ENH: Enable auto PyPI release and allow skipping CI

.github/workflows/ci_workflows.yml

@@ -9,8 +9,25 @@ on:
       - master
 
 jobs:
+  cancel_ci:
+    name: Mandatory checks before CI
+    runs-on: ubuntu-latest
+    outputs:
+      run_next: ${{ steps.skip_ci_step.outputs.run_next }}
+    steps:
+    - name: Check skip CI
+      uses: OpenAstronomy/action-skip-ci@main
+      id: skip_ci_step
+      with:
+        NO_FAIL: true
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  # The rest only run if above are done
+
   pep_and_audit:
     runs-on: ubuntu-16.04
+    needs: cancel_ci
+    if: needs.cancel_ci.outputs.run_next == 'true'
     steps:
     - name: Checkout code
       uses: actions/checkout@v2
@@ -38,6 +55,8 @@ jobs:
   # Python 3.7 + Numpy 1.19 resulted in NaN results, so we downgrade Numpy.
   initial_tests:
     runs-on: ubuntu-16.04
+    needs: cancel_ci
+    if: needs.cancel_ci.outputs.run_next == 'true'
     steps:
     - name: Checkout code
       uses: actions/checkout@v2
@@ -60,6 +79,8 @@ jobs:
 
   dev_deps_tests:
     runs-on: ubuntu-latest
+    needs: cancel_ci
+    if: needs.cancel_ci.outputs.run_next == 'true'
     steps:
     - name: Checkout code
       uses: actions/checkout@v2

.github/workflows/publish.yml

@@ -0,0 +1,38 @@
+name: Release
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  build-n-publish:
+    name: Build and publish Python 🐍 distributions 📦 to PyPI
+    runs-on: ubuntu-latest
+    if: github.repository == 'spacetelescope/exovetter'
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+
+    - name: Install python-build and twine
+      run: python -m pip install build "twine>=3.3"
+
+    - name: Build package
+      run: python -m build --sdist --wheel .
+
+    - name: List result
+      run: ls -l dist
+
+    - name: Check dist
+      run: python -m twine check --strict dist/*
+
+    - name: Publish distribution 📦 to PyPI
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_TOKEN }}