Added test and removed flag search loop

Author: Miguel Perez

Sources/ArgumentParser/Parsable Types/CommandConfiguration.swift

@@ -71,6 +71,8 @@ public struct CommandConfiguration {
   ///     with a simulated Boolean property named `help`. If `helpNames` is
   ///     `nil`, the names are inherited from the parent command, if any, or
   ///     `-h` and `--help`.
+  ///   - includeSuperCommandInHelp: When set to false the super command will not be included in
+  ///     the help printout.
   public init(
     commandName: String? = nil,
     abstract: String = "",

Sources/ArgumentParser/Usage/HelpGenerator.swift

@@ -146,11 +146,10 @@ internal struct HelpGenerator {
     var alreadySeenElements = Set<Section.Element>()
 
     var commandsToShowHelp = [ParsableCommand.Type]()
-    for commandType in commandStack {
-      // This will remove all super commands in the event that a subcommand does not
-      // want to include their respective help
-      if !commandType.includeSuperCommandInHelp { commandsToShowHelp.removeAll() }
-      commandsToShowHelp.append(commandType)
+    if let commandType = commandStack.last, !commandType.includeSuperCommandInHelp {
+        commandsToShowHelp.append(commandType)
+    } else {
+        commandsToShowHelp = commandStack
     }
 
     for commandType in commandsToShowHelp {

Tests/ArgumentParserUnitTests/HelpGenerationTests.swift

@@ -431,4 +431,48 @@ extension HelpGenerationTests {
 
     """)
   }
+    
+  struct Foo: ParsableCommand {
+    public static var configuration = CommandConfiguration(
+      commandName: "foo",
+      abstract: "Perform some foo",
+      subcommands: [
+        Bar.self
+      ],
+      helpNames: [.short, .long, .customLong("help", withSingleDash: true)])
+        
+    @Option(help: "Name for foo")
+    var fooName: String?
+        
+    public init() {}
+  }
+
+  struct Bar: ParsableCommand {
+    static let configuration = CommandConfiguration(
+      commandName: "bar",
+      _superCommandName: "foo",
+      abstract: "Perform bar operations",
+      helpNames: [.short, .long, .customLong("help", withSingleDash: true)])
+        
+    static let includeSuperCommandInHelp: Bool = false
+            
+    @Option(help: "Bar Strength")
+    var barStrength: String?
+        
+    public init() {}
+  }
+
+  func testHelpExcludingSuperCommand() throws {
+    AssertHelp(for: Bar.self, root: Foo.self, equals: """
+    OVERVIEW: Perform bar operations
+
+    USAGE: foo bar [--bar-strength <bar-strength>]
+
+    OPTIONS:
+      --bar-strength <bar-strength>
+                              Bar Strength
+      -help, -h, --help       Show help information.
+    
+    """)
+  }
 }