Fix swiftly run -h to show help message (#452)

Author: gibachan

Sources/Swiftly/Run.swift

@@ -63,7 +63,7 @@ struct Run: SwiftlyCommand {
         var config = try await Config.load(ctx)
 
         // Handle the specific case where help is requested of the run subcommand
-        if command == ["--help"] {
+        if command == ["--help"] || command == ["-h"] {
             throw CleanExit.helpRequest(self)
         }
 

Tests/SwiftlyTests/RunTests.swift

@@ -1,3 +1,4 @@
+import ArgumentParser
 import Foundation
 @testable import Swiftly
 @testable import SwiftlyCore
@@ -84,4 +85,23 @@ import Testing
         #expect(["swift", "build"] == command)
         #expect(nil == selector)
     }
+
+    /// Tests the help functionality of the `run` command
+    @Test(.testHomeMockedToolchain()) func runHelp() async throws {
+        // Test --help is handled correctly
+        do {
+            try await SwiftlyTests.runCommand(Run.self, ["run", "--help"])
+            #expect(false)
+        } catch {
+            #expect(error is CleanExit)
+        }
+
+        // Test -h is handled correctly
+        do {
+            try await SwiftlyTests.runCommand(Run.self, ["run", "-h"])
+            #expect(false)
+        } catch {
+            #expect(error is CleanExit)
+        }
+    }
 }