add release.yml

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: Package Release
+
+on:
+  - release
+
+jobs:
+  release:
+    name: Publish to official pypi
+    runs-on: ${{ matrix.os }}
+    if: ${{ github.repository == 'HansBug/plantumlcli' }}
+    strategy:
+      matrix:
+        os:
+          - 'ubuntu-18.04'
+        python-version:
+          - '3.8'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 20
+      - name: Set up python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Set up python dependences
+        run: |
+          pip install --upgrade pip
+          pip install --upgrade flake8 setuptools wheel twine
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          if [ -f requirements-test.txt ]; then pip install -r requirements-test.txt; fi
+          pip install --upgrade build
+      - name: Build packages
+        run: |
+          python -m build --sdist --wheel --outdir dist/
+      - name: Publish distribution 📦 to real PyPI
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.PYPI_PASSWORD }}