Warn user when Node is not installed

Show a dialog when the user tries to debug a js file in Open Folder,
and Node.js is not installed.

Author: Paul van Brenk

Nodejs/Product/Nodejs/Debugger/NodeDebugProvider.cs

@@ -1,15 +1,18 @@
-// 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.ComponentModel.Composition;
 using System.IO;
+using System.Threading.Tasks;
 using Microsoft.NodejsTools.Project;
 using Microsoft.NodejsTools.Telemetry;
 using Microsoft.VisualStudio.Setup.Configuration;
+using Microsoft.VisualStudio.Shell;
 using Microsoft.VisualStudio.Shell.Interop;
 using Microsoft.VisualStudio.Workspace;
 using Microsoft.VisualStudio.Workspace.Debug;
 using Microsoft.VisualStudio.Workspace.Extensions.VS.Debug;
+using Microsoft.VisualStudio.Workspace.VSIntegration.Contracts;
 using Newtonsoft.Json.Linq;
 
 namespace Microsoft.NodejsTools.Debugger
@@ -46,10 +49,36 @@ internal class NodeJsDebugLaunchProvider : IVsDebugLaunchTargetProvider
     ""configuration"": ""#/definitions/nodejsFile""
 }";
 
+        [Import]
+        public SVsServiceProvider ServiceProvider { get; set; }
+
+        [Import]
+        public IVsFolderWorkspaceService WorkspaceService { get; set; }
+
         public void SetupDebugTargetInfo(ref VsDebugTargetInfo vsDebugTargetInfo, DebugLaunchActionContext debugLaunchContext)
         {
             var nodeExe = debugLaunchContext.LaunchConfiguration.GetValue(NodeExeKey, defaultValue: Nodejs.GetPathToNodeExecutableFromEnvironment());
 
+            if (string.IsNullOrEmpty(nodeExe))
+            {
+                var workspace = this.WorkspaceService.CurrentWorkspace;
+                workspace.JTF.Run(async () =>
+                {
+                    await workspace.JTF.SwitchToMainThreadAsync();
+
+                    VsShellUtilities.ShowMessageBox(this.ServiceProvider,
+                        string.Format(Resources.NodejsNotInstalledAnyCode, LaunchConfigurationConstants.LaunchJsonFileName),
+                        Resources.NodejsNotInstalledShort,
+                        OLEMSGICON.OLEMSGICON_CRITICAL,
+                        OLEMSGBUTTON.OLEMSGBUTTON_OK,
+                        OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST);
+                });
+
+                // This isn't pretty but the only way to not get an additional
+                // dialog box, after the one we show.
+                throw new TaskCanceledException();
+            }
+
             var nodeVersion = Nodejs.GetNodeVersion(nodeExe);
             if (nodeVersion >= new Version(8, 0) || NodejsProjectLauncher.CheckDebugProtocolOption())
             {

Nodejs/Product/Nodejs/Nodejs.csproj

@@ -114,6 +114,10 @@
     <Reference Include="Microsoft.VisualStudio.TextManager.Interop.12.0, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <EmbedInteropTypes>True</EmbedInteropTypes>
     </Reference>
+    <Reference Include="Microsoft.VisualStudio.Threading, Version=15.3.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.VisualStudio.Threading.15.3.83\lib\net45\Microsoft.VisualStudio.Threading.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="Microsoft.VisualStudio.Utilities, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
     <Reference Include="Microsoft.VisualStudio.Utilities.Internal, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\..\packages\Microsoft.VisualStudio.Utilities.Internal.14.0.72-masterF9EB1D39\lib\net45\Microsoft.VisualStudio.Utilities.Internal.dll</HintPath>
@@ -134,6 +138,7 @@
       <HintPath>..\..\packages\Microsoft.VisualStudio.Workspaces.15.0.215-pre\lib\net46\Microsoft.VisualStudio.Workspace.Extensions.VS.dll</HintPath>
       <Private>False</Private>
     </Reference>
+    <Reference Include="Microsoft.VisualStudio.Workspace.VSIntegration.Contracts, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
     <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>..\..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
       <Private>False</Private>
@@ -195,7 +200,6 @@
     <Reference Include="System.Data" />
     <Reference Include="System.Design" />
     <Reference Include="System.Drawing" />
-    <Reference Include="System.Runtime.Serialization" />
     <Reference Include="System.Web" />
     <Reference Include="System.Web.Extensions" />
     <Reference Include="System.Windows.Forms" />

Nodejs/Product/Nodejs/Resources.Designer.cs

@@ -668,4 +668,8 @@ Error retrieving websocket debug proxy information from web.config.</value>
   <data name="NpmExecuteCommand" xml:space="preserve">
     <value>Executes npm command. If solution contains multiple projects, specify target project using .npm [ProjectName] &lt;npm arguments&gt;</value>
   </data>
+  <data name="NodejsNotInstalledAnyCode" xml:space="preserve">
+    <value>Could not find a Node.js runtime on your computer.  Please download and install the current Node.js release from 'https://nodejs.org', or specify the location of your Node.exe in the '{0}'.</value>
+    <comment>Template contains a filename, like launch.json</comment>
+  </data>
 </root>

Nodejs/Product/Nodejs/Resources.resx

@@ -7,6 +7,7 @@
   <package id="Microsoft.VisualStudio.RemoteControl" version="14.0.262-masterA5CACE98" targetFramework="net46" />
   <package id="Microsoft.VisualStudio.Setup.Configuration.Interop" version="1.11.2273" targetFramework="net46" developmentDependency="true" />
   <package id="Microsoft.VisualStudio.Telemetry" version="15.3.789-masterCC863119" targetFramework="net46" />
+  <package id="Microsoft.VisualStudio.Threading" version="15.3.83" targetFramework="net46" />
   <package id="Microsoft.VisualStudio.Utilities.Internal" version="14.0.72-masterF9EB1D39" targetFramework="net46" />
   <package id="Microsoft.VisualStudio.Validation" version="15.3.15" targetFramework="net46" />
   <package id="Microsoft.VisualStudio.Workspaces" version="15.0.215-pre" targetFramework="net46" />