Ship release- branch of a non-draft PR to TestPyPI

Author: rayluo

.github/workflows/python-package.yml

@@ -65,7 +65,12 @@ jobs:
 
   cd:
     needs: ci
-    if: github.event_name == 'push' && (startsWith(github.ref, 'refs/tags') || github.ref == 'refs/heads/main')
+    if: |
+      github.event_name == 'push' &&
+      (
+        startsWith(github.ref, 'refs/tags') ||
+        startsWith(github.ref, 'refs/heads/release-')
+      )
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
@@ -77,14 +82,16 @@ jobs:
       run: |
         python -m pip install build --user
         python -m build --sdist --wheel --outdir dist/ .
-    - name: Publish to TestPyPI
+    - name: |
+        Publish to TestPyPI when pushing to release-* branch.
+        You better test with a1, a2, b1, b2 releases first.
       uses: pypa/gh-action-pypi-publish@v1.4.2
-      if: github.ref == 'refs/heads/main'
+      if: startsWith(github.ref, 'refs/heads/release-')
       with:
         user: __token__
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
-    - name: Publish to PyPI
+    - name: Publish to PyPI when tagged
       if: startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@v1.4.2
       with: