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-rw-r--r--krebs/5pkgs/irc-announce/default.nix68
1 files changed, 68 insertions, 0 deletions
diff --git a/krebs/5pkgs/irc-announce/default.nix b/krebs/5pkgs/irc-announce/default.nix
new file mode 100644
index 000000000..af6b35ec6
--- /dev/null
+++ b/krebs/5pkgs/irc-announce/default.nix
@@ -0,0 +1,68 @@
+{ 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"]" :"$0 }'; }
+
+ # we cd to /tmp here to be able to create a tmpdir in the first place
+ cd /tmp
+ # ircin is used to feed the output of netcat back to the "irc client"
+ # so we can implement expect-like behavior with sed^_^
+ # XXX mkselfdestructingtmpfifo would be nice instead of this cruft
+ tmpdir="$(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
+''