create dynamic warning s and flags in xcode From http://stackoverflow.com/questions/24183812/swift-warning-equivalent
if [ "${CONFIGURATION}" = "Debug" ]; then
TAGS="TODO:|FIXME:"
echo "searching ${SRCROOT} for ${TAGS}"
find "${SRCROOT}" \( -name "*.swift" \) -print0 | xargs -0 egrep --with-filename --line-number --only-matching "($TAGS).*\$" | perl -p -e "s/($TAGS)/ warning: \$1/"
fi