chore: import upstream snapshot with attribution

static/js/generators/lua/variables.js

@@ -0,0 +1,32 @@
+/**
+ * @license
+ * Copyright 2016 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview Generating Lua for variable blocks.
+ * @author rodrigoq@google.com (Rodrigo Queiro)
+ */
+'use strict';
+
+goog.provide('Blockly.Lua.variables');
+
+goog.require('Blockly.Lua');
+
+
+Blockly.Lua['variables_get'] = function(block) {
+  // Variable getter.
+  var code = Blockly.Lua.variableDB_.getName(block.getFieldValue('VAR'),
+      Blockly.VARIABLE_CATEGORY_NAME);
+  return [code, Blockly.Lua.ORDER_ATOMIC];
+};
+
+Blockly.Lua['variables_set'] = function(block) {
+  // Variable setter.
+  var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
+      Blockly.Lua.ORDER_NONE) || '0';
+  var varName = Blockly.Lua.variableDB_.getName(
+      block.getFieldValue('VAR'), Blockly.VARIABLE_CATEGORY_NAME);
+  return varName + ' = ' + argument0 + '\n';
+};