Added coverity to ci

.github/workflows/coverity_scan.yml

@@ -0,0 +1,48 @@
+name: linux
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+  # your existing build matrix (unchanged)...
+
+  build_osx:
+  # your existing macOS build job (unchanged)...
+
+  coverity_scan:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    name: Coverity Scan
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y curl build-essential cmake pkg-config libsystemd-dev
+
+      - name: Download Coverity Tool
+        run: |
+          curl -s -L --output coverity_tool.tgz "https://scan.coverity.com/download/linux64?token=${{ secrets.COVERITY_TOKEN }}&project=gabime%2Fspdlog"
+          mkdir coverity_tool
+          tar -C coverity_tool --strip-components=1 -xf coverity_tool.tgz
+          echo "$PWD/coverity_tool/bin" >> $GITHUB_PATH
+
+      - name: Build with Coverity
+        run: |
+          mkdir build && cd build
+          cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_STANDARD=17
+          cd ..
+          cov-build --dir cov-int make -C build -j4
+
+      - name: Submit results to Coverity
+        run: |
+          tar czf cov-int.tgz cov-int
+          curl --form token="${{ secrets.COVERITY_TOKEN }}" \
+               --form file=@cov-int.tgz \
+               --form version="GitHub PR #${{ github.event.pull_request.number }}" \
+               --form description="CI run for PR" \
+               https://scan.coverity.com/builds?project=gabime%2Fspdlog