From 21a73b3d262ac9ef5e89be0428ecaa5b6faead77 Mon Sep 17 00:00:00 2001
From: Nate McMaster <nate.mcmaster@gmail.com>
Date: Sun, 13 Sep 2020 09:54:44 -0700
Subject: [PATCH] fix: ensure clustering options is detected correctly when
 subcommands added via AddSubcommand (#393)

---
 src/CommandLineUtils/CommandLineApplication.cs    |  2 ++
 .../CommandLineProcessorTests.cs                  | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/CommandLineUtils/CommandLineApplication.cs b/src/CommandLineUtils/CommandLineApplication.cs
index 7af05ed4..705884d4 100644
--- a/src/CommandLineUtils/CommandLineApplication.cs
+++ b/src/CommandLineUtils/CommandLineApplication.cs
@@ -458,6 +458,8 @@ public void AddSubcommand(CommandLineApplication subcommand)
                 AssertCommandNameIsUnique(name, null);
             }
 
+            subcommand.Parent = this;
+
             Commands.Add(subcommand);
         }
 
diff --git a/test/CommandLineUtils.Tests/CommandLineProcessorTests.cs b/test/CommandLineUtils.Tests/CommandLineProcessorTests.cs
index c037797b..1f645864 100644
--- a/test/CommandLineUtils.Tests/CommandLineProcessorTests.cs
+++ b/test/CommandLineUtils.Tests/CommandLineProcessorTests.cs
@@ -159,6 +159,21 @@ public void ItInfersClusterOptionsCannotBeUsed_MultiCharShortNameInSubcommand()
             Assert.False(app.ClusterOptions);
         }
 
+        [Fact]
+        public void ItInfersClusterOptionsCannotBeUsed_MultiCharShortNameViaAddedSubcommand()
+        {
+            var app = new CommandLineApplication();
+            var subcmd = new CommandLineApplication
+            {
+                Name = "sub"
+            };
+            subcmd.Option("-au|--auth", "Verbose output", CommandOptionType.NoValue);
+            app.AddSubcommand(subcmd);
+            Assert.False(app.ClusterOptionsWasSetExplicitly);
+            app.Parse("sub", "-au");
+            Assert.False(app.ClusterOptions);
+        }
+
         [Fact]
         public void ItInfersClusterOptionsCannotBeUsed_MultiCharShortNameAttribute()
         {