Add CodeQL

Author: evansims

.github/workflows/codeql.yml

@@ -0,0 +1,53 @@
+name: CodeQL
+
+on:
+  merge_group:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+  push:
+    branches:
+      - master
+  schedule:
+    - cron: "56 12 * * 1"
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [python]
+
+    steps:
+      - if: github.actor == 'dependabot[bot]' || github.event_name == 'merge_group'
+        run: exit 0 # Skip unnecessary test runs for dependabot and merge queues. Artifically flag as successful, as this is a required check for branch protection.
+
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+          queries: +security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{ matrix.language }}"