[Custom Pipelines with Custom Components] fix multiple things (#7304)

* checking to improve pipelines.

* more fixes.

* add: tip to encourage the usage of revision

* Apply suggestions from code review

* retrigger ci

---------
Co-authored-by: YiYi Xu <yixu310@gmail.com>

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

@@ -239,5 +239,7 @@ pipeline.to("cuda")
 prompt = "柴犬、カラフルアート"
 
 image = pipeline(prompt=prompt).images[0]
-
 ```
+
+> [!TIP]
+> When using `trust_remote_code=True`, it is also strongly encouraged to pass a commit hash as a `revision` to make sure the author of the models did not update the code with some malicious new lines (unless you fully trust the authors of the models).
\ No newline at end of file

src/diffusers/pipelines/pipeline_utils.py

@@ -1382,7 +1382,6 @@ class DiffusionPipeline(ConfigMixin, PushToHubMixin):
 
             # Don't download index files of forbidden patterns either
             ignore_patterns = ignore_patterns + [f"{i}.index.*json" for i in ignore_patterns]
-
             re_ignore_pattern = [re.compile(fnmatch.translate(p)) for p in ignore_patterns]
             re_allow_pattern = [re.compile(fnmatch.translate(p)) for p in allow_patterns]
 

src/diffusers/utils/dynamic_modules_utils.py

@@ -329,6 +329,11 @@ def get_cached_module_file(
         # The only reason we do the copy is to avoid putting too many folders in sys.path.
         shutil.copy(resolved_module_file, submodule_path / module_file)
         for module_needed in modules_needed:
+            if len(module_needed.split(".")) == 2:
+                module_needed = "/".join(module_needed.split("."))
+                module_folder = module_needed.split("/")[0]
+                if not os.path.exists(submodule_path / module_folder):
+                    os.makedirs(submodule_path / module_folder)
             module_needed = f"{module_needed}.py"
             shutil.copy(os.path.join(pretrained_model_name_or_path, module_needed), submodule_path / module_needed)
     else:
@@ -343,9 +348,16 @@ def get_cached_module_file(
         create_dynamic_module(full_submodule)
 
         if not (submodule_path / module_file).exists():
+            if len(module_file.split("/")) == 2:
+                module_folder = module_file.split("/")[0]
+                if not os.path.exists(submodule_path / module_folder):
+                    os.makedirs(submodule_path / module_folder)
             shutil.copy(resolved_module_file, submodule_path / module_file)
+
         # Make sure we also have every file with relative
         for module_needed in modules_needed:
+            if len(module_needed.split(".")) == 2:
+                module_needed = "/".join(module_needed.split("."))
             if not (submodule_path / module_needed).exists():
                 get_cached_module_file(
                     pretrained_model_name_or_path,