docs: def find_source_files(input_path, excludes):
      """ Get a list of filenames for all Java source files within the given
      directory.
  
      """
  
      java_files = []
  
      input_path = os.path.normpath(os.path.abspath(input_path))
  
      for dirpath, dirnames, filenames in os.walk(input_path):
          if is_excluded(dirpath, excludes):
              del dirnames[:]
              continue
  
          for filename in filenames:
              if filename.endswith(".java"):
                  java_files.append(os.path.join(dirpath, filename))
  
      return java_files