1097 lines
36 KiB
Python
1097 lines
36 KiB
Python
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import asyncio
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import asyncio.events
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import functools
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import inspect
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import io
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import numbers
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import os
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import re
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import threading
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from contextlib import contextmanager
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from glob import has_magic
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from typing import TYPE_CHECKING, Iterable
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from .callbacks import DEFAULT_CALLBACK
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from .exceptions import FSTimeoutError
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from .implementations.local import LocalFileSystem, make_path_posix, trailing_sep
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from .spec import AbstractBufferedFile, AbstractFileSystem
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from .utils import glob_translate, is_exception, other_paths
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private = re.compile("_[^_]")
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iothread = [None] # dedicated fsspec IO thread
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loop = [None] # global event loop for any non-async instance
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_lock = None # global lock placeholder
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get_running_loop = asyncio.get_running_loop
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def get_lock():
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"""Allocate or return a threading lock.
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The lock is allocated on first use to allow setting one lock per forked process.
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"""
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global _lock
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if not _lock:
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_lock = threading.Lock()
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return _lock
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def reset_lock():
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"""Reset the global lock.
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This should be called only on the init of a forked process to reset the lock to
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None, enabling the new forked process to get a new lock.
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"""
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global _lock
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iothread[0] = None
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loop[0] = None
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_lock = None
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async def _runner(event, coro, result, timeout=None):
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timeout = timeout if timeout else None # convert 0 or 0.0 to None
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if timeout is not None:
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coro = asyncio.wait_for(coro, timeout=timeout)
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try:
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result[0] = await coro
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except Exception as ex:
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result[0] = ex
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finally:
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event.set()
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def sync(loop, func, *args, timeout=None, **kwargs):
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"""
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Make loop run coroutine until it returns. Runs in other thread
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Examples
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--------
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>>> fsspec.asyn.sync(fsspec.asyn.get_loop(), func, *args,
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timeout=timeout, **kwargs)
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"""
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timeout = timeout if timeout else None # convert 0 or 0.0 to None
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# NB: if the loop is not running *yet*, it is OK to submit work
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# and we will wait for it
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if loop is None or loop.is_closed():
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raise RuntimeError("Loop is not running")
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try:
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loop0 = asyncio.events.get_running_loop()
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if loop0 is loop:
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raise NotImplementedError("Calling sync() from within a running loop")
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except NotImplementedError:
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raise
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except RuntimeError:
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pass
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coro = func(*args, **kwargs)
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result = [None]
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event = threading.Event()
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asyncio.run_coroutine_threadsafe(_runner(event, coro, result, timeout), loop)
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while True:
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# this loops allows thread to get interrupted
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if event.wait(1):
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break
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if timeout is not None:
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timeout -= 1
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if timeout < 0:
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raise FSTimeoutError
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return_result = result[0]
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if isinstance(return_result, asyncio.TimeoutError):
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# suppress asyncio.TimeoutError, raise FSTimeoutError
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raise FSTimeoutError from return_result
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elif isinstance(return_result, BaseException):
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raise return_result
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else:
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return return_result
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def sync_wrapper(func, obj=None):
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"""Given a function, make so can be called in blocking contexts
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Leave obj=None if defining within a class. Pass the instance if attaching
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as an attribute of the instance.
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"""
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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self = obj or args[0]
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return sync(self.loop, func, *args, **kwargs)
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return wrapper
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@contextmanager
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def _selector_policy():
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original_policy = asyncio.get_event_loop_policy()
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try:
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if os.name == "nt" and hasattr(asyncio, "WindowsSelectorEventLoopPolicy"):
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asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
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yield
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finally:
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asyncio.set_event_loop_policy(original_policy)
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def get_loop():
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"""Create or return the default fsspec IO loop
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The loop will be running on a separate thread.
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"""
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if loop[0] is None:
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with get_lock():
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# repeat the check just in case the loop got filled between the
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# previous two calls from another thread
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if loop[0] is None:
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with _selector_policy():
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loop[0] = asyncio.new_event_loop()
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th = threading.Thread(target=loop[0].run_forever, name="fsspecIO")
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th.daemon = True
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th.start()
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iothread[0] = th
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return loop[0]
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if TYPE_CHECKING:
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import resource
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ResourceError = resource.error
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else:
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try:
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import resource
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except ImportError:
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resource = None
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ResourceError = OSError
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else:
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ResourceError = getattr(resource, "error", OSError)
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_DEFAULT_BATCH_SIZE = 128
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_NOFILES_DEFAULT_BATCH_SIZE = 1280
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def _get_batch_size(nofiles=False):
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from fsspec.config import conf
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if nofiles:
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if "nofiles_gather_batch_size" in conf:
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return conf["nofiles_gather_batch_size"]
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else:
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if "gather_batch_size" in conf:
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return conf["gather_batch_size"]
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if nofiles:
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return _NOFILES_DEFAULT_BATCH_SIZE
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if resource is None:
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return _DEFAULT_BATCH_SIZE
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try:
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soft_limit, _ = resource.getrlimit(resource.RLIMIT_NOFILE)
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except (ImportError, ValueError, ResourceError):
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return _DEFAULT_BATCH_SIZE
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if soft_limit == resource.RLIM_INFINITY:
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return -1
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else:
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return soft_limit // 8
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def running_async() -> bool:
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"""Being executed by an event loop?"""
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try:
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asyncio.get_running_loop()
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return True
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except RuntimeError:
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return False
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async def _run_coros_in_chunks(
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coros,
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batch_size=None,
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callback=DEFAULT_CALLBACK,
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timeout=None,
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return_exceptions=False,
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nofiles=False,
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):
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"""Run the given coroutines in chunks.
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Parameters
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----------
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coros: list of coroutines to run
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batch_size: int or None
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Number of coroutines to submit/wait on simultaneously.
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If -1, then it will not be any throttling. If
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None, it will be inferred from _get_batch_size()
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callback: fsspec.callbacks.Callback instance
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Gets a relative_update when each coroutine completes
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timeout: number or None
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If given, each coroutine times out after this time. Note that, since
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there are multiple batches, the total run time of this function will in
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general be longer
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return_exceptions: bool
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Same meaning as in asyncio.gather
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nofiles: bool
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If inferring the batch_size, does this operation involve local files?
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If yes, you normally expect smaller batches.
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"""
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if batch_size is None:
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batch_size = _get_batch_size(nofiles=nofiles)
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if batch_size == -1:
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batch_size = len(coros)
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assert batch_size > 0
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async def _run_coro(coro, i):
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try:
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return await asyncio.wait_for(coro, timeout=timeout), i
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except Exception as e:
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if not return_exceptions:
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raise
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return e, i
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finally:
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callback.relative_update(1)
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i = 0
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n = len(coros)
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results = [None] * n
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pending = set()
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while pending or i < n:
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while len(pending) < batch_size and i < n:
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pending.add(asyncio.ensure_future(_run_coro(coros[i], i)))
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i += 1
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if not pending:
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break
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done, pending = await asyncio.wait(pending, return_when=asyncio.FIRST_COMPLETED)
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while done:
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result, k = await done.pop()
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results[k] = result
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return results
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# these methods should be implemented as async by any async-able backend
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async_methods = [
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"_ls",
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"_cat_file",
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"_get_file",
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"_put_file",
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"_rm_file",
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"_cp_file",
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"_pipe_file",
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"_expand_path",
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"_info",
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"_isfile",
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"_isdir",
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"_exists",
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"_walk",
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"_glob",
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"_find",
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"_du",
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"_size",
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"_mkdir",
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"_makedirs",
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]
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class AsyncFileSystem(AbstractFileSystem):
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"""Async file operations, default implementations
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Passes bulk operations to asyncio.gather for concurrent operation.
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Implementations that have concurrent batch operations and/or async methods
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should inherit from this class instead of AbstractFileSystem. Docstrings are
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copied from the un-underscored method in AbstractFileSystem, if not given.
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"""
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# note that methods do not have docstring here; they will be copied
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# for _* methods and inferred for overridden methods.
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async_impl = True
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mirror_sync_methods = True
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disable_throttling = False
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def __init__(self, *args, asynchronous=False, loop=None, batch_size=None, **kwargs):
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self.asynchronous = asynchronous
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self._pid = os.getpid()
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if not asynchronous:
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self._loop = loop or get_loop()
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else:
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self._loop = None
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self.batch_size = batch_size
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super().__init__(*args, **kwargs)
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@property
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def loop(self):
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if self._pid != os.getpid():
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raise RuntimeError("This class is not fork-safe")
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return self._loop
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async def _rm_file(self, path, **kwargs):
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raise NotImplementedError
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async def _rm(self, path, recursive=False, batch_size=None, **kwargs):
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# TODO: implement on_error
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batch_size = batch_size or self.batch_size
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path = await self._expand_path(path, recursive=recursive)
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return await _run_coros_in_chunks(
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[self._rm_file(p, **kwargs) for p in reversed(path)],
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batch_size=batch_size,
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nofiles=True,
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)
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async def _cp_file(self, path1, path2, **kwargs):
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raise NotImplementedError
|
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async def _copy(
|
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self,
|
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|
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path1,
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path2,
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|
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recursive=False,
|
||
|
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on_error=None,
|
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|
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maxdepth=None,
|
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|
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batch_size=None,
|
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**kwargs,
|
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|
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):
|
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if on_error is None and recursive:
|
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on_error = "ignore"
|
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|
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elif on_error is None:
|
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on_error = "raise"
|
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|
|
|
||
|
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if isinstance(path1, list) and isinstance(path2, list):
|
||
|
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# No need to expand paths when both source and destination
|
||
|
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# are provided as lists
|
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paths1 = path1
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paths2 = path2
|
||
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else:
|
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source_is_str = isinstance(path1, str)
|
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|
|
paths1 = await self._expand_path(
|
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|
|
path1, maxdepth=maxdepth, recursive=recursive
|
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)
|
||
|
|
if source_is_str and (not recursive or maxdepth is not None):
|
||
|
|
# Non-recursive glob does not copy directories
|
||
|
|
paths1 = [
|
||
|
|
p for p in paths1 if not (trailing_sep(p) or await self._isdir(p))
|
||
|
|
]
|
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|
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if not paths1:
|
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return
|
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|
|
|
||
|
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source_is_file = len(paths1) == 1
|
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|
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dest_is_dir = isinstance(path2, str) and (
|
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trailing_sep(path2) or await self._isdir(path2)
|
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)
|
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|
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|
||
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exists = source_is_str and (
|
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|
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(has_magic(path1) and source_is_file)
|
||
|
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or (not has_magic(path1) and dest_is_dir and not trailing_sep(path1))
|
||
|
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)
|
||
|
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paths2 = other_paths(
|
||
|
|
paths1,
|
||
|
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path2,
|
||
|
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exists=exists,
|
||
|
|
flatten=not source_is_str,
|
||
|
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)
|
||
|
|
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
coros = [self._cp_file(p1, p2, **kwargs) for p1, p2 in zip(paths1, paths2)]
|
||
|
|
result = await _run_coros_in_chunks(
|
||
|
|
coros, batch_size=batch_size, return_exceptions=True, nofiles=True
|
||
|
|
)
|
||
|
|
|
||
|
|
for ex in filter(is_exception, result):
|
||
|
|
if on_error == "ignore" and isinstance(ex, FileNotFoundError):
|
||
|
|
continue
|
||
|
|
raise ex
|
||
|
|
|
||
|
|
async def _pipe_file(self, path, value, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _pipe(self, path, value=None, batch_size=None, **kwargs):
|
||
|
|
if isinstance(path, str):
|
||
|
|
path = {path: value}
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
return await _run_coros_in_chunks(
|
||
|
|
[self._pipe_file(k, v, **kwargs) for k, v in path.items()],
|
||
|
|
batch_size=batch_size,
|
||
|
|
nofiles=True,
|
||
|
|
)
|
||
|
|
|
||
|
|
async def _process_limits(self, url, start, end):
|
||
|
|
"""Helper for "Range"-based _cat_file"""
|
||
|
|
size = None
|
||
|
|
suff = False
|
||
|
|
if start is not None and start < 0:
|
||
|
|
# if start is negative and end None, end is the "suffix length"
|
||
|
|
if end is None:
|
||
|
|
end = -start
|
||
|
|
start = ""
|
||
|
|
suff = True
|
||
|
|
else:
|
||
|
|
size = size or (await self._info(url))["size"]
|
||
|
|
start = size + start
|
||
|
|
elif start is None:
|
||
|
|
start = 0
|
||
|
|
if not suff:
|
||
|
|
if end is not None and end < 0:
|
||
|
|
if start is not None:
|
||
|
|
size = size or (await self._info(url))["size"]
|
||
|
|
end = size + end
|
||
|
|
elif end is None:
|
||
|
|
end = ""
|
||
|
|
if isinstance(end, numbers.Integral):
|
||
|
|
end -= 1 # bytes range is inclusive
|
||
|
|
return f"bytes={start}-{end}"
|
||
|
|
|
||
|
|
async def _cat_file(self, path, start=None, end=None, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _cat(
|
||
|
|
self, path, recursive=False, on_error="raise", batch_size=None, **kwargs
|
||
|
|
):
|
||
|
|
paths = await self._expand_path(path, recursive=recursive)
|
||
|
|
coros = [self._cat_file(path, **kwargs) for path in paths]
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
out = await _run_coros_in_chunks(
|
||
|
|
coros, batch_size=batch_size, nofiles=True, return_exceptions=True
|
||
|
|
)
|
||
|
|
if on_error == "raise":
|
||
|
|
ex = next(filter(is_exception, out), False)
|
||
|
|
if ex:
|
||
|
|
raise ex
|
||
|
|
if (
|
||
|
|
len(paths) > 1
|
||
|
|
or isinstance(path, list)
|
||
|
|
or paths[0] != self._strip_protocol(path)
|
||
|
|
):
|
||
|
|
return {
|
||
|
|
k: v
|
||
|
|
for k, v in zip(paths, out)
|
||
|
|
if on_error != "omit" or not is_exception(v)
|
||
|
|
}
|
||
|
|
else:
|
||
|
|
return out[0]
|
||
|
|
|
||
|
|
async def _cat_ranges(
|
||
|
|
self,
|
||
|
|
paths,
|
||
|
|
starts,
|
||
|
|
ends,
|
||
|
|
max_gap=None,
|
||
|
|
batch_size=None,
|
||
|
|
on_error="return",
|
||
|
|
**kwargs,
|
||
|
|
):
|
||
|
|
"""Get the contents of byte ranges from one or more files
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
paths: list
|
||
|
|
A list of of filepaths on this filesystems
|
||
|
|
starts, ends: int or list
|
||
|
|
Bytes limits of the read. If using a single int, the same value will be
|
||
|
|
used to read all the specified files.
|
||
|
|
"""
|
||
|
|
# TODO: on_error
|
||
|
|
if max_gap is not None:
|
||
|
|
# use utils.merge_offset_ranges
|
||
|
|
raise NotImplementedError
|
||
|
|
if not isinstance(paths, list):
|
||
|
|
raise TypeError
|
||
|
|
if not isinstance(starts, Iterable):
|
||
|
|
starts = [starts] * len(paths)
|
||
|
|
if not isinstance(ends, Iterable):
|
||
|
|
ends = [ends] * len(paths)
|
||
|
|
if len(starts) != len(paths) or len(ends) != len(paths):
|
||
|
|
raise ValueError
|
||
|
|
coros = [
|
||
|
|
self._cat_file(p, start=s, end=e, **kwargs)
|
||
|
|
for p, s, e in zip(paths, starts, ends)
|
||
|
|
]
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
return await _run_coros_in_chunks(
|
||
|
|
coros, batch_size=batch_size, nofiles=True, return_exceptions=True
|
||
|
|
)
|
||
|
|
|
||
|
|
async def _put_file(self, lpath, rpath, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _put(
|
||
|
|
self,
|
||
|
|
lpath,
|
||
|
|
rpath,
|
||
|
|
recursive=False,
|
||
|
|
callback=DEFAULT_CALLBACK,
|
||
|
|
batch_size=None,
|
||
|
|
maxdepth=None,
|
||
|
|
**kwargs,
|
||
|
|
):
|
||
|
|
"""Copy file(s) from local.
|
||
|
|
|
||
|
|
Copies a specific file or tree of files (if recursive=True). If rpath
|
||
|
|
ends with a "/", it will be assumed to be a directory, and target files
|
||
|
|
will go within.
|
||
|
|
|
||
|
|
The put_file method will be called concurrently on a batch of files. The
|
||
|
|
batch_size option can configure the amount of futures that can be executed
|
||
|
|
at the same time. If it is -1, then all the files will be uploaded concurrently.
|
||
|
|
The default can be set for this instance by passing "batch_size" in the
|
||
|
|
constructor, or for all instances by setting the "gather_batch_size" key
|
||
|
|
in ``fsspec.config.conf``, falling back to 1/8th of the system limit .
|
||
|
|
"""
|
||
|
|
if isinstance(lpath, list) and isinstance(rpath, list):
|
||
|
|
# No need to expand paths when both source and destination
|
||
|
|
# are provided as lists
|
||
|
|
rpaths = rpath
|
||
|
|
lpaths = lpath
|
||
|
|
else:
|
||
|
|
source_is_str = isinstance(lpath, str)
|
||
|
|
if source_is_str:
|
||
|
|
lpath = make_path_posix(lpath)
|
||
|
|
fs = LocalFileSystem()
|
||
|
|
lpaths = fs.expand_path(lpath, recursive=recursive, maxdepth=maxdepth)
|
||
|
|
if source_is_str and (not recursive or maxdepth is not None):
|
||
|
|
# Non-recursive glob does not copy directories
|
||
|
|
lpaths = [p for p in lpaths if not (trailing_sep(p) or fs.isdir(p))]
|
||
|
|
if not lpaths:
|
||
|
|
return
|
||
|
|
|
||
|
|
source_is_file = len(lpaths) == 1
|
||
|
|
dest_is_dir = isinstance(rpath, str) and (
|
||
|
|
trailing_sep(rpath) or await self._isdir(rpath)
|
||
|
|
)
|
||
|
|
|
||
|
|
rpath = self._strip_protocol(rpath)
|
||
|
|
exists = source_is_str and (
|
||
|
|
(has_magic(lpath) and source_is_file)
|
||
|
|
or (not has_magic(lpath) and dest_is_dir and not trailing_sep(lpath))
|
||
|
|
)
|
||
|
|
rpaths = other_paths(
|
||
|
|
lpaths,
|
||
|
|
rpath,
|
||
|
|
exists=exists,
|
||
|
|
flatten=not source_is_str,
|
||
|
|
)
|
||
|
|
|
||
|
|
is_dir = {l: os.path.isdir(l) for l in lpaths}
|
||
|
|
rdirs = [r for l, r in zip(lpaths, rpaths) if is_dir[l]]
|
||
|
|
file_pairs = [(l, r) for l, r in zip(lpaths, rpaths) if not is_dir[l]]
|
||
|
|
|
||
|
|
await asyncio.gather(*[self._makedirs(d, exist_ok=True) for d in rdirs])
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
|
||
|
|
coros = []
|
||
|
|
callback.set_size(len(file_pairs))
|
||
|
|
for lfile, rfile in file_pairs:
|
||
|
|
put_file = callback.branch_coro(self._put_file)
|
||
|
|
coros.append(put_file(lfile, rfile, **kwargs))
|
||
|
|
|
||
|
|
return await _run_coros_in_chunks(
|
||
|
|
coros, batch_size=batch_size, callback=callback
|
||
|
|
)
|
||
|
|
|
||
|
|
async def _get_file(self, rpath, lpath, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _get(
|
||
|
|
self,
|
||
|
|
rpath,
|
||
|
|
lpath,
|
||
|
|
recursive=False,
|
||
|
|
callback=DEFAULT_CALLBACK,
|
||
|
|
maxdepth=None,
|
||
|
|
**kwargs,
|
||
|
|
):
|
||
|
|
"""Copy file(s) to local.
|
||
|
|
|
||
|
|
Copies a specific file or tree of files (if recursive=True). If lpath
|
||
|
|
ends with a "/", it will be assumed to be a directory, and target files
|
||
|
|
will go within. Can submit a list of paths, which may be glob-patterns
|
||
|
|
and will be expanded.
|
||
|
|
|
||
|
|
The get_file method will be called concurrently on a batch of files. The
|
||
|
|
batch_size option can configure the amount of futures that can be executed
|
||
|
|
at the same time. If it is -1, then all the files will be uploaded concurrently.
|
||
|
|
The default can be set for this instance by passing "batch_size" in the
|
||
|
|
constructor, or for all instances by setting the "gather_batch_size" key
|
||
|
|
in ``fsspec.config.conf``, falling back to 1/8th of the system limit .
|
||
|
|
"""
|
||
|
|
if isinstance(lpath, list) and isinstance(rpath, list):
|
||
|
|
# No need to expand paths when both source and destination
|
||
|
|
# are provided as lists
|
||
|
|
rpaths = rpath
|
||
|
|
lpaths = lpath
|
||
|
|
else:
|
||
|
|
source_is_str = isinstance(rpath, str)
|
||
|
|
# First check for rpath trailing slash as _strip_protocol removes it.
|
||
|
|
source_not_trailing_sep = source_is_str and not trailing_sep(rpath)
|
||
|
|
rpath = self._strip_protocol(rpath)
|
||
|
|
rpaths = await self._expand_path(
|
||
|
|
rpath, recursive=recursive, maxdepth=maxdepth
|
||
|
|
)
|
||
|
|
if source_is_str and (not recursive or maxdepth is not None):
|
||
|
|
# Non-recursive glob does not copy directories
|
||
|
|
rpaths = [
|
||
|
|
p for p in rpaths if not (trailing_sep(p) or await self._isdir(p))
|
||
|
|
]
|
||
|
|
if not rpaths:
|
||
|
|
return
|
||
|
|
|
||
|
|
lpath = make_path_posix(lpath)
|
||
|
|
source_is_file = len(rpaths) == 1
|
||
|
|
dest_is_dir = isinstance(lpath, str) and (
|
||
|
|
trailing_sep(lpath) or LocalFileSystem().isdir(lpath)
|
||
|
|
)
|
||
|
|
|
||
|
|
exists = source_is_str and (
|
||
|
|
(has_magic(rpath) and source_is_file)
|
||
|
|
or (not has_magic(rpath) and dest_is_dir and source_not_trailing_sep)
|
||
|
|
)
|
||
|
|
lpaths = other_paths(
|
||
|
|
rpaths,
|
||
|
|
lpath,
|
||
|
|
exists=exists,
|
||
|
|
flatten=not source_is_str,
|
||
|
|
)
|
||
|
|
|
||
|
|
[os.makedirs(os.path.dirname(lp), exist_ok=True) for lp in lpaths]
|
||
|
|
batch_size = kwargs.pop("batch_size", self.batch_size)
|
||
|
|
|
||
|
|
coros = []
|
||
|
|
callback.set_size(len(lpaths))
|
||
|
|
for lpath, rpath in zip(lpaths, rpaths):
|
||
|
|
get_file = callback.branch_coro(self._get_file)
|
||
|
|
coros.append(get_file(rpath, lpath, **kwargs))
|
||
|
|
return await _run_coros_in_chunks(
|
||
|
|
coros, batch_size=batch_size, callback=callback
|
||
|
|
)
|
||
|
|
|
||
|
|
async def _isfile(self, path):
|
||
|
|
try:
|
||
|
|
return (await self._info(path))["type"] == "file"
|
||
|
|
except: # noqa: E722
|
||
|
|
return False
|
||
|
|
|
||
|
|
async def _isdir(self, path):
|
||
|
|
try:
|
||
|
|
return (await self._info(path))["type"] == "directory"
|
||
|
|
except OSError:
|
||
|
|
return False
|
||
|
|
|
||
|
|
async def _size(self, path):
|
||
|
|
return (await self._info(path)).get("size", None)
|
||
|
|
|
||
|
|
async def _sizes(self, paths, batch_size=None):
|
||
|
|
batch_size = batch_size or self.batch_size
|
||
|
|
return await _run_coros_in_chunks(
|
||
|
|
[self._size(p) for p in paths], batch_size=batch_size
|
||
|
|
)
|
||
|
|
|
||
|
|
async def _exists(self, path, **kwargs):
|
||
|
|
try:
|
||
|
|
await self._info(path, **kwargs)
|
||
|
|
return True
|
||
|
|
except FileNotFoundError:
|
||
|
|
return False
|
||
|
|
|
||
|
|
async def _info(self, path, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _ls(self, path, detail=True, **kwargs):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _walk(self, path, maxdepth=None, on_error="omit", **kwargs):
|
||
|
|
if maxdepth is not None and maxdepth < 1:
|
||
|
|
raise ValueError("maxdepth must be at least 1")
|
||
|
|
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
full_dirs = {}
|
||
|
|
dirs = {}
|
||
|
|
files = {}
|
||
|
|
|
||
|
|
detail = kwargs.pop("detail", False)
|
||
|
|
try:
|
||
|
|
listing = await self._ls(path, detail=True, **kwargs)
|
||
|
|
except (FileNotFoundError, OSError) as e:
|
||
|
|
if on_error == "raise":
|
||
|
|
raise
|
||
|
|
elif callable(on_error):
|
||
|
|
on_error(e)
|
||
|
|
if detail:
|
||
|
|
yield path, {}, {}
|
||
|
|
else:
|
||
|
|
yield path, [], []
|
||
|
|
return
|
||
|
|
|
||
|
|
for info in listing:
|
||
|
|
# each info name must be at least [path]/part , but here
|
||
|
|
# we check also for names like [path]/part/
|
||
|
|
pathname = info["name"].rstrip("/")
|
||
|
|
name = pathname.rsplit("/", 1)[-1]
|
||
|
|
if info["type"] == "directory" and pathname != path:
|
||
|
|
# do not include "self" path
|
||
|
|
full_dirs[name] = pathname
|
||
|
|
dirs[name] = info
|
||
|
|
elif pathname == path:
|
||
|
|
# file-like with same name as give path
|
||
|
|
files[""] = info
|
||
|
|
else:
|
||
|
|
files[name] = info
|
||
|
|
|
||
|
|
if detail:
|
||
|
|
yield path, dirs, files
|
||
|
|
else:
|
||
|
|
yield path, list(dirs), list(files)
|
||
|
|
|
||
|
|
if maxdepth is not None:
|
||
|
|
maxdepth -= 1
|
||
|
|
if maxdepth < 1:
|
||
|
|
return
|
||
|
|
|
||
|
|
for d in dirs:
|
||
|
|
async for _ in self._walk(
|
||
|
|
full_dirs[d], maxdepth=maxdepth, detail=detail, **kwargs
|
||
|
|
):
|
||
|
|
yield _
|
||
|
|
|
||
|
|
async def _glob(self, path, maxdepth=None, **kwargs):
|
||
|
|
if maxdepth is not None and maxdepth < 1:
|
||
|
|
raise ValueError("maxdepth must be at least 1")
|
||
|
|
|
||
|
|
import re
|
||
|
|
|
||
|
|
seps = (os.path.sep, os.path.altsep) if os.path.altsep else (os.path.sep,)
|
||
|
|
ends_with_sep = path.endswith(seps) # _strip_protocol strips trailing slash
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
append_slash_to_dirname = ends_with_sep or path.endswith(
|
||
|
|
tuple(sep + "**" for sep in seps)
|
||
|
|
)
|
||
|
|
idx_star = path.find("*") if path.find("*") >= 0 else len(path)
|
||
|
|
idx_qmark = path.find("?") if path.find("?") >= 0 else len(path)
|
||
|
|
idx_brace = path.find("[") if path.find("[") >= 0 else len(path)
|
||
|
|
|
||
|
|
min_idx = min(idx_star, idx_qmark, idx_brace)
|
||
|
|
|
||
|
|
detail = kwargs.pop("detail", False)
|
||
|
|
|
||
|
|
if not has_magic(path):
|
||
|
|
if await self._exists(path, **kwargs):
|
||
|
|
if not detail:
|
||
|
|
return [path]
|
||
|
|
else:
|
||
|
|
return {path: await self._info(path, **kwargs)}
|
||
|
|
else:
|
||
|
|
if not detail:
|
||
|
|
return [] # glob of non-existent returns empty
|
||
|
|
else:
|
||
|
|
return {}
|
||
|
|
elif "/" in path[:min_idx]:
|
||
|
|
min_idx = path[:min_idx].rindex("/")
|
||
|
|
root = path[: min_idx + 1]
|
||
|
|
depth = path[min_idx + 1 :].count("/") + 1
|
||
|
|
else:
|
||
|
|
root = ""
|
||
|
|
depth = path[min_idx + 1 :].count("/") + 1
|
||
|
|
|
||
|
|
if "**" in path:
|
||
|
|
if maxdepth is not None:
|
||
|
|
idx_double_stars = path.find("**")
|
||
|
|
depth_double_stars = path[idx_double_stars:].count("/") + 1
|
||
|
|
depth = depth - depth_double_stars + maxdepth
|
||
|
|
else:
|
||
|
|
depth = None
|
||
|
|
|
||
|
|
allpaths = await self._find(
|
||
|
|
root, maxdepth=depth, withdirs=True, detail=True, **kwargs
|
||
|
|
)
|
||
|
|
|
||
|
|
pattern = glob_translate(path + ("/" if ends_with_sep else ""))
|
||
|
|
pattern = re.compile(pattern)
|
||
|
|
|
||
|
|
out = {
|
||
|
|
p: info
|
||
|
|
for p, info in sorted(allpaths.items())
|
||
|
|
if pattern.match(
|
||
|
|
(
|
||
|
|
p + "/"
|
||
|
|
if append_slash_to_dirname and info["type"] == "directory"
|
||
|
|
else p
|
||
|
|
)
|
||
|
|
)
|
||
|
|
}
|
||
|
|
|
||
|
|
if detail:
|
||
|
|
return out
|
||
|
|
else:
|
||
|
|
return list(out)
|
||
|
|
|
||
|
|
async def _du(self, path, total=True, maxdepth=None, **kwargs):
|
||
|
|
sizes = {}
|
||
|
|
# async for?
|
||
|
|
for f in await self._find(path, maxdepth=maxdepth, **kwargs):
|
||
|
|
info = await self._info(f)
|
||
|
|
sizes[info["name"]] = info["size"]
|
||
|
|
if total:
|
||
|
|
return sum(sizes.values())
|
||
|
|
else:
|
||
|
|
return sizes
|
||
|
|
|
||
|
|
async def _find(self, path, maxdepth=None, withdirs=False, **kwargs):
|
||
|
|
path = self._strip_protocol(path)
|
||
|
|
out = {}
|
||
|
|
detail = kwargs.pop("detail", False)
|
||
|
|
|
||
|
|
# Add the root directory if withdirs is requested
|
||
|
|
# This is needed for posix glob compliance
|
||
|
|
if withdirs and path != "" and await self._isdir(path):
|
||
|
|
out[path] = await self._info(path)
|
||
|
|
|
||
|
|
# async for?
|
||
|
|
async for _, dirs, files in self._walk(path, maxdepth, detail=True, **kwargs):
|
||
|
|
if withdirs:
|
||
|
|
files.update(dirs)
|
||
|
|
out.update({info["name"]: info for name, info in files.items()})
|
||
|
|
if not out and (await self._isfile(path)):
|
||
|
|
# walk works on directories, but find should also return [path]
|
||
|
|
# when path happens to be a file
|
||
|
|
out[path] = {}
|
||
|
|
names = sorted(out)
|
||
|
|
if not detail:
|
||
|
|
return names
|
||
|
|
else:
|
||
|
|
return {name: out[name] for name in names}
|
||
|
|
|
||
|
|
async def _expand_path(self, path, recursive=False, maxdepth=None):
|
||
|
|
if maxdepth is not None and maxdepth < 1:
|
||
|
|
raise ValueError("maxdepth must be at least 1")
|
||
|
|
|
||
|
|
if isinstance(path, str):
|
||
|
|
out = await self._expand_path([path], recursive, maxdepth)
|
||
|
|
else:
|
||
|
|
out = set()
|
||
|
|
path = [self._strip_protocol(p) for p in path]
|
||
|
|
for p in path: # can gather here
|
||
|
|
if has_magic(p):
|
||
|
|
bit = set(await self._glob(p, maxdepth=maxdepth))
|
||
|
|
out |= bit
|
||
|
|
if recursive:
|
||
|
|
# glob call above expanded one depth so if maxdepth is defined
|
||
|
|
# then decrement it in expand_path call below. If it is zero
|
||
|
|
# after decrementing then avoid expand_path call.
|
||
|
|
if maxdepth is not None and maxdepth <= 1:
|
||
|
|
continue
|
||
|
|
out |= set(
|
||
|
|
await self._expand_path(
|
||
|
|
list(bit),
|
||
|
|
recursive=recursive,
|
||
|
|
maxdepth=maxdepth - 1 if maxdepth is not None else None,
|
||
|
|
)
|
||
|
|
)
|
||
|
|
continue
|
||
|
|
elif recursive:
|
||
|
|
rec = set(await self._find(p, maxdepth=maxdepth, withdirs=True))
|
||
|
|
out |= rec
|
||
|
|
if p not in out and (recursive is False or (await self._exists(p))):
|
||
|
|
# should only check once, for the root
|
||
|
|
out.add(p)
|
||
|
|
if not out:
|
||
|
|
raise FileNotFoundError(path)
|
||
|
|
return sorted(out)
|
||
|
|
|
||
|
|
async def _mkdir(self, path, create_parents=True, **kwargs):
|
||
|
|
pass # not necessary to implement, may not have directories
|
||
|
|
|
||
|
|
async def _makedirs(self, path, exist_ok=False):
|
||
|
|
pass # not necessary to implement, may not have directories
|
||
|
|
|
||
|
|
async def open_async(self, path, mode="rb", **kwargs):
|
||
|
|
if "b" not in mode or kwargs.get("compression"):
|
||
|
|
raise ValueError
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
|
||
|
|
def mirror_sync_methods(obj):
|
||
|
|
"""Populate sync and async methods for obj
|
||
|
|
|
||
|
|
For each method will create a sync version if the name refers to an async method
|
||
|
|
(coroutine) and there is no override in the child class; will create an async
|
||
|
|
method for the corresponding sync method if there is no implementation.
|
||
|
|
|
||
|
|
Uses the methods specified in
|
||
|
|
- async_methods: the set that an implementation is expected to provide
|
||
|
|
- default_async_methods: that can be derived from their sync version in
|
||
|
|
AbstractFileSystem
|
||
|
|
- AsyncFileSystem: async-specific default coroutines
|
||
|
|
"""
|
||
|
|
from fsspec import AbstractFileSystem
|
||
|
|
|
||
|
|
for method in async_methods + dir(AsyncFileSystem):
|
||
|
|
if not method.startswith("_"):
|
||
|
|
continue
|
||
|
|
smethod = method[1:]
|
||
|
|
if private.match(method):
|
||
|
|
isco = inspect.iscoroutinefunction(getattr(obj, method, None))
|
||
|
|
unsync = getattr(getattr(obj, smethod, False), "__func__", None)
|
||
|
|
is_default = unsync is getattr(AbstractFileSystem, smethod, "")
|
||
|
|
if isco and is_default:
|
||
|
|
mth = sync_wrapper(getattr(obj, method), obj=obj)
|
||
|
|
setattr(obj, smethod, mth)
|
||
|
|
if not mth.__doc__:
|
||
|
|
mth.__doc__ = getattr(
|
||
|
|
getattr(AbstractFileSystem, smethod, None), "__doc__", ""
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
class FSSpecCoroutineCancel(Exception):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
def _dump_running_tasks(
|
||
|
|
printout=True, cancel=True, exc=FSSpecCoroutineCancel, with_task=False
|
||
|
|
):
|
||
|
|
import traceback
|
||
|
|
|
||
|
|
tasks = [t for t in asyncio.tasks.all_tasks(loop[0]) if not t.done()]
|
||
|
|
if printout:
|
||
|
|
[task.print_stack() for task in tasks]
|
||
|
|
out = [
|
||
|
|
{
|
||
|
|
"locals": task._coro.cr_frame.f_locals,
|
||
|
|
"file": task._coro.cr_frame.f_code.co_filename,
|
||
|
|
"firstline": task._coro.cr_frame.f_code.co_firstlineno,
|
||
|
|
"linelo": task._coro.cr_frame.f_lineno,
|
||
|
|
"stack": traceback.format_stack(task._coro.cr_frame),
|
||
|
|
"task": task if with_task else None,
|
||
|
|
}
|
||
|
|
for task in tasks
|
||
|
|
]
|
||
|
|
if cancel:
|
||
|
|
for t in tasks:
|
||
|
|
cbs = t._callbacks
|
||
|
|
t.cancel()
|
||
|
|
asyncio.futures.Future.set_exception(t, exc)
|
||
|
|
asyncio.futures.Future.cancel(t)
|
||
|
|
[cb[0](t) for cb in cbs] # cancels any dependent concurrent.futures
|
||
|
|
try:
|
||
|
|
t._coro.throw(exc) # exits coro, unless explicitly handled
|
||
|
|
except exc:
|
||
|
|
pass
|
||
|
|
return out
|
||
|
|
|
||
|
|
|
||
|
|
class AbstractAsyncStreamedFile(AbstractBufferedFile):
|
||
|
|
# no read buffering, and always auto-commit
|
||
|
|
# TODO: readahead might still be useful here, but needs async version
|
||
|
|
|
||
|
|
async def read(self, length=-1):
|
||
|
|
"""
|
||
|
|
Return data from cache, or fetch pieces as necessary
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
length: int (-1)
|
||
|
|
Number of bytes to read; if <0, all remaining bytes.
|
||
|
|
"""
|
||
|
|
length = -1 if length is None else int(length)
|
||
|
|
if self.mode != "rb":
|
||
|
|
raise ValueError("File not in read mode")
|
||
|
|
if length < 0:
|
||
|
|
length = self.size - self.loc
|
||
|
|
if self.closed:
|
||
|
|
raise ValueError("I/O operation on closed file.")
|
||
|
|
if length == 0:
|
||
|
|
# don't even bother calling fetch
|
||
|
|
return b""
|
||
|
|
out = await self._fetch_range(self.loc, self.loc + length)
|
||
|
|
self.loc += len(out)
|
||
|
|
return out
|
||
|
|
|
||
|
|
async def write(self, data):
|
||
|
|
"""
|
||
|
|
Write data to buffer.
|
||
|
|
|
||
|
|
Buffer only sent on flush() or if buffer is greater than
|
||
|
|
or equal to blocksize.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
data: bytes
|
||
|
|
Set of bytes to be written.
|
||
|
|
"""
|
||
|
|
if self.mode not in {"wb", "ab"}:
|
||
|
|
raise ValueError("File not in write mode")
|
||
|
|
if self.closed:
|
||
|
|
raise ValueError("I/O operation on closed file.")
|
||
|
|
if self.forced:
|
||
|
|
raise ValueError("This file has been force-flushed, can only close")
|
||
|
|
out = self.buffer.write(data)
|
||
|
|
self.loc += out
|
||
|
|
if self.buffer.tell() >= self.blocksize:
|
||
|
|
await self.flush()
|
||
|
|
return out
|
||
|
|
|
||
|
|
async def close(self):
|
||
|
|
"""Close file
|
||
|
|
|
||
|
|
Finalizes writes, discards cache
|
||
|
|
"""
|
||
|
|
if getattr(self, "_unclosable", False):
|
||
|
|
return
|
||
|
|
if self.closed:
|
||
|
|
return
|
||
|
|
if self.mode == "rb":
|
||
|
|
self.cache = None
|
||
|
|
else:
|
||
|
|
if not self.forced:
|
||
|
|
await self.flush(force=True)
|
||
|
|
|
||
|
|
if self.fs is not None:
|
||
|
|
self.fs.invalidate_cache(self.path)
|
||
|
|
self.fs.invalidate_cache(self.fs._parent(self.path))
|
||
|
|
|
||
|
|
self.closed = True
|
||
|
|
|
||
|
|
async def flush(self, force=False):
|
||
|
|
if self.closed:
|
||
|
|
raise ValueError("Flush on closed file")
|
||
|
|
if force and self.forced:
|
||
|
|
raise ValueError("Force flush cannot be called more than once")
|
||
|
|
if force:
|
||
|
|
self.forced = True
|
||
|
|
|
||
|
|
if self.mode not in {"wb", "ab"}:
|
||
|
|
# no-op to flush on read-mode
|
||
|
|
return
|
||
|
|
|
||
|
|
if not force and self.buffer.tell() < self.blocksize:
|
||
|
|
# Defer write on small block
|
||
|
|
return
|
||
|
|
|
||
|
|
if self.offset is None:
|
||
|
|
# Initialize a multipart upload
|
||
|
|
self.offset = 0
|
||
|
|
try:
|
||
|
|
await self._initiate_upload()
|
||
|
|
except:
|
||
|
|
self.closed = True
|
||
|
|
raise
|
||
|
|
|
||
|
|
if await self._upload_chunk(final=force) is not False:
|
||
|
|
self.offset += self.buffer.seek(0, 2)
|
||
|
|
self.buffer = io.BytesIO()
|
||
|
|
|
||
|
|
async def __aenter__(self):
|
||
|
|
return self
|
||
|
|
|
||
|
|
async def __aexit__(self, exc_type, exc_val, exc_tb):
|
||
|
|
await self.close()
|
||
|
|
|
||
|
|
async def _fetch_range(self, start, end):
|
||
|
|
raise NotImplementedError
|
||
|
|
|
||
|
|
async def _initiate_upload(self):
|
||
|
|
pass
|
||
|
|
|
||
|
|
async def _upload_chunk(self, final=False):
|
||
|
|
raise NotImplementedError
|