stockholm/lass/2configs/radio.nix
2016-05-21 13:47:09 +02:00

134 lines
2.9 KiB
Nix

{ config, pkgs, ... }:
let
name = "radio";
mainUser = config.users.extraUsers.mainUser;
inherit (config.krebs.lib) genid;
admin-password = import <secrets/icecast-admin-pw>;
source-password = import <secrets/icecast-source-pw>;
in {
users.users = {
"${name}" = rec {
inherit name;
group = name;
uid = genid name;
description = "radio manager";
home = "/home/${name}";
useDefaultShell = true;
createHome = true;
openssh.authorizedKeys.keys = [
config.krebs.users.lass.pubkey
];
};
};
users.groups = {
"radio" = {};
};
krebs.per-user.${name}.packages = with pkgs; [
ncmpcpp
mpc_cli
tmux
];
security.sudo.extraConfig = ''
${mainUser.name} ALL=(${name}) NOPASSWD: ALL
'';
services.mpd = {
enable = true;
group = "radio";
musicDirectory = "/home/radio/the_playlist/music";
extraConfig = ''
audio_output {
type "shout"
encoding "ogg"
name "my cool stream"
host "localhost"
port "8000"
mount "/radio.ogg"
# This is the source password in icecast.xml
password "${source-password}"
# Set either quality or bit rate
# quality "5.0"
bitrate "128"
format "44100:16:1"
# Optional Parameters
user "source"
# description "here is my long description"
# genre "jazz"
} # end of audio_output
'';
};
services.icecast = {
enable = true;
hostname = "config.krebs.build.host.name";
admin.password = admin-password;
extraConf = ''
<authentication>
<source-password>${source-password}</source-password>
</authentication>
'';
};
krebs.iptables = {
tables = {
filter.INPUT.rules = [
{ predicate = "-p tcp --dport 8000"; target = "ACCEPT"; }
];
};
};
systemd.timers.radio = {
description = "radio autoadder timer";
wantedBy = [ "timers.target" ];
timerConfig = {
OnCalendar = "*:*";
};
};
systemd.services.radio = let
autoAdd = pkgs.writeDash "autoAdd" ''
LIMIT=$1 #in secconds
addRandom () {
mpc add "$(mpc ls | shuf -n1)"
}
timeLeft () {
playlistDuration=$(mpc --format '%time%' playlist | awk -F ':' 'BEGIN{t=0} {t+=$1*60+$2} END{print t}')
currentTime=$(mpc status | awk '/^\[playing\]/ { sub(/\/.+/,"",$3); split($3,a,/:/); print a[1]*60+a[2] }')
expr ''${playlistDuration:-0} - ''${currentTime:-0}
}
if test $(timeLeft) -le $LIMIT; then
addRandom
fi
'';
in {
description = "radio playlist autoadder";
after = [ "network.target" ];
path = with pkgs; [
gawk
mpc_cli
];
restartIfChanged = true;
serviceConfig = {
Restart = "always";
ExecStart = "${autoAdd} 100";
};
};
}