'use strict'; const path = require('path'); const {fileURLToPath} = require('url'); const resolveCwd = require('resolve-cwd'); const pkgDir = require('pkg-dir'); module.exports = filename => { const normalizedFilename = filename.startsWith('file://') ? fileURLToPath(filename) : filename; const globalDir = pkgDir.sync(path.dirname(normalizedFilename)); const relativePath = path.relative(globalDir, normalizedFilename); const pkg = require(path.join(globalDir, 'package.json')); const localFile = resolveCwd.silent(path.join(pkg.name, relativePath)); const localNodeModules = path.join(process.cwd(), 'node_modules'); const filenameInLocalNodeModules = !path.relative(localNodeModules, normalizedFilename).startsWith('..') && // On Windows, if `localNodeModules` and `normalizedFilename` are on different partitions, `path.relative()` returns the value of `normalizedFilename`, resulting in `filenameInLocalNodeModules` incorrectly becoming `true`. path.parse(localNodeModules).root === path.parse(normalizedFilename).root; // Use `path.relative()` to detect local package installation, // because __filename's case is inconsistent on Windows // Can use `===` when targeting Node.js 8 // See https://github.com/nodejs/node/issues/6624 return !filenameInLocalNodeModules && localFile && path.relative(localFile, normalizedFilename) !== '' && require(localFile); };