setup: build sdists/wheel, release through Github

Author: skshetry

.github/workflows/release.yaml

@@ -0,0 +1,19 @@
+name: Release
+on:
+  release:
+    types: [published]
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.7
+    - run: pip install -U nox pip wheel
+    - run: nox -s build
+    - uses: pypa/gh-action-pypi-publish@master
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_TOKEN }}

.github/workflows/tests.yaml

@@ -14,3 +14,4 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - run: pip install -U nox pip wheel
     - run: nox
+    - run: nox -s build

noxfile.py

@@ -1,5 +1,7 @@
 """Automation using nox.
 """
+import glob
+
 import nox
 
 nox.options.reuse_existing_virtualenvs = True
@@ -26,3 +28,11 @@ def lint(session: nox.Session) -> None:
     session.run("pre-commit", "run", *args)
     session.run("python", "-m", "mypy")
     session.run("python", "-m", "pylint", *locations)
+
+
+@nox.session
+def build(session: nox.Session) -> None:
+    session.install("build", "setuptools", "twine")
+    session.run("python", "-m", "build")
+    dists = glob.glob("dist/*")
+    session.run("twine", "check", *dists, silent=True)