| #define USE_THE_REPOSITORY_VARIABLE |
| |
| #include "git-compat-util.h" |
| #include "gettext.h" |
| #include "hash.h" |
| #include "hex.h" |
| #include "strvec.h" |
| #include "refs.h" |
| #include "refspec.h" |
| #include "strbuf.h" |
| |
| /* |
| * Parses the provided refspec 'refspec' and populates the refspec_item 'item'. |
| * Returns 1 if successful and 0 if the refspec is invalid. |
| */ |
| static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch) |
| { |
| size_t llen; |
| int is_glob; |
| const char *lhs, *rhs; |
| int flags; |
| |
| is_glob = 0; |
| |
| lhs = refspec; |
| if (*lhs == '+') { |
| item->force = 1; |
| lhs++; |
| } else if (*lhs == '^') { |
| item->negative = 1; |
| lhs++; |
| } |
| |
| rhs = strrchr(lhs, ':'); |
| |
| /* negative refspecs only have one side */ |
| if (item->negative && rhs) |
| return 0; |
| |
| /* |
| * Before going on, special case ":" (or "+:") as a refspec |
| * for pushing matching refs. |
| */ |
| if (!fetch && rhs == lhs && rhs[1] == '\0') { |
| item->matching = 1; |
| return 1; |
| } |
| |
| if (rhs) { |
| size_t rlen = strlen(++rhs); |
| is_glob = (1 <= rlen && strchr(rhs, '*')); |
| item->dst = xstrndup(rhs, rlen); |
| } else { |
| item->dst = NULL; |
| } |
| |
| llen = (rhs ? (rhs - lhs - 1) : strlen(lhs)); |
| if (1 <= llen && memchr(lhs, '*', llen)) { |
| if ((rhs && !is_glob) || (!rhs && !item->negative && fetch)) |
| return 0; |
| is_glob = 1; |
| } else if (rhs && is_glob) { |
| return 0; |
| } |
| |
| item->pattern = is_glob; |
| if (llen == 1 && *lhs == '@') |
| item->src = xstrdup("HEAD"); |
| else |
| item->src = xstrndup(lhs, llen); |
| flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); |
| |
| if (item->negative) { |
| struct object_id unused; |
| |
| /* |
| * Negative refspecs only have a LHS, which indicates a ref |
| * (or pattern of refs) to exclude from other matches. This |
| * can either be a simple ref, or a glob pattern. Exact sha1 |
| * match is not currently supported. |
| */ |
| if (!*item->src) |
| return 0; /* negative refspecs must not be empty */ |
| else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused)) |
| return 0; /* negative refpsecs cannot be exact sha1 */ |
| else if (!check_refname_format(item->src, flags)) |
| ; /* valid looking ref is ok */ |
| else |
| return 0; |
| |
| /* the other rules below do not apply to negative refspecs */ |
| return 1; |
| } |
| |
| if (fetch) { |
| struct object_id unused; |
| |
| /* LHS */ |
| if (!*item->src) |
| ; /* empty is ok; it means "HEAD" */ |
| else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused)) |
| item->exact_sha1 = 1; /* ok */ |
| else if (!check_refname_format(item->src, flags)) |
| ; /* valid looking ref is ok */ |
| else |
| return 0; |
| /* RHS */ |
| if (!item->dst) |
| ; /* missing is ok; it is the same as empty */ |
| else if (!*item->dst) |
| ; /* empty is ok; it means "do not store" */ |
| else if (!check_refname_format(item->dst, flags)) |
| ; /* valid looking ref is ok */ |
| else |
| return 0; |
| } 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 (!*item->src) |
| ; /* empty is ok */ |
| else if (is_glob) { |
| if (check_refname_format(item->src, flags)) |
| return 0; |
| } |
| 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 (!item->dst) { |
| if (check_refname_format(item->src, flags)) |
| return 0; |
| } else if (!*item->dst) { |
| return 0; |
| } else { |
| if (check_refname_format(item->dst, flags)) |
| return 0; |
| } |
| } |
| |
| return 1; |
| } |
| |
| int refspec_item_init(struct refspec_item *item, const char *refspec, int fetch) |
| { |
| memset(item, 0, sizeof(*item)); |
| return parse_refspec(item, refspec, fetch); |
| } |
| |
| void refspec_item_init_or_die(struct refspec_item *item, const char *refspec, |
| int fetch) |
| { |
| if (!refspec_item_init(item, refspec, fetch)) |
| die(_("invalid refspec '%s'"), refspec); |
| } |
| |
| void refspec_item_clear(struct refspec_item *item) |
| { |
| FREE_AND_NULL(item->src); |
| FREE_AND_NULL(item->dst); |
| item->force = 0; |
| item->pattern = 0; |
| item->matching = 0; |
| item->exact_sha1 = 0; |
| } |
| |
| void refspec_init(struct refspec *rs, int fetch) |
| { |
| memset(rs, 0, sizeof(*rs)); |
| rs->fetch = fetch; |
| } |
| |
| static void refspec_append_nodup(struct refspec *rs, char *refspec) |
| { |
| struct refspec_item item; |
| |
| refspec_item_init_or_die(&item, refspec, rs->fetch); |
| |
| ALLOC_GROW(rs->items, rs->nr + 1, rs->alloc); |
| rs->items[rs->nr++] = item; |
| |
| ALLOC_GROW(rs->raw, rs->raw_nr + 1, rs->raw_alloc); |
| rs->raw[rs->raw_nr++] = refspec; |
| } |
| |
| void refspec_append(struct refspec *rs, const char *refspec) |
| { |
| refspec_append_nodup(rs, xstrdup(refspec)); |
| } |
| |
| void refspec_appendf(struct refspec *rs, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| refspec_append_nodup(rs, xstrvfmt(fmt, ap)); |
| va_end(ap); |
| } |
| |
| void refspec_appendn(struct refspec *rs, const char **refspecs, int nr) |
| { |
| int i; |
| for (i = 0; i < nr; i++) |
| refspec_append(rs, refspecs[i]); |
| } |
| |
| void refspec_clear(struct refspec *rs) |
| { |
| int i; |
| |
| for (i = 0; i < rs->nr; i++) |
| refspec_item_clear(&rs->items[i]); |
| |
| FREE_AND_NULL(rs->items); |
| rs->alloc = 0; |
| rs->nr = 0; |
| |
| for (i = 0; i < rs->raw_nr; i++) |
| free(rs->raw[i]); |
| FREE_AND_NULL(rs->raw); |
| rs->raw_alloc = 0; |
| rs->raw_nr = 0; |
| |
| rs->fetch = 0; |
| } |
| |
| int valid_fetch_refspec(const char *fetch_refspec_str) |
| { |
| struct refspec_item refspec; |
| int ret = refspec_item_init(&refspec, fetch_refspec_str, REFSPEC_FETCH); |
| refspec_item_clear(&refspec); |
| return ret; |
| } |
| |
| int valid_remote_name(const char *name) |
| { |
| int result; |
| struct strbuf refspec = STRBUF_INIT; |
| strbuf_addf(&refspec, "refs/heads/test:refs/remotes/%s/test", name); |
| result = valid_fetch_refspec(refspec.buf); |
| strbuf_release(&refspec); |
| return result; |
| } |
| |
| void refspec_ref_prefixes(const struct refspec *rs, |
| struct strvec *ref_prefixes) |
| { |
| int i; |
| for (i = 0; i < rs->nr; i++) { |
| const struct refspec_item *item = &rs->items[i]; |
| const char *prefix = NULL; |
| |
| if (item->exact_sha1 || item->negative) |
| continue; |
| if (rs->fetch == REFSPEC_FETCH) |
| prefix = item->src; |
| else if (item->dst) |
| prefix = item->dst; |
| else if (item->src && !item->exact_sha1) |
| prefix = item->src; |
| |
| if (!prefix) |
| continue; |
| |
| if (item->pattern) { |
| const char *glob = strchr(prefix, '*'); |
| strvec_pushf(ref_prefixes, "%.*s", |
| (int)(glob - prefix), |
| prefix); |
| } else { |
| expand_ref_prefix(ref_prefixes, prefix); |
| } |
| } |
| } |