[Refactor]: replace util._extend with Object.assign

Author: golopot

lib/rules/sort-comp.js

@@ -5,7 +5,6 @@
 'use strict';
 
 const has = require('has');
-const util = require('util');
 
 const Components = require('../util/Components');
 const arrayIncludes = require('array-includes');
@@ -58,7 +57,7 @@ const defaultConfig = {
 function getMethodsOrder(userConfig) {
   userConfig = userConfig || {};
 
-  const groups = util._extend(defaultConfig.groups, userConfig.groups);
+  const groups = Object.assign({}, defaultConfig.groups, userConfig.groups);
   const order = userConfig.order || defaultConfig.order;
 
   let config = [];

lib/util/Components.js

@@ -4,7 +4,6 @@
  */
 'use strict';
 
-const util = require('util');
 const doctrine = require('doctrine');
 const arrayIncludes = require('array-includes');
 
@@ -97,23 +96,25 @@ class Components {
    * @param {Object} props Additional properties to add to the component.
    */
   set(node, props) {
-    while (node && !this._list[getId(node)]) {
+    let component = this._list[getId(node)];
+    while (!component) {
       node = node.parent;
+      if (!node) {
+        return;
+      }
+      component = this._list[getId(node)];
     }
-    if (!node) {
-      return;
-    }
-    const id = getId(node);
-    let copyUsedPropTypes;
-    if (this._list[id]) {
-      // usedPropTypes is an array. _extend replaces existing array with a new one which caused issue #1309.
-      // preserving original array so it can be merged later on.
-      copyUsedPropTypes = this._list[id].usedPropTypes && this._list[id].usedPropTypes.slice();
-    }
-    this._list[id] = util._extend(this._list[id], props);
-    if (this._list[id] && props.usedPropTypes) {
-      this._list[id].usedPropTypes = mergeUsedPropTypes(copyUsedPropTypes || [], props.usedPropTypes);
-    }
+
+    Object.assign(
+      component,
+      props,
+      {
+        usedPropTypes: mergeUsedPropTypes(
+          component.usedPropTypes || [],
+          props.usedPropTypes || []
+        )
+      }
+    );
   }
 
   /**
@@ -758,7 +759,7 @@ function componentRule(rule, context) {
 
   // Update the provided rule instructions to add the component detection
   const ruleInstructions = rule(context, components, utils);
-  const updatedRuleInstructions = util._extend({}, ruleInstructions);
+  const updatedRuleInstructions = Object.assign({}, ruleInstructions);
   const propTypesInstructions = propTypesUtil(context, components, utils);
   const usedPropTypesInstructions = usedPropTypesUtil(context, components, utils);
   const defaultPropsInstructions = defaultPropsUtil(context, components, utils);