Introduce GitHub Actions config.

.github/workflows/main.yml

@@ -0,0 +1,58 @@
+# For documentation please refer to:
+#   https://docs.github.com/en/free-pro-team@latest/actions
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  black-check:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.8'
+      - name: Cache Tox
+        uses: actions/cache@v2
+        with:
+          path: $HOME/.cache/pip
+          key: ${{ runner.os }}-tox
+      - run: pip install tox>=3
+      - run: tox -e black-check
+  clang-tidy:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache Snap
+        uses: actions/cache@v2
+        with:
+          path: /var/lib/snapd/
+          key: ${{ runner.os }}-snap
+      - name: Install CMake 3.19
+        run: sudo snap install cmake --channel=3.19/stable --classic
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y clang-tools
+      - run: cmake .
+      - run: make clang-tidy
+  clang-format-check:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache Snap
+        uses: actions/cache@v2
+        with:
+          path: /var/lib/snapd/
+          key: ${{ runner.os }}-snap
+      - name: Install CMake 3.19
+        run: sudo snap install cmake --channel=3.19/stable --classic
+      - run: |
+         sudo apt-get update
+         sudo apt-get install -y clang-tools
+      - run: cmake .
+      - run: make clang-format-check