{ config, lib, pkgs, ... }: let cfg = config.services.octoprint; baseConfig = { plugins.curalegacy.cura_engine = "${pkgs.curaengine_stable}/bin/CuraEngine"; server.host = cfg.host; server.port = cfg.port; webcam.ffmpeg = "${pkgs.ffmpeg.bin}/bin/ffmpeg"; }; fullConfig = lib.recursiveUpdate cfg.extraConfig baseConfig; cfgUpdate = pkgs.writeText "octoprint-config.yaml" (builtins.toJSON fullConfig); pluginsEnv = package.python.withPackages (ps: [ ps.octoprint ] ++ (cfg.plugins ps)); package = pkgs.octoprint; in { ##### interface options = { services.octoprint = { enable = lib.mkEnableOption "OctoPrint, web interface for 3D printers"; host = lib.mkOption { type = lib.types.str; default = "0.0.0.0"; description = '' Host to bind OctoPrint to. ''; }; port = lib.mkOption { type = lib.types.port; default = 5000; description = '' Port to bind OctoPrint to. ''; }; openFirewall = lib.mkOption { type = lib.types.bool; default = false; description = "Open ports in the firewall for OctoPrint."; }; user = lib.mkOption { type = lib.types.str; default = "octoprint"; description = "User for the daemon."; }; group = lib.mkOption { type = lib.types.str; default = "octoprint"; description = "Group for the daemon."; }; stateDir = lib.mkOption { type = lib.types.path; default = "/var/lib/octoprint"; description = "State directory of the daemon."; }; plugins = lib.mkOption { type = lib.types.functionTo (lib.types.listOf lib.types.package); default = plugins: [ ]; defaultText = lib.literalExpression "plugins: []"; example = lib.literalExpression "plugins: with plugins; [ themeify stlviewer ]"; description = "Additional plugins to be used. Available plugins are passed through the plugins input."; }; extraConfig = lib.mkOption { type = lib.types.attrs; default = { }; description = "Extra options which are added to OctoPrint's YAML configuration file."; }; }; }; ##### implementation config = lib.mkIf cfg.enable { users.users = lib.optionalAttrs (cfg.user == "octoprint") { octoprint = { group = cfg.group; uid = config.ids.uids.octoprint; }; }; users.groups = lib.optionalAttrs (cfg.group == "octoprint") { octoprint.gid = config.ids.gids.octoprint; }; systemd.tmpfiles.rules = [ "d '${cfg.stateDir}' - ${cfg.user} ${cfg.group} - -" # this will allow octoprint access to raspberry specific hardware to check for throttling # read-only will not work: "VCHI initialization failed" error "a /dev/vchiq - - - - u:octoprint:rw" ]; systemd.services.octoprint = { description = "OctoPrint, web interface for 3D printers"; wantedBy = [ "multi-user.target" ]; after = [ "network.target" ]; path = [ pluginsEnv ]; preStart = '' if [ -e "${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 "${cfg.stateDir}/config.yaml" fi ''; serviceConfig = { ExecStart = "${pluginsEnv}/bin/octoprint serve -b ${cfg.stateDir}"; User = cfg.user; Group = cfg.group; SupplementaryGroups = [ "dialout" ]; }; }; networking.firewall.allowedTCPPorts = lib.mkIf cfg.openFirewall [ cfg.port ]; }; }