?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'jt/keep-partial-clone-filter-upon-lazy-fetch'
[git/debian.git] / builtin / fetch.c
blob25fa1cf931af674ca5c5b98e11f7526a2c74ae8b
1 /*
2 * "git fetch"
3 */
4 #include "cache.h"
5 #include "config.h"
6 #include "repository.h"
7 #include "refs.h"
8 #include "refspec.h"
9 #include "object-store.h"
10 #include "oidset.h"
11 #include "commit.h"
12 #include "builtin.h"
13 #include "string-list.h"
14 #include "remote.h"
15 #include "transport.h"
16 #include "run-command.h"
17 #include "parse-options.h"
18 #include "sigchain.h"
19 #include "submodule-config.h"
20 #include "submodule.h"
21 #include "connected.h"
22 #include "strvec.h"
23 #include "utf8.h"
24 #include "packfile.h"
25 #include "list-objects-filter-options.h"
26 #include "commit-reach.h"
27 #include "branch.h"
28 #include "promisor-remote.h"
29 #include "commit-graph.h"
30 #include "shallow.h"
31
32 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
33
34 static const char * const builtin_fetch_usage[] = {
35 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
36 N_("git fetch [<options>] <group>"),
37 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
38 N_("git fetch --all [<options>]"),
39 NULL
40 };
41
42 enum {
43 TAGS_UNSET = 0,
44 TAGS_DEFAULT = 1,
45 TAGS_SET = 2
46 };
47
48 static int fetch_prune_config = -1; /* unspecified */
49 static int fetch_show_forced_updates = 1;
50 static uint64_t forced_updates_ms = 0;
51 static int prune = -1; /* unspecified */
52 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
53
54 static int fetch_prune_tags_config = -1; /* unspecified */
55 static int prune_tags = -1; /* unspecified */
56 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
57
58 static int all, append, dry_run, force, keep, multiple, update_head_ok;
59 static int write_fetch_head = 1;
60 static int verbosity, deepen_relative, set_upstream;
61 static int progress = -1;
62 static int enable_auto_gc = 1;
63 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
64 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
65 static int fetch_parallel_config = 1;
66 static enum transport_family family;
67 static const char *depth;
68 static const char *deepen_since;
69 static const char *upload_pack;
70 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
71 static struct strbuf default_rla = STRBUF_INIT;
72 static struct transport *gtransport;
73 static struct transport *gsecondary;
74 static const char *submodule_prefix = "";
75 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
76 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
77 static int shown_url = 0;
78 static struct refspec refmap = REFSPEC_INIT_FETCH;
79 static struct list_objects_filter_options filter_options;
80 static struct string_list server_options = STRING_LIST_INIT_DUP;
81 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
82 static int fetch_write_commit_graph = -1;
83 static int stdin_refspecs = 0;
84
85 static int git_fetch_config(const char *k, const char *v, void *cb)
86 {
87 if (!strcmp(k, "fetch.prune")) {
88 fetch_prune_config = git_config_bool(k, v);
89 return 0;
90 }
91
92 if (!strcmp(k, "fetch.prunetags")) {
93 fetch_prune_tags_config = git_config_bool(k, v);
94 return 0;
95 }
96
97 if (!strcmp(k, "fetch.showforcedupdates")) {
98 fetch_show_forced_updates = git_config_bool(k, v);
99 return 0;
100 }
101
102 if (!strcmp(k, "submodule.recurse")) {
103 int r = git_config_bool(k, v) ?
104 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
105 recurse_submodules = r;
106 }
107
108 if (!strcmp(k, "submodule.fetchjobs")) {
109 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
110 return 0;
111 } else if (!strcmp(k, "fetch.recursesubmodules")) {
112 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
113 return 0;
114 }
115
116 if (!strcmp(k, "fetch.parallel")) {
117 fetch_parallel_config = git_config_int(k, v);
118 if (fetch_parallel_config < 0)
119 die(_("fetch.parallel cannot be negative"));
120 return 0;
121 }
122
123 return git_default_config(k, v, cb);
124 }
125
126 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
127 {
128 BUG_ON_OPT_NEG(unset);
129
130 /*
131 * "git fetch --refmap='' origin foo"
132 * can be used to tell the command not to store anywhere
133 */
134 refspec_append(&refmap, arg);
135
136 return 0;
137 }
138
139 static struct option builtin_fetch_options[] = {
140 OPT__VERBOSITY(&verbosity),
141 OPT_BOOL(0, "all", &all,
142 N_("fetch from all remotes")),
143 OPT_BOOL(0, "set-upstream", &set_upstream,
144 N_("set upstream for git pull/fetch")),
145 OPT_BOOL('a', "append", &append,
146 N_("append to .git/FETCH_HEAD instead of overwriting")),
147 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
148 N_("path to upload pack on remote end")),
149 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
150 OPT_BOOL('m', "multiple", &multiple,
151 N_("fetch from multiple remotes")),
152 OPT_SET_INT('t', "tags", &tags,
153 N_("fetch all tags and associated objects"), TAGS_SET),
154 OPT_SET_INT('n', NULL, &tags,
155 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
156 OPT_INTEGER('j', "jobs", &max_jobs,
157 N_("number of submodules fetched in parallel")),
158 OPT_BOOL('p', "prune", &prune,
159 N_("prune remote-tracking branches no longer on remote")),
160 OPT_BOOL('P', "prune-tags", &prune_tags,
161 N_("prune local tags no longer on remote and clobber changed tags")),
162 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
163 N_("control recursive fetching of submodules"),
164 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
165 OPT_BOOL(0, "dry-run", &dry_run,
166 N_("dry run")),
167 OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
168 N_("write fetched references to the FETCH_HEAD file")),
169 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
170 OPT_BOOL('u', "update-head-ok", &update_head_ok,
171 N_("allow updating of HEAD ref")),
172 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
173 OPT_STRING(0, "depth", &depth, N_("depth"),
174 N_("deepen history of shallow clone")),
175 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
176 N_("deepen history of shallow repository based on time")),
177 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
178 N_("deepen history of shallow clone, excluding rev")),
179 OPT_INTEGER(0, "deepen", &deepen_relative,
180 N_("deepen history of shallow clone")),
181 OPT_SET_INT_F(0, "unshallow", &unshallow,
182 N_("convert to a complete repository"),
183 1, PARSE_OPT_NONEG),
184 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
185 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
186 OPT_CALLBACK_F(0, "recurse-submodules-default",
187 &recurse_submodules_default, N_("on-demand"),
188 N_("default for recursive fetching of submodules "
189 "(lower priority than config files)"),
190 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
191 OPT_BOOL(0, "update-shallow", &update_shallow,
192 N_("accept refs that update .git/shallow")),
193 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
194 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
195 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
196 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
197 TRANSPORT_FAMILY_IPV4),
198 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
199 TRANSPORT_FAMILY_IPV6),
200 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
201 N_("report that we have only objects reachable from this object")),
202 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
203 OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
204 N_("run 'maintenance --auto' after fetching")),
205 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
206 N_("run 'maintenance --auto' after fetching")),
207 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
208 N_("check for forced-updates on all updated branches")),
209 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
210 N_("write the commit-graph after fetching")),
211 OPT_BOOL(0, "stdin", &stdin_refspecs,
212 N_("accept refspecs from stdin")),
213 OPT_END()
214 };
215
216 static void unlock_pack(void)
217 {
218 if (gtransport)
219 transport_unlock_pack(gtransport);
220 if (gsecondary)
221 transport_unlock_pack(gsecondary);
222 }
223
224 static void unlock_pack_on_signal(int signo)
225 {
226 unlock_pack();
227 sigchain_pop(signo);
228 raise(signo);
229 }
230
231 static void add_merge_config(struct ref **head,
232 const struct ref *remote_refs,
233 struct branch *branch,
234 struct ref ***tail)
235 {
236 int i;
237
238 for (i = 0; i < branch->merge_nr; i++) {
239 struct ref *rm, **old_tail = *tail;
240 struct refspec_item refspec;
241
242 for (rm = *head; rm; rm = rm->next) {
243 if (branch_merge_matches(branch, i, rm->name)) {
244 rm->fetch_head_status = FETCH_HEAD_MERGE;
245 break;
246 }
247 }
248 if (rm)
249 continue;
250
251 /*
252 * Not fetched to a remote-tracking branch? We need to fetch
253 * it anyway to allow this branch's "branch.$name.merge"
254 * to be honored by 'git pull', but we do not have to
255 * fail if branch.$name.merge is misconfigured to point
256 * at a nonexisting branch. If we were indeed called by
257 * 'git pull', it will notice the misconfiguration because
258 * there is no entry in the resulting FETCH_HEAD marked
259 * for merging.
260 */
261 memset(&refspec, 0, sizeof(refspec));
262 refspec.src = branch->merge[i]->src;
263 get_fetch_map(remote_refs, &refspec, tail, 1);
264 for (rm = *old_tail; rm; rm = rm->next)
265 rm->fetch_head_status = FETCH_HEAD_MERGE;
266 }
267 }
268
269 static void create_fetch_oidset(struct ref **head, struct oidset *out)
270 {
271 struct ref *rm = *head;
272 while (rm) {
273 oidset_insert(out, &rm->old_oid);
274 rm = rm->next;
275 }
276 }
277
278 struct refname_hash_entry {
279 struct hashmap_entry ent;
280 struct object_id oid;
281 int ignore;
282 char refname[FLEX_ARRAY];
283 };
284
285 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
286 const struct hashmap_entry *eptr,
287 const struct hashmap_entry *entry_or_key,
288 const void *keydata)
289 {
290 const struct refname_hash_entry *e1, *e2;
291
292 e1 = container_of(eptr, const struct refname_hash_entry, ent);
293 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
294 return strcmp(e1->refname, keydata ? keydata : e2->refname);
295 }
296
297 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
298 const char *refname,
299 const struct object_id *oid)
300 {
301 struct refname_hash_entry *ent;
302 size_t len = strlen(refname);
303
304 FLEX_ALLOC_MEM(ent, refname, refname, len);
305 hashmap_entry_init(&ent->ent, strhash(refname));
306 oidcpy(&ent->oid, oid);
307 hashmap_add(map, &ent->ent);
308 return ent;
309 }
310
311 static int add_one_refname(const char *refname,
312 const struct object_id *oid,
313 int flag, void *cbdata)
314 {
315 struct hashmap *refname_map = cbdata;
316
317 (void) refname_hash_add(refname_map, refname, oid);
318 return 0;
319 }
320
321 static void refname_hash_init(struct hashmap *map)
322 {
323 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
324 }
325
326 static int refname_hash_exists(struct hashmap *map, const char *refname)
327 {
328 return !!hashmap_get_from_hash(map, strhash(refname), refname);
329 }
330
331 static void clear_item(struct refname_hash_entry *item)
332 {
333 item->ignore = 1;
334 }
335
336 static void find_non_local_tags(const struct ref *refs,
337 struct ref **head,
338 struct ref ***tail)
339 {
340 struct hashmap existing_refs;
341 struct hashmap remote_refs;
342 struct oidset fetch_oids = OIDSET_INIT;
343 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
344 struct string_list_item *remote_ref_item;
345 const struct ref *ref;
346 struct refname_hash_entry *item = NULL;
347 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
348
349 refname_hash_init(&existing_refs);
350 refname_hash_init(&remote_refs);
351 create_fetch_oidset(head, &fetch_oids);
352
353 for_each_ref(add_one_refname, &existing_refs);
354 for (ref = refs; ref; ref = ref->next) {
355 if (!starts_with(ref->name, "refs/tags/"))
356 continue;
357
358 /*
359 * The peeled ref always follows the matching base
360 * ref, so if we see a peeled ref that we don't want
361 * to fetch then we can mark the ref entry in the list
362 * as one to ignore by setting util to NULL.
363 */
364 if (ends_with(ref->name, "^{}")) {
365 if (item &&
366 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
367 !oidset_contains(&fetch_oids, &ref->old_oid) &&
368 !has_object_file_with_flags(&item->oid, quick_flags) &&
369 !oidset_contains(&fetch_oids, &item->oid))
370 clear_item(item);
371 item = NULL;
372 continue;
373 }
374
375 /*
376 * If item is non-NULL here, then we previously saw a
377 * ref not followed by a peeled reference, so we need
378 * to check if it is a lightweight tag that we want to
379 * fetch.
380 */
381 if (item &&
382 !has_object_file_with_flags(&item->oid, quick_flags) &&
383 !oidset_contains(&fetch_oids, &item->oid))
384 clear_item(item);
385
386 item = NULL;
387
388 /* skip duplicates and refs that we already have */
389 if (refname_hash_exists(&remote_refs, ref->name) ||
390 refname_hash_exists(&existing_refs, ref->name))
391 continue;
392
393 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
394 string_list_insert(&remote_refs_list, ref->name);
395 }
396 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
397
398 /*
399 * We may have a final lightweight tag that needs to be
400 * checked to see if it needs fetching.
401 */
402 if (item &&
403 !has_object_file_with_flags(&item->oid, quick_flags) &&
404 !oidset_contains(&fetch_oids, &item->oid))
405 clear_item(item);
406
407 /*
408 * For all the tags in the remote_refs_list,
409 * add them to the list of refs to be fetched
410 */
411 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
412 const char *refname = remote_ref_item->string;
413 struct ref *rm;
414 unsigned int hash = strhash(refname);
415
416 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
417 struct refname_hash_entry, ent);
418 if (!item)
419 BUG("unseen remote ref?");
420
421 /* Unless we have already decided to ignore this item... */
422 if (item->ignore)
423 continue;
424
425 rm = alloc_ref(item->refname);
426 rm->peer_ref = alloc_ref(item->refname);
427 oidcpy(&rm->old_oid, &item->oid);
428 **tail = rm;
429 *tail = &rm->next;
430 }
431 hashmap_free_entries(&remote_refs, struct refname_hash_entry, ent);
432 string_list_clear(&remote_refs_list, 0);
433 oidset_clear(&fetch_oids);
434 }
435
436 static struct ref *get_ref_map(struct remote *remote,
437 const struct ref *remote_refs,
438 struct refspec *rs,
439 int tags, int *autotags)
440 {
441 int i;
442 struct ref *rm;
443 struct ref *ref_map = NULL;
444 struct ref **tail = &ref_map;
445
446 /* opportunistically-updated references: */
447 struct ref *orefs = NULL, **oref_tail = &orefs;
448
449 struct hashmap existing_refs;
450 int existing_refs_populated = 0;
451
452 if (rs->nr) {
453 struct refspec *fetch_refspec;
454
455 for (i = 0; i < rs->nr; i++) {
456 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
457 if (rs->items[i].dst && rs->items[i].dst[0])
458 *autotags = 1;
459 }
460 /* Merge everything on the command line (but not --tags) */
461 for (rm = ref_map; rm; rm = rm->next)
462 rm->fetch_head_status = FETCH_HEAD_MERGE;
463
464 /*
465 * For any refs that we happen to be fetching via
466 * command-line arguments, the destination ref might
467 * have been missing or have been different than the
468 * remote-tracking ref that would be derived from the
469 * configured refspec. In these cases, we want to
470 * take the opportunity to update their configured
471 * remote-tracking reference. However, we do not want
472 * to mention these entries in FETCH_HEAD at all, as
473 * they would simply be duplicates of existing
474 * entries, so we set them FETCH_HEAD_IGNORE below.
475 *
476 * We compute these entries now, based only on the
477 * refspecs specified on the command line. But we add
478 * them to the list following the refspecs resulting
479 * from the tags option so that one of the latter,
480 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
481 * by ref_remove_duplicates() in favor of one of these
482 * opportunistic entries with FETCH_HEAD_IGNORE.
483 */
484 if (refmap.nr)
485 fetch_refspec = &refmap;
486 else
487 fetch_refspec = &remote->fetch;
488
489 for (i = 0; i < fetch_refspec->nr; i++)
490 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
491 } else if (refmap.nr) {
492 die("--refmap option is only meaningful with command-line refspec(s).");
493 } else {
494 /* Use the defaults */
495 struct branch *branch = branch_get(NULL);
496 int has_merge = branch_has_merge_config(branch);
497 if (remote &&
498 (remote->fetch.nr ||
499 /* Note: has_merge implies non-NULL branch->remote_name */
500 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
501 for (i = 0; i < remote->fetch.nr; i++) {
502 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
503 if (remote->fetch.items[i].dst &&
504 remote->fetch.items[i].dst[0])
505 *autotags = 1;
506 if (!i && !has_merge && ref_map &&
507 !remote->fetch.items[0].pattern)
508 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
509 }
510 /*
511 * if the remote we're fetching from is the same
512 * as given in branch.<name>.remote, we add the
513 * ref given in branch.<name>.merge, too.
514 *
515 * Note: has_merge implies non-NULL branch->remote_name
516 */
517 if (has_merge &&
518 !strcmp(branch->remote_name, remote->name))
519 add_merge_config(&ref_map, remote_refs, branch, &tail);
520 } else {
521 ref_map = get_remote_ref(remote_refs, "HEAD");
522 if (!ref_map)
523 die(_("Couldn't find remote ref HEAD"));
524 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
525 tail = &ref_map->next;
526 }
527 }
528
529 if (tags == TAGS_SET)
530 /* also fetch all tags */
531 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
532 else if (tags == TAGS_DEFAULT && *autotags)
533 find_non_local_tags(remote_refs, &ref_map, &tail);
534
535 /* Now append any refs to be updated opportunistically: */
536 *tail = orefs;
537 for (rm = orefs; rm; rm = rm->next) {
538 rm->fetch_head_status = FETCH_HEAD_IGNORE;
539 tail = &rm->next;
540 }
541
542 ref_map = ref_remove_duplicates(ref_map);
543
544 for (rm = ref_map; rm; rm = rm->next) {
545 if (rm->peer_ref) {
546 const char *refname = rm->peer_ref->name;
547 struct refname_hash_entry *peer_item;
548 unsigned int hash = strhash(refname);
549
550 if (!existing_refs_populated) {
551 refname_hash_init(&existing_refs);
552 for_each_ref(add_one_refname, &existing_refs);
553 existing_refs_populated = 1;
554 }
555
556 peer_item = hashmap_get_entry_from_hash(&existing_refs,
557 hash, refname,
558 struct refname_hash_entry, ent);
559 if (peer_item) {
560 struct object_id *old_oid = &peer_item->oid;
561 oidcpy(&rm->peer_ref->old_oid, old_oid);
562 }
563 }
564 }
565 if (existing_refs_populated)
566 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
567
568 return ref_map;
569 }
570
571 #define STORE_REF_ERROR_OTHER 1
572 #define STORE_REF_ERROR_DF_CONFLICT 2
573
574 static int s_update_ref(const char *action,
575 struct ref *ref,
576 int check_old)
577 {
578 char *msg;
579 char *rla = getenv("GIT_REFLOG_ACTION");
580 struct ref_transaction *transaction;
581 struct strbuf err = STRBUF_INIT;
582 int ret, df_conflict = 0;
583
584 if (dry_run)
585 return 0;
586 if (!rla)
587 rla = default_rla.buf;
588 msg = xstrfmt("%s: %s", rla, action);
589
590 transaction = ref_transaction_begin(&err);
591 if (!transaction ||
592 ref_transaction_update(transaction, ref->name,
593 &ref->new_oid,
594 check_old ? &ref->old_oid : NULL,
595 0, msg, &err))
596 goto fail;
597
598 ret = ref_transaction_commit(transaction, &err);
599 if (ret) {
600 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
601 goto fail;
602 }
603
604 ref_transaction_free(transaction);
605 strbuf_release(&err);
606 free(msg);
607 return 0;
608 fail:
609 ref_transaction_free(transaction);
610 error("%s", err.buf);
611 strbuf_release(&err);
612 free(msg);
613 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
614 : STORE_REF_ERROR_OTHER;
615 }
616
617 static int refcol_width = 10;
618 static int compact_format;
619
620 static void adjust_refcol_width(const struct ref *ref)
621 {
622 int max, rlen, llen, len;
623
624 /* uptodate lines are only shown on high verbosity level */
625 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
626 return;
627
628 max = term_columns();
629 rlen = utf8_strwidth(prettify_refname(ref->name));
630
631 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
632
633 /*
634 * rough estimation to see if the output line is too long and
635 * should not be counted (we can't do precise calculation
636 * anyway because we don't know if the error explanation part
637 * will be printed in update_local_ref)
638 */
639 if (compact_format) {
640 llen = 0;
641 max = max * 2 / 3;
642 }
643 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
644 if (len >= max)
645 return;
646
647 /*
648 * Not precise calculation for compact mode because '*' can
649 * appear on the left hand side of '->' and shrink the column
650 * back.
651 */
652 if (refcol_width < rlen)
653 refcol_width = rlen;
654 }
655
656 static void prepare_format_display(struct ref *ref_map)
657 {
658 struct ref *rm;
659 const char *format = "full";
660
661 git_config_get_string_tmp("fetch.output", &format);
662 if (!strcasecmp(format, "full"))
663 compact_format = 0;
664 else if (!strcasecmp(format, "compact"))
665 compact_format = 1;
666 else
667 die(_("configuration fetch.output contains invalid value %s"),
668 format);
669
670 for (rm = ref_map; rm; rm = rm->next) {
671 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
672 !rm->peer_ref ||
673 !strcmp(rm->name, "HEAD"))
674 continue;
675
676 adjust_refcol_width(rm);
677 }
678 }
679
680 static void print_remote_to_local(struct strbuf *display,
681 const char *remote, const char *local)
682 {
683 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
684 }
685
686 static int find_and_replace(struct strbuf *haystack,
687 const char *needle,
688 const char *placeholder)
689 {
690 const char *p = NULL;
691 int plen, nlen;
692
693 nlen = strlen(needle);
694 if (ends_with(haystack->buf, needle))
695 p = haystack->buf + haystack->len - nlen;
696 else
697 p = strstr(haystack->buf, needle);
698 if (!p)
699 return 0;
700
701 if (p > haystack->buf && p[-1] != '/')
702 return 0;
703
704 plen = strlen(p);
705 if (plen > nlen && p[nlen] != '/')
706 return 0;
707
708 strbuf_splice(haystack, p - haystack->buf, nlen,
709 placeholder, strlen(placeholder));
710 return 1;
711 }
712
713 static void print_compact(struct strbuf *display,
714 const char *remote, const char *local)
715 {
716 struct strbuf r = STRBUF_INIT;
717 struct strbuf l = STRBUF_INIT;
718
719 if (!strcmp(remote, local)) {
720 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
721 return;
722 }
723
724 strbuf_addstr(&r, remote);
725 strbuf_addstr(&l, local);
726
727 if (!find_and_replace(&r, local, "*"))
728 find_and_replace(&l, remote, "*");
729 print_remote_to_local(display, r.buf, l.buf);
730
731 strbuf_release(&r);
732 strbuf_release(&l);
733 }
734
735 static void format_display(struct strbuf *display, char code,
736 const char *summary, const char *error,
737 const char *remote, const char *local,
738 int summary_width)
739 {
740 int width = (summary_width + strlen(summary) - gettext_width(summary));
741
742 strbuf_addf(display, "%c %-*s ", code, width, summary);
743 if (!compact_format)
744 print_remote_to_local(display, remote, local);
745 else
746 print_compact(display, remote, local);
747 if (error)
748 strbuf_addf(display, " (%s)", error);
749 }
750
751 static int update_local_ref(struct ref *ref,
752 const char *remote,
753 const struct ref *remote_ref,
754 struct strbuf *display,
755 int summary_width)
756 {
757 struct commit *current = NULL, *updated;
758 enum object_type type;
759 struct branch *current_branch = branch_get(NULL);
760 const char *pretty_ref = prettify_refname(ref->name);
761 int fast_forward = 0;
762
763 type = oid_object_info(the_repository, &ref->new_oid, NULL);
764 if (type < 0)
765 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
766
767 if (oideq(&ref->old_oid, &ref->new_oid)) {
768 if (verbosity > 0)
769 format_display(display, '=', _("[up to date]"), NULL,
770 remote, pretty_ref, summary_width);
771 return 0;
772 }
773
774 if (current_branch &&
775 !strcmp(ref->name, current_branch->name) &&
776 !(update_head_ok || is_bare_repository()) &&
777 !is_null_oid(&ref->old_oid)) {
778 /*
779 * If this is the head, and it's not okay to update
780 * the head, and the old value of the head isn't empty...
781 */
782 format_display(display, '!', _("[rejected]"),
783 _("can't fetch in current branch"),
784 remote, pretty_ref, summary_width);
785 return 1;
786 }
787
788 if (!is_null_oid(&ref->old_oid) &&
789 starts_with(ref->name, "refs/tags/")) {
790 if (force || ref->force) {
791 int r;
792 r = s_update_ref("updating tag", ref, 0);
793 format_display(display, r ? '!' : 't', _("[tag update]"),
794 r ? _("unable to update local ref") : NULL,
795 remote, pretty_ref, summary_width);
796 return r;
797 } else {
798 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
799 remote, pretty_ref, summary_width);
800 return 1;
801 }
802 }
803
804 current = lookup_commit_reference_gently(the_repository,
805 &ref->old_oid, 1);
806 updated = lookup_commit_reference_gently(the_repository,
807 &ref->new_oid, 1);
808 if (!current || !updated) {
809 const char *msg;
810 const char *what;
811 int r;
812 /*
813 * Nicely describe the new ref we're fetching.
814 * Base this on the remote's ref name, as it's
815 * more likely to follow a standard layout.
816 */
817 const char *name = remote_ref ? remote_ref->name : "";
818 if (starts_with(name, "refs/tags/")) {
819 msg = "storing tag";
820 what = _("[new tag]");
821 } else if (starts_with(name, "refs/heads/")) {
822 msg = "storing head";
823 what = _("[new branch]");
824 } else {
825 msg = "storing ref";
826 what = _("[new ref]");
827 }
828
829 r = s_update_ref(msg, ref, 0);
830 format_display(display, r ? '!' : '*', what,
831 r ? _("unable to update local ref") : NULL,
832 remote, pretty_ref, summary_width);
833 return r;
834 }
835
836 if (fetch_show_forced_updates) {
837 uint64_t t_before = getnanotime();
838 fast_forward = in_merge_bases(current, updated);
839 forced_updates_ms += (getnanotime() - t_before) / 1000000;
840 } else {
841 fast_forward = 1;
842 }
843
844 if (fast_forward) {
845 struct strbuf quickref = STRBUF_INIT;
846 int r;
847
848 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
849 strbuf_addstr(&quickref, "..");
850 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
851 r = s_update_ref("fast-forward", ref, 1);
852 format_display(display, r ? '!' : ' ', quickref.buf,
853 r ? _("unable to update local ref") : NULL,
854 remote, pretty_ref, summary_width);
855 strbuf_release(&quickref);
856 return r;
857 } else if (force || ref->force) {
858 struct strbuf quickref = STRBUF_INIT;
859 int r;
860 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
861 strbuf_addstr(&quickref, "...");
862 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
863 r = s_update_ref("forced-update", ref, 1);
864 format_display(display, r ? '!' : '+', quickref.buf,
865 r ? _("unable to update local ref") : _("forced update"),
866 remote, pretty_ref, summary_width);
867 strbuf_release(&quickref);
868 return r;
869 } else {
870 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
871 remote, pretty_ref, summary_width);
872 return 1;
873 }
874 }
875
876 static int iterate_ref_map(void *cb_data, struct object_id *oid)
877 {
878 struct ref **rm = cb_data;
879 struct ref *ref = *rm;
880
881 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
882 ref = ref->next;
883 if (!ref)
884 return -1; /* end of the list */
885 *rm = ref->next;
886 oidcpy(oid, &ref->old_oid);
887 return 0;
888 }
889
890 static const char warn_show_forced_updates[] =
891 N_("Fetch normally indicates which branches had a forced update,\n"
892 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
893 "flag or run 'git config fetch.showForcedUpdates true'.");
894 static const char warn_time_show_forced_updates[] =
895 N_("It took %.2f seconds to check forced updates. You can use\n"
896 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
897 " to avoid this check.\n");
898
899 static int store_updated_refs(const char *raw_url, const char *remote_name,
900 int connectivity_checked, struct ref *ref_map)
901 {
902 FILE *fp;
903 struct commit *commit;
904 int url_len, i, rc = 0;
905 struct strbuf note = STRBUF_INIT;
906 const char *what, *kind;
907 struct ref *rm;
908 char *url;
909 const char *filename = (!write_fetch_head
910 ? "/dev/null"
911 : git_path_fetch_head(the_repository));
912 int want_status;
913 int summary_width = transport_summary_width(ref_map);
914
915 fp = fopen(filename, "a");
916 if (!fp)
917 return error_errno(_("cannot open %s"), filename);
918
919 if (raw_url)
920 url = transport_anonymize_url(raw_url);
921 else
922 url = xstrdup("foreign");
923
924 if (!connectivity_checked) {
925 struct check_connected_options opt = CHECK_CONNECTED_INIT;
926
927 rm = ref_map;
928 if (check_connected(iterate_ref_map, &rm, &opt)) {
929 rc = error(_("%s did not send all necessary objects\n"), url);
930 goto abort;
931 }
932 }
933
934 prepare_format_display(ref_map);
935
936 /*
937 * We do a pass for each fetch_head_status type in their enum order, so
938 * merged entries are written before not-for-merge. That lets readers
939 * use FETCH_HEAD as a refname to refer to the ref to be merged.
940 */
941 for (want_status = FETCH_HEAD_MERGE;
942 want_status <= FETCH_HEAD_IGNORE;
943 want_status++) {
944 for (rm = ref_map; rm; rm = rm->next) {
945 struct ref *ref = NULL;
946 const char *merge_status_marker = "";
947
948 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
949 if (want_status == FETCH_HEAD_MERGE)
950 warning(_("reject %s because shallow roots are not allowed to be updated"),
951 rm->peer_ref ? rm->peer_ref->name : rm->name);
952 continue;
953 }
954
955 commit = lookup_commit_reference_gently(the_repository,
956 &rm->old_oid,
957 1);
958 if (!commit)
959 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
960
961 if (rm->fetch_head_status != want_status)
962 continue;
963
964 if (rm->peer_ref) {
965 ref = alloc_ref(rm->peer_ref->name);
966 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
967 oidcpy(&ref->new_oid, &rm->old_oid);
968 ref->force = rm->peer_ref->force;
969 }
970
971 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
972 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
973 check_for_new_submodule_commits(&rm->old_oid);
974 }
975
976 if (!strcmp(rm->name, "HEAD")) {
977 kind = "";
978 what = "";
979 }
980 else if (skip_prefix(rm->name, "refs/heads/", &what))
981 kind = "branch";
982 else if (skip_prefix(rm->name, "refs/tags/", &what))
983 kind = "tag";
984 else if (skip_prefix(rm->name, "refs/remotes/", &what))
985 kind = "remote-tracking branch";
986 else {
987 kind = "";
988 what = rm->name;
989 }
990
991 url_len = strlen(url);
992 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
993 ;
994 url_len = i + 1;
995 if (4 < i && !strncmp(".git", url + i - 3, 4))
996 url_len = i - 3;
997
998 strbuf_reset(&note);
999 if (*what) {
1000 if (*kind)
1001 strbuf_addf(&note, "%s ", kind);
1002 strbuf_addf(&note, "'%s' of ", what);
1003 }
1004 switch (rm->fetch_head_status) {
1005 case FETCH_HEAD_NOT_FOR_MERGE:
1006 merge_status_marker = "not-for-merge";
1007 /* fall-through */
1008 case FETCH_HEAD_MERGE:
1009 fprintf(fp, "%s\t%s\t%s",
1010 oid_to_hex(&rm->old_oid),
1011 merge_status_marker,
1012 note.buf);
1013 for (i = 0; i < url_len; ++i)
1014 if ('\n' == url[i])
1015 fputs("\\n", fp);
1016 else
1017 fputc(url[i], fp);
1018 fputc('\n', fp);
1019 break;
1020 default:
1021 /* do not write anything to FETCH_HEAD */
1022 break;
1023 }
1024
1025 strbuf_reset(&note);
1026 if (ref) {
1027 rc |= update_local_ref(ref, what, rm, &note,
1028 summary_width);
1029 free(ref);
1030 } else if (write_fetch_head || dry_run) {
1031 /*
1032 * Display fetches written to FETCH_HEAD (or
1033 * would be written to FETCH_HEAD, if --dry-run
1034 * is set).
1035 */
1036 format_display(&note, '*',
1037 *kind ? kind : "branch", NULL,
1038 *what ? what : "HEAD",
1039 "FETCH_HEAD", summary_width);
1040 }
1041 if (note.len) {
1042 if (verbosity >= 0 && !shown_url) {
1043 fprintf(stderr, _("From %.*s\n"),
1044 url_len, url);
1045 shown_url = 1;
1046 }
1047 if (verbosity >= 0)
1048 fprintf(stderr, " %s\n", note.buf);
1049 }
1050 }
1051 }
1052
1053 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1054 error(_("some local refs could not be updated; try running\n"
1055 " 'git remote prune %s' to remove any old, conflicting "
1056 "branches"), remote_name);
1057
1058 if (advice_fetch_show_forced_updates) {
1059 if (!fetch_show_forced_updates) {
1060 warning(_(warn_show_forced_updates));
1061 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1062 warning(_(warn_time_show_forced_updates),
1063 forced_updates_ms / 1000.0);
1064 }
1065 }
1066
1067 abort:
1068 strbuf_release(&note);
1069 free(url);
1070 fclose(fp);
1071 return rc;
1072 }
1073
1074 /*
1075 * We would want to bypass the object transfer altogether if
1076 * everything we are going to fetch already exists and is connected
1077 * locally.
1078 */
1079 static int check_exist_and_connected(struct ref *ref_map)
1080 {
1081 struct ref *rm = ref_map;
1082 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1083 struct ref *r;
1084
1085 /*
1086 * If we are deepening a shallow clone we already have these
1087 * objects reachable. Running rev-list here will return with
1088 * a good (0) exit status and we'll bypass the fetch that we
1089 * really need to perform. Claiming failure now will ensure
1090 * we perform the network exchange to deepen our history.
1091 */
1092 if (deepen)
1093 return -1;
1094
1095 /*
1096 * check_connected() allows objects to merely be promised, but
1097 * we need all direct targets to exist.
1098 */
1099 for (r = rm; r; r = r->next) {
1100 if (!has_object_file_with_flags(&r->old_oid,
1101 OBJECT_INFO_SKIP_FETCH_OBJECT))
1102 return -1;
1103 }
1104
1105 opt.quiet = 1;
1106 return check_connected(iterate_ref_map, &rm, &opt);
1107 }
1108
1109 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1110 {
1111 int ret = check_exist_and_connected(ref_map);
1112 if (ret) {
1113 trace2_region_enter("fetch", "fetch_refs", the_repository);
1114 ret = transport_fetch_refs(transport, ref_map);
1115 trace2_region_leave("fetch", "fetch_refs", the_repository);
1116 }
1117 if (!ret)
1118 /*
1119 * Keep the new pack's ".keep" file around to allow the caller
1120 * time to update refs to reference the new objects.
1121 */
1122 return 0;
1123 transport_unlock_pack(transport);
1124 return ret;
1125 }
1126
1127 /* Update local refs based on the ref values fetched from a remote */
1128 static int consume_refs(struct transport *transport, struct ref *ref_map)
1129 {
1130 int connectivity_checked = transport->smart_options
1131 ? transport->smart_options->connectivity_checked : 0;
1132 int ret;
1133 trace2_region_enter("fetch", "consume_refs", the_repository);
1134 ret = store_updated_refs(transport->url,
1135 transport->remote->name,
1136 connectivity_checked,
1137 ref_map);
1138 transport_unlock_pack(transport);
1139 trace2_region_leave("fetch", "consume_refs", the_repository);
1140 return ret;
1141 }
1142
1143 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1144 const char *raw_url)
1145 {
1146 int url_len, i, result = 0;
1147 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1148 char *url;
1149 int summary_width = transport_summary_width(stale_refs);
1150 const char *dangling_msg = dry_run
1151 ? _(" (%s will become dangling)")
1152 : _(" (%s has become dangling)");
1153
1154 if (raw_url)
1155 url = transport_anonymize_url(raw_url);
1156 else
1157 url = xstrdup("foreign");
1158
1159 url_len = strlen(url);
1160 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1161 ;
1162
1163 url_len = i + 1;
1164 if (4 < i && !strncmp(".git", url + i - 3, 4))
1165 url_len = i - 3;
1166
1167 if (!dry_run) {
1168 struct string_list refnames = STRING_LIST_INIT_NODUP;
1169
1170 for (ref = stale_refs; ref; ref = ref->next)
1171 string_list_append(&refnames, ref->name);
1172
1173 result = delete_refs("fetch: prune", &refnames, 0);
1174 string_list_clear(&refnames, 0);
1175 }
1176
1177 if (verbosity >= 0) {
1178 for (ref = stale_refs; ref; ref = ref->next) {
1179 struct strbuf sb = STRBUF_INIT;
1180 if (!shown_url) {
1181 fprintf(stderr, _("From %.*s\n"), url_len, url);
1182 shown_url = 1;
1183 }
1184 format_display(&sb, '-', _("[deleted]"), NULL,
1185 _("(none)"), prettify_refname(ref->name),
1186 summary_width);
1187 fprintf(stderr, " %s\n",sb.buf);
1188 strbuf_release(&sb);
1189 warn_dangling_symref(stderr, dangling_msg, ref->name);
1190 }
1191 }
1192
1193 free(url);
1194 free_refs(stale_refs);
1195 return result;
1196 }
1197
1198 static void check_not_current_branch(struct ref *ref_map)
1199 {
1200 struct branch *current_branch = branch_get(NULL);
1201
1202 if (is_bare_repository() || !current_branch)
1203 return;
1204
1205 for (; ref_map; ref_map = ref_map->next)
1206 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1207 ref_map->peer_ref->name))
1208 die(_("Refusing to fetch into current branch %s "
1209 "of non-bare repository"), current_branch->refname);
1210 }
1211
1212 static int truncate_fetch_head(void)
1213 {
1214 const char *filename = git_path_fetch_head(the_repository);
1215 FILE *fp = fopen_for_writing(filename);
1216
1217 if (!fp)
1218 return error_errno(_("cannot open %s"), filename);
1219 fclose(fp);
1220 return 0;
1221 }
1222
1223 static void set_option(struct transport *transport, const char *name, const char *value)
1224 {
1225 int r = transport_set_option(transport, name, value);
1226 if (r < 0)
1227 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1228 name, value, transport->url);
1229 if (r > 0)
1230 warning(_("Option \"%s\" is ignored for %s\n"),
1231 name, transport->url);
1232 }
1233
1234
1235 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1236 void *cb_data)
1237 {
1238 struct oid_array *oids = cb_data;
1239
1240 oid_array_append(oids, oid);
1241 return 0;
1242 }
1243
1244 static void add_negotiation_tips(struct git_transport_options *smart_options)
1245 {
1246 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1247 int i;
1248
1249 for (i = 0; i < negotiation_tip.nr; i++) {
1250 const char *s = negotiation_tip.items[i].string;
1251 int old_nr;
1252 if (!has_glob_specials(s)) {
1253 struct object_id oid;
1254 if (get_oid(s, &oid))
1255 die("%s is not a valid object", s);
1256 oid_array_append(oids, &oid);
1257 continue;
1258 }
1259 old_nr = oids->nr;
1260 for_each_glob_ref(add_oid, s, oids);
1261 if (old_nr == oids->nr)
1262 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1263 s);
1264 }
1265 smart_options->negotiation_tips = oids;
1266 }
1267
1268 static struct transport *prepare_transport(struct remote *remote, int deepen)
1269 {
1270 struct transport *transport;
1271
1272 transport = transport_get(remote, NULL);
1273 transport_set_verbosity(transport, verbosity, progress);
1274 transport->family = family;
1275 if (upload_pack)
1276 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1277 if (keep)
1278 set_option(transport, TRANS_OPT_KEEP, "yes");
1279 if (depth)
1280 set_option(transport, TRANS_OPT_DEPTH, depth);
1281 if (deepen && deepen_since)
1282 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1283 if (deepen && deepen_not.nr)
1284 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1285 (const char *)&deepen_not);
1286 if (deepen_relative)
1287 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1288 if (update_shallow)
1289 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1290 if (filter_options.choice) {
1291 const char *spec =
1292 expand_list_objects_filter_spec(&filter_options);
1293 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1294 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1295 }
1296 if (negotiation_tip.nr) {
1297 if (transport->smart_options)
1298 add_negotiation_tips(transport->smart_options);
1299 else
1300 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1301 }
1302 return transport;
1303 }
1304
1305 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1306 {
1307 int cannot_reuse;
1308
1309 /*
1310 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1311 * when remote helper is used (setting it to an empty string
1312 * is not unsetting). We could extend the remote helper
1313 * protocol for that, but for now, just force a new connection
1314 * without deepen-since. Similar story for deepen-not.
1315 */
1316 cannot_reuse = transport->cannot_reuse ||
1317 deepen_since || deepen_not.nr;
1318 if (cannot_reuse) {
1319 gsecondary = prepare_transport(transport->remote, 0);
1320 transport = gsecondary;
1321 }
1322
1323 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1324 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1325 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1326 if (!fetch_refs(transport, ref_map))
1327 consume_refs(transport, ref_map);
1328
1329 if (gsecondary) {
1330 transport_disconnect(gsecondary);
1331 gsecondary = NULL;
1332 }
1333 }
1334
1335 static int do_fetch(struct transport *transport,
1336 struct refspec *rs)
1337 {
1338 struct ref *ref_map;
1339 int autotags = (transport->remote->fetch_tags == 1);
1340 int retcode = 0;
1341 const struct ref *remote_refs;
1342 struct strvec ref_prefixes = STRVEC_INIT;
1343 int must_list_refs = 1;
1344
1345 if (tags == TAGS_DEFAULT) {
1346 if (transport->remote->fetch_tags == 2)
1347 tags = TAGS_SET;
1348 if (transport->remote->fetch_tags == -1)
1349 tags = TAGS_UNSET;
1350 }
1351
1352 /* if not appending, truncate FETCH_HEAD */
1353 if (!append && write_fetch_head) {
1354 retcode = truncate_fetch_head();
1355 if (retcode)
1356 goto cleanup;
1357 }
1358
1359 if (rs->nr) {
1360 int i;
1361
1362 refspec_ref_prefixes(rs, &ref_prefixes);
1363
1364 /*
1365 * We can avoid listing refs if all of them are exact
1366 * OIDs
1367 */
1368 must_list_refs = 0;
1369 for (i = 0; i < rs->nr; i++) {
1370 if (!rs->items[i].exact_sha1) {
1371 must_list_refs = 1;
1372 break;
1373 }
1374 }
1375 } else if (transport->remote && transport->remote->fetch.nr)
1376 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1377
1378 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1379 must_list_refs = 1;
1380 if (ref_prefixes.nr)
1381 strvec_push(&ref_prefixes, "refs/tags/");
1382 }
1383
1384 if (must_list_refs) {
1385 trace2_region_enter("fetch", "remote_refs", the_repository);
1386 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1387 trace2_region_leave("fetch", "remote_refs", the_repository);
1388 } else
1389 remote_refs = NULL;
1390
1391 strvec_clear(&ref_prefixes);
1392
1393 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1394 tags, &autotags);
1395 if (!update_head_ok)
1396 check_not_current_branch(ref_map);
1397
1398 if (tags == TAGS_DEFAULT && autotags)
1399 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1400 if (prune) {
1401 /*
1402 * We only prune based on refspecs specified
1403 * explicitly (via command line or configuration); we
1404 * don't care whether --tags was specified.
1405 */
1406 if (rs->nr) {
1407 prune_refs(rs, ref_map, transport->url);
1408 } else {
1409 prune_refs(&transport->remote->fetch,
1410 ref_map,
1411 transport->url);
1412 }
1413 }
1414 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1415 free_refs(ref_map);
1416 retcode = 1;
1417 goto cleanup;
1418 }
1419
1420 if (set_upstream) {
1421 struct branch *branch = branch_get("HEAD");
1422 struct ref *rm;
1423 struct ref *source_ref = NULL;
1424
1425 /*
1426 * We're setting the upstream configuration for the
1427 * current branch. The relevant upstream is the
1428 * fetched branch that is meant to be merged with the
1429 * current one, i.e. the one fetched to FETCH_HEAD.
1430 *
1431 * When there are several such branches, consider the
1432 * request ambiguous and err on the safe side by doing
1433 * nothing and just emit a warning.
1434 */
1435 for (rm = ref_map; rm; rm = rm->next) {
1436 if (!rm->peer_ref) {
1437 if (source_ref) {
1438 warning(_("multiple branches detected, incompatible with --set-upstream"));
1439 goto skip;
1440 } else {
1441 source_ref = rm;
1442 }
1443 }
1444 }
1445 if (source_ref) {
1446 if (!strcmp(source_ref->name, "HEAD") ||
1447 starts_with(source_ref->name, "refs/heads/"))
1448 install_branch_config(0,
1449 branch->name,
1450 transport->remote->name,
1451 source_ref->name);
1452 else if (starts_with(source_ref->name, "refs/remotes/"))
1453 warning(_("not setting upstream for a remote remote-tracking branch"));
1454 else if (starts_with(source_ref->name, "refs/tags/"))
1455 warning(_("not setting upstream for a remote tag"));
1456 else
1457 warning(_("unknown branch type"));
1458 } else {
1459 warning(_("no source branch found.\n"
1460 "you need to specify exactly one branch with the --set-upstream option."));
1461 }
1462 }
1463 skip:
1464 free_refs(ref_map);
1465
1466 /* if neither --no-tags nor --tags was specified, do automated tag
1467 * following ... */
1468 if (tags == TAGS_DEFAULT && autotags) {
1469 struct ref **tail = &ref_map;
1470 ref_map = NULL;
1471 find_non_local_tags(remote_refs, &ref_map, &tail);
1472 if (ref_map)
1473 backfill_tags(transport, ref_map);
1474 free_refs(ref_map);
1475 }
1476
1477 cleanup:
1478 return retcode;
1479 }
1480
1481 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1482 {
1483 struct string_list *list = priv;
1484 if (!remote->skip_default_update)
1485 string_list_append(list, remote->name);
1486 return 0;
1487 }
1488
1489 struct remote_group_data {
1490 const char *name;
1491 struct string_list *list;
1492 };
1493
1494 static int get_remote_group(const char *key, const char *value, void *priv)
1495 {
1496 struct remote_group_data *g = priv;
1497
1498 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1499 /* split list by white space */
1500 while (*value) {
1501 size_t wordlen = strcspn(value, " \t\n");
1502
1503 if (wordlen >= 1)
1504 string_list_append_nodup(g->list,
1505 xstrndup(value, wordlen));
1506 value += wordlen + (value[wordlen] != '\0');
1507 }
1508 }
1509
1510 return 0;
1511 }
1512
1513 static int add_remote_or_group(const char *name, struct string_list *list)
1514 {
1515 int prev_nr = list->nr;
1516 struct remote_group_data g;
1517 g.name = name; g.list = list;
1518
1519 git_config(get_remote_group, &g);
1520 if (list->nr == prev_nr) {
1521 struct remote *remote = remote_get(name);
1522 if (!remote_is_configured(remote, 0))
1523 return 0;
1524 string_list_append(list, remote->name);
1525 }
1526 return 1;
1527 }
1528
1529 static void add_options_to_argv(struct strvec *argv)
1530 {
1531 if (dry_run)
1532 strvec_push(argv, "--dry-run");
1533 if (prune != -1)
1534 strvec_push(argv, prune ? "--prune" : "--no-prune");
1535 if (prune_tags != -1)
1536 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1537 if (update_head_ok)
1538 strvec_push(argv, "--update-head-ok");
1539 if (force)
1540 strvec_push(argv, "--force");
1541 if (keep)
1542 strvec_push(argv, "--keep");
1543 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1544 strvec_push(argv, "--recurse-submodules");
1545 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1546 strvec_push(argv, "--recurse-submodules=on-demand");
1547 if (tags == TAGS_SET)
1548 strvec_push(argv, "--tags");
1549 else if (tags == TAGS_UNSET)
1550 strvec_push(argv, "--no-tags");
1551 if (verbosity >= 2)
1552 strvec_push(argv, "-v");
1553 if (verbosity >= 1)
1554 strvec_push(argv, "-v");
1555 else if (verbosity < 0)
1556 strvec_push(argv, "-q");
1557 if (family == TRANSPORT_FAMILY_IPV4)
1558 strvec_push(argv, "--ipv4");
1559 else if (family == TRANSPORT_FAMILY_IPV6)
1560 strvec_push(argv, "--ipv6");
1561 }
1562
1563 /* Fetch multiple remotes in parallel */
1564
1565 struct parallel_fetch_state {
1566 const char **argv;
1567 struct string_list *remotes;
1568 int next, result;
1569 };
1570
1571 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1572 void *cb, void **task_cb)
1573 {
1574 struct parallel_fetch_state *state = cb;
1575 char *remote;
1576
1577 if (state->next < 0 || state->next >= state->remotes->nr)
1578 return 0;
1579
1580 remote = state->remotes->items[state->next++].string;
1581 *task_cb = remote;
1582
1583 strvec_pushv(&cp->args, state->argv);
1584 strvec_push(&cp->args, remote);
1585 cp->git_cmd = 1;
1586
1587 if (verbosity >= 0)
1588 printf(_("Fetching %s\n"), remote);
1589
1590 return 1;
1591 }
1592
1593 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1594 {
1595 struct parallel_fetch_state *state = cb;
1596 const char *remote = task_cb;
1597
1598 state->result = error(_("Could not fetch %s"), remote);
1599
1600 return 0;
1601 }
1602
1603 static int fetch_finished(int result, struct strbuf *out,
1604 void *cb, void *task_cb)
1605 {
1606 struct parallel_fetch_state *state = cb;
1607 const char *remote = task_cb;
1608
1609 if (result) {
1610 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1611 remote, result);
1612 state->result = -1;
1613 }
1614
1615 return 0;
1616 }
1617
1618 static int fetch_multiple(struct string_list *list, int max_children)
1619 {
1620 int i, result = 0;
1621 struct strvec argv = STRVEC_INIT;
1622
1623 if (!append && write_fetch_head) {
1624 int errcode = truncate_fetch_head();
1625 if (errcode)
1626 return errcode;
1627 }
1628
1629 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1630 "--no-write-commit-graph", NULL);
1631 add_options_to_argv(&argv);
1632
1633 if (max_children != 1 && list->nr != 1) {
1634 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1635
1636 strvec_push(&argv, "--end-of-options");
1637 result = run_processes_parallel_tr2(max_children,
1638 &fetch_next_remote,
1639 &fetch_failed_to_start,
1640 &fetch_finished,
1641 &state,
1642 "fetch", "parallel/fetch");
1643
1644 if (!result)
1645 result = state.result;
1646 } else
1647 for (i = 0; i < list->nr; i++) {
1648 const char *name = list->items[i].string;
1649 strvec_push(&argv, name);
1650 if (verbosity >= 0)
1651 printf(_("Fetching %s\n"), name);
1652 if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1653 error(_("Could not fetch %s"), name);
1654 result = 1;
1655 }
1656 strvec_pop(&argv);
1657 }
1658
1659 strvec_clear(&argv);
1660 return !!result;
1661 }
1662
1663 /*
1664 * Fetching from the promisor remote should use the given filter-spec
1665 * or inherit the default filter-spec from the config.
1666 */
1667 static inline void fetch_one_setup_partial(struct remote *remote)
1668 {
1669 /*
1670 * Explicit --no-filter argument overrides everything, regardless
1671 * of any prior partial clones and fetches.
1672 */
1673 if (filter_options.no_filter)
1674 return;
1675
1676 /*
1677 * If no prior partial clone/fetch and the current fetch DID NOT
1678 * request a partial-fetch, do a normal fetch.
1679 */
1680 if (!has_promisor_remote() && !filter_options.choice)
1681 return;
1682
1683 /*
1684 * If this is a partial-fetch request, we enable partial on
1685 * this repo if not already enabled and remember the given
1686 * filter-spec as the default for subsequent fetches to this
1687 * remote if there is currently no default filter-spec.
1688 */
1689 if (filter_options.choice) {
1690 partial_clone_register(remote->name, &filter_options);
1691 return;
1692 }
1693
1694 /*
1695 * Do a partial-fetch from the promisor remote using either the
1696 * explicitly given filter-spec or inherit the filter-spec from
1697 * the config.
1698 */
1699 if (!filter_options.choice)
1700 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1701 return;
1702 }
1703
1704 static int fetch_one(struct remote *remote, int argc, const char **argv,
1705 int prune_tags_ok, int use_stdin_refspecs)
1706 {
1707 struct refspec rs = REFSPEC_INIT_FETCH;
1708 int i;
1709 int exit_code;
1710 int maybe_prune_tags;
1711 int remote_via_config = remote_is_configured(remote, 0);
1712
1713 if (!remote)
1714 die(_("No remote repository specified. Please, specify either a URL or a\n"
1715 "remote name from which new revisions should be fetched."));
1716
1717 gtransport = prepare_transport(remote, 1);
1718
1719 if (prune < 0) {
1720 /* no command line request */
1721 if (0 <= remote->prune)
1722 prune = remote->prune;
1723 else if (0 <= fetch_prune_config)
1724 prune = fetch_prune_config;
1725 else
1726 prune = PRUNE_BY_DEFAULT;
1727 }
1728
1729 if (prune_tags < 0) {
1730 /* no command line request */
1731 if (0 <= remote->prune_tags)
1732 prune_tags = remote->prune_tags;
1733 else if (0 <= fetch_prune_tags_config)
1734 prune_tags = fetch_prune_tags_config;
1735 else
1736 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1737 }
1738
1739 maybe_prune_tags = prune_tags_ok && prune_tags;
1740 if (maybe_prune_tags && remote_via_config)
1741 refspec_append(&remote->fetch, TAG_REFSPEC);
1742
1743 if (maybe_prune_tags && (argc || !remote_via_config))
1744 refspec_append(&rs, TAG_REFSPEC);
1745
1746 for (i = 0; i < argc; i++) {
1747 if (!strcmp(argv[i], "tag")) {
1748 i++;
1749 if (i >= argc)
1750 die(_("You need to specify a tag name."));
1751
1752 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
1753 argv[i], argv[i]);
1754 } else {
1755 refspec_append(&rs, argv[i]);
1756 }
1757 }
1758
1759 if (use_stdin_refspecs) {
1760 struct strbuf line = STRBUF_INIT;
1761 while (strbuf_getline_lf(&line, stdin) != EOF)
1762 refspec_append(&rs, line.buf);
1763 strbuf_release(&line);
1764 }
1765
1766 if (server_options.nr)
1767 gtransport->server_options = &server_options;
1768
1769 sigchain_push_common(unlock_pack_on_signal);
1770 atexit(unlock_pack);
1771 sigchain_push(SIGPIPE, SIG_IGN);
1772 exit_code = do_fetch(gtransport, &rs);
1773 sigchain_pop(SIGPIPE);
1774 refspec_clear(&rs);
1775 transport_disconnect(gtransport);
1776 gtransport = NULL;
1777 return exit_code;
1778 }
1779
1780 int cmd_fetch(int argc, const char **argv, const char *prefix)
1781 {
1782 int i;
1783 struct string_list list = STRING_LIST_INIT_DUP;
1784 struct remote *remote = NULL;
1785 int result = 0;
1786 int prune_tags_ok = 1;
1787
1788 packet_trace_identity("fetch");
1789
1790 /* Record the command line for the reflog */
1791 strbuf_addstr(&default_rla, "fetch");
1792 for (i = 1; i < argc; i++) {
1793 /* This handles non-URLs gracefully */
1794 char *anon = transport_anonymize_url(argv[i]);
1795
1796 strbuf_addf(&default_rla, " %s", anon);
1797 free(anon);
1798 }
1799
1800 git_config(git_fetch_config, NULL);
1801
1802 argc = parse_options(argc, argv, prefix,
1803 builtin_fetch_options, builtin_fetch_usage, 0);
1804 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1805 int *sfjc = submodule_fetch_jobs_config == -1
1806 ? &submodule_fetch_jobs_config : NULL;
1807 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
1808 ? &recurse_submodules : NULL;
1809
1810 fetch_config_from_gitmodules(sfjc, rs);
1811 }
1812
1813 if (deepen_relative) {
1814 if (deepen_relative < 0)
1815 die(_("Negative depth in --deepen is not supported"));
1816 if (depth)
1817 die(_("--deepen and --depth are mutually exclusive"));
1818 depth = xstrfmt("%d", deepen_relative);
1819 }
1820 if (unshallow) {
1821 if (depth)
1822 die(_("--depth and --unshallow cannot be used together"));
1823 else if (!is_repository_shallow(the_repository))
1824 die(_("--unshallow on a complete repository does not make sense"));
1825 else
1826 depth = xstrfmt("%d", INFINITE_DEPTH);
1827 }
1828
1829 /* no need to be strict, transport_set_option() will validate it again */
1830 if (depth && atoi(depth) < 1)
1831 die(_("depth %s is not a positive number"), depth);
1832 if (depth || deepen_since || deepen_not.nr)
1833 deepen = 1;
1834
1835 /* FETCH_HEAD never gets updated in --dry-run mode */
1836 if (dry_run)
1837 write_fetch_head = 0;
1838
1839 if (all) {
1840 if (argc == 1)
1841 die(_("fetch --all does not take a repository argument"));
1842 else if (argc > 1)
1843 die(_("fetch --all does not make sense with refspecs"));
1844 (void) for_each_remote(get_one_remote_for_fetch, &list);
1845 } else if (argc == 0) {
1846 /* No arguments -- use default remote */
1847 remote = remote_get(NULL);
1848 } else if (multiple) {
1849 /* All arguments are assumed to be remotes or groups */
1850 for (i = 0; i < argc; i++)
1851 if (!add_remote_or_group(argv[i], &list))
1852 die(_("No such remote or remote group: %s"), argv[i]);
1853 } else {
1854 /* Single remote or group */
1855 (void) add_remote_or_group(argv[0], &list);
1856 if (list.nr > 1) {
1857 /* More than one remote */
1858 if (argc > 1)
1859 die(_("Fetching a group and specifying refspecs does not make sense"));
1860 } else {
1861 /* Zero or one remotes */
1862 remote = remote_get(argv[0]);
1863 prune_tags_ok = (argc == 1);
1864 argc--;
1865 argv++;
1866 }
1867 }
1868
1869 if (remote) {
1870 if (filter_options.choice || has_promisor_remote())
1871 fetch_one_setup_partial(remote);
1872 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
1873 } else {
1874 int max_children = max_jobs;
1875
1876 if (filter_options.choice)
1877 die(_("--filter can only be used with the remote "
1878 "configured in extensions.partialclone"));
1879
1880 if (stdin_refspecs)
1881 die(_("--stdin can only be used when fetching "
1882 "from one remote"));
1883
1884 if (max_children < 0)
1885 max_children = fetch_parallel_config;
1886
1887 /* TODO should this also die if we have a previous partial-clone? */
1888 result = fetch_multiple(&list, max_children);
1889 }
1890
1891 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1892 struct strvec options = STRVEC_INIT;
1893 int max_children = max_jobs;
1894
1895 if (max_children < 0)
1896 max_children = submodule_fetch_jobs_config;
1897 if (max_children < 0)
1898 max_children = fetch_parallel_config;
1899
1900 add_options_to_argv(&options);
1901 result = fetch_populated_submodules(the_repository,
1902 &options,
1903 submodule_prefix,
1904 recurse_submodules,
1905 recurse_submodules_default,
1906 verbosity < 0,
1907 max_children);
1908 strvec_clear(&options);
1909 }
1910
1911 string_list_clear(&list, 0);
1912
1913 prepare_repo_settings(the_repository);
1914 if (fetch_write_commit_graph > 0 ||
1915 (fetch_write_commit_graph < 0 &&
1916 the_repository->settings.fetch_write_commit_graph)) {
1917 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
1918
1919 if (progress)
1920 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
1921
1922 write_commit_graph_reachable(the_repository->objects->odb,
1923 commit_graph_flags,
1924 NULL);
1925 }
1926
1927 close_object_store(the_repository->objects);
1928
1929 if (enable_auto_gc)
1930 run_auto_maintenance(verbosity < 0);
1931
1932 return result;
1933 }
git for Debian