make_coverage.sh.in

#!/bin/bash -e
#######################################################################################################################
#
# Shell script for generating a code coverage report.
#
# Parameter to be set inside the CMake project:
# EXCLUDE_FROM_COVERAGE (optional) Space separated list of directories in you source code which are excluded from the
#                                  coverage report.
#
# CMAKE_SOURCE_DIR and PROJECT_BINARY_DIR are always automatically there.
#
#######################################################################################################################

#######################################################################################################################
#
# IMPORTANT NOTE:
#
# DO NOT MODIFY THIS FILE inside a project. Instead update the project-template repository and pull the change from
# there. Make sure to keep the file generic, since it will be used by other projects, too.
#
# If you have modified this file inside a project despite this warning, make sure to cherry-pick all your changes
# into the project-template repository immediately.
#
#######################################################################################################################

rm -f `find . -name "*\.gcda"`
make test
lcov --capture --directory . --output-file coverage_all.info

#lcov capture also includes external stuff like glibc, boost etc.
#only extract the reports for this project
lcov --extract coverage_all.info "@CMAKE_SOURCE_DIR@*" -o coverage_only_source_tree.info --ignore-errors gcov

#Some parts of the source code might be excluded. Set EXCLUDE_FROM_COVERAGE to contain 
# a list of directories to be excluded from the coverage report.
# Don't worry if this is empty. It just means there is nothing to exclude (the normal case).
for exclude_dir in @EXCLUDE_FROM_COVERAGE@; do 
    echo lcov --remove coverage_only_source_tree.info "@CMAKE_SOURCE_DIR@/${exclude_dir}*" -o tmp.info
    lcov --remove coverage_only_source_tree.info "@CMAKE_SOURCE_DIR@/${exclude_dir}*" -o tmp.info
    mv tmp.info coverage_only_source_tree.info
done

#Some projects install the library and its headers for testing in the build directory
#and compile tests and examples against it. This leads to double
#counting and untested lines in the coverage report. That's why we
#exclude the build directory from the coverage report (needed if the
#build directory is in the source tree).
#Attention: If you make an 'in sorce build' the coverage report will
#be empty!
lcov --remove coverage_only_source_tree.info "@PROJECT_BINARY_DIR@/*" -o coverage.info

#finally generate the html page
genhtml coverage.info --output-directory coverage_html