diff options
Diffstat (limited to 'third_party/git/refspec.c')
| -rw-r--r-- | third_party/git/refspec.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/third_party/git/refspec.c b/third_party/git/refspec.c new file mode 100644 index 000000000000..9a9bf21934af --- /dev/null +++ b/third_party/git/refspec.c @@ -0,0 +1,232 @@ +#include "cache.h" +#include "argv-array.h" +#include "refs.h" +#include "refspec.h" + +static struct refspec_item s_tag_refspec = { + 0, + 1, + 0, + 0, + "refs/tags/*", + "refs/tags/*" +}; + +/* See TAG_REFSPEC for the string version */ +const struct refspec_item *tag_refspec = &s_tag_refspec; + +/* + * 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++; + } + + rhs = strrchr(lhs, ':'); + + /* + * 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 && fetch)) + return 0; + is_glob = 1; + } else if (rhs && is_glob) { + return 0; + } + + item->pattern = is_glob; + item->src = xstrndup(lhs, llen); + flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); + + 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; +} + +void refspec_append(struct refspec *rs, const 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++] = xstrdup(refspec); +} + +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((char *)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; +} + +void refspec_ref_prefixes(const struct refspec *rs, + struct argv_array *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) + 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) { + if (item->pattern) { + const char *glob = strchr(prefix, '*'); + argv_array_pushf(ref_prefixes, "%.*s", + (int)(glob - prefix), + prefix); + } else { + expand_ref_prefix(ref_prefixes, prefix); + } + } + } +} |