ci: add windows

.github/workflows/ci.yml

@@ -12,14 +12,15 @@ on:
 jobs:
 
   core:
+    timeout-minutes: 5
 
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
         python: ['3.9', '3.11']
 
     env:
-      FC: gfortran-11
+      FC: gfortran-12
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -36,7 +37,31 @@ jobs:
 
     - run: pytest
 
-    # - run: pip install codecov pytest-cov
-    # - run: pytest --cov --cov-report=xml
-    # - name: Upload coverage to Codecov
-    #   uses: codecov/codecov-action@v1
+  windows:
+      needs: core
+      runs-on: windows-latest
+      timeout-minutes: 10
+
+      steps:
+      - uses: msys2/setup-msys2@v2
+        with:
+          update: true
+          install: >-
+            mingw-w64-x86_64-gcc-fortran
+      # Github actions Gfortran in default image is messed up.
+
+      - name: Put MSYS2_MinGW64 on PATH
+        run: echo "${{ runner.temp }}/msys64/mingw64/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
+      - uses: actions/checkout@v3
+
+      - run: python -m pip install .[tests,lint]
+
+      - run: flake8
+      - run: mypy
+
+      - run: pytest -v