#include "cache.h" #include "config.h" #include "remote.h" #include "refs.h" #include "commit.h" #include "diff.h" #include "revision.h" #include "dir.h" #include "tag.h" #include "string-list.h" #include "mergesort.h" #include "argv-array.h" enum map_direction { FROM_SRC, FROM_DST }; static struct refspec s_tag_refspec = { 0, 1, 0, 0, "refs/tags/*", "refs/tags/*" }; /* See TAG_REFSPEC for the string version */ const struct refspec *tag_refspec = &s_tag_refspec; struct counted_string { size_t len; const char *s; }; struct rewrite { const char *base; size_t baselen; struct counted_string *instead_of; int instead_of_nr; int instead_of_alloc; }; struct rewrites { struct rewrite **rewrite; int rewrite_alloc; int rewrite_nr; }; static struct remote **remotes; static int remotes_alloc; static int remotes_nr; static struct hashmap remotes_hash; static struct branch **branches; static int branches_alloc; static int branches_nr; static struct branch *current_branch; static const char *pushremote_name; static struct rewrites rewrites; static struct rewrites rewrites_push; static int valid_remote(const struct remote *remote) { return (!!remote->url) || (!!remote->foreign_vcs); } static const char *alias_url(const char *url, struct rewrites *r) { int i, j; struct counted_string *longest; int longest_i; longest = NULL; longest_i = -1; for (i = 0; i < r->rewrite_nr; i++) { if (!r->rewrite[i]) continue; for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) { if (starts_with(url, r->rewrite[i]->instead_of[j].s) && (!longest || longest->len < r->rewrite[i]->instead_of[j].len)) { longest = &(r->rewrite[i]->instead_of[j]); longest_i = i; } } } if (!longest) return url; return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len); } static void add_push_refspec(struct remote *remote, const char *ref) { ALLOC_GROW(remote->push_refspec, remote->push_refspec_nr + 1, remote->push_refspec_alloc); remote->push_refspec[remote->push_refspec_nr++] = ref; } static void add_fetch_refspec(struct remote *remote, const char *ref) { ALLOC_GROW(remote->fetch_refspec, remote->fetch_refspec_nr + 1, remote->fetch_refspec_alloc); remote->fetch_refspec[remote->fetch_refspec_nr++] = ref; } void add_prune_tags_to_fetch_refspec(struct remote *remote) { int nr = remote->fetch_refspec_nr; int bufsize = nr + 1; int size = sizeof(struct refspec); remote->fetch = xrealloc(remote->fetch, size * bufsize); memcpy(&remote->fetch[nr], tag_refspec, size); add_fetch_refspec(remote, xstrdup(TAG_REFSPEC)); } static void add_url(struct remote *remote, const char *url) { ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc); remote->url[remote->url_nr++] = url; } static void add_pushurl(struct remote *remote, const char *pushurl) { ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc); remote->pushurl[remote->pushurl_nr++] = pushurl; } static void add_pushurl_alias(struct remote *remote, const char *url) { const char *pushurl = alias_url(url, &rewrites_push); if (pushurl != url) add_pushurl(remote, pushurl); } static void add_url_alias(struct remote *remote, const char *url) { add_url(remote, alias_url(url, &rewrites)); add_pushurl_alias(remote, url); } struct remotes_hash_key { const char *str; int len; }; static int remotes_hash_cmp(const void *unused_cmp_data, const void *entry, const void *entry_or_key, const void *keydata) { const struct remote *a = entry; const struct remote *b = entry_or_key; const struct remotes_hash_key *key = keydata; if (key) return strncmp(a->name, key->str, key->len) || a->name[key->len]; else return strcmp(a->name, b->name); } static inline void init_remotes_hash(void) { if (!remotes_hash.cmpfn) hashmap_init(&remotes_hash, remotes_hash_cmp, NULL, 0); } static struct remote *make_remote(const char *name, int len) { struct remote *ret, *replaced; struct remotes_hash_key lookup; struct hashmap_entry lookup_entry; if (!len) len = strlen(name); init_remotes_hash(); lookup.str = name; lookup.len = len; hashmap_entry_init(&lookup_entry, memhash(name, len)); if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL) return ret; ret = xcalloc(1, sizeof(struct remote)); ret->prune = -1; /* unspecified */ ret->prune_tags = -1; /* unspecified */ ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc); remotes[remotes_nr++] = ret; ret->name = xstrndup(name, len); hashmap_entry_init(ret, lookup_entry.hash); replaced = hashmap_put(&remotes_hash, ret); assert(replaced == NULL); /* no previous entry overwritten */ return ret; } static void add_merge(struct branch *branch, const char *name) { ALLOC_GROW(branch->merge_name, branch->merge_nr + 1, branch->merge_alloc); branch->merge_name[branch->merge_nr++] = name; } static struct branch *make_branch(const char *name, int len) { struct branch *ret; int i; for (i = 0; i < branches_nr; i++) { if (len ? (!strncmp(name, branches[i]->name, len) && !branches[i]->name[len]) : !strcmp(name, branches[i]->name)) return branches[i]; } ALLOC_GROW(branches, branches_nr + 1, branches_alloc); ret = xcalloc(1, sizeof(struct branch)); branches[branches_nr++] = ret; if (len) ret->name = xstrndup(name, len); else ret->name = xstrdup(name); ret->refname = xstrfmt("refs/heads/%s", ret->name); return ret; } static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len) { struct rewrite *ret; int i; for (i = 0; i < r->rewrite_nr; i++) { if (len ? (len == r->rewrite[i]->baselen && !strncmp(base, r->rewrite[i]->base, len)) : !strcmp(base, r->rewrite[i]->base)) return r->rewrite[i]; } ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc); ret = xcalloc(1, sizeof(struct rewrite)); r->rewrite[r->rewrite_nr++] = ret; if (len) { ret->base = xstrndup(base, len); ret->baselen = len; } else { ret->base = xstrdup(base); ret->baselen = strlen(base); } return ret; } static void add_instead_of(struct rewrite *rewrite, const char *instead_of) { ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc); rewrite->instead_of[rewrite->instead_of_nr].s = instead_of; rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of); rewrite->instead_of_nr++; } static const char *skip_spaces(const char *s) { while (isspace(*s)) s++; return s; } static void read_remotes_file(struct remote *remote) { struct strbuf buf = STRBUF_INIT; FILE *f = fopen_or_warn(git_path("remotes/%s", remote->name), "r"); if (!f) return; remote->configured_in_repo = 1; remote->origin = REMOTE_REMOTES; while (strbuf_getline(&buf, f) != EOF) { const char *v; strbuf_rtrim(&buf); if (skip_prefix(buf.buf, "URL:", &v)) add_url_alias(remote, xstrdup(skip_spaces(v))); else if (skip_prefix(buf.buf, "Push:", &v)) add_push_refspec(remote, xstrdup(skip_spaces(v))); else if (skip_prefix(buf.buf, "Pull:", &v)) add_fetch_refspec(remote, xstrdup(skip_spaces(v))); } strbuf_release(&buf); fclose(f); } static void read_branches_file(struct remote *remote) { char *frag; struct strbuf buf = STRBUF_INIT; FILE *f = fopen_or_warn(git_path("branches/%s", remote->name), "r"); if (!f) return; strbuf_getline_lf(&buf, f); fclose(f); strbuf_trim(&buf); if (!buf.len) { strbuf_release(&buf); return; } remote->configured_in_repo = 1; remote->origin = REMOTE_BRANCHES; /* * The branches file would have URL and optionally * #branch specified. The "master" (or specified) branch is * fetched and stored in the local branch matching the * remote name. */ frag = strchr(buf.buf, '#'); if (frag) *(frag++) = '\0'; else frag = "master"; add_url_alias(remote, strbuf_detach(&buf, NULL)); add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s", frag, remote->name)); /* * Cogito compatible push: push current HEAD to remote #branch * (master if missing) */ add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag)); remote->fetch_tags = 1; /* always auto-follow */ } static int handle_config(const char *key, const char *value, void *cb) { const char *name; int namelen; const char *subkey; struct remote *remote; struct branch *branch; if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) { if (!name) return 0; branch = make_branch(name, namelen); if (!strcmp(subkey, "remote")) { return git_config_string(&branch->remote_name, key, value); } else if (!strcmp(subkey, "pushremote")) { return git_config_string(&branch->pushremote_name, key, value); } else if (!strcmp(subkey, "merge")) { if (!value) return config_error_nonbool(key); add_merge(branch, xstrdup(value)); } return 0; } if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) { struct rewrite *rewrite; if (!name) return 0; if (!strcmp(subkey, "insteadof")) { rewrite = make_rewrite(&rewrites, name, namelen); if (!value) return config_error_nonbool(key); add_instead_of(rewrite, xstrdup(value)); } else if (!strcmp(subkey, "pushinsteadof")) { rewrite = make_rewrite(&rewrites_push, name, namelen); if (!value) return config_error_nonbool(key); add_instead_of(rewrite, xstrdup(value)); } } if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0) return 0; /* Handle remote.* variables */ if (!name && !strcmp(subkey, "pushdefault")) return git_config_string(&pushremote_name, key, value); if (!name) return 0; /* Handle remote..* variables */ if (*name == '/') { warning("Config remote shorthand cannot begin with '/': %s", name); return 0; } remote = make_remote(name, namelen); remote->origin = REMOTE_CONFIG; if (current_config_scope() == CONFIG_SCOPE_REPO) remote->configured_in_repo = 1; if (!strcmp(subkey, "mirror")) remote->mirror = git_config_bool(key, value); else if (!strcmp(subkey, "skipdefaultupdate")) remote->skip_default_update = git_config_bool(key, value); else if (!strcmp(subkey, "skipfetchall")) remote->skip_default_update = git_config_bool(key, value); else if (!strcmp(subkey, "prune")) remote->prune = git_config_bool(key, value); else if (!strcmp(subkey, "prunetags")) remote->prune_tags = git_config_bool(key, value); else if (!strcmp(subkey, "url")) { const char *v; if (git_config_string(&v, key, value)) return -1; add_url(remote, v); } else if (!strcmp(subkey, "pushurl")) { const char *v; if (git_config_string(&v, key, value)) return -1; add_pushurl(remote, v); } else if (!strcmp(subkey, "push")) { const char *v; if (git_config_string(&v, key, value)) return -1; add_push_refspec(remote, v); } else if (!strcmp(subkey, "fetch")) { const char *v; if (git_config_string(&v, key, value)) return -1; add_fetch_refspec(remote, v); } else if (!strcmp(subkey, "receivepack")) { const char *v; if (git_config_string(&v, key, value)) return -1; if (!remote->receivepack) remote->receivepack = v; else error("more than one receivepack given, using the first"); } else if (!strcmp(subkey, "uploadpack")) { const char *v; if (git_config_string(&v, key, value)) return -1; if (!remote->uploadpack) remote->uploadpack = v; else error("more than one uploadpack given, using the first"); } else if (!strcmp(subkey, "tagopt")) { if (!strcmp(value, "--no-tags")) remote->fetch_tags = -1; else if (!strcmp(value, "--tags")) remote->fetch_tags = 2; } else if (!strcmp(subkey, "proxy")) { return git_config_string((const char **)&remote->http_proxy, key, value); } else if (!strcmp(subkey, "proxyauthmethod")) { return git_config_string((const char **)&remote->http_proxy_authmethod, key, value); } else if (!strcmp(subkey, "vcs")) { return git_config_string(&remote->foreign_vcs, key, value); } return 0; } static void alias_all_urls(void) { int i, j; for (i = 0; i < remotes_nr; i++) { int add_pushurl_aliases; if (!remotes[i]) continue; for (j = 0; j < remotes[i]->pushurl_nr; j++) { remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites); } add_pushurl_aliases = remotes[i]->pushurl_nr == 0; for (j = 0; j < remotes[i]->url_nr; j++) { if (add_pushurl_aliases) add_pushurl_alias(remotes[i], remotes[i]->url[j]); remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites); } } } static void read_config(void) { static int loaded; int flag; if (loaded) return; loaded = 1; current_branch = NULL; if (startup_info->have_repository) { const char *head_ref = resolve_ref_unsafe("HEAD", 0, NULL, &flag); if (head_ref && (flag & REF_ISSYMREF) && skip_prefix(head_ref, "refs/heads/", &head_ref)) { current_branch = make_branch(head_ref, 0); } } git_config(handle_config, NULL); alias_all_urls(); } static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify) { int i; struct refspec *rs = xcalloc(nr_refspec, sizeof(*rs)); for (i = 0; i < nr_refspec; i++) { size_t llen; int is_glob; const char *lhs, *rhs; int flags; is_glob = 0; lhs = refspec[i]; if (*lhs == '+') { rs[i].force = 1; lhs++; } rhs = strrchr(lhs, ':'); /* * Before going on, special case ":" (or "+:") as a refspec * for pushing matching refs. */ if (!fetch && rhs == lhs && rhs[1] == '\0') { rs[i].matching = 1; continue; } if (rhs) { size_t rlen = strlen(++rhs); is_glob = (1 <= rlen && strchr(rhs, '*')); rs[i].dst = xstrndup(rhs, rlen); } llen = (rhs ? (rhs - lhs - 1) : strlen(lhs)); if (1 <= llen && memchr(lhs, '*', llen)) { if ((rhs && !is_glob) || (!rhs && fetch)) goto invalid; is_glob = 1; } else if (rhs && is_glob) { goto invalid; } rs[i].pattern = is_glob; rs[i].src = xstrndup(lhs, llen); flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); if (fetch) { struct object_id unused; /* LHS */ if (!*rs[i].src) ; /* empty is ok; it means "HEAD" */ else if (llen == GIT_SHA1_HEXSZ && !get_oid_hex(rs[i].src, &unused)) rs[i].exact_sha1 = 1; /* ok */ else if (!check_refname_format(rs[i].src, flags)) ; /* valid looking ref is ok */ else goto invalid; /* RHS */ if (!rs[i].dst) ; /* missing is ok; it is the same as empty */ else if (!*rs[i].dst) ; /* empty is ok; it means "do not store" */ else if (!check_refname_format(rs[i].dst, flags)) ; /* valid looking ref is ok */ else goto invalid; } else { /* * LHS * - empty is allowed; it means delete. * - when wildcarded, it must be a valid looking ref. * - otherwise, it must be an extended SHA-1, but * there is no existing way to validate this. */ if (!*rs[i].src) ; /* empty is ok */ else if (is_glob) { if (check_refname_format(rs[i].src, flags)) goto invalid; } else ; /* anything goes, for now */ /* * RHS * - missing is allowed, but LHS then must be a * valid looking ref. * - empty is not allowed. * - otherwise it must be a valid looking ref. */ if (!rs[i].dst) { if (check_refname_format(rs[i].src, flags)) goto invalid; } else if (!*rs[i].dst) { goto invalid; } else { if (check_refname_format(rs[i].dst, flags)) goto invalid; } } } return rs; invalid: if (verify) { /* * nr_refspec must be greater than zero and i must be valid * since it is only possible to reach this point from within * the for loop above. */ free_refspec(i+1, rs); return NULL; } die("Invalid refspec '%s'", refspec[i]); } int valid_fetch_refspec(const char *fetch_refspec_str) { struct refspec *refspec; refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1); free_refspec(1, refspec); return !!refspec; } struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec) { return parse_refspec_internal(nr_refspec, refspec, 1, 0); } struct refspec *parse_push_refspec(int nr_refspec, const char **refspec) { return parse_refspec_internal(nr_refspec, refspec, 0, 0); } void free_refspec(int nr_refspec, struct refspec *refspec) { int i; if (!refspec) return; for (i = 0; i < nr_refspec; i++) { free(refspec[i].src); free(refspec[i].dst); } free(refspec); } static int valid_remote_nick(const char *name) { if (!name[0] || is_dot_or_dotdot(name)) return 0; /* remote nicknames cannot contain slashes */ while (*name) if (is_dir_sep(*name++)) return 0; return 1; } const char *remote_for_branch(struct branch *branch, int *explicit) { if (branch && branch->remote_name) { if (explicit) *explicit = 1; return branch->remote_name; } if (explicit) *explicit = 0; return "origin"; } const char *pushremote_for_branch(struct branch *branch, int *explicit) { if (branch && branch->pushremote_name) { if (explicit) *explicit = 1; return branch->pushremote_name; } if (pushremote_name) { if (explicit) *explicit = 1; return pushremote_name; } return remote_for_branch(branch, explicit); } const char *remote_ref_for_branch(struct branch *branch, int for_push, int *explicit) { if (branch) { if (!for_push) { if (branch->merge_nr) { if (explicit) *explicit = 1; return branch->merge_name[0]; } } else { const char *dst, *remote_name = pushremote_for_branch(branch, NULL); struct remote *remote = remote_get(remote_name); if (remote && remote->push_refspec_nr && (dst = apply_refspecs(remote->push, remote->push_refspec_nr, branch->refname))) { if (explicit) *explicit = 1; return dst; } } } if (explicit) *explicit = 0; return ""; } static struct remote *remote_get_1(const char *name, const char *(*get_default)(struct branch *, int *)) { struct remote *ret; int name_given = 0; read_config(); if (name) name_given = 1; else name = get_default(current_branch, &name_given); ret = make_remote(name, 0); if (valid_remote_nick(name) && have_git_dir()) { if (!valid_remote(ret)) read_remotes_file(ret); if (!valid_remote(ret)) read_branches_file(ret); } if (name_given && !valid_remote(ret)) add_url_alias(ret, name); if (!valid_remote(ret)) return NULL; ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec); ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec); return ret; } struct remote *remote_get(const char *name) { return remote_get_1(name, remote_for_branch); } struct remote *pushremote_get(const char *name) { return remote_get_1(name, pushremote_for_branch); } int remote_is_configured(struct remote *remote, int in_repo) { if (!remote) return 0; if (in_repo) return remote->configured_in_repo; return !!remote->origin; } int for_each_remote(each_remote_fn fn, void *priv) { int i, result = 0; read_config(); for (i = 0; i < remotes_nr && !result; i++) { struct remote *r = remotes[i]; if (!r) continue; if (!r->fetch) r->fetch = parse_fetch_refspec(r->fetch_refspec_nr, r->fetch_refspec); if (!r->push) r->push = parse_push_refspec(r->push_refspec_nr, r->push_refspec); result = fn(r, priv); } return result; } static void handle_duplicate(struct ref *ref1, struct ref *ref2) { if (strcmp(ref1->name, ref2->name)) { if (ref1->fetch_head_status != FETCH_HEAD_IGNORE && ref2->fetch_head_status != FETCH_HEAD_IGNORE) { die(_("Cannot fetch both %s and %s to %s"), ref1->name, ref2->name, ref2->peer_ref->name); } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE && ref2->fetch_head_status == FETCH_HEAD_IGNORE) { warning(_("%s usually tracks %s, not %s"), ref2->peer_ref->name, ref2->name, ref1->name); } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE && ref2->fetch_head_status == FETCH_HEAD_IGNORE) { die(_("%s tracks both %s and %s"), ref2->peer_ref->name, ref1->name, ref2->name); } else { /* * This last possibility doesn't occur because * FETCH_HEAD_IGNORE entries always appear at * the end of the list. */ die(_("Internal error")); } } free(ref2->peer_ref); free(ref2); } struct ref *ref_remove_duplicates(struct ref *ref_map) { struct string_list refs = STRING_LIST_INIT_NODUP; struct ref *retval = NULL; struct ref **p = &retval; while (ref_map) { struct ref *ref = ref_map; ref_map = ref_map->next; ref->next = NULL; if (!ref->peer_ref) { *p = ref; p = &ref->next; } else { struct string_list_item *item = string_list_insert(&refs, ref->peer_ref->name); if (item->util) { /* Entry already existed */ handle_duplicate((struct ref *)item->util, ref); } else { *p = ref; p = &ref->next; item->util = ref; } } } string_list_clear(&refs, 0); return retval; } int remote_has_url(struct remote *remote, const char *url) { int i; for (i = 0; i < remote->url_nr; i++) { if (!strcmp(remote->url[i], url)) return 1; } return 0; } static int match_name_with_pattern(const char *key, const char *name, const char *value, char **result) { const char *kstar = strchr(key, '*'); size_t klen; size_t ksuffixlen; size_t namelen; int ret; if (!kstar) die("Key '%s' of pattern had no '*'", key); klen = kstar - key; ksuffixlen = strlen(kstar + 1); namelen = strlen(name); ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen && !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen); if (ret && value) { struct strbuf sb = STRBUF_INIT; const char *vstar = strchr(value, '*'); if (!vstar) die("Value '%s' of pattern has no '*'", value); strbuf_add(&sb, value, vstar - value); strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen); strbuf_addstr(&sb, vstar + 1); *result = strbuf_detach(&sb, NULL); } return ret; } static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results) { int i; int find_src = !query->src; if (find_src && !query->dst) error("query_refspecs_multiple: need either src or dst"); for (i = 0; i < ref_count; i++) { struct refspec *refspec = &refs[i]; const char *key = find_src ? refspec->dst : refspec->src; const char *value = find_src ? refspec->src : refspec->dst; const char *needle = find_src ? query->dst : query->src; char **result = find_src ? &query->src : &query->dst; if (!refspec->dst) continue; if (refspec->pattern) { if (match_name_with_pattern(key, needle, value, result)) string_list_append_nodup(results, *result); } else if (!strcmp(needle, key)) { string_list_append(results, value); } } } int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query) { int i; int find_src = !query->src; const char *needle = find_src ? query->dst : query->src; char **result = find_src ? &query->src : &query->dst; if (find_src && !query->dst) return error("query_refspecs: need either src or dst"); for (i = 0; i < ref_count; i++) { struct refspec *refspec = &refs[i]; const char *key = find_src ? refspec->dst : refspec->src; const char *value = find_src ? refspec->src : refspec->dst; if (!refspec->dst) continue; if (refspec->pattern) { if (match_name_with_pattern(key, needle, value, result)) { query->force = refspec->force; return 0; } } else if (!strcmp(needle, key)) { *result = xstrdup(value); query->force = refspec->force; return 0; } } return -1; } char *apply_refspecs(struct refspec *refspecs, int nr_refspec, const char *name) { struct refspec query; memset(&query, 0, sizeof(struct refspec)); query.src = (char *)name; if (query_refspecs(refspecs, nr_refspec, &query)) return NULL; return query.dst; } int remote_find_tracking(struct remote *remote, struct refspec *refspec) { return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec); } static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen, const char *name) { size_t len = strlen(name); struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1)); memcpy(ref->name, prefix, prefixlen); memcpy(ref->name + prefixlen, name, len); return ref; } struct ref *alloc_ref(const char *name) { return alloc_ref_with_prefix("", 0, name); } struct ref *copy_ref(const struct ref *ref) { struct ref *cpy; size_t len; if (!ref) return NULL; len = st_add3(sizeof(struct ref), strlen(ref->name), 1); cpy = xmalloc(len); memcpy(cpy, ref, len); cpy->next = NULL; cpy->symref = xstrdup_or_null(ref->symref); cpy->remote_status = xstrdup_or_null(ref->remote_status); cpy->peer_ref = copy_ref(ref->peer_ref); return cpy; } struct ref *copy_ref_list(const struct ref *ref) { struct ref *ret = NULL; struct ref **tail = &ret; while (ref) { *tail = copy_ref(ref); ref = ref->next; tail = &((*tail)->next); } return ret; } static void free_ref(struct ref *ref) { if (!ref) return; free_ref(ref->peer_ref); free(ref->remote_status); free(ref->symref); free(ref); } void free_refs(struct ref *ref) { struct ref *next; while (ref) { next = ref->next; free_ref(ref); ref = next; } } int ref_compare_name(const void *va, const void *vb) { const struct ref *a = va, *b = vb; return strcmp(a->name, b->name); } static void *ref_list_get_next(const void *a) { return ((const struct ref *)a)->next; } static void ref_list_set_next(void *a, void *next) { ((struct ref *)a)->next = next; } void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *)) { *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp); } int count_refspec_match(const char *pattern, struct ref *refs, struct ref **matched_ref) { int patlen = strlen(pattern); struct ref *matched_weak = NULL; struct ref *matched = NULL; int weak_match = 0; int match = 0; for (weak_match = match = 0; refs; refs = refs->next) { char *name = refs->name; int namelen = strlen(name); if (!refname_match(pattern, name)) continue; /* A match is "weak" if it is with refs outside * heads or tags, and did not specify the pattern * in full (e.g. "refs/remotes/origin/master") or at * least from the toplevel (e.g. "remotes/origin/master"); * otherwise "git push $URL master" would result in * ambiguity between remotes/origin/master and heads/master * at the remote site. */ if (namelen != patlen && patlen != namelen - 5 && !starts_with(name, "refs/heads/") && !starts_with(name, "refs/tags/")) { /* We want to catch the case where only weak * matches are found and there are multiple * matches, and where more than one strong * matches are found, as ambiguous. One * strong match with zero or more weak matches * are acceptable as a unique match. */ matched_weak = refs; weak_match++; } else { matched = refs; match++; } } if (!matched) { if (matched_ref) *matched_ref = matched_weak; return weak_match; } else { if (matched_ref) *matched_ref = matched; return match; } } static void tail_link_ref(struct ref *ref, struct ref ***tail) { **tail = ref; while (ref->next) ref = ref->next; *tail = &ref->next; } static struct ref *alloc_delete_ref(void) { struct ref *ref = alloc_ref("(delete)"); oidclr(&ref->new_oid); return ref; } static int try_explicit_object_name(const char *name, struct ref **match) { struct object_id oid; if (!*name) { if (match) *match = alloc_delete_ref(); return 0; } if (get_oid(name, &oid)) return -1; if (match) { *match = alloc_ref(name); oidcpy(&(*match)->new_oid, &oid); } return 0; } static struct ref *make_linked_ref(const char *name, struct ref ***tail) { struct ref *ret = alloc_ref(name); tail_link_ref(ret, tail); return ret; } static char *guess_ref(const char *name, struct ref *peer) { struct strbuf buf = STRBUF_INIT; const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING, NULL, NULL); if (!r) return NULL; if (starts_with(r, "refs/heads/")) strbuf_addstr(&buf, "refs/heads/"); else if (starts_with(r, "refs/tags/")) strbuf_addstr(&buf, "refs/tags/"); else return NULL; strbuf_addstr(&buf, name); return strbuf_detach(&buf, NULL); } static int match_explicit_lhs(struct ref *src, struct refspec *rs, struct ref **match, int *allocated_match) { switch (count_refspec_match(rs->src, src, match)) { case 1: if (allocated_match) *allocated_match = 0; return 0; case 0: /* The source could be in the get_sha1() format * not a reference name. :refs/other is a * way to delete 'other' ref at the remote end. */ if (try_explicit_object_name(rs->src, match) < 0) return error("src refspec %s does not match any.", rs->src); if (allocated_match) *allocated_match = 1; return 0; default: return error("src refspec %s matches more than one.", rs->src); } } static int match_explicit(struct ref *src, struct ref *dst, struct ref ***dst_tail, struct refspec *rs) { struct ref *matched_src, *matched_dst; int allocated_src; const char *dst_value = rs->dst; char *dst_guess; if (rs->pattern || rs->matching) return 0; matched_src = matched_dst = NULL; if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0) return -1; if (!dst_value) { int flag; dst_value = resolve_ref_unsafe(matched_src->name, RESOLVE_REF_READING, NULL, &flag); if (!dst_value || ((flag & REF_ISSYMREF) && !starts_with(dst_value, "refs/heads/"))) die("%s cannot be resolved to branch.", matched_src->name); } switch (count_refspec_match(dst_value, dst, &matched_dst)) { case 1: break; case 0: if (starts_with(dst_value, "refs/")) matched_dst = make_linked_ref(dst_value, dst_tail); else if (is_null_oid(&matched_src->new_oid)) error("unable to delete '%s': remote ref does not exist", dst_value); else if ((dst_guess = guess_ref(dst_value, matched_src))) { matched_dst = make_linked_ref(dst_guess, dst_tail); free(dst_guess); } else error("unable to push to unqualified destination: %s\n" "The destination refspec neither matches an " "existing ref on the remote nor\n" "begins with refs/, and we are unable to " "guess a prefix based on the source ref.", dst_value); break; default: matched_dst = NULL; error("dst refspec %s matches more than one.", dst_value); break; } if (!matched_dst) return -1; if (matched_dst->peer_ref) return error("dst ref %s receives from more than one src.", matched_dst->name); else { matched_dst->peer_ref = allocated_src ? matched_src : copy_ref(matched_src); matched_dst->force = rs->force; } return 0; } static int match_explicit_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, struct refspec *rs, int rs_nr) { int i, errs; for (i = errs = 0; i < rs_nr; i++) errs += match_explicit(src, dst, dst_tail, &rs[i]); return errs; } static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref, int send_mirror, int direction, const struct refspec **ret_pat) { const struct refspec *pat; char *name; int i; int matching_refs = -1; for (i = 0; i < rs_nr; i++) { if (rs[i].matching && (matching_refs == -1 || rs[i].force)) { matching_refs = i; continue; } if (rs[i].pattern) { const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src; int match; if (direction == FROM_SRC) match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name); else match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name); if (match) { matching_refs = i; break; } } } if (matching_refs == -1) return NULL; pat = rs + matching_refs; if (pat->matching) { /* * "matching refs"; traditionally we pushed everything * including refs outside refs/heads/ hierarchy, but * that does not make much sense these days. */ if (!send_mirror && !starts_with(ref->name, "refs/heads/")) return NULL; name = xstrdup(ref->name); } if (ret_pat) *ret_pat = pat; return name; } static struct ref **tail_ref(struct ref **head) { struct ref **tail = head; while (*tail) tail = &((*tail)->next); return tail; } struct tips { struct commit **tip; int nr, alloc; }; static void add_to_tips(struct tips *tips, const struct object_id *oid) { struct commit *commit; if (is_null_oid(oid)) return; commit = lookup_commit_reference_gently(oid, 1); if (!commit || (commit->object.flags & TMP_MARK)) return; commit->object.flags |= TMP_MARK; ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc); tips->tip[tips->nr++] = commit; } static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail) { struct string_list dst_tag = STRING_LIST_INIT_NODUP; struct string_list src_tag = STRING_LIST_INIT_NODUP; struct string_list_item *item; struct ref *ref; struct tips sent_tips; /* * Collect everything we know they would have at the end of * this push, and collect all tags they have. */ memset(&sent_tips, 0, sizeof(sent_tips)); for (ref = *dst; ref; ref = ref->next) { if (ref->peer_ref && !is_null_oid(&ref->peer_ref->new_oid)) add_to_tips(&sent_tips, &ref->peer_ref->new_oid); else add_to_tips(&sent_tips, &ref->old_oid); if (starts_with(ref->name, "refs/tags/")) string_list_append(&dst_tag, ref->name); } clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK); string_list_sort(&dst_tag); /* Collect tags they do not have. */ for (ref = src; ref; ref = ref->next) { if (!starts_with(ref->name, "refs/tags/")) continue; /* not a tag */ if (string_list_has_string(&dst_tag, ref->name)) continue; /* they already have it */ if (sha1_object_info(ref->new_oid.hash, NULL) != OBJ_TAG) continue; /* be conservative */ item = string_list_append(&src_tag, ref->name); item->util = ref; } string_list_clear(&dst_tag, 0); /* * At this point, src_tag lists tags that are missing from * dst, and sent_tips lists the tips we are pushing or those * that we know they already have. An element in the src_tag * that is an ancestor of any of the sent_tips needs to be * sent to the other side. */ if (sent_tips.nr) { for_each_string_list_item(item, &src_tag) { struct ref *ref = item->util; struct ref *dst_ref; struct commit *commit; if (is_null_oid(&ref->new_oid)) continue; commit = lookup_commit_reference_gently(&ref->new_oid, 1); if (!commit) /* not pushing a commit, which is not an error */ continue; /* * Is this tag, which they do not have, reachable from * any of the commits we are sending? */ if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip)) continue; /* Add it in */ dst_ref = make_linked_ref(ref->name, dst_tail); oidcpy(&dst_ref->new_oid, &ref->new_oid); dst_ref->peer_ref = copy_ref(ref); } } string_list_clear(&src_tag, 0); free(sent_tips.tip); } struct ref *find_ref_by_name(const struct ref *list, const char *name) { for ( ; list; list = list->next) if (!strcmp(list->name, name)) return (struct ref *)list; return NULL; } static void prepare_ref_index(struct string_list *ref_index, struct ref *ref) { for ( ; ref; ref = ref->next) string_list_append_nodup(ref_index, ref->name)->util = ref; string_list_sort(ref_index); } /* * Given only the set of local refs, sanity-check the set of push * refspecs. We can't catch all errors that match_push_refs would, * but we can catch some errors early before even talking to the * remote side. */ int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names) { struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names); int ret = 0; int i; for (i = 0; i < nr_refspec; i++) { struct refspec *rs = refspec + i; if (rs->pattern || rs->matching) continue; ret |= match_explicit_lhs(src, rs, NULL, NULL); } free_refspec(nr_refspec, refspec); return ret; } /* * Given the set of refs the local repository has, the set of refs the * remote repository has, and the refspec used for push, determine * what remote refs we will update and with what value by setting * peer_ref (which object is being pushed) and force (if the push is * forced) in elements of "dst". The function may add new elements to * dst (e.g. pushing to a new branch, done in match_explicit_refs). */ int match_push_refs(struct ref *src, struct ref **dst, int nr_refspec, const char **refspec, int flags) { struct refspec *rs; int send_all = flags & MATCH_REFS_ALL; int send_mirror = flags & MATCH_REFS_MIRROR; int send_prune = flags & MATCH_REFS_PRUNE; int errs; static const char *default_refspec[] = { ":", NULL }; struct ref *ref, **dst_tail = tail_ref(dst); struct string_list dst_ref_index = STRING_LIST_INIT_NODUP; if (!nr_refspec) { nr_refspec = 1; refspec = default_refspec; } rs = parse_push_refspec(nr_refspec, (const char **) refspec); errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec); /* pick the remainder */ for (ref = src; ref; ref = ref->next) { struct string_list_item *dst_item; struct ref *dst_peer; const struct refspec *pat = NULL; char *dst_name; dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat); if (!dst_name) continue; if (!dst_ref_index.nr) prepare_ref_index(&dst_ref_index, *dst); dst_item = string_list_lookup(&dst_ref_index, dst_name); dst_peer = dst_item ? dst_item->util : NULL; if (dst_peer) { if (dst_peer->peer_ref) /* We're already sending something to this ref. */ goto free_name; } else { if (pat->matching && !(send_all || send_mirror)) /* * Remote doesn't have it, and we have no * explicit pattern, and we don't have * --all or --mirror. */ goto free_name; /* Create a new one and link it */ dst_peer = make_linked_ref(dst_name, &dst_tail); oidcpy(&dst_peer->new_oid, &ref->new_oid); string_list_insert(&dst_ref_index, dst_peer->name)->util = dst_peer; } dst_peer->peer_ref = copy_ref(ref); dst_peer->force = pat->force; free_name: free(dst_name); } string_list_clear(&dst_ref_index, 0); if (flags & MATCH_REFS_FOLLOW_TAGS) add_missing_tags(src, dst, &dst_tail); if (send_prune) { struct string_list src_ref_index = STRING_LIST_INIT_NODUP; /* check for missing refs on the remote */ for (ref = *dst; ref; ref = ref->next) { char *src_name; if (ref->peer_ref) /* We're already sending something to this ref. */ continue; src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL); if (src_name) { if (!src_ref_index.nr) prepare_ref_index(&src_ref_index, src); if (!string_list_has_string(&src_ref_index, src_name)) ref->peer_ref = alloc_delete_ref(); free(src_name); } } string_list_clear(&src_ref_index, 0); } if (errs) return -1; return 0; } void set_ref_status_for_push(struct ref *remote_refs, int send_mirror, int force_update) { struct ref *ref; for (ref = remote_refs; ref; ref = ref->next) { int force_ref_update = ref->force || force_update; int reject_reason = 0; if (ref->peer_ref) oidcpy(&ref->new_oid, &ref->peer_ref->new_oid); else if (!send_mirror) continue; ref->deletion = is_null_oid(&ref->new_oid); if (!ref->deletion && !oidcmp(&ref->old_oid, &ref->new_oid)) { ref->status = REF_STATUS_UPTODATE; continue; } /* * If the remote ref has moved and is now different * from what we expect, reject any push. * * It also is an error if the user told us to check * with the remote-tracking branch to find the value * to expect, but we did not have such a tracking * branch. */ if (ref->expect_old_sha1) { if (oidcmp(&ref->old_oid, &ref->old_oid_expect)) reject_reason = REF_STATUS_REJECT_STALE; else /* If the ref isn't stale then force the update. */ force_ref_update = 1; } /* * If the update isn't already rejected then check * the usual "must fast-forward" rules. * * Decide whether an individual refspec A:B can be * pushed. The push will succeed if any of the * following are true: * * (1) the remote reference B does not exist * * (2) the remote reference B is being removed (i.e., * pushing :B where no source is specified) * * (3) the destination is not under refs/tags/, and * if the old and new value is a commit, the new * is a descendant of the old. * * (4) it is forced using the +A:B notation, or by * passing the --force argument */ if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) { if (starts_with(ref->name, "refs/tags/")) reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS; else if (!has_object_file(&ref->old_oid)) reject_reason = REF_STATUS_REJECT_FETCH_FIRST; else if (!lookup_commit_reference_gently(&ref->old_oid, 1) || !lookup_commit_reference_gently(&ref->new_oid, 1)) reject_reason = REF_STATUS_REJECT_NEEDS_FORCE; else if (!ref_newer(&ref->new_oid, &ref->old_oid)) reject_reason = REF_STATUS_REJECT_NONFASTFORWARD; } /* * "--force" will defeat any rejection implemented * by the rules above. */ if (!force_ref_update) ref->status = reject_reason; else if (reject_reason) ref->forced_update = 1; } } static void set_merge(struct branch *ret) { struct remote *remote; char *ref; struct object_id oid; int i; if (!ret) return; /* no branch */ if (ret->merge) return; /* already run */ if (!ret->remote_name || !ret->merge_nr) { /* * no merge config; let's make sure we don't confuse callers * with a non-zero merge_nr but a NULL merge */ ret->merge_nr = 0; return; } remote = remote_get(ret->remote_name); ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge)); for (i = 0; i < ret->merge_nr; i++) { ret->merge[i] = xcalloc(1, sizeof(**ret->merge)); ret->merge[i]->src = xstrdup(ret->merge_name[i]); if (!remote_find_tracking(remote, ret->merge[i]) || strcmp(ret->remote_name, ".")) continue; if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]), &oid, &ref) == 1) ret->merge[i]->dst = ref; else ret->merge[i]->dst = xstrdup(ret->merge_name[i]); } } struct branch *branch_get(const char *name) { struct branch *ret; read_config(); if (!name || !*name || !strcmp(name, "HEAD")) ret = current_branch; else ret = make_branch(name, 0); set_merge(ret); return ret; } int branch_has_merge_config(struct branch *branch) { return branch && !!branch->merge; } int branch_merge_matches(struct branch *branch, int i, const char *refname) { if (!branch || i < 0 || i >= branch->merge_nr) return 0; return refname_match(branch->merge[i]->src, refname); } __attribute__((format (printf,2,3))) static const char *error_buf(struct strbuf *err, const char *fmt, ...) { if (err) { va_list ap; va_start(ap, fmt); strbuf_vaddf(err, fmt, ap); va_end(ap); } return NULL; } const char *branch_get_upstream(struct branch *branch, struct strbuf *err) { if (!branch) return error_buf(err, _("HEAD does not point to a branch")); if (!branch->merge || !branch->merge[0]) { /* * no merge config; is it because the user didn't define any, * or because it is not a real branch, and get_branch * auto-vivified it? */ if (!ref_exists(branch->refname)) return error_buf(err, _("no such branch: '%s'"), branch->name); return error_buf(err, _("no upstream configured for branch '%s'"), branch->name); } if (!branch->merge[0]->dst) return error_buf(err, _("upstream branch '%s' not stored as a remote-tracking branch"), branch->merge[0]->src); return branch->merge[0]->dst; } static const char *tracking_for_push_dest(struct remote *remote, const char *refname, struct strbuf *err) { char *ret; ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname); if (!ret) return error_buf(err, _("push destination '%s' on remote '%s' has no local tracking branch"), refname, remote->name); return ret; } static const char *branch_get_push_1(struct branch *branch, struct strbuf *err) { struct remote *remote; remote = remote_get(pushremote_for_branch(branch, NULL)); if (!remote) return error_buf(err, _("branch '%s' has no remote for pushing"), branch->name); if (remote->push_refspec_nr) { char *dst; const char *ret; dst = apply_refspecs(remote->push, remote->push_refspec_nr, branch->refname); if (!dst) return error_buf(err, _("push refspecs for '%s' do not include '%s'"), remote->name, branch->name); ret = tracking_for_push_dest(remote, dst, err); free(dst); return ret; } if (remote->mirror) return tracking_for_push_dest(remote, branch->refname, err); switch (push_default) { case PUSH_DEFAULT_NOTHING: return error_buf(err, _("push has no destination (push.default is 'nothing')")); case PUSH_DEFAULT_MATCHING: case PUSH_DEFAULT_CURRENT: return tracking_for_push_dest(remote, branch->refname, err); case PUSH_DEFAULT_UPSTREAM: return branch_get_upstream(branch, err); case PUSH_DEFAULT_UNSPECIFIED: case PUSH_DEFAULT_SIMPLE: { const char *up, *cur; up = branch_get_upstream(branch, err); if (!up) return NULL; cur = tracking_for_push_dest(remote, branch->refname, err); if (!cur) return NULL; if (strcmp(cur, up)) return error_buf(err, _("cannot resolve 'simple' push to a single destination")); return cur; } } die("BUG: unhandled push situation"); } const char *branch_get_push(struct branch *branch, struct strbuf *err) { if (!branch) return error_buf(err, _("HEAD does not point to a branch")); if (!branch->push_tracking_ref) branch->push_tracking_ref = branch_get_push_1(branch, err); return branch->push_tracking_ref; } static int ignore_symref_update(const char *refname) { int flag; if (!resolve_ref_unsafe(refname, 0, NULL, &flag)) return 0; /* non-existing refs are OK */ return (flag & REF_ISSYMREF); } /* * Create and return a list of (struct ref) consisting of copies of * each remote_ref that matches refspec. refspec must be a pattern. * Fill in the copies' peer_ref to describe the local tracking refs to * which they map. Omit any references that would map to an existing * local symbolic ref. */ static struct ref *get_expanded_map(const struct ref *remote_refs, const struct refspec *refspec) { const struct ref *ref; struct ref *ret = NULL; struct ref **tail = &ret; for (ref = remote_refs; ref; ref = ref->next) { char *expn_name = NULL; if (strchr(ref->name, '^')) continue; /* a dereference item */ if (match_name_with_pattern(refspec->src, ref->name, refspec->dst, &expn_name) && !ignore_symref_update(expn_name)) { struct ref *cpy = copy_ref(ref); cpy->peer_ref = alloc_ref(expn_name); if (refspec->force) cpy->peer_ref->force = 1; *tail = cpy; tail = &cpy->next; } free(expn_name); } return ret; } static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name) { const struct ref *ref; const struct ref *best_match = NULL; int best_score = 0; for (ref = refs; ref; ref = ref->next) { int score = refname_match(name, ref->name); if (best_score < score) { best_match = ref; best_score = score; } } return best_match; } struct ref *get_remote_ref(const struct ref *remote_refs, const char *name) { const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name); if (!ref) return NULL; return copy_ref(ref); } static struct ref *get_local_ref(const char *name) { if (!name || name[0] == '\0') return NULL; if (starts_with(name, "refs/")) return alloc_ref(name); if (starts_with(name, "heads/") || starts_with(name, "tags/") || starts_with(name, "remotes/")) return alloc_ref_with_prefix("refs/", 5, name); return alloc_ref_with_prefix("refs/heads/", 11, name); } int get_fetch_map(const struct ref *remote_refs, const struct refspec *refspec, struct ref ***tail, int missing_ok) { struct ref *ref_map, **rmp; if (refspec->pattern) { ref_map = get_expanded_map(remote_refs, refspec); } else { const char *name = refspec->src[0] ? refspec->src : "HEAD"; if (refspec->exact_sha1) { ref_map = alloc_ref(name); get_oid_hex(name, &ref_map->old_oid); } else { ref_map = get_remote_ref(remote_refs, name); } if (!missing_ok && !ref_map) die("Couldn't find remote ref %s", name); if (ref_map) { ref_map->peer_ref = get_local_ref(refspec->dst); if (ref_map->peer_ref && refspec->force) ref_map->peer_ref->force = 1; } } for (rmp = &ref_map; *rmp; ) { if ((*rmp)->peer_ref) { if (!starts_with((*rmp)->peer_ref->name, "refs/") || check_refname_format((*rmp)->peer_ref->name, 0)) { struct ref *ignore = *rmp; error("* Ignoring funny ref '%s' locally", (*rmp)->peer_ref->name); *rmp = (*rmp)->next; free(ignore->peer_ref); free(ignore); continue; } } rmp = &((*rmp)->next); } if (ref_map) tail_link_ref(ref_map, tail); return 0; } int resolve_remote_symref(struct ref *ref, struct ref *list) { if (!ref->symref) return 0; for (; list; list = list->next) if (!strcmp(ref->symref, list->name)) { oidcpy(&ref->old_oid, &list->old_oid); return 0; } return 1; } static void unmark_and_free(struct commit_list *list, unsigned int mark) { while (list) { struct commit *commit = pop_commit(&list); commit->object.flags &= ~mark; } } int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid) { struct object *o; struct commit *old_commit, *new_commit; struct commit_list *list, *used; int found = 0; /* * Both new_commit and old_commit must be commit-ish and new_commit is descendant of * old_commit. Otherwise we require --force. */ o = deref_tag(parse_object(old_oid), NULL, 0); if (!o || o->type != OBJ_COMMIT) return 0; old_commit = (struct commit *) o; o = deref_tag(parse_object(new_oid), NULL, 0); if (!o || o->type != OBJ_COMMIT) return 0; new_commit = (struct commit *) o; if (parse_commit(new_commit) < 0) return 0; used = list = NULL; commit_list_insert(new_commit, &list); while (list) { new_commit = pop_most_recent_commit(&list, TMP_MARK); commit_list_insert(new_commit, &used); if (new_commit == old_commit) { found = 1; break; } } unmark_and_free(list, TMP_MARK); unmark_and_free(used, TMP_MARK); return found; } /* * Lookup the upstream branch for the given branch and if present, optionally * compute the commit ahead/behind values for the pair. * * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the * counts in *num_ours and *num_theirs. If abf is AHEAD_BEHIND_QUICK, skip * the (potentially expensive) a/b computation (*num_ours and *num_theirs are * set to zero). * * The name of the upstream branch (or NULL if no upstream is defined) is * returned via *upstream_name, if it is not itself NULL. * * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no * upstream defined, or ref does not exist). Returns 0 if the commits are * identical. Returns 1 if commits are different. */ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs, const char **upstream_name, enum ahead_behind_flags abf) { struct object_id oid; struct commit *ours, *theirs; struct rev_info revs; const char *base; struct argv_array argv = ARGV_ARRAY_INIT; /* Cannot stat unless we are marked to build on top of somebody else. */ base = branch_get_upstream(branch, NULL); if (upstream_name) *upstream_name = base; if (!base) return -1; /* Cannot stat if what we used to build on no longer exists */ if (read_ref(base, &oid)) return -1; theirs = lookup_commit_reference(&oid); if (!theirs) return -1; if (read_ref(branch->refname, &oid)) return -1; ours = lookup_commit_reference(&oid); if (!ours) return -1; *num_theirs = *num_ours = 0; /* are we the same? */ if (theirs == ours) return 0; if (abf == AHEAD_BEHIND_QUICK) return 1; if (abf != AHEAD_BEHIND_FULL) BUG("stat_tracking_info: invalid abf '%d'", abf); /* Run "rev-list --left-right ours...theirs" internally... */ argv_array_push(&argv, ""); /* ignored */ argv_array_push(&argv, "--left-right"); argv_array_pushf(&argv, "%s...%s", oid_to_hex(&ours->object.oid), oid_to_hex(&theirs->object.oid)); argv_array_push(&argv, "--"); init_revisions(&revs, NULL); setup_revisions(argv.argc, argv.argv, &revs, NULL); if (prepare_revision_walk(&revs)) die("revision walk setup failed"); /* ... and count the commits on each side. */ while (1) { struct commit *c = get_revision(&revs); if (!c) break; if (c->object.flags & SYMMETRIC_LEFT) (*num_ours)++; else (*num_theirs)++; } /* clear object flags smudged by the above traversal */ clear_commit_marks(ours, ALL_REV_FLAGS); clear_commit_marks(theirs, ALL_REV_FLAGS); argv_array_clear(&argv); return 1; } /* * Return true when there is anything to report, otherwise false. */ int format_tracking_info(struct branch *branch, struct strbuf *sb, enum ahead_behind_flags abf) { int ours, theirs, sti; const char *full_base; char *base; int upstream_is_gone = 0; sti = stat_tracking_info(branch, &ours, &theirs, &full_base, abf); if (sti < 0) { if (!full_base) return 0; upstream_is_gone = 1; } base = shorten_unambiguous_ref(full_base, 0); if (upstream_is_gone) { strbuf_addf(sb, _("Your branch is based on '%s', but the upstream is gone.\n"), base); if (advice_status_hints) strbuf_addstr(sb, _(" (use \"git branch --unset-upstream\" to fixup)\n")); } else if (!sti) { strbuf_addf(sb, _("Your branch is up to date with '%s'.\n"), base); } else if (abf == AHEAD_BEHIND_QUICK) { strbuf_addf(sb, _("Your branch and '%s' refer to different commits.\n"), base); if (advice_status_hints) strbuf_addf(sb, _(" (use \"%s\" for details)\n"), "git status --ahead-behind"); } else if (!theirs) { strbuf_addf(sb, Q_("Your branch is ahead of '%s' by %d commit.\n", "Your branch is ahead of '%s' by %d commits.\n", ours), base, ours); if (advice_status_hints) strbuf_addstr(sb, _(" (use \"git push\" to publish your local commits)\n")); } else if (!ours) { strbuf_addf(sb, Q_("Your branch is behind '%s' by %d commit, " "and can be fast-forwarded.\n", "Your branch is behind '%s' by %d commits, " "and can be fast-forwarded.\n", theirs), base, theirs); if (advice_status_hints) strbuf_addstr(sb, _(" (use \"git pull\" to update your local branch)\n")); } else { strbuf_addf(sb, Q_("Your branch and '%s' have diverged,\n" "and have %d and %d different commit each, " "respectively.\n", "Your branch and '%s' have diverged,\n" "and have %d and %d different commits each, " "respectively.\n", ours + theirs), base, ours, theirs); if (advice_status_hints) strbuf_addstr(sb, _(" (use \"git pull\" to merge the remote branch into yours)\n")); } free(base); return 1; } static int one_local_ref(const char *refname, const struct object_id *oid, int flag, void *cb_data) { struct ref ***local_tail = cb_data; struct ref *ref; /* we already know it starts with refs/ to get here */ if (check_refname_format(refname + 5, 0)) return 0; ref = alloc_ref(refname); oidcpy(&ref->new_oid, oid); **local_tail = ref; *local_tail = &ref->next; return 0; } struct ref *get_local_heads(void) { struct ref *local_refs = NULL, **local_tail = &local_refs; for_each_ref(one_local_ref, &local_tail); return local_refs; } struct ref *guess_remote_head(const struct ref *head, const struct ref *refs, int all) { const struct ref *r; struct ref *list = NULL; struct ref **tail = &list; if (!head) return NULL; /* * Some transports support directly peeking at * where HEAD points; if that is the case, then * we don't have to guess. */ if (head->symref) return copy_ref(find_ref_by_name(refs, head->symref)); /* If refs/heads/master could be right, it is. */ if (!all) { r = find_ref_by_name(refs, "refs/heads/master"); if (r && !oidcmp(&r->old_oid, &head->old_oid)) return copy_ref(r); } /* Look for another ref that points there */ for (r = refs; r; r = r->next) { if (r != head && starts_with(r->name, "refs/heads/") && !oidcmp(&r->old_oid, &head->old_oid)) { *tail = copy_ref(r); tail = &((*tail)->next); if (!all) break; } } return list; } struct stale_heads_info { struct string_list *ref_names; struct ref **stale_refs_tail; struct refspec *refs; int ref_count; }; static int get_stale_heads_cb(const char *refname, const struct object_id *oid, int flags, void *cb_data) { struct stale_heads_info *info = cb_data; struct string_list matches = STRING_LIST_INIT_DUP; struct refspec query; int i, stale = 1; memset(&query, 0, sizeof(struct refspec)); query.dst = (char *)refname; query_refspecs_multiple(info->refs, info->ref_count, &query, &matches); if (matches.nr == 0) goto clean_exit; /* No matches */ /* * If we did find a suitable refspec and it's not a symref and * it's not in the list of refs that currently exist in that * remote, we consider it to be stale. In order to deal with * overlapping refspecs, we need to go over all of the * matching refs. */ if (flags & REF_ISSYMREF) goto clean_exit; for (i = 0; stale && i < matches.nr; i++) if (string_list_has_string(info->ref_names, matches.items[i].string)) stale = 0; if (stale) { struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail); oidcpy(&ref->new_oid, oid); } clean_exit: string_list_clear(&matches, 0); return 0; } struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map) { struct ref *ref, *stale_refs = NULL; struct string_list ref_names = STRING_LIST_INIT_NODUP; struct stale_heads_info info; info.ref_names = &ref_names; info.stale_refs_tail = &stale_refs; info.refs = refs; info.ref_count = ref_count; for (ref = fetch_map; ref; ref = ref->next) string_list_append(&ref_names, ref->name); string_list_sort(&ref_names); for_each_ref(get_stale_heads_cb, &info); string_list_clear(&ref_names, 0); return stale_refs; } /* * Compare-and-swap */ static void clear_cas_option(struct push_cas_option *cas) { int i; for (i = 0; i < cas->nr; i++) free(cas->entry[i].refname); free(cas->entry); memset(cas, 0, sizeof(*cas)); } static struct push_cas *add_cas_entry(struct push_cas_option *cas, const char *refname, size_t refnamelen) { struct push_cas *entry; ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc); entry = &cas->entry[cas->nr++]; memset(entry, 0, sizeof(*entry)); entry->refname = xmemdupz(refname, refnamelen); return entry; } static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset) { const char *colon; struct push_cas *entry; if (unset) { /* "--no-