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|
{ pkgs, lib, ... }:
with lib;
pkgs.writeDashBin "irc-announce" ''
set -euf
export PATH=${makeSearchPath "bin" (with pkgs; [
coreutils
gawk
gnused
netcat
nettools
])}
IRC_SERVER=$1
IRC_PORT=$2
IRC_NICK=$3$$
IRC_CHANNEL=$4
message=$5
export IRC_CHANNEL # for privmsg_cat
# echo2 and cat2 are used output to both, stdout and stderr
# This is used to see what we send to the irc server. (debug output)
echo2() { echo "$*"; echo "$*" >&2; }
cat2() { tee /dev/stderr; }
# privmsg_cat transforms stdin to a privmsg
privmsg_cat() { awk '{ print "PRIVMSG "ENVIRON["IRC_CHANNEL"]" :"$0 }'; }
# ircin is used to feed the output of netcat back to the "irc client"
# so we can implement expect-like behavior with sed^_^
# XXX mkselfdestructingtmpfifo would be nice instead of this cruft
tmpdir="$(mktemp -d irc-announce_XXXXXXXX)"
cd "$tmpdir"
mkfifo ircin
trap "
rm ircin
cd '$OLDPWD'
rmdir '$tmpdir'
trap - EXIT INT QUIT
" EXIT INT QUIT
{
echo2 "USER $LOGNAME 0 * :$LOGNAME@$(hostname)"
echo2 "NICK $IRC_NICK"
# wait for MODE message
sed -n '/^:[^ ]* MODE /q'
echo2 "JOIN $IRC_CHANNEL"
printf '%s' "$message" \
| privmsg_cat \
| cat2
echo2 "PART $IRC_CHANNEL"
# wait for PART confirmation
sed -n '/:'"$IRC_NICK"'![^ ]* PART /q'
echo2 'QUIT :Gone to have lunch'
} < ircin \
| nc "$IRC_SERVER" "$IRC_PORT" | tee -a ircin
''
|
