diff options
Diffstat (limited to 'remote.c')
| -rw-r--r-- | remote.c | 1324 |
1 files changed, 1004 insertions, 320 deletions
@@ -6,11 +6,16 @@ #include "revision.h" #include "dir.h" #include "tag.h" +#include "string-list.h" +#include "mergesort.h" + +enum map_direction { FROM_SRC, FROM_DST }; static struct refspec s_tag_refspec = { 0, 1, 0, + 0, "refs/tags/*", "refs/tags/*" }; @@ -37,6 +42,7 @@ struct rewrites { 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; @@ -44,6 +50,8 @@ static int branches_nr; static struct branch *current_branch; static const char *default_remote_name; +static const char *branch_pushremote_name; +static const char *pushremote_name; static int explicit_default_remote_name; static struct rewrites rewrites; @@ -52,6 +60,11 @@ static struct rewrites rewrites_push; #define BUF_SIZE (2048) static char buffer[BUF_SIZE]; +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; @@ -65,7 +78,7 @@ static const char *alias_url(const char *url, struct rewrites *r) if (!r->rewrite[i]) continue; for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) { - if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) && + 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]); @@ -124,25 +137,51 @@ static void add_url_alias(struct remote *remote, const char *url) add_pushurl_alias(remote, url); } +struct remotes_hash_key { + const char *str; + int len; +}; + +static int remotes_hash_cmp(const struct remote *a, const struct remote *b, const struct remotes_hash_key *key) +{ + 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, (hashmap_cmp_fn)remotes_hash_cmp, 0); +} + static struct remote *make_remote(const char *name, int len) { - struct remote *ret; - int i; + struct remote *ret, *replaced; + struct remotes_hash_key lookup; + struct hashmap_entry lookup_entry; - for (i = 0; i < remotes_nr; i++) { - if (len ? (!strncmp(name, remotes[i]->name, len) && - !remotes[i]->name[len]) : - !strcmp(name, remotes[i]->name)) - return remotes[i]; - } + 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 */ ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc); remotes[remotes_nr++] = ret; - if (len) - ret->name = xstrndup(name, len); - else - ret->name = xstrdup(name); + 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; } @@ -157,7 +196,6 @@ static struct branch *make_branch(const char *name, int len) { struct branch *ret; int i; - char *refname; for (i = 0; i < branches_nr; i++) { if (len ? (!strncmp(name, branches[i]->name, len) && @@ -173,10 +211,7 @@ static struct branch *make_branch(const char *name, int len) ret->name = xstrndup(name, len); else ret->name = xstrdup(name); - refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1); - strcpy(refname, "refs/heads/"); - strcpy(refname + strlen("refs/heads/"), ret->name); - ret->refname = refname; + ret->refname = xstrfmt("refs/heads/%s", ret->name); return ret; } @@ -227,13 +262,13 @@ static void read_remotes_file(struct remote *remote) int value_list; char *s, *p; - if (!prefixcmp(buffer, "URL:")) { + if (starts_with(buffer, "URL:")) { value_list = 0; s = buffer + 4; - } else if (!prefixcmp(buffer, "Push:")) { + } else if (starts_with(buffer, "Push:")) { value_list = 1; s = buffer + 5; - } else if (!prefixcmp(buffer, "Pull:")) { + } else if (starts_with(buffer, "Pull:")) { value_list = 2; s = buffer + 5; } else @@ -265,10 +300,9 @@ static void read_remotes_file(struct remote *remote) static void read_branches_file(struct remote *remote) { - const char *slash = strchr(remote->name, '/'); char *frag; struct strbuf branch = STRBUF_INIT; - int n = slash ? slash - remote->name : 1000; + int n = 1000; FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r"); char *s, *p; int len; @@ -288,21 +322,11 @@ static void read_branches_file(struct remote *remote) while (isspace(p[-1])) *--p = 0; len = p - s; - if (slash) - len += strlen(slash); p = xmalloc(len + 1); strcpy(p, s); - if (slash) - strcat(p, slash); /* - * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when - * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from - * the partial URL obtained from the branches file plus - * "/netdev-2.6" and does not store it in any tracking ref. - * #branch specifier in the file is ignored. - * - * Otherwise, the branches file would have URL and optionally + * The branches file would have URL and optionally * #branch specified. The "master" (or specified) branch is * fetched and stored in the local branch of the same name. */ @@ -312,12 +336,8 @@ static void read_branches_file(struct remote *remote) strbuf_addf(&branch, "refs/heads/%s", frag); } else strbuf_addstr(&branch, "refs/heads/master"); - if (!slash) { - strbuf_addf(&branch, ":refs/heads/%s", remote->name); - } else { - strbuf_reset(&branch); - strbuf_addstr(&branch, "HEAD:"); - } + + strbuf_addf(&branch, ":refs/heads/%s", remote->name); add_url_alias(remote, p); add_fetch_refspec(remote, strbuf_detach(&branch, NULL)); /* @@ -340,20 +360,23 @@ static int handle_config(const char *key, const char *value, void *cb) const char *subkey; struct remote *remote; struct branch *branch; - if (!prefixcmp(key, "branch.")) { + if (starts_with(key, "branch.")) { name = key + 7; subkey = strrchr(name, '.'); if (!subkey) return 0; branch = make_branch(name, subkey - name); if (!strcmp(subkey, ".remote")) { - if (!value) - return config_error_nonbool(key); - branch->remote_name = xstrdup(value); + if (git_config_string(&branch->remote_name, key, value)) + return -1; if (branch == current_branch) { default_remote_name = branch->remote_name; explicit_default_remote_name = 1; } + } else if (!strcmp(subkey, ".pushremote")) { + if (branch == current_branch) + if (git_config_string(&branch_pushremote_name, key, value)) + return -1; } else if (!strcmp(subkey, ".merge")) { if (!value) return config_error_nonbool(key); @@ -361,7 +384,7 @@ static int handle_config(const char *key, const char *value, void *cb) } return 0; } - if (!prefixcmp(key, "url.")) { + if (starts_with(key, "url.")) { struct rewrite *rewrite; name = key + 4; subkey = strrchr(name, '.'); @@ -379,9 +402,16 @@ static int handle_config(const char *key, const char *value, void *cb) add_instead_of(rewrite, xstrdup(value)); } } - if (prefixcmp(key, "remote.")) + + if (!starts_with(key, "remote.")) return 0; name = key + 7; + + /* Handle remote.* variables */ + if (!strcmp(name, "pushdefault")) + return git_config_string(&pushremote_name, key, value); + + /* Handle remote.<name>.* variables */ if (*name == '/') { warning("Config remote shorthand cannot begin with '/': %s", name); @@ -396,7 +426,10 @@ static int handle_config(const char *key, const char *value, void *cb) 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, ".url")) { const char *v; if (git_config_string(&v, key, value)) @@ -436,9 +469,13 @@ static int handle_config(const char *key, const char *value, void *cb) } 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, ".vcs")) { + return git_config_string(&remote->foreign_vcs, key, value); } return 0; } @@ -467,38 +504,24 @@ static void read_config(void) unsigned char sha1[20]; const char *head_ref; int flag; - if (default_remote_name) // did this already + if (default_remote_name) /* did this already */ return; - default_remote_name = xstrdup("origin"); + default_remote_name = "origin"; current_branch = NULL; - head_ref = resolve_ref("HEAD", sha1, 0, &flag); + head_ref = resolve_ref_unsafe("HEAD", 0, sha1, &flag); if (head_ref && (flag & REF_ISSYMREF) && - !prefixcmp(head_ref, "refs/heads/")) { - current_branch = - make_branch(head_ref + strlen("refs/heads/"), 0); + skip_prefix(head_ref, "refs/heads/", &head_ref)) { + current_branch = make_branch(head_ref, 0); } git_config(handle_config, NULL); + if (branch_pushremote_name) { + free((char *)pushremote_name); + pushremote_name = branch_pushremote_name; + } alias_all_urls(); } /* - * We need to make sure the tracking branches are well formed, but a - * wildcard refspec in "struct refspec" must have a trailing slash. We - * temporarily drop the trailing '/' while calling check_ref_format(), - * and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL - * error return is Ok for a wildcard refspec. - */ -static int verify_refname(char *name, int is_glob) -{ - int result; - - result = check_ref_format(name); - if (is_glob && result == CHECK_REF_FORMAT_WILDCARD) - result = CHECK_REF_FORMAT_OK; - return result; -} - -/* * This function frees a refspec array. * Warning: code paths should be checked to ensure that the src * and dst pointers are always freeable pointers as well @@ -521,13 +544,13 @@ static void free_refspecs(struct refspec *refspec, int nr_refspec) static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify) { int i; - int st; - struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec); + 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; @@ -541,7 +564,7 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp /* * Before going on, special case ":" (or "+:") as a refspec - * for matching refs. + * for pushing matching refs. */ if (!fetch && rhs == lhs && rhs[1] == '\0') { rs[i].matching = 1; @@ -565,35 +588,29 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp rs[i].pattern = is_glob; rs[i].src = xstrndup(lhs, llen); + flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); if (fetch) { - /* - * LHS - * - empty is allowed; it means HEAD. - * - otherwise it must be a valid looking ref. - */ + unsigned char unused[40]; + + /* LHS */ if (!*rs[i].src) - ; /* empty is ok */ - else { - st = verify_refname(rs[i].src, is_glob); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) - goto invalid; - } - /* - * RHS - * - missing is ok, and is same as empty. - * - empty is ok; it means not to store. - * - otherwise it must be a valid looking ref. - */ - if (!rs[i].dst) { - ; /* ok */ - } else if (!*rs[i].dst) { - ; /* ok */ - } else { - st = verify_refname(rs[i].dst, is_glob); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) - goto invalid; - } + ; /* empty is ok; it means "HEAD" */ + else if (llen == 40 && !get_sha1_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 @@ -605,8 +622,7 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp if (!*rs[i].src) ; /* empty is ok */ else if (is_glob) { - st = verify_refname(rs[i].src, is_glob); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) + if (check_refname_format(rs[i].src, flags)) goto invalid; } else @@ -619,14 +635,12 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp * - otherwise it must be a valid looking ref. */ if (!rs[i].dst) { - st = verify_refname(rs[i].src, is_glob); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) + if (check_refname_format(rs[i].src, flags)) goto invalid; } else if (!*rs[i].dst) { goto invalid; } else { - st = verify_refname(rs[i].dst, is_glob); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) + if (check_refname_format(rs[i].dst, flags)) goto invalid; } } @@ -648,10 +662,9 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp int valid_fetch_refspec(const char *fetch_refspec_str) { - const char *fetch_refspec[] = { fetch_refspec_str }; struct refspec *refspec; - refspec = parse_refspec_internal(1, fetch_refspec, 1, 1); + refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1); free_refspecs(refspec, 1); return !!refspec; } @@ -666,6 +679,16 @@ static 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; + 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)) @@ -673,44 +696,63 @@ static int valid_remote_nick(const char *name) return !strchr(name, '/'); /* no slash */ } -struct remote *remote_get(const char *name) +static struct remote *remote_get_1(const char *name, const char *pushremote_name) { struct remote *ret; int name_given = 0; - read_config(); if (name) name_given = 1; else { - name = default_remote_name; - name_given = explicit_default_remote_name; + if (pushremote_name) { + name = pushremote_name; + name_given = 1; + } else { + name = default_remote_name; + name_given = explicit_default_remote_name; + } } ret = make_remote(name, 0); if (valid_remote_nick(name)) { - if (!ret->url) + if (!valid_remote(ret)) read_remotes_file(ret); - if (!ret->url) + if (!valid_remote(ret)) read_branches_file(ret); } - if (name_given && !ret->url) + if (name_given && !valid_remote(ret)) add_url_alias(ret, name); - if (!ret->url) + 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) +{ + read_config(); + return remote_get_1(name, NULL); +} + +struct remote *pushremote_get(const char *name) +{ + read_config(); + return remote_get_1(name, pushremote_name); +} + int remote_is_configured(const char *name) { - int i; + struct remotes_hash_key lookup; + struct hashmap_entry lookup_entry; read_config(); - for (i = 0; i < remotes_nr; i++) - if (!strcmp(name, remotes[i]->name)) - return 1; - return 0; + init_remotes_hash(); + lookup.str = name; + lookup.len = strlen(name); + hashmap_entry_init(&lookup_entry, memhash(name, lookup.len)); + + return hashmap_get(&remotes_hash, &lookup_entry, &lookup) != NULL; } int for_each_remote(each_remote_fn fn, void *priv) @@ -732,31 +774,66 @@ int for_each_remote(each_remote_fn fn, void *priv) return result; } -void ref_remove_duplicates(struct ref *ref_map) +static void handle_duplicate(struct ref *ref1, struct ref *ref2) { - struct ref **posn; - struct ref *next; - for (; ref_map; ref_map = ref_map->next) { - if (!ref_map->peer_ref) - continue; - posn = &ref_map->next; - while (*posn) { - if ((*posn)->peer_ref && - !strcmp((*posn)->peer_ref->name, - ref_map->peer_ref->name)) { - if (strcmp((*posn)->name, ref_map->name)) - die("%s tracks both %s and %s", - ref_map->peer_ref->name, - (*posn)->name, ref_map->name); - next = (*posn)->next; - free((*posn)->peer_ref); - free(*posn); - *posn = next; + 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 { - posn = &(*posn)->next; + *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) @@ -785,61 +862,94 @@ static int match_name_with_pattern(const char *key, const char *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, '*'); - size_t vlen; - size_t vsuffixlen; if (!vstar) die("Value '%s' of pattern has no '*'", value); - vlen = vstar - value; - vsuffixlen = strlen(vstar + 1); - *result = xmalloc(vlen + vsuffixlen + - strlen(name) - - klen - ksuffixlen + 1); - strncpy(*result, value, vlen); - strncpy(*result + vlen, - name + klen, namelen - klen - ksuffixlen); - strcpy(*result + vlen + namelen - klen - ksuffixlen, - vstar + 1); + 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; } -int remote_find_tracking(struct remote *remote, struct refspec *refspec) +static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results) { - int find_src = refspec->src == NULL; - char *needle, **result; 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 (find_src) { if (!refspec->dst) - return error("find_tracking: need either src or dst"); - needle = refspec->dst; - result = &refspec->src; - } else { - needle = refspec->src; - result = &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; - for (i = 0; i < remote->fetch_refspec_nr; i++) { - struct refspec *fetch = &remote->fetch[i]; - const char *key = find_src ? fetch->dst : fetch->src; - const char *value = find_src ? fetch->src : fetch->dst; - if (!fetch->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 (fetch->pattern) { + if (refspec->pattern) { if (match_name_with_pattern(key, needle, value, result)) { - refspec->force = fetch->force; + query->force = refspec->force; return 0; } } else if (!strcmp(needle, key)) { *result = xstrdup(value); - refspec->force = fetch->force; + 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) { @@ -855,7 +965,7 @@ struct ref *alloc_ref(const char *name) return alloc_ref_with_prefix("", 0, name); } -static struct ref *copy_ref(const struct ref *ref) +struct ref *copy_ref(const struct ref *ref) { struct ref *cpy; size_t len; @@ -865,8 +975,8 @@ static struct ref *copy_ref(const struct ref *ref) cpy = xmalloc(sizeof(struct ref) + len + 1); memcpy(cpy, ref, sizeof(struct ref) + len + 1); cpy->next = NULL; - cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL; - cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : 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; } @@ -903,9 +1013,30 @@ void free_refs(struct ref *ref) } } -static int count_refspec_match(const char *pattern, - struct ref *refs, - struct ref **matched_ref) +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; @@ -917,7 +1048,7 @@ static int count_refspec_match(const char *pattern, char *name = refs->name; int namelen = strlen(name); - if (!refname_match(pattern, name, ref_rev_parse_rules)) + if (!refname_match(pattern, name)) continue; /* A match is "weak" if it is with refs outside @@ -930,8 +1061,8 @@ static int count_refspec_match(const char *pattern, */ if (namelen != patlen && patlen != namelen - 5 && - prefixcmp(name, "refs/heads/") && - prefixcmp(name, "refs/tags/")) { + !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 @@ -948,11 +1079,13 @@ static int count_refspec_match(const char *pattern, } } if (!matched) { - *matched_ref = matched_weak; + if (matched_ref) + *matched_ref = matched_weak; return weak_match; } else { - *matched_ref = matched; + if (matched_ref) + *matched_ref = matched; return match; } } @@ -965,21 +1098,32 @@ static void tail_link_ref(struct ref *ref, struct ref ***tail) *tail = &ref->next; } -static struct ref *try_explicit_object_name(const char *name) +static struct ref *alloc_delete_ref(void) +{ + struct ref *ref = alloc_ref("(delete)"); + hashclr(ref->new_sha1); + return ref; +} + +static int try_explicit_object_name(const char *name, + struct ref **match) { unsigned char sha1[20]; - struct ref *ref; if (!*name) { - ref = alloc_ref("(delete)"); - hashclr(ref->new_sha1); - return ref; + if (match) + *match = alloc_delete_ref(); + return 0; } + if (get_sha1(name, sha1)) - return NULL; - ref = alloc_ref(name); - hashcpy(ref->new_sha1, sha1); - return ref; + return -1; + + if (match) { + *match = alloc_ref(name); + hashcpy((*match)->new_sha1, sha1); + } + return 0; } static struct ref *make_linked_ref(const char *name, struct ref ***tail) @@ -994,13 +1138,14 @@ static char *guess_ref(const char *name, struct ref *peer) struct strbuf buf = STRBUF_INIT; unsigned char sha1[20]; - const char *r = resolve_ref(peer->name, sha1, 1, NULL); + const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING, + sha1, NULL); if (!r) return NULL; - if (!prefixcmp(r, "refs/heads/")) + if (starts_with(r, "refs/heads/")) strbuf_addstr(&buf, "refs/heads/"); - else if (!prefixcmp(r, "refs/tags/")) + else if (starts_with(r, "refs/tags/")) strbuf_addstr(&buf, "refs/tags/"); else return NULL; @@ -1009,12 +1154,37 @@ static char *guess_ref(const char *name, struct ref *peer) 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 copy_src; + int allocated_src; const char *dst_value = rs->dst; char *dst_guess; @@ -1023,32 +1193,19 @@ static int match_explicit(struct ref *src, struct ref *dst, return 0; matched_src = matched_dst = NULL; - switch (count_refspec_match(rs->src, src, &matched_src)) { - case 1: - copy_src = 1; - break; - 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. - */ - matched_src = try_explicit_object_name(rs->src); - if (!matched_src) - return error("src refspec %s does not match any.", rs->src); - copy_src = 0; - break; - default: - return error("src refspec %s matches more than one.", rs->src); - } + if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0) + return -1; if (!dst_value) { unsigned char sha1[20]; int flag; - dst_value = resolve_ref(matched_src->name, sha1, 1, &flag); + dst_value = resolve_ref_unsafe(matched_src->name, + RESOLVE_REF_READING, + sha1, &flag); if (!dst_value || ((flag & REF_ISSYMREF) && - prefixcmp(dst_value, "refs/heads/"))) + !starts_with(dst_value, "refs/heads/"))) die("%s cannot be resolved to branch.", matched_src->name); } @@ -1057,8 +1214,11 @@ static int match_explicit(struct ref *src, struct ref *dst, case 1: break; case 0: - if (!memcmp(dst_value, "refs/", 5)) + if (starts_with(dst_value, "refs/")) matched_dst = make_linked_ref(dst_value, dst_tail); + else if (is_null_sha1(matched_src->new_sha1)) + 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); else @@ -1081,7 +1241,9 @@ static int match_explicit(struct ref *src, struct ref *dst, return error("dst ref %s receives from more than one src.", matched_dst->name); else { - matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src; + matched_dst->peer_ref = allocated_src ? + matched_src : + copy_ref(matched_src); matched_dst->force = rs->force; } return 0; @@ -1097,10 +1259,11 @@ static int match_explicit_refs(struct ref *src, struct ref *dst, return errs; } -static const struct refspec *check_pattern_match(const struct refspec *rs, - int rs_nr, - const struct ref *src) +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++) { @@ -1110,14 +1273,36 @@ static const struct refspec *check_pattern_match(const struct refspec *rs, continue; } - if (rs[i].pattern && match_name_with_pattern(rs[i].src, src->name, - NULL, NULL)) - return rs + i; + 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 rs + matching_refs; - else + 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) @@ -1128,20 +1313,161 @@ static struct ref **tail_ref(struct ref **head) return tail; } +struct tips { + struct commit **tip; + int nr, alloc; +}; + +static void add_to_tips(struct tips *tips, const unsigned char *sha1) +{ + struct commit *commit; + + if (is_null_sha1(sha1)) + return; + commit = lookup_commit_reference_gently(sha1, 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_sha1(ref->peer_ref->new_sha1)) + add_to_tips(&sent_tips, ref->peer_ref->new_sha1); + else + add_to_tips(&sent_tips, ref->old_sha1); + 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_sha1, 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_sha1(ref->new_sha1)) + continue; + commit = lookup_commit_reference_gently(ref->new_sha1, 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); + hashcpy(dst_ref->new_sha1, ref->new_sha1); + 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); +} + /* - * Note. This is used only by "push"; refspec matching rules for - * push and fetch are subtly different, so do not try to reuse it - * without thinking. + * 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 match_refs(struct ref *src, struct ref **dst, - int nr_refspec, const char **refspec, int flags) +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 **dst_tail = tail_ref(dst); + struct ref *ref, **dst_tail = tail_ref(dst); + struct string_list dst_ref_index = STRING_LIST_INIT_NODUP; if (!nr_refspec) { nr_refspec = 1; @@ -1151,62 +1477,181 @@ int match_refs(struct ref *src, struct ref **dst, errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec); /* pick the remainder */ - for ( ; src; src = src->next) { + 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; - if (src->peer_ref) - continue; - pat = check_pattern_match(rs, nr_refspec, src); - if (!pat) + dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat); + if (!dst_name) continue; - 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 && prefixcmp(src->name, "refs/heads/")) - continue; - dst_name = xstrdup(src->name); + if (!dst_ref_index.nr) + prepare_ref_index(&dst_ref_index, *dst); - } else { - const char *dst_side = pat->dst ? pat->dst : pat->src; - if (!match_name_with_pattern(pat->src, src->name, - dst_side, &dst_name)) - die("Didn't think it matches any more"); - } - dst_peer = find_ref_by_name(*dst, dst_name); + 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 nor --mirror. + * --all or --mirror. */ goto free_name; /* Create a new one and link it */ dst_peer = make_linked_ref(dst_name, &dst_tail); - hashcpy(dst_peer->new_sha1, src->new_sha1); + hashcpy(dst_peer->new_sha1, ref->new_sha1); + string_list_insert(&dst_ref_index, + dst_peer->name)->util = dst_peer; } - dst_peer->peer_ref = copy_ref(src); + 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) + hashcpy(ref->new_sha1, ref->peer_ref->new_sha1); + else if (!send_mirror) + continue; + + ref->deletion = is_null_sha1(ref->new_sha1); + if (!ref->deletion && + !hashcmp(ref->old_sha1, ref->new_sha1)) { + ref->status = REF_STATUS_UPTODATE; + continue; + } + + /* + * Bypass the usual "must fast-forward" check but + * replace it with a weaker "the old value must be + * this value we observed". 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 (ref->expect_old_no_trackback || + hashcmp(ref->old_sha1, ref->old_sha1_expect)) + reject_reason = REF_STATUS_REJECT_STALE; + } + + /* + * 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 + */ + + else if (!ref->deletion && !is_null_sha1(ref->old_sha1)) { + if (starts_with(ref->name, "refs/tags/")) + reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS; + else if (!has_sha1_file(ref->old_sha1)) + reject_reason = REF_STATUS_REJECT_FETCH_FIRST; + else if (!lookup_commit_reference_gently(ref->old_sha1, 1) || + !lookup_commit_reference_gently(ref->new_sha1, 1)) + reject_reason = REF_STATUS_REJECT_NEEDS_FORCE; + else if (!ref_newer(ref->new_sha1, ref->old_sha1)) + 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) +{ + char *ref; + unsigned char sha1[20]; + int i; + + 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(ret->remote, ret->merge[i]) || + strcmp(ret->remote_name, ".")) + continue; + if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]), + sha1, &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; @@ -1218,18 +1663,8 @@ struct branch *branch_get(const char *name) ret = make_branch(name, 0); if (ret && ret->remote_name) { ret->remote = remote_get(ret->remote_name); - if (ret->merge_nr) { - int i; - ret->merge = xcalloc(sizeof(*ret->merge), - ret->merge_nr); - 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(ret->remote, ret->merge[i]) - && !strcmp(ret->remote_name, ".")) - ret->merge[i]->dst = xstrdup(ret->merge_name[i]); - } - } + if (ret->merge_nr) + set_merge(ret); } return ret; } @@ -1245,9 +1680,26 @@ int branch_merge_matches(struct branch *branch, { if (!branch || i < 0 || i >= branch->merge_nr) return 0; - return refname_match(branch->merge[i]->src, refname, ref_fetch_rules); + return refname_match(branch->merge[i]->src, refname); +} + +static int ignore_symref_update(const char *refname) +{ + unsigned char sha1[20]; + int flag; + + if (!resolve_ref_unsafe(refname, 0, sha1, &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) { @@ -1255,22 +1707,23 @@ static struct ref *get_expanded_map(const struct ref *remote_refs, struct ref *ret = NULL; struct ref **tail = &ret; - char *expn_name; - 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)) { + refspec->dst, &expn_name) && + !ignore_symref_update(expn_name)) { struct ref *cpy = copy_ref(ref); cpy->peer_ref = alloc_ref(expn_name); - free(expn_name); if (refspec->force) cpy->peer_ref->force = 1; *tail = cpy; tail = &cpy->next; } + free(expn_name); } return ret; @@ -1280,7 +1733,7 @@ static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const c { const struct ref *ref; for (ref = refs; ref; ref = ref->next) { - if (refname_match(name, ref->name, ref_fetch_rules)) + if (refname_match(name, ref->name)) return ref; } return NULL; @@ -1301,12 +1754,12 @@ static struct ref *get_local_ref(const char *name) if (!name || name[0] == '\0') return NULL; - if (!prefixcmp(name, "refs/")) + if (starts_with(name, "refs/")) return alloc_ref(name); - if (!prefixcmp(name, "heads/") || - !prefixcmp(name, "tags/") || - !prefixcmp(name, "remotes/")) + 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); @@ -1324,7 +1777,12 @@ int get_fetch_map(const struct ref *remote_refs, } else { const char *name = refspec->src[0] ? refspec->src : "HEAD"; - ref_map = get_remote_ref(remote_refs, name); + if (refspec->exact_sha1) { + ref_map = alloc_ref(name); + get_sha1_hex(name, ref_map->old_sha1); + } 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) { @@ -1336,8 +1794,8 @@ int get_fetch_map(const struct ref *remote_refs, for (rmp = &ref_map; *rmp; ) { if ((*rmp)->peer_ref) { - int st = check_ref_format((*rmp)->peer_ref->name + 5); - if (st && st != CHECK_REF_FORMAT_ONELEVEL) { + 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); @@ -1385,7 +1843,8 @@ int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) struct commit_list *list, *used; int found = 0; - /* Both new and old must be commit-ish and new is descendant of + /* + * Both new and old must be commit-ish and new is descendant of * old. Otherwise we require --force. */ o = deref_tag(parse_object(old_sha1), NULL, 0); @@ -1417,7 +1876,11 @@ int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) } /* - * Return true if there is anything to report, otherwise false. + * Compare a branch with its upstream, and save their differences (number + * of commits) in *num_ours and *num_theirs. + * + * Return 0 if branch has no upstream (no base), -1 if upstream is missing + * (with "gone" base), otherwise 1 (with base). */ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) { @@ -1428,34 +1891,30 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) const char *rev_argv[10], *base; int rev_argc; - /* - * Nothing to report unless we are marked to build on top of - * somebody else. - */ + /* Cannot stat unless we are marked to build on top of somebody else. */ if (!branch || !branch->merge || !branch->merge[0] || !branch->merge[0]->dst) return 0; - /* - * If what we used to build on no longer exists, there is - * nothing to report. - */ + /* Cannot stat if what we used to build on no longer exists */ base = branch->merge[0]->dst; - if (!resolve_ref(base, sha1, 1, NULL)) - return 0; + if (read_ref(base, sha1)) + return -1; theirs = lookup_commit_reference(sha1); if (!theirs) - return 0; + return -1; - if (!resolve_ref(branch->refname, sha1, 1, NULL)) - return 0; + if (read_ref(branch->refname, sha1)) + return -1; ours = lookup_commit_reference(sha1); if (!ours) - return 0; + return -1; /* are we the same? */ - if (theirs == ours) - return 0; + if (theirs == ours) { + *num_theirs = *num_ours = 0; + return 1; + } /* Run "rev-list --left-right ours...theirs" internally... */ rev_argc = 0; @@ -1471,7 +1930,8 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) init_revisions(&revs, NULL); setup_revisions(rev_argc, rev_argv, &revs, NULL); - prepare_revision_walk(&revs); + if (prepare_revision_walk(&revs)) + die("revision walk setup failed"); /* ... and count the commits on each side. */ *num_ours = 0; @@ -1497,28 +1957,70 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) */ int format_tracking_info(struct branch *branch, struct strbuf *sb) { - int num_ours, num_theirs; - const char *base; + int ours, theirs; + char *base; + int upstream_is_gone = 0; - if (!stat_tracking_info(branch, &num_ours, &num_theirs)) + switch (stat_tracking_info(branch, &ours, &theirs)) { + case 0: + /* no base */ return 0; + case -1: + /* with "gone" base */ + upstream_is_gone = 1; + break; + default: + /* with base */ + break; + } - base = branch->merge[0]->dst; - base = shorten_unambiguous_ref(base, 0); - if (!num_theirs) - strbuf_addf(sb, "Your branch is ahead of '%s' " - "by %d commit%s.\n", - base, num_ours, (num_ours == 1) ? "" : "s"); - else if (!num_ours) - strbuf_addf(sb, "Your branch is behind '%s' " - "by %d commit%s, " - "and can be fast-forwarded.\n", - base, num_theirs, (num_theirs == 1) ? "" : "s"); - else - strbuf_addf(sb, "Your branch and '%s' have diverged,\n" - "and have %d and %d different commit(s) each, " - "respectively.\n", - base, num_ours, num_theirs); + base = shorten_unambiguous_ref(branch->merge[0]->dst, 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_addf(sb, + _(" (use \"git branch --unset-upstream\" to fixup)\n")); + } else if (!ours && !theirs) { + strbuf_addf(sb, + _("Your branch is up-to-date with '%s'.\n"), + base); + } 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_addf(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_addf(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", + theirs), + base, ours, theirs); + if (advice_status_hints) + strbuf_addf(sb, + _(" (use \"git pull\" to merge the remote branch into yours)\n")); + } + free(base); return 1; } @@ -1529,7 +2031,7 @@ static int one_local_ref(const char *refname, const unsigned char *sha1, int fla int len; /* we already know it starts with refs/ to get here */ - if (check_ref_format(refname + 5)) + if (check_refname_format(refname + 5, 0)) return 0; len = strlen(refname) + 1; @@ -1576,7 +2078,9 @@ struct ref *guess_remote_head(const struct ref *head, /* Look for another ref that points there */ for (r = refs; r; r = r->next) { - if (r != head && !hashcmp(r->old_sha1, head->old_sha1)) { + if (r != head && + starts_with(r->name, "refs/heads/") && + !hashcmp(r->old_sha1, head->old_sha1)) { *tail = copy_ref(r); tail = &((*tail)->next); if (!all) @@ -1586,3 +2090,183 @@ struct ref *guess_remote_head(const struct ref *head, 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 unsigned char *sha1, 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); + hashcpy(ref->new_sha1, sha1); + } + +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; +} + +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-<option>" */ + clear_cas_option(cas); + return 0; + } + + if (!arg) { + /* just "--<option>" */ + cas->use_tracking_for_rest = 1; + return 0; + } + + /* "--<option>=refname" or "--<option>=refname:value" */ + colon = strchrnul(arg, ':'); + entry = add_cas_entry(cas, arg, colon - arg); + if (!*colon) + entry->use_tracking = 1; + else if (get_sha1(colon + 1, entry->expect)) + return error("cannot parse expected object name '%s'", colon + 1); + return 0; +} + +int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset) +{ + return parse_push_cas_option(opt->value, arg, unset); +} + +int is_empty_cas(const struct push_cas_option *cas) +{ + return !cas->use_tracking_for_rest && !cas->nr; +} + +/* + * Look at remote.fetch refspec and see if we have a remote + * tracking branch for the refname there. Fill its current + * value in sha1[]. + * If we cannot do so, return negative to signal an error. + */ +static int remote_tracking(struct remote *remote, const char *refname, + unsigned char sha1[20]) +{ + char *dst; + + dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname); + if (!dst) + return -1; /* no tracking ref for refname at remote */ + if (read_ref(dst, sha1)) + return -1; /* we know what the tracking ref is but we cannot read it */ + return 0; +} + +static void apply_cas(struct push_cas_option *cas, + struct remote *remote, + struct ref *ref) +{ + int i; + + /* Find an explicit --<option>=<name>[:<value>] entry */ + for (i = 0; i < cas->nr; i++) { + struct push_cas *entry = &cas->entry[i]; + if (!refname_match(entry->refname, ref->name)) + continue; + ref->expect_old_sha1 = 1; + if (!entry->use_tracking) + hashcpy(ref->old_sha1_expect, cas->entry[i].expect); + else if (remote_tracking(remote, ref->name, ref->old_sha1_expect)) + ref->expect_old_no_trackback = 1; + return; + } + + /* Are we using "--<option>" to cover all? */ + if (!cas->use_tracking_for_rest) + return; + + ref->expect_old_sha1 = 1; + if (remote_tracking(remote, ref->name, ref->old_sha1_expect)) + ref->expect_old_no_trackback = 1; +} + +void apply_push_cas(struct push_cas_option *cas, + struct remote *remote, + struct ref *remote_refs) +{ + struct ref *ref; + for (ref = remote_refs; ref; ref = ref->next) + apply_cas(cas, remote, ref); +} |