Setup manylinux wheels.

Author: HexDecimal

.github/workflows/python-package.yml

@@ -108,3 +108,43 @@ jobs:
       - name: Confirm package import
         run: |
           python -c "import tcod"
+
+  linux_wheels:
+    runs-on: "ubuntu-20.04"
+    steps:
+      - uses: actions/checkout@v1
+      - name: Checkout submodules
+        run: |
+          git submodule update --init --recursive --depth 1
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.x"
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install twine cibuildwheel==2.0.0
+      - name: Build wheels
+        run: |
+          python -m cibuildwheel --output-dir wheelhouse
+        env:
+          CIBW_BUILD: cp36-* pp*
+          CIBW_ARCHS_LINUX: "x86_64"
+          CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
+          CIBW_MANYLINUX_PYPY_X86_64_IMAGE: manylinux2014
+          CIBW_BEFORE_ALL_LINUX: yum install -y SDL2-devel
+          CIBW_BEFORE_TEST: pip install numpy
+          CIBW_TEST_COMMAND: python -c "import tcod"
+      - name: Archive wheel
+        uses: actions/upload-artifact@v2
+        with:
+          name: wheel-linux
+          path: wheelhouse/*.whl
+          retention-days: 1
+      - name: Upload to PyPI
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          twine upload --skip-existing wheelhouse/*