MNT: move most of cibuildwheel config to pyproject.toml

.github/workflows/cibuildwheel.yml

@@ -43,20 +43,12 @@ jobs:
     #  if: runner.os == 'Linux' && matrix.arch == 'aarch64'
 
     - name: Build just oldest and newest on PRs, all on tags
+      if:  ${{ github.event_name }} == pull_request
       shell: bash
-      # - Always omit musllinux_aarch64 because it's slow and niche
       # - On PPs, omit musllinux for speed
       # - On PRs, run just oldest and newest Python versions
       run: |
-        if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-           CIBW_SKIP="cp311-* cp312-* cp313-* *musllinux*"
-        else
-           CIBW_SKIP="*musllinux_aarch64"
-        fi
-        # skip cp310 if building on windows arm64
-        if [[ "${{ matrix.arch }}" == "ARM64" ]]; then
-          CIBW_SKIP="$CIBW_SKIP cp310-*"
-        fi
+        CIBW_SKIP="cp310-win_arm64 cp311-* cp312-* cp313-* *musllinux*"
         echo "CIBW_SKIP=$CIBW_SKIP" >> $GITHUB_ENV
         echo "Setting CIBW_SKIP=$CIBW_SKIP"
 
@@ -65,15 +57,6 @@ jobs:
       env:
         CIBW_SKIP: ${{ env.CIBW_SKIP }}
         CIBW_ARCHS: ${{ matrix.arch }}
-        CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
-        CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
-        # Emulated testing is slow, so trust that the Python 3.14 test is good enough on aarch64
-        # (takes about 5 minutes per wheel to build, and 5 minutes to test)
-        CIBW_TEST_SKIP: "cp3{10,11,12,13}-*_aarch64"
-        CIBW_TEST_GROUPS: dev
-        CIBW_TEST_COMMAND: >
-          python -c "import cftime; print(f'cftime v{cftime.__version__}')" &&
-          python -m pytest -vv {package}/test
 
     - uses: actions/upload-artifact@v6
       with:

pyproject.toml

@@ -106,3 +106,24 @@ ignore = [
     "test",
     "test/*",
 ]
+
+[tool.cibuildwheel]
+build-verbosity = 1
+skip = [
+    "*musllinux_aarch64*",
+    # Skipped due to unavailability of Python binary and NumPy for Win-ARM64
+    "cp310-win_arm64",
+]
+
+test-skip = [
+    # Emulated testing is slow, so trust that the Python 3.14 test is good enough on aarch64
+    # (takes about 5 minutes per wheel to build, and 5 minutes to test)
+    "cp3{10,11,12,13}-*_aarch64",
+]
+test-groups = "dev"
+test-command = [
+    '''python -c "import cftime; print(f'cftime v{cftime.__version__}')"''',
+    "python -m pytest -vv {package}/test"
+]
+manylinux-x86_64-image = "manylinux2014"
+manylinux-aarch64-image = "manylinux2014"