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path: root/nixos/modules/services/audio/navidrome.nix
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{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.services.navidrome;
  settingsFormat = pkgs.formats.json {};
in {
  options = {
    services.navidrome = {

      enable = mkEnableOption "Navidrome music server";

      package = mkPackageOption pkgs "navidrome" { };

      settings = mkOption rec {
        type = settingsFormat.type;
        apply = recursiveUpdate default;
        default = {
          Address = "127.0.0.1";
          Port = 4533;
        };
        example = {
          MusicFolder = "/mnt/music";
        };
        description = ''
          Configuration for Navidrome, see <https://www.navidrome.org/docs/usage/configuration-options/> for supported values.
        '';
      };

      openFirewall = mkOption {
        type = types.bool;
        default = false;
        description = "Whether to open the TCP port in the firewall";
      };
    };
  };

  config = mkIf cfg.enable {
    networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall [cfg.settings.Port];

    systemd.services.navidrome = {
      description = "Navidrome Media Server";
      after = [ "network.target" ];
      wantedBy = [ "multi-user.target" ];
      serviceConfig = {
        ExecStart = ''
          ${cfg.package}/bin/navidrome --configfile ${settingsFormat.generate "navidrome.json" cfg.settings}
        '';
        DynamicUser = true;
        StateDirectory = "navidrome";
        WorkingDirectory = "/var/lib/navidrome";
        RuntimeDirectory = "navidrome";
        RootDirectory = "/run/navidrome";
        ReadWritePaths = "";
        BindPaths = lib.optional (cfg.settings ? DataFolder) cfg.settings.DataFolder;
        BindReadOnlyPaths = [
          # navidrome uses online services to download additional album metadata / covers
          "${config.environment.etc."ssl/certs/ca-certificates.crt".source}:/etc/ssl/certs/ca-certificates.crt"
          builtins.storeDir
          "/etc"
        ] ++ lib.optional (cfg.settings ? MusicFolder) cfg.settings.MusicFolder;
        CapabilityBoundingSet = "";
        RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
        RestrictNamespaces = true;
        PrivateDevices = true;
        PrivateUsers = true;
        ProtectClock = true;
        ProtectControlGroups = true;
        ProtectHome = true;
        ProtectKernelLogs = true;
        ProtectKernelModules = true;
        ProtectKernelTunables = true;
        SystemCallArchitectures = "native";
        SystemCallFilter = [ "@system-service" "~@privileged" ];
        RestrictRealtime = true;
        LockPersonality = true;
        MemoryDenyWriteExecute = true;
        UMask = "0066";
        ProtectHostname = true;
      };
    };
  };
}