nixpkgs/pkgs/build-support/setup-hooks/make-coverage-analysis-report.sh

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postPhases+=" coverageReportPhase"
coverageReportPhase() {
lcov --directory . --capture --output-file app.info
set -o noglob
lcov --remove app.info ${lcovFilter:-"/nix/store/*"} > app2.info
set +o noglob
mv app2.info app.info
mkdir -p $out/coverage
genhtml app.info $lcovExtraTraceFiles -o $out/coverage > log
# Grab the overall coverage percentage so that Hydra can plot it over time.
mkdir -p $out/nix-support
lineCoverage="$(sed 's/.*lines\.*: \([0-9\.]\+\)%.*/\1/; t ; d' log)"
functionCoverage="$(sed 's/.*functions\.*: \([0-9\.]\+\)%.*/\1/; t ; d' log)"
if [ -z "$lineCoverage" -o -z "$functionCoverage" ]; then
echo "failed to get coverage statistics"
exit 1
fi
echo "lineCoverage $lineCoverage %" >> $out/nix-support/hydra-metrics
echo "functionCoverage $functionCoverage %" >> $out/nix-support/hydra-metrics
echo "report coverage $out/coverage" >> $out/nix-support/hydra-build-products
}