{ config, pkgs, lib, ... }: with lib; let cfg = config.services.rsyncd; motdFile = builtins.toFile "rsyncd-motd" cfg.motd; foreach = attrs: f: concatStringsSep "\n" (mapAttrsToList f attrs); cfgFile = '' ${optionalString (cfg.motd != "") "motd file = ${motdFile}"} ${optionalString (cfg.address != "") "address = ${cfg.address}"} ${optionalString (cfg.port != 873) "port = ${toString cfg.port}"} ${cfg.extraConfig} ${foreach cfg.modules (name: module: '' [${name}] ${foreach module (k: v: "${k} = ${v}" )} '')} ''; in { options = { services.rsyncd = { enable = mkOption { default = false; description = "Whether to enable the rsync daemon."; }; motd = mkOption { type = types.str; default = ""; description = '' Message of the day to display to clients on each connect. This usually contains site information and any legal notices. ''; }; port = mkOption { default = 873; type = types.int; description = "TCP port the daemon will listen on."; }; address = mkOption { default = ""; example = "192.168.1.2"; description = '' IP address the daemon will listen on; rsyncd will listen on all addresses if this is not specified. ''; }; extraConfig = mkOption { type = types.lines; default = ""; description = '' Lines of configuration to add to rsyncd globally. See man rsyncd.conf for options. ''; }; modules = mkOption { default = {}; description = '' A set describing exported directories. See man rsyncd.conf for options. ''; type = types.attrsOf (types.attrsOf types.str); example = { srv = { path = "/srv"; "read only" = "yes"; comment = "Public rsync share."; }; }; }; user = mkOption { type = types.str; default = "root"; description = '' The user to run the daemon as. By default the daemon runs as root. ''; }; group = mkOption { type = types.str; default = "root"; description = '' The group to run the daemon as. By default the daemon runs as root. ''; }; }; }; ###### implementation config = mkIf cfg.enable { environment.etc."rsyncd.conf".text = cfgFile; systemd.services.rsyncd = { description = "Rsync daemon"; wantedBy = [ "multi-user.target" ]; restartTriggers = [ config.environment.etc."rsyncd.conf".source ]; serviceConfig = { ExecStart = "${pkgs.rsync}/bin/rsync --daemon --no-detach"; User = cfg.user; Group = cfg.group; }; }; }; }