docs: def show(self, brief=False):
          """ Show metadata for each path given """
          output = []
          for path in self.options.paths or ["."]:
              if self.options.verbose:
                  utils.info("Checking {0} for metadata.".format(path))
              tree = fmf.Tree(path)
              for node in tree.prune(
                      self.options.whole, self.options.keys, self.options.names,
                      self.options.filters):
                  if brief:
                      show = node.show(brief=True)
                  else:
                      show = node.show(
                          brief=False,
                          formatting=self.options.formatting,
                          values=self.options.values)
                  # List source files when in debug mode
                  if self.options.debug:
                      for source in node.sources:
                          show += utils.color("{0}\n".format(source), "blue")
                  if show is not None:
                      output.append(show)
  
          # Print output and summary
          if brief or self.options.formatting:
              joined = "".join(output)
          else:
              joined = "\n".join(output)
          try: # pragma: no cover
              print(joined, end="")
          except UnicodeEncodeError: # pragma: no cover
              print(joined.encode('utf-8'), end="")
          if self.options.verbose:
              utils.info("Found {0}.".format(
                  utils.listed(len(output), "object")))
          self.output = joined