mercurial/scmutil.py

37970:76e933e0ccc9

def shortesthexnodeidprefix(repo, node, minlength=1):
    """Find the shortest unambiguous prefix that matches hexnode."""
    # _partialmatch() of filtered changelog could take O(len(repo)) time,
    # which would be unacceptably slow. so we look for hash collision in
    # unfiltered space, which means some hashes may be slightly longer.
    try:
        return repo.unfiltered().changelog.shortest(node, minlength)
    except error.LookupError:
        raise error.RepoLookupError()

def isrevsymbol(repo, symbol):
    """Checks if a symbol exists in the repo.

37971:3ac950cd5978

def shortesthexnodeidprefix(repo, node, minlength=1):
    """Find the shortest unambiguous prefix that matches hexnode."""
    # _partialmatch() of filtered changelog could take O(len(repo)) time,
    # which would be unacceptably slow. so we look for hash collision in
    # unfiltered space, which means some hashes may be slightly longer.
    cl = repo.unfiltered().changelog

    def isrev(prefix):
        try:
            i = int(prefix)
            # if we are a pure int, then starting with zero will not be
            # confused as a rev; or, obviously, if the int is larger
            # than the value of the tip rev
            if prefix[0] == '0' or i > len(cl):
                return False
            return True
        except ValueError:
            return False

    def disambiguate(prefix):
        """Disambiguate against revnums."""
        hexnode = hex(node)
        for length in range(len(prefix), 41):
            prefix = hexnode[:length]
            if not isrev(prefix):
                return prefix

    try:
        return disambiguate(cl.shortest(node, minlength))
    except error.LookupError:
        raise error.RepoLookupError()

def isrevsymbol(repo, symbol):
    """Checks if a symbol exists in the repo.