matrix: support via a locations api

hosts/vm.strangervm.ts.hillion.co.uk/default.nix

@@ -20,6 +20,7 @@
 
     ## Custom Services
     custom = {
+      locations.autoServe = true;
       www.global.enable = true;
       services.matrix.enable = true;
     };

modules/default.nix

@@ -4,6 +4,7 @@
   imports = [
     ./backups/default.nix
     ./desktop/awesome/default.nix
+    ./locations.nix
     ./resilio.nix
     ./services/matrix.nix
     ./tailscale.nix

modules/locations.nix

@@ -0,0 +1,25 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.custom.locations;
+in
+{
+  options.custom.locations = {
+    autoServe = lib.mkOption {
+      default = false;
+      type = lib.types.bool;
+    };
+
+    locations = lib.mkOption {
+      default = {
+        services = {
+          matrix = "vm.strangervm.ts.hillion.co.uk";
+        };
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.autoServe {
+    custom.services.matrix.enable = cfg.locations.services.matrix == config.networking.fqdn;
+  };
+}

modules/www/global.nix

@@ -2,6 +2,7 @@
 
 let
   cfg = config.custom.www.global;
+  locations = config.custom.locations.locations;
 in
 {
   options.custom.www.global = {
@@ -39,7 +40,7 @@ in
         reverse_proxy http://plex.mediaserver.ts.hillion.co.uk:8096
       '';
       virtualHosts."matrix.hillion.co.uk".extraConfig = ''
-        reverse_proxy http://vm.strangervm.ts.hillion.co.uk:8008
+        reverse_proxy http://${locations.services.matrix}:8008
       '';
       virtualHosts."unifi.hillion.co.uk".extraConfig = ''
         reverse_proxy https://unifi.unifi.ts.hillion.co.uk:8443 {