create-require.js•1.24 kB
const nativeModule = require('module')
const path = require('path')
const fs = require('fs')
function createRequire (filename) {
// Fallback to process.cwd() if no filename passed
if (!filename) {
filename = process.cwd()
}
// If filename is dir, createRequire goes with parent directory, so we need fakepath
if (isDir(filename)) {
filename = path.join(filename, 'index.js')
}
// Added in Node v12.2.0
if (nativeModule.createRequire) {
return nativeModule.createRequire(filename)
}
// Added in Node v10.12.0 and deprecated since Node v12.2.0
if (nativeModule.createRequireFromPath) {
return nativeModule.createRequireFromPath(filename)
}
// Polyfill
return _createRequire(filename)
}
// Polyfill
function _createRequire (filename) {
const mod = new nativeModule.Module(filename, null)
mod.filename = filename
mod.paths = nativeModule.Module._nodeModulePaths(path.dirname(filename))
mod._compile('module.exports = require;', filename)
return mod.exports
}
function isDir (path) {
try {
const stat = fs.lstatSync(path)
return stat.isDirectory()
} catch (e) {
// lstatSync throws an error if path doesn't exist
return false
}
}
module.exports = createRequire