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|
{ config, lib, pkgs, ... }:
with lib;
let
name = "mpd";
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.playlistDirectory}"
${lib.optionalString (cfg.dbFile != null) ''
db_file "${cfg.dbFile}"
''}
state_file "${cfg.dataDir}/state"
sticker_file "${cfg.dataDir}/sticker.sql"
log_file "syslog"
user "${cfg.user}"
group "${cfg.group}"
${optionalString (cfg.network.listenAddress != "any") ''bind_to_address "${cfg.network.listenAddress}"''}
${optionalString (cfg.network.port != 6600) ''port "${toString cfg.network.port}"''}
${cfg.extraConfig}
'';
in {
###### interface
options = {
services.mpd = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable MPD, the music player daemon.
'';
};
startWhenNeeded = mkOption {
type = types.bool;
default = false;
description = ''
If set, <command>mpd</command> is socket-activated; that
is, instead of having it permanently running as a daemon,
systemd will start it on the first incoming connection.
'';
};
musicDirectory = mkOption {
type = with types; either path (strMatching "(http|https|nfs|smb)://.+");
default = "${cfg.dataDir}/music";
defaultText = ''''${dataDir}/music'';
description = ''
The directory or NFS/SMB network share where mpd reads music from.
'';
};
playlistDirectory = mkOption {
type = types.path;
default = "${cfg.dataDir}/playlists";
defaultText = ''''${dataDir}/playlists'';
description = ''
The directory where mpd stores playlists.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Extra directives added to to the end of MPD's configuration file,
mpd.conf. Basic configuration like file location and uid/gid
is added automatically to the beginning of the file. For available
options see <literal>man 5 mpd.conf</literal>'.
'';
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/${name}";
description = ''
The directory where MPD stores its state, tag cache,
playlists etc.
'';
};
user = mkOption {
type = types.str;
default = name;
description = "User account under which MPD runs.";
};
group = mkOption {
type = types.str;
default = name;
description = "Group account under which MPD runs.";
};
network = {
listenAddress = mkOption {
type = types.str;
default = "127.0.0.1";
example = "any";
description = ''
The address for the daemon to listen on.
Use <literal>any</literal> to listen on all addresses.
'';
};
port = mkOption {
type = types.int;
default = 6600;
description = ''
This setting is the TCP port that is desired for the daemon to get assigned
to.
'';
};
};
dbFile = mkOption {
type = types.nullOr types.str;
default = "${cfg.dataDir}/tag_cache";
defaultText = ''''${dataDir}/tag_cache'';
description = ''
The path to MPD's database. If set to <literal>null</literal> the
parameter is omitted from the configuration.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
systemd.sockets.mpd = mkIf cfg.startWhenNeeded {
description = "Music Player Daemon Socket";
wantedBy = [ "sockets.target" ];
listenStreams = [
"${optionalString (cfg.network.listenAddress != "any") "${cfg.network.listenAddress}:"}${toString cfg.network.port}"
];
socketConfig = {
Backlog = 5;
KeepAlive = true;
PassCredentials = true;
};
};
systemd.tmpfiles.rules = [
"d '${cfg.dataDir}' - ${cfg.user} ${cfg.group} - -"
"d '${cfg.playlistDirectory}' - ${cfg.user} ${cfg.group} - -"
];
systemd.services.mpd = {
after = [ "network.target" "sound.target" ];
description = "Music Player Daemon";
wantedBy = optional (!cfg.startWhenNeeded) "multi-user.target";
serviceConfig = {
User = "${cfg.user}";
ExecStart = "${pkgs.mpd}/bin/mpd --no-daemon ${mpdConf}";
Type = "notify";
LimitRTPRIO = 50;
LimitRTTIME = "infinity";
ProtectSystem = true;
NoNewPrivileges = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
ProtectKernelModules = true;
RestrictAddressFamilies = "AF_INET AF_INET6 AF_UNIX AF_NETLINK";
RestrictNamespaces = true;
};
};
users.users = optionalAttrs (cfg.user == name) (singleton {
inherit uid;
inherit name;
group = cfg.group;
extraGroups = [ "audio" ];
description = "Music Player Daemon user";
home = "${cfg.dataDir}";
});
users.groups = optionalAttrs (cfg.group == name) (singleton {
inherit name;
gid = gid;
});
};
}
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