WIP Add an option to igore version specified in image.yaml

dogen/cli.py

@@ -53,6 +53,7 @@ def run(self):
             '--version', action='version', help='Show version and exit', version=version)
 
         parser.add_argument('--without-sources', '--ws', action='store_true', help='Do not process sources, only generate Dockerfile')
+        parser.add_argument('--ignore-version', action='store_true', help='Allow to use different version of Dogen than specifed in descriptor')
         parser.add_argument('--skip-ssl-verification', action='store_true', help='Should we skip SSL verification when retrieving data?')
         parser.add_argument('--scripts-path', help='Location of the scripts directory containing script packages.')
         parser.add_argument('--additional-script', action='append', help='Location of additional script (can be url). Can be specified multiple times.')

dogen/generator.py

@@ -28,6 +28,7 @@ def __init__(self, log, args, plugins=[]):
         self.template = args.template
         self.scripts_path = args.scripts_path
         self.additional_scripts = args.additional_script
+        self.ignore_version = args.ignore_version
 
         ssl_verify = None
         if args.skip_ssl_verification:
@@ -109,7 +110,11 @@ def configure(self):
             # Check if the current runnig version of Dogen
             # is the one the descriptor is expecting.
             if required_version != version:
-                raise Error("You try to parse descriptor that requires Dogen version %s, but you run version %s" % (required_version, version))
+                message = "You try to parse descriptor that requires Dogen version %s, but you run version %s" % (required_version, version)
+                if self.ignore_version:
+                    self.log.warn(message)
+                else:
+                    raise Error(message)
 
         ssl_verify = dogen_cfg.get('ssl_verify')