update

node_modules/resolve/lib/sync.js

@@ -0,0 +1,172 @@
+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) {
+    try {
+        var stat = fs.statSync(file);
+    } catch (e) {
+        if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
+        throw e;
+    }
+    return stat.isFile() || stat.isFIFO();
+};
+
+var defaultIsDir = function isDirectory(dir) {
+    try {
+        var stat = fs.statSync(dir);
+    } catch (e) {
+        if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
+        throw e;
+    }
+    return stat.isDirectory();
+};
+
+var maybeUnwrapSymlink = function maybeUnwrapSymlink(x, opts) {
+    if (opts && opts.preserveSymlinks === false) {
+        try {
+            return fs.realpathSync(x);
+        } catch (realPathErr) {
+            if (realPathErr.code !== 'ENOENT') {
+                throw realPathErr;
+            }
+        }
+    }
+    return x;
+};
+
+module.exports = function (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 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 = maybeUnwrapSymlink(path.resolve(basedir), opts);
+
+    if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) {
+        var res = path.resolve(absoluteStart, x);
+        if (x === '..' || x.slice(-1) === '/') res += '/';
+        var m = loadAsFileSync(res) || loadAsDirectorySync(res);
+        if (m) return maybeUnwrapSymlink(m, opts);
+    } else if (core[x]) {
+        return x;
+    } else {
+        var n = loadNodeModulesSync(x, absoluteStart);
+        if (n) return maybeUnwrapSymlink(n, opts);
+    }
+
+    if (core[x]) return x;
+
+    var err = new Error("Cannot find module '" + x + "' from '" + parent + "'");
+    err.code = 'MODULE_NOT_FOUND';
+    throw err;
+
+    function loadAsFileSync(x) {
+        var pkg = loadpkg(path.dirname(x));
+
+        if (pkg && pkg.dir && pkg.pkg && opts.pathFilter) {
+            var rfile = path.relative(pkg.dir, x);
+            var r = opts.pathFilter(pkg.pkg, x, rfile);
+            if (r) {
+                x = path.resolve(pkg.dir, r); // eslint-disable-line no-param-reassign
+            }
+        }
+
+        if (isFile(x)) {
+            return x;
+        }
+
+        for (var i = 0; i < extensions.length; i++) {
+            var file = x + extensions[i];
+            if (isFile(file)) {
+                return file;
+            }
+        }
+    }
+
+    function loadpkg(dir) {
+        if (dir === '' || dir === '/') return;
+        if (process.platform === 'win32' && (/^\w:[/\\]*$/).test(dir)) {
+            return;
+        }
+        if ((/[/\\]node_modules[/\\]*$/).test(dir)) return;
+
+        var pkgfile = path.join(dir, 'package.json');
+
+        if (!isFile(pkgfile)) {
+            return loadpkg(path.dirname(dir));
+        }
+
+        var body = readFileSync(pkgfile);
+
+        try {
+            var pkg = JSON.parse(body);
+        } catch (jsonErr) {}
+
+        if (pkg && opts.packageFilter) {
+            pkg = opts.packageFilter(pkg, dir);
+        }
+
+        return { pkg: pkg, dir: dir };
+    }
+
+    function loadAsDirectorySync(x) {
+        var pkgfile = path.join(x, '/package.json');
+        if (isFile(pkgfile)) {
+            try {
+                var body = readFileSync(pkgfile, 'UTF8');
+                var pkg = JSON.parse(body);
+            } catch (e) {}
+
+            if (opts.packageFilter) {
+                pkg = opts.packageFilter(pkg, x);
+            }
+
+            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';
+                    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 dirs = nodeModulesPaths(start, opts, x);
+        for (var i = 0; i < dirs.length; i++) {
+            var dir = dirs[i];
+            if (isDirectory(dir)) {
+                var m = loadAsFileSync(path.join(dir, '/', x));
+                if (m) return m;
+                var n = loadAsDirectorySync(path.join(dir, '/', x));
+                if (n) return n;
+            }
+        }
+    }
+};