parameter=$1
keep_backup=1

install() {
    if [[ $parameter == "all" ]] || [[ $parameter == $1 ]]; then
        echo "Installing $1 config in $2"
        if [[ $keep_backup -eq 1 ]]; then
            rm -rf $2_backup
            mv $2 $2_backup
        else
            rm -rf $2
        fi
        cp -rf $1 $2
    fi
}

if [[ $parameter == '' ]]; then
    echo "No config specified, the following configs are available:"
    echo "  all - all of the config files"
    while read name path; do
        echo "  $name"
    done <configs
    exit
fi

read -p "Do you want to back up your old config files? (y/n) " yn
case $yn in
[Nn]*)
    keep_backup=0
    break
    ;;
[Yy]*)
    keep_backup=1
    break
    ;;
*)
    echo "Unknown answer, treating it as yes"
    keep_backup=1
    break
    ;;
esac

while read name path; do
    eval "name=$name" # re-evaluate the string as a path
    eval "path=$path" # re-evaluate the string as a path
    install $name $path
done <configs