Simplify code coverage implementation

test/CMakeLists.txt

@@ -4,4 +4,19 @@ add_subdirectory(common)
 
 add_custom_target(check
     WORKING_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}
-    COMMAND ${CMAKE_SOURCE_DIR}/test/runner)
+    COMMAND ${CMAKE_SOURCE_DIR}/test/runner "${CMAKE_BINARY_DIR}")
+
+if(enable-coverage)
+    find_program(GCOV_PATH gcov)
+    find_program(LCOV_PATH lcov)
+    find_program(GENHTML_PATH genhtml)
+    if(NOT GCOV_PATH)
+        MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
+    endif()
+    if(NOT LCOV_PATH)
+        MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
+    endif()
+    if(NOT GENHTML_PATH)
+        MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
+    endif()
+endif()

test/runner

@@ -8,4 +8,17 @@ do
     ret+=$?
 done
 
+if grep 'enable-coverage:BOOL=YES' "$1/CMakeCache.txt"
+then
+    echo "Generating coverage reports"
+    rm -rf "$1/coverage"
+    mkdir "$1/coverage"
+    lcov --directory "$1" \
+        --capture \
+        --output-file "$1/coverage/lcov.info"
+    lcov --remove "$1/coverage/lcov.info" 'test/*' '/usr/*' \
+        --output-file "$1/coverage/lcov.info.clean"
+    genhtml -o "$1/coverage/" "$1/coverage/lcov.info.clean"
+fi
+
 exit $ret