🚧 GitHub Actions: Add release workflow

.github/workflows/release-check-version-tag

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+#!/bin/bash
+
+# We call setuptools.setup() here as we may rely on setuptools to interpret
+# a dynamic version field. (Reading pyproject.toml is not enough in that case.)
+expected_git_tag="v$(python -c 'from setuptools import setup; setup()' --version)"
+actual_git_tag="$(git describe --tags)"
+
+if [[ "$expected_git_tag" == "$actual_git_tag" ]]; then
+  echo "OK: Python package version $expected_git_tag matches git tag"
+  exit 0
+else
+  echo "ERROR: Python package version $expected_git_tag does NOT match git tag $actual_git_tag"
+  exit 1
+fi

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+env:
+  PYPI_URL: https://pypi.org/p/dinglehopper
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Check git tag vs package version
+        run: python3 -m pip install --upgrade setuptools && .github/workflows/release-check-version-tag
+      - name: Build package
+        run: python3 -m pip install --upgrade build && python3 -m build
+      - name: Test
+        run: python3 -m pip install -r requirements-dev.txt && pytest
+      - name: Upload dist
+        uses: actions/upload-artifact@v3
+        with:
+          name: dist
+          path: dist/
+
+  github-release:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download dist
+        uses: actions/download-artifact@v3
+        with:
+          name: dist
+          path: dist/
+      - name: Create release on GitHub
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*
+
+  pypi-publish:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: ${{ env.PYPI_URL }}
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
+    steps:
+      - name: Download dist
+        uses: actions/download-artifact@v3
+        with:
+          name: dist
+          path: dist/
+      - name: Publish package distributions to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1