Ubuntu "alert" alias as function

alert.sh

#!/bin/bash
# You can source this script to get the "alert" function.

function alert {
    # Alert after a long running command.
    # Use like so: "sleep 2; alert"

    local exit=$?  # Must go first!
    local img=terminal
    local msg="$(fc -nl -1 | sed -e 's/^\s\+//; s/\s*[;&|]\s*alert$//')"

    [[ $exit -ne 0 ]] && img=error

    notify-send --urgency=low -i "$img" -- "$msg"
}