fix: CPU cores validation logic (#1044)

if grep -qi "socket(s)" <<< "$(lscpu)"; then

  SOCKETS=$(lscpu | grep -m 1 -i 'socket(s)' | awk '{print $2}')

  [ "$SOCKETS" -lt "1" ] && SOCKETS=1

  [ -z "${SOCKETS##*[!0-9]*}" ] && SOCKETS=1

  [ "$SOCKETS" -lt "1" ] && SOCKETS=1

fi

CPU_CORES="${CPU_CORES// /}"

[ -z "$CPU_CORES" ] && CPU_CORES=2

[[ "${CPU_CORES,,}" == "max" ]] && CPU_CORES="$CORES"

[[ "${CPU_CORES,,}" == "half" ]] && CPU_CORES=$(( CORES / 2 ))

[ "$CPU_CORES" -lt "1" ] && CPU_CORES=1

[ -n "${CPU_CORES//[0-9 ]}" ] && error "Invalid amount of CPU_CORES: $CPU_CORES" && exit 15

[ -z "${CPU_CORES##*[!0-9]*}" ] && error "Invalid amount of CPU_CORES: $CPU_CORES" && exit 15

[ "$CPU_CORES" -lt "1" ] && CPU_CORES=1

if [ "$CPU_CORES" -gt "$CORES" ]; then

  warn "The amount for CPU_CORES (${CPU_CORES}) exceeds the amount of logical cores available, so will be limited to ${CORES}."

  warn "The amount for CPU_CORES (${CPU_CORES}) exceeds the amount of logical cores available (${CORES}) and will be limited."

  CPU_CORES="$CORES"

fi