Wrap loading torch ops into a separate function. Do not raise error i…

…f running from sphinx

Summary: This is necessary if we want to run building docs in github workflow

Differential Revision: D63497765

fbshipit-source-id: 018157c205a66584dd040882124588e499439893

drtk/edge_grad_estimator.py

@@ -7,12 +7,11 @@
 
 import torch as th
 import torch.nn.functional as thf
-from drtk import edge_grad_ext
 from drtk.interpolate import interpolate
-from drtk.utils import index
+from drtk.utils import index, load_torch_ops
 
 
-th.ops.load_library(edge_grad_ext.__file__)
+load_torch_ops("drtk.edge_grad_ext")
 
 
 @th.compiler.disable

drtk/grid_scatter.py

@@ -7,9 +7,9 @@
 
 import torch as th
 import torch.nn.functional as thf
-from drtk import grid_scatter_ext
+from drtk.utils import load_torch_ops
 
-th.ops.load_library(grid_scatter_ext.__file__)
+load_torch_ops("drtk.grid_scatter_ext")
 
 
 @th.compiler.disable

drtk/interpolate.py

@@ -9,9 +9,9 @@
 """
 
 import torch as th
-from drtk import interpolate_ext
+from drtk.utils import load_torch_ops
 
-th.ops.load_library(interpolate_ext.__file__)
+load_torch_ops("drtk.interpolate_ext")
 
 
 @th.compiler.disable

drtk/mipmap_grid_sample.py

@@ -7,9 +7,9 @@
 
 import torch as th
 import torch.nn.functional as thf
-from drtk import mipmap_grid_sampler_ext
+from drtk.utils import load_torch_ops
 
-th.ops.load_library(mipmap_grid_sampler_ext.__file__)
+load_torch_ops("drtk.mipmap_grid_sampler_ext")
 
 
 @th.compiler.disable

drtk/msi.py

@@ -4,9 +4,9 @@
 # LICENSE file in the root directory of this source tree.
 
 import torch as th
-from drtk import msi_ext
+from drtk.utils import load_torch_ops
 
-th.ops.load_library(msi_ext.__file__)
+load_torch_ops("drtk.msi_ext")
 
 
 @th.compiler.disable

drtk/rasterize.py

@@ -6,10 +6,9 @@
 from typing import Tuple
 
 import torch as th
+from drtk.utils import load_torch_ops
 
-from drtk import rasterize_ext
-
-th.ops.load_library(rasterize_ext.__file__)
+load_torch_ops("drtk.rasterize_ext")
 
 
 @th.compiler.disable

drtk/render.py

@@ -7,10 +7,9 @@
 from typing import Tuple
 
 import torch as th
+from drtk.utils import load_torch_ops
 
-from drtk import render_ext
-
-th.ops.load_library(render_ext.__file__)
+load_torch_ops("drtk.render_ext")
 
 
 @th.compiler.disable

drtk/utils/__init__.py

@@ -10,6 +10,7 @@
     vert_normals,  # noqa
 )
 from drtk.utils.indexing import index  # noqa
+from drtk.utils.load_torch_ops import load_torch_ops  # noqa
 from drtk.utils.projection import (  # noqa
     DISTORTION_MODES,  # noqa
     project_points,  # noqa

drtk/utils/load_torch_ops.py

@@ -0,0 +1,24 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+import importlib
+
+import torch as th
+
+
+def load_torch_ops(extension: str) -> None:
+    try:
+        module = importlib.import_module(extension)
+        th.ops.load_library(module.__file__)
+    except ImportError as e:
+        import sys
+
+        # If running in sphinx, don't raise an error. That way we can build documentation without
+        # building extensions
+        if "sphinx" in sys.modules:
+            return
+
+        raise e