[docs] Community pipelines (huggingface#6929)

fix

Author: stevhliu

docs/source/en/using-diffusers/custom_pipeline_overview.md

@@ -56,6 +56,60 @@ pipeline = DiffusionPipeline.from_pretrained(
 )
 ```
 
+### Load from a local file
+
+Community pipelines can also be loaded from a local file if you pass a file path instead. The path to the passed directory must contain a `pipeline.py` file that contains the pipeline class in order to successfully load it.
+
+```py
+pipeline = DiffusionPipeline.from_pretrained(
+    "runwayml/stable-diffusion-v1-5",
+    custom_pipeline="./path/to/pipeline_directory/",
+    clip_model=clip_model,
+    feature_extractor=feature_extractor,
+    use_safetensors=True,
+)
+```
+
+### Load from a specific version
+
+By default, community pipelines are loaded from the latest stable version of Diffusers. To load a community pipeline from another version, use the `custom_revision` parameter.
+
+<hfoptions id="version">
+<hfoption id="main">
+
+For example, to load from the `main` branch:
+
+```py
+pipeline = DiffusionPipeline.from_pretrained(
+    "runwayml/stable-diffusion-v1-5",
+    custom_pipeline="clip_guided_stable_diffusion",
+    custom_revision="main",
+    clip_model=clip_model,
+    feature_extractor=feature_extractor,
+    use_safetensors=True,
+)
+```
+
+</hfoption>
+<hfoption id="older version">
+
+For example, to load from a previous version of Diffusers like `v0.25.0`:
+
+```py
+pipeline = DiffusionPipeline.from_pretrained(
+    "runwayml/stable-diffusion-v1-5",
+    custom_pipeline="clip_guided_stable_diffusion",
+    custom_revision="v0.25.0",
+    clip_model=clip_model,
+    feature_extractor=feature_extractor,
+    use_safetensors=True,
+)
+```
+
+</hfoption>
+</hfoptions>
+
+
 For more information about community pipelines, take a look at the [Community pipelines](custom_pipeline_examples) guide for how to use them and if you're interested in adding a community pipeline check out the [How to contribute a community pipeline](contribute_pipeline) guide!
 
 ## Community components

src/diffusers/pipelines/pipeline_utils.py

@@ -981,10 +981,9 @@ def from_pretrained(cls, pretrained_model_name_or_path: Optional[Union[str, os.P
             revision (`str`, *optional*, defaults to `"main"`):
                 The specific model version to use. It can be a branch name, a tag name, a commit id, or any identifier
                 allowed by Git.
-            custom_revision (`str`, *optional*, defaults to `"main"`):
+            custom_revision (`str`, *optional*):
                 The specific model version to use. It can be a branch name, a tag name, or a commit id similar to
-                `revision` when loading a custom pipeline from the Hub. It can be a 🤗 Diffusers version when loading a
-                custom pipeline from GitHub, otherwise it defaults to `"main"` when loading from the Hub.
+                `revision` when loading a custom pipeline from the Hub. Defaults to the latest stable 🤗 Diffusers version.
             mirror (`str`, *optional*):
                 Mirror source to resolve accessibility issues if you’re downloading a model in China. We do not
                 guarantee the timeliness or safety of the source, and you should refer to the mirror site for more