From b3715595f76c43358ef7dea17530f09f2046bb3c Mon Sep 17 00:00:00 2001
From: Steven Guh <stevenguh@gmail.com>
Date: Thu, 1 Dec 2016 10:58:16 -0800
Subject: [PATCH] Add parameter in MSBuild task to force to not use MSIE
 engine.

---
 src/React.MSBuild/TransformBabel.cs       | 112 ++++++++++++----------
 src/React.Sample.Mvc4/TransformBabel.proj |  12 +--
 2 files changed, 65 insertions(+), 59 deletions(-)

diff --git a/src/React.MSBuild/TransformBabel.cs b/src/React.MSBuild/TransformBabel.cs
index 76e081491..72ab20de0 100644
--- a/src/React.MSBuild/TransformBabel.cs
+++ b/src/React.MSBuild/TransformBabel.cs
@@ -3,7 +3,7 @@
  *  All rights reserved.
  *
  *  This source code is licensed under the BSD-style license found in the
- *  LICENSE file in the root directory of this source tree. An additional grant 
+ *  LICENSE file in the root directory of this source tree. An additional grant
  *  of patent rights can be found in the PATENTS file in the same directory.
  */
 
@@ -14,62 +14,68 @@
 
 namespace React.MSBuild
 {
-	/// <summary>
-	/// MSBuild task that handles transforming JavaScript via Babel
-	/// </summary>
-	public class TransformBabel : Task
-	{
-		/// <summary>
-		/// The ReactJS.NET environment
-		/// </summary>
-		private IReactEnvironment _environment;
+    /// <summary>
+    /// MSBuild task that handles transforming JavaScript via Babel
+    /// </summary>
+    public class TransformBabel : Task
+    {
+        /// <summary>
+        /// The ReactJS.NET environment
+        /// </summary>
+        private IReactEnvironment _environment;
 
-		/// <summary>
-		/// Directory to process JavaScript files in. All subdirectories will be searched.
-		/// </summary>
-		[Required]
-		public string SourceDir { get; set; }
+        /// <summary>
+        /// Directory to process JavaScript files in. All subdirectories will be searched.
+        /// </summary>
+        [Required]
+        public string SourceDir { get; set; }
 
-		/// <summary>
-		/// The file extension pattern of the JavaScript files to transpile. Optional, defaults to *.jsx
-		/// </summary>
-		public string FileExtensionPattern { get; set; } = "*.jsx";
+        /// <summary>
+        /// The file extension pattern of the JavaScript files to transpile. Optional, defaults to *.jsx
+        /// </summary>
+        public string FileExtensionPattern { get; set; } = "*.jsx";
 
-		/// <summary>
-		/// Executes the task.
-		/// </summary>
-		/// <returns><c>true</c> on success</returns>
-		public override bool Execute()
-		{
-			MSBuildHost.EnsureInitialized();
-			var config = React.AssemblyRegistration.Container.Resolve<IReactSiteConfiguration>();
-			config
-				.SetReuseJavaScriptEngines(false);
+        /// <summary>
+        /// Sets if Msie Engine is allowed.
+        /// </summary>
+        public bool AllowMsieEngine { get; set; } = true;
 
-			_environment = ReactEnvironment.Current;
+        /// <summary>
+        /// Executes the task.
+        /// </summary>
+        /// <returns><c>true</c> on success</returns>
+        public override bool Execute()
+        {
+            MSBuildHost.EnsureInitialized();
+            var config = React.AssemblyRegistration.Container.Resolve<IReactSiteConfiguration>();
+            config
+                .SetReuseJavaScriptEngines(false)
+                .SetAllowMsieEngine(this.AllowMsieEngine);
 
-			Log.LogMessage("Starting Babel transform");
-			var stopwatch = Stopwatch.StartNew();
-			var result = ExecuteInternal();
-			Log.LogMessage("Babel transform completed in {0}", stopwatch.Elapsed);
-			return result;
-		}
+            _environment = ReactEnvironment.Current;
 
-		/// <summary>
-		/// The core of the task. Locates all JSX files and transforms them to JavaScript.
-		/// </summary>
-		/// <returns><c>true</c> on success</returns>
-		private bool ExecuteInternal()
-		{
-			var files = Directory.EnumerateFiles(SourceDir, FileExtensionPattern, SearchOption.AllDirectories);
-			foreach (var path in files)
-			{
-				var relativePath = path.Substring(SourceDir.Length + 1);
-				Log.LogMessage(" -> Processing {0}", relativePath);
-				_environment.Babel.TransformAndSaveFile(path);
-			}
+            Log.LogMessage("Starting Babel transform");
+            var stopwatch = Stopwatch.StartNew();
+            var result = ExecuteInternal();
+            Log.LogMessage("Babel transform completed in {0}", stopwatch.Elapsed);
+            return result;
+        }
 
-			return true;
-		}
-	}
-}
+        /// <summary>
+        /// The core of the task. Locates all JSX files and transforms them to JavaScript.
+        /// </summary>
+        /// <returns><c>true</c> on success</returns>
+        private bool ExecuteInternal()
+        {
+            var files = Directory.EnumerateFiles(SourceDir, FileExtensionPattern, SearchOption.AllDirectories);
+            foreach (var path in files)
+            {
+                var relativePath = path.Substring(SourceDir.Length + 1);
+                Log.LogMessage(" -> Processing {0}", relativePath);
+                _environment.Babel.TransformAndSaveFile(path);
+            }
+
+            return true;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/React.Sample.Mvc4/TransformBabel.proj b/src/React.Sample.Mvc4/TransformBabel.proj
index b700addaa..93863721a 100644
--- a/src/React.Sample.Mvc4/TransformBabel.proj
+++ b/src/React.Sample.Mvc4/TransformBabel.proj
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="TransformBabel">    
-	<UsingTask AssemblyFile="..\React.MSBuild\bin\$(Configuration)\net40\React.MSBuild.dll" TaskName="TransformBabel" />
-	<Target Name="TransformBabel">
-		<TransformBabel SourceDir="$(MSBuildProjectDirectory)" />
-	</Target>
-</Project>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="TransformBabel">
+  <UsingTask AssemblyFile="..\React.MSBuild\bin\$(Configuration)\net40\React.MSBuild.dll" TaskName="TransformBabel" />
+  <Target Name="TransformBabel">
+    <TransformBabel SourceDir="$(MSBuildProjectDirectory)" AllowMsieEngine="False" />
+  </Target>
+</Project>
\ No newline at end of file