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