Backport PR #28554: BLD: Enable wheels on Windows-on-ARM

tacaswell · meeseeksmachine · commit ca2381021e34 · 2025-07-24T18:35:29.000Z
diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
@@ -127,7 +127,9 @@ jobs:
           - os: ubuntu-24.04-arm
             cibw_archs: "aarch64"
           - os: windows-latest
-            cibw_archs: "auto64"
+            cibw_archs: "AMD64"
+          - os: windows-11-arm
+            cibw_archs: "ARM64"
           - os: macos-13
             cibw_archs: "x86_64"
           - os: macos-14
@@ -183,7 +185,7 @@ jobs:
           CIBW_BUILD: "pp310-*"
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
           CIBW_ENABLE: pypy
-        if: matrix.cibw_archs != 'aarch64' && matrix.os != 'windows-latest'
+        if: matrix.cibw_archs != 'aarch64' && matrix.os != 'windows-latest' && matrix.os != 'windows-11-arm'
 
       - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882  # v4.4.3
         with:
diff --git a/pyproject.toml b/pyproject.toml
@@ -85,6 +85,14 @@ local_scheme = "node-and-date"
 parentdir_prefix_version = "matplotlib-"
 fallback_version = "0.0+UNKNOWN"
 
+# FIXME: Remove this override once dependencies are available on PyPI.
+[[tool.cibuildwheel.overrides]]
+select = "*-win_arm64"
+before-test = """\
+    pip install --pre \
+    --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple \
+    contourpy numpy"""
+
 [tool.isort]
 known_pydata = "numpy, matplotlib.pyplot"
 known_firstparty = "matplotlib,mpl_toolkits"
