comparison mercurial/util.py @ 26847:9f16787cbefd

util: drop Python 2.4 compat by directly importing md5 and sha1

There's been a fair amount of cruft here over the years, which we can all
just get rid of now.

26846:7c1b4840c2cd

_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 = sha1()
    >>> a = f()
    >>> 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.
    if sys.version_info >= (2, 5):
        from hashlib import sha1 as _sha1
    else:
        from sha import sha as _sha1
    global _fastsha1, sha1
    _fastsha1 = sha1 = _sha1
    return _sha1(s)

def md5(s=''):
    try:
        from hashlib import md5 as _md5
    except ImportError:
        from md5 import md5 as _md5
    global md5
    md5 = _md5
    return _md5(s)

DIGESTS = {
    'md5': md5,
    'sha1': sha1,
}

26847:9f16787cbefd

_notset = object()

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

from hashlib import md5, sha1

DIGESTS = {
    'md5': md5,
    'sha1': sha1,
}