populate ip address based on hostname and populate the hostfile with other vm ips

nixos/roles/vmNetwork.nix

@@ -9,12 +9,12 @@
   inherit (builtins) elem;
   hostmap = import ./hostmap.nix;
   myhostName = config.networking.hostName;
-  # We replace our own ip with 127.0.0.1 in /etc/hosts
   # To turn the hostmap around suitable for networking.hosts the following simple code almost works
   # concatMapAttrs (hostname: ipData: { ${ipData.ipv4} = [hostname]; }) hostmap
   # but breaks as soon as we want to map two different names to the same ip.
   # So the code looks uglier than one would expect.
   globalhosts = foldAttrs (a: b: a ++ b) [] (mapAttrsToList (hostname: ipData: {${ipData.ipv4} = [hostname];}) hostmap);
+  # We replace our own ip with 127.0.0.1 in /etc/hosts
   myhosts = concatMapAttrs (ip: hosts:
     if (elem myhostName hosts)
     # nixos maps the hostname to the loopback 127.0.0.2 by default, so we exclude it here.