| '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 cwd = parentPath ? path.dirname(parentPath) : __dirname; |
| const filePath = resolveFrom(cwd, 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 |
| }; |