Updating NPM dependencies

node_modules/resolve/lib/sync.js

@@ -1,9 +1,11 @@
-var isCore = require('./is-core');
+var isCore = require('is-core-module');
 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 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 defaultIsFile = function isFile(file) {
     try {
@@ -25,19 +27,24 @@ var defaultIsDir = function isDirectory(dir) {
     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;
-            }
+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 getPackageCandidates = function getPackageCandidates(x, start, opts) {
     var dirs = nodeModulesPaths(start, opts, x);
     for (var i = 0; i < dirs.length; i++) {
@@ -55,27 +62,29 @@ module.exports = function resolveSync(x, options) {
     var isFile = opts.isFile || defaultIsFile;
     var readFileSync = opts.readFileSync || fs.readFileSync;
     var isDirectory = opts.isDirectory || defaultIsDir;
+    var realpathSync = opts.realpathSync || defaultRealpathSync;
     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 = maybeUnwrapSymlink(path.resolve(basedir), opts);
+    var absoluteStart = maybeRealpathSync(realpathSync, path.resolve(basedir), opts);
 
     if ((/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/).test(x)) {
         var res = path.resolve(absoluteStart, x);
-        if (x === '..' || x.slice(-1) === '/') res += '/';
+        if (x === '.' || x === '..' || x.slice(-1) === '/') res += '/';
         var m = loadAsFileSync(res) || loadAsDirectorySync(res);
-        if (m) return maybeUnwrapSymlink(m, opts);
-    } else if (isCore(x)) {
+        if (m) return maybeRealpathSync(realpathSync, m, opts);
+    } else if (includeCoreModules && isCore(x)) {
         return x;
     } else {
         var n = loadNodeModulesSync(x, absoluteStart);
-        if (n) return maybeUnwrapSymlink(n, opts);
+        if (n) return maybeRealpathSync(realpathSync, n, opts);
     }
 
     var err = new Error("Cannot find module '" + x + "' from '" + parent + "'");
@@ -112,7 +121,7 @@ module.exports = function resolveSync(x, options) {
         }
         if ((/[/\\]node_modules[/\\]*$/).test(dir)) return;
 
-        var pkgfile = path.join(maybeUnwrapSymlink(dir, opts), 'package.json');
+        var pkgfile = path.join(maybeRealpathSync(realpathSync, dir, opts), 'package.json');
 
         if (!isFile(pkgfile)) {
             return loadpkg(path.dirname(dir));
@@ -133,7 +142,7 @@ module.exports = function resolveSync(x, options) {
     }
 
     function loadAsDirectorySync(x) {
-        var pkgfile = path.join(maybeUnwrapSymlink(x, opts), '/package.json');
+        var pkgfile = path.join(maybeRealpathSync(realpathSync, x, opts), '/package.json');
         if (isFile(pkgfile)) {
             try {
                 var body = readFileSync(pkgfile, 'UTF8');