publish to pypi only if PEP8 compliance passes

Author: ciur

.github/workflows/actions.yml

@@ -2,7 +2,7 @@ name: github-actions
 on: [push]
 jobs:
   check-pep8-compliance:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 3.7
@@ -11,18 +11,23 @@ jobs:
           python-version: 3.7
       - name: Install dependencies
         run: |
-          python -m pip install build --user --upgrade pip
+          python -m pip install --user --upgrade pip
           pip install pycodestyle
       - name: Validate PEP8 compliance
         run: pycodestyle .
-      - name: Build a binary wheel and a source tarball
-        run: >-
-          python -m
-          build
-          --sdist
-          --wheel
-          --outdir dist/
-          .
+
+  publish-to-pypi:
+    need: [check-pep8-compliance]
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+      - name: Install dependencies
+        run: |
+          python -m pip install build --user --upgrade pip
       - name: Publish 📦 to PyPI
         if: startsWith(github.ref, 'refs/tags')
         uses: pypa/gh-action-pypi-publish@master