Add the command_not_found_handle function

[benknoble]

Handles what happens when a command cannot be found.

Args: command_name [command_arg1 command_arg2 ...]

Exit status: 127

[benknoble]

Prototype:

function command_not_found_handle() {
    {
        echo -e "$BRed"Command not found: "$NC$BYellow$1$NC"
        shift
        if [[ $# > 0 ]]; then
            echo "$#" args: "$(join_by ', ' "${@@Q}")"
        fi
        echo -e Try "$BGreen"'`displayPath`'"$NC" to see the path
    } >&2
    return 127
}

function join_by { local d=$1; shift; echo -n "$1"; shift; printf "%s" "${@/#/$d}"; echo; }

join_by from here

[benknoble]

Consider conditionally defining it (so as not to override):

[[ "$(type -t command_not_found_handle)" = function ]] || # def function