ci: add flake8 linting

Author: alexfikl

.github/workflows/main.yaml

@@ -0,0 +1,37 @@
+name: CI
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    # 17:00 on Friday (UTC)
+    - cron: "00 17 * * 5"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+      fail-fast: False
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install
+      run: make ci-install
+
+    - name: Run tests, mypy and linting
+      run: make ci-test
+      shell: bash

Makefile

@@ -0,0 +1,17 @@
+PYTHON=python
+
+all: help
+
+help: 								## Show this help
+	@echo -e "Specify a command. The choices are:\n"
+	@grep -E '^[0-9a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[0;36m%-18s\033[m %s\n", $$1, $$2}'
+	@echo ""
+.PHONY: help
+
+ci-install:
+	make -C papis-html ci-install
+.PHONY: ci-install
+
+ci-test:
+	make -C papis-html ci-lint
+.PHONY: ci-test