code: def link_file(self, path, prefixed_path, source_storage):
          
          # Skip this file if it was already copied earlier
          if prefixed_path in self.symlinked_files:
              return self.log("Skipping '%s' (already linked earlier)" % path)
          # Delete the target file if needed or break
          if not self.delete_file(path, prefixed_path, source_storage):
              return
          # The full path of the source file
          source_path = source_storage.path(path)
          # Finally link the file
          if self.dry_run:
              self.log("Pretending to link '%s'" % source_path, level=1)
          else:
              self.log("Linking '%s'" % source_path, level=1)
              full_path = self.storage.path(prefixed_path)
              try:
                  os.makedirs(os.path.dirname(full_path))
              except OSError:
                  pass
              try:
                  if os.path.lexists(full_path):
                      os.unlink(full_path)
                  os.symlink(source_path, full_path)
              except AttributeError:
                  import platform
                  raise CommandError("Symlinking is not supported by Python %s." %
                                     platform.python_version())
              except NotImplementedError:
                  import platform
                  raise CommandError("Symlinking is not supported in this "
                                     "platform (%s)." % platform.platform())
              except OSError as e:
                  raise CommandError(e)
          if prefixed_path not in self.symlinked_files:
              self.symlinked_files.append(prefixed_path)
docs: Attempt to link ``path``