Add basic CI configuration

Author: lagru

.github/workflows/ci.yml

@@ -0,0 +1,83 @@
+name: CI
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  # Many color libraries just need this to be set to any value, but at least
+  # one distinguishes color depth, where "3" -> "256-bit color".
+  FORCE_COLOR: 3
+
+jobs:
+  pre-commit:
+    name: pre-commit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - uses: pre-commit/action@v3.0.1
+        with:
+          extra_args: --hook-stage manual --all-files
+
+  checks:
+    name: Test with Python ${{ matrix.python-version }} on ${{ matrix.runs-on }}
+    runs-on: ${{ matrix.runs-on }}
+    needs: [pre-commit]
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.13"]
+        runs-on: [ubuntu-latest, windows-latest, macos-14]
+        include:
+          - python-version: "pypy-3.10"
+            runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
+
+      - name: Install package
+        run: python -m pip install .[test,optional]
+
+      - name: Run pytest
+        run: >-
+          python -m pytest -ra --cov --cov-report=xml --cov-report=term
+          --durations=20
+
+      - name: Upload coverage report
+        uses: codecov/codecov-action@v4.5.0
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Compare example stubs
+        run: |
+          python -m docstub -v example/example_pkg
+          git diff --exit-code example/
+
+      - name: Generate docstub stubs
+        run: |
+          python -m docstub -v src/docstub
+
+      - name: Upload docstub stubs
+        uses: actions/upload-artifact@v4
+        with:
+          name: docstub-stubs
+          path: ./src/docstub-stubs