rowbot/rowbot

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#!/usr/bin/env bash
###
# argument parser for parsing arguments
##
declare -A opts
while (( $# )); do
case $1 in
--*=*)
key=${1#--} key=${key%%=*}
opts[$key]=${1#--*=}
;;
--no-*)
key=${1#--no-}
opts[$key]=no
;;
--)
shift
break
;;
--*)
key=${1#--}
opts[$key]=yes
;;
*)
break
esac
shift
done
###
# default config
##
server=${opts[server]:-irc.libera.chat}
tls=${opts[tls]:-no}
if [[ $tls = yes ]]; then
if ! hash socat 2>/dev/null; then
printf 'please install socat to use tls with rowbot.\n' >&2
exit 1
fi
port=${opts[port]:-6697}
else
port=${opts[port]:-6667}
fi
###
# net code
###
if [[ $tls = yes ]]; then
coproc sock { socat OPENSSL:"$server":"$port" -; }
in_sock=${sock[0]} out_sock=${sock[1]}
else
exec {sock}<>/dev/tcp/"$server"/"$port"
in_sock=$sock out_sock=$sock
fi
send() {
local fmt
printf -v fmt "$1" "${@:2}"
printf '%s\r\n' "$fmt" >&"$out_sock"
}
recv() {
declare -n sock_line=$1
IFS= read -r "$1" <&"$in_sock"
sock_line=${sock_line%$'\r'}
}
###
# driver
###
while recv line; do
declare -p line
done