feat: add black, flake config and pre-commit

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+max-complexity = 10
+select = E9,F63,F7,F82

.github/workflows/python-test.yml

@@ -22,14 +22,12 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pytest coverage
+          pip install pipenv==v2021.5.29
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          pipenv install --dev --deploy
-      - name: Lint with flake8
+      - name: Lint with black and flake
         run: |
-          # stop the build if there are Python syntax errors or undefined names
+          black --check icalevents
-          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          flake8 . --count --exit-zero
-          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
       - name: Test with pytest
         run: |
           coverage run test.py

.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+ci:
+  skip: [pylint]
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.3.0
+    hooks:
+      - id: check-yaml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+  - repo: https://github.com/psf/black
+    rev: 21.9b0
+    hooks:
+      - id: black
+        args: ['--check']
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.7.9
+    hooks:
+      - id: flake8