--- /dev/null
+var fs = require('fs');
+var path = require('path');
+var caller = require('./caller');
+var nodeModulesPaths = require('./node-modules-paths');
+var normalizeOptions = require('./normalize-options');
+var isCore = require('is-core-module');
+
+var realpathFS = fs.realpath && typeof fs.realpath.native === 'function' ? fs.realpath.native : fs.realpath;
+
+var defaultIsFile = function isFile(file, cb) {
+ fs.stat(file, function (err, stat) {
+ if (!err) {
+ return cb(null, stat.isFile() || stat.isFIFO());
+ }
+ if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
+ return cb(err);
+ });
+};
+
+var defaultIsDir = function isDirectory(dir, cb) {
+ fs.stat(dir, function (err, stat) {
+ if (!err) {
+ return cb(null, stat.isDirectory());
+ }
+ if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
+ return cb(err);
+ });
+};
+
+var defaultRealpath = function realpath(x, cb) {
+ realpathFS(x, function (realpathErr, realPath) {
+ if (realpathErr && realpathErr.code !== 'ENOENT') cb(realpathErr);
+ else cb(null, realpathErr ? x : realPath);
+ });
+};
+
+var maybeRealpath = function maybeRealpath(realpath, x, opts, cb) {
+ if (opts && opts.preserveSymlinks === false) {
+ realpath(x, cb);
+ } else {
+ cb(null, x);
+ }
+};
+
+var defaultReadPackage = function defaultReadPackage(readFile, pkgfile, cb) {
+ readFile(pkgfile, function (readFileErr, body) {
+ if (readFileErr) cb(readFileErr);
+ else {
+ try {
+ var pkg = JSON.parse(body);
+ cb(null, pkg);
+ } catch (jsonErr) {
+ cb(null);
+ }
+ }
+ });
+};
+
+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 resolve(x, options, callback) {
+ var cb = callback;
+ var opts = options;
+ if (typeof options === 'function') {
+ cb = opts;
+ opts = {};
+ }
+ if (typeof x !== 'string') {
+ var err = new TypeError('Path must be a string.');
+ return process.nextTick(function () {
+ cb(err);
+ });
+ }
+
+ opts = normalizeOptions(x, opts);
+
+ var isFile = opts.isFile || defaultIsFile;
+ var isDirectory = opts.isDirectory || defaultIsDir;
+ var readFile = opts.readFile || fs.readFile;
+ var realpath = opts.realpath || defaultRealpath;
+ var readPackage = opts.readPackage || defaultReadPackage;
+ if (opts.readFile && opts.readPackage) {
+ var conflictErr = new TypeError('`readFile` and `readPackage` are mutually exclusive.');
+ return process.nextTick(function () {
+ cb(conflictErr);
+ });
+ }
+ 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 || [];
+
+ // ensure that `basedir` is an absolute path at this point, resolving against the process' current working directory
+ var absoluteStart = path.resolve(basedir);
+
+ maybeRealpath(
+ realpath,
+ absoluteStart,
+ opts,
+ function (err, realStart) {
+ if (err) cb(err);
+ else init(realStart);
+ }
+ );
+
+ var res;
+ function init(basedir) {
+ if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) {
+ res = path.resolve(basedir, x);
+ if (x === '.' || x === '..' || x.slice(-1) === '/') res += '/';
+ if ((/\/$/).test(x) && res === basedir) {
+ loadAsDirectory(res, opts.package, onfile);
+ } else loadAsFile(res, opts.package, onfile);
+ } else if (includeCoreModules && isCore(x)) {
+ return cb(null, x);
+ } else loadNodeModules(x, basedir, function (err, n, pkg) {
+ if (err) cb(err);
+ else if (n) {
+ return maybeRealpath(realpath, n, opts, function (err, realN) {
+ if (err) {
+ cb(err);
+ } else {
+ cb(null, realN, pkg);
+ }
+ });
+ } else {
+ var moduleError = new Error("Cannot find module '" + x + "' from '" + parent + "'");
+ moduleError.code = 'MODULE_NOT_FOUND';
+ cb(moduleError);
+ }
+ });
+ }
+
+ function onfile(err, m, pkg) {
+ if (err) cb(err);
+ else if (m) cb(null, m, pkg);
+ else loadAsDirectory(res, function (err, d, pkg) {
+ if (err) cb(err);
+ else if (d) {
+ maybeRealpath(realpath, d, opts, function (err, realD) {
+ if (err) {
+ cb(err);
+ } else {
+ cb(null, realD, pkg);
+ }
+ });
+ } else {
+ var moduleError = new Error("Cannot find module '" + x + "' from '" + parent + "'");
+ moduleError.code = 'MODULE_NOT_FOUND';
+ cb(moduleError);
+ }
+ });
+ }
+
+ function loadAsFile(x, thePackage, callback) {
+ var loadAsFilePackage = thePackage;
+ var cb = callback;
+ if (typeof loadAsFilePackage === 'function') {
+ cb = loadAsFilePackage;
+ loadAsFilePackage = undefined;
+ }
+
+ var exts = [''].concat(extensions);
+ load(exts, x, loadAsFilePackage);
+
+ function load(exts, x, loadPackage) {
+ if (exts.length === 0) return cb(null, undefined, loadPackage);
+ var file = x + exts[0];
+
+ var pkg = loadPackage;
+ if (pkg) onpkg(null, pkg);
+ else loadpkg(path.dirname(file), onpkg);
+
+ function onpkg(err, pkg_, dir) {
+ pkg = pkg_;
+ if (err) return cb(err);
+ if (dir && pkg && opts.pathFilter) {
+ var rfile = path.relative(dir, file);
+ var rel = rfile.slice(0, rfile.length - exts[0].length);
+ var r = opts.pathFilter(pkg, x, rel);
+ if (r) return load(
+ [''].concat(extensions.slice()),
+ path.resolve(dir, r),
+ pkg
+ );
+ }
+ isFile(file, onex);
+ }
+ function onex(err, ex) {
+ if (err) return cb(err);
+ if (ex) return cb(null, file, pkg);
+ load(exts.slice(1), x, pkg);
+ }
+ }
+ }
+
+ function loadpkg(dir, cb) {
+ if (dir === '' || dir === '/') return cb(null);
+ if (process.platform === 'win32' && (/^\w:[/\\]*$/).test(dir)) {
+ return cb(null);
+ }
+ if ((/[/\\]node_modules[/\\]*$/).test(dir)) return cb(null);
+
+ maybeRealpath(realpath, dir, opts, function (unwrapErr, pkgdir) {
+ if (unwrapErr) return loadpkg(path.dirname(dir), cb);
+ var pkgfile = path.join(pkgdir, 'package.json');
+ isFile(pkgfile, function (err, ex) {
+ // on err, ex is false
+ if (!ex) return loadpkg(path.dirname(dir), cb);
+
+ readPackage(readFile, pkgfile, function (err, pkgParam) {
+ if (err) cb(err);
+
+ var pkg = pkgParam;
+
+ if (pkg && opts.packageFilter) {
+ pkg = opts.packageFilter(pkg, pkgfile);
+ }
+ cb(null, pkg, dir);
+ });
+ });
+ });
+ }
+
+ function loadAsDirectory(x, loadAsDirectoryPackage, callback) {
+ var cb = callback;
+ var fpkg = loadAsDirectoryPackage;
+ if (typeof fpkg === 'function') {
+ cb = fpkg;
+ fpkg = opts.package;
+ }
+
+ maybeRealpath(realpath, x, opts, function (unwrapErr, pkgdir) {
+ if (unwrapErr) return cb(unwrapErr);
+ var pkgfile = path.join(pkgdir, 'package.json');
+ isFile(pkgfile, function (err, ex) {
+ if (err) return cb(err);
+ if (!ex) return loadAsFile(path.join(x, 'index'), fpkg, cb);
+
+ readPackage(readFile, pkgfile, function (err, pkgParam) {
+ if (err) return cb(err);
+
+ var pkg = pkgParam;
+
+ if (pkg && opts.packageFilter) {
+ pkg = opts.packageFilter(pkg, pkgfile);
+ }
+
+ 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';
+ return cb(mainError);
+ }
+ if (pkg.main === '.' || pkg.main === './') {
+ pkg.main = 'index';
+ }
+ loadAsFile(path.resolve(x, pkg.main), pkg, function (err, m, pkg) {
+ if (err) return cb(err);
+ if (m) return cb(null, m, pkg);
+ if (!pkg) return loadAsFile(path.join(x, 'index'), pkg, cb);
+
+ var dir = path.resolve(x, pkg.main);
+ loadAsDirectory(dir, pkg, function (err, n, pkg) {
+ if (err) return cb(err);
+ if (n) return cb(null, n, pkg);
+ loadAsFile(path.join(x, 'index'), pkg, cb);
+ });
+ });
+ return;
+ }
+
+ loadAsFile(path.join(x, '/index'), pkg, cb);
+ });
+ });
+ });
+ }
+
+ function processDirs(cb, dirs) {
+ if (dirs.length === 0) return cb(null, undefined);
+ var dir = dirs[0];
+
+ isDirectory(path.dirname(dir), isdir);
+
+ function isdir(err, isdir) {
+ if (err) return cb(err);
+ if (!isdir) return processDirs(cb, dirs.slice(1));
+ loadAsFile(dir, opts.package, onfile);
+ }
+
+ function onfile(err, m, pkg) {
+ if (err) return cb(err);
+ if (m) return cb(null, m, pkg);
+ loadAsDirectory(dir, opts.package, ondir);
+ }
+
+ function ondir(err, n, pkg) {
+ if (err) return cb(err);
+ if (n) return cb(null, n, pkg);
+ processDirs(cb, dirs.slice(1));
+ }
+ }
+ function loadNodeModules(x, start, cb) {
+ var thunk = function () { return getPackageCandidates(x, start, opts); };
+ processDirs(
+ cb,
+ packageIterator ? packageIterator(x, start, thunk, opts) : thunk()
+ );
+ }
+};
projects / dotfiles / .git / blobdiff