/* * "git fetch" */ #include "cache.h" #include "refs.h" #include "commit.h" #include "builtin.h" #include "string-list.h" #include "remote.h" #include "transport.h" #include "run-command.h" #include "parse-options.h" #include "sigchain.h" #include "transport.h" #include "submodule.h" #include "connected.h" #include "argv-array.h" static const char * const builtin_fetch_usage[] = { N_("git fetch [] [ [...]]"), N_("git fetch [] "), N_("git fetch --multiple [] [( | )...]"), N_("git fetch --all []"), NULL }; enum { TAGS_UNSET = 0, TAGS_DEFAULT = 1, TAGS_SET = 2 }; static int fetch_prune_config = -1; /* unspecified */ static int prune = -1; /* unspecified */ #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */ static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity; static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT; static int tags = TAGS_DEFAULT, unshallow; static const char *depth; static const char *upload_pack; static struct strbuf default_rla = STRBUF_INIT; static struct transport *gtransport; static struct transport *gsecondary; static const char *submodule_prefix = ""; static const char *recurse_submodules_default; static int option_parse_recurse_submodules(const struct option *opt, const char *arg, int unset) { if (unset) { recurse_submodules = RECURSE_SUBMODULES_OFF; } else { if (arg) recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg); else recurse_submodules = RECURSE_SUBMODULES_ON; } return 0; } static int git_fetch_config(const char *k, const char *v, void *cb) { if (!strcmp(k, "fetch.prune")) { fetch_prune_config = git_config_bool(k, v); return 0; } return 0; } static struct option builtin_fetch_options[] = { OPT__VERBOSITY(&verbosity), OPT_BOOL(0, "all", &all, N_("fetch from all remotes")), OPT_BOOL('a', "append", &append, N_("append to .git/FETCH_HEAD instead of overwriting")), OPT_STRING(0, "upload-pack", &upload_pack, N_("path"), N_("path to upload pack on remote end")), OPT__FORCE(&force, N_("force overwrite of local branch")), OPT_BOOL('m', "multiple", &multiple, N_("fetch from multiple remotes")), OPT_SET_INT('t', "tags", &tags, N_("fetch all tags and associated objects"), TAGS_SET), OPT_SET_INT('n', NULL, &tags, N_("do not fetch all tags (--no-tags)"), TAGS_UNSET), OPT_BOOL('p', "prune", &prune, N_("prune remote-tracking branches no longer on remote")), { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"), N_("control recursive fetching of submodules"), PARSE_OPT_OPTARG, option_parse_recurse_submodules }, OPT_BOOL(0, "dry-run", &dry_run, N_("dry run")), OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")), OPT_BOOL('u', "update-head-ok", &update_head_ok, N_("allow updating of HEAD ref")), OPT_BOOL(0, "progress", &progress, N_("force progress reporting")), OPT_STRING(0, "depth", &depth, N_("depth"), N_("deepen history of shallow clone")), { OPTION_SET_INT, 0, "unshallow", &unshallow, NULL, N_("convert to a complete repository"), PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 }, { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"), N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN }, { OPTION_STRING, 0, "recurse-submodules-default", &recurse_submodules_default, NULL, N_("default mode for recursion"), PARSE_OPT_HIDDEN }, OPT_END() }; static void unlock_pack(void) { if (gtransport) transport_unlock_pack(gtransport); if (gsecondary) transport_unlock_pack(gsecondary); } static void unlock_pack_on_signal(int signo) { unlock_pack(); sigchain_pop(signo); raise(signo); } static void add_merge_config(struct ref **head, const struct ref *remote_refs, struct branch *branch, struct ref ***tail) { int i; for (i = 0; i < branch->merge_nr; i++) { struct ref *rm, **old_tail = *tail; struct refspec refspec; for (rm = *head; rm; rm = rm->next) { if (branch_merge_matches(branch, i, rm->name)) { rm->fetch_head_status = FETCH_HEAD_MERGE; break; } } if (rm) continue; /* * Not fetched to a remote-tracking branch? We need to fetch * it anyway to allow this branch's "branch.$name.merge" * to be honored by 'git pull', but we do not have to * fail if branch.$name.merge is misconfigured to point * at a nonexisting branch. If we were indeed called by * 'git pull', it will notice the misconfiguration because * there is no entry in the resulting FETCH_HEAD marked * for merging. */ memset(&refspec, 0, sizeof(refspec)); refspec.src = branch->merge[i]->src; get_fetch_map(remote_refs, &refspec, tail, 1); for (rm = *old_tail; rm; rm = rm->next) rm->fetch_head_status = FETCH_HEAD_MERGE; } } static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata) { struct string_list *list = (struct string_list *)cbdata; struct string_list_item *item = string_list_insert(list, refname); item->util = xmalloc(20); hashcpy(item->util, sha1); return 0; } static int will_fetch(struct ref **head, const unsigned char *sha1) { struct ref *rm = *head; while (rm) { if (!hashcmp(rm->old_sha1, sha1)) return 1; rm = rm->next; } return 0; } static void find_non_local_tags(struct transport *transport, struct ref **head, struct ref ***tail) { struct string_list existing_refs = STRING_LIST_INIT_DUP; struct string_list remote_refs = STRING_LIST_INIT_NODUP; const struct ref *ref; struct string_list_item *item = NULL; for_each_ref(add_existing, &existing_refs); for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) { if (prefixcmp(ref->name, "refs/tags/")) continue; /* * The peeled ref always follows the matching base * ref, so if we see a peeled ref that we don't want * to fetch then we can mark the ref entry in the list * as one to ignore by setting util to NULL. */ if (!suffixcmp(ref->name, "^{}")) { if (item && !has_sha1_file(ref->old_sha1) && !will_fetch(head, ref->old_sha1) && !has_sha1_file(item->util) && !will_fetch(head, item->util)) item->util = NULL; item = NULL; continue; } /* * If item is non-NULL here, then we previously saw a * ref not followed by a peeled reference, so we need * to check if it is a lightweight tag that we want to * fetch. */ if (item && !has_sha1_file(item->util) && !will_fetch(head, item->util)) item->util = NULL; item = NULL; /* skip duplicates and refs that we already have */ if (string_list_has_string(&remote_refs, ref->name) || string_list_has_string(&existing_refs, ref->name)) continue; item = string_list_insert(&remote_refs, ref->name); item->util = (void *)ref->old_sha1; } string_list_clear(&existing_refs, 1); /* * We may have a final lightweight tag that needs to be * checked to see if it needs fetching. */ if (item && !has_sha1_file(item->util) && !will_fetch(head, item->util)) item->util = NULL; /* * For all the tags in the remote_refs string list, * add them to the list of refs to be fetched */ for_each_string_list_item(item, &remote_refs) { /* Unless we have already decided to ignore this item... */ if (item->util) { struct ref *rm = alloc_ref(item->string); rm->peer_ref = alloc_ref(item->string); hashcpy(rm->old_sha1, item->util); **tail = rm; *tail = &rm->next; } } string_list_clear(&remote_refs, 0); } static struct ref *get_ref_map(struct transport *transport, struct refspec *refspecs, int refspec_count, int tags, int *autotags) { int i; struct ref *rm; struct ref *ref_map = NULL; struct ref **tail = &ref_map; /* opportunistically-updated references: */ struct ref *orefs = NULL, **oref_tail = &orefs; const struct ref *remote_refs = transport_get_remote_refs(transport); if (refspec_count) { for (i = 0; i < refspec_count; i++) { get_fetch_map(remote_refs, &refspecs[i], &tail, 0); if (refspecs[i].dst && refspecs[i].dst[0]) *autotags = 1; } /* Merge everything on the command line (but not --tags) */ for (rm = ref_map; rm; rm = rm->next) rm->fetch_head_status = FETCH_HEAD_MERGE; /* * For any refs that we happen to be fetching via * command-line arguments, the destination ref might * have been missing or have been different than the * remote-tracking ref that would be derived from the * configured refspec. In these cases, we want to * take the opportunity to update their configured * remote-tracking reference. However, we do not want * to mention these entries in FETCH_HEAD at all, as * they would simply be duplicates of existing * entries, so we set them FETCH_HEAD_IGNORE below. * * We compute these entries now, based only on the * refspecs specified on the command line. But we add * them to the list following the refspecs resulting * from the tags option so that one of the latter, * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed * by ref_remove_duplicates() in favor of one of these * opportunistic entries with FETCH_HEAD_IGNORE. */ for (i = 0; i < transport->remote->fetch_refspec_nr; i++) get_fetch_map(ref_map, &transport->remote->fetch[i], &oref_tail, 1); if (tags == TAGS_SET) get_fetch_map(remote_refs, tag_refspec, &tail, 0); } else { /* Use the defaults */ struct remote *remote = transport->remote; struct branch *branch = branch_get(NULL); int has_merge = branch_has_merge_config(branch); if (remote && (remote->fetch_refspec_nr || /* Note: has_merge implies non-NULL branch->remote_name */ (has_merge && !strcmp(branch->remote_name, remote->name)))) { for (i = 0; i < remote->fetch_refspec_nr; i++) { get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0); if (remote->fetch[i].dst && remote->fetch[i].dst[0]) *autotags = 1; if (!i && !has_merge && ref_map && !remote->fetch[0].pattern) ref_map->fetch_head_status = FETCH_HEAD_MERGE; } /* * if the remote we're fetching from is the same * as given in branch..remote, we add the * ref given in branch..merge, too. * * Note: has_merge implies non-NULL branch->remote_name */ if (has_merge && !strcmp(branch->remote_name, remote->name)) add_merge_config(&ref_map, remote_refs, branch, &tail); } else { ref_map = get_remote_ref(remote_refs, "HEAD"); if (!ref_map) die(_("Couldn't find remote ref HEAD")); ref_map->fetch_head_status = FETCH_HEAD_MERGE; tail = &ref_map->next; } } if (tags == TAGS_SET) /* also fetch all tags */ get_fetch_map(remote_refs, tag_refspec, &tail, 0); else if (tags == TAGS_DEFAULT && *autotags) find_non_local_tags(transport, &ref_map, &tail); /* Now append any refs to be updated opportunistically: */ *tail = orefs; for (rm = orefs; rm; rm = rm->next) { rm->fetch_head_status = FETCH_HEAD_IGNORE; tail = &rm->next; } ref_remove_duplicates(ref_map); return ref_map; } #define STORE_REF_ERROR_OTHER 1 #define STORE_REF_ERROR_DF_CONFLICT 2 static int s_update_ref(const char *action, struct ref *ref, int check_old) { char msg[1024]; char *rla = getenv("GIT_REFLOG_ACTION"); static struct ref_lock *lock; if (dry_run) return 0; if (!rla) rla = default_rla.buf; snprintf(msg, sizeof(msg), "%s: %s", rla, action); lock = lock_any_ref_for_update(ref->name, check_old ? ref->old_sha1 : NULL, 0, NULL); if (!lock) return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT : STORE_REF_ERROR_OTHER; if (write_ref_sha1(lock, ref->new_sha1, msg) < 0) return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT : STORE_REF_ERROR_OTHER; return 0; } #define REFCOL_WIDTH 10 static int update_local_ref(struct ref *ref, const char *remote, const struct ref *remote_ref, struct strbuf *display) { struct commit *current = NULL, *updated; enum object_type type; struct branch *current_branch = branch_get(NULL); const char *pretty_ref = prettify_refname(ref->name); type = sha1_object_info(ref->new_sha1, NULL); if (type < 0) die(_("object %s not found"), sha1_to_hex(ref->new_sha1)); if (!hashcmp(ref->old_sha1, ref->new_sha1)) { if (verbosity > 0) strbuf_addf(display, "= %-*s %-*s -> %s", TRANSPORT_SUMMARY(_("[up to date]")), REFCOL_WIDTH, remote, pretty_ref); return 0; } if (current_branch && !strcmp(ref->name, current_branch->name) && !(update_head_ok || is_bare_repository()) && !is_null_sha1(ref->old_sha1)) { /* * If this is the head, and it's not okay to update * the head, and the old value of the head isn't empty... */ strbuf_addf(display, _("! %-*s %-*s -> %s (can't fetch in current branch)"), TRANSPORT_SUMMARY(_("[rejected]")), REFCOL_WIDTH, remote, pretty_ref); return 1; } if (!is_null_sha1(ref->old_sha1) && !prefixcmp(ref->name, "refs/tags/")) { int r; r = s_update_ref("updating tag", ref, 0); strbuf_addf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-', TRANSPORT_SUMMARY(_("[tag update]")), REFCOL_WIDTH, remote, pretty_ref, r ? _(" (unable to update local ref)") : ""); return r; } current = lookup_commit_reference_gently(ref->old_sha1, 1); updated = lookup_commit_reference_gently(ref->new_sha1, 1); if (!current || !updated) { const char *msg; const char *what; int r; /* * Nicely describe the new ref we're fetching. * Base this on the remote's ref name, as it's * more likely to follow a standard layout. */ const char *name = remote_ref ? remote_ref->name : ""; if (!prefixcmp(name, "refs/tags/")) { msg = "storing tag"; what = _("[new tag]"); } else if (!prefixcmp(name, "refs/heads/")) { msg = "storing head"; what = _("[new branch]"); } else { msg = "storing ref"; what = _("[new ref]"); } if ((recurse_submodules != RECURSE_SUBMODULES_OFF) && (recurse_submodules != RECURSE_SUBMODULES_ON)) check_for_new_submodule_commits(ref->new_sha1); r = s_update_ref(msg, ref, 0); strbuf_addf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*', TRANSPORT_SUMMARY(what), REFCOL_WIDTH, remote, pretty_ref, r ? _(" (unable to update local ref)") : ""); return r; } if (in_merge_bases(current, updated)) { char quickref[83]; int r; strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV)); strcat(quickref, ".."); strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV)); if ((recurse_submodules != RECURSE_SUBMODULES_OFF) && (recurse_submodules != RECURSE_SUBMODULES_ON)) check_for_new_submodule_commits(ref->new_sha1); r = s_update_ref("fast-forward", ref, 1); strbuf_addf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ', TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote, pretty_ref, r ? _(" (unable to update local ref)") : ""); return r; } else if (force || ref->force) { char quickref[84]; int r; strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV)); strcat(quickref, "..."); strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV)); if ((recurse_submodules != RECURSE_SUBMODULES_OFF) && (recurse_submodules != RECURSE_SUBMODULES_ON)) check_for_new_submodule_commits(ref->new_sha1); r = s_update_ref("forced-update", ref, 1); strbuf_addf(display, "%c %-*s %-*s -> %s (%s)", r ? '!' : '+', TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote, pretty_ref, r ? _("unable to update local ref") : _("forced update")); return r; } else { strbuf_addf(display, "! %-*s %-*s -> %s %s", TRANSPORT_SUMMARY(_("[rejected]")), REFCOL_WIDTH, remote, pretty_ref, _("(non-fast-forward)")); return 1; } } static int iterate_ref_map(void *cb_data, unsigned char sha1[20]) { struct ref **rm = cb_data; struct ref *ref = *rm; if (!ref) return -1; /* end of the list */ *rm = ref->next; hashcpy(sha1, ref->old_sha1); return 0; } static int store_updated_refs(const char *raw_url, const char *remote_name, struct ref *ref_map) { FILE *fp; struct commit *commit; int url_len, i, shown_url = 0, rc = 0; struct strbuf note = STRBUF_INIT; const char *what, *kind; struct ref *rm; char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD"); int want_status; fp = fopen(filename, "a"); if (!fp) return error(_("cannot open %s: %s\n"), filename, strerror(errno)); if (raw_url) url = transport_anonymize_url(raw_url); else url = xstrdup("foreign"); rm = ref_map; if (check_everything_connected(iterate_ref_map, 0, &rm)) { rc = error(_("%s did not send all necessary objects\n"), url); goto abort; } /* * We do a pass for each fetch_head_status type in their enum order, so * merged entries are written before not-for-merge. That lets readers * use FETCH_HEAD as a refname to refer to the ref to be merged. */ for (want_status = FETCH_HEAD_MERGE; want_status <= FETCH_HEAD_IGNORE; want_status++) { for (rm = ref_map; rm; rm = rm->next) { struct ref *ref = NULL; const char *merge_status_marker = ""; commit = lookup_commit_reference_gently(rm->old_sha1, 1); if (!commit) rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE; if (rm->fetch_head_status != want_status) continue; if (rm->peer_ref) { ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1); strcpy(ref->name, rm->peer_ref->name); hashcpy(ref->old_sha1, rm->peer_ref->old_sha1); hashcpy(ref->new_sha1, rm->old_sha1); ref->force = rm->peer_ref->force; } if (!strcmp(rm->name, "HEAD")) { kind = ""; what = ""; } else if (!prefixcmp(rm->name, "refs/heads/")) { kind = "branch"; what = rm->name + 11; } else if (!prefixcmp(rm->name, "refs/tags/")) { kind = "tag"; what = rm->name + 10; } else if (!prefixcmp(rm->name, "refs/remotes/")) { kind = "remote-tracking branch"; what = rm->name + 13; } else { kind = ""; what = rm->name; } url_len = strlen(url); for (i = url_len - 1; url[i] == '/' && 0 <= i; i--) ; url_len = i + 1; if (4 < i && !strncmp(".git", url + i - 3, 4)) url_len = i - 3; strbuf_reset(¬e); if (*what) { if (*kind) strbuf_addf(¬e, "%s ", kind); strbuf_addf(¬e, "'%s' of ", what); } switch (rm->fetch_head_status) { case FETCH_HEAD_NOT_FOR_MERGE: merge_status_marker = "not-for-merge"; /* fall-through */ case FETCH_HEAD_MERGE: fprintf(fp, "%s\t%s\t%s", sha1_to_hex(rm->old_sha1), merge_status_marker, note.buf); for (i = 0; i < url_len; ++i) if ('\n' == url[i]) fputs("\\n", fp); else fputc(url[i], fp); fputc('\n', fp); break; default: /* do not write anything to FETCH_HEAD */ break; } strbuf_reset(¬e); if (ref) { rc |= update_local_ref(ref, what, rm, ¬e); free(ref); } else strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD", TRANSPORT_SUMMARY_WIDTH, *kind ? kind : "branch", REFCOL_WIDTH, *what ? what : "HEAD"); if (note.len) { if (verbosity >= 0 && !shown_url) { fprintf(stderr, _("From %.*s\n"), url_len, url); shown_url = 1; } if (verbosity >= 0) fprintf(stderr, " %s\n", note.buf); } } } if (rc & STORE_REF_ERROR_DF_CONFLICT) error(_("some local refs could not be updated; try running\n" " 'git remote prune %s' to remove any old, conflicting " "branches"), remote_name); abort: strbuf_release(¬e); free(url); fclose(fp); return rc; } /* * We would want to bypass the object transfer altogether if * everything we are going to fetch already exists and is connected * locally. */ static int quickfetch(struct ref *ref_map) { struct ref *rm = ref_map; /* * If we are deepening a shallow clone we already have these * objects reachable. Running rev-list here will return with * a good (0) exit status and we'll bypass the fetch that we * really need to perform. Claiming failure now will ensure * we perform the network exchange to deepen our history. */ if (depth) return -1; return check_everything_connected(iterate_ref_map, 1, &rm); } static int fetch_refs(struct transport *transport, struct ref *ref_map) { int ret = quickfetch(ref_map); if (ret) ret = transport_fetch_refs(transport, ref_map); if (!ret) ret |= store_updated_refs(transport->url, transport->remote->name, ref_map); transport_unlock_pack(transport); return ret; } static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map) { int result = 0; struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map); const char *dangling_msg = dry_run ? _(" (%s will become dangling)") : _(" (%s has become dangling)"); for (ref = stale_refs; ref; ref = ref->next) { if (!dry_run) result |= delete_ref(ref->name, NULL, 0); if (verbosity >= 0) { fprintf(stderr, " x %-*s %-*s -> %s\n", TRANSPORT_SUMMARY(_("[deleted]")), REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name)); warn_dangling_symref(stderr, dangling_msg, ref->name); } } free_refs(stale_refs); return result; } static void check_not_current_branch(struct ref *ref_map) { struct branch *current_branch = branch_get(NULL); if (is_bare_repository() || !current_branch) return; for (; ref_map; ref_map = ref_map->next) if (ref_map->peer_ref && !strcmp(current_branch->refname, ref_map->peer_ref->name)) die(_("Refusing to fetch into current branch %s " "of non-bare repository"), current_branch->refname); } static int truncate_fetch_head(void) { char *filename = git_path("FETCH_HEAD"); FILE *fp = fopen(filename, "w"); if (!fp) return error(_("cannot open %s: %s\n"), filename, strerror(errno)); fclose(fp); return 0; } static void set_option(struct transport *transport, const char *name, const char *value) { int r = transport_set_option(transport, name, value); if (r < 0) die(_("Option \"%s\" value \"%s\" is not valid for %s"), name, value, transport->url); if (r > 0) warning(_("Option \"%s\" is ignored for %s\n"), name, transport->url); } static struct transport *prepare_transport(struct remote *remote) { struct transport *transport; transport = transport_get(remote, NULL); transport_set_verbosity(transport, verbosity, progress); if (upload_pack) set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack); if (keep) set_option(transport, TRANS_OPT_KEEP, "yes"); if (depth) set_option(transport, TRANS_OPT_DEPTH, depth); return transport; } static void backfill_tags(struct transport *transport, struct ref *ref_map) { if (transport->cannot_reuse) { gsecondary = prepare_transport(transport->remote); transport = gsecondary; } transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL); transport_set_option(transport, TRANS_OPT_DEPTH, "0"); fetch_refs(transport, ref_map); if (gsecondary) { transport_disconnect(gsecondary); gsecondary = NULL; } } static int do_fetch(struct transport *transport, struct refspec *refs, int ref_count) { struct string_list existing_refs = STRING_LIST_INIT_DUP; struct ref *ref_map; struct ref *rm; int autotags = (transport->remote->fetch_tags == 1); int retcode = 0; for_each_ref(add_existing, &existing_refs); if (tags == TAGS_DEFAULT) { if (transport->remote->fetch_tags == 2) tags = TAGS_SET; if (transport->remote->fetch_tags == -1) tags = TAGS_UNSET; } if (!transport->get_refs_list || !transport->fetch) die(_("Don't know how to fetch from %s"), transport->url); /* if not appending, truncate FETCH_HEAD */ if (!append && !dry_run) { retcode = truncate_fetch_head(); if (retcode) goto cleanup; } ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags); if (!update_head_ok) check_not_current_branch(ref_map); for (rm = ref_map; rm; rm = rm->next) { if (rm->peer_ref) { struct string_list_item *peer_item = string_list_lookup(&existing_refs, rm->peer_ref->name); if (peer_item) hashcpy(rm->peer_ref->old_sha1, peer_item->util); } } if (tags == TAGS_DEFAULT && autotags) transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1"); if (fetch_refs(transport, ref_map)) { free_refs(ref_map); retcode = 1; goto cleanup; } if (prune) { /* * We only prune based on refspecs specified * explicitly (via command line or configuration); we * don't care whether --tags was specified. */ if (ref_count) { prune_refs(refs, ref_count, ref_map); } else { prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map); } } free_refs(ref_map); /* if neither --no-tags nor --tags was specified, do automated tag * following ... */ if (tags == TAGS_DEFAULT && autotags) { struct ref **tail = &ref_map; ref_map = NULL; find_non_local_tags(transport, &ref_map, &tail); if (ref_map) backfill_tags(transport, ref_map); free_refs(ref_map); } cleanup: string_list_clear(&existing_refs, 1); return retcode; } static int get_one_remote_for_fetch(struct remote *remote, void *priv) { struct string_list *list = priv; if (!remote->skip_default_update) string_list_append(list, remote->name); return 0; } struct remote_group_data { const char *name; struct string_list *list; }; static int get_remote_group(const char *key, const char *value, void *priv) { struct remote_group_data *g = priv; if (!prefixcmp(key, "remotes.") && !strcmp(key + 8, g->name)) { /* split list by white space */ int space = strcspn(value, " \t\n"); while (*value) { if (space > 1) { string_list_append(g->list, xstrndup(value, space)); } value += space + (value[space] != '\0'); space = strcspn(value, " \t\n"); } } return 0; } static int add_remote_or_group(const char *name, struct string_list *list) { int prev_nr = list->nr; struct remote_group_data g; g.name = name; g.list = list; git_config(get_remote_group, &g); if (list->nr == prev_nr) { struct remote *remote; if (!remote_is_configured(name)) return 0; remote = remote_get(name); string_list_append(list, remote->name); } return 1; } static void add_options_to_argv(struct argv_array *argv) { if (dry_run) argv_array_push(argv, "--dry-run"); if (prune != -1) argv_array_push(argv, prune ? "--prune" : "--no-prune"); if (update_head_ok) argv_array_push(argv, "--update-head-ok"); if (force) argv_array_push(argv, "--force"); if (keep) argv_array_push(argv, "--keep"); if (recurse_submodules == RECURSE_SUBMODULES_ON) argv_array_push(argv, "--recurse-submodules"); else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) argv_array_push(argv, "--recurse-submodules=on-demand"); if (tags == TAGS_SET) argv_array_push(argv, "--tags"); else if (tags == TAGS_UNSET) argv_array_push(argv, "--no-tags"); if (verbosity >= 2) argv_array_push(argv, "-v"); if (verbosity >= 1) argv_array_push(argv, "-v"); else if (verbosity < 0) argv_array_push(argv, "-q"); } static int fetch_multiple(struct string_list *list) { int i, result = 0; struct argv_array argv = ARGV_ARRAY_INIT; if (!append && !dry_run) { int errcode = truncate_fetch_head(); if (errcode) return errcode; } argv_array_pushl(&argv, "fetch", "--append", NULL); add_options_to_argv(&argv); for (i = 0; i < list->nr; i++) { const char *name = list->items[i].string; argv_array_push(&argv, name); if (verbosity >= 0) printf(_("Fetching %s\n"), name); if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) { error(_("Could not fetch %s"), name); result = 1; } argv_array_pop(&argv); } argv_array_clear(&argv); return result; } static int fetch_one(struct remote *remote, int argc, const char **argv) { int i; static const char **refs = NULL; struct refspec *refspec; int ref_nr = 0; int exit_code; if (!remote) die(_("No remote repository specified. Please, specify either a URL or a\n" "remote name from which new revisions should be fetched.")); gtransport = prepare_transport(remote); if (prune < 0) { /* no command line request */ if (0 <= gtransport->remote->prune) prune = gtransport->remote->prune; else if (0 <= fetch_prune_config) prune = fetch_prune_config; else prune = PRUNE_BY_DEFAULT; } if (argc > 0) { int j = 0; refs = xcalloc(argc + 1, sizeof(const char *)); for (i = 0; i < argc; i++) { if (!strcmp(argv[i], "tag")) { char *ref; i++; if (i >= argc) die(_("You need to specify a tag name.")); ref = xmalloc(strlen(argv[i]) * 2 + 22); strcpy(ref, "refs/tags/"); strcat(ref, argv[i]); strcat(ref, ":refs/tags/"); strcat(ref, argv[i]); refs[j++] = ref; } else refs[j++] = argv[i]; } refs[j] = NULL; ref_nr = j; } sigchain_push_common(unlock_pack_on_signal); atexit(unlock_pack); refspec = parse_fetch_refspec(ref_nr, refs); exit_code = do_fetch(gtransport, refspec, ref_nr); free_refspec(ref_nr, refspec); transport_disconnect(gtransport); gtransport = NULL; return exit_code; } int cmd_fetch(int argc, const char **argv, const char *prefix) { int i; struct string_list list = STRING_LIST_INIT_NODUP; struct remote *remote; int result = 0; static const char *argv_gc_auto[] = { "gc", "--auto", NULL, }; packet_trace_identity("fetch"); /* Record the command line for the reflog */ strbuf_addstr(&default_rla, "fetch"); for (i = 1; i < argc; i++) strbuf_addf(&default_rla, " %s", argv[i]); git_config(git_fetch_config, NULL); argc = parse_options(argc, argv, prefix, builtin_fetch_options, builtin_fetch_usage, 0); if (unshallow) { if (depth) die(_("--depth and --unshallow cannot be used together")); else if (!is_repository_shallow()) die(_("--unshallow on a complete repository does not make sense")); else { static char inf_depth[12]; sprintf(inf_depth, "%d", INFINITE_DEPTH); depth = inf_depth; } } if (recurse_submodules != RECURSE_SUBMODULES_OFF) { if (recurse_submodules_default) { int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default); set_config_fetch_recurse_submodules(arg); } gitmodules_config(); git_config(submodule_config, NULL); } if (all) { if (argc == 1) die(_("fetch --all does not take a repository argument")); else if (argc > 1) die(_("fetch --all does not make sense with refspecs")); (void) for_each_remote(get_one_remote_for_fetch, &list); result = fetch_multiple(&list); } else if (argc == 0) { /* No arguments -- use default remote */ remote = remote_get(NULL); result = fetch_one(remote, argc, argv); } else if (multiple) { /* All arguments are assumed to be remotes or groups */ for (i = 0; i < argc; i++) if (!add_remote_or_group(argv[i], &list)) die(_("No such remote or remote group: %s"), argv[i]); result = fetch_multiple(&list); } else { /* Single remote or group */ (void) add_remote_or_group(argv[0], &list); if (list.nr > 1) { /* More than one remote */ if (argc > 1) die(_("Fetching a group and specifying refspecs does not make sense")); result = fetch_multiple(&list); } else { /* Zero or one remotes */ remote = remote_get(argv[0]); result = fetch_one(remote, argc-1, argv+1); } } if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) { struct argv_array options = ARGV_ARRAY_INIT; add_options_to_argv(&options); result = fetch_populated_submodules(&options, submodule_prefix, recurse_submodules, verbosity < 0); argv_array_clear(&options); } /* All names were strdup()ed or strndup()ed */ list.strdup_strings = 1; string_list_clear(&list, 0); run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); return result; }