mercurial/windows.py
author Adrian Buehlmann <adrian@cadifra.com>
Tue, 02 Aug 2011 13:18:56 +0200
changeset 15011 5e44e4b3a0a3
parent 14985 dbf91976f900
child 15016 871c77e78f5d
permissions -rw-r--r--
util: move copymode into posix.py and windows.py reducing it to a NOP on Windows. This eliminates a pointless stat call on Windows and reduces the risk of interferring with other processes (e.g. AV-scanners, file change watchers). See also http://mercurial.selenic.com/wiki/UnlinkingFilesOnWindows, item 2d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# windows.py - Windows utility function implementations for Mercurial
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#
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#  Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from i18n import _
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import osutil
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import errno, msvcrt, os, re, sys
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from win32 import executablepath
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from win32 import getuser
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from win32 import hidewindow
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from win32 import lookupreg
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from win32 import makedir
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from win32 import nlinks
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from win32 import oslink
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from win32 import samedevice
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from win32 import samefile
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from win32 import setsignalhandler
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from win32 import spawndetached
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from win32 import termwidth
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from win32 import testpid
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from win32 import unlink
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nulldev = 'NUL:'
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umask = 002
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# wrap osutil.posixfile to provide friendlier exceptions
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def posixfile(name, mode='r', buffering=-1):
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    try:
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        return osutil.posixfile(name, mode, buffering)
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    except WindowsError, err:
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        raise IOError(err.errno, '%s: %s' % (name, err.strerror))
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posixfile.__doc__ = osutil.posixfile.__doc__
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class winstdout(object):
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    '''stdout on windows misbehaves if sent through a pipe'''
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    def __init__(self, fp):
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        self.fp = fp
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    def __getattr__(self, key):
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        return getattr(self.fp, key)
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    def close(self):
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        try:
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            self.fp.close()
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        except IOError:
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            pass
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    def write(self, s):
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        try:
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            # This is workaround for "Not enough space" error on
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            # writing large size of data to console.
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            limit = 16000
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            l = len(s)
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            start = 0
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            self.softspace = 0
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            while start < l:
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                end = start + limit
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                self.fp.write(s[start:end])
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                start = end
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        except IOError, inst:
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            if inst.errno != 0:
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                raise
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            self.close()
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            raise IOError(errno.EPIPE, 'Broken pipe')
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    def flush(self):
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        try:
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            return self.fp.flush()
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        except IOError, inst:
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            if inst.errno != errno.EINVAL:
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                raise
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            self.close()
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            raise IOError(errno.EPIPE, 'Broken pipe')
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sys.__stdout__ = sys.stdout = winstdout(sys.stdout)
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def _is_win_9x():
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    '''return true if run on windows 95, 98 or me.'''
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    try:
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        return sys.getwindowsversion()[3] == 1
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    except AttributeError:
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        return 'command' in os.environ.get('comspec', '')
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def openhardlinks():
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    return not _is_win_9x()
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def parsepatchoutput(output_line):
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    """parses the output produced by patch and returns the filename"""
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    pf = output_line[14:]
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    if pf[0] == '`':
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        pf = pf[1:-1] # Remove the quotes
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    return pf
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def sshargs(sshcmd, host, user, port):
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    '''Build argument list for ssh or Plink'''
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    pflag = 'plink' in sshcmd.lower() and '-P' or '-p'
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    args = user and ("%s@%s" % (user, host)) or host
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    return port and ("%s %s %s" % (args, pflag, port)) or args
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def setflags(f, l, x):
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    pass
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def copymode(src, dst, mode=None):
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    pass
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def checkexec(path):
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    return False
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def checklink(path):
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    return False
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def setbinary(fd):
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    # When run without console, pipes may expose invalid
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    # fileno(), usually set to -1.
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    fno = getattr(fd, 'fileno', None)
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    if fno is not None and fno() >= 0:
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        msvcrt.setmode(fno(), os.O_BINARY)
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def pconvert(path):
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    return '/'.join(path.split(os.sep))
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def localpath(path):
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    return path.replace('/', '\\')
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def normpath(path):
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    return pconvert(os.path.normpath(path))
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def realpath(path):
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    '''
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    Returns the true, canonical file system path equivalent to the given
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    path.
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    '''
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    # TODO: There may be a more clever way to do this that also handles other,
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    # less common file systems.
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    return os.path.normpath(os.path.normcase(os.path.realpath(path)))
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def samestat(s1, s2):
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    return False
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# A sequence of backslashes is special iff it precedes a double quote:
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# - if there's an even number of backslashes, the double quote is not
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#   quoted (i.e. it ends the quoted region)
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# - if there's an odd number of backslashes, the double quote is quoted
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# - in both cases, every pair of backslashes is unquoted into a single
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#   backslash
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# (See http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx )
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# So, to quote a string, we must surround it in double quotes, double
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# the number of backslashes that preceed double quotes and add another
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# backslash before every double quote (being careful with the double
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# quote we've appended to the end)
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_quotere = None
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def shellquote(s):
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    global _quotere
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    if _quotere is None:
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        _quotere = re.compile(r'(\\*)("|\\$)')
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    return '"%s"' % _quotere.sub(r'\1\1\\\2', s)
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def quotecommand(cmd):
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    """Build a command string suitable for os.popen* calls."""
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    if sys.version_info < (2, 7, 1):
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        # Python versions since 2.7.1 do this extra quoting themselves
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        return '"' + cmd + '"'
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    return cmd
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def popen(command, mode='r'):
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    # Work around "popen spawned process may not write to stdout
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    # under windows"
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    # http://bugs.python.org/issue1366
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    command += " 2> %s" % nulldev
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    return os.popen(quotecommand(command), mode)
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def explainexit(code):
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    return _("exited with status %d") % code, code
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# if you change this stub into a real check, please try to implement the
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# username and groupname functions above, too.
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def isowner(st):
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    return True
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def findexe(command):
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    '''Find executable for command searching like cmd.exe does.
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    If command is a basename then PATH is searched for command.
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    PATH isn't searched if command is an absolute or relative path.
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    An extension from PATHEXT is found and added if not present.
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    If command isn't found None is returned.'''
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    pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD')
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    pathexts = [ext for ext in pathext.lower().split(os.pathsep)]
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    if os.path.splitext(command)[1].lower() in pathexts:
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        pathexts = ['']
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    def findexisting(pathcommand):
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        'Will append extension (if needed) and return existing file'
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        for ext in pathexts:
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            executable = pathcommand + ext
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            if os.path.exists(executable):
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                return executable
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        return None
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    if os.sep in command:
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        return findexisting(command)
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    for path in os.environ.get('PATH', '').split(os.pathsep):
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        executable = findexisting(os.path.join(path, command))
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        if executable is not None:
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            return executable
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    return findexisting(os.path.expanduser(os.path.expandvars(command)))
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def statfiles(files):
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    '''Stat each file in files and yield stat or None if file does not exist.
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    Cluster and cache stat per directory to minimize number of OS stat calls.'''
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    ncase = os.path.normcase
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    dircache = {} # dirname -> filename -> status | None if file does not exist
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    for nf in files:
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        nf  = ncase(nf)
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        dir, base = os.path.split(nf)
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        if not dir:
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            dir = '.'
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        cache = dircache.get(dir, None)
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        if cache is None:
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            try:
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                dmap = dict([(ncase(n), s)
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                    for n, k, s in osutil.listdir(dir, True)])
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            except OSError, err:
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                # handle directory not found in Python version prior to 2.5
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                # Python <= 2.4 returns native Windows code 3 in errno
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                # Python >= 2.5 returns ENOENT and adds winerror field
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                # EINVAL is raised if dir is not a directory.
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                if err.errno not in (3, errno.ENOENT, errno.EINVAL,
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                                     errno.ENOTDIR):
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                    raise
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                dmap = {}
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            cache = dircache.setdefault(dir, dmap)
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        yield cache.get(base, None)
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def username(uid=None):
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    """Return the name of the user with the given uid.
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    If uid is None, return the name of the current user."""
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    return None
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def groupname(gid=None):
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    """Return the name of the group with the given gid.
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    If gid is None, return the name of the current group."""
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    return None
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8364
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def _removedirs(name):
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    """special version of os.removedirs that does not remove symlinked
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    directories or junction points if they actually contain files"""
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    if osutil.listdir(name):
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        return
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    os.rmdir(name)
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    head, tail = os.path.split(name)
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    if not tail:
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        head, tail = os.path.split(head)
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    while head and tail:
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        try:
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            if osutil.listdir(head):
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                return
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            os.rmdir(head)
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        except (ValueError, OSError):
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            break
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        head, tail = os.path.split(head)
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6bf39d88c857 rename util.unlink to unlinkpath
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def unlinkpath(f):
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    """unlink and remove the directory if it is empty"""
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    unlink(f)
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    # try removing directories that might now be empty
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    try:
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        _removedirs(os.path.dirname(f))
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    except OSError:
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        pass
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def rename(src, dst):
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    '''atomically rename file src to dst, replacing dst if it exists'''
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    try:
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        os.rename(src, dst)
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    except OSError, e:
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        if e.errno != errno.EEXIST:
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            raise
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        unlink(dst)
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        os.rename(src, dst)
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   288
10239
8e4be44a676f Find right hg command for detached process
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def gethgcmd():
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    return [sys.executable] + sys.argv[:1]
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   291
12689
c52c629ce19e termwidth: move to ui.ui from util
Augie Fackler <durin42@gmail.com>
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def termwidth():
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    # cmd.exe does not handle CR like a unix console, the CR is
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    # counted in the line length. On 80 columns consoles, if 80
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   295
    # characters are written, the following CR won't apply on the
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diff changeset
   296
    # current line but on the new one. Keep room for it.
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   297
    return 79
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   298
11138
99eee847beaa acl: grp module is not available on windows
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def groupmembers(name):
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    # Don't support groups on Windows for now
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    raise KeyError()
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   302
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   303
def isexec(f):
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   304
    return False
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   305
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2aa3e07b2f07 posix, windows: introduce cachestat
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   306
class cachestat(object):
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    def __init__(self, path):
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   308
        pass
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diff changeset
   309
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    def cacheable(self):
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diff changeset
   311
        return False
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diff changeset
   312
8614
573734e7e6d0 cmdutils: Take over glob expansion duties from util
Matt Mackall <mpm@selenic.com>
parents: 8559
diff changeset
   313
expandglobs = True