rmbuild.sh

#!/bin/bash
#hi
SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
for rootFolder in */ ; do
    if [ -d $rootFolder"build" ]; then
        echo "do you want to delete build folders of \"${rootFolder%?}\" project?"
        read ans
        if [ "$ans" = "y" ] || [ "$ans" = "Y" ]; then 

            rm -rf $rootFolder"build"

            for innerFolder in $rootFolder*/ ; do
                if [ -d $innerFolder"build" ]; then        
                    rm -rf $innerFolder"build"
                fi;  
            done
        fi
    fi
done
IFS=$SAVEIFS