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, 29 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/lodash/_customDefaultsAssignIn.js b/tools/node_modules/eslint/node_modules/lodash/_customDefaultsAssignIn.js
new file mode 100644
index 0000000000..1f49e6fc4f
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/lodash/_customDefaultsAssignIn.js
@@ -0,0 +1,29 @@
+var eq = require('./eq');
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+ * of source objects to the destination object for all destination properties
+ * that resolve to `undefined`.
+ *
+ * @private
+ * @param {*} objValue The destination value.
+ * @param {*} srcValue The source value.
+ * @param {string} key The key of the property to assign.
+ * @param {Object} object The parent object of `objValue`.
+ * @returns {*} Returns the value to assign.
+ */
+function customDefaultsAssignIn(objValue, srcValue, key, object) {
+  if (objValue === undefined ||
+      (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+    return srcValue;
+  }
+  return objValue;
+}
+
+module.exports = customDefaultsAssignIn;