Add CodeQL (#31)

Author: trask

.github/workflows/codeql.yml

@@ -0,0 +1,53 @@
+name: CodeQL
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: "29 13 * * 2"  # weekly at 13:29 UTC on Tuesday
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    permissions:
+      contents: read
+      actions: read  # for github/codeql-action/init to get workflow details
+      security-events: write  # for github/codeql-action/analyze to upload SARIF results
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          # the nebula plugin used in this repo needs the tags
+          fetch-depth: 0
+
+      - name: Set up Java 17
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          distribution: temurin
+          java-version: 17
+
+      - name: Set up gradle
+        uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4.3.0
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@dd746615b3b9d728a6a37ca2045b68ca76d4841a # v3.28.8
+        with:
+          languages: java, actions
+          # using "latest" helps to keep up with the latest Kotlin support
+          # see https://github.com/github/codeql-action/issues/1555#issuecomment-1452228433
+          tools: latest
+
+      - name: Assemble
+        # --no-build-cache is required for codeql to analyze all modules
+        # --no-daemon is required for codeql to observe the compilation
+        # (see https://docs.github.com/en/code-security/codeql-cli/getting-started-with-the-codeql-cli/preparing-your-code-for-codeql-analysis#specifying-build-commands)
+        run: ./gradlew assemble --no-build-cache --no-daemon
+
+      - name: Perform CodeQL analysis
+        uses: github/codeql-action/analyze@dd746615b3b9d728a6a37ca2045b68ca76d4841a # v3.28.8

.github/workflows/main-build.yml

@@ -15,6 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
+          # the nebula plugin used in this repo needs the tags
           fetch-depth: 0
 
       - id: setup-java-17

.github/workflows/pr-build.yml

@@ -15,6 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
+          # the nebula plugin used in this repo needs the tags
           fetch-depth: 0
 
       - id: setup-java-17

.github/workflows/release-build.yml

@@ -19,6 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
+          # the nebula plugin used in this repo needs the tags
           fetch-depth: 0
 
       - id: setup-java-17