Add Matrix sliding-sync service

modules/matrix/default.nix

@@ -21,6 +21,16 @@ in
         };
       };
     };
+    sliding-sync = {
+      port = mkOption {
+        description = "TCP port for synapse service.";
+        type = port;
+      };
+      secretFile = mkOption {
+        type = path;
+        description = "Location of the file to set secret environment variables.";
+      };
+    };
     fqdn = mkOption {
       type = str;
       description = ''
@@ -82,6 +92,7 @@ in
   imports = [
     ./mautrix-signal.nix
     ./mautrix-whatsapp.nix
+    ./sliding-sync.nix
     ./synapse.nix
   ];
 }

modules/matrix/sliding-sync.nix

@@ -0,0 +1,18 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.jalr.matrix;
+in
+lib.mkIf cfg.enable {
+  services.matrix-sliding-sync = {
+    enable = true;
+    settings = {
+      SYNCV3_SERVER = "https://${cfg.fqdn}";
+      SYNCV3_BINDADDR = "127.0.0.1:${toString cfg.sliding-sync.port}";
+    };
+    environmentFile = cfg.sliding-sync.secretFile;
+  };
+  services.nginx.virtualHosts."${cfg.fqdn}".locations."/_matrix/client/unstable/org.matrix.msc3575/sync" = {
+    proxyPass = "http://127.0.0.1:${toString cfg.sliding-sync.port}";
+  };
+}