add sonarcloud scan

.github/workflows/sonarcloud.yaml

@@ -0,0 +1,52 @@
+---
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  "sonarcloud":
+    runs-on: "ubuntu-latest"
+    env:
+      SONAR_SCANNER_VERSION: "4.7.0.2747" # https://docs.sonarcloud.io/advanced-setup/ci-based-analysis/sonarscanner-cli/
+      SONAR_SERVER_URL: "https://sonarcloud.io"
+      BUILD_WRAPPER_OUT_DIR: "build_wrapper_output_directory"
+    steps:
+      - uses: "actions/checkout@v2"
+        with:
+          fetch-depth: 0
+      - uses: "actions/setup-java@v1"
+        with:
+          java-version: 11
+      - name: "Cache SonarCloud packages"
+        uses: "actions/cache@v1"
+        with:
+          path: "~/.sonar/cache"
+          key: "${{ runner.os }}-sonar"
+          restore-keys: "${{ runner.os }}-sonar"
+      - name: "Download and set up sonar-scanner"
+        env:
+          SONAR_SCANNER_DOWNLOAD_URL: "https://binaries.sonarsource.com/Distribution/sonar-scanner-cli/sonar-scanner-cli-${{ env.SONAR_SCANNER_VERSION }}-linux.zip"
+        run: |
+          mkdir -p $HOME/.sonar
+          curl -sSLo $HOME/.sonar/sonar-scanner.zip ${{ env.SONAR_SCANNER_DOWNLOAD_URL }} 
+          unzip -o $HOME/.sonar/sonar-scanner.zip -d $HOME/.sonar/
+          echo "$HOME/.sonar/sonar-scanner-${{ env.SONAR_SCANNER_VERSION }}-linux/bin" >> $GITHUB_PATH
+      - name: "Download and set up build-wrapper"
+        env:
+          BUILD_WRAPPER_DOWNLOAD_URL: "${{ env.SONAR_SERVER_URL }}/static/cpp/build-wrapper-linux-x86.zip"
+        run: |
+          curl -sSLo $HOME/.sonar/build-wrapper-linux-x86.zip ${{ env.BUILD_WRAPPER_DOWNLOAD_URL }}
+          unzip -o $HOME/.sonar/build-wrapper-linux-x86.zip -d $HOME/.sonar/
+          echo "$HOME/.sonar/build-wrapper-linux-x86" >> $GITHUB_PATH
+      - name: "Run build-wrapper"
+        run: |
+          mkdir build
+          cmake -S . -B build
+          build-wrapper-linux-x86-64 --out-dir ${{ env.BUILD_WRAPPER_OUT_DIR }} cmake --build build/ --config Release
+      - name: "Run sonar-scanner"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          SONAR_TOKEN: "${{ secrets.SONAR_TOKEN }}"
+        run: |
+          sonar-scanner --define sonar.host.url="${{ env.SONAR_SERVER_URL }}" --define sonar.cfamily.build-wrapper-output="${{ env.BUILD_WRAPPER_OUT_DIR }}"

sonar-project.properties

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+sonar.projectKey=cmosher01_Epple-II
+sonar.organization=cmosher01
+sonar.sources=src
+sonar.sourceEncoding=UTF-8