experiment enabling github code analysis with codeql

Author: yashbhutwala

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,58 @@
+# https://github.com/github/codeql-action
+# https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning
+
+name: "code-scanning"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '0 15 * * 0'
+
+jobs:
+  CodeQL-Build:
+    # CodeQL runs on ubuntu-latest, windows-latest, and macos-latest
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          # Must fetch at least the immediate parents so that if this is
+          # a pull request then we can checkout the head of the pull request.
+          # Only include this option if you are running this workflow on pull requests.
+          fetch-depth: 2
+
+      # If this run was triggered by a pull request event then checkout
+      # the head of the pull request instead of the merge commit.
+      # Only include this step if you are running this workflow on pull requests.
+      - run: git checkout HEAD^2
+        if: ${{ github.event_name == 'pull_request' }}
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        # Override language selection by uncommenting this and choosing your languages
+        # with:
+        #   languages: go, javascript, csharp, python, cpp, java
+
+      # Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below).
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v1
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
+
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following
+      #    three lines and modify them (or add more) to build your code if your
+      #    project uses a compiled language
+
+      #- run: |
+      #   make bootstrap
+      #   make release
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1