Created
July 21, 2023 13:49
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Async wrappers for tempfile.NamedTemporaryFile and tempfile.NamedTemporaryFile.
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# Motivation: I had to use standard tarfile to create an archive within an async function. | |
# def pack(f): | |
# with tarfile.open(output, "w:gz") as tar: | |
# tar.add(src_dir, arcname="blah") | |
# | |
# async with temp_file() as f: | |
# asyncio.get_running_loop().run_in_executor(None, pack, f) | |
@contextlib.asynccontextmanager | |
async def temp_file() -> Iterator[pathlib.Path]: | |
"""Yields a path of a temporary file. | |
The file is removed upon the context manager exit. | |
""" | |
# test exception is propagated | |
loop, executor = asyncio.get_running_loop(), None | |
file = await loop.run_in_executor(executor, tempfile.NamedTemporaryFile) | |
try: | |
await loop.run_in_executor(executor, file.__enter__) | |
yield pathlib.Path(file.name) | |
except Exception as err: | |
await loop.run_in_executor(executor, file.__exit__, type(err), err, err.__traceback__) | |
raise | |
@contextlib.asynccontextmanager | |
async def temp_directory() -> Iterator[pathlib.Path]: | |
"""Yields a path of a temporary directoy. | |
The directory and all of its content is removed upon the context manager exit. | |
""" | |
loop, executor = asyncio.get_running_loop(), None | |
_dir = await loop.run_in_executor(executor, tempfile.NamedTemporaryFile) | |
try: | |
await loop.run_in_executor(executor, _dir.__enter__) | |
yield pathlib.Path(_dir.name) | |
except Exception as err: | |
await loop.run_in_executor(executor, _dir.__exit__, type(err), err, err.__traceback__) | |
raise | |
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