Fix RegEx to parse cname as platform_element correctly

Signed-off-by: Tobias Wolf <[email protected]>

Author: NotTheEvilOne

src/gardenlinux/features/__main__.py

@@ -49,7 +49,7 @@ def main():
 
     if args.cname:
         re_match = re.match(
-            "([a-zA-Z0-9]+(-[a-zA-Z0-9\\_\\-]*?)?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
+            "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)+?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
             args.cname
         )
 

src/gardenlinux/features/cname_main.py

@@ -21,7 +21,7 @@ def main():
     args = parser.parse_args()
 
     re_match = re.match(
-        "([a-zA-Z0-9]+(-[a-zA-Z0-9\\_\\-]*?)?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
+        "([a-zA-Z0-9]+([\\_\\-][a-zA-Z0-9]+)+?)(-([a-z0-9]+)(-([a-z0-9.]+)-([a-z0-9]+))*)?$",
         args.cname
     )