1 files changed, 122 insertions, 0 deletions
diff --git a/nixos/modules/services/misc/mx-puppet-discord.nix b/nixos/modules/services/misc/mx-puppet-discord.nix
new file mode 100644
index 00000000000..6214f7f7eb6
--- /dev/null
+++ b/nixos/modules/services/misc/mx-puppet-discord.nix
@@ -0,0 +1,122 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  dataDir = "/var/lib/mx-puppet-discord";
+  registrationFile = "${dataDir}/discord-registration.yaml";
+  cfg = config.services.mx-puppet-discord;
+  settingsFormat = pkgs.formats.json {};
+  settingsFile = settingsFormat.generate "mx-puppet-discord-config.json" cfg.settings;
+
+in {
+  options = {
+    services.mx-puppet-discord = {
+      enable = mkEnableOption ''
+        mx-puppet-discord is a discord puppeting bridge for matrix.
+        It handles bridging private and group DMs, as well as Guilds (servers)
+      '';
+
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          bridge.port = 8434;
+          presence = {
+            enabled = true;
+            interval = 500;
+          };
+          provisioning.whitelist = [ ];
+          relay.whitelist = [ ];
+
+          # variables are preceded by a colon.
+          namePatterns = {
+            user = ":name";
+            userOverride = ":displayname";
+            room = ":name";
+            group = ":name";
+          };
+
+          #defaults to sqlite but can be configured to use postgresql with
+          #connstring
+          database.filename = "${dataDir}/database.db";
+          logging = {
+            console = "info";
+            lineDateFormat = "MMM-D HH:mm:ss.SSS";
+          };
+        };
+        example = literalExpression ''
+          {
+            bridge = {
+              bindAddress = "localhost";
+              domain = "example.com";
+              homeserverUrl = "https://example.com";
+            };
+
+            provisioning.whitelist = [ "@admin:example.com" ];
+            relay.whitelist = [ "@.*:example.com" ];
+          }
+        '';
+        description = ''
+          <filename>config.yaml</filename> configuration as a Nix attribute set.
+          Configuration options should match those described in
+          <link xlink:href="https://github.com/matrix-discord/mx-puppet-discord/blob/master/sample.config.yaml">
+          sample.config.yaml</link>.
+        '';
+      };
+      serviceDependencies = mkOption {
+        type = with types; listOf str;
+        default = optional config.services.matrix-synapse.enable "matrix-synapse.service";
+        defaultText = literalExpression ''
+          optional config.services.matrix-synapse.enable "matrix-synapse.service"
+        '';
+        description = ''
+          List of Systemd services to require and wait for when starting the application service.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.mx-puppet-discord = {
+      description = "Matrix to Discord puppeting bridge";
+
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      after = [ "network-online.target" ] ++ cfg.serviceDependencies;
+
+      preStart = ''
+        # generate the appservice's registration file if absent
+        if [ ! -f '${registrationFile}' ]; then
+          ${pkgs.mx-puppet-discord}/bin/mx-puppet-discord -r -c ${settingsFile} \
+          -f ${registrationFile}
+        fi
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+
+        DynamicUser = true;
+        PrivateTmp = true;
+        WorkingDirectory = pkgs.mx-puppet-discord;
+        StateDirectory = baseNameOf dataDir;
+        UMask = 0027;
+
+        ExecStart = ''
+          ${pkgs.mx-puppet-discord}/bin/mx-puppet-discord \
+            -c ${settingsFile} \
+            -f ${registrationFile}
+        '';
+      };
+    };
+  };
+
+  meta.maintainers = with maintainers; [ govanify ];
+}