modules/gre-tunnel: remove module

modules/default.nix

@@ -7,7 +7,6 @@
     ./backup
     ./clerie-firewall
     ./clerie-gc-dir
-    ./gre-tunnel
     ./minecraft-server
     ./monitoring
     ./nginx-port-forward

modules/gre-tunnel/default.nix

@@ -1,89 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.clerie.gre-tunnel;
-
-  generateInterfaceUnit = isIPv6: (name: tunnel:
-    nameValuePair "gre-tunnel-${name}" {
-        description = "GRE Tunnel - ${name}";
-        requires = [ "network-online.target" ];
-        after = [ "network.target" "network-online.target" ];
-        wantedBy = [ "multi-user.target" ];
-        environment.DEVICE = name;
-        path = with pkgs; [ iproute ];
-
-        serviceConfig = {
-          Type = "oneshot";
-          RemainAfterExit = true;
-        };
-
-        script = ''
-          ${tunnel.preSetup}
-          ip${optionalString isIPv6 " -6"} tunnel add ${name} mode ${optionalString isIPv6 "ip6"}gre remote ${tunnel.remote} local ${tunnel.local}
-          ip link set ${name} up
-          ip${optionalString isIPv6 " -6"} a add ${tunnel.address} dev ${name}
-          ${tunnel.postSetup}
-        '';
-
-        postStop = ''
-          ip link set ${name} down
-          ip tunnel del ${name}
-          ${tunnel.postShutdown}
-        '';
-      });
-
-  checkOpts = { config, ... }@moduleAttrs: {
-    options = {
-      remote = mkOption {
-        type = types.str;
-        description = "Address of reciever.";
-      };
-      local = mkOption {
-        type = types.str;
-        description = "Address our packets originate from.";
-      };
-      address = mkOption {
-        type = types.str;
-        description = "Our address in this tunnel.";
-      };
-      preSetup = mkOption {
-        type = types.str;
-        default = "";
-        description = "Commands called at the start of the interface setup.";
-      };
-      postSetup = mkOption {
-        type = types.str;
-        default = "";
-        description = "Commands called at the end of the interface setup.";
-      };
-      postShutdown = mkOption {
-        type = types.str;
-        default = "";
-        description = "Commands called after shutting down the interface.";
-      };
-    };
-  };
-
-in {
-  options = {
-    clerie.gre-tunnel = {
-      enable = mkEnableOption "Declarative Policy-Routing";
-      ipv6 = mkOption {
-        type = with types; attrsOf (submodule checkOpts);
-        default = {};
-      };
-      ipv4 = mkOption {
-        type = with types; attrsOf (submodule checkOpts);
-        default = {};
-      };
-    };
-  };
-
-  config = mkIf cfg.enable {
-    systemd.services =
-    (mapAttrs' (generateInterfaceUnit false) cfg.ipv4)
-    // (mapAttrs' (generateInterfaceUnit true) cfg.ipv6);
-  };
-}