--- /dev/null
+'use strict';
+const path = require('path');
+const resolveFrom = require('resolve-from');
+const parentModule = require('parent-module');
+
+module.exports = moduleId => {
+ if (typeof moduleId !== 'string') {
+ throw new TypeError('Expected a string');
+ }
+
+ const parentPath = parentModule(__filename);
+
+ const filePath = resolveFrom(path.dirname(parentPath), moduleId);
+
+ const oldModule = require.cache[filePath];
+ // Delete itself from module parent
+ if (oldModule && oldModule.parent) {
+ let i = oldModule.parent.children.length;
+
+ while (i--) {
+ if (oldModule.parent.children[i].id === filePath) {
+ oldModule.parent.children.splice(i, 1);
+ }
+ }
+ }
+
+ delete require.cache[filePath]; // Delete module from cache
+
+ const parent = require.cache[parentPath]; // If `filePath` and `parentPath` are the same, cache will already be deleted so we won't get a memory leak in next step
+
+ return parent === undefined ? require(filePath) : parent.require(filePath); // In case cache doesn't have parent, fall back to normal require
+};