typing: disable a few errors when accessing Windows specific attributes

This is already guarded with conditionals.  The entire win32 module is
conditionally loaded.

    File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 162, in <module>: No attribute 'winstdout' on module 'mercurial.posix' [module-attr]
    File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 163, in <module>: No attribute 'winstdout' on module 'mercurial.posix' [module-attr]
    File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 174, in <module>: No attribute 'winstdout' on module 'mercurial.posix' [module-attr]
    File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 175, in <module>: No attribute 'winstdout' on module 'mercurial.posix' [module-attr]

Differential Revision: https://phab.mercurial-scm.org/D10206

mercurial/utils/procutil.py

@@ -1,813 +1,813 b''
 # procutil.py - utility for managing processes and executable environment
 #
 #  Copyright 2005 K. Thananchayan <[e-mail]>
 #  Copyright 2005-2007 Matt Mackall <[e-mail]>
 #  Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import contextlib
 import errno
 import io
 import os
 import signal
 import subprocess
 import sys
 import threading
 import time
 
 from ..i18n import _
 from ..pycompat import (
     getattr,
     open,
 )
 
 from .. import (
     encoding,
     error,
     policy,
     pycompat,
 )
 
 # Import like this to keep import-checker happy
 from ..utils import resourceutil
 
 osutil = policy.importmod('osutil')
 
 if pycompat.iswindows:
     from .. import windows as platform
 else:
     from .. import posix as platform
 
 
 def isatty(fp):
     try:
         return fp.isatty()
     except AttributeError:
         return False
 
 
 class BadFile(io.RawIOBase):
     """Dummy file object to simulate closed stdio behavior"""
 
     def readinto(self, b):
         raise IOError(errno.EBADF, 'Bad file descriptor')
 
     def write(self, b):
         raise IOError(errno.EBADF, 'Bad file descriptor')
 
 
 class LineBufferedWrapper(object):
     def __init__(self, orig):
         self.orig = orig
 
     def __getattr__(self, attr):
         return getattr(self.orig, attr)
 
     def write(self, s):
         orig = self.orig
         res = orig.write(s)
         if s.endswith(b'\n'):
             orig.flush()
         return res
 
 
 io.BufferedIOBase.register(LineBufferedWrapper)
 
 
 def make_line_buffered(stream):
     if pycompat.ispy3 and not isinstance(stream, io.BufferedIOBase):
         # On Python 3, buffered streams can be expected to subclass
         # BufferedIOBase. This is definitively the case for the streams
         # initialized by the interpreter. For unbuffered streams, we don't need
         # to emulate line buffering.
         return stream
     if isinstance(stream, LineBufferedWrapper):
         return stream
     return LineBufferedWrapper(stream)
 
 
 def unwrap_line_buffered(stream):
     if isinstance(stream, LineBufferedWrapper):
         assert not isinstance(stream.orig, LineBufferedWrapper)
         return stream.orig
     return stream
 
 
 class WriteAllWrapper(object):
     def __init__(self, orig):
         self.orig = orig
 
     def __getattr__(self, attr):
         return getattr(self.orig, attr)
 
     def write(self, s):
         write1 = self.orig.write
         m = memoryview(s)
         total_to_write = len(s)
         total_written = 0
         while total_written < total_to_write:
             total_written += write1(m[total_written:])
         return total_written
 
 
 io.IOBase.register(WriteAllWrapper)
 
 
 def _make_write_all(stream):
     assert pycompat.ispy3
     if isinstance(stream, WriteAllWrapper):
         return stream
     if isinstance(stream, io.BufferedIOBase):
         # The io.BufferedIOBase.write() contract guarantees that all data is
         # written.
         return stream
     # In general, the write() method of streams is free to write only part of
     # the data.
     return WriteAllWrapper(stream)
 
 
 if pycompat.ispy3:
     # Python 3 implements its own I/O streams. Unlike stdio of C library,
     # sys.stdin/stdout/stderr may be None if underlying fd is closed.
 
     # TODO: .buffer might not exist if std streams were replaced; we'll need
     # a silly wrapper to make a bytes stream backed by a unicode one.
 
     if sys.stdin is None:
         stdin = BadFile()
     else:
         stdin = sys.stdin.buffer
     if sys.stdout is None:
         stdout = BadFile()
     else:
         stdout = _make_write_all(sys.stdout.buffer)
     if sys.stderr is None:
         stderr = BadFile()
     else:
         stderr = _make_write_all(sys.stderr.buffer)
 
     if pycompat.iswindows:
         # Work around Windows bugs.
-        stdout = platform.winstdout(stdout)
-        stderr = platform.winstdout(stderr)
+        stdout = platform.winstdout(stdout)  # pytype: disable=module-attr
+        stderr = platform.winstdout(stderr)  # pytype: disable=module-attr
     if isatty(stdout):
         # The standard library doesn't offer line-buffered binary streams.
         stdout = make_line_buffered(stdout)
 else:
     # Python 2 uses the I/O streams provided by the C library.
     stdin = sys.stdin
     stdout = sys.stdout
     stderr = sys.stderr
     if pycompat.iswindows:
         # Work around Windows bugs.
-        stdout = platform.winstdout(stdout)
-        stderr = platform.winstdout(stderr)
+        stdout = platform.winstdout(stdout)  # pytype: disable=module-attr
+        stderr = platform.winstdout(stderr)  # pytype: disable=module-attr
     if isatty(stdout):
         if pycompat.iswindows:
             # The Windows C runtime library doesn't support line buffering.
             stdout = make_line_buffered(stdout)
         else:
             # glibc determines buffering on first write to stdout - if we
             # replace a TTY destined stdout with a pipe destined stdout (e.g.
             # pager), we want line buffering.
             stdout = os.fdopen(stdout.fileno(), 'wb', 1)
 
 
 findexe = platform.findexe
 _gethgcmd = platform.gethgcmd
 getuser = platform.getuser
 getpid = os.getpid
 hidewindow = platform.hidewindow
 readpipe = platform.readpipe
 setbinary = platform.setbinary
 setsignalhandler = platform.setsignalhandler
 shellquote = platform.shellquote
 shellsplit = platform.shellsplit
 spawndetached = platform.spawndetached
 sshargs = platform.sshargs
 testpid = platform.testpid
 
 try:
     setprocname = osutil.setprocname
 except AttributeError:
     pass
 try:
     unblocksignal = osutil.unblocksignal
 except AttributeError:
     pass
 
 closefds = pycompat.isposix
 
 
 def explainexit(code):
     """return a message describing a subprocess status
     (codes from kill are negative - not os.system/wait encoding)"""
     if code >= 0:
         return _(b"exited with status %d") % code
     return _(b"killed by signal %d") % -code
 
 
 class _pfile(object):
     """File-like wrapper for a stream opened by subprocess.Popen()"""
 
     def __init__(self, proc, fp):
         self._proc = proc
         self._fp = fp
 
     def close(self):
         # unlike os.popen(), this returns an integer in subprocess coding
         self._fp.close()
         return self._proc.wait()
 
     def __iter__(self):
         return iter(self._fp)
 
     def __getattr__(self, attr):
         return getattr(self._fp, attr)
 
     def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         self.close()
 
 
 def popen(cmd, mode=b'rb', bufsize=-1):
     if mode == b'rb':
         return _popenreader(cmd, bufsize)
     elif mode == b'wb':
         return _popenwriter(cmd, bufsize)
     raise error.ProgrammingError(b'unsupported mode: %r' % mode)
 
 
 def _popenreader(cmd, bufsize):
     p = subprocess.Popen(
         tonativestr(cmd),
         shell=True,
         bufsize=bufsize,
         close_fds=closefds,
         stdout=subprocess.PIPE,
     )
     return _pfile(p, p.stdout)
 
 
 def _popenwriter(cmd, bufsize):
     p = subprocess.Popen(
         tonativestr(cmd),
         shell=True,
         bufsize=bufsize,
         close_fds=closefds,
         stdin=subprocess.PIPE,
     )
     return _pfile(p, p.stdin)
 
 
 def popen2(cmd, env=None):
     # Setting bufsize to -1 lets the system decide the buffer size.
     # The default for bufsize is 0, meaning unbuffered. This leads to
     # poor performance on Mac OS X: http://bugs.python.org/issue4194
     p = subprocess.Popen(
         tonativestr(cmd),
         shell=True,
         bufsize=-1,
         close_fds=closefds,
         stdin=subprocess.PIPE,
         stdout=subprocess.PIPE,
         env=tonativeenv(env),
     )
     return p.stdin, p.stdout
 
 
 def popen3(cmd, env=None):
     stdin, stdout, stderr, p = popen4(cmd, env)
     return stdin, stdout, stderr
 
 
 def popen4(cmd, env=None, bufsize=-1):
     p = subprocess.Popen(
         tonativestr(cmd),
         shell=True,
         bufsize=bufsize,
         close_fds=closefds,
         stdin=subprocess.PIPE,
         stdout=subprocess.PIPE,
         stderr=subprocess.PIPE,
         env=tonativeenv(env),
     )
     return p.stdin, p.stdout, p.stderr, p
 
 
 def pipefilter(s, cmd):
     '''filter string S through command CMD, returning its output'''
     p = subprocess.Popen(
         tonativestr(cmd),
         shell=True,
         close_fds=closefds,
         stdin=subprocess.PIPE,
         stdout=subprocess.PIPE,
     )
     pout, perr = p.communicate(s)
     return pout
 
 
 def tempfilter(s, cmd):
     """filter string S through a pair of temporary files with CMD.
     CMD is used as a template to create the real command to be run,
     with the strings INFILE and OUTFILE replaced by the real names of
     the temporary files generated."""
     inname, outname = None, None
     try:
         infd, inname = pycompat.mkstemp(prefix=b'hg-filter-in-')
         fp = os.fdopen(infd, 'wb')
         fp.write(s)
         fp.close()
         outfd, outname = pycompat.mkstemp(prefix=b'hg-filter-out-')
         os.close(outfd)
         cmd = cmd.replace(b'INFILE', inname)
         cmd = cmd.replace(b'OUTFILE', outname)
         code = system(cmd)
         if pycompat.sysplatform == b'OpenVMS' and code & 1:
             code = 0
         if code:
             raise error.Abort(
                 _(b"command '%s' failed: %s") % (cmd, explainexit(code))
             )
         with open(outname, b'rb') as fp:
             return fp.read()
     finally:
         try:
             if inname:
                 os.unlink(inname)
         except OSError:
             pass
         try:
             if outname:
                 os.unlink(outname)
         except OSError:
             pass
 
 
 _filtertable = {
     b'tempfile:': tempfilter,
     b'pipe:': pipefilter,
 }
 
 
 def filter(s, cmd):
     """filter a string through a command that transforms its input to its
     output"""
     for name, fn in pycompat.iteritems(_filtertable):
         if cmd.startswith(name):
             return fn(s, cmd[len(name) :].lstrip())
     return pipefilter(s, cmd)
 
 
 _hgexecutable = None
 
 
 def hgexecutable():
     """return location of the 'hg' executable.
 
     Defaults to $HG or 'hg' in the search path.
     """
     if _hgexecutable is None:
         hg = encoding.environ.get(b'HG')
         mainmod = sys.modules['__main__']
         if hg:
             _sethgexecutable(hg)
         elif resourceutil.mainfrozen():
             if getattr(sys, 'frozen', None) == 'macosx_app':
                 # Env variable set by py2app
                 _sethgexecutable(encoding.environ[b'EXECUTABLEPATH'])
             else:
                 _sethgexecutable(pycompat.sysexecutable)
         elif (
             not pycompat.iswindows
             and os.path.basename(getattr(mainmod, '__file__', '')) == 'hg'
         ):
             _sethgexecutable(pycompat.fsencode(mainmod.__file__))
         else:
             _sethgexecutable(
                 findexe(b'hg') or os.path.basename(pycompat.sysargv[0])
             )
     return _hgexecutable
 
 
 def _sethgexecutable(path):
     """set location of the 'hg' executable"""
     global _hgexecutable
     _hgexecutable = path
 
 
 def _testfileno(f, stdf):
     fileno = getattr(f, 'fileno', None)
     try:
         return fileno and fileno() == stdf.fileno()
     except io.UnsupportedOperation:
         return False  # fileno() raised UnsupportedOperation
 
 
 def isstdin(f):
     return _testfileno(f, sys.__stdin__)
 
 
 def isstdout(f):
     return _testfileno(f, sys.__stdout__)
 
 
 def protectstdio(uin, uout):
     """Duplicate streams and redirect original if (uin, uout) are stdio
 
     If uin is stdin, it's redirected to /dev/null. If uout is stdout, it's
     redirected to stderr so the output is still readable.
 
     Returns (fin, fout) which point to the original (uin, uout) fds, but
     may be copy of (uin, uout). The returned streams can be considered
     "owned" in that print(), exec(), etc. never reach to them.
     """
     uout.flush()
     fin, fout = uin, uout
     if _testfileno(uin, stdin):
         newfd = os.dup(uin.fileno())
         nullfd = os.open(os.devnull, os.O_RDONLY)
         os.dup2(nullfd, uin.fileno())
         os.close(nullfd)
         fin = os.fdopen(newfd, 'rb')
     if _testfileno(uout, stdout):
         newfd = os.dup(uout.fileno())
         os.dup2(stderr.fileno(), uout.fileno())
         fout = os.fdopen(newfd, 'wb')
     return fin, fout
 
 
 def restorestdio(uin, uout, fin, fout):
     """Restore (uin, uout) streams from possibly duplicated (fin, fout)"""
     uout.flush()
     for f, uif in [(fin, uin), (fout, uout)]:
         if f is not uif:
             os.dup2(f.fileno(), uif.fileno())
             f.close()
 
 
 def shellenviron(environ=None):
     """return environ with optional override, useful for shelling out"""
 
     def py2shell(val):
         """convert python object into string that is useful to shell"""
         if val is None or val is False:
             return b'0'
         if val is True:
             return b'1'
         return pycompat.bytestr(val)
 
     env = dict(encoding.environ)
     if environ:
         env.update((k, py2shell(v)) for k, v in pycompat.iteritems(environ))
     env[b'HG'] = hgexecutable()
     return env
 
 
 if pycompat.iswindows:
 
     def shelltonative(cmd, env):
         return platform.shelltocmdexe(  # pytype: disable=module-attr
             cmd, shellenviron(env)
         )
 
     tonativestr = encoding.strfromlocal
 else:
 
     def shelltonative(cmd, env):
         return cmd
 
     tonativestr = pycompat.identity
 
 
 def tonativeenv(env):
     """convert the environment from bytes to strings suitable for Popen(), etc."""
     return pycompat.rapply(tonativestr, env)
 
 
 def system(cmd, environ=None, cwd=None, out=None):
     """enhanced shell command execution.
     run with environment maybe modified, maybe in different dir.
 
     if out is specified, it is assumed to be a file-like object that has a
     write() method. stdout and stderr will be redirected to out."""
     try:
         stdout.flush()
     except Exception:
         pass
     env = shellenviron(environ)
     if out is None or isstdout(out):
         rc = subprocess.call(
             tonativestr(cmd),
             shell=True,
             close_fds=closefds,
             env=tonativeenv(env),
             cwd=pycompat.rapply(tonativestr, cwd),
         )
     else:
         proc = subprocess.Popen(
             tonativestr(cmd),
             shell=True,
             close_fds=closefds,
             env=tonativeenv(env),
             cwd=pycompat.rapply(tonativestr, cwd),
             stdout=subprocess.PIPE,
             stderr=subprocess.STDOUT,
         )
         for line in iter(proc.stdout.readline, b''):
             out.write(line)
         proc.wait()
         rc = proc.returncode
     if pycompat.sysplatform == b'OpenVMS' and rc & 1:
         rc = 0
     return rc
 
 
 _is_gui = None
 
 
 def _gui():
     '''Are we running in a GUI?'''
     if pycompat.isdarwin:
         if b'SSH_CONNECTION' in encoding.environ:
             # handle SSH access to a box where the user is logged in
             return False
         elif getattr(osutil, 'isgui', None):
             # check if a CoreGraphics session is available
             return osutil.isgui()
         else:
             # pure build; use a safe default
             return True
     else:
         return (
             pycompat.iswindows
             or encoding.environ.get(b"DISPLAY")
             or encoding.environ.get(b"WAYLAND_DISPLAY")
         )
 
 
 def gui():
     global _is_gui
     if _is_gui is None:
         _is_gui = _gui()
     return _is_gui
 
 
 def hgcmd():
     """Return the command used to execute current hg
 
     This is different from hgexecutable() because on Windows we want
     to avoid things opening new shell windows like batch files, so we
     get either the python call or current executable.
     """
     if resourceutil.mainfrozen():
         if getattr(sys, 'frozen', None) == 'macosx_app':
             # Env variable set by py2app
             return [encoding.environ[b'EXECUTABLEPATH']]
         else:
             return [pycompat.sysexecutable]
     return _gethgcmd()
 
 
 def rundetached(args, condfn):
     """Execute the argument list in a detached process.
 
     condfn is a callable which is called repeatedly and should return
     True once the child process is known to have started successfully.
     At this point, the child process PID is returned. If the child
     process fails to start or finishes before condfn() evaluates to
     True, return -1.
     """
     # Windows case is easier because the child process is either
     # successfully starting and validating the condition or exiting
     # on failure. We just poll on its PID. On Unix, if the child
     # process fails to start, it will be left in a zombie state until
     # the parent wait on it, which we cannot do since we expect a long
     # running process on success. Instead we listen for SIGCHLD telling
     # us our child process terminated.
     terminated = set()
 
     def handler(signum, frame):
         terminated.add(os.wait())
 
     prevhandler = None
     SIGCHLD = getattr(signal, 'SIGCHLD', None)
     if SIGCHLD is not None:
         prevhandler = signal.signal(SIGCHLD, handler)
     try:
         pid = spawndetached(args)
         while not condfn():
             if (pid in terminated or not testpid(pid)) and not condfn():
                 return -1
             time.sleep(0.1)
         return pid
     finally:
         if prevhandler is not None:
             signal.signal(signal.SIGCHLD, prevhandler)
 
 
 @contextlib.contextmanager
 def uninterruptible(warn):
     """Inhibit SIGINT handling on a region of code.
 
     Note that if this is called in a non-main thread, it turns into a no-op.
 
     Args:
       warn: A callable which takes no arguments, and returns True if the
             previous signal handling should be restored.
     """
 
     oldsiginthandler = [signal.getsignal(signal.SIGINT)]
     shouldbail = []
 
     def disabledsiginthandler(*args):
         if warn():
             signal.signal(signal.SIGINT, oldsiginthandler[0])
             del oldsiginthandler[0]
         shouldbail.append(True)
 
     try:
         try:
             signal.signal(signal.SIGINT, disabledsiginthandler)
         except ValueError:
             # wrong thread, oh well, we tried
             del oldsiginthandler[0]
         yield
     finally:
         if oldsiginthandler:
             signal.signal(signal.SIGINT, oldsiginthandler[0])
         if shouldbail:
             raise KeyboardInterrupt
 
 
 if pycompat.iswindows:
     # no fork on Windows, but we can create a detached process
     # https://msdn.microsoft.com/en-us/library/windows/desktop/ms684863.aspx
     # No stdlib constant exists for this value
     DETACHED_PROCESS = 0x00000008
     # Following creation flags might create a console GUI window.
     # Using subprocess.CREATE_NEW_CONSOLE might helps.
     # See https://phab.mercurial-scm.org/D1701 for discussion
     _creationflags = (
         DETACHED_PROCESS
         | subprocess.CREATE_NEW_PROCESS_GROUP  # pytype: disable=module-attr
     )
 
     def runbgcommand(
         script,
         env,
         shell=False,
         stdout=None,
         stderr=None,
         ensurestart=True,
         record_wait=None,
         stdin_bytes=None,
     ):
         '''Spawn a command without waiting for it to finish.'''
         # we can't use close_fds *and* redirect stdin. I'm not sure that we
         # need to because the detached process has no console connection.
 
         try:
             stdin = None
             if stdin_bytes is not None:
                 stdin = pycompat.unnamedtempfile()
                 stdin.write(stdin_bytes)
                 stdin.flush()
                 stdin.seek(0)
 
             p = subprocess.Popen(
                 pycompat.rapply(tonativestr, script),
                 shell=shell,
                 env=tonativeenv(env),
                 close_fds=True,
                 creationflags=_creationflags,
                 stdin=stdin,
                 stdout=stdout,
                 stderr=stderr,
             )
             if record_wait is not None:
                 record_wait(p.wait)
         finally:
             if stdin is not None:
                 stdin.close()
 
 
 else:
 
     def runbgcommand(
         cmd,
         env,
         shell=False,
         stdout=None,
         stderr=None,
         ensurestart=True,
         record_wait=None,
         stdin_bytes=None,
     ):
         """Spawn a command without waiting for it to finish.
 
 
         When `record_wait` is not None, the spawned process will not be fully
         detached and the `record_wait` argument will be called with a the
         `Subprocess.wait` function for the spawned process.  This is mostly
         useful for developers that need to make sure the spawned process
         finished before a certain point. (eg: writing test)"""
         if pycompat.isdarwin:
             # avoid crash in CoreFoundation in case another thread
             # calls gui() while we're calling fork().
             gui()
 
         # double-fork to completely detach from the parent process
         # based on http://code.activestate.com/recipes/278731
         if record_wait is None:
             pid = os.fork()
             if pid:
                 if not ensurestart:
                     # Even though we're not waiting on the child process,
                     # we still must call waitpid() on it at some point so
                     # it's not a zombie/defunct. This is especially relevant for
                     # chg since the parent process won't die anytime soon.
                     # We use a thread to make the overhead tiny.
                     def _do_wait():
                         os.waitpid(pid, 0)
 
                     t = threading.Thread(target=_do_wait)
                     t.daemon = True
                     t.start()
                     return
                 # Parent process
                 (_pid, status) = os.waitpid(pid, 0)
                 if os.WIFEXITED(status):
                     returncode = os.WEXITSTATUS(status)
                 else:
                     returncode = -(os.WTERMSIG(status))
                 if returncode != 0:
                     # The child process's return code is 0 on success, an errno
                     # value on failure, or 255 if we don't have a valid errno
                     # value.
                     #
                     # (It would be slightly nicer to return the full exception info
                     # over a pipe as the subprocess module does.  For now it
                     # doesn't seem worth adding that complexity here, though.)
                     if returncode == 255:
                         returncode = errno.EINVAL
                     raise OSError(
                         returncode,
                         b'error running %r: %s'
                         % (cmd, os.strerror(returncode)),
                     )
                 return
 
         returncode = 255
         try:
             if record_wait is None:
                 # Start a new session
                 os.setsid()
             # connect stdin to devnull to make sure the subprocess can't
             # muck up that stream for mercurial.
             if stdin_bytes is None:
                 stdin = open(os.devnull, b'r')
             else:
                 stdin = pycompat.unnamedtempfile()
                 stdin.write(stdin_bytes)
                 stdin.flush()
                 stdin.seek(0)
 
             if stdout is None:
                 stdout = open(os.devnull, b'w')
             if stderr is None:
                 stderr = open(os.devnull, b'w')
 
             p = subprocess.Popen(
                 cmd,
                 shell=shell,
                 env=env,
                 close_fds=True,
                 stdin=stdin,
                 stdout=stdout,
                 stderr=stderr,
             )
             if record_wait is not None:
                 record_wait(p.wait)
             returncode = 0
         except EnvironmentError as ex:
             returncode = ex.errno & 0xFF
             if returncode == 0:
                 # This shouldn't happen, but just in case make sure the
                 # return code is never 0 here.
                 returncode = 255
         except Exception:
             returncode = 255
         finally:
             # mission accomplished, this child needs to exit and not
             # continue the hg process here.
             stdin.close()
             if record_wait is None:
                 os._exit(returncode)

mercurial/win32.py

@@ -1,756 +1,766 b''
 # win32.py - utility functions that use win32 API
 #
 # Copyright 2005-2009 Matt Mackall <[e-mail]> and others
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import ctypes
 import ctypes.wintypes as wintypes
 import errno
 import msvcrt
 import os
 import random
 import subprocess
 
 from . import (
     encoding,
     pycompat,
 )
 
+# pytype: disable=module-attr
 _kernel32 = ctypes.windll.kernel32
 _advapi32 = ctypes.windll.advapi32
 _user32 = ctypes.windll.user32
 _crypt32 = ctypes.windll.crypt32
+# pytype: enable=module-attr
 
 _BOOL = ctypes.c_long
 _WORD = ctypes.c_ushort
 _DWORD = ctypes.c_ulong
 _UINT = ctypes.c_uint
 _LONG = ctypes.c_long
 _LPCSTR = _LPSTR = ctypes.c_char_p
 _HANDLE = ctypes.c_void_p
 _HWND = _HANDLE
 _PCCERT_CONTEXT = ctypes.c_void_p
 _MAX_PATH = wintypes.MAX_PATH
 
 _INVALID_HANDLE_VALUE = _HANDLE(-1).value
 
 # GetLastError
 _ERROR_SUCCESS = 0
 _ERROR_NO_MORE_FILES = 18
 _ERROR_INVALID_PARAMETER = 87
 _ERROR_BROKEN_PIPE = 109
 _ERROR_INSUFFICIENT_BUFFER = 122
 _ERROR_NO_DATA = 232
 
 # WPARAM is defined as UINT_PTR (unsigned type)
 # LPARAM is defined as LONG_PTR (signed type)
 if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p):
     _WPARAM = ctypes.c_ulong
     _LPARAM = ctypes.c_long
 elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p):
     _WPARAM = ctypes.c_ulonglong
     _LPARAM = ctypes.c_longlong
 
 
 class _FILETIME(ctypes.Structure):
     _fields_ = [('dwLowDateTime', _DWORD), ('dwHighDateTime', _DWORD)]
 
 
 class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure):
     _fields_ = [
         ('dwFileAttributes', _DWORD),
         ('ftCreationTime', _FILETIME),
         ('ftLastAccessTime', _FILETIME),
         ('ftLastWriteTime', _FILETIME),
         ('dwVolumeSerialNumber', _DWORD),
         ('nFileSizeHigh', _DWORD),
         ('nFileSizeLow', _DWORD),
         ('nNumberOfLinks', _DWORD),
         ('nFileIndexHigh', _DWORD),
         ('nFileIndexLow', _DWORD),
     ]
 
 
 # CreateFile
 _FILE_SHARE_READ = 0x00000001
 _FILE_SHARE_WRITE = 0x00000002
 _FILE_SHARE_DELETE = 0x00000004
 
 _OPEN_EXISTING = 3
 
 _FILE_FLAG_BACKUP_SEMANTICS = 0x02000000
 
 # SetFileAttributes
 _FILE_ATTRIBUTE_NORMAL = 0x80
 _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000
 
 # Process Security and Access Rights
 _PROCESS_QUERY_INFORMATION = 0x0400
 
 # GetExitCodeProcess
 _STILL_ACTIVE = 259
 
 
 class _STARTUPINFO(ctypes.Structure):
     _fields_ = [
         ('cb', _DWORD),
         ('lpReserved', _LPSTR),
         ('lpDesktop', _LPSTR),
         ('lpTitle', _LPSTR),
         ('dwX', _DWORD),
         ('dwY', _DWORD),
         ('dwXSize', _DWORD),
         ('dwYSize', _DWORD),
         ('dwXCountChars', _DWORD),
         ('dwYCountChars', _DWORD),
         ('dwFillAttribute', _DWORD),
         ('dwFlags', _DWORD),
         ('wShowWindow', _WORD),
         ('cbReserved2', _WORD),
         ('lpReserved2', ctypes.c_char_p),
         ('hStdInput', _HANDLE),
         ('hStdOutput', _HANDLE),
         ('hStdError', _HANDLE),
     ]
 
 
 class _PROCESS_INFORMATION(ctypes.Structure):
     _fields_ = [
         ('hProcess', _HANDLE),
         ('hThread', _HANDLE),
         ('dwProcessId', _DWORD),
         ('dwThreadId', _DWORD),
     ]
 
 
 _CREATE_NO_WINDOW = 0x08000000
 _SW_HIDE = 0
 
 
 class _COORD(ctypes.Structure):
     _fields_ = [('X', ctypes.c_short), ('Y', ctypes.c_short)]
 
 
 class _SMALL_RECT(ctypes.Structure):
     _fields_ = [
         ('Left', ctypes.c_short),
         ('Top', ctypes.c_short),
         ('Right', ctypes.c_short),
         ('Bottom', ctypes.c_short),
     ]
 
 
 class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure):
     _fields_ = [
         ('dwSize', _COORD),
         ('dwCursorPosition', _COORD),
         ('wAttributes', _WORD),
         ('srWindow', _SMALL_RECT),
         ('dwMaximumWindowSize', _COORD),
     ]
 
 
 _STD_OUTPUT_HANDLE = _DWORD(-11).value
 _STD_ERROR_HANDLE = _DWORD(-12).value
 
 # CERT_TRUST_STATUS dwErrorStatus
 CERT_TRUST_IS_PARTIAL_CHAIN = 0x10000
 
 # CertCreateCertificateContext encodings
 X509_ASN_ENCODING = 0x00000001
 PKCS_7_ASN_ENCODING = 0x00010000
 
 # These structs are only complete enough to achieve what we need.
 class CERT_CHAIN_CONTEXT(ctypes.Structure):
     _fields_ = (
         ("cbSize", _DWORD),
         # CERT_TRUST_STATUS struct
         ("dwErrorStatus", _DWORD),
         ("dwInfoStatus", _DWORD),
         ("cChain", _DWORD),
         ("rgpChain", ctypes.c_void_p),
         ("cLowerQualityChainContext", _DWORD),
         ("rgpLowerQualityChainContext", ctypes.c_void_p),
         ("fHasRevocationFreshnessTime", _BOOL),
         ("dwRevocationFreshnessTime", _DWORD),
     )
 
 
 class CERT_USAGE_MATCH(ctypes.Structure):
     _fields_ = (
         ("dwType", _DWORD),
         # CERT_ENHKEY_USAGE struct
         ("cUsageIdentifier", _DWORD),
         ("rgpszUsageIdentifier", ctypes.c_void_p),  # LPSTR *
     )
 
 
 class CERT_CHAIN_PARA(ctypes.Structure):
     _fields_ = (
         ("cbSize", _DWORD),
         ("RequestedUsage", CERT_USAGE_MATCH),
         ("RequestedIssuancePolicy", CERT_USAGE_MATCH),
         ("dwUrlRetrievalTimeout", _DWORD),
         ("fCheckRevocationFreshnessTime", _BOOL),
         ("dwRevocationFreshnessTime", _DWORD),
         ("pftCacheResync", ctypes.c_void_p),  # LPFILETIME
         ("pStrongSignPara", ctypes.c_void_p),  # PCCERT_STRONG_SIGN_PARA
         ("dwStrongSignFlags", _DWORD),
     )
 
 
 # types of parameters of C functions used (required by pypy)
 
 _crypt32.CertCreateCertificateContext.argtypes = [
     _DWORD,  # cert encoding
     ctypes.c_char_p,  # cert
     _DWORD,
 ]  # cert size
 _crypt32.CertCreateCertificateContext.restype = _PCCERT_CONTEXT
 
 _crypt32.CertGetCertificateChain.argtypes = [
     ctypes.c_void_p,  # HCERTCHAINENGINE
     _PCCERT_CONTEXT,
     ctypes.c_void_p,  # LPFILETIME
     ctypes.c_void_p,  # HCERTSTORE
     ctypes.c_void_p,  # PCERT_CHAIN_PARA
     _DWORD,
     ctypes.c_void_p,  # LPVOID
     ctypes.c_void_p,  # PCCERT_CHAIN_CONTEXT *
 ]
 _crypt32.CertGetCertificateChain.restype = _BOOL
 
 _crypt32.CertFreeCertificateContext.argtypes = [_PCCERT_CONTEXT]
 _crypt32.CertFreeCertificateContext.restype = _BOOL
 
 _kernel32.CreateFileA.argtypes = [
     _LPCSTR,
     _DWORD,
     _DWORD,
     ctypes.c_void_p,
     _DWORD,
     _DWORD,
     _HANDLE,
 ]
 _kernel32.CreateFileA.restype = _HANDLE
 
 _kernel32.GetFileInformationByHandle.argtypes = [_HANDLE, ctypes.c_void_p]
 _kernel32.GetFileInformationByHandle.restype = _BOOL
 
 _kernel32.CloseHandle.argtypes = [_HANDLE]
 _kernel32.CloseHandle.restype = _BOOL
 
 try:
     _kernel32.CreateHardLinkA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p]
     _kernel32.CreateHardLinkA.restype = _BOOL
 except AttributeError:
     pass
 
 _kernel32.SetFileAttributesA.argtypes = [_LPCSTR, _DWORD]
 _kernel32.SetFileAttributesA.restype = _BOOL
 
 _DRIVE_UNKNOWN = 0
 _DRIVE_NO_ROOT_DIR = 1
 _DRIVE_REMOVABLE = 2
 _DRIVE_FIXED = 3
 _DRIVE_REMOTE = 4
 _DRIVE_CDROM = 5
 _DRIVE_RAMDISK = 6
 
 _kernel32.GetDriveTypeA.argtypes = [_LPCSTR]
 _kernel32.GetDriveTypeA.restype = _UINT
 
 _kernel32.GetVolumeInformationA.argtypes = [
     _LPCSTR,
     ctypes.c_void_p,
     _DWORD,
     ctypes.c_void_p,
     ctypes.c_void_p,
     ctypes.c_void_p,
     ctypes.c_void_p,
     _DWORD,
 ]
 _kernel32.GetVolumeInformationA.restype = _BOOL
 
 _kernel32.GetVolumePathNameA.argtypes = [_LPCSTR, ctypes.c_void_p, _DWORD]
 _kernel32.GetVolumePathNameA.restype = _BOOL
 
 _kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD]
 _kernel32.OpenProcess.restype = _HANDLE
 
 _kernel32.GetExitCodeProcess.argtypes = [_HANDLE, ctypes.c_void_p]
 _kernel32.GetExitCodeProcess.restype = _BOOL
 
 _kernel32.GetLastError.argtypes = []
 _kernel32.GetLastError.restype = _DWORD
 
 _kernel32.GetModuleFileNameA.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD]
 _kernel32.GetModuleFileNameA.restype = _DWORD
 
 _kernel32.CreateProcessA.argtypes = [
     _LPCSTR,
     _LPCSTR,
     ctypes.c_void_p,
     ctypes.c_void_p,
     _BOOL,
     _DWORD,
     ctypes.c_void_p,
     _LPCSTR,
     ctypes.c_void_p,
     ctypes.c_void_p,
 ]
 _kernel32.CreateProcessA.restype = _BOOL
 
 _kernel32.ExitProcess.argtypes = [_UINT]
 _kernel32.ExitProcess.restype = None
 
 _kernel32.GetCurrentProcessId.argtypes = []
 _kernel32.GetCurrentProcessId.restype = _DWORD
 
+# pytype: disable=module-attr
 _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD)
+# pytype: enable=module-attr
 _kernel32.SetConsoleCtrlHandler.argtypes = [_SIGNAL_HANDLER, _BOOL]
 _kernel32.SetConsoleCtrlHandler.restype = _BOOL
 
 _kernel32.SetConsoleMode.argtypes = [_HANDLE, _DWORD]
 _kernel32.SetConsoleMode.restype = _BOOL
 
 _kernel32.GetConsoleMode.argtypes = [_HANDLE, ctypes.c_void_p]
 _kernel32.GetConsoleMode.restype = _BOOL
 
 _kernel32.GetStdHandle.argtypes = [_DWORD]
 _kernel32.GetStdHandle.restype = _HANDLE
 
 _kernel32.GetConsoleScreenBufferInfo.argtypes = [_HANDLE, ctypes.c_void_p]
 _kernel32.GetConsoleScreenBufferInfo.restype = _BOOL
 
 _advapi32.GetUserNameA.argtypes = [ctypes.c_void_p, ctypes.c_void_p]
 _advapi32.GetUserNameA.restype = _BOOL
 
 _user32.GetWindowThreadProcessId.argtypes = [_HANDLE, ctypes.c_void_p]
 _user32.GetWindowThreadProcessId.restype = _DWORD
 
 _user32.ShowWindow.argtypes = [_HANDLE, ctypes.c_int]
 _user32.ShowWindow.restype = _BOOL
 
+# pytype: disable=module-attr
 _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM)
+# pytype: enable=module-attr
 _user32.EnumWindows.argtypes = [_WNDENUMPROC, _LPARAM]
 _user32.EnumWindows.restype = _BOOL
 
 _kernel32.PeekNamedPipe.argtypes = [
     _HANDLE,
     ctypes.c_void_p,
     _DWORD,
     ctypes.c_void_p,
     ctypes.c_void_p,
     ctypes.c_void_p,
 ]
 _kernel32.PeekNamedPipe.restype = _BOOL
 
 
 def _raiseoserror(name):
     # Force the code to a signed int to avoid an 'int too large' error.
     # See https://bugs.python.org/issue28474
     code = _kernel32.GetLastError()
     if code > 0x7FFFFFFF:
         code -= 2 ** 32
-    err = ctypes.WinError(code=code)
+    err = ctypes.WinError(code=code)  # pytype: disable=module-attr
     raise OSError(
         err.errno, '%s: %s' % (encoding.strfromlocal(name), err.strerror)
     )
 
 
 def _getfileinfo(name):
     fh = _kernel32.CreateFileA(
         name,
         0,
         _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE,
         None,
         _OPEN_EXISTING,
         _FILE_FLAG_BACKUP_SEMANTICS,
         None,
     )
     if fh == _INVALID_HANDLE_VALUE:
         _raiseoserror(name)
     try:
         fi = _BY_HANDLE_FILE_INFORMATION()
         if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)):
             _raiseoserror(name)
         return fi
     finally:
         _kernel32.CloseHandle(fh)
 
 
 def checkcertificatechain(cert, build=True):
     """Tests the given certificate to see if there is a complete chain to a
     trusted root certificate.  As a side effect, missing certificates are
     downloaded and installed unless ``build=False``.  True is returned if a
     chain to a trusted root exists (even if built on the fly), otherwise
     False.  NB: A chain to a trusted root does NOT imply that the certificate
     is valid.
     """
 
     chainctxptr = ctypes.POINTER(CERT_CHAIN_CONTEXT)
 
     pchainctx = chainctxptr()
     chainpara = CERT_CHAIN_PARA(
         cbSize=ctypes.sizeof(CERT_CHAIN_PARA), RequestedUsage=CERT_USAGE_MATCH()
     )
 
     certctx = _crypt32.CertCreateCertificateContext(
         X509_ASN_ENCODING, cert, len(cert)
     )
     if certctx is None:
         _raiseoserror(b'CertCreateCertificateContext')
 
     flags = 0
 
     if not build:
         flags |= 0x100  # CERT_CHAIN_DISABLE_AUTH_ROOT_AUTO_UPDATE
 
     try:
         # Building the certificate chain will update root certs as necessary.
         if not _crypt32.CertGetCertificateChain(
             None,  # hChainEngine
             certctx,  # pCertContext
             None,  # pTime
             None,  # hAdditionalStore
             ctypes.byref(chainpara),
             flags,
             None,  # pvReserved
             ctypes.byref(pchainctx),
         ):
             _raiseoserror(b'CertGetCertificateChain')
 
         chainctx = pchainctx.contents
 
         return chainctx.dwErrorStatus & CERT_TRUST_IS_PARTIAL_CHAIN == 0
     finally:
         if pchainctx:
             _crypt32.CertFreeCertificateChain(pchainctx)
         _crypt32.CertFreeCertificateContext(certctx)
 
 
 def oslink(src, dst):
     try:
         if not _kernel32.CreateHardLinkA(dst, src, None):
             _raiseoserror(src)
     except AttributeError:  # Wine doesn't support this function
         _raiseoserror(src)
 
 
 def nlinks(name):
     '''return number of hardlinks for the given file'''
     return _getfileinfo(name).nNumberOfLinks
 
 
 def samefile(path1, path2):
     '''Returns whether path1 and path2 refer to the same file or directory.'''
     res1 = _getfileinfo(path1)
     res2 = _getfileinfo(path2)
     return (
         res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber
         and res1.nFileIndexHigh == res2.nFileIndexHigh
         and res1.nFileIndexLow == res2.nFileIndexLow
     )
 
 
 def samedevice(path1, path2):
     '''Returns whether path1 and path2 are on the same device.'''
     res1 = _getfileinfo(path1)
     res2 = _getfileinfo(path2)
     return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber
 
 
 def peekpipe(pipe):
-    handle = msvcrt.get_osfhandle(pipe.fileno())
+    handle = msvcrt.get_osfhandle(pipe.fileno())  # pytype: disable=module-attr
     avail = _DWORD()
 
     if not _kernel32.PeekNamedPipe(
         handle, None, 0, None, ctypes.byref(avail), None
     ):
         err = _kernel32.GetLastError()
         if err == _ERROR_BROKEN_PIPE:
             return 0
-        raise ctypes.WinError(err)
+        raise ctypes.WinError(err)  # pytype: disable=module-attr
 
     return avail.value
 
 
 def lasterrorwaspipeerror(err):
     if err.errno != errno.EINVAL:
         return False
     err = _kernel32.GetLastError()
     return err == _ERROR_BROKEN_PIPE or err == _ERROR_NO_DATA
 
 
 def testpid(pid):
     """return True if pid is still running or unable to
     determine, False otherwise"""
     h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid)
     if h:
         try:
             status = _DWORD()
             if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)):
                 return status.value == _STILL_ACTIVE
         finally:
             _kernel32.CloseHandle(h)
     return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER
 
 
 def executablepath():
     '''return full path of hg.exe'''
     size = 600
     buf = ctypes.create_string_buffer(size + 1)
     len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size)
+    # pytype: disable=module-attr
     if len == 0:
         raise ctypes.WinError()  # Note: WinError is a function
     elif len == size:
         raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER)
+    # pytype: enable=module-attr
     return buf.value
 
 
 def getvolumename(path):
     """Get the mount point of the filesystem from a directory or file
     (best-effort)
 
     Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
     """
     # realpath() calls GetFullPathName()
     realpath = os.path.realpath(path)
 
     # allocate at least MAX_PATH long since GetVolumePathName('c:\\', buf, 4)
     # somehow fails on Windows XP
     size = max(len(realpath), _MAX_PATH) + 1
     buf = ctypes.create_string_buffer(size)
 
     if not _kernel32.GetVolumePathNameA(realpath, ctypes.byref(buf), size):
-        raise ctypes.WinError()  # Note: WinError is a function
+        # Note: WinError is a function
+        raise ctypes.WinError()  # pytype: disable=module-attr
 
     return buf.value
 
 
 def getfstype(path):
     """Get the filesystem type name from a directory or file (best-effort)
 
     Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
     """
     volume = getvolumename(path)
 
     t = _kernel32.GetDriveTypeA(volume)
 
     if t == _DRIVE_REMOTE:
         return b'cifs'
     elif t not in (
         _DRIVE_REMOVABLE,
         _DRIVE_FIXED,
         _DRIVE_CDROM,
         _DRIVE_RAMDISK,
     ):
         return None
 
     size = _MAX_PATH + 1
     name = ctypes.create_string_buffer(size)
 
     if not _kernel32.GetVolumeInformationA(
         volume, None, 0, None, None, None, ctypes.byref(name), size
     ):
-        raise ctypes.WinError()  # Note: WinError is a function
+        # Note: WinError is a function
+        raise ctypes.WinError()  # pytype: disable=module-attr
 
     return name.value
 
 
 def getuser():
     '''return name of current user'''
     size = _DWORD(300)
     buf = ctypes.create_string_buffer(size.value + 1)
     if not _advapi32.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)):
-        raise ctypes.WinError()
+        raise ctypes.WinError()  # pytype: disable=module-attr
     return buf.value
 
 
 _signalhandler = []
 
 
 def setsignalhandler():
     """Register a termination handler for console events including
     CTRL+C. python signal handlers do not work well with socket
     operations.
     """
 
     def handler(event):
         _kernel32.ExitProcess(1)
 
     if _signalhandler:
         return  # already registered
     h = _SIGNAL_HANDLER(handler)
     _signalhandler.append(h)  # needed to prevent garbage collection
     if not _kernel32.SetConsoleCtrlHandler(h, True):
-        raise ctypes.WinError()
+        raise ctypes.WinError()  # pytype: disable=module-attr
 
 
 def hidewindow():
     def callback(hwnd, pid):
         wpid = _DWORD()
         _user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid))
         if pid == wpid.value:
             _user32.ShowWindow(hwnd, _SW_HIDE)
             return False  # stop enumerating windows
         return True
 
     pid = _kernel32.GetCurrentProcessId()
     _user32.EnumWindows(_WNDENUMPROC(callback), pid)
 
 
 def termsize():
     # cmd.exe does not handle CR like a unix console, the CR is
     # counted in the line length. On 80 columns consoles, if 80
     # characters are written, the following CR won't apply on the
     # current line but on the new one. Keep room for it.
     width = 80 - 1
     height = 25
     # Query stderr to avoid problems with redirections
     screenbuf = _kernel32.GetStdHandle(
         _STD_ERROR_HANDLE
     )  # don't close the handle returned
     if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE:
         return width, height
     csbi = _CONSOLE_SCREEN_BUFFER_INFO()
     if not _kernel32.GetConsoleScreenBufferInfo(screenbuf, ctypes.byref(csbi)):
         return width, height
     width = csbi.srWindow.Right - csbi.srWindow.Left  # don't '+ 1'
     height = csbi.srWindow.Bottom - csbi.srWindow.Top + 1
     return width, height
 
 
 def enablevtmode():
     """Enable virtual terminal mode for the associated console.  Return True if
     enabled, else False."""
 
     ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x4
 
     handle = _kernel32.GetStdHandle(
         _STD_OUTPUT_HANDLE
     )  # don't close the handle
     if handle == _INVALID_HANDLE_VALUE:
         return False
 
     mode = _DWORD(0)
 
     if not _kernel32.GetConsoleMode(handle, ctypes.byref(mode)):
         return False
 
     if (mode.value & ENABLE_VIRTUAL_TERMINAL_PROCESSING) == 0:
         mode.value |= ENABLE_VIRTUAL_TERMINAL_PROCESSING
 
         if not _kernel32.SetConsoleMode(handle, mode):
             return False
 
     return True
 
 
 def spawndetached(args):
     # No standard library function really spawns a fully detached
     # process under win32 because they allocate pipes or other objects
     # to handle standard streams communications. Passing these objects
     # to the child process requires handle inheritance to be enabled
     # which makes really detached processes impossible.
     si = _STARTUPINFO()
     si.cb = ctypes.sizeof(_STARTUPINFO)
 
     pi = _PROCESS_INFORMATION()
 
     env = b''
     for k in encoding.environ:
         env += b"%s=%s\0" % (k, encoding.environ[k])
     if not env:
         env = b'\0'
     env += b'\0'
 
     args = subprocess.list2cmdline(pycompat.rapply(encoding.strfromlocal, args))
 
     # TODO: CreateProcessW on py3?
     res = _kernel32.CreateProcessA(
         None,
         encoding.strtolocal(args),
         None,
         None,
         False,
         _CREATE_NO_WINDOW,
         env,
         encoding.getcwd(),
         ctypes.byref(si),
         ctypes.byref(pi),
     )
     if not res:
-        raise ctypes.WinError()
+        raise ctypes.WinError()  # pytype: disable=module-attr
 
     _kernel32.CloseHandle(pi.hProcess)
     _kernel32.CloseHandle(pi.hThread)
 
     return pi.dwProcessId
 
 
 def unlink(f):
     '''try to implement POSIX' unlink semantics on Windows'''
 
     if os.path.isdir(f):
         # use EPERM because it is POSIX prescribed value, even though
         # unlink(2) on directories returns EISDIR on Linux
         raise IOError(
             errno.EPERM,
             r"Unlinking directory not permitted: '%s'"
             % encoding.strfromlocal(f),
         )
 
     # POSIX allows to unlink and rename open files. Windows has serious
     # problems with doing that:
     # - Calling os.unlink (or os.rename) on a file f fails if f or any
     #   hardlinked copy of f has been opened with Python's open(). There is no
     #   way such a file can be deleted or renamed on Windows (other than
     #   scheduling the delete or rename for the next reboot).
     # - Calling os.unlink on a file that has been opened with Mercurial's
     #   posixfile (or comparable methods) will delay the actual deletion of
     #   the file for as long as the file is held open. The filename is blocked
     #   during that time and cannot be used for recreating a new file under
     #   that same name ("zombie file"). Directories containing such zombie files
     #   cannot be removed or moved.
     # A file that has been opened with posixfile can be renamed, so we rename
     # f to a random temporary name before calling os.unlink on it. This allows
     # callers to recreate f immediately while having other readers do their
     # implicit zombie filename blocking on a temporary name.
 
     for tries in pycompat.xrange(10):
         temp = b'%s-%08x' % (f, random.randint(0, 0xFFFFFFFF))
         try:
             os.rename(f, temp)  # raises OSError EEXIST if temp exists
             break
         except OSError as e:
             if e.errno != errno.EEXIST:
                 raise
     else:
         raise IOError(errno.EEXIST, "No usable temporary filename found")
 
     try:
         os.unlink(temp)
     except OSError:
         # The unlink might have failed because the READONLY attribute may heave
         # been set on the original file. Rename works fine with READONLY set,
         # but not os.unlink. Reset all attributes and try again.
         _kernel32.SetFileAttributesA(temp, _FILE_ATTRIBUTE_NORMAL)
         try:
             os.unlink(temp)
         except OSError:
             # The unlink might have failed due to some very rude AV-Scanners.
             # Leaking a tempfile is the lesser evil than aborting here and
             # leaving some potentially serious inconsistencies.
             pass
 
 
 def makedir(path, notindexed):
     os.mkdir(path)
     if notindexed:
         _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)