Add CodeCov

Author: diffstorm

.github/workflows/c-cpp.yml

@@ -2,16 +2,15 @@ name: CI
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [main]
   pull_request:
-    branches: [ "main" ]
+    branches: [main]
 
 env:
   BUILD_TYPE: Release
 
 jobs:
-  build:
-
+  build-and-test:
     runs-on: ubuntu-latest
 
     env:
@@ -23,17 +22,32 @@ jobs:
     - name: Install dependencies
       run: |
         sudo apt-get update
-        sudo apt-get install -y build-essential cmake libgtest-dev googletest
-
-    - name: Create build directory
-      run: mkdir build
+        sudo apt-get install -y build-essential cmake lcov
+        sudo apt-get install -y libgtest-dev googletest
 
     - name: Configure CMake
-      run: cmake -B ${{github.workspace}}/build
+      run: |
+        cmake -B build -DCMAKE_BUILD_TYPE=Debug \
+          -DCMAKE_CXX_FLAGS="-fprofile-arcs -ftest-coverage -fprofile-update=atomic -O0"
 
     - name: Build
-      run: cmake --build ${{github.workspace}}/build
+      run: cmake --build build --clean-first
 
-    - name: Run Unit Tests
-      working-directory: ${{github.workspace}}/build
+    - name: Run Tests
+      working-directory: ./build
       run: ./test/flexitimerTest
+
+    - name: Generate Coverage Report
+      run: |
+        lcov --capture --directory ./build --output-file coverage.info \
+             --rc geninfo_unexecuted_blocks=1 \
+             --ignore-errors mismatch,negative
+        lcov --remove coverage.info '/usr/*' --output-file coverage.info
+        lcov --list coverage.info || true  # Prevent failure on warnings
+
+    - name: Upload to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        file: coverage.info
+        fail_ci_if_error: false

README.md

@@ -3,6 +3,7 @@
 [![Build Status](https://github.com/diffstorm/flexitimer/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/diffstorm/flexitimer/actions)
 [![License](https://img.shields.io/github/license/diffstorm/flexitimer)](https://github.com/diffstorm/flexitimer/blob/main/LICENSE)
 [![Language](https://img.shields.io/github/languages/top/diffstorm/flexitimer)](https://github.com/diffstorm/flexitimer)
+[![Code Coverage](https://codecov.io/gh/diffstorm/flexitimer/branch/main/graph/badge.svg)](https://codecov.io/gh/diffstorm/flexitimer)
 ![GitHub Stars](https://img.shields.io/github/stars/diffstorm/flexitimer?style=social)
 ![Platforms](https://img.shields.io/badge/Platform-Linux%20%7C%20Windows%20%7C%20macOS-lightgrey)