var isCore = require('is-core-module'); var fs = require('fs'); var path = require('path'); var getHomedir = require('./homedir'); var caller = require('./caller'); var nodeModulesPaths = require('./node-modules-paths'); var normalizeOptions = require('./normalize-options'); var realpathFS = fs.realpathSync && typeof fs.realpathSync.native === 'function' ? fs.realpathSync.native : fs.realpathSync; var homedir = getHomedir(); var defaultPaths = function () { return [ path.join(homedir, '.node_modules'), path.join(homedir, '.node_libraries') ]; }; var defaultIsFile = function isFile(file) { try { var stat = fs.statSync(file, { throwIfNoEntry: false }); } catch (e) { if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false; throw e; } return !!stat && (stat.isFile() || stat.isFIFO()); }; var defaultIsDir = function isDirectory(dir) { try { var stat = fs.statSync(dir, { throwIfNoEntry: false }); } catch (e) { if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false; throw e; } return !!stat && stat.isDirectory(); }; var defaultRealpathSync = function realpathSync(x) { try { return realpathFS(x); } catch (realpathErr) { if (realpathErr.code !== 'ENOENT') { throw realpathErr; } } return x; }; var maybeRealpathSync = function maybeRealpathSync(realpathSync, x, opts) { if (opts && opts.preserveSymlinks === false) { return realpathSync(x); } return x; }; var defaultReadPackageSync = function defaultReadPackageSync(readFileSync, pkgfile) { var body = readFileSync(pkgfile); try { var pkg = JSON.parse(body); return pkg; } catch (jsonErr) {} }; var getPackageCandidates = function getPackageCandidates(x, start, opts) { var dirs = nodeModulesPaths(start, opts, x); for (var i = 0; i < dirs.length; i++) { dirs[i] = path.join(dirs[i], x); } return dirs; }; module.exports = function resolveSync(x, options) { if (typeof x !== 'string') { throw new TypeError('Path must be a string.'); } var opts = normalizeOptions(x, options); var isFile = opts.isFile || defaultIsFile; var readFileSync = opts.readFileSync || fs.readFileSync; var isDirectory = opts.isDirectory || defaultIsDir; var realpathSync = opts.realpathSync || defaultRealpathSync; var readPackageSync = opts.readPackageSync || defaultReadPackageSync; if (opts.readFileSync && opts.readPackageSync) { throw new TypeError('`readFileSync` and `readPackageSync` are mutually exclusive.'); } var packageIterator = opts.packageIterator; var extensions = opts.extensions || ['.js']; var includeCoreModules = opts.includeCoreModules !== false; var basedir = opts.basedir || path.dirname(caller()); var parent = opts.filename || basedir; opts.paths = opts.paths || defaultPaths(); // ensure that `basedir` is an absolute path at this point, resolving against the process' current working directory var absoluteStart = maybeRealpathSync(realpathSync, path.resolve(basedir), opts); if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) { var res = path.resolve(absoluteStart, x); if (x === '.' || x === '..' || x.slice(-1) === '/') res += '/'; var m = loadAsFileSync(res) || loadAsDirectorySync(res); if (m) return maybeRealpathSync(realpathSync, m, opts); } else if (includeCoreModules && isCore(x)) { return x; } else { var n = loadNodeModulesSync(x, absoluteStart); if (n) return maybeRealpathSync(realpathSync, n, opts); } var err = new Error("Cannot find module '" + x + "' from '" + parent + "'"); err.code = 'MODULE_NOT_FOUND'; throw err; function loadAsFileSync(x) { var pkg = loadpkg(path.dirname(x)); if (pkg && pkg.dir && pkg.pkg && opts.pathFilter) { var rfile = path.relative(pkg.dir, x); var r = opts.pathFilter(pkg.pkg, x, rfile); if (r) { x = path.resolve(pkg.dir, r); // eslint-disable-line no-param-reassign } } if (isFile(x)) { return x; } for (var i = 0; i < extensions.length; i++) { var file = x + extensions[i]; if (isFile(file)) { return file; } } } function loadpkg(dir) { if (dir === '' || dir === '/') return; if (process.platform === 'win32' && (/^\w:[/\\]*$/).test(dir)) { return; } if ((/[/\\]node_modules[/\\]*$/).test(dir)) return; var pkgfile = path.join(maybeRealpathSync(realpathSync, dir, opts), 'package.json'); if (!isFile(pkgfile)) { return loadpkg(path.dirname(dir)); } var pkg = readPackageSync(readFileSync, pkgfile); if (pkg && opts.packageFilter) { // v2 will pass pkgfile pkg = opts.packageFilter(pkg, /*pkgfile,*/ dir); // eslint-disable-line spaced-comment } return { pkg: pkg, dir: dir }; } function loadAsDirectorySync(x) { var pkgfile = path.join(maybeRealpathSync(realpathSync, x, opts), '/package.json'); if (isFile(pkgfile)) { try { var pkg = readPackageSync(readFileSync, pkgfile); } catch (e) {} if (pkg && opts.packageFilter) { // v2 will pass pkgfile pkg = opts.packageFilter(pkg, /*pkgfile,*/ x); // eslint-disable-line spaced-comment } if (pkg && pkg.main) { if (typeof pkg.main !== 'string') { var mainError = new TypeError('package “' + pkg.name + '” `main` must be a string'); mainError.code = 'INVALID_PACKAGE_MAIN'; throw mainError; } if (pkg.main === '.' || pkg.main === './') { pkg.main = 'index'; } try { var m = loadAsFileSync(path.resolve(x, pkg.main)); if (m) return m; var n = loadAsDirectorySync(path.resolve(x, pkg.main)); if (n) return n; } catch (e) {} } } return loadAsFileSync(path.join(x, '/index')); } function loadNodeModulesSync(x, start) { var thunk = function () { return getPackageCandidates(x, start, opts); }; var dirs = packageIterator ? packageIterator(x, start, thunk, opts) : thunk(); for (var i = 0; i < dirs.length; i++) { var dir = dirs[i]; if (isDirectory(path.dirname(dir))) { var m = loadAsFileSync(dir); if (m) return m; var n = loadAsDirectorySync(dir); if (n) return n; } } } };