#!/usr/bin/env bash

#
# shoal(1) -- Print all the non-wildcard Host names (first one per line) from
# an ssh_config(5) file, defaulting to $HOME/.ssh/config.
#
# Author: Tom Ryder <tom@sanctum.geek.nz>
# Copyright: 2014
# License: Public domain
#

# Name self
self=shoal

while read -r option value _ ; do
    if [[ $option == 'Host' && $value != *[^[:alnum:]._-]* ]] ; then
        printf '%s\n' "$value"
    fi
done < "${1:-$HOME/.ssh/config}"