Correctly find the name for Scoped packages if they're not yet

installed.

Author: Paul van Brenk

Nodejs/Product/Npm/SPI/RootPackage.cs

@@ -1,5 +1,6 @@
-// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+// Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
@@ -11,11 +12,11 @@ namespace Microsoft.NodejsTools.Npm.SPI
     internal class RootPackage : IRootPackage
     {
         public RootPackage(
-            string fullPathToRootDirectory,
-            bool showMissingDevOptionalSubPackages,
-            Dictionary<string, ModuleInfo> allModules = null,
-            int depth = 0,
-            int maxDepth = 1)
+             string fullPathToRootDirectory,
+             bool showMissingDevOptionalSubPackages,
+             Dictionary<string, ModuleInfo> allModules = null,
+             int depth = 0,
+             int maxDepth = 1)
         {
             this.Path = fullPathToRootDirectory;
             var packageJsonFile = System.IO.Path.Combine(fullPathToRootDirectory, "package.json");
@@ -47,6 +48,20 @@ public RootPackage(
             {
                 // otherwise we fail to create it completely...
             }
+
+            if (this.PackageJson != null)
+            {
+                this.Name = this.PackageJson.Name;
+            }
+            else
+            {
+                // this is the root package so the full folder name after node_nodules is the name
+                // of the package
+                var index = this.Path.IndexOf(NodejsConstants.NodeModulesFolder, StringComparison.OrdinalIgnoreCase);
+                var name = this.Path.Substring(index + NodejsConstants.NodeModulesFolder.Length);
+
+                this.Name = name.TrimStart('\\', '/');
+            }
         }
 
         public IPackageJson PackageJson { get; }
@@ -55,13 +70,13 @@ public RootPackage(
 
         public string Path { get; }
 
+        public string Name { get; }
+
         public IEnumerable<string> Homepages => this.PackageJson?.Homepages ?? Enumerable.Empty<string>();
 
         public bool HasPackageJson => this.PackageJson != null;
 
-        public string Name => this.PackageJson?.Name ?? new DirectoryInfo(this.Path).Name;
-
-        public SemverVersion Version => this.PackageJson?.Version ?? new SemverVersion();
+        public SemverVersion Version => this.PackageJson?.Version ?? SemverVersion.UnknownVersion;
 
         public IPerson Author => this.PackageJson?.Author;