Add release.yml file for automated release with Github Action

See https://github.com/cdce8p/python-typing-update/blob/f79966eb104f220fdcc78f87764eb74ab6e527c2/.github/workflows/release.yaml

Author: Pierre-Sassoulas

.github/workflows/release.yml

@@ -0,0 +1,37 @@
+name: Release
+
+on:
+  release:
+    types:
+      - published
+
+env:
+  DEFAULT_PYTHON: 3.9
+
+jobs:
+  release-pypi:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code from Github
+        uses: actions/[email protected]
+      - name: Set up Python ${{ env.DEFAULT_PYTHON }}
+        id: python
+        uses: actions/[email protected]
+        with:
+          python-version: ${{ env.DEFAULT_PYTHON }}
+      - name: Install requirements
+        run: |
+          python -m pip install -U pip twine wheel
+          python -m pip install -U "setuptools>=56.0.0"
+      - name: Build distributions
+        run: |
+          python setup.py sdist bdist_wheel
+      - name: Upload to PyPI
+        if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags')
+        env:
+          TWINE_REPOSITORY: pypi
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        run: |
+          twine upload --verbose dist/*

doc/release.md

@@ -8,18 +8,7 @@ So, you want to release the `X.Y.Z` version of astroid ?
 2. Install the release dependencies `pip3 install pre-commit tbump`
 3. Bump the version and release by using `tbump X.Y.Z --no-push`.
 4. Check the result.
-5. Until the release is done via GitHub actions on tag, run the following commands:
-
-```bash
-git clean -fdx && find . -name '*.pyc' -delete
-python3 -m venv venv
-source venv/bin/activate
-pip3 install twine wheel setuptools
-python setup.py sdist --formats=gztar bdist_wheel
-twine upload dist/*
-```
-
-6. Push the tag.
+5. Push the tag.
 
 ## Post release
 
@@ -28,7 +17,7 @@ twine upload dist/*
 Move back to a dev version with `tbump`:
 
 ```bash
-tbump X.Y.Z-dev0 --no-tag --no-push
+tbump X.Y.Z-dev0 --no-tag --no-push # You can interrupt during copyrite
 ```
 
 Check the result and then upgrade the master branch