gcov coverage report

.github/workflows/build-firmware.yaml

@@ -1,6 +1,13 @@
 name: Build Firmware
 
-on: [push, pull_request, workflow_dispatch]
+on:
+  push:
+    branches:
+      - master
+      - prod-*
+  pull_request:
+  workflow_dispatch:
+
 
 jobs:
   build-firmware:

.github/workflows/tests.yaml

@@ -1,6 +1,12 @@
 name: Unit Tests
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - master
+      - prod-*
+  pull_request:
+  workflow_dispatch:
 
 jobs:
   build:
@@ -24,21 +30,40 @@ jobs:
       if: ${{ matrix.os != 'macos-latest' }}
       run: |
         sudo apt-get update
-        sudo apt-get install valgrind
+        sudo apt-get install valgrind python3-pip
+        pip install gcovr==8.5
 
     - name: Print Compiler version
       # NOTE: on mac, this is actually symlink'd to clang, not gcc, but that's ok - we want to build on both
       working-directory: .
       run: gcc -v
 
     - name: Build Tests
+      if: ${{ matrix.os != 'macos-latest' }}
+      working-directory: test
+      run: make -j4 SANITIZE=yes COVERAGE=yes
+
+    - name: Build Tests
+      if: ${{ matrix.os == 'macos-latest' }}
       working-directory: test
       run: make -j4 SANITIZE=yes
 
     - name: Run Tests
       working-directory: test
       run: ASAN_OPTIONS=detect_stack_use_after_return=1 build/wideband_test
 
+    - name: Generate Code Coverage
+      if: ${{ matrix.os != 'macos-latest' }}
+      working-directory: ./test/
+      run: ./ci_gcov.sh
+
+    - name: Upload code coverage artifacts
+      if: ${{ matrix.os != 'macos-latest' }}
+      uses: actions/upload-artifact@v6
+      with:
+        name: rusefi_wideband_code_coverage
+        path: ./test/gcov_working_area/gcov
+
     - name: Rebuild Tests For Valgrind
       # Valgrind isn't compatible with address sanitizer, so we have to rebuild the code
       if: ${{ matrix.os != 'macos-latest' }}

test/Makefile

@@ -50,6 +50,19 @@ ifeq ($(SANITIZE),)
 	endif
 endif
 
+ifeq ($(COVERAGE),yes)
+  ifeq ($(IS_CLANG),1)
+    COVERAGE_FLAGS := -fprofile-instr-generate -fcoverage-mapping
+    $(info Detected Clang: using LLVM-style coverage flags)
+  else
+    COVERAGE_FLAGS := --coverage
+    $(info Detected GCC: using GCC-style coverage flags)
+  endif
+  USE_COPT += $(COVERAGE_FLAGS)
+  USE_CPPOPT += $(COVERAGE_FLAGS)
+endif
+
+
 IS_MAC = no
 ifneq ($(OS),Windows_NT)
 	UNAME_S := $(shell uname -s)
@@ -198,6 +211,10 @@ ifeq ($(SANITIZE),yes)
 	ULIBS += -fsanitize=address -fsanitize=undefined
 endif
 
+ifeq ($(COVERAGE),yes)
+	ULIBS += $(COVERAGE_FLAGS)
+endif
+
 #
 # End of user defines
 ##############################################################################

test/ci_gcov.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+#
+# this script is used by github actions
+#
+
+rm -rf gcov_working_area
+
+mkdir gcov_working_area
+cd gcov_working_area
+mkdir gcov
+
+echo -e "\nGenerating rusEFI wideband unit test coverage"
+
+# for debug use --html-details --html-single-page --verbose  to generate a single html
+gcovr --exclude-throw-branches --exclude-unreachable-branches --decisions --merge-mode-functions=separate \
+      --exclude '/.*/googletest/' \
+      -j4  -r ../.. --html-nested gcov/index.html