Mercurial > hg
view mercurial/windows.py @ 50793:1fbae268ecae
wrapfunction: use sysstr instead of bytes as argument in "sqlitestore"
This is as valid and simpler, it will help us to eventually get ride of
`safehasattr`.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Fri, 03 Feb 2023 04:27:17 +0100 |
parents | 3fd5824f1177 |
children | 18c8c18993f0 |
line wrap: on
line source
# windows.py - Windows utility function implementations for Mercurial # # Copyright 2005-2009 Olivia Mackall <olivia@selenic.com> 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. import errno import getpass import msvcrt # pytype: disable=import-error import os import re import stat import string import sys import typing import winreg # pytype: disable=import-error from typing import ( AnyStr, BinaryIO, Iterable, Iterator, List, Mapping, NoReturn, Optional, Pattern, Sequence, Tuple, Union, ) from .i18n import _ from .pycompat import getattr from . import ( encoding, error, policy, pycompat, typelib, win32, ) osutil = policy.importmod('osutil') getfsmountpoint = win32.getvolumename getfstype = win32.getfstype getuser = win32.getuser hidewindow = win32.hidewindow makedir = win32.makedir nlinks = win32.nlinks oslink = win32.oslink samedevice = win32.samedevice samefile = win32.samefile setsignalhandler = win32.setsignalhandler spawndetached = win32.spawndetached split = os.path.split testpid = win32.testpid unlink = win32.unlink if typing.TYPE_CHECKING: # Replace the various overloads that come along with aliasing stdlib methods # with the narrow definition that we care about in the type checking phase # only. This ensures that both Windows and POSIX see only the definition # that is actually available. # # Note that if we check pycompat.TYPE_CHECKING here, it is always False, and # the methods aren't replaced. def split(p: bytes) -> Tuple[bytes, bytes]: raise NotImplementedError umask: int = 0o022 class mixedfilemodewrapper: """Wraps a file handle when it is opened in read/write mode. fopen() and fdopen() on Windows have a specific-to-Windows requirement that files opened with mode r+, w+, or a+ make a call to a file positioning function when switching between reads and writes. Without this extra call, Python will raise a not very intuitive "IOError: [Errno 0] Error." This class wraps posixfile instances when the file is opened in read/write mode and automatically adds checks or inserts appropriate file positioning calls when necessary. """ OPNONE = 0 OPREAD = 1 OPWRITE = 2 def __init__(self, fp): object.__setattr__(self, '_fp', fp) object.__setattr__(self, '_lastop', 0) def __enter__(self): self._fp.__enter__() return self def __exit__(self, exc_type, exc_val, exc_tb): self._fp.__exit__(exc_type, exc_val, exc_tb) def __getattr__(self, name): return getattr(self._fp, name) def __setattr__(self, name, value): return self._fp.__setattr__(name, value) def _noopseek(self): self._fp.seek(0, os.SEEK_CUR) def seek(self, *args, **kwargs): object.__setattr__(self, '_lastop', self.OPNONE) return self._fp.seek(*args, **kwargs) def write(self, d): if self._lastop == self.OPREAD: self._noopseek() object.__setattr__(self, '_lastop', self.OPWRITE) return self._fp.write(d) def writelines(self, *args, **kwargs): if self._lastop == self.OPREAD: self._noopeseek() object.__setattr__(self, '_lastop', self.OPWRITE) return self._fp.writelines(*args, **kwargs) def read(self, *args, **kwargs): if self._lastop == self.OPWRITE: self._noopseek() object.__setattr__(self, '_lastop', self.OPREAD) return self._fp.read(*args, **kwargs) def readline(self, *args, **kwargs): if self._lastop == self.OPWRITE: self._noopseek() object.__setattr__(self, '_lastop', self.OPREAD) return self._fp.readline(*args, **kwargs) def readlines(self, *args, **kwargs): if self._lastop == self.OPWRITE: self._noopseek() object.__setattr__(self, '_lastop', self.OPREAD) return self._fp.readlines(*args, **kwargs) class fdproxy: """Wraps osutil.posixfile() to override the name attribute to reflect the underlying file name. """ def __init__(self, name, fp): self.name = name self._fp = fp def __enter__(self): self._fp.__enter__() # Return this wrapper for the context manager so that the name is # still available. return self def __exit__(self, exc_type, exc_value, traceback): self._fp.__exit__(exc_type, exc_value, traceback) def __iter__(self): return iter(self._fp) def __getattr__(self, name): return getattr(self._fp, name) def posixfile(name, mode=b'r', buffering=-1): '''Open a file with even more POSIX-like semantics''' try: fp = osutil.posixfile(name, mode, buffering) # may raise WindowsError # PyFile_FromFd() ignores the name, and seems to report fp.name as the # underlying file descriptor. fp = fdproxy(name, fp) # The position when opening in append mode is implementation defined, so # make it consistent with other platforms, which position at EOF. if b'a' in mode: fp.seek(0, os.SEEK_END) if b'+' in mode: return mixedfilemodewrapper(fp) return fp except WindowsError as err: # pytype: disable=name-error # convert to a friendlier exception raise IOError( err.errno, '%s: %s' % (encoding.strfromlocal(name), err.strerror) ) # may be wrapped by win32mbcs extension listdir = osutil.listdir def get_password() -> bytes: """Prompt for password with echo off, using Windows getch(). This shouldn't be called directly- use ``ui.getpass()`` instead, which checks if the session is interactive first. """ pw = u"" while True: c = msvcrt.getwch() # pytype: disable=module-attr if c == u'\r' or c == u'\n': break if c == u'\003': raise KeyboardInterrupt if c == u'\b': pw = pw[:-1] else: pw = pw + c msvcrt.putwch(u'\r') # pytype: disable=module-attr msvcrt.putwch(u'\n') # pytype: disable=module-attr return encoding.unitolocal(pw) class winstdout(typelib.BinaryIO_Proxy): """Some files on Windows misbehave. When writing to a broken pipe, EINVAL instead of EPIPE may be raised. When writing too many bytes to a console at the same, a "Not enough space" error may happen. Python 3 already works around that. """ def __init__(self, fp: BinaryIO): self.fp = fp def __getattr__(self, key): return getattr(self.fp, key) def close(self): try: self.fp.close() except IOError: pass def write(self, s): try: return self.fp.write(s) except IOError as inst: if inst.errno != 0 and not win32.lasterrorwaspipeerror(inst): raise self.close() raise IOError(errno.EPIPE, 'Broken pipe') def flush(self): try: return self.fp.flush() except IOError as inst: if not win32.lasterrorwaspipeerror(inst): raise raise IOError(errno.EPIPE, 'Broken pipe') def openhardlinks() -> bool: return True def parsepatchoutput(output_line: bytes) -> bytes: """parses the output produced by patch and returns the filename""" pf = output_line[14:] if pf[0] == b'`': pf = pf[1:-1] # Remove the quotes return pf def sshargs( sshcmd: bytes, host: bytes, user: Optional[bytes], port: Optional[bytes] ) -> bytes: '''Build argument list for ssh or Plink''' pflag = b'plink' in sshcmd.lower() and b'-P' or b'-p' args = user and (b"%s@%s" % (user, host)) or host if args.startswith(b'-') or args.startswith(b'/'): raise error.Abort( _(b'illegal ssh hostname or username starting with - or /: %s') % args ) args = shellquote(args) if port: args = b'%s %s %s' % (pflag, shellquote(port), args) return args def setflags(f: bytes, l: bool, x: bool) -> None: pass def copymode( src: bytes, dst: bytes, mode: Optional[bytes] = None, enforcewritable: bool = False, ) -> None: pass def checkexec(path: bytes) -> bool: return False def checklink(path: bytes) -> bool: return False def setbinary(fd) -> None: # When run without console, pipes may expose invalid # fileno(), usually set to -1. fno = getattr(fd, 'fileno', None) if fno is not None and fno() >= 0: msvcrt.setmode(fno(), os.O_BINARY) # pytype: disable=module-attr def pconvert(path: bytes) -> bytes: return path.replace(pycompat.ossep, b'/') def localpath(path: bytes) -> bytes: return path.replace(b'/', b'\\') def normpath(path: bytes) -> bytes: return pconvert(os.path.normpath(path)) def normcase(path: bytes) -> bytes: return encoding.upper(path) # NTFS compares via upper() DRIVE_RE_B: Pattern[bytes] = re.compile(b'^[a-z]:') DRIVE_RE_S: Pattern[str] = re.compile('^[a-z]:') # TODO: why is this accepting str? def abspath(path: AnyStr) -> AnyStr: abs_path = os.path.abspath(path) # re-exports # Python on Windows is inconsistent regarding the capitalization of drive # letter and this cause issue with various path comparison along the way. # So we normalize the drive later to upper case here. # # See https://bugs.python.org/issue40368 for and example of this hell. if isinstance(abs_path, bytes): if DRIVE_RE_B.match(abs_path): abs_path = abs_path[0:1].upper() + abs_path[1:] elif DRIVE_RE_S.match(abs_path): abs_path = abs_path[0:1].upper() + abs_path[1:] return abs_path # see posix.py for definitions normcasespec: int = encoding.normcasespecs.upper normcasefallback = encoding.upperfallback def samestat(s1: os.stat_result, s2: os.stat_result) -> bool: return False def shelltocmdexe(path: bytes, env: Mapping[bytes, bytes]) -> bytes: r"""Convert shell variables in the form $var and ${var} inside ``path`` to %var% form. Existing Windows style variables are left unchanged. The variables are limited to the given environment. Unknown variables are left unchanged. >>> e = {b'var1': b'v1', b'var2': b'v2', b'var3': b'v3'} >>> # Only valid values are expanded >>> shelltocmdexe(b'cmd $var1 ${var2} %var3% $missing ${missing} %missing%', ... e) 'cmd %var1% %var2% %var3% $missing ${missing} %missing%' >>> # Single quote prevents expansion, as does \$ escaping >>> shelltocmdexe(b"cmd '$var1 ${var2} %var3%' \$var1 \${var2} \\", e) 'cmd "$var1 ${var2} %var3%" $var1 ${var2} \\' >>> # $$ is not special. %% is not special either, but can be the end and >>> # start of consecutive variables >>> shelltocmdexe(b"cmd $$ %% %var1%%var2%", e) 'cmd $$ %% %var1%%var2%' >>> # No double substitution >>> shelltocmdexe(b"$var1 %var1%", {b'var1': b'%var2%', b'var2': b'boom'}) '%var1% %var1%' >>> # Tilde expansion >>> shelltocmdexe(b"~/dir ~\dir2 ~tmpfile \~/", {}) '%USERPROFILE%/dir %USERPROFILE%\\dir2 ~tmpfile ~/' """ if not any(c in path for c in b"$'~"): return path varchars = pycompat.sysbytes(string.ascii_letters + string.digits) + b'_-' res = b'' index = 0 pathlen = len(path) while index < pathlen: c = path[index : index + 1] if c == b'\'': # no expansion within single quotes path = path[index + 1 :] pathlen = len(path) try: index = path.index(b'\'') res += b'"' + path[:index] + b'"' except ValueError: res += c + path index = pathlen - 1 elif c == b'%': # variable path = path[index + 1 :] pathlen = len(path) try: index = path.index(b'%') except ValueError: res += b'%' + path index = pathlen - 1 else: var = path[:index] res += b'%' + var + b'%' elif c == b'$': # variable if path[index + 1 : index + 2] == b'{': path = path[index + 2 :] pathlen = len(path) try: index = path.index(b'}') var = path[:index] # See below for why empty variables are handled specially if env.get(var, b'') != b'': res += b'%' + var + b'%' else: res += b'${' + var + b'}' except ValueError: res += b'${' + path index = pathlen - 1 else: var = b'' index += 1 c = path[index : index + 1] while c != b'' and c in varchars: var += c index += 1 c = path[index : index + 1] # Some variables (like HG_OLDNODE) may be defined, but have an # empty value. Those need to be skipped because when spawning # cmd.exe to run the hook, it doesn't replace %VAR% for an empty # VAR, and that really confuses things like revset expressions. # OTOH, if it's left in Unix format and the hook runs sh.exe, it # will substitute to an empty string, and everything is happy. if env.get(var, b'') != b'': res += b'%' + var + b'%' else: res += b'$' + var if c != b'': index -= 1 elif ( c == b'~' and index + 1 < pathlen and path[index + 1 : index + 2] in (b'\\', b'/') ): res += b"%USERPROFILE%" elif ( c == b'\\' and index + 1 < pathlen and path[index + 1 : index + 2] in (b'$', b'~') ): # Skip '\', but only if it is escaping $ or ~ res += path[index + 1 : index + 2] index += 1 else: res += c index += 1 return res # A sequence of backslashes is special iff it precedes a double quote: # - if there's an even number of backslashes, the double quote is not # quoted (i.e. it ends the quoted region) # - if there's an odd number of backslashes, the double quote is quoted # - in both cases, every pair of backslashes is unquoted into a single # backslash # (See http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx ) # So, to quote a string, we must surround it in double quotes, double # the number of backslashes that precede double quotes and add another # backslash before every double quote (being careful with the double # quote we've appended to the end) _quotere: Optional[Pattern[bytes]] = None _needsshellquote = None def shellquote(s: bytes) -> bytes: r""" >>> shellquote(br'C:\Users\xyz') '"C:\\Users\\xyz"' >>> shellquote(br'C:\Users\xyz/mixed') '"C:\\Users\\xyz/mixed"' >>> # Would be safe not to quote too, since it is all double backslashes >>> shellquote(br'C:\\Users\\xyz') '"C:\\\\Users\\\\xyz"' >>> # But this must be quoted >>> shellquote(br'C:\\Users\\xyz/abc') '"C:\\\\Users\\\\xyz/abc"' """ global _quotere if _quotere is None: _quotere = re.compile(br'(\\*)("|\\$)') global _needsshellquote if _needsshellquote is None: # ":" is also treated as "safe character", because it is used as a part # of path name on Windows. "\" is also part of a path name, but isn't # safe because shlex.split() (kind of) treats it as an escape char and # drops it. It will leave the next character, even if it is another # "\". _needsshellquote = re.compile(br'[^a-zA-Z0-9._:/-]').search if s and not _needsshellquote(s) and not _quotere.search(s): # "s" shouldn't have to be quoted return s return b'"%s"' % _quotere.sub(br'\1\1\\\2', s) def _unquote(s: bytes) -> bytes: if s.startswith(b'"') and s.endswith(b'"'): return s[1:-1] return s def shellsplit(s: bytes) -> List[bytes]: """Parse a command string in cmd.exe way (best-effort)""" return pycompat.maplist(_unquote, pycompat.shlexsplit(s, posix=False)) # if you change this stub into a real check, please try to implement the # username and groupname functions above, too. def isowner(st: os.stat_result) -> bool: return True def findexe(command: bytes) -> Optional[bytes]: """Find executable for command searching like cmd.exe does. If command is a basename then PATH is searched for command. PATH isn't searched if command is an absolute or relative path. An extension from PATHEXT is found and added if not present. If command isn't found None is returned.""" pathext = encoding.environ.get(b'PATHEXT', b'.COM;.EXE;.BAT;.CMD') pathexts = [ext for ext in pathext.lower().split(pycompat.ospathsep)] if os.path.splitext(command)[1].lower() in pathexts: pathexts = [b''] def findexisting(pathcommand: bytes) -> Optional[bytes]: """Will append extension (if needed) and return existing file""" for ext in pathexts: executable = pathcommand + ext if os.path.exists(executable): return executable return None if pycompat.ossep in command: return findexisting(command) for path in encoding.environ.get(b'PATH', b'').split(pycompat.ospathsep): executable = findexisting(os.path.join(path, command)) if executable is not None: return executable return findexisting(os.path.expanduser(os.path.expandvars(command))) _wantedkinds = {stat.S_IFREG, stat.S_IFLNK} def statfiles(files: Sequence[bytes]) -> Iterator[Optional[os.stat_result]]: """Stat each file in files. Yield each stat, or None if a file does not exist or has a type we don't care about. Cluster and cache stat per directory to minimize number of OS stat calls.""" dircache = {} # dirname -> filename -> status | None if file does not exist getkind = stat.S_IFMT for nf in files: nf = normcase(nf) dir, base = os.path.split(nf) if not dir: dir = b'.' cache = dircache.get(dir, None) if cache is None: try: dmap = { normcase(n): s for n, k, s in listdir(dir, True) if getkind(s.st_mode) in _wantedkinds } except (FileNotFoundError, NotADirectoryError): dmap = {} cache = dircache.setdefault(dir, dmap) yield cache.get(base, None) def username(uid: Optional[int] = None) -> Optional[bytes]: """Return the name of the user with the given uid. If uid is None, return the name of the current user.""" if not uid: try: return pycompat.fsencode(getpass.getuser()) except ModuleNotFoundError: # getpass.getuser() checks for a few environment variables first, # but if those aren't set, imports pwd and calls getpwuid(), none of # which exists on Windows. pass return None def groupname(gid: Optional[int] = None) -> Optional[bytes]: """Return the name of the group with the given gid. If gid is None, return the name of the current group.""" return None def readlink(pathname: bytes) -> bytes: path = pycompat.fsdecode(pathname) try: link = os.readlink(path) except ValueError as e: # On py2, os.readlink() raises an AttributeError since it is # unsupported. On py3, reading a non-link raises a ValueError. Simply # treat this as the error the locking code has been expecting up to now # until an effort can be made to enable symlink support on Windows. raise AttributeError(e) return pycompat.fsencode(link) def removedirs(name: bytes) -> None: """special version of os.removedirs that does not remove symlinked directories or junction points if they actually contain files""" if listdir(name): return os.rmdir(name) head, tail = os.path.split(name) if not tail: head, tail = os.path.split(head) while head and tail: try: if listdir(head): return os.rmdir(head) except (ValueError, OSError): break head, tail = os.path.split(head) def rename(src: bytes, dst: bytes) -> None: '''atomically rename file src to dst, replacing dst if it exists''' try: os.rename(src, dst) except FileExistsError: unlink(dst) os.rename(src, dst) def gethgcmd() -> List[bytes]: return [encoding.strtolocal(arg) for arg in [sys.executable] + sys.argv[:1]] def groupmembers(name: bytes) -> List[bytes]: # Don't support groups on Windows for now raise KeyError def isexec(f: bytes) -> bool: return False class cachestat: def __init__(self, path: bytes) -> None: pass def cacheable(self) -> bool: return False def lookupreg( key: bytes, valname: Optional[bytes] = None, scope: Optional[Union[int, Iterable[int]]] = None, ) -> Optional[bytes]: """Look up a key/value name in the Windows registry. valname: value name. If unspecified, the default value for the key is used. scope: optionally specify scope for registry lookup, this can be a sequence of scopes to look up in order. Default (CURRENT_USER, LOCAL_MACHINE). """ if scope is None: # pytype: disable=module-attr scope = (winreg.HKEY_CURRENT_USER, winreg.HKEY_LOCAL_MACHINE) # pytype: enable=module-attr elif not isinstance(scope, (list, tuple)): scope = (scope,) for s in scope: try: # pytype: disable=module-attr with winreg.OpenKey(s, encoding.strfromlocal(key)) as hkey: # pytype: enable=module-attr name = None if valname is not None: name = encoding.strfromlocal(valname) # pytype: disable=module-attr val = winreg.QueryValueEx(hkey, name)[0] # pytype: enable=module-attr # never let a Unicode string escape into the wild return encoding.unitolocal(val) except EnvironmentError: pass expandglobs: bool = True def statislink(st: Optional[os.stat_result]) -> bool: '''check whether a stat result is a symlink''' return False def statisexec(st: Optional[os.stat_result]) -> bool: '''check whether a stat result is an executable file''' return False def poll(fds) -> List: # see posix.py for description raise NotImplementedError() def readpipe(pipe) -> bytes: """Read all available data from a pipe.""" chunks = [] while True: size = win32.peekpipe(pipe) if not size: break s = pipe.read(size) if not s: break chunks.append(s) return b''.join(chunks) def bindunixsocket(sock, path: bytes) -> NoReturn: raise NotImplementedError('unsupported platform')