upstream/mercurial-mirror Files · mercurial/typelib.py

sparse: reliably avoid writing to store without a lock...

sparse: reliably avoid writing to store without a lock With the code as written before this patch we can still end up writing to store in `debugsparse`. Obviously we'll write to it if by accident a store requirement is modified, but more importantly we write to it if another concurrent transaction modifies the requirements file on disk. We can't rule this out since we're not holding the store lock, so it's better to explicitly pass a permission to write instead of inferring it based on file contents.

Matt Harbison - - Load All Authors

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      # typelib.py - type hint aliases and support

      #

      # Copyright 2022 Matt Harbison <matt_harbison@yahoo.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      import typing

      from typing import (

          Callable,

      )

      # Note: this is slightly different from pycompat.TYPE_CHECKING, as using

      # pycompat causes the BinaryIO_Proxy type to be resolved to ``object`` when

      # used as the base class during a pytype run.

      TYPE_CHECKING = typing.TYPE_CHECKING

      # The BinaryIO class provides empty methods, which at runtime means that

      # ``__getattr__`` on the proxy classes won't get called for the methods that

      # should delegate to the internal object.  So to avoid runtime changes because

      # of the required typing inheritance, just use BinaryIO when typechecking, and

      # ``object`` otherwise.

      if TYPE_CHECKING:

          from typing import (

              BinaryIO,

              Union,

          )

          from . import (

              node,

              posix,

              windows,

          )

          BinaryIO_Proxy = BinaryIO

          CacheStat = Union[posix.cachestat, windows.cachestat]

          NodeConstants = node.sha1nodeconstants

      else:

          from typing import Any

          BinaryIO_Proxy = object

          CacheStat = Any

          NodeConstants = Any

      # scmutil.getuipathfn() related callback.

      UiPathFn = Callable[[bytes], bytes]

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				# typelib.py - type hint aliases and support
				#
				# Copyright 2022 Matt Harbison <matt_harbison@yahoo.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				import typing

				from typing import (
				Callable,
				)

				# Note: this is slightly different from pycompat.TYPE_CHECKING, as using
				# pycompat causes the BinaryIO_Proxy type to be resolved to ``object`` when
				# used as the base class during a pytype run.
				TYPE_CHECKING = typing.TYPE_CHECKING


				# The BinaryIO class provides empty methods, which at runtime means that
				# ``__getattr__`` on the proxy classes won't get called for the methods that
				# should delegate to the internal object. So to avoid runtime changes because
				# of the required typing inheritance, just use BinaryIO when typechecking, and
				# ``object`` otherwise.
				if TYPE_CHECKING:
				from typing import (
				BinaryIO,
				Union,
				)

				from . import (
				node,
				posix,
				windows,
				)

				BinaryIO_Proxy = BinaryIO
				CacheStat = Union[posix.cachestat, windows.cachestat]
				NodeConstants = node.sha1nodeconstants
				else:
				from typing import Any

				BinaryIO_Proxy = object
				CacheStat = Any
				NodeConstants = Any

				# scmutil.getuipathfn() related callback.
				UiPathFn = Callable[[bytes], bytes]