def setup_keyring(keyring_name):
    '''Setup the keyring'''
    keyring_path = os.path.join("test", "outputdata", keyring_name)
    # Delete the entire keyring
    shutil.rmtree(keyring_path, ignore_errors=True)
    os.makedirs(keyring_path)
    gpg = GPG(gnupghome=keyring_path, gpgbinary="gpg")
    for key_name in ["key1_private", "key1_public"]:
        with open(os.path.join("test", "inputdata", key_name + ".txt"), "r") as keyfile:
            key_str = "".join(keyfile.readlines())
        import_result = gpg.import_keys(key_str)
        print("Import result:", type(import_result))
        print(import_result.__dict__)
        if import_result.count == 1 and len(set(import_result.fingerprints)) == 1:
            print("Got one import result")
    return gpg
def patch_migrate():
    """A workaround for SQLite's inability to alter things

    SQLite abilities to alter tables are very limited (please read
    http://www.sqlite.org/lang_altertable.html for more details).
    E. g. one can't drop a column or a constraint in SQLite. The
    workaround for this is to recreate the original table omitting
    the corresponding constraint (or column).

    sqlalchemy-migrate library has recreate_table() method that
    implements this workaround, but it does it wrong:

        - information about unique constraints of a table
          is not retrieved. So if you have a table with one
          unique constraint and a migration adding another one
          you will end up with a table that has only the
          latter unique constraint, and the former will be lost

        - dropping of unique constraints is not supported at all

    The proper way to fix this is to provide a pull-request to
    sqlalchemy-migrate, but the project seems to be dead. So we
    can go on with monkey-patching of the lib at least for now.

    """

    # this patch is needed to ensure that recreate_table() doesn't drop
    # existing unique constraints of the table when creating a new one
    helper_cls = sqlite.SQLiteHelper
    helper_cls.recreate_table = _recreate_table
    helper_cls._get_unique_constraints = _get_unique_constraints

    # this patch is needed to be able to drop existing unique constraints
    constraint_cls = sqlite.SQLiteConstraintDropper
    constraint_cls.visit_migrate_unique_constraint = \
        _visit_migrate_unique_constraint
    constraint_cls.__bases__ = (ansisql.ANSIColumnDropper,
                                sqlite.SQLiteConstraintGenerator)