improve config detection

src/mflux/ui/cli/parsers.py

@@ -63,16 +63,15 @@ def add_controlnet_arguments(self) -> None:
 
     def add_metadata_config(self) -> None:
         self.supports_metadata_config = True
-        self.add_argument("--config-from-metadata", "-C", type=Path, required=False, default=argparse.SUPPRESS, help="Re-use the parameters from prior metadata. Params from metadata are secondary to other args you provide.")
+        self.add_argument("--config-from-metadata", "-C", type=Path, required=False, default=None, help="Re-use the parameters from prior metadata. Params from metadata are secondary to other args you provide.")
 
     def parse_args(self, **kwargs) -> argparse.Namespace:
         namespace = super().parse_args()
         if hasattr(namespace, "path") and namespace.path is not None and namespace.model is None:
             namespace.error("--model must be specified when using --path")
 
-        if getattr(namespace, "config_from_metadata", False):
+        if self.supports_metadata_config and namespace.config_from_metadata is not None:
             prior_gen_metadata = json.load(namespace.config_from_metadata.open("rt"))
-
             if namespace.prompt is None:
                 namespace.prompt = prior_gen_metadata.get("prompt", None)
 
@@ -108,13 +107,13 @@ def parse_args(self, **kwargs) -> argparse.Namespace:
                     namespace.init_image_strength = init_img_strength_from_metadata
 
             if self.supports_controlnet:
+                # todo: support more controlnet flags, but may require a follow-up PR
+                # and maybe after consolidating the flux/cnet implementations somehow
                 if namespace.controlnet_image_path is None:
                     namespace.controlnet_image_path = prior_gen_metadata.get("controlnet_image_path", None)
                 if namespace.controlnet_strength == self.get_default("controlnet_strength") and (cnet_strength_from_metadata := prior_gen_metadata.get("controlnet_strength", None)):
                     namespace.controlnet_strength = cnet_strength_from_metadata
 
-
-
         if namespace.prompt is None:
             # not supplied by CLI and not supplied by metadata config file
             self.error("--prompt argument required or 'prompt' required in metadata config file")