test: Ensure pilot fails keep compaibility with Python 2.7

Author: chrisburr

.github/workflows/basic.yml

@@ -88,3 +88,23 @@ jobs:
         ${{ matrix.command }}
       env:
         REFERENCE_BRANCH: ${{ github['base_ref'] || github['head_ref'] }}
+
+  pylint-py27:
+    name: Pylint for Python 2.7 in Pilot files
+    runs-on: ubuntu-latest
+    if: github.event_name != 'push' || github.repository == 'DIRACGrid/DIRAC'
+    steps:
+    - uses: actions/checkout@v2
+    - name: Fail-fast for outdated pipelines
+      run: .github/workflows/fail-fast.sh
+    - name: prepare environment
+      run: |
+        conda config --set add_pip_as_python_dependency false
+        conda create -c conda-forge -n test-env python=2.7 pylint=1.9.2 astroid=1.6.5
+    - name: run pilot wrapper test
+      run: |
+        eval "$(conda shell.bash hook)" && conda activate test-env
+        pylint -E \
+          tests/Integration/WorkloadManagementSystem/Test_GenerateAndExecutePilotWrapper.py \
+          src/DIRAC/WorkloadManagementSystem/Utilities/PilotWrapper.py \
+          src/DIRAC/Resources/Computing/BatchSystems/*.py

.pre-commit-config.yaml

@@ -22,3 +22,23 @@ repos:
     rev: 22.1.0
     hooks:
       - id: black
+        exclude: |
+          (?x)^(
+              src/DIRAC/Resources/Computing/BatchSystems/[^/]+.py|
+              src/DIRAC/WorkloadManagementSystem/Utilities/PilotWrapper.py|
+              tests/Integration/WorkloadManagementSystem/Test_GenerateAndExecutePilotWrapper.py
+          )$
+
+  - repo: https://github.com/psf/black
+    rev: 21.9b0
+    hooks:
+      - id: black
+        name: black for files with Python 2.7 compatibility
+        additional_dependencies: [".[python2]"]
+        args: ["--target-version=py27"]
+        files: |
+          (?x)^(
+              src/DIRAC/Resources/Computing/BatchSystems/[^/]+.py|
+              src/DIRAC/WorkloadManagementSystem/Utilities/PilotWrapper.py|
+              tests/Integration/WorkloadManagementSystem/Test_GenerateAndExecutePilotWrapper.py
+          )$