Build and test wheels using CI

.github/workflows/build_and_test.yml

@@ -0,0 +1,74 @@
+name: Build and test packages
+
+on: [push]
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build-sdist:
+    name: Build source distribution
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Build source distribution
+        run: |
+          python -m pip install build
+          python -m build --sdist
+      - name: Upload source distribution
+        uses: actions/upload-artifact@v2
+        with:
+          name: sdist-${{ github.sha }}
+          path: ./dist/webp-*.tar.gz
+          retention-days: 7
+
+  test-sdist:
+    name: Test source distribution
+    needs: build-sdist
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Fetch source distribution
+        uses: actions/download-artifact@v2
+        with:
+          name: sdist-${{ github.sha }}
+          path: dist/
+      - name: Set up Python 3.6
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Install the package
+        run: |
+          python -m pip install dist/webp-*.tar.gz
+      - name: Test with pytest
+        run: |
+          python -m pip install pytest
+          pytest tests/
+
+  build-wheels:
+    name: Build and test wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019]
+    env:
+      CIBW_BUILD: 'cp3*-manylinux_x86_64 cp3*-win_amd64'
+      CIBW_TEST_REQUIRES: pytest
+      CIBW_TEST_COMMAND: pytest {package}/tests
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+      - name: Install cibuildwheel
+        run: python -m pip install cibuildwheel==2.3.1
+      - name: Build wheels
+        run: python -m cibuildwheel --output-dir wheelhouse
+      - uses: actions/upload-artifact@v2
+        with:
+          name: wheels-${{ github.sha }}
+          path: ./wheelhouse/*.whl
+          retention-days: 7

README.md

@@ -110,22 +110,23 @@ with open('anim.webp', 'rb') as f:
 $ pytest tests/
 ```
 
-### Cutting releases
-
-Source release:
-
-```console
-$ pip3 install build twine
-$ python3 -m build --sdist
-$ twine upload dist/webp-*.tar.gz
-```
-
-Linux binary wheel release (repeat for different Python versions and architectures):
-
-```console
-$ docker run -it -v `pwd`:/io -w /io quay.io/pypa/manylinux2014_x86_64 ./build_manylinux_wheels.sh
-$ twine upload dist/webp-*-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
-```
+### Cutting a new release
+
+1. Ensure that tests are passing and everything is ready for release.
+2. Create and push a Git tag:
+   ```console
+   $ git tag -a v0.1.4
+   $ git push --tags
+   ```
+3. Download the artifacts from GitHub Actions, which will include the source distribution tarball and binary wheels.
+4. Create a new release on GitHub from the tagged commit and upload the packages as attachments to the release.
+5. Also upload the packages to PyPI using Twine:
+   ```console
+   $ twine upload webp-*.tar.gz webp-*.whl
+   ```
+6. Bump the version number in `setup.cfg` and create a commit, signalling the start of development on the next version.
+
+These files should also be added to a GitHub release.
 
 ## Known issues