[Windows] Add CI wheel build jobs for Windows

ghstack-source-id: 912aad1
ghstack-comment-id: 3240461597
Pull-Request: #13837

Author: GregoryComer

.ci/scripts/wheel/envvar_windows.sh

@@ -0,0 +1,11 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# This file is sourced into the environment before building a pip wheel. It
+# should typically only contain shell variable assignments. Be sure to export
+# any variables so that subprocesses will see them.
+
+source "${GITHUB_WORKSPACE}/${REPOSITORY}/.ci/scripts/wheel/envvar_base.sh"

.ci/scripts/wheel/pre_build_script.sh

@@ -9,6 +9,17 @@ set -euxo pipefail
 
 # This script is run before building ExecuTorch binaries
 
+# Enable long paths (relevant for Windows, but can run on any system).
+git config --system core.longpaths true
+
+# Clone nested submodules for tokenizers - this is a workaround for recursive
+# submodule clone failing due to path length limitations on Windows. Eventually,
+# we should update the core job in test-infra to enable long paths before
+# checkout to avoid needing to do this.
+pushd extension/llm/tokenizers
+git submodule update --init
+popd
+
 # Manually install build requirements because `python setup.py bdist_wheel` does
 # not install them. TODO(dbort): Switch to using `python -m build --wheel`,
 # which does install them. Though we'd need to disable build isolation to be

.ci/scripts/wheel/test_windows.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+import test_base
+from examples.models import Backend, Model
+
+if __name__ == "__main__":
+    test_base.run_tests(
+        model_tests=[
+            test_base.ModelTest(
+                model=Model.Mv3,
+                backend=Backend.XnnpackQuantizationDelegation,
+            ),
+        ]
+    )

.github/workflows/build-wheels-windows.yml

@@ -0,0 +1,63 @@
+name: Build Windows Wheels
+
+on:
+  pull_request:
+    paths:
+      - .ci/**/*
+      - .github/workflows/build-wheels-windows.yml
+      - examples/**/*
+      - pyproject.toml
+      - setup.py
+    tags:
+      - ciflow/binaries/*
+  push:
+    branches:
+      - nightly
+      - release/*
+    tags:
+      # NOTE: Binary build pipelines should only get triggered on release candidate builds
+      # Release candidate tags look like: v1.11.0-rc1
+      - v[0-9]+.[0-9]+.[0-9]+-rc[0-9]+
+      - ciflow/binaries/*
+  workflow_dispatch:
+
+jobs:
+  generate-matrix:
+    uses: pytorch/test-infra/.github/workflows/generate_binary_build_matrix.yml@main
+    with:
+      package-type: wheel
+      os: windows
+      test-infra-repository: pytorch/test-infra
+      test-infra-ref: main
+      with-cuda: disabled
+      with-rocm: disabled
+      python-versions: '["3.10", "3.11", "3.12"]'
+
+  build:
+    needs: generate-matrix
+    permissions:
+      id-token: write
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - repository: pytorch/executorch
+            pre-script: .ci/scripts/wheel/pre_build_script.sh
+            post-script: .ci/scripts/wheel/post_build_script.sh
+            smoke-test-script: .ci/scripts/wheel/test_windows.py
+            package-name: executorch
+    name: ${{ matrix.repository }}
+    uses: pytorch/test-infra/.github/workflows/build_wheels_windows.yml@main
+    with:
+      repository: ${{ matrix.repository }}
+      ref: ""
+      test-infra-repository: pytorch/test-infra
+      test-infra-ref: main
+      build-matrix: ${{ needs.generate-matrix.outputs.matrix }}
+      submodules: true
+      pre-script: ${{ matrix.pre-script }}
+      post-script: ${{ matrix.post-script }}
+      package-name: ${{ matrix.package-name }}
+      smoke-test-script: ${{ matrix.smoke-test-script }}
+      trigger-event: ${{ github.event_name }}

third-party/CMakeLists.txt

@@ -25,6 +25,11 @@ else()
   set(_executorch_external_project_additional_args CMAKE_GENERATOR "Unix Makefiles")
 endif()
 
+# DEBUG
+if(WIN32)
+  set_directory_properties(PROPERTIES EP_BASE "C:\\actions-runner\\_work\\")
+endif()
+
 # We use ExternalProject to build flatc from source to force it target the host.
 # Otherwise, flatc will target the project's toolchain (i.e. iOS, or Android).
 ExternalProject_Add(