Samuel Shuert | 274a4d6 | 2023-12-01 15:04:55 -0500 | [diff] [blame] | 1 | const nativeModule = require('module') |
| 2 | const path = require('path') |
| 3 | const fs = require('fs') |
| 4 | |
| 5 | function createRequire (filename) { |
| 6 | // Fallback to process.cwd() if no filename passed |
| 7 | if (!filename) { |
| 8 | filename = process.cwd() |
| 9 | } |
| 10 | |
| 11 | // If filename is dir, createRequire goes with parent directory, so we need fakepath |
| 12 | if (isDir(filename)) { |
| 13 | filename = path.join(filename, 'index.js') |
| 14 | } |
| 15 | |
| 16 | // Added in Node v12.2.0 |
| 17 | if (nativeModule.createRequire) { |
| 18 | return nativeModule.createRequire(filename) |
| 19 | } |
| 20 | |
| 21 | // Added in Node v10.12.0 and deprecated since Node v12.2.0 |
| 22 | if (nativeModule.createRequireFromPath) { |
| 23 | return nativeModule.createRequireFromPath(filename) |
| 24 | } |
| 25 | |
| 26 | // Polyfill |
| 27 | return _createRequire(filename) |
| 28 | } |
| 29 | |
| 30 | // Polyfill |
| 31 | function _createRequire (filename) { |
| 32 | const mod = new nativeModule.Module(filename, null) |
| 33 | mod.filename = filename |
| 34 | mod.paths = nativeModule.Module._nodeModulePaths(path.dirname(filename)) |
| 35 | mod._compile('module.exports = require;', filename) |
| 36 | return mod.exports |
| 37 | } |
| 38 | |
| 39 | function isDir (path) { |
| 40 | try { |
| 41 | const stat = fs.lstatSync(path) |
| 42 | return stat.isDirectory() |
| 43 | } catch (e) { |
| 44 | // lstatSync throws an error if path doesn't exist |
| 45 | return false |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | module.exports = createRequire |