1 files changed, 41 insertions, 0 deletions

diff --git a/src/internal/WixInternal.MSTestSupport/VswhereRunner.cs b/src/internal/WixInternal.MSTestSupport/VswhereRunner.cs
new file mode 100644
index 00000000..f6ff2116
--- /dev/null
+++ b/src/internal/WixInternal.MSTestSupport/VswhereRunner.cs
@@ -0,0 +1,41 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixInternal.MSTestSupport
+{
+    using System;
+    using System.IO;
+
+    public class VswhereRunner : ExternalExecutable
+    {
+        private static readonly string VswhereRelativePath = @"Microsoft Visual Studio\Installer\vswhere.exe";
+
+        private static readonly object InitLock = new object();
+        private static bool Initialized;
+        private static VswhereRunner Instance;
+
+        public static ExternalExecutableResult Execute(string args, bool mergeErrorIntoOutput = false) =>
+            InitAndExecute(args, mergeErrorIntoOutput);
+
+        private static ExternalExecutableResult InitAndExecute(string args, bool mergeErrorIntoOutput)
+        {
+            lock (InitLock)
+            {
+                if (!Initialized)
+                {
+                    Initialized = true;
+                    var vswherePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86), VswhereRelativePath);
+                    if (!File.Exists(vswherePath))
+                    {
+                        throw new InvalidOperationException($"Failed to find vswhere at: {vswherePath}");
+                    }
+
+                    Instance = new VswhereRunner(vswherePath);
+                }
+            }
+
+            return Instance.Run(args, mergeErrorIntoOutput);
+        }
+
+        private VswhereRunner(string exePath) : base(exePath) { }
+    }
+}