introduce lib.rad-dev.mapAttrsToString, fix mc-router

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

lib/default.nix

@@ -58,5 +58,20 @@
     # fileList :: Path -> String -> [Path]
     fileList = dir: map (file: dir + "/${file}") (ls dir);
 
+    # reduce an attribute set to a string
+    #
+    # example:
+    # given attrset {host1 = "palatine-hill"; host2 = "jeeves";}
+    # and func (host: hostname: host + " is " + hostname + ", " )
+    # mapAttrsToString would return 'host1 is palatine-hill, host2 is jeeves, '
+    #
+    # args:
+    # func: an function to apply to attrSet to turn each entry into one string
+    # attrSet: an attribute set to reduce
+    #
+    # type:
+    # mapAttrsToString :: AttrSet -> (String -> Any -> String) -> String
+    mapAttrsToString =
+      func: attrSet: (lib.foldl' (cur: next: cur + next) "" (lib.mapAttrsToList func attrSet));
   };
 }

systems/palatine-hill/docker/minecraft.nix

@@ -21,7 +21,7 @@ let
     USE_AIKAR_FLAGS = "true";
     MEMORY = "8GB";
     ALLOW_FLIGHT = "true";
-    MAX_TICK_TIME = -1;
+    MAX_TICK_TIME = "-1";
   };
 
   defaultOptions = [
@@ -32,7 +32,7 @@ let
   ];
 in
 {
-  virtualisation.oci-containers = {
+  virtualisation.oci-containers.containers = {
     mc-router = {
       image = "itzg/mc-router:latest";
       extraOptions = [
@@ -40,9 +40,12 @@ in
         "--network=haproxy-net"
         "--network=minecraft-net"
       ];
-      command =
-        "--mapping=mc.alicehuston.xyz=${defaultServer}:25565"
-        + (lib.mapAttrs (hostname: url: ",${url}=${hostname}:25565") servers);
+      cmd = [
+        (
+          "--mapping=mc.alicehuston.xyz=${defaultServer}:25565"
+          + (lib.rad-dev.mapAttrsToString (hostname: url: "," + url + "=" + hostname + ":25565") servers)
+        )
+      ];
     };
     rlcraft = {
       image = "itzg/minecraft-server:java8";