Connect to preconfigure ssh hosts (set in ~/.ssh/config) via simple list with numbers or by regex of the host name

sshhosts.sh

#!/usr/bin/env bash

cd ~/.ssh

function get_includes {
	includes=$(cat $1 | awk '{$1=$1};1' | grep -i "^include\s" | perl -pe 's#^include\s+##i')
    for config in $includes; do
		echo $config
		get_includes $config
	done
}

function get_configs {
	base=$1
	echo $base
	get_includes $base
}

function get_hosts {
	config_files=$(get_configs ~/.ssh/config)
	cat $config_files | awk '{$1=$1};1' | grep -i "^host\s" | perl -pe 's#^host\s+##i' | grep -v \*
}


if [[ $# -eq 0 ]] ; then
	eval "get_hosts | nl -ba"
	exit;
fi

host_num=$1
host=""

re='^[0-9]+$'
if [[ $host_num =~ $re ]] ; then
	host=$(eval "get_hosts | sed -n '${host_num}p'")

	if [[ -z $host ]] ; then
		echo "Error: invalid host number" >&2
		exit 1
	fi
fi

# If nothing found yet - try grepping for the result
if [[ -z $host ]]; then
	
	# Partially support glob like * (only after Latin character)
	pattern=$(printf $1 | sed 's/\([a-z]\)\*/\1.*/g')
	
	matching_hosts=$(eval "get_hosts | grep -i $pattern")
	lines=$(grep -c . <<<"$matching_hosts")
	
	if (( $lines > 1 )); then
				options=$(eval "get_hosts | nl -s' ' -ba | grep -i \"$pattern\"" | perl -pe 's/^\s*(\d+)\s+(.*)$/\2±(\1)/')
				IFS='
'
				i=1
				for option in $options; do
					printf "  [%d] %s" $i ${option/±/' '}
					echo
					((i++))
				done

				read -p "Select number from the list, or click [Enter] to cancel: " selection

				if [[ -z "$selection" ]]; then
					exit 1
				fi

				if [[ $selection =~ $re ]]; then
					matching_hosts=$(sed -n "${selection}p" <<<"$options" | awk -F'±' '{print $1}')
				fi
	fi

	host="$matching_hosts"
fi

# Host is Empty
if [[ -z $host ]] ; then
   echo "Error: Did not find any matching host" >&2
   exit 1
fi

echo "Connecting $host"

ssh $host ${@:2}