migrate to pre-commit for linting+formatting (#415)

.github/workflows/ci.yaml

@@ -39,12 +39,8 @@ jobs:
       - name: Set Up Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.9.7"  # 3.9.8 crashes
-      - name: Install Nox Dependencies
-        run: |
-          python -m pip install poetry nox nox-poetry pyparsing==3.0.4
-      - name: Run Lint
-        run: nox --non-interactive --session lint -- --full-trace
+          python-version: "3.9"
+      - uses: pre-commit/[email protected]
 
   linkcheck:
     name: Docs-Linkcheck

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+repos:
+  - repo: https://github.com/psf/black
+    rev: 21.9b0
+    hooks:
+      - id: black
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.9.2
+    hooks:
+      - id: flake8
+        additional_dependencies:
+          - pep8-naming
+
+  - repo: https://github.com/pycqa/isort
+    rev: 5.9.3
+    hooks:
+      - id: isort

Makefile

@@ -6,7 +6,7 @@ list:
 
 .PHONY: lint
 lint:
-	poetry run flake8 ${SRC_FILES}
+	pre-commit run --all-files
 
 .PHONY: test
 test: