{ config, lib, pkgs, ... }: with lib; let cfg = config.services.octoprint; baseConfig = { plugins.cura.cura_engine = "${pkgs.curaengine}/bin/CuraEngine"; server.host = cfg.host; server.port = cfg.port; webcam.ffmpeg = "${pkgs.ffmpeg.bin}/bin/ffmpeg"; }; fullConfig = recursiveUpdate cfg.extraConfig baseConfig; cfgUpdate = pkgs.writeText "octoprint-config.yaml" (builtins.toJSON fullConfig); pluginsEnv = pkgs.python.buildEnv.override { extraLibs = cfg.plugins pkgs.octoprint-plugins; }; in { ##### interface options = { services.octoprint = { enable = mkEnableOption "OctoPrint, web interface for 3D printers"; host = mkOption { type = types.str; default = "0.0.0.0"; description = '' Host to bind OctoPrint to. ''; }; port = mkOption { type = types.int; default = 5000; description = '' Port to bind OctoPrint to. ''; }; user = mkOption { type = types.str; default = "octoprint"; description = "User for the daemon."; }; group = mkOption { type = types.str; default = "octoprint"; description = "Group for the daemon."; }; stateDir = mkOption { type = types.path; default = "/var/lib/octoprint"; description = "State directory of the daemon."; }; plugins = mkOption { default = plugins: []; defaultText = "plugins: []"; example = literalExample "plugins: [ m3d-fio ]"; description = "Additional plugins."; }; extraConfig = mkOption { type = types.attrs; default = {}; description = "Extra options which are added to OctoPrint's YAML configuration file."; }; }; }; ##### implementation config = mkIf cfg.enable { users.extraUsers = optionalAttrs (cfg.user == "octoprint") (singleton { name = "octoprint"; group = cfg.group; uid = config.ids.uids.octoprint; }); users.extraGroups = optionalAttrs (cfg.group == "octoprint") (singleton { name = "octoprint"; gid = config.ids.gids.octoprint; }); systemd.services.octoprint = { description = "OctoPrint, web interface for 3D printers"; wantedBy = [ "multi-user.target" ]; after = [ "network.target" ]; path = [ pluginsEnv ]; environment.PYTHONPATH = makeSearchPathOutput "lib" pkgs.python.sitePackages [ pluginsEnv ]; preStart = '' mkdir -p "${cfg.stateDir}" if [ -e "${cfg.stateDir}/config.yaml" ]; then ${pkgs.yaml-merge}/bin/yaml-merge "${cfg.stateDir}/config.yaml" "${cfgUpdate}" > "${cfg.stateDir}/config.yaml.tmp" mv "${cfg.stateDir}/config.yaml.tmp" "${cfg.stateDir}/config.yaml" else cp "${cfgUpdate}" "${cfg.stateDir}/config.yaml" chmod 600 "${cfg.stateDir}/config.yaml" fi chown -R ${cfg.user}:${cfg.group} "${cfg.stateDir}" ''; serviceConfig = { ExecStart = "${pkgs.octoprint}/bin/octoprint -b ${cfg.stateDir}"; User = cfg.user; Group = cfg.group; PermissionsStartOnly = true; }; }; }; }