1 files changed, 21 insertions, 0 deletions

diff --git a/src/WixToolset.Extensibility/Services/IParseCommandLine.cs b/src/WixToolset.Extensibility/Services/IParseCommandLine.cs
new file mode 100644
index 00000000..1b23be14
--- /dev/null
+++ b/src/WixToolset.Extensibility/Services/IParseCommandLine.cs
@@ -0,0 +1,21 @@
+// 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 WixToolset.Extensibility.Services
+{
+    using System.Collections.Generic;
+
+    public interface IParseCommandLine
+    {
+        bool IsSwitch(string arg);
+
+        bool IsSwitchAt(IEnumerable<string> args, int index);
+
+        void GetNextArgumentOrError(ref string arg);
+
+        void GetNextArgumentOrError(IList<string> args);
+
+        void GetNextArgumentAsFilePathOrError(IList<string> args, string fileType);
+
+        bool TryGetNextArgumentOrError(out string arg);
+    }
+}