infra: Dedicated code format check workflow (#161)

.github/workflows/check-format.yml

@@ -0,0 +1,28 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Check code format
+
+on:
+  pull_request:
+    branches:
+      - main
+      - feature/**
+
+jobs:
+  check-code-format:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        pip install --upgrade pip
+        pip install -e .[test]
+    - name: Run code format checks
+      run: |
+        black --check .
+        flake8

.github/workflows/python-package.yml

@@ -11,7 +11,6 @@ on:
 
 jobs:
   build:
-
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -28,11 +27,6 @@ jobs:
       run: |
         pip install --upgrade pip
         pip install -e .[test]
-    - name: Check code format
-      run: |
-        # stop the build if there are Python format errors or undefined names
-        black --check .
-        flake8
     - name: Run unit tests
       run: |
         tox -e unit-tests