[Refactor] move sag out of `stable_diffusion` (#6264)

move sag out of .

src/diffusers/pipelines/__init__.py

@@ -189,13 +189,13 @@ else:
             "StableDiffusionLDM3DPipeline",
             "StableDiffusionPanoramaPipeline",
             "StableDiffusionPipeline",
-            "StableDiffusionSAGPipeline",
             "StableDiffusionUpscalePipeline",
             "StableUnCLIPImg2ImgPipeline",
             "StableUnCLIPPipeline",
         ]
     )
     _import_structure["stable_diffusion_safe"] = ["StableDiffusionPipelineSafe"]
+    _import_structure["stable_diffusion_sag"] = ["StableDiffusionSAGPipeline"]
     _import_structure["stable_diffusion_gligen"] = [
         "StableDiffusionGLIGENPipeline",
         "StableDiffusionGLIGENTextImagePipeline",
@@ -431,7 +431,6 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
             StableDiffusionLDM3DPipeline,
             StableDiffusionPanoramaPipeline,
             StableDiffusionPipeline,
-            StableDiffusionSAGPipeline,
             StableDiffusionUpscalePipeline,
             StableUnCLIPImg2ImgPipeline,
             StableUnCLIPPipeline,
@@ -439,6 +438,7 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
         from .stable_diffusion_diffedit import StableDiffusionDiffEditPipeline
         from .stable_diffusion_gligen import StableDiffusionGLIGENPipeline, StableDiffusionGLIGENTextImagePipeline
         from .stable_diffusion_safe import StableDiffusionPipelineSafe
+        from .stable_diffusion_sag import StableDiffusionSAGPipeline
         from .stable_diffusion_xl import (
             StableDiffusionXLImg2ImgPipeline,
             StableDiffusionXLInpaintPipeline,

src/diffusers/pipelines/stable_diffusion/__init__.py

@@ -42,7 +42,6 @@ else:
     _import_structure["pipeline_stable_diffusion_model_editing"] = ["StableDiffusionModelEditingPipeline"]
     _import_structure["pipeline_stable_diffusion_panorama"] = ["StableDiffusionPanoramaPipeline"]
     _import_structure["pipeline_stable_diffusion_paradigms"] = ["StableDiffusionParadigmsPipeline"]
-    _import_structure["pipeline_stable_diffusion_sag"] = ["StableDiffusionSAGPipeline"]
     _import_structure["pipeline_stable_diffusion_upscale"] = ["StableDiffusionUpscalePipeline"]
     _import_structure["pipeline_stable_unclip"] = ["StableUnCLIPPipeline"]
     _import_structure["pipeline_stable_unclip_img2img"] = ["StableUnCLIPImg2ImgPipeline"]
@@ -132,7 +131,6 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
         )
         from .pipeline_stable_diffusion_ldm3d import StableDiffusionLDM3DPipeline
         from .pipeline_stable_diffusion_panorama import StableDiffusionPanoramaPipeline
-        from .pipeline_stable_diffusion_sag import StableDiffusionSAGPipeline
         from .pipeline_stable_diffusion_upscale import StableDiffusionUpscalePipeline
         from .pipeline_stable_unclip import StableUnCLIPPipeline
         from .pipeline_stable_unclip_img2img import StableUnCLIPImg2ImgPipeline

src/diffusers/pipelines/stable_diffusion_sag/__init__.py

+from typing import TYPE_CHECKING
+
+from ...utils import (
+    DIFFUSERS_SLOW_IMPORT,
+    OptionalDependencyNotAvailable,
+    _LazyModule,
+    get_objects_from_module,
+    is_torch_available,
+    is_transformers_available,
+)
+
+
+_dummy_objects = {}
+_import_structure = {}
+
+
+try:
+    if not (is_transformers_available() and is_torch_available()):
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    from ...utils import dummy_torch_and_transformers_objects  # noqa F403
+
+    _dummy_objects.update(get_objects_from_module(dummy_torch_and_transformers_objects))
+else:
+    _import_structure["pipeline_stable_diffusion_sag"] = ["StableDiffusionSAGPipeline"]
+
+if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
+    try:
+        if not (is_transformers_available() and is_torch_available()):
+            raise OptionalDependencyNotAvailable()
+
+    except OptionalDependencyNotAvailable:
+        from ...utils.dummy_torch_and_transformers_objects import *
+    else:
+        from .pipeline_stable_diffusion_sag import StableDiffusionSAGPipeline
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(
+        __name__,
+        globals()["__file__"],
+        _import_structure,
+        module_spec=__spec__,
+    )
+
+    for name, value in _dummy_objects.items():
+        setattr(sys.modules[__name__], name, value)

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_sag.py → src/diffusers/pipelines/stable_diffusion_sag/pipeline_stable_diffusion_sag.py

@@ -34,8 +34,8 @@ from ...utils import (
 )
 from ...utils.torch_utils import randn_tensor
 from ..pipeline_utils import DiffusionPipeline
-from . import StableDiffusionPipelineOutput
-from .safety_checker import StableDiffusionSafetyChecker
+from ..stable_diffusion import StableDiffusionPipelineOutput
+from ..stable_diffusion.safety_checker import StableDiffusionSafetyChecker
 
 
 logger = logging.get_logger(__name__)  # pylint: disable=invalid-name