From fcf6ea03a9b24f9bf535f70fa8d62c37ebbb94e5 Mon Sep 17 00:00:00 2001
From: Ryan Nowak <nowakra@gmail.com>
Date: Mon, 19 Feb 2018 14:03:41 -0800
Subject: [PATCH] Add IDE extensibility for project engine

---
 ...portCustomProjectEngineFactoryAttribute.cs | 28 +++++++++++++++++++
 .../ICustomProjectEngineFactoryMetadata.cs    | 12 ++++++++
 .../IProjectEngineFactory.cs                  | 13 +++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 src/Microsoft.CodeAnalysis.Razor.Workspaces/ExportCustomProjectEngineFactoryAttribute.cs
 create mode 100644 src/Microsoft.CodeAnalysis.Razor.Workspaces/ICustomProjectEngineFactoryMetadata.cs
 create mode 100644 src/Microsoft.CodeAnalysis.Razor.Workspaces/IProjectEngineFactory.cs

diff --git a/src/Microsoft.CodeAnalysis.Razor.Workspaces/ExportCustomProjectEngineFactoryAttribute.cs b/src/Microsoft.CodeAnalysis.Razor.Workspaces/ExportCustomProjectEngineFactoryAttribute.cs
new file mode 100644
index 0000000000..923cb0a66e
--- /dev/null
+++ b/src/Microsoft.CodeAnalysis.Razor.Workspaces/ExportCustomProjectEngineFactoryAttribute.cs
@@ -0,0 +1,28 @@
+// Copyright (c) .NET Foundation. 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.Composition;
+
+namespace Microsoft.CodeAnalysis.Razor
+{
+    [MetadataAttribute]
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
+    public class ExportCustomProjectEngineFactoryAttribute : ExportAttribute, ICustomProjectEngineFactoryMetadata
+    {
+        public ExportCustomProjectEngineFactoryAttribute(string configurationName)
+            : base(typeof(IProjectEngineFactory))
+        {
+            if (configurationName == null)
+            {
+                throw new ArgumentNullException(nameof(configurationName));
+            }
+
+            ConfigurationName = configurationName;
+        }
+
+        public string ConfigurationName { get; }
+
+        public bool SupportsSerialization { get; set; }
+    }
+}
diff --git a/src/Microsoft.CodeAnalysis.Razor.Workspaces/ICustomProjectEngineFactoryMetadata.cs b/src/Microsoft.CodeAnalysis.Razor.Workspaces/ICustomProjectEngineFactoryMetadata.cs
new file mode 100644
index 0000000000..3f93a6e605
--- /dev/null
+++ b/src/Microsoft.CodeAnalysis.Razor.Workspaces/ICustomProjectEngineFactoryMetadata.cs
@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.CodeAnalysis.Razor
+{
+    public interface ICustomProjectEngineFactoryMetadata
+    {
+        string ConfigurationName { get; }
+
+        bool SupportsSerialization { get; }
+    }
+}
diff --git a/src/Microsoft.CodeAnalysis.Razor.Workspaces/IProjectEngineFactory.cs b/src/Microsoft.CodeAnalysis.Razor.Workspaces/IProjectEngineFactory.cs
new file mode 100644
index 0000000000..903c47842b
--- /dev/null
+++ b/src/Microsoft.CodeAnalysis.Razor.Workspaces/IProjectEngineFactory.cs
@@ -0,0 +1,13 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.AspNetCore.Razor.Language;
+
+namespace Microsoft.CodeAnalysis.Razor
+{
+    public interface IProjectEngineFactory
+    {
+        RazorProjectEngine Create(RazorConfiguration configuration, RazorProjectFileSystem fileSystem, Action<RazorProjectEngineBuilder> configure);
+    }
+}