code: def write_script(self, script_name, contents, mode="t", blockers=()):
          
          self.delete_blockers(  # clean up old .py/.pyw w/o a script
              [os.path.join(self.script_dir, x) for x in blockers]
          )
          log.info("Installing %s script to %s", script_name, self.script_dir)
          target = os.path.join(self.script_dir, script_name)
          self.add_output(target)
  
          if self.dry_run:
              return
  
          mask = current_umask()
          ensure_directory(target)
          if os.path.exists(target):
              os.unlink(target)
          with open(target, "w" + mode) as f:
              f.write(contents)
          chmod(target, 0o777 - mask)
docs: Write an executable file to the scripts directory