docs: def command_init(self):
          """ Initialize tree """
          self.parser = argparse.ArgumentParser(
              description="Initialize a new metadata tree")
          self.options_utils()
          self.options = self.parser.parse_args(self.arguments[2:])
          # For each path create an .fmf directory and version file
          for path in self.options.paths or ["."]:
              root = os.path.abspath(os.path.join(path, ".fmf"))
              if os.path.exists(root):
                  raise utils.FileError("{0} '{1}' already exists.".format(
                      "Directory" if os.path.isdir(root) else "File", root))
              os.makedirs(root)
              with open(os.path.join(root, "version"), "w") as version:
                  version.write("{0}\n".format(utils.VERSION))
              print("Metadata tree '{0}' successfully initialized.".format(root))