index.js•1.11 kB
'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
// In case cache doesn't have parent, fall back to normal require
return parent === undefined || parent.require === undefined ? require(filePath) : parent.require(filePath);
};