filter out /./ in path.join and path.normalize

src/host/path_join.c

@@ -28,6 +28,12 @@ int path_join(lua_State* L)
 		part = luaL_checkstring(L, i);
 		len = strlen(part);
 
+		/* remove leading "./" */
+		while (strncmp(part, "./", 2) == 0) {
+			part += 2;
+			len -= 2;
+		}
+
 		/* remove trailing slashes */
 		while (len > 1 && part[len - 1] == '/') {
 			--len;

src/host/path_normalize.c

@@ -47,6 +47,15 @@ int path_normalize(lua_State* L)
 			}
 		}
 
+		/* filter out /./ */
+		if (ch == '/' && last == '.') {
+			ptr = dst - 2;
+			if (ptr >= buffer && ptr[0] == '/') {
+				dst = ptr;
+				continue;
+			}
+		}
+
 		/* add to the result, filtering out duplicate slashes */
 		if (ch != '/' || last != '/') {
 			*(dst++) = ch;

tests/base/test_path.lua

@@ -275,6 +275,10 @@
 		test.isequal("foo", path.join("p1/p2/p3", "../../../foo"))
 	end
 
+	function suite.join_ignoreLeadingDots()
+		test.isequal("p1/p2/foo", path.join("p1/p2", "././foo"))
+	end	
+
 	function suite.join_OnUptoParentOfBase()
 		test.isequal("../../p1", path.join("p1/p2/p3/p4/p5/p6/p7/", "../../../../../../../../../p1"))
 	end
@@ -429,6 +433,11 @@
 		test.isequal("..", p)
 	end
 
+	function suite.normalize_singleDot()
+		local p = path.normalize("../../generated/Protocol/External/BattlePay/./asterion.pb.cc")
+		test.isequal("../../generated/Protocol/External/BattlePay/asterion.pb.cc", p)
+	end
+
 	function suite.normalize()
 		test.isequal("d:/ProjectB/bin", path.normalize("d:/ProjectA/../ProjectB/bin"))
 		test.isequal("/ProjectB/bin", path.normalize("/ProjectA/../ProjectB/bin"))