Print an eighty-character line to the terminal

print-line.sh

#! /usr/bin/env bash
#>------------------------------------------------------------------------------
#>
#> [ print-line ]
#>
#>    Print an eighty-character line to the terminal.
#>
#>    No inputs are required when invoking this script.
#>
#>    Printed lines will default to being constructed with dashes (-) but can
#>    be customized by passing a desired character as an input.
#>
#> USAGE:
#>
#>    ./print-line.sh <INPUT>
#>    ./print-line.sh <OPTION>
#>
#>    where "INPUT" is some optional input character; and where "OPTION" is an
#>    optional parameter of the following:
#>
#>                |
#>    -h, --help  | Print this help text to the terminal
#>                |
#>
#> ATTRIBUTION:
#>
#>    Created on 20201031 by h8rt3rmin8r ([email protected])
#>
#>    Source:
#>    https://gist.github.com/h8rt3rmin8r/0e7b8a191947c76ec5ec90dc6b9577b4
#>
#>------------------------------------------------------------------------------

function _help() {
    cat "${0}" \
        | grep -E '^#[>]' \
        | sed 's/^..//'
    
    return $?
}

function _run() {
    printf "%080d\n" 0 \
        | tr '0' "${_x}"

    return $?
}

_x="-"

if [[ "${1}" =~ ^[-][hH]$ || "${1}" =~ ^[-]+help$ ]]; then
    _help
else
    if [[ ! "x${1}" == "x" ]]; then
        _x="${1:0:1}"
    fi

    _run
fi

exit $?