Add Windows CI (#394)

* [WIP] Add Windows CI

* Remove cu_version

* checkout_merge -> checkout

* Add build script

* Switch backend to soundfile

* Remove soundfile as dependency

* Rename jobs

* Fix lint

.circleci/config.yml

@@ -6,6 +6,9 @@ version: 2.1
 #     - Replace binary_linux_wheel_py3.7 with the name of the job you want to test.
 #       Job names are 'name:' key.
 
+orbs:
+  win: circleci/windows@2.0.0
+
 binary_common: &binary_common
   parameters:
     # Edit these defaults to do a release
@@ -82,6 +85,22 @@ jobs:
           paths:
             - "*"
 
+  binary_win_conda:
+    <<: *binary_common
+    executor:
+      name: win/default
+      shell: bash.exe
+    steps:
+      - checkout
+      - run:
+          command: |
+            choco install miniconda3
+            (& "C:\tools\miniconda3\Scripts\conda.exe" "shell.powershell" "hook") | Out-String | Invoke-Expression
+            conda activate base
+            conda install -yq conda-build "conda-package-handling!=1.5.0"
+            bash packaging/build_conda.sh
+          shell: powershell.exe
+
   binary_macos_wheel:
     <<: *binary_common
     macos:
@@ -283,6 +302,9 @@ workflows:
       - binary_macos_conda:
           name: binary_macos_conda_py3.7
           python_version: '3.7'
+      - binary_win_conda:
+          name: torchaudio_win_py3.6
+          python_version: "3.6"
 
   nightly:
     jobs:

.circleci/config.yml.in

@@ -6,6 +6,9 @@ version: 2.1
 #     - Replace binary_linux_wheel_py3.7 with the name of the job you want to test.
 #       Job names are 'name:' key.
 
+orbs:
+  win: circleci/windows@2.0.0
+
 binary_common: &binary_common
   parameters:
     # Edit these defaults to do a release
@@ -82,6 +85,22 @@ jobs:
           paths:
             - "*"
 
+  binary_win_conda:
+    <<: *binary_common
+    executor:
+      name: win/default
+      shell: bash.exe
+    steps:
+      - checkout
+      - run:
+          command: |
+            choco install miniconda3
+            (& "C:\tools\miniconda3\Scripts\conda.exe" "shell.powershell" "hook") | Out-String | Invoke-Expression
+            conda activate base
+            conda install -yq conda-build "conda-package-handling!=1.5.0"
+            bash packaging/build_conda.sh
+          shell: powershell.exe
+
   binary_macos_wheel:
     <<: *binary_common
     macos:
@@ -229,6 +248,9 @@ workflows:
     jobs:
       - circleci_consistency
       {{ workflows() }}
+      - binary_win_conda:
+          name: torchaudio_win_py3.6
+          python_version: "3.6"
 
   nightly:
 {%- endif %}

packaging/torchaudio/bld.bat

+@echo off
+
+set IS_CONDA=1
+
+python setup.py install --single-version-externally-managed --record=record.txt

setup.py

@@ -80,6 +80,20 @@ pytorch_package_dep = 'torch'
 if pytorch_package_version is not None:
     pytorch_package_dep += "==" + pytorch_package_version
 
+if platform.system() == 'Windows':
+    ext_modules = None
+else:
+    ext_modules = [
+        CppExtension(
+            '_torch_sox',
+            ['torchaudio/torch_sox.cpp'],
+            libraries=libraries,
+            include_dirs=include_dirs,
+            extra_compile_args=eca,
+            extra_objects=extra_objects,
+            extra_link_args=ela),
+    ]
+
 setup(
     name="torchaudio",
     version=version,
@@ -104,16 +118,7 @@ setup(
     ],
     # Exclude the build files.
     packages=find_packages(exclude=["build"]),
-    ext_modules=[
-        CppExtension(
-            '_torch_sox',
-            ['torchaudio/torch_sox.cpp'],
-            libraries=libraries,
-            include_dirs=include_dirs,
-            extra_compile_args=eca,
-            extra_objects=extra_objects,
-            extra_link_args=ela),
-    ],
+    ext_modules=ext_modules,
     cmdclass={'build_ext': BuildExtension},
     install_requires=[pytorch_package_dep]
 )

torchaudio/_backend.py

 from functools import wraps
 
+import platform
 import torch
 
 from . import _soundfile_backend, _sox_backend
 
 
-_audio_backend = "sox"
+_audio_backend = "soundfile" if platform.system() == "Windows" else "sox"
 _audio_backends = {"sox": _sox_backend, "soundfile": _soundfile_backend}