mercurial/cext/osutil.pyi

interfaces: introduce and use a protocol class for the `charencoding` module

See f2832de2a46c for details when this was done for the `bdiff` module.

This lets us dump the hack where the `pure` implementation was imported during
the type checking phase to provide signatures for the module methods it
provides.  Now the protocol classes are starting to shine, because these methods
are provided by `pure.charencoding` and `cext.parsers`, and references to
`cffi.charencoding` and `cext.charencoding` are forwarded to them as appropriate
by the `policy` module.  But none of that matters, as long as the module
returned provides the listed methods.

The interface was copy/pasted from the `pure` module, but `jsonescapeu8fallback`
is omitted because it is accessed from the `pure` module directly when the
escaping fails in the primary module's `jsonescapeu8()`.

from typing import (
    AnyStr,
    IO,
    List,
    Optional,
    Sequence,
)

version: int

class stat:
    st_dev: int
    st_mode: int
    st_nlink: int
    st_size: int
    st_mtime: int
    st_ctime: int

def listdir(path: bytes, st: bool, skip: Optional[bool]) -> List[stat]: ...
def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...
def statfiles(names: Sequence[bytes]) -> List[stat]: ...
def setprocname(name: bytes) -> None: ...
def getfstype(path: bytes) -> bytes: ...
def getfsmountpoint(path: bytes) -> bytes: ...
def unblocksignal(sig: int) -> None: ...
def isgui() -> bool: ...