mercurial/util.py

15900:29defa7d20f6

unlinkpath = platform.unlinkpath
username = platform.username

# Python compatibility

def sha1(s=''):
    '''
    Low-overhead wrapper around Python's SHA support

    >>> f = _fastsha1

    >>> a.hexdigest()
    'da39a3ee5e6b4b0d3255bfef95601890afd80709'
    '''

    return _fastsha1(s)

_notset = object()
def safehasattr(thing, attr):
    return getattr(thing, attr, _notset) is not _notset

def _fastsha1(s=''):
    # This function will import sha1 from hashlib or sha (whichever is
    # available) and overwrite itself with it on the first call.
    # Subsequent calls will go directly to the imported function.

        from sha import sha as _sha1
    global _fastsha1, sha1
    _fastsha1 = sha1 = _sha1
    return _sha1(s)

import __builtin__

if sys.version_info[0] < 3:
    def fakebuffer(sliceable, offset=0):
        return sliceable[offset:]
else:
    def fakebuffer(sliceable, offset=0):
        return memoryview(sliceable)[offset:]
try:
    buffer
except NameError:
    __builtin__.buffer = fakebuffer

import subprocess
closefds = os.name == 'posix'

def popen2(cmd, env=None, newlines=False):

_fspathcache = {}
def fspath(name, root):
    '''Get name in the case stored in the filesystem

    The name is either relative to root, or it is an absolute path starting
    with root. Note that this function is unnecessary, and should not be
    called, for case-sensitive filesystems (simply because it's expensive).

    Both name and root should be normcase-ed.
    '''
    # If name is absolute, make it relative
    if name.startswith(root):
        l = len(root)
        if name[l] == os.sep or name[l] == os.altsep:
            l = l + 1
        name = name[l:]

    if not os.path.lexists(os.path.join(root, name)):
        return None

    seps = os.sep
    if os.altsep:
        seps = seps + os.altsep

        if dir not in _fspathcache:
            _fspathcache[dir] = os.listdir(dir)
        contents = _fspathcache[dir]

        lenp = len(part)
        for n in contents:
            if lenp == len(n) and normcase(n) == part:
                result.append(n)
                break
        else:
            # Cannot happen, as the file exists!
            result.append(part)
        dir = os.path.join(dir, part)

    return ''.join(result)

def checknlink(testfile):

    >>> url('http://host/a?b#c', parsequery=False, parsefragment=False)
    <url scheme: 'http', host: 'host', path: 'a?b#c'>
    """

    _safechars = "!~*'()+"
    _safepchars = "/!~*'()+"
    _matchscheme = re.compile(r'^[a-zA-Z0-9+.\-]+:').match

    def __init__(self, path, parsequery=True, parsefragment=True):
        # We slowly chomp away at path until we have only the path left
        self.scheme = self.user = self.passwd = self.host = None

    def __str__(self):
        r"""Join the URL's components back into a URL string.

        Examples:

        >>> str(url('http://user:pw@host:80/?foo#bar'))
        'http://user:pw@host:80/?foo#bar'
        >>> str(url('http://user:pw@host:80/?foo=bar&baz=42'))
        'http://user:pw@host:80/?foo=bar&baz=42'
        >>> str(url('http://user:pw@host:80/?foo=bar%3dbaz'))
        'http://user:pw@host:80/?foo=bar%3dbaz'
        >>> str(url('ssh://user:pw@[::1]:2200//home/joe#'))

        >>> str(url('path'))
        'path'
        >>> str(url('file:///tmp/foo/bar'))
        'file:///tmp/foo/bar'
        >>> str(url('file:///c:/tmp/foo/bar'))
        'file:///c%3A/tmp/foo/bar'
        >>> print url(r'bundle:foo\bar')
        bundle:foo\bar
        """
        if self._localpath:
            s = self.path

15937:7ed056f1e97d

unlinkpath = platform.unlinkpath
username = platform.username

# Python compatibility

_notset = object()

def safehasattr(thing, attr):
    return getattr(thing, attr, _notset) is not _notset

def sha1(s=''):
    '''
    Low-overhead wrapper around Python's SHA support

    >>> f = _fastsha1

    >>> a.hexdigest()
    'da39a3ee5e6b4b0d3255bfef95601890afd80709'
    '''

    return _fastsha1(s)

def _fastsha1(s=''):
    # This function will import sha1 from hashlib or sha (whichever is
    # available) and overwrite itself with it on the first call.
    # Subsequent calls will go directly to the imported function.

        from sha import sha as _sha1
    global _fastsha1, sha1
    _fastsha1 = sha1 = _sha1
    return _sha1(s)

try:
    buffer = buffer
except NameError:
    if sys.version_info[0] < 3:
        def buffer(sliceable, offset=0):
            return sliceable[offset:]
    else:
        def buffer(sliceable, offset=0):
            return memoryview(sliceable)[offset:]

import subprocess
closefds = os.name == 'posix'

def popen2(cmd, env=None, newlines=False):

_fspathcache = {}
def fspath(name, root):
    '''Get name in the case stored in the filesystem

    The name should be relative to root, and be normcase-ed for efficiency.

    Note that this function is unnecessary, and should not be
    called, for case-sensitive filesystems (simply because it's expensive).

    The root should be normcase-ed, too.
    '''
    def find(p, contents):
        for n in contents:
            if normcase(n) == p:
                return n
        return None

    seps = os.sep
    if os.altsep:
        seps = seps + os.altsep

        if dir not in _fspathcache:
            _fspathcache[dir] = os.listdir(dir)
        contents = _fspathcache[dir]

        found = find(part, contents)
        if not found:
            # retry "once per directory" per "dirstate.walk" which
            # may take place for each patches of "hg qpush", for example
            contents = os.listdir(dir)
            _fspathcache[dir] = contents
            found = find(part, contents)

        result.append(found or part)
        dir = os.path.join(dir, part)

    return ''.join(result)

def checknlink(testfile):

    >>> url('http://host/a?b#c', parsequery=False, parsefragment=False)
    <url scheme: 'http', host: 'host', path: 'a?b#c'>
    """

    _safechars = "!~*'()+"
    _safepchars = "/!~*'()+:"
    _matchscheme = re.compile(r'^[a-zA-Z0-9+.\-]+:').match

    def __init__(self, path, parsequery=True, parsefragment=True):
        # We slowly chomp away at path until we have only the path left
        self.scheme = self.user = self.passwd = self.host = None

    def __str__(self):
        r"""Join the URL's components back into a URL string.

        Examples:

        >>> str(url('http://user:pw@host:80/c:/bob?fo:oo#ba:ar'))
        'http://user:pw@host:80/c:/bob?fo:oo#ba:ar'
        >>> str(url('http://user:pw@host:80/?foo=bar&baz=42'))
        'http://user:pw@host:80/?foo=bar&baz=42'
        >>> str(url('http://user:pw@host:80/?foo=bar%3dbaz'))
        'http://user:pw@host:80/?foo=bar%3dbaz'
        >>> str(url('ssh://user:pw@[::1]:2200//home/joe#'))

        >>> str(url('path'))
        'path'
        >>> str(url('file:///tmp/foo/bar'))
        'file:///tmp/foo/bar'
        >>> str(url('file:///c:/tmp/foo/bar'))
        'file:///c:/tmp/foo/bar'
        >>> print url(r'bundle:foo\bar')
        bundle:foo\bar
        """
        if self._localpath:
            s = self.path