name, value, transport->url);
992 if (r > 0)
993 warning(_("Option \"%s\" is ignored for %s\n"),
994 name, transport->url);
995}
996static struct transport *prepare_transport(struct remote *remote, int deepen)
998{
999 struct transport *transport;
1000 transport = transport_get(remote, NULL);
1001 transport_set_verbosity(transport, verbosity, progress);
1002 transport->family = family;
1003 if (upload_pack)
1004 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1005 if (keep)
1006 set_option(transport, TRANS_OPT_KEEP, "yes");
1007 if (depth)
1008 set_option(transport, TRANS_OPT_DEPTH, depth);
1009 if (deepen && deepen_since)
1010 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1011 if (deepen && deepen_not.nr)
1012 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1013 (const char *)&deepen_not);
1014 if (deepen_relative)
1015 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1016 if (update_shallow)
1017 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1018 return transport;
1019}
1020static void backfill_tags(struct transport *transport, struct ref *ref_map)
1022{
1023 int cannot_reuse;
1024 /*
1026 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1027 * when remote helper is used (setting it to an empty string
1028 * is not unsetting). We could extend the remote helper
1029 * protocol for that, but for now, just force a new connection
1030 * without deepen-since. Similar story for deepen-not.
1031 */
1032 cannot_reuse = transport->cannot_reuse ||
1033 deepen_since || deepen_not.nr;
1034 if (cannot_reuse) {
1035 gsecondary = prepare_transport(transport->remote, 0);
1036 transport = gsecondary;
1037 }
1038 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1040 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1041 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1042 fetch_refs(transport, ref_map);
1043 if (gsecondary) {
1045 transport_disconnect(gsecondary);
1046 gsecondary = NULL;
1047 }
1048}
1049static int do_fetch(struct transport *transport,
1051 struct refspec *refs, int ref_count)
1052{
1053 struct string_list existing_refs = STRING_LIST_INIT_DUP;
1054 struct ref *ref_map;
1055 struct ref *rm;
1056 int autotags = (transport->remote->fetch_tags == 1);
1057 int retcode = 0;
1058 for_each_ref(add_existing, &existing_refs);
1060 if (tags == TAGS_DEFAULT) {
1062 if (transport->remote->fetch_tags == 2)
1063 tags = TAGS_SET;
1064 if (transport->remote->fetch_tags == -1)
1065 tags = TAGS_UNSET;
1066 }
1067 if (!transport->get_refs_list || !transport->fetch)
1069 die(_("Don't know how to fetch from %s"), transport->url);
1070 /* if not appending, truncate FETCH_HEAD */
1072 if (!append && !dry_run) {
1073 retcode = truncate_fetch_head();
1074 if (retcode)
1075 goto cleanup;
1076 }
1077 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
1079 if (!update_head_ok)
1080 check_not_current_branch(ref_map);
1081 for (rm = ref_map; rm; rm = rm->next) {
1083 if (rm->peer_ref) {
1084 struct string_list_item *peer_item =
1085 string_list_lookup(&existing_refs,
1086 rm->peer_ref->name);
1087 if (peer_item) {
1088 struct object_id *old_oid = peer_item->util;
1089 oidcpy(&rm->peer_ref->old_oid, old_oid);
1090 }
1091 }
1092 }
1093 if (tags == TAGS_DEFAULT && autotags)
1095 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1096 if (prune) {
1097 /*
1098 * We only prune based on refspecs specified
1099 * explicitly (via command line or configuration); we
1100 * don't care whether --tags was specified.
1101 */
1102 if (ref_count) {
1103 prune_refs(refs, ref_count, ref_map, transport->url);
1104 } else {
1105 prune_refs(transport->remote->fetch,
1106 transport->remote->fetch_refspec_nr,
1107 ref_map,
1108 transport->url);
1109 }
1110 }
1111 if (fetch_refs(transport, ref_map)) {
1112 free_refs(ref_map);
1113 retcode = 1;
1114 goto cleanup;
1115 }
1116 free_refs(ref_map);
1117 /* if neither --no-tags nor --tags was specified, do automated tag
1119 * following ... */
1120 if (tags == TAGS_DEFAULT && autotags) {
1121 struct ref **tail = &ref_map;
1122 ref_map = NULL;
1123 find_non_local_tags(transport, &ref_map, &tail);
1124 if (ref_map)
1125 backfill_tags(transport, ref_map);
1126 free_refs(ref_map);
1127 }
1128 cleanup:
1130 string_list_clear(&existing_refs, 1);
1131 return retcode;
1132}
1133static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1135{
1136 struct string_list *list = priv;
1137 if (!remote->skip_default_update)
1138 string_list_append(list, remote->name);
1139 return 0;
1140}
1141struct remote_group_data {
1143 const char *name;
1144 struct string_list *list;
1145};
1146static int get_remote_group(const char *key, const char *value, void *priv)
1148{
1149 struct remote_group_data *g = priv;
1150 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1152 /* split list by white space */
1153 while (*value) {
1154 size_t wordlen = strcspn(value, " \t\n");
1155 if (wordlen >= 1)
1157 string_list_append_nodup(g->list,
1158 xstrndup(value, wordlen));
1159 value += wordlen + (value[wordlen] != '\0');
1160 }
1161 }
1162 return 0;
1164}
1165static int add_remote_or_group(const char *name, struct string_list *list)
1167{
1168 int prev_nr = list->nr;
1169 struct remote_group_data g;
1170 g.name = name; g.list = list;
1171 git_config(get_remote_group, &g);
1173 if (list->nr == prev_nr) {
1174 struct remote *remote = remote_get(name);
1175 if (!remote_is_configured(remote))
1176 return 0;
1177 string_list_append(list, remote->name);
1178 }
1179 return 1;
1180}
1181static void add_options_to_argv(struct argv_array *argv)
1183{
1184 if (dry_run)
1185 argv_array_push(argv, "--dry-run");
1186 if (prune != -1)
1187 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1188 if (update_head_ok)
1189 argv_array_push(argv, "--update-head-ok");
1190 if (force)
1191 argv_array_push(argv, "--force");
1192 if (keep)
1193 argv_array_push(argv, "--keep");
1194 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1195 argv_array_push(argv, "--recurse-submodules");
1196 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1197 argv_array_push(argv, "--recurse-submodules=on-demand");
1198 if (tags == TAGS_SET)
1199 argv_array_push(argv, "--tags");
1200 else if (tags == TAGS_UNSET)
1201 argv_array_push(argv, "--no-tags");
1202 if (verbosity >= 2)
1203 argv_array_push(argv, "-v");
1204 if (verbosity >= 1)
1205 argv_array_push(argv, "-v");
1206 else if (verbosity < 0)
1207 argv_array_push(argv, "-q");
1208}
1210static int fetch_multiple(struct string_list *list)
1212{
1213 int i, result = 0;
1214 struct argv_array argv = ARGV_ARRAY_INIT;
1215 if (!append && !dry_run) {
1217 int errcode = truncate_fetch_head();
1218 if (errcode)
1219 return errcode;
1220 }
1221 argv_array_pushl(&argv, "fetch", "--append", NULL);
1223 add_options_to_argv(&argv);
1224 for (i = 0; i < list->nr; i++) {
1226 const char *name = list->items[i].string;
1227 argv_array_push(&argv, name);
1228 if (verbosity >= 0)
1229 printf(_("Fetching %s\n"), name);
1230 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1231 error(_("Could not fetch %s"), name);
1232 result = 1;
1233 }
1234 argv_array_pop(&argv);
1235 }
1236 argv_array_clear(&argv);
1238 return result;
1239}
1240static int fetch_one(struct remote *remote, int argc, const char **argv)
1242{
1243 static const char **refs = NULL;
1244 struct refspec *refspec;
1245 int ref_nr = 0;
1246 int exit_code;
1247 if (!remote)
1249 die(_("No remote repository specified. Please, specify either a URL or a\n"
1250 "remote name from which new revisions should be fetched."));
1251 gtransport = prepare_transport(remote, 1);
1253 if (prune < 0) {
1255 /* no command line request */
1256 if (0 <= gtransport->remote->prune)
1257 prune = gtransport->remote->prune;
1258 else if (0 <= fetch_prune_config)
1259 prune = fetch_prune_config;
1260 else
1261 prune = PRUNE_BY_DEFAULT;
1262 }
1263 if (argc > 0) {
1265 int j = 0;
1266 int i;
1267 refs = xcalloc(st_add(argc, 1), sizeof(const char *));
1268 for (i = 0; i < argc; i++) {
1269 if (!strcmp(argv[i], "tag")) {
1270 i++;
1271 if (i >= argc)
1272 die(_("You need to specify a tag name."));
1273 refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
1274 argv[i], argv[i]);
1275 } else
1276 refs[j++] = argv[i];
1277 }
1278 refs[j] = NULL;
1279 ref_nr = j;
1280 }
1281 sigchain_push_common(unlock_pack_on_signal);
1283 atexit(unlock_pack);
1284 refspec = parse_fetch_refspec(ref_nr, refs);
1285 exit_code = do_fetch(gtransport, refspec, ref_nr);
1286 free_refspec(ref_nr, refspec);
1287 transport_disconnect(gtransport);
1288 gtransport = NULL;
1289 return exit_code;
1290}
1291int cmd_fetch(int argc, const char **argv, const char *prefix)
1293{
1294 int i;
1295 struct string_list list = STRING_LIST_INIT_DUP;
1296 struct remote *remote;
1297 int result = 0;
1298 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1299 packet_trace_identity("fetch");
1301 /* Record the command line for the reflog */
1303 strbuf_addstr(&default_rla, "fetch");
1304 for (i = 1; i < argc; i++)
1305 strbuf_addf(&default_rla, " %s", argv[i]);
1306 git_config(git_fetch_config, NULL);
1308 argc = parse_options(argc, argv, prefix,
1310 builtin_fetch_options, builtin_fetch_usage, 0);
1311 if (deepen_relative) {
1313 if (deepen_relative < 0)
1314 die(_("Negative depth in --deepen is not supported"));
1315 if (depth)
1316 die(_("--deepen and --depth are mutually exclusive"));
1317 depth = xstrfmt("%d", deepen_relative);
1318 }
1319 if (unshallow) {
1320 if (depth)
1321 die(_("--depth and --unshallow cannot be used together"));
1322 else if (!is_repository_shallow())
1323 die(_("--unshallow on a complete repository does not make sense"));
1324 else
1325 depth = xstrfmt("%d", INFINITE_DEPTH);
1326 }
1327 /* no need to be strict, transport_set_option() will validate it again */
1329 if (depth && atoi(depth) < 1)
1330 die(_("depth %s is not a positive number"), depth);
1331 if (depth || deepen_since || deepen_not.nr)
1332 deepen = 1;
1333 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1335 if (recurse_submodules_default) {
1336 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
1337 set_config_fetch_recurse_submodules(arg);
1338 }
1339 gitmodules_config();
1340 git_config(submodule_config, NULL);
1341 }
1342 if (all) {
1344 if (argc == 1)
1345 die(_("fetch --all does not take a repository argument"));
1346 else if (argc > 1)
1347 die(_("fetch --all does not make sense with refspecs"));
1348 (void) for_each_remote(get_one_remote_for_fetch, &list);
1349 result = fetch_multiple(&list);
1350 } else if (argc == 0) {
1351 /* No arguments -- use default remote */
1352 remote = remote_get(NULL);
1353 result = fetch_one(remote, argc, argv);
1354 } else if (multiple) {
1355 /* All arguments are assumed to be remotes or groups */
1356 for (i = 0; i < argc; i++)
1357 if (!add_remote_or_group(argv[i], &list))
1358 die(_("No such remote or remote group: %s"), argv[i]);
1359 result = fetch_multiple(&list);
1360 } else {
1361 /* Single remote or group */
1362 (void) add_remote_or_group(argv[0], &list);
1363 if (list.nr > 1) {
1364 /* More than one remote */
1365 if (argc > 1)
1366 die(_("Fetching a group and specifying refspecs does not make sense"));
1367 result = fetch_multiple(&list);
1368 } else {
1369 /* Zero or one remotes */
1370 remote = remote_get(argv[0]);
1371 result = fetch_one(remote, argc-1, argv+1);
1372 }
1373 }
1374 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1376 struct argv_array options = ARGV_ARRAY_INIT;
1377 add_options_to_argv(&options);
1379 result = fetch_populated_submodules(&options,
1380 submodule_prefix,
1381 recurse_submodules,
1382 verbosity < 0,
1383 max_children);
1384 argv_array_clear(&options);
1385 }
1386 string_list_clear(&list, 0);
1388 close_all_packs();
1390 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1392 if (verbosity < 0)
1393 argv_array_push(&argv_gc_auto, "--quiet");
1394 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1395 argv_array_clear(&argv_gc_auto);
1396 return result;
1398}