support metadata files as CLI arg supplier

README.md

@@ -45,11 +45,11 @@ like [Numpy](https://numpy.org) and [Pillow](https://pypi.org/project/pillow/) f
 
 
 ### 💿 Installation
-For users, the easiest way to install MFLUX is to use `uv tool`: If you have [installed `uv`](https://github.com/astral-sh/uv?tab=readme-ov-file#installation), simply: 
+For users, the easiest way to install MFLUX is to use `uv tool`: If you have [installed `uv`](https://github.com/astral-sh/uv?tab=readme-ov-file#installation), simply:
 
 ```sh
 uv tool install --upgrade mflux
-``` 
+```
 
 to get the `mflux-generate` and related command line executables. You can skip to the usage guides below.
 
@@ -80,7 +80,7 @@ pip install -U mflux
 ```sh
  make install
  ```
-3. To run the test suite 
+3. To run the test suite
 ```sh
  make test
  ```
@@ -152,6 +152,76 @@ mflux-generate --model dev --prompt "Luxury food photograph" --steps 25 --seed 2
 
 - **`--controlnet-save-canny`** (optional, bool, default: False): If set, saves the Canny edge detection reference image used by ControlNet.
 
+- **`--config-from-metadata`** or **`-C`** (optional, `str`): [EXPERIMENTAL] Path to a prior file saved via `--metadata`, or a compatible handcrafted config file adhering to the expected args schema.
+
+<details>
+<summary>parameters supported by config files</summary>
+
+#### How configs are used
+
+- all config properties are optional and applied to the image generation if applicable
+- invalid or incompatible properties will be ignored
+
+#### Config schema
+
+```json
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "properties": {
+    "seed": {
+      "type": ["integer", "null"]
+    },
+    "steps": {
+      "type": ["integer", "null"]
+    },
+    "guidance": {
+      "type": ["number", "null"]
+    },
+    "quantize": {
+      "type": ["null", "string"]
+    },
+    "lora_paths": {
+      "type": ["array", "null"],
+      "items": {
+        "type": "string"
+      }
+    },
+    "lora_scales": {
+      "type": ["array", "null"],
+      "items": {
+        "type": "number"
+      }
+    },
+    "prompt": {
+      "type": ["string", "null"]
+    }
+  }
+}
+```
+
+#### Example
+
+```json
+{
+  "model": "dev",
+  "seed": 42,
+  "steps": 8,
+  "guidance": 3.0,
+  "quantize": 4,
+  "lora_paths": [
+    "/some/path1/to/subject.safetensors",
+    "/some/path2/to/style.safetensors"
+  ],
+  "lora_scales": [
+    0.8,
+    0.4
+  ],
+  "prompt": "award winning modern art, MOMA"
+}
+```
+</details>
+
 Or, with the correct python environment active, create and run a separate script like the following:
 
 ```python
@@ -304,7 +374,7 @@ mflux-save \
 
 *Note that when saving a quantized version, you will need the original huggingface weights.*
 
-It is also possible to specify [LoRA](#-lora) adapters when saving the model, e.g 
+It is also possible to specify [LoRA](#-lora) adapters when saving the model, e.g
 
 ```sh
 mflux-save \
@@ -453,7 +523,7 @@ To report additional formats, examples or other any suggestions related to LoRA
 ### 🕹️ Controlnet
 
 MFLUX has [Controlnet](https://huggingface.co/docs/diffusers/en/using-diffusers/controlnet) support for an even more fine-grained control
-of the image generation. By providing a reference image via `--controlnet-image-path` and a strength parameter via `--controlnet-strength`, you can guide the generation toward the reference image.  
+of the image generation. By providing a reference image via `--controlnet-image-path` and a strength parameter via `--controlnet-strength`, you can guide the generation toward the reference image.
 
 ```sh
 mflux-generate-controlnet \
@@ -474,10 +544,10 @@ mflux-generate-controlnet \
 *This example combines the controlnet reference image with the LoRA [Dark Comic Flux](https://civitai.com/models/742916/dark-comic-flux)*.
 
 ⚠️ *Note: Controlnet requires an additional one-time download of ~3.58GB of weights from Huggingface. This happens automatically the first time you run the `generate-controlnet` command.
-At the moment, the Controlnet used is [InstantX/FLUX.1-dev-Controlnet-Canny](https://huggingface.co/InstantX/FLUX.1-dev-Controlnet-Canny), which was trained for the `dev` model. 
-It can work well with `schnell`, but performance is not guaranteed.* 
+At the moment, the Controlnet used is [InstantX/FLUX.1-dev-Controlnet-Canny](https://huggingface.co/InstantX/FLUX.1-dev-Controlnet-Canny), which was trained for the `dev` model.
+It can work well with `schnell`, but performance is not guaranteed.*
 
-⚠️ *Note: The output can be highly sensitive to the controlnet strength and is very much dependent on the reference image. 
+⚠️ *Note: The output can be highly sensitive to the controlnet strength and is very much dependent on the reference image.
 Too high settings will corrupt the image. A recommended starting point a value like 0.4 and to play around with the strength.*
 
 
@@ -492,7 +562,15 @@ with different prompts and LoRA adapters active.
 - Negative prompts not supported.
 - LoRA weights are only supported for the transformer part of the network.
 - Some LoRA adapters does not work.
-- Currently, the supported controlnet is the [canny-only version](https://huggingface.co/InstantX/FLUX.1-dev-Controlnet-Canny). 
+- Currently, the supported controlnet is the [canny-only version](https://huggingface.co/InstantX/FLUX.1-dev-Controlnet-Canny).
+
+### Workflow Tips
+
+- To hide the model fetching status progress bars, `export HF_HUB_DISABLE_PROGRESS_BARS=1`
+- Use config files to save complex job parameters in a file instead of passing many `--args`
+- Set up shell aliases for required args examples:
+  - shortcut for dev model: `alias mflux-dev='mflux-generate --model dev'`
+  - shortcut for schnell model *and* always save metadata: `alias mflux-schnell='mflux-generate --model schnell --metadata'`
 
 ### ✅ TODO
 
@@ -505,4 +583,4 @@ with different prompts and LoRA adapters active.
 
 ### License
 
-This project is licensed under the [MIT License](LICENSE).
+This project is licensed under the [MIT License](LICENSE).

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "mflux"
-version = "0.3.0"
+version = "0.4.0"
 description = "A MLX port of FLUX based on the Huggingface Diffusers implementation."
 readme = "README.md"
 keywords = ["diffusers", "flux", "mlx"]
@@ -36,9 +36,7 @@ classifiers = [
 ]
 
 [project.optional-dependencies]
-dev = [
-    "pytest>=8.0.0,<9.0"
-]
+dev = ["pytest>=8.0.0,<9.0"]
 
 [project.urls]
 homepage = "https://github.com/filipstrand/mflux"

src/mflux/config/config.py

@@ -16,7 +16,7 @@ def __init__(
         width: int = 1024,
         height: int = 1024,
         guidance: float = 4.0,
-        init_image: Path | None = None,
+        init_image_path: Path | None = None,
         init_image_strength: float | None = None,
         seed: float | None = None,
     ):
@@ -26,7 +26,7 @@ def __init__(
         self.height = 16 * (height // 16)
         self.num_inference_steps = num_inference_steps
         self.guidance = guidance
-        self.init_image = init_image
+        self.init_image_path = init_image_path
         self.init_image_strength = init_image_strength
         self.seed = seed or int(time.time())
 

src/mflux/config/runtime_config.py

@@ -49,9 +49,17 @@ def precision(self) -> mx.Dtype:
     def num_train_steps(self) -> int:
         return self.model_config.num_train_steps
 
+    @property
+    def init_image_path(self) -> int:
+        return self.config.init_image_path
+
+    @property
+    def init_image_strength(self) -> int:
+        return self.config.init_image_strength
+
     @property
     def init_time_step(self) -> int:
-        if self.config.init_image is None:
+        if self.config.init_image_path is None:
             # text to image, always begin at time step 0
             return 0
         else:
@@ -69,8 +77,8 @@ def init_latents(self) -> mx.array:
             shape=[1, (self.height // 16) * (self.width // 16), 64],
             key=mx.random.key(self.seed)
         )  # fmt: off
-        if self.config.init_image is not None:
-            user_image = ImageUtil.load_image(self.config.init_image).convert("RGB")
+        if self.config.init_image_path is not None:
+            user_image = ImageUtil.load_image(self.config.init_image_path).convert("RGB")
             latents = ArrayUtil.pack_latents(
                 self.vae.encode(ImageUtil.to_array(ImageUtil.scale_to_dimensions(user_image, self.width, self.height))),
                 self.width,

src/mflux/controlnet/flux_controlnet.py

@@ -202,6 +202,7 @@ def generate_image(
             lora_scales=self.lora_scales,
             config=config,
             controlnet_image_path=controlnet_image_path,
+            controlnet_strength=config.controlnet_strength,
         )
 
     def _set_model_weights(self, weights):

src/mflux/flux/flux.py

@@ -139,6 +139,8 @@ def generate_image(
             generation_time=time_steps.format_dict["elapsed"],
             lora_paths=self.lora_paths,
             lora_scales=self.lora_scales,
+            init_image_path=config.init_image_path,
+            init_image_strength=config.init_image_strength,
             config=config,
         )
 

src/mflux/generate.py

@@ -10,7 +10,7 @@ def main():
     parser = CommandLineParser(description="Generate an image based on a prompt.")
     parser.add_model_arguments()
     parser.add_lora_arguments()
-    parser.add_image_generator_arguments()
+    parser.add_image_generator_arguments(supports_metadata_config=True)
     parser.add_image_to_image_arguments(required=False)
     parser.add_output_arguments()
     args = parser.parse_args()
@@ -35,7 +35,7 @@ def main():
                 height=args.height,
                 width=args.width,
                 guidance=args.guidance,
-                init_image=args.init_image,
+                init_image_path=args.init_image_path,
                 init_image_strength=args.init_image_strength,
                 seed=args.seed
             ),

src/mflux/generate_controlnet.py

@@ -9,7 +9,7 @@ def main():
     parser = CommandLineParser(description="Generate an image based on a prompt and a controlnet reference image.")  # fmt: off
     parser.add_model_arguments()
     parser.add_lora_arguments()
-    parser.add_image_generator_arguments()
+    parser.add_image_generator_arguments(supports_metadata_config=True)
     parser.add_controlnet_arguments()
     parser.add_output_arguments()
     args = parser.parse_args()

src/mflux/post_processing/generated_image.py

@@ -22,8 +22,10 @@ def __init__(
         generation_time: float,
         lora_paths: list[str],
         lora_scales: list[float],
-        controlnet_image_path: str | None = None,
+        controlnet_image_path: str | pathlib.Path | None = None,
         controlnet_strength: float | None = None,
+        init_image_path: str | pathlib.Path | None = None,
+        init_image_strength: float | None = None,
     ):
         self.image = image
         self.model_config = model_config
@@ -36,29 +38,38 @@ def __init__(
         self.generation_time = generation_time
         self.lora_paths = lora_paths
         self.lora_scales = lora_scales
-        self.controlnet_image = controlnet_image_path
+        self.controlnet_image_path = controlnet_image_path
         self.controlnet_strength = controlnet_strength
+        self.init_image_path = init_image_path
+        self.init_image_strength = init_image_strength
 
     def save(self, path: t.Union[str, pathlib.Path], export_json_metadata: bool = False) -> None:
         from mflux import ImageUtil
 
         ImageUtil.save_image(self.image, path, self._get_metadata(), export_json_metadata)
 
     def _get_metadata(self) -> dict:
+        """Generate metadata for reference as well as input data for
+        command line --config-from-metadata arg in future generations.
+        """
         return {
+            # mflux_version is used by future metadata readers
+            # to determine supportability of metadata-derived workflows
             "mflux_version": str(GeneratedImage.get_version()),
             "model": str(self.model_config.alias),
-            "seed": str(self.seed),
-            "steps": str(self.steps),
-            "guidance": "None" if self.model_config == ModelConfig.FLUX1_SCHNELL else str(self.guidance),
-            "precision": f"{self.precision}",
-            "quantization": "None" if self.quantization is None else f"{self.quantization} bit",
-            "generation_time": f"{self.generation_time:.2f} seconds",
-            "lora_paths": ", ".join(self.lora_paths) if self.lora_paths else "None",
-            "lora_scales": ", ".join([f"{scale:.2f}" for scale in self.lora_scales]) if self.lora_scales else "None",
+            "seed": self.seed,
+            "steps": self.steps,
+            "guidance": self.guidance if ModelConfig.FLUX1_DEV else None,  # only the dev model supports guidance
+            "precision": str(self.precision),
+            "quantize": self.quantization,
+            "generation_time_seconds": round(self.generation_time, 2),
+            "lora_paths": [str(p) for p in self.lora_paths] if self.lora_paths else None,
+            "lora_scales": [round(scale, 2) for scale in self.lora_scales] if self.lora_scales else None,
+            "init_image_path": str(self.init_image_path) if self.init_image_path else None,
+            "init_image_strength": self.init_image_strength if self.init_image_path else None,
+            "controlnet_image_path": str(self.controlnet_image_path) if self.controlnet_image_path else None,
+            "controlnet_strength": round(self.controlnet_strength, 2) if self.controlnet_strength else None,
             "prompt": self.prompt,
-            "controlnet_image": "None" if self.controlnet_image is None else self.controlnet_image,
-            "controlnet_strength": "None" if self.controlnet_strength is None else f"{self.controlnet_strength:.2f}",
         }
 
     @staticmethod

src/mflux/post_processing/image_util.py

@@ -28,6 +28,8 @@ def to_image(
         lora_scales: list[float],
         config: RuntimeConfig,
         controlnet_image_path: str | None = None,
+        init_image_path: str | None = None,
+        init_image_strength: float | None = None,
     ) -> GeneratedImage:
         normalized = ImageUtil._denormalize(decoded_latents)
         normalized_numpy = ImageUtil._to_numpy(normalized)
@@ -44,6 +46,8 @@ def to_image(
             generation_time=generation_time,
             lora_paths=lora_paths,
             lora_scales=lora_scales,
+            init_image_path=init_image_path,
+            init_image_strength=init_image_strength,
             controlnet_image_path=controlnet_image_path,
             controlnet_strength=config.controlnet_strength if isinstance(config.config, ConfigControlnet) else None,
         )