conduwuit: mark as EOL, nixos/conduwuit: remove (#397902)

- [ncps](https://github.com/kalbasit/ncps), a Nix binary cache proxy service implemented in Go using [go-nix](https://github.com/nix-community/go-nix). Available as [services.ncps](options.html#opt-services.ncps.enable).

- [Conduwuit](https://conduwuit.puppyirl.gay/), a federated chat server implementing the Matrix protocol, forked from Conduit. Available as [services.conduwuit](#opt-services.conduwuit.enable).

- [Readeck](https://readeck.org/), a read-it later web-application. Available as [services.readeck](#opt-services.readeck.enable).

- [Traccar](https://www.traccar.org/), a modern GPS Tracking Platform. Available as [services.traccar](#opt-services.traccar.enable).

- The behavior of `services.hostapd.radios.<name>.networks.<name>.authentication.enableRecommendedPairwiseCiphers` was changed to not include `CCMP-256` anymore.

  Since all configured pairwise ciphers have to be supported by the radio, this caused startup failures on many devices which is hard to debug in hostapd.

- The `conduwuit` matrix server implementation has officially been discontinued by upstream and the package has thus been marked as vulnerable, as it is a security-sensitive package that has reached EOL.

- `gkraken` software and `hardware.gkraken.enable` option have been removed, use `coolercontrol` via `programs.coolercontrol.enable` option instead.

- To avoid delaying user logins unnecessarily the `multi-user.target` is no longer ordered after `network-online.target`.

  ./services/matrix/appservice-discord.nix

  ./services/matrix/appservice-irc.nix

  ./services/matrix/conduit.nix

  ./services/matrix/conduwuit.nix

  ./services/matrix/dendrite.nix

  ./services/matrix/hebbot.nix

  ./services/matrix/hookshot.nix

    (mkRemovedOptionModule [ "services" "rippleDataApi" ] ''

      The corresponding package was broken, abandoned upstream and thus removed from nixpkgs.

    '')

    (mkRemovedOptionModule [ "services" "conduwuit" ] ''

      The conduwuit project has been discontinued by upstream.

      See https://github.com/NixOS/nixpkgs/pull/397902 for more information.

    '')

    # Do NOT add any option renames here, see top of the file

  ];

{

  config,

  lib,

  pkgs,

  ...

}:

let

  cfg = config.services.conduwuit;

  defaultUser = "conduwuit";

  defaultGroup = "conduwuit";

  format = pkgs.formats.toml { };

  configFile = format.generate "conduwuit.toml" cfg.settings;

in

{

  meta.maintainers = with lib.maintainers; [ niklaskorz ];

  options.services.conduwuit = {

    enable = lib.mkEnableOption "conduwuit";

    user = lib.mkOption {

      type = lib.types.nonEmptyStr;

      description = ''

        The user {command}`conduwuit` is run as.

      '';

      default = defaultUser;

    };

    group = lib.mkOption {

      type = lib.types.nonEmptyStr;

      description = ''

        The group {command}`conduwuit` is run as.

      '';

      default = defaultGroup;

    };

    extraEnvironment = lib.mkOption {

      type = lib.types.attrsOf lib.types.str;

      description = "Extra Environment variables to pass to the conduwuit server.";

      default = { };

      example = {

        RUST_BACKTRACE = "yes";

      };

    };

    package = lib.mkPackageOption pkgs "conduwuit" { };

    settings = lib.mkOption {

      type = lib.types.submodule {

        freeformType = format.type;

        options = {

          global.server_name = lib.mkOption {

            type = lib.types.nonEmptyStr;

            example = "example.com";

            description = "The server_name is the name of this server. It is used as a suffix for user and room ids.";

          };

          global.address = lib.mkOption {

            type = lib.types.nullOr (lib.types.listOf lib.types.nonEmptyStr);

            default = null;

            example = [

              "127.0.0.1"

              "::1"

            ];

            description = ''

              Addresses (IPv4 or IPv6) to listen on for connections by the reverse proxy/tls terminator.

              If set to `null`, conduwuit will listen on IPv4 and IPv6 localhost.

              Must be `null` if `unix_socket_path` is set.

            '';

          };

          global.port = lib.mkOption {

            type = lib.types.listOf lib.types.port;

            default = [ 6167 ];

            description = ''

              The port(s) conduwuit will be running on.

              You need to set up a reverse proxy in your web server (e.g. apache or nginx),

              so all requests to /_matrix on port 443 and 8448 will be forwarded to the conduwuit

              instance running on this port.

            '';

          };

          global.unix_socket_path = lib.mkOption {

            type = lib.types.nullOr lib.types.path;

            default = null;

            description = ''

              Listen on a UNIX socket at the specified path. If listening on a UNIX socket,

              listening on an address will be disabled. The `address` option must be set to

              `null` (the default value). The option {option}`services.conduwuit.group` must

              be set to a group your reverse proxy is part of.

              This will automatically add a system user "conduwuit" to your system if

              {option}`services.conduwuit.user` is left at the default, and a "conduwuit"

              group if {option}`services.conduwuit.group` is left at the default.

            '';

          };

          global.unix_socket_perms = lib.mkOption {

            type = lib.types.ints.positive;

            default = 660;

            description = "The default permissions (in octal) to create the UNIX socket with.";

          };

          global.max_request_size = lib.mkOption {

            type = lib.types.ints.positive;

            default = 20000000;

            description = "Max request size in bytes. Don't forget to also change it in the proxy.";

          };

          global.allow_registration = lib.mkOption {

            type = lib.types.bool;

            default = false;

            description = ''

              Whether new users can register on this server.

              Registration with token requires `registration_token` or `registration_token_file` to be set.

              If set to true without a token configured, and

              `yes_i_am_very_very_sure_i_want_an_open_registration_server_prone_to_abuse`

              is set to true, users can freely register.

            '';

          };

          global.allow_encryption = lib.mkOption {

            type = lib.types.bool;

            default = true;

            description = "Whether new encrypted rooms can be created. Note: existing rooms will continue to work.";

          };

          global.allow_federation = lib.mkOption {

            type = lib.types.bool;

            default = true;

            description = ''

              Whether this server federates with other servers.

            '';

          };

          global.trusted_servers = lib.mkOption {

            type = lib.types.listOf lib.types.nonEmptyStr;

            default = [ "matrix.org" ];

            description = ''

              Servers listed here will be used to gather public keys of other servers

              (notary trusted key servers).

              Currently, conduwuit doesn't support inbound batched key requests, so

              this list should only contain other Synapse servers.

              Example: `[ "matrix.org" "constellatory.net" "tchncs.de" ]`

            '';

          };

          global.database_path = lib.mkOption {

            readOnly = true;

            type = lib.types.path;

            default = "/var/lib/conduwuit/";

            description = ''

              Path to the conduwuit database, the directory where conduwuit will save its data.

              Note that database_path cannot be edited because of the service's reliance on systemd StateDir.

            '';

          };

          global.allow_check_for_updates = lib.mkOption {

            type = lib.types.bool;

            default = false;

            description = ''

              If enabled, conduwuit will send a simple GET request periodically to

              <https://pupbrain.dev/check-for-updates/stable> for any new announcements made.

              Despite the name, this is not an update check endpoint, it is simply an announcement check endpoint.

              Disabled by default.

            '';

          };

        };

      };

      default = { };

      # TOML does not allow null values, so we use null to omit those fields

      apply = lib.filterAttrsRecursive (_: v: v != null);

      description = ''

        Generates the conduwuit.toml configuration file. Refer to

        <https://conduwuit.puppyirl.gay/configuration.html>

        for details on supported values.

      '';

    };

  };

  config = lib.mkIf cfg.enable {

    assertions = [

      {

        assertion = !(cfg.settings ? global.unix_socket_path) || !(cfg.settings ? global.address);

        message = ''

          In `services.conduwuit.settings.global`, `unix_socket_path` and `address` cannot be set at the

          same time.

          Leave one of the two options unset or explicitly set them to `null`.

        '';

      }

      {

        assertion = cfg.user != defaultUser -> config ? users.users.${cfg.user};

        message = "If `services.conduwuit.user` is changed, the configured user must already exist.";

      }

      {

        assertion = cfg.group != defaultGroup -> config ? users.groups.${cfg.group};

        message = "If `services.conduwuit.group` is changed, the configured group must already exist.";

      }

    ];

    users.users = lib.mkIf (cfg.user == defaultUser) {

      ${defaultUser} = {

        group = cfg.group;

        home = cfg.settings.global.database_path;

        isSystemUser = true;

      };

    };

    users.groups = lib.mkIf (cfg.group == defaultGroup) {

      ${defaultGroup} = { };

    };

    systemd.services.conduwuit = {

      description = "Conduwuit Matrix Server";

      documentation = [ "https://conduwuit.puppyirl.gay/" ];

      wantedBy = [ "multi-user.target" ];

      wants = [ "network-online.target" ];

      after = [ "network-online.target" ];

      environment = lib.mkMerge ([

        { CONDUWUIT_CONFIG = configFile; }

        cfg.extraEnvironment

      ]);

      startLimitBurst = 5;

      startLimitIntervalSec = 60;

      serviceConfig = {

        DynamicUser = true;

        User = cfg.user;

        Group = cfg.group;

        DevicePolicy = "closed";

        LockPersonality = true;

        MemoryDenyWriteExecute = true;

        NoNewPrivileges = true;

        ProtectClock = true;

        ProtectControlGroups = true;

        ProtectHome = true;

        ProtectHostname = true;

        ProtectKernelLogs = true;

        ProtectKernelModules = true;

        ProtectKernelTunables = true;

        PrivateDevices = true;

        PrivateMounts = true;

        PrivateTmp = true;

        PrivateUsers = true;

        PrivateIPC = true;

        RemoveIPC = true;

        RestrictAddressFamilies = [

          "AF_INET"

          "AF_INET6"

          "AF_UNIX"

        ];

        RestrictNamespaces = true;

        RestrictRealtime = true;

        SystemCallArchitectures = "native";

        SystemCallFilter = [

          "@system-service @resources"

          "~@clock @debug @module @mount @reboot @swap @cpu-emulation @obsolete @timer @chown @setuid @privileged @keyring @ipc"

        ];

        SystemCallErrorNumber = "EPERM";

        StateDirectory = "conduwuit";

        StateDirectoryMode = "0700";

        RuntimeDirectory = "conduwuit";

        RuntimeDirectoryMode = "0750";

        ExecStart = lib.getExe cfg.package;

        Restart = "on-failure";

        RestartSec = 10;

      };

    };

  };

}

  coder = handleTest ./coder.nix { };

  collectd = handleTest ./collectd.nix { };

  commafeed = handleTest ./commafeed.nix { };

  conduwuit = runTest ./matrix/conduwuit.nix;

  connman = handleTest ./connman.nix { };

  consul = handleTest ./consul.nix { };

  consul-template = handleTest ./consul-template.nix { };