refspec: move refspec parsing logic into its own file

In preparation for performing a refactor on refspec related code, move
the refspec parsing logic into its own file.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 164 deletions

diff --git a/remote.c b/remote.c
index 91eb010ca9..4d67c061a0 100644
--- a/remote.c
+++ b/remote.c
@@ -2,6 +2,7 @@
 #include "config.h"
 #include "remote.h"
 #include "refs.h"
+#include "refspec.h"
 #include "commit.h"
 #include "diff.h"
 #include "revision.h"
@@ -13,18 +14,6 @@
 
 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;
@@ -499,158 +488,6 @@ static void read_config(void)
 	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))