stockholm/krebs/3modules/charybdis.nix

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{ config, lib, pkgs, ... }:
let
inherit (lib) mkEnableOption mkIf mkOption singleton types;
inherit (pkgs) coreutils charybdis;
cfg = config.krebs.charybdis;
configFile = pkgs.writeText "charybdis.conf" ''
${cfg.config}
'';
in
{
###### interface
options = {
krebs.charybdis = {
enable = mkEnableOption "Charybdis IRC daemon";
config = mkOption {
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type = types.str;
description = ''
Charybdis IRC daemon configuration file.
'';
};
statedir = mkOption {
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type = types.str;
default = "/var/lib/charybdis";
description = ''
Location of the state directory of charybdis.
'';
};
user = mkOption {
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type = types.str;
default = "ircd";
description = ''
Charybdis IRC daemon user.
'';
};
group = mkOption {
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type = types.str;
default = "ircd";
description = ''
Charybdis IRC daemon group.
'';
};
motd = mkOption {
type = types.nullOr types.lines;
default = null;
description = ''
Charybdis MOTD text.
Charybdis will read its MOTD from /etc/charybdis/ircd.motd .
If set, the value of this option will be written to this path.
'';
};
};
};
###### implementation
config = mkIf cfg.enable (lib.mkMerge [
{
users.users = singleton {
name = cfg.user;
description = "Charybdis IRC daemon user";
uid = config.ids.uids.ircd;
group = cfg.group;
};
users.groups = singleton {
name = cfg.group;
gid = config.ids.gids.ircd;
};
systemd.services.charybdis = {
description = "Charybdis IRC daemon";
wantedBy = [ "multi-user.target" ];
environment = {
BANDB_DBPATH = "${cfg.statedir}/ban.db";
};
serviceConfig = {
ExecStart = "${charybdis}/bin/charybdis -foreground -logfile /dev/stdout -configfile ${configFile}";
Group = cfg.group;
User = cfg.user;
PermissionsStartOnly = true; # preStart needs to run with root permissions
};
preStart = ''
${coreutils}/bin/mkdir -p ${cfg.statedir}
${coreutils}/bin/chown ${cfg.user}:${cfg.group} ${cfg.statedir}
'';
};
}
(mkIf (cfg.motd != null) {
environment.etc."charybdis/ircd.motd".text = cfg.motd;
})
]);
}