Add pre-commit with pylint check (#3)

This PR sets up pre-commit for a smooth developer flow:
- Adds pre-commit with a pylint check
  We can extend this further with additional checks.
- Fix the issues detected by the pylint check
- Add a github action to run pre-commit on each PR and on merges to main

.github/workflows/pipeline.yaml

@@ -0,0 +1,25 @@
+name: Test pipeline
+on:
+ push:
+ branches:
+ - main
+ pull_request:
+jobs:
+ test:
+ runs-on: ubuntu-latest
+ strategy:
+ matrix:
+ python-version: ['3.8', '3.9', '3.10', '3.11']
+ steps:
+ - uses: actions/checkout@v2
+ - name: Set up Python ${{ matrix.python-version }}
+ uses: actions/setup-python@v2
+ with:
+ python-version: ${{ matrix.python-version }}
+ - name: Install dependencies
+ run: |
+ pip install --upgrade pip
+ pip install poetry==1.4.0
+ poetry install
+ - name: Test with pre-commit
+ run: poetry run pre-commit run --all-files --show-diff-on-failure

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+ci:
+ autoupdate_branch: "main"
+ autoupdate_schedule: monthly
+repos:
+ - repo: local
+ hooks:
+ - id: pylint
+ name: pylint
+ entry: pylint
+ language: system
+ types: [python]
+ files: "^express/"
+ args:
+ [
+ "-rn", # Only display messages
+ "-sn", # Don't display the score
+ "--disable=fixme"
+ ]