Go back to always locking after debugging issues

Author: neonichu

Sources/CoreCommands/SwiftTool.swift

@@ -105,11 +105,10 @@ extension SwiftCommand {
     public static var _errorLabel: String { "error" }
 
     private func acquireScratchDirectoryLockIfNeeded<T>(swiftTool: SwiftTool, blocking: Bool = true, _ body: () throws -> T) throws {
-        let interactive = isatty(STDOUT_FILENO) == 1
         _ = try swiftTool.fileSystem.withLock(
             on: swiftTool.scratchDirectory,
             type: .exclusive,
-            blocking: interactive ? blocking : false,
+            blocking: blocking,
             body
         )
     }