make slug out of title. slugify.bash 'Surface to Air: The Brand Givenchy and Vuitton Hire to Stay Cool' 24

slugify.bash

#!/bin/bash

title="$1"
max_length="${2:-48}"
slug="$({
    tr '[A-Z]' '[a-z]' | tr -cs '[[:alnum:]]' '-'
} <<< "$title")"
slug="${slug##-}"
slug="${slug%%-}"
slug="${slug:0:$max_length}"
echo "$slug"