update

node_modules/resolve/lib/async.js

@@ -0,0 +1,271 @@
+var core = require('./core');
+var fs = require('fs');
+var path = require('path');
+var caller = require('./caller.js');
+var nodeModulesPaths = require('./node-modules-paths.js');
+var normalizeOptions = require('./normalize-options.js');
+
+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 maybeUnwrapSymlink = function maybeUnwrapSymlink(x, opts, cb) {
+    if (opts && opts.preserveSymlinks === false) {
+        fs.realpath(x, function (realPathErr, realPath) {
+            if (realPathErr && realPathErr.code !== 'ENOENT') cb(realPathErr);
+            else cb(null, realPathErr ? x : realPath);
+        });
+    } else {
+        cb(null, x);
+    }
+};
+
+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 extensions = opts.extensions || ['.js'];
+    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);
+
+    maybeUnwrapSymlink(
+        absoluteStart,
+        opts,
+        function (err, realStart) {
+            if (err) cb(err);
+            else init(realStart);
+        }
+    );
+
+    var res;
+    function init(basedir) {
+        if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) {
+            res = path.resolve(basedir, x);
+            if (x === '..' || x.slice(-1) === '/') res += '/';
+            if ((/\/$/).test(x) && res === basedir) {
+                loadAsDirectory(res, opts.package, onfile);
+            } else loadAsFile(res, opts.package, onfile);
+        } else loadNodeModules(x, basedir, function (err, n, pkg) {
+            if (err) cb(err);
+            else if (core[x]) return cb(null, x);
+            else if (n) {
+                return maybeUnwrapSymlink(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) {
+                maybeUnwrapSymlink(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);
+
+        var pkgfile = path.join(dir, 'package.json');
+        isFile(pkgfile, function (err, ex) {
+            // on err, ex is false
+            if (!ex) return loadpkg(path.dirname(dir), cb);
+
+            readFile(pkgfile, function (err, body) {
+                if (err) cb(err);
+                try { var pkg = JSON.parse(body); } catch (jsonErr) {}
+
+                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;
+        }
+
+        var pkgfile = path.join(x, 'package.json');
+        isFile(pkgfile, function (err, ex) {
+            if (err) return cb(err);
+            if (!ex) return loadAsFile(path.join(x, 'index'), fpkg, cb);
+
+            readFile(pkgfile, function (err, body) {
+                if (err) return cb(err);
+                try {
+                    var pkg = JSON.parse(body);
+                } catch (jsonErr) {}
+
+                if (opts.packageFilter) {
+                    pkg = opts.packageFilter(pkg, pkgfile);
+                }
+
+                if (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(dir, isdir);
+
+        function isdir(err, isdir) {
+            if (err) return cb(err);
+            if (!isdir) return processDirs(cb, dirs.slice(1));
+            var file = path.join(dir, x);
+            loadAsFile(file, opts.package, onfile);
+        }
+
+        function onfile(err, m, pkg) {
+            if (err) return cb(err);
+            if (m) return cb(null, m, pkg);
+            loadAsDirectory(path.join(dir, x), 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) {
+        processDirs(cb, nodeModulesPaths(start, opts, x));
+    }
+};