code: def discover(glob_pattern):
      
      in_paths = glob.glob(glob_pattern)
      names = {
          extract_env_name(path): path
          for path in in_paths
      }
      return order_by_refs([
          {'name': name, 'refs': Environment.parse_references(in_path)}
          for name, in_path in names.items()
      ])
docs: Find all files matching given glob_pattern,
      parse them, and return list of environments:
  
      >>> envs = discover("requirements/*.in")
      >>> # print(envs)
      >>> envs == [
      ...     {'name': 'base', 'refs': set()},
      ...     {'name': 'py27', 'refs': set()},
      ...     {'name': 'test', 'refs': {'base'}},
      ...     {'name': 'local', 'refs': {'test'}},
      ...     {'name': 'local27', 'refs': {'test', 'py27'}},
      ...     {'name': 'testwin', 'refs': {'test'}},
      ... ]
      True