GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
case $step in
true) echo -n $cmd $cmdsource $cmddest" ?"
read ans
case $ans in
n*) exit 0;;
q*) exit 1;;
esac;;
*) case $verbose in
true) echo RUNNING: $cmd $cmdsource $cmddest
esac;;
esac
eval $cmd $cmdsource $cmddest || exit 1
exit 0