try:

        if not check_repo_fast(repo_name, base_path):

            return False

        r = hg.repository(ui.ui(), repo_path)

        if verify:

            hg.verify(r)

        #here we hnow that repo exists it was verified

        log.info('%s repo is already created', repo_name)

        return False

    except RepoError:

        #it means that there is no valid repo there...

        log.info('%s repo is free for creation', repo_name)

        return True

def ask_ok(prompt, retries=4, complaint='Yes or no, please!'):

    while True:

        ok = raw_input(prompt)

        if ok in ('y', 'ye', 'yes'): return True

        if ok in ('n', 'no', 'nop', 'nope'): return False

        retries = retries - 1

        if retries < 0: raise IOError

        print complaint

@cache_region('super_short_term', 'cached_hg_ui')

def get_hg_ui_cached():

    try:

        sa = meta.Session

        ret = sa.query(HgAppUi).all()

    finally:

        meta.Session.remove()

    return ret

def get_hg_settings():

    try:

        sa = meta.Session

        ret = sa.query(HgAppSettings).all()

    finally:

        meta.Session.remove()

    if not ret:

        raise Exception('Could not get application settings !')

    settings = {}

    for each in ret:

        settings['hg_app_' + each.app_settings_name] = each.app_settings_value    

    return settings

def make_ui(read_from='file', path=None, checkpaths=True):        

    """

    A function that will read python rc files or database

    and make an mercurial ui object from read options

    @param path: path to mercurial config file

    @param checkpaths: check the path

    @param read_from: read from 'file' or 'db'

    """

    #propagated from mercurial documentation

    baseui = ui.ui()

    if read_from == 'file':

        if not os.path.isfile(path):

            log.warning('Unable to read config file %s' % path)

            return False

        cfg = config.config()

        cfg.read(path)

            for k, v in cfg.items(section):

                baseui.setconfig(section, k, v)

        if checkpaths:check_repo_dir(cfg.items('paths'))                

    elif read_from == 'db':

        hg_ui = get_hg_ui_cached()

        for ui_ in hg_ui:

            baseui.setconfig(ui_.ui_section, ui_.ui_key, ui_.ui_value)

    return baseui

def set_hg_app_config(config):

    hgsettings = get_hg_settings()

    for k, v in hgsettings.items():

        config[k] = v

def invalidate_cache(name, *args):

    """Invalidates given name cache"""

    from beaker.cache import region_invalidate

    log.info('INVALIDATING CACHE FOR %s', name)

    """propagate our arguments to make sure invalidation works. First

    argument has to be the name of cached func name give to cache decorator

    without that the invalidation would not work"""

    tmp = [name]

    tmp.extend(args)

    args = tuple(tmp)

    if name == 'cached_repo_list':

        from pylons_app.model.hg_model import _get_repos_cached

        region_invalidate(_get_repos_cached, None, *args)

    if name == 'full_changelog':

        from pylons_app.model.hg_model import _full_changelog_cached

        region_invalidate(_full_changelog_cached, None, *args)

class EmptyChangeset(BaseChangeset):

    revision = -1

    message = ''

    @LazyProperty

    def raw_id(self):