[Modular] support standard repo (#11944)

* make modular pipeline work with model_index.json

* up

* style

* up

* up

* style

* up more

* Fix MultiControlNet import (#12118)

fix

---------
Co-authored-by: Álvaro Somoza <asomoza@users.noreply.github.com>
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>

src/diffusers/modular_pipelines/modular_pipeline.py

@@ -128,6 +128,15 @@ class PipelineState:
         """
         return {**self.__dict__}
 
+    def __getattr__(self, name):
+        """
+        Allow attribute access to intermediate values. If an attribute is not found in the object, look for it in the
+        intermediates dict.
+        """
+        if name in self.intermediates:
+            return self.intermediates[name]
+        raise AttributeError(f"'{self.__class__.__name__}' object has no attribute '{name}'")
+
     def __repr__(self):
         def format_value(v):
             if hasattr(v, "shape") and hasattr(v, "dtype"):
@@ -638,7 +647,7 @@ class AutoPipelineBlocks(ModularPipelineBlocks):
                 break
 
         if block is None:
-            logger.warning(f"skipping auto block: {self.__class__.__name__}")
+            logger.info(f"skipping auto block: {self.__class__.__name__}")
             return pipeline, state
 
         try:
@@ -1450,9 +1459,10 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
         Args:
             blocks: `ModularPipelineBlocks` instance. If None, will attempt to load
                    default blocks based on the pipeline class name.
-            pretrained_model_name_or_path: Path to a pretrained pipeline configuration. If provided,
-                    will load component specs (only for from_pretrained components) and config values from the saved
-                    modular_model_index.json file.
+            pretrained_model_name_or_path: Path to a pretrained pipeline configuration. Can be None if the pipeline
+                    does not require any additional loading config. If provided, will first try to load component specs
+                    (only for from_pretrained components) and config values from `modular_model_index.json`, then
+                    fallback to `model_index.json` for compatibility with standard non-modular repositories.
             components_manager:
                 Optional ComponentsManager for managing multiple component cross different pipelines and apply
                 offloading strategies.
@@ -1501,8 +1511,30 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
 
         # update component_specs and config_specs from modular_repo
         if pretrained_model_name_or_path is not None:
-            config_dict = self.load_config(pretrained_model_name_or_path, **kwargs)
+            cache_dir = kwargs.pop("cache_dir", None)
+            force_download = kwargs.pop("force_download", False)
+            proxies = kwargs.pop("proxies", None)
+            token = kwargs.pop("token", None)
+            local_files_only = kwargs.pop("local_files_only", False)
+            revision = kwargs.pop("revision", None)
+
+            load_config_kwargs = {
+                "cache_dir": cache_dir,
+                "force_download": force_download,
+                "proxies": proxies,
+                "token": token,
+                "local_files_only": local_files_only,
+                "revision": revision,
+            }
+            # try to load modular_model_index.json
+            try:
+                config_dict = self.load_config(pretrained_model_name_or_path, **load_config_kwargs)
+            except EnvironmentError as e:
+                logger.debug(f"modular_model_index.json not found: {e}")
+                config_dict = None
 
+            # update component_specs and config_specs based on modular_model_index.json
+            if config_dict is not None:
                 for name, value in config_dict.items():
                     # all the components in modular_model_index.json are from_pretrained components
                     if name in self._component_specs and isinstance(value, (tuple, list)) and len(value) == 3:
@@ -1514,6 +1546,36 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
                     elif name in self._config_specs:
                         self._config_specs[name].default = value
 
+            # if modular_model_index.json is not found, try to load model_index.json
+            else:
+                logger.debug(" loading config from model_index.json")
+                try:
+                    from diffusers import DiffusionPipeline
+
+                    config_dict = DiffusionPipeline.load_config(pretrained_model_name_or_path, **load_config_kwargs)
+                except EnvironmentError as e:
+                    logger.debug(f" model_index.json not found in the repo: {e}")
+                    config_dict = None
+
+                # update component_specs and config_specs based on model_index.json
+                if config_dict is not None:
+                    for name, value in config_dict.items():
+                        if name in self._component_specs and isinstance(value, (tuple, list)) and len(value) == 2:
+                            library, class_name = value
+                            component_spec_dict = {
+                                "repo": pretrained_model_name_or_path,
+                                "subfolder": name,
+                                "type_hint": (library, class_name),
+                            }
+                            component_spec = self._dict_to_component_spec(name, component_spec_dict)
+                            component_spec.default_creation_method = "from_pretrained"
+                            self._component_specs[name] = component_spec
+                        elif name in self._config_specs:
+                            self._config_specs[name].default = value
+
+        if len(kwargs) > 0:
+            logger.warning(f"Unexpected input '{kwargs.keys()}' provided. This input will be ignored.")
+
         register_components_dict = {}
         for name, component_spec in self._component_specs.items():
             if component_spec.default_creation_method == "from_config":
@@ -1570,8 +1632,10 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
 
         Args:
             pretrained_model_name_or_path (`str` or `os.PathLike`, optional):
-                Path to a pretrained pipeline configuration. If provided, will load component specs (only for
-                from_pretrained components) and config values from the modular_model_index.json file.
+                Path to a pretrained pipeline configuration. It will first try to load config from
+                `modular_model_index.json`, then fallback to `model_index.json` for compatibility with standard
+                non-modular repositories. If the repo does not contain any pipeline config, it will be set to None
+                during initialization.
             trust_remote_code (`bool`, optional):
                 Whether to trust remote code when loading the pipeline, need to be set to True if you want to create
                 pipeline blocks based on the custom code in `pretrained_model_name_or_path`
@@ -1607,9 +1671,33 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
         }
 
         try:
+            # try to load modular_model_index.json
             config_dict = cls.load_config(pretrained_model_name_or_path, **load_config_kwargs)
+        except EnvironmentError as e:
+            logger.debug(f" modular_model_index.json not found in the repo: {e}")
+            config_dict = None
+
+        if config_dict is not None:
             pipeline_class = _get_pipeline_class(cls, config=config_dict)
-        except EnvironmentError:
+        else:
+            try:
+                logger.debug(" try to load model_index.json")
+                from diffusers import DiffusionPipeline
+                from diffusers.pipelines.auto_pipeline import _get_model
+
+                config_dict = DiffusionPipeline.load_config(pretrained_model_name_or_path, **load_config_kwargs)
+            except EnvironmentError as e:
+                logger.debug(f" model_index.json not found in the repo: {e}")
+
+            if config_dict is not None:
+                logger.debug(" try to determine the modular pipeline class from model_index.json")
+                standard_pipeline_class = _get_pipeline_class(cls, config=config_dict)
+                model_name = _get_model(standard_pipeline_class.__name__)
+                pipeline_class_name = MODULAR_PIPELINE_MAPPING.get(model_name, ModularPipeline.__name__)
+                diffusers_module = importlib.import_module("diffusers")
+                pipeline_class = getattr(diffusers_module, pipeline_class_name)
+            else:
+                # there is no config for modular pipeline, assuming that the pipeline block does not need any from_pretrained components
                 pipeline_class = cls
                 pretrained_model_name_or_path = None
 
@@ -1949,17 +2037,31 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
         for name, component in passed_components.items():
             current_component_spec = self._component_specs[name]
 
-            # warn if type changed
+            # log if type changed
             if current_component_spec.type_hint is not None and not isinstance(
                 component, current_component_spec.type_hint
             ):
-                logger.warning(
+                logger.info(
                     f"ModularPipeline.update_components: adding {name} with new type: {component.__class__.__name__}, previous type: {current_component_spec.type_hint.__name__}"
                 )
             # update _component_specs based on the new component
+            if component is None:
+                new_component_spec = current_component_spec
+                if hasattr(self, name) and getattr(self, name) is not None:
+                    logger.warning(f"ModularPipeline.update_components: setting {name} to None (spec unchanged)")
+            elif current_component_spec.default_creation_method == "from_pretrained" and not (
+                hasattr(component, "_diffusers_load_id") and component._diffusers_load_id is not None
+            ):
+                logger.warning(
+                    f"ModularPipeline.update_components: {name} has no valid _diffusers_load_id. "
+                    f"This will result in empty loading spec, use ComponentSpec.load() for proper specs"
+                )
+                new_component_spec = ComponentSpec(name=name, type_hint=type(component))
+            else:
                 new_component_spec = ComponentSpec.from_component(name, component)
+
             if new_component_spec.default_creation_method != current_component_spec.default_creation_method:
-                logger.warning(
+                logger.info(
                     f"ModularPipeline.update_components: changing the default_creation_method of {name} from {current_component_spec.default_creation_method} to {new_component_spec.default_creation_method}."
                 )
 
@@ -1980,7 +2082,7 @@ class ModularPipeline(ConfigMixin, PushToHubMixin):
             if current_component_spec.type_hint is not None and not isinstance(
                 created_components[name], current_component_spec.type_hint
             ):
-                logger.warning(
+                logger.info(
                     f"ModularPipeline.update_components: adding {name} with new type: {created_components[name].__class__.__name__}, previous type: {current_component_spec.type_hint.__name__}"
                 )
             # update _component_specs based on the user passed component_spec

src/diffusers/modular_pipelines/stable_diffusion_xl/before_denoise.py

@@ -22,7 +22,7 @@ from ...configuration_utils import FrozenDict
 from ...guiders import ClassifierFreeGuidance
 from ...image_processor import VaeImageProcessor
 from ...models import AutoencoderKL, ControlNetModel, ControlNetUnionModel, UNet2DConditionModel
-from ...pipelines.controlnet.multicontrolnet import MultiControlNetModel
+from ...models.controlnets.multicontrolnet import MultiControlNetModel
 from ...schedulers import EulerDiscreteScheduler
 from ...utils import logging
 from ...utils.torch_utils import randn_tensor, unwrap_module

src/diffusers/pipelines/pipeline_utils.py

@@ -1709,6 +1709,36 @@ class DiffusionPipeline(ConfigMixin, PushToHubMixin):
                 logger.warning(f"cannot get type annotation for Parameter {k} of {cls}.")
         return signature_types
 
+    @property
+    def parameters(self) -> Dict[str, Any]:
+        r"""
+        The `self.parameters` property can be useful to run different pipelines with the same weights and
+        configurations without reallocating additional memory.
+
+        Returns (`dict`):
+            A dictionary containing all the optional parameters needed to initialize the pipeline.
+
+        Examples:
+
+        ```py
+        >>> from diffusers import (
+        ...     StableDiffusionPipeline,
+        ...     StableDiffusionImg2ImgPipeline,
+        ...     StableDiffusionInpaintPipeline,
+        ... )
+
+        >>> text2img = StableDiffusionPipeline.from_pretrained("stable-diffusion-v1-5/stable-diffusion-v1-5")
+        >>> img2img = StableDiffusionImg2ImgPipeline(**text2img.components, **text2img.parameters)
+        >>> inpaint = StableDiffusionInpaintPipeline(**text2img.components, **text2img.parameters)
+        ```
+        """
+        expected_modules, optional_parameters = self._get_signature_keys(self)
+        pipeline_parameters = {
+            k: self.config[k] for k in self.config.keys() if not k.startswith("_") and k in optional_parameters
+        }
+
+        return pipeline_parameters
+
     @property
     def components(self) -> Dict[str, Any]:
         r"""