comparison mercurial/util.py @ 21908:cad9dadc9d26

util: move compilere to a class

We do this to allow us to use descriptors for other related methods.

For now, util.compilere does the same thing. Upcoming patches will remove it.

21907:7e5dfa00e3c2

    import re2
    _re2 = None
except ImportError:
    _re2 = False

def compilere(pat, flags=0):
    '''Compile a regular expression, using re2 if possible

    For best performance, use only re2-compatible regexp features. The
    only flags from the re module that are re2-compatible are
    IGNORECASE and MULTILINE.'''
    global _re2
    if _re2 is None:
        try:
            # check if match works, see issue3964
            _re2 = bool(re2.match(r'\[([^\[]+)\]', '[ui]'))
        except ImportError:
            _re2 = False
    if _re2 and (flags & ~(remod.IGNORECASE | remod.MULTILINE)) == 0:
        if flags & remod.IGNORECASE:
            pat = '(?i)' + pat
        if flags & remod.MULTILINE:
            pat = '(?m)' + pat
        try:
            return re2.compile(pat)
        except re2.error:
            pass
    return remod.compile(pat, flags)

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

21908:cad9dadc9d26

    import re2
    _re2 = None
except ImportError:
    _re2 = False

class _re(object):
    def compile(self, pat, flags=0):
        '''Compile a regular expression, using re2 if possible

        For best performance, use only re2-compatible regexp features. The
        only flags from the re module that are re2-compatible are
        IGNORECASE and MULTILINE.'''
        global _re2
        if _re2 is None:
            try:
                # check if match works, see issue3964
                _re2 = bool(re2.match(r'\[([^\[]+)\]', '[ui]'))
            except ImportError:
                _re2 = False
        if _re2 and (flags & ~(remod.IGNORECASE | remod.MULTILINE)) == 0:
            if flags & remod.IGNORECASE:
                pat = '(?i)' + pat
            if flags & remod.MULTILINE:
                pat = '(?m)' + pat
            try:
                return re2.compile(pat)
            except re2.error:
                pass
        return remod.compile(pat, flags)

re = _re()
compilere = re.compile

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