urlgrep


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#!/bin/sh

# Find all URLs in stdin, print them newline-separated to stdout

protocols='http|https|ftp|sftp|gemini|mailto'
valid_chars="][a-zA-Z0-9_~/?#@!$&'()*+=.,;:-"
regex="(($protocols):|www\.)[$valid_chars]+"

egrep -o "$regex"