Replacing the commandline parser in dotnet-dependency-tool-invoker with the CliCommandLineParser.

TestAssets/TestPackages/dotnet-dependency-tool-invoker/AppliedOptionsExtensions.cs

@@ -0,0 +1,30 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Linq;
+using Microsoft.DotNet.Cli.CommandLine;
+
+namespace Microsoft.DotNet.Tools.DependencyInvoker
+{
+    public static class AppliedOptionExtensions
+    {
+        public static T ValueOrDefault<T>(this AppliedOption parseResult, string alias)
+        {
+            return parseResult
+                .AppliedOptions
+                .Where(o => o.HasAlias(alias))
+                .Select(o => o.Value<T>())
+                .SingleOrDefault();
+        }
+
+        public static string SingleArgumentOrDefault(this AppliedOption parseResult, string alias)
+        {
+            return parseResult
+                .AppliedOptions
+                .Where(o => o.HasAlias(alias))
+                .Select(o => o.Arguments.Single())
+                .SingleOrDefault();
+        }
+    }
+}