Fix build warnings

Author: SimplyDanny

Package.swift

@@ -138,7 +138,8 @@ let package = Package(
                 .target(name: "MacOSPlatform", condition: .when(platforms: [.macOS])),
                 .product(name: "ArgumentParser", package: "swift-argument-parser"),
             ],
-            path: "Tools/build-swiftly-release"
+            path: "Tools/build-swiftly-release",
+            exclude: ["musl-clang"],
         ),
         .target(
             name: "LinuxPlatform",

Sources/TestSwiftly/TestSwiftly.swift

@@ -92,13 +92,13 @@ struct TestSwiftly: AsyncParsableCommand {
             Foundation.exit(2)
         }
 
-        guard case let swiftlyArchive = FilePath(swiftlyArchive) else { fatalError("") }
+        let swiftlyArchiveFile = FilePath(swiftlyArchive)
 
         print("Extracting swiftly release")
 #if os(Linux)
-        try await sys.tar().extract(.verbose, .compressed, .archive(swiftlyArchive)).run(currentPlatform, quiet: false)
+        try await sys.tar().extract(.verbose, .compressed, .archive(swiftlyArchiveFile)).run(currentPlatform, quiet: false)
 #elseif os(macOS)
-        try await sys.installer(.verbose, .pkg(swiftlyArchive), .target("CurrentUserHomeDirectory")).run(currentPlatform, quiet: false)
+        try await sys.installer(.verbose, .pkg(swiftlyArchiveFile), .target("CurrentUserHomeDirectory")).run(currentPlatform, quiet: false)
 #endif
 
 #if os(Linux)

Tools/generate-command-models/GenerateCommandModels.swift

@@ -278,11 +278,12 @@ struct GenerateCommandModels: AsyncParsableCommand {
 
         let configFunc: String
         if path.count == 0 {
+            let genArgs = options.asArgs + vars.asArgs
             configFunc = """
             public func config() -> Configuration {
-                var genArgs: [String] = []
+                \(genArgs.isEmpty ? "let" : "var") genArgs: [String] = []
 
-                \((options.asArgs + vars.asArgs).joined(separator: "\n" + indent(1)))
+                \((genArgs).joined(separator: "\n" + indent(1)))
 
                 return Configuration(
                     executable: self.executable,