servo: matrix: enable mx-puppet-discord for better Discord bridging

machines/servo/services/matrix/default.nix

@@ -4,7 +4,8 @@
 
 {
   imports = [
-    ./discord-appservice.nix
+    # ./discord-appservice.nix
+    ./discord-puppet.nix
     # ./irc.nix
   ];
 

machines/servo/services/matrix/discord-puppet.nix

@@ -0,0 +1,52 @@
+{ lib, ... }:
+{
+  sane.impermanence.service-dirs = [
+    { user = "matrix-synapse"; group = "matrix-synapse"; directory = "/var/lib/mx-puppet-discord"; }
+  ];
+
+  services.matrix-synapse.settings.app_service_config_files = [
+    # auto-created by mx-puppet-discord service
+    "/var/lib/mx-puppet-discord/discord-registration.yaml"
+  ];
+
+  services.mx-puppet-discord.enable = true;
+  # schema/example: <https://gitlab.com/mx-puppet/discord/mx-puppet-discord/-/blob/main/sample.config.yaml>
+  services.mx-puppet-discord.settings = {
+    bridge = {
+      # port = 8434
+      bindAddress = "127.0.0.1";
+      domain = "uninsane.org";
+      homeserverUrl = "http://127.0.0.1:8008";
+      # displayName = "mx-discord-puppet";  # matrix name for the bot
+      # matrix "groups" were an earlier version of spaces.
+      # maybe the puppet understands this, maybe not?
+      enableGroupSync = false;
+    };
+    presence = {
+      enabled = false;
+      interval = 30000;
+    };
+    provisioning = {
+      # allow these users to control the puppet
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    relay = {
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    selfService = {
+      # who's allowed to use plumbed rooms (idk what that means)
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    logging = {
+      # silly, debug, verbose, info, warn, error
+      console = "debug";
+    };
+  };
+
+  systemd.services.mx-puppet-discord.serviceConfig = {
+    # fix up to not use /var/lib/private, but just /var/lib
+    DynamicUser = lib.mkForce false;
+    User = "matrix-synapse";
+    Group = "matrix-synapse";
+  };
+}