nixos/taskserver: Add an option for organisations

We want to declaratively specify users and organisations, so let's add
another module option "organisations", which allows us to specify users,
groups and of course organisations.

The implementation of this is not yet done and this is just to feed the
boilerplate.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

nixos/modules/services/misc/taskserver.nix

@@ -59,6 +59,26 @@ let
     ''}
   '';
 
+  orgOptions = { name, ... }: {
+    options.users = mkOption {
+      type = types.uniq (types.listOf types.str);
+      default = [];
+      example = [ "alice" "bob" ];
+      description = ''
+        A list of user names that belong to the organization.
+      '';
+    };
+
+    options.groups = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      example = [ "workers" "slackers" ];
+      description = ''
+        A list of group names that belong to the organization.
+      '';
+    };
+  };
+
 in {
 
   options = {
@@ -100,6 +120,19 @@ in {
         '';
       };
 
+      organisations = mkOption {
+        type = types.attrsOf (types.submodule orgOptions);
+        default = {};
+        example.myShinyOrganisation.users = [ "alice" "bob" ];
+        example.myShinyOrganisation.groups = [ "staff" "outsiders" ];
+        example.yetAnotherOrganisation.users = [ "foo" "bar" ];
+        description = ''
+          An attribute set where the keys name the organisation and the values
+          are a set of lists of <option>users</option> and
+          <option>groups</option>.
+        '';
+      };
+
       confirmation = mkOption {
         type = types.bool;
         default = true;