nixpkgs/nixos/modules/services/audio/mpd.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

93 lines
2.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
uid = config.ids.uids.mpd;
gid = config.ids.gids.mpd;
cfg = config.services.mpd;
mpdConf = pkgs.writeText "mpd.conf" ''
music_directory "${cfg.musicDirectory}"
playlist_directory "${cfg.dataDir}/playlists"
db_file "${cfg.dataDir}/tag_cache"
state_file "${cfg.dataDir}/state"
sticker_file "${cfg.dataDir}/sticker.sql"
log_file "syslog"
user "mpd"
${cfg.extraConfig}
'';
in {
###### interface
options = {
services.mpd = {
enable = mkOption {
default = false;
description = ''
Whether to enable MPD, the music player daemon.
'';
};
musicDirectory = mkOption {
default = "${cfg.dataDir}/music";
description = ''
Extra configuration added to the end of MPD's
configuration file, mpd.conf.
'';
};
extraConfig = mkOption {
default = "";
description = ''
Extra directives added to to the end of MPD's configuration file,
mpd.conf. Basic configuration like file location and uid/gid
is added automatically to the beginning of the file.
'';
};
dataDir = mkOption {
default = "/var/lib/mpd/";
description = ''
The directory where MPD stores its state, tag cache,
playlists etc.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
systemd.services.mpd = {
after = [ "network.target" "sound.target" ];
description = "Music Player Daemon";
wantedBy = [ "multi-user.target" ];
path = [ pkgs.mpd ];
preStart = "mkdir -p ${cfg.dataDir} && chown -R mpd:mpd ${cfg.dataDir}";
script = "exec mpd --no-daemon ${mpdConf}";
};
users.extraUsers.mpd = {
inherit uid;
group = "mpd";
extraGroups = [ "audio" ];
description = "Music Player Daemon user";
home = "${cfg.dataDir}";
};
users.extraGroups.mpd.gid = gid;
};
}