first import

sites/all/modules/variable/variable_realm/variable_realm.variable.inc

@@ -0,0 +1,61 @@
+<?php
+/**
+ * @file
+ * Variable hooks.
+ */
+
+/**
+ * Implements hook_variable_info().
+ */
+function variable_realm_variable_info($options) {
+  $variables['variable_realm_list_[variable_realm]'] = array(
+    'type' => 'multiple',
+    'group' => 'variable',
+    'multiple' => 'variable_realm',
+    'title' => t('Realm list', array(), $options),
+    'description' => t('List of variables that can be set for a realm.', array(), $options),
+    'repeat' => array(
+      'type' => 'array',
+    ),
+  );
+  $variables['variable_realm_weight_[variable_realm]'] = array(
+    'type' => 'multiple',
+    'group' => 'variable',
+    'multiple' => 'variable_realm',
+    'title' => t('Realm weight', array(), $options),
+    'description' => t('Override default weight for realm variables.', array(), $options),
+    'repeat' => array(
+      'type' => 'number',
+    ),
+  );
+  return $variables;
+}
+
+/**
+ * Implements hook_variable_type_info().
+ */
+function variable_realm_variable_type_info() {
+  $type['variable_realm'] = array(
+    'title' => t('Variable realm'),
+    'type' => 'select',
+    'options callback' => 'variable_realm_list',
+  );
+  return $type;
+}
+
+/**
+ * Implements hook_variable_settings_form_alter().
+ */
+function variable_realm_variable_settings_form_alter(&$form, &$form_state, $form_id) {
+  module_load_include('form.inc', 'variable_realm');
+  foreach (_variable_realm_variable_settings_form_list() as $realm_name => $variables) {
+    if ($realm_variables = _variable_realm_variable_settings_form_alter($form, $realm_name, variable_children($variables))) {
+      $form['#realm_variables'][$realm_name] = $realm_variables;
+    }
+  }
+  if (!empty($form['#realm_variables'])) {
+    array_unshift($form['#submit'], 'variable_realm_variable_settings_form_submit');
+    // Add form switcher and current key for each realm.
+    _variable_realm_variable_settings_form_switcher($form);
+  }
+}