#5 Introducing windows Github Actions workflow

.github/workflows/cpythonwindowsbuild.yml

@@ -0,0 +1,37 @@
+name: CPython GMIC Windows build
+# Imitating https://github.com/vinecopulib/pyvinecopulib/blob/master/.github/workflows/pypi.yml 
+# and https://github.com/joerick/cibuildwheel/blob/master/.github/workflows/test.yml
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        python-version: ['3.7']
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: build on macos
+        working-directory: ./
+        env:
+          TWINE_PASSWORD_GITHUB_SECRET: ${{ secrets.TWINE_PASSWORD_GITHUB_SECRET }} # For build_tools.bash 11_send_to_pypi
+          PYTHON3: python
+          PIP3: pip
+          CIBW_BUILD: cp3*-*win*
+          # CIBW_ENVIRONMENT: "CC='/usr/local/opt/llvm@6/bin/clang' CXX='/usr/local/opt/llvm@6/bin/clang++' COMPILER_INDEX_STORE_ENABLE='NO'"
+          CIBW_BEFORE_BUILD: pip install -r dev-requirements.txt
+          CIBW_TEST_REQUIRES: pytest
+          CIBW_TEST_COMMAND: python -W default -m pytest {project}/tests/test_gmic_py.py -vvv -rxXs
+          CIBW_BUILD_VERBOSITY: 3
+        run: |
+          # brew install pkg-config fftw libpng libomp llvm@6
+          bash build_tools.bash 1_clean_and_regrab_gmic_src
+          pip install git+https://github.com/joerick/cibuildwheel.git
+          python -m cibuildwheel --output-dir wheelhouse
+          #echo "Mac OS wheelhouse after cibuildwheel looks like:"
+          #bash build_tools.bash 11_send_to_pypi