Add CodeQL analysis as CI task

YAML configuration based on GitHub's auto-generated configuration file.

Author: tautschnig

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,49 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ develop ]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp', 'java', 'javascript', 'python' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    - run: |
+        sudo apt-get update
+        sudo apt-get install --no-install-recommends -yq maven flex bison
+        make -C src minisat2-download
+        make -C src       -j2
+        make -C unit      -j2
+        make -C jbmc/src  -j2
+        make -C jbmc/unit -j2
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1