Merge branch 'cb/maint-orphan-merge-noclobber'
[git/kirr.git] / builtin / fetch.c
blob6bcce55c0cdb6686e0585bf11107559ba61a5700
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"
16 static const char * const builtin_fetch_usage[] = {
17 "git fetch [<options>] [<repository> [<refspec>...]]",
18 "git fetch [<options>] <group>",
19 "git fetch --multiple [<options>] [(<repository> | <group>)...]",
20 "git fetch --all [<options>]",
21 NULL
24 enum {
25 TAGS_UNSET = 0,
26 TAGS_DEFAULT = 1,
27 TAGS_SET = 2
30 static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
31 static int progress;
32 static int tags = TAGS_DEFAULT;
33 static const char *depth;
34 static const char *upload_pack;
35 static struct strbuf default_rla = STRBUF_INIT;
36 static struct transport *transport;
38 static struct option builtin_fetch_options[] = {
39 OPT__VERBOSITY(&verbosity),
40 OPT_BOOLEAN(0, "all", &all,
41 "fetch from all remotes"),
42 OPT_BOOLEAN('a', "append", &append,
43 "append to .git/FETCH_HEAD instead of overwriting"),
44 OPT_STRING(0, "upload-pack", &upload_pack, "PATH",
45 "path to upload pack on remote end"),
46 OPT__FORCE(&force, "force overwrite of local branch"),
47 OPT_BOOLEAN('m', "multiple", &multiple,
48 "fetch from multiple remotes"),
49 OPT_SET_INT('t', "tags", &tags,
50 "fetch all tags and associated objects", TAGS_SET),
51 OPT_SET_INT('n', NULL, &tags,
52 "do not fetch all tags (--no-tags)", TAGS_UNSET),
53 OPT_BOOLEAN('p', "prune", &prune,
54 "prune remote-tracking branches no longer on remote"),
55 OPT_BOOLEAN(0, "dry-run", &dry_run,
56 "dry run"),
57 OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
58 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
59 "allow updating of HEAD ref"),
60 OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
61 OPT_STRING(0, "depth", &depth, "DEPTH",
62 "deepen history of shallow clone"),
63 OPT_END()
66 static void unlock_pack(void)
68 if (transport)
69 transport_unlock_pack(transport);
72 static void unlock_pack_on_signal(int signo)
74 unlock_pack();
75 sigchain_pop(signo);
76 raise(signo);
79 static void add_merge_config(struct ref **head,
80 const struct ref *remote_refs,
81 struct branch *branch,
82 struct ref ***tail)
84 int i;
86 for (i = 0; i < branch->merge_nr; i++) {
87 struct ref *rm, **old_tail = *tail;
88 struct refspec refspec;
90 for (rm = *head; rm; rm = rm->next) {
91 if (branch_merge_matches(branch, i, rm->name)) {
92 rm->merge = 1;
93 break;
96 if (rm)
97 continue;
100 * Not fetched to a remote-tracking branch? We need to fetch
101 * it anyway to allow this branch's "branch.$name.merge"
102 * to be honored by 'git pull', but we do not have to
103 * fail if branch.$name.merge is misconfigured to point
104 * at a nonexisting branch. If we were indeed called by
105 * 'git pull', it will notice the misconfiguration because
106 * there is no entry in the resulting FETCH_HEAD marked
107 * for merging.
109 memset(&refspec, 0, sizeof(refspec));
110 refspec.src = branch->merge[i]->src;
111 get_fetch_map(remote_refs, &refspec, tail, 1);
112 for (rm = *old_tail; rm; rm = rm->next)
113 rm->merge = 1;
117 static void find_non_local_tags(struct transport *transport,
118 struct ref **head,
119 struct ref ***tail);
121 static struct ref *get_ref_map(struct transport *transport,
122 struct refspec *refs, int ref_count, int tags,
123 int *autotags)
125 int i;
126 struct ref *rm;
127 struct ref *ref_map = NULL;
128 struct ref **tail = &ref_map;
130 const struct ref *remote_refs = transport_get_remote_refs(transport);
132 if (ref_count || tags == TAGS_SET) {
133 for (i = 0; i < ref_count; i++) {
134 get_fetch_map(remote_refs, &refs[i], &tail, 0);
135 if (refs[i].dst && refs[i].dst[0])
136 *autotags = 1;
138 /* Merge everything on the command line, but not --tags */
139 for (rm = ref_map; rm; rm = rm->next)
140 rm->merge = 1;
141 if (tags == TAGS_SET)
142 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
143 } else {
144 /* Use the defaults */
145 struct remote *remote = transport->remote;
146 struct branch *branch = branch_get(NULL);
147 int has_merge = branch_has_merge_config(branch);
148 if (remote &&
149 (remote->fetch_refspec_nr ||
150 /* Note: has_merge implies non-NULL branch->remote_name */
151 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
152 for (i = 0; i < remote->fetch_refspec_nr; i++) {
153 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
154 if (remote->fetch[i].dst &&
155 remote->fetch[i].dst[0])
156 *autotags = 1;
157 if (!i && !has_merge && ref_map &&
158 !remote->fetch[0].pattern)
159 ref_map->merge = 1;
162 * if the remote we're fetching from is the same
163 * as given in branch.<name>.remote, we add the
164 * ref given in branch.<name>.merge, too.
166 * Note: has_merge implies non-NULL branch->remote_name
168 if (has_merge &&
169 !strcmp(branch->remote_name, remote->name))
170 add_merge_config(&ref_map, remote_refs, branch, &tail);
171 } else {
172 ref_map = get_remote_ref(remote_refs, "HEAD");
173 if (!ref_map)
174 die("Couldn't find remote ref HEAD");
175 ref_map->merge = 1;
176 tail = &ref_map->next;
179 if (tags == TAGS_DEFAULT && *autotags)
180 find_non_local_tags(transport, &ref_map, &tail);
181 ref_remove_duplicates(ref_map);
183 return ref_map;
186 #define STORE_REF_ERROR_OTHER 1
187 #define STORE_REF_ERROR_DF_CONFLICT 2
189 static int s_update_ref(const char *action,
190 struct ref *ref,
191 int check_old)
193 char msg[1024];
194 char *rla = getenv("GIT_REFLOG_ACTION");
195 static struct ref_lock *lock;
197 if (dry_run)
198 return 0;
199 if (!rla)
200 rla = default_rla.buf;
201 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
202 lock = lock_any_ref_for_update(ref->name,
203 check_old ? ref->old_sha1 : NULL, 0);
204 if (!lock)
205 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
206 STORE_REF_ERROR_OTHER;
207 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
208 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
209 STORE_REF_ERROR_OTHER;
210 return 0;
213 #define REFCOL_WIDTH 10
215 static int update_local_ref(struct ref *ref,
216 const char *remote,
217 char *display)
219 struct commit *current = NULL, *updated;
220 enum object_type type;
221 struct branch *current_branch = branch_get(NULL);
222 const char *pretty_ref = prettify_refname(ref->name);
224 *display = 0;
225 type = sha1_object_info(ref->new_sha1, NULL);
226 if (type < 0)
227 die("object %s not found", sha1_to_hex(ref->new_sha1));
229 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
230 if (verbosity > 0)
231 sprintf(display, "= %-*s %-*s -> %s", TRANSPORT_SUMMARY_WIDTH,
232 "[up to date]", REFCOL_WIDTH, remote,
233 pretty_ref);
234 return 0;
237 if (current_branch &&
238 !strcmp(ref->name, current_branch->name) &&
239 !(update_head_ok || is_bare_repository()) &&
240 !is_null_sha1(ref->old_sha1)) {
242 * If this is the head, and it's not okay to update
243 * the head, and the old value of the head isn't empty...
245 sprintf(display, "! %-*s %-*s -> %s (can't fetch in current branch)",
246 TRANSPORT_SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
247 pretty_ref);
248 return 1;
251 if (!is_null_sha1(ref->old_sha1) &&
252 !prefixcmp(ref->name, "refs/tags/")) {
253 int r;
254 r = s_update_ref("updating tag", ref, 0);
255 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
256 TRANSPORT_SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
257 pretty_ref, r ? " (unable to update local ref)" : "");
258 return r;
261 current = lookup_commit_reference_gently(ref->old_sha1, 1);
262 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
263 if (!current || !updated) {
264 const char *msg;
265 const char *what;
266 int r;
267 if (!strncmp(ref->name, "refs/tags/", 10)) {
268 msg = "storing tag";
269 what = "[new tag]";
271 else {
272 msg = "storing head";
273 what = "[new branch]";
276 r = s_update_ref(msg, ref, 0);
277 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
278 TRANSPORT_SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
279 r ? " (unable to update local ref)" : "");
280 return r;
283 if (in_merge_bases(current, &updated, 1)) {
284 char quickref[83];
285 int r;
286 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
287 strcat(quickref, "..");
288 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
289 r = s_update_ref("fast-forward", ref, 1);
290 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
291 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
292 pretty_ref, r ? " (unable to update local ref)" : "");
293 return r;
294 } else if (force || ref->force) {
295 char quickref[84];
296 int r;
297 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
298 strcat(quickref, "...");
299 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
300 r = s_update_ref("forced-update", ref, 1);
301 sprintf(display, "%c %-*s %-*s -> %s (%s)", r ? '!' : '+',
302 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
303 pretty_ref,
304 r ? "unable to update local ref" : "forced update");
305 return r;
306 } else {
307 sprintf(display, "! %-*s %-*s -> %s (non-fast-forward)",
308 TRANSPORT_SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
309 pretty_ref);
310 return 1;
314 static int store_updated_refs(const char *raw_url, const char *remote_name,
315 struct ref *ref_map)
317 FILE *fp;
318 struct commit *commit;
319 int url_len, i, note_len, shown_url = 0, rc = 0;
320 char note[1024];
321 const char *what, *kind;
322 struct ref *rm;
323 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
325 fp = fopen(filename, "a");
326 if (!fp)
327 return error("cannot open %s: %s\n", filename, strerror(errno));
329 if (raw_url)
330 url = transport_anonymize_url(raw_url);
331 else
332 url = xstrdup("foreign");
333 for (rm = ref_map; rm; rm = rm->next) {
334 struct ref *ref = NULL;
336 if (rm->peer_ref) {
337 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
338 strcpy(ref->name, rm->peer_ref->name);
339 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
340 hashcpy(ref->new_sha1, rm->old_sha1);
341 ref->force = rm->peer_ref->force;
344 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
345 if (!commit)
346 rm->merge = 0;
348 if (!strcmp(rm->name, "HEAD")) {
349 kind = "";
350 what = "";
352 else if (!prefixcmp(rm->name, "refs/heads/")) {
353 kind = "branch";
354 what = rm->name + 11;
356 else if (!prefixcmp(rm->name, "refs/tags/")) {
357 kind = "tag";
358 what = rm->name + 10;
360 else if (!prefixcmp(rm->name, "refs/remotes/")) {
361 kind = "remote-tracking branch";
362 what = rm->name + 13;
364 else {
365 kind = "";
366 what = rm->name;
369 url_len = strlen(url);
370 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
372 url_len = i + 1;
373 if (4 < i && !strncmp(".git", url + i - 3, 4))
374 url_len = i - 3;
376 note_len = 0;
377 if (*what) {
378 if (*kind)
379 note_len += sprintf(note + note_len, "%s ",
380 kind);
381 note_len += sprintf(note + note_len, "'%s' of ", what);
383 note[note_len] = '\0';
384 fprintf(fp, "%s\t%s\t%s",
385 sha1_to_hex(commit ? commit->object.sha1 :
386 rm->old_sha1),
387 rm->merge ? "" : "not-for-merge",
388 note);
389 for (i = 0; i < url_len; ++i)
390 if ('\n' == url[i])
391 fputs("\\n", fp);
392 else
393 fputc(url[i], fp);
394 fputc('\n', fp);
396 if (ref) {
397 rc |= update_local_ref(ref, what, note);
398 free(ref);
399 } else
400 sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
401 TRANSPORT_SUMMARY_WIDTH, *kind ? kind : "branch",
402 REFCOL_WIDTH, *what ? what : "HEAD");
403 if (*note) {
404 if (verbosity >= 0 && !shown_url) {
405 fprintf(stderr, "From %.*s\n",
406 url_len, url);
407 shown_url = 1;
409 if (verbosity >= 0)
410 fprintf(stderr, " %s\n", note);
413 free(url);
414 fclose(fp);
415 if (rc & STORE_REF_ERROR_DF_CONFLICT)
416 error("some local refs could not be updated; try running\n"
417 " 'git remote prune %s' to remove any old, conflicting "
418 "branches", remote_name);
419 return rc;
423 * We would want to bypass the object transfer altogether if
424 * everything we are going to fetch already exists and is connected
425 * locally.
427 * The refs we are going to fetch are in ref_map. If running
429 * $ git rev-list --objects --stdin --not --all
431 * (feeding all the refs in ref_map on its standard input)
432 * does not error out, that means everything reachable from the
433 * refs we are going to fetch exists and is connected to some of
434 * our existing refs.
436 static int quickfetch(struct ref *ref_map)
438 struct child_process revlist;
439 struct ref *ref;
440 int err;
441 const char *argv[] = {"rev-list",
442 "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
445 * If we are deepening a shallow clone we already have these
446 * objects reachable. Running rev-list here will return with
447 * a good (0) exit status and we'll bypass the fetch that we
448 * really need to perform. Claiming failure now will ensure
449 * we perform the network exchange to deepen our history.
451 if (depth)
452 return -1;
454 if (!ref_map)
455 return 0;
457 memset(&revlist, 0, sizeof(revlist));
458 revlist.argv = argv;
459 revlist.git_cmd = 1;
460 revlist.no_stdout = 1;
461 revlist.no_stderr = 1;
462 revlist.in = -1;
464 err = start_command(&revlist);
465 if (err) {
466 error("could not run rev-list");
467 return err;
471 * If rev-list --stdin encounters an unknown commit, it terminates,
472 * which will cause SIGPIPE in the write loop below.
474 sigchain_push(SIGPIPE, SIG_IGN);
476 for (ref = ref_map; ref; ref = ref->next) {
477 if (write_in_full(revlist.in, sha1_to_hex(ref->old_sha1), 40) < 0 ||
478 write_str_in_full(revlist.in, "\n") < 0) {
479 if (errno != EPIPE && errno != EINVAL)
480 error("failed write to rev-list: %s", strerror(errno));
481 err = -1;
482 break;
486 if (close(revlist.in)) {
487 error("failed to close rev-list's stdin: %s", strerror(errno));
488 err = -1;
491 sigchain_pop(SIGPIPE);
493 return finish_command(&revlist) || err;
496 static int fetch_refs(struct transport *transport, struct ref *ref_map)
498 int ret = quickfetch(ref_map);
499 if (ret)
500 ret = transport_fetch_refs(transport, ref_map);
501 if (!ret)
502 ret |= store_updated_refs(transport->url,
503 transport->remote->name,
504 ref_map);
505 transport_unlock_pack(transport);
506 return ret;
509 static int prune_refs(struct transport *transport, struct ref *ref_map)
511 int result = 0;
512 struct ref *ref, *stale_refs = get_stale_heads(transport->remote, ref_map);
513 const char *dangling_msg = dry_run
514 ? " (%s will become dangling)\n"
515 : " (%s has become dangling)\n";
517 for (ref = stale_refs; ref; ref = ref->next) {
518 if (!dry_run)
519 result |= delete_ref(ref->name, NULL, 0);
520 if (verbosity >= 0) {
521 fprintf(stderr, " x %-*s %-*s -> %s\n",
522 TRANSPORT_SUMMARY_WIDTH, "[deleted]",
523 REFCOL_WIDTH, "(none)", prettify_refname(ref->name));
524 warn_dangling_symref(stderr, dangling_msg, ref->name);
527 free_refs(stale_refs);
528 return result;
531 static int add_existing(const char *refname, const unsigned char *sha1,
532 int flag, void *cbdata)
534 struct string_list *list = (struct string_list *)cbdata;
535 struct string_list_item *item = string_list_insert(list, refname);
536 item->util = (void *)sha1;
537 return 0;
540 static int will_fetch(struct ref **head, const unsigned char *sha1)
542 struct ref *rm = *head;
543 while (rm) {
544 if (!hashcmp(rm->old_sha1, sha1))
545 return 1;
546 rm = rm->next;
548 return 0;
551 static void find_non_local_tags(struct transport *transport,
552 struct ref **head,
553 struct ref ***tail)
555 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
556 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
557 const struct ref *ref;
558 struct string_list_item *item = NULL;
560 for_each_ref(add_existing, &existing_refs);
561 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
562 if (prefixcmp(ref->name, "refs/tags"))
563 continue;
566 * The peeled ref always follows the matching base
567 * ref, so if we see a peeled ref that we don't want
568 * to fetch then we can mark the ref entry in the list
569 * as one to ignore by setting util to NULL.
571 if (!suffixcmp(ref->name, "^{}")) {
572 if (item && !has_sha1_file(ref->old_sha1) &&
573 !will_fetch(head, ref->old_sha1) &&
574 !has_sha1_file(item->util) &&
575 !will_fetch(head, item->util))
576 item->util = NULL;
577 item = NULL;
578 continue;
582 * If item is non-NULL here, then we previously saw a
583 * ref not followed by a peeled reference, so we need
584 * to check if it is a lightweight tag that we want to
585 * fetch.
587 if (item && !has_sha1_file(item->util) &&
588 !will_fetch(head, item->util))
589 item->util = NULL;
591 item = NULL;
593 /* skip duplicates and refs that we already have */
594 if (string_list_has_string(&remote_refs, ref->name) ||
595 string_list_has_string(&existing_refs, ref->name))
596 continue;
598 item = string_list_insert(&remote_refs, ref->name);
599 item->util = (void *)ref->old_sha1;
601 string_list_clear(&existing_refs, 0);
604 * We may have a final lightweight tag that needs to be
605 * checked to see if it needs fetching.
607 if (item && !has_sha1_file(item->util) &&
608 !will_fetch(head, item->util))
609 item->util = NULL;
612 * For all the tags in the remote_refs string list,
613 * add them to the list of refs to be fetched
615 for_each_string_list_item(item, &remote_refs) {
616 /* Unless we have already decided to ignore this item... */
617 if (item->util)
619 struct ref *rm = alloc_ref(item->string);
620 rm->peer_ref = alloc_ref(item->string);
621 hashcpy(rm->old_sha1, item->util);
622 **tail = rm;
623 *tail = &rm->next;
627 string_list_clear(&remote_refs, 0);
630 static void check_not_current_branch(struct ref *ref_map)
632 struct branch *current_branch = branch_get(NULL);
634 if (is_bare_repository() || !current_branch)
635 return;
637 for (; ref_map; ref_map = ref_map->next)
638 if (ref_map->peer_ref && !strcmp(current_branch->refname,
639 ref_map->peer_ref->name))
640 die("Refusing to fetch into current branch %s "
641 "of non-bare repository", current_branch->refname);
644 static int truncate_fetch_head(void)
646 char *filename = git_path("FETCH_HEAD");
647 FILE *fp = fopen(filename, "w");
649 if (!fp)
650 return error("cannot open %s: %s\n", filename, strerror(errno));
651 fclose(fp);
652 return 0;
655 static int do_fetch(struct transport *transport,
656 struct refspec *refs, int ref_count)
658 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
659 struct string_list_item *peer_item = NULL;
660 struct ref *ref_map;
661 struct ref *rm;
662 int autotags = (transport->remote->fetch_tags == 1);
664 for_each_ref(add_existing, &existing_refs);
666 if (tags == TAGS_DEFAULT) {
667 if (transport->remote->fetch_tags == 2)
668 tags = TAGS_SET;
669 if (transport->remote->fetch_tags == -1)
670 tags = TAGS_UNSET;
673 if (!transport->get_refs_list || !transport->fetch)
674 die("Don't know how to fetch from %s", transport->url);
676 /* if not appending, truncate FETCH_HEAD */
677 if (!append && !dry_run) {
678 int errcode = truncate_fetch_head();
679 if (errcode)
680 return errcode;
683 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
684 if (!update_head_ok)
685 check_not_current_branch(ref_map);
687 for (rm = ref_map; rm; rm = rm->next) {
688 if (rm->peer_ref) {
689 peer_item = string_list_lookup(&existing_refs,
690 rm->peer_ref->name);
691 if (peer_item)
692 hashcpy(rm->peer_ref->old_sha1,
693 peer_item->util);
697 if (tags == TAGS_DEFAULT && autotags)
698 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
699 if (fetch_refs(transport, ref_map)) {
700 free_refs(ref_map);
701 return 1;
703 if (prune)
704 prune_refs(transport, ref_map);
705 free_refs(ref_map);
707 /* if neither --no-tags nor --tags was specified, do automated tag
708 * following ... */
709 if (tags == TAGS_DEFAULT && autotags) {
710 struct ref **tail = &ref_map;
711 ref_map = NULL;
712 find_non_local_tags(transport, &ref_map, &tail);
713 if (ref_map) {
714 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
715 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
716 fetch_refs(transport, ref_map);
718 free_refs(ref_map);
721 return 0;
724 static void set_option(const char *name, const char *value)
726 int r = transport_set_option(transport, name, value);
727 if (r < 0)
728 die("Option \"%s\" value \"%s\" is not valid for %s",
729 name, value, transport->url);
730 if (r > 0)
731 warning("Option \"%s\" is ignored for %s\n",
732 name, transport->url);
735 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
737 struct string_list *list = priv;
738 if (!remote->skip_default_update)
739 string_list_append(list, remote->name);
740 return 0;
743 struct remote_group_data {
744 const char *name;
745 struct string_list *list;
748 static int get_remote_group(const char *key, const char *value, void *priv)
750 struct remote_group_data *g = priv;
752 if (!prefixcmp(key, "remotes.") &&
753 !strcmp(key + 8, g->name)) {
754 /* split list by white space */
755 int space = strcspn(value, " \t\n");
756 while (*value) {
757 if (space > 1) {
758 string_list_append(g->list,
759 xstrndup(value, space));
761 value += space + (value[space] != '\0');
762 space = strcspn(value, " \t\n");
766 return 0;
769 static int add_remote_or_group(const char *name, struct string_list *list)
771 int prev_nr = list->nr;
772 struct remote_group_data g;
773 g.name = name; g.list = list;
775 git_config(get_remote_group, &g);
776 if (list->nr == prev_nr) {
777 struct remote *remote;
778 if (!remote_is_configured(name))
779 return 0;
780 remote = remote_get(name);
781 string_list_append(list, remote->name);
783 return 1;
786 static int fetch_multiple(struct string_list *list)
788 int i, result = 0;
789 const char *argv[11] = { "fetch", "--append" };
790 int argc = 2;
792 if (dry_run)
793 argv[argc++] = "--dry-run";
794 if (prune)
795 argv[argc++] = "--prune";
796 if (update_head_ok)
797 argv[argc++] = "--update-head-ok";
798 if (force)
799 argv[argc++] = "--force";
800 if (keep)
801 argv[argc++] = "--keep";
802 if (verbosity >= 2)
803 argv[argc++] = "-v";
804 if (verbosity >= 1)
805 argv[argc++] = "-v";
806 else if (verbosity < 0)
807 argv[argc++] = "-q";
809 if (!append && !dry_run) {
810 int errcode = truncate_fetch_head();
811 if (errcode)
812 return errcode;
815 for (i = 0; i < list->nr; i++) {
816 const char *name = list->items[i].string;
817 argv[argc] = name;
818 argv[argc + 1] = NULL;
819 if (verbosity >= 0)
820 printf("Fetching %s\n", name);
821 if (run_command_v_opt(argv, RUN_GIT_CMD)) {
822 error("Could not fetch %s", name);
823 result = 1;
827 return result;
830 static int fetch_one(struct remote *remote, int argc, const char **argv)
832 int i;
833 static const char **refs = NULL;
834 int ref_nr = 0;
835 int exit_code;
837 if (!remote)
838 die("No remote repository specified. Please, specify either a URL or a\n"
839 "remote name from which new revisions should be fetched.");
841 transport = transport_get(remote, NULL);
842 transport_set_verbosity(transport, verbosity, progress);
843 if (upload_pack)
844 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
845 if (keep)
846 set_option(TRANS_OPT_KEEP, "yes");
847 if (depth)
848 set_option(TRANS_OPT_DEPTH, depth);
850 if (argc > 0) {
851 int j = 0;
852 refs = xcalloc(argc + 1, sizeof(const char *));
853 for (i = 0; i < argc; i++) {
854 if (!strcmp(argv[i], "tag")) {
855 char *ref;
856 i++;
857 if (i >= argc)
858 die("You need to specify a tag name.");
859 ref = xmalloc(strlen(argv[i]) * 2 + 22);
860 strcpy(ref, "refs/tags/");
861 strcat(ref, argv[i]);
862 strcat(ref, ":refs/tags/");
863 strcat(ref, argv[i]);
864 refs[j++] = ref;
865 } else
866 refs[j++] = argv[i];
868 refs[j] = NULL;
869 ref_nr = j;
872 sigchain_push_common(unlock_pack_on_signal);
873 atexit(unlock_pack);
874 exit_code = do_fetch(transport,
875 parse_fetch_refspec(ref_nr, refs), ref_nr);
876 transport_disconnect(transport);
877 transport = NULL;
878 return exit_code;
881 int cmd_fetch(int argc, const char **argv, const char *prefix)
883 int i;
884 struct string_list list = STRING_LIST_INIT_NODUP;
885 struct remote *remote;
886 int result = 0;
888 /* Record the command line for the reflog */
889 strbuf_addstr(&default_rla, "fetch");
890 for (i = 1; i < argc; i++)
891 strbuf_addf(&default_rla, " %s", argv[i]);
893 argc = parse_options(argc, argv, prefix,
894 builtin_fetch_options, builtin_fetch_usage, 0);
896 if (all) {
897 if (argc == 1)
898 die("fetch --all does not take a repository argument");
899 else if (argc > 1)
900 die("fetch --all does not make sense with refspecs");
901 (void) for_each_remote(get_one_remote_for_fetch, &list);
902 result = fetch_multiple(&list);
903 } else if (argc == 0) {
904 /* No arguments -- use default remote */
905 remote = remote_get(NULL);
906 result = fetch_one(remote, argc, argv);
907 } else if (multiple) {
908 /* All arguments are assumed to be remotes or groups */
909 for (i = 0; i < argc; i++)
910 if (!add_remote_or_group(argv[i], &list))
911 die("No such remote or remote group: %s", argv[i]);
912 result = fetch_multiple(&list);
913 } else {
914 /* Single remote or group */
915 (void) add_remote_or_group(argv[0], &list);
916 if (list.nr > 1) {
917 /* More than one remote */
918 if (argc > 1)
919 die("Fetching a group and specifying refspecs does not make sense");
920 result = fetch_multiple(&list);
921 } else {
922 /* Zero or one remotes */
923 remote = remote_get(argv[0]);
924 result = fetch_one(remote, argc-1, argv+1);
928 /* All names were strdup()ed or strndup()ed */
929 list.strdup_strings = 1;
930 string_list_clear(&list, 0);
932 return result;