tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/argparse/lib/action/append/constant.js b/tools/node_modules/eslint/node_modules/argparse/lib/action/append/constant.js
new file mode 100644
index 0000000000..313f5d2efc
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/argparse/lib/action/append/constant.js
@@ -0,0 +1,47 @@
+/*:nodoc:*
+ * class ActionAppendConstant
+ *
+ * This stores a list, and appends the value specified by
+ * the const keyword argument to the list.
+ * (Note that the const keyword argument defaults to null.)
+ * The 'appendConst' action is typically useful when multiple
+ * arguments need to store constants to the same list.
+ *
+ * This class inherited from [[Action]]
+ **/
+
+'use strict';
+
+var util = require('util');
+
+var Action = require('../../action');
+
+/*:nodoc:*
+ * new ActionAppendConstant(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionAppendConstant = module.exports = function ActionAppendConstant(options) {
+  options = options || {};
+  options.nargs = 0;
+  if (typeof options.constant === 'undefined') {
+    throw new Error('constant option is required for appendAction');
+  }
+  Action.call(this, options);
+};
+util.inherits(ActionAppendConstant, Action);
+
+/*:nodoc:*
+ * ActionAppendConstant#call(parser, namespace, values, optionString) -> Void
+ * - parser (ArgumentParser): current parser
+ * - namespace (Namespace): namespace for output data
+ * - values (Array): parsed values
+ * - optionString (Array): input option string(not parsed)
+ *
+ * Call the action. Save result in namespace object
+ **/
+ActionAppendConstant.prototype.call = function (parser, namespace) {
+  var items = [].concat(namespace[this.dest] || []);
+  items.push(this.constant);
+  namespace.set(this.dest, items);
+};