2 files changed, 111 insertions, 0 deletions
diff --git a/krebs/3modules/charybdis.nix b/krebs/3modules/charybdis.nix
new file mode 100644
index 000000000..f4a7c1313
--- /dev/null
+++ b/krebs/3modules/charybdis.nix
@@ -0,0 +1,110 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption singleton types;
+  inherit (pkgs) coreutils charybdis;
+  cfg = config.krebs.charybdis;
+
+  configFile = pkgs.writeText "charybdis.conf" ''
+    ${cfg.config}
+  '';
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    krebs.charybdis = {
+
+      enable = mkEnableOption "Charybdis IRC daemon";
+
+      config = mkOption {
+        type = types.string;
+        description = ''
+          Charybdis IRC daemon configuration file.
+        '';
+      };
+
+      statedir = mkOption {
+        type = types.string;
+        default = "/var/lib/charybdis";
+        description = ''
+          Location of the state directory of charybdis.
+        '';
+      };
+
+      user = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon user.
+        '';
+      };
+
+      group = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          Charybdis IRC daemon group.
+        '';
+      };
+
+      motd = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Charybdis MOTD text.
+
+          Charybdis will read its MOTD from /etc/charybdis/ircd.motd .
+          If set, the value of this option will be written to this path.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable (lib.mkMerge [
+    {
+      users.users = singleton {
+        name = cfg.user;
+        description = "Charybdis IRC daemon user";
+        uid = config.ids.uids.ircd;
+        group = cfg.group;
+      };
+
+      users.groups = singleton {
+        name = cfg.group;
+        gid = config.ids.gids.ircd;
+      };
+
+      systemd.services.charybdis = {
+        description = "Charybdis IRC daemon";
+        wantedBy = [ "multi-user.target" ];
+        environment = {
+          BANDB_DBPATH = "${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;
+    })
+  ]);
+}
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 6307649e3..dd682bf4d 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -14,6 +14,7 @@ let
       ./buildbot/master.nix
       ./buildbot/slave.nix
       ./build.nix
+      ./charybdis.nix
       ./ci.nix
       ./current.nix
       ./exim.nix