lint: add workflow

Add the lint workflow which executes flake8 and isort.

.github/workflows/lint.yml

@@ -0,0 +1,22 @@
+name: flake8
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements-test.txt ]; then pip install -r requirements-test.txt; fi
+      - name: Make lint
+        run: |
+          make lint

Makefile

@@ -1,6 +1,17 @@
 index.html : README.md static/skeleton.css static/box.svg static/template.html
 	pandoc -s README.md -o index.html -c static/skeleton.css --template static/template.html -T mkrepo
 
+.PHONY: lint
+lint: flake8 isort
+
+.PHONY: flake8
+flake8:
+	flake8 .
+
+.PHONY: isort
+isort:
+	isort . -c
+
 test :
 	PYTHONPATH=$(PWD)/test python -m unittest discover -v
 

requirements-test.txt

@@ -0,0 +1,2 @@
+flake8>=3.7.9
+isort>=5.9.3