+ for file_or_directory in get_files_recursive(subdir):
+ yield file_or_directory
+
+
+class FileWriter(object):
+ def __init__(self, filename: str) -> None:
+ self.filename = filename
+ uuid = uuid4()
+ self.tempfile = f'{filename}-{uuid}.tmp'
+ self.handle = None
+
+ def __enter__(self) -> io.TextIOWrapper:
+ assert not does_path_exist(self.tempfile)
+ self.handle = open(self.tempfile, mode="w")
+ return self.handle
+
+ def __exit__(self, exc_type, exc_val, exc_tb) -> bool:
+ if self.handle is not None:
+ self.handle.close()
+ cmd = f'/bin/mv -f {self.tempfile} {self.filename}'
+ ret = os.system(cmd)
+ if (ret >> 8) != 0:
+ raise Exception(f'{cmd} failed, exit value {ret>>8}')
+ return None
+
+
+if __name__ == '__main__':
+ import doctest
+ doctest.testmod()