Add code coverage ignore file (#279)

Signed-off-by: youhy <haoyuan2019@outlook.com>
Signed-off-by: Jenn Nguyen <jenn@openrobotics.org>

Co-authored-by: Jenn Nguyen <jenn@openrobotics.org>

cmake/IgnCodeCoverage.cmake

@@ -120,6 +120,17 @@ FUNCTION(ign_setup_target_for_coverage)
     MESSAGE(FATAL_ERROR "genhtml not found! Aborting...")
   ENDIF() # NOT GENHTML_PATH
 
+  # Read ignore file list
+  if (EXISTS "${PROJECT_SOURCE_DIR}/coverage.ignore.in")
+    configure_file("${PROJECT_SOURCE_DIR}/coverage.ignore.in"
+                    ${PROJECT_BINARY_DIR}/coverage.ignore)
+    file (STRINGS "${PROJECT_BINARY_DIR}/coverage.ignore" IGNORE_LIST_RAW)
+    string(REGEX REPLACE "([^;]+)" "'${PROJECT_SOURCE_DIR}/\\1'" IGNORE_LIST "${IGNORE_LIST_RAW}")
+    message(STATUS "Ignore coverage additions: " ${IGNORE_LIST})
+  else()
+    set(IGNORE_LIST "")
+  endif()
+
   # Setup target
   ADD_CUSTOM_TARGET(${_targetname}
 
@@ -132,8 +143,8 @@ FUNCTION(ign_setup_target_for_coverage)
     # Remove negative counts
     COMMAND sed -i '/,-/d' ${_outputname}.info
     COMMAND ${LCOV_PATH} ${_branch_flags} -q
-      --remove ${_outputname}.info '*/test/*' '/usr/*' '*_TEST*' '*.cxx' 'moc_*.cpp' 'qrc_*.cpp' '*.pb.*' --output-file ${_outputname}.info.cleaned
-    COMMAND ${GENHTML_PATH} ${_branch_flags} -q
+      --remove ${_outputname}.info '*/test/*' '/usr/*' '*_TEST*' '*.cxx' 'moc_*.cpp' 'qrc_*.cpp' '*.pb.*' '*/build/*' '*/install/*' ${IGNORE_LIST} --output-file ${_outputname}.info.cleaned
+    COMMAND ${GENHTML_PATH} ${_branch_flags} -q --prefix ${PROJECT_SOURCE_DIR}
     --legend -o ${_outputname} ${_outputname}.info.cleaned
     COMMAND ${LCOV_PATH} --summary ${_outputname}.info.cleaned 2>&1 | grep "lines" | cut -d ' ' -f 4 | cut -d '%' -f 1 > ${_outputname}/lines.txt
     COMMAND ${LCOV_PATH} --summary ${_outputname}.info.cleaned 2>&1 | grep "functions" | cut -d ' ' -f 4 | cut -d '%' -f 1 > ${_outputname}/functions.txt