[ci] Add separate codecov GH action

.github/workflows/codecov.yaml

@@ -0,0 +1,23 @@
+name: ReFrame CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Code coverage
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '3.12'
+    - name: Bootstrap reframe
+      run: ./bootstrap.sh
+    - name: Run tests and collect coverage
+      run: |
+        pip install pytest-cov
+        ./test_reframe.py --cov=reframe --cov-report=xml
+    - name: Upload coverage reports
+      uses: codecov/[email protected]
+      # env:
+      #   CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/main.yml

@@ -18,15 +18,8 @@ jobs:
       run: |
         ./bootstrap.sh
     - name: Generic Unittests
-      if: matrix.python-version != '3.8'
       run: |
         ./test_reframe.py
-    - name: Generic Unittests and Coverage Report
-      if:  matrix.python-version == '3.8'
-      run: |
-        python -m pip install coverage
-        coverage run --source=reframe ./test_reframe.py
-        coverage report -m
 
   unittest-py36:
     runs-on: ubuntu-20.04

reframe/__init__.py

@@ -22,5 +22,5 @@
 
 
 # Import important names for user tests
-from reframe.core.pipeline import *     # noqa: F401, F403
-from reframe.core.decorators import *   # noqa: F401, F403
+from reframe.core.pipeline import *     # noqa: F401, F403, E402
+from reframe.core.decorators import *   # noqa: F401, F403, E402