fix mautrix telegram

config/services/matrix-media-repo.nix

@@ -134,7 +134,7 @@ in {
         curl -H "Authorization: Bearer $MATRIX_TOKEN" -X POST https://matrix.chir.rs/_matrix/media/unstable/admin/purge/old\?before_ts=$(date -d "3 months ago" +%s%3N)\&include_local=true && exit 0
       done
     '';
-    
+
     serviceConfig = {
       Type = "oneshot";
       User = "matrix-media-repo";

config/services/mautrix-telegram.nix

@@ -4,7 +4,10 @@
   pkgs,
   ...
 }: {
-  services.mautrix-telegram = {
+  imports = [
+    ../../modules/matrix/mautrix-telegram.nix
+  ];
+  services.mautrix-telegram-2 = {
     enable = true;
     environmentFile = config.sops.secrets."services/mautrix/telegram".path;
     settings = {
@@ -69,16 +72,4 @@
       };
     }
   ];
-  users.users.mautrix-telegram = {
-    description = "Mautrix telegram bridge";
-    home = "/var/lib/mautrix-telegram";
-    useDefaultShell = true;
-    group = "matrix-synapse";
-    isSystemUser = true;
-  };
-  systemd.services.mautrix-telegram.serviceConfig = {
-    User = "mautrix-telegram";
-    Group = "matrix-synapse";
-    DynamicUser = lib.mkForce false;
-  };
 }

modules/matrix/mautrix-telegram.nix

@@ -0,0 +1,152 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  dataDir = "/var/lib/mautrix-telegram";
+  registrationFile = "${dataDir}/signal-registration.yaml";
+  cfg = config.services.mautrix-telegram-2;
+  settingsFormat = pkgs.formats.yaml {};
+  settingsFileUnsubstituted = settingsFormat.generate "mautrix-telegram-signal-unsubstituted.yaml" cfg.settings;
+  settingsFile = "${dataDir}/config.yaml";
+in {
+  options = {
+    services.mautrix-telegram-2 = {
+      enable = mkEnableOption "mautrix-telegram, a Matrix-signal hybrid puppeting/relaybot bridge";
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          appservice = {
+            address = "http://localhost:29328";
+            hostname = "0.0.0.0";
+            port = 29328;
+            database = "sqlite:///${dataDir}/mautrix-telegram.db";
+            as_token = "$AS_TOKEN";
+            hs_token = "$HS_TOKEN";
+          };
+          logging = {
+            version = 1;
+
+            formatters.precise.format = "[%(levelname)s@%(name)s] %(message)s";
+
+            handlers.console = {
+              class = "logging.StreamHandler";
+              formatter = "precise";
+            };
+
+            loggers = {
+              mau.level = "INFO";
+              telethon.level = "INFO";
+
+              # prevent tokens from leaking in the logs:
+              # https://github.com/tulir/mautrix-telegram/issues/351
+              aiohttp.level = "WARNING";
+            };
+
+            # log to console/systemd instead of file
+            root = {
+              level = "INFO";
+              handlers = ["console"];
+            };
+          };
+        };
+      };
+      environmentFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = ''
+          File containing environment variables to be passed to the mautrix-telegram service,
+          in which secret tokens can be specified securely by defining values for
+          <literal>MAUTRIX_TELEGRAM_APPSERVICE_AS_TOKEN</literal>,
+          <literal>MAUTRIX_TELEGRAM_APPSERVICE_HS_TOKEN</literal>,
+          <literal>MAUTRIX_TELEGRAM_TELEGRAM_API_ID</literal>,
+          <literal>MAUTRIX_TELEGRAM_TELEGRAM_API_HASH</literal> and optionally
+          <literal>MAUTRIX_TELEGRAM_TELEGRAM_BOT_TOKEN</literal>.
+        '';
+      };
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.mautrix-telegram-genregistration = {
+      description = "mautrix-telegram Registration";
+
+      requiredBy = ["matrix-synapse.service"];
+      before = ["matrix-synapse.service"];
+      script = ''
+        # Not all secrets can be passed as environment variable (yet)
+        # https://github.com/tulir/mautrix-telegram/issues/584
+        [ -f ${settingsFile} ] && rm -f ${settingsFile}
+        old_umask=$(umask)
+        umask 0177
+        export AS_TOKEN="This value is generated when generating the registration"
+        export HS_TOKEN="This value is generated when generating the registration"
+        ${pkgs.envsubst}/bin/envsubst \
+          -o ${settingsFile} \
+          -i ${settingsFileUnsubstituted}
+        umask $old_umask
+
+        [ -f ${registrationFile} ] && rm -f ${registrationFile}
+        ${pkgs.mautrix-telegram}/bin/mautrix-telegram --generate-registration --config ${settingsFile} --registration ${registrationFile}
+        chmod 660 ${registrationFile}
+
+        # Extract the tokens from the registration
+        export AS_TOKEN=$(${pkgs.yq}/bin/yq -r '.as_token' ${registrationFile})
+        export HS_TOKEN=$(${pkgs.yq}/bin/yq -r '.hs_token' ${registrationFile})
+        umask 0177
+        ${pkgs.envsubst}/bin/envsubst \
+          -o ${settingsFile} \
+          -i ${settingsFileUnsubstituted}
+        umask $old_umask
+      '';
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+        WorkingDirectory = dataDir;
+        StateDirectory = baseNameOf dataDir;
+        UMask = 0117;
+        User = "mautrix-telegram";
+        Group = "matrix-synapse";
+        EnvironmentFile = cfg.environmentFile;
+      };
+      restartTriggers = [settingsFileUnsubstituted cfg.environmentFile];
+    };
+    systemd.services.mautrix-telegram = {
+      description = "mautrix-telegram";
+      wantedBy = ["multi-user.target"];
+      wants = ["matrix-synapse.service" "mautrix-telegram-genregistration.service"];
+      after = ["matrix-synapse.service" "mautrix-telegram-genregistration.service"];
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+
+        WorkingDirectory = dataDir;
+        User = "mautrix-telegram";
+        Group = "matrix-synapse";
+        EnvironmentFile = cfg.environmentFile;
+        ExecStart = ''
+          ${pkgs.mautrix-telegram}/bin/mautrix-telegram \
+            --config='${settingsFile}'
+        '';
+      };
+      restartTriggers = [cfg.environmentFile];
+    };
+    users.users.mautrix-telegram = {
+      description = "Mautrix telegram bridge";
+      home = "${dataDir}";
+      useDefaultShell = true;
+      group = "matrix-synapse";
+      isSystemUser = true;
+    };
+    services.matrix-synapse.settings.app_service_config_files = [
+      registrationFile
+    ];
+  };
+}