liquibase-core/src/main/java/liquibase/integration/commandline/Main.java
private static boolean isNoArgCommand(String arg) {
        return COMMANDS.MIGRATE.equals(arg)
                || COMMANDS.MIGRATE_SQL.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE_SQL.equalsIgnoreCase(arg)
                || COMMANDS.FUTURE_ROLLBACK_SQL.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE_TESTING_ROLLBACK.equalsIgnoreCase(arg)
                || COMMANDS.LIST_LOCKS.equalsIgnoreCase(arg)
                || COMMANDS.DROP_ALL.equalsIgnoreCase(arg)
                || COMMANDS.RELEASE_LOCKS.equalsIgnoreCase(arg)
                || COMMANDS.VALIDATE.equalsIgnoreCase(arg)
                || COMMANDS.HELP.equalsIgnoreCase(arg)
                || COMMANDS.CLEAR_CHECKSUMS.equalsIgnoreCase(arg)
                || COMMANDS.CHANGELOG_SYNC.equalsIgnoreCase(arg)
                || COMMANDS.CHANGELOG_SYNC_SQL.equalsIgnoreCase(arg)
                || COMMANDS.MARK_NEXT_CHANGESET_RAN.equalsIgnoreCase(arg)
                || COMMANDS.MARK_NEXT_CHANGESET_RAN_SQL.equalsIgnoreCase(arg);
    }
private static boolean isNoArgCommand(String arg) {
        return COMMANDS.MIGRATE.equals(arg)
                || COMMANDS.MIGRATE_SQL.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE_SQL.equalsIgnoreCase(arg)
                || COMMANDS.FUTURE_ROLLBACK_SQL.equalsIgnoreCase(arg)
                || COMMANDS.UPDATE_TESTING_ROLLBACK.equalsIgnoreCase(arg)
                || COMMANDS.LIST_LOCKS.equalsIgnoreCase(arg)
                || COMMANDS.DROP_ALL.equalsIgnoreCase(arg)
                || COMMANDS.RELEASE_LOCKS.equalsIgnoreCase(arg)
                || COMMANDS.VALIDATE.equalsIgnoreCase(arg)
                || COMMANDS.HELP.equalsIgnoreCase(arg)
                || COMMANDS.CLEAR_CHECKSUMS.equalsIgnoreCase(arg)
                || COMMANDS.CHANGELOG_SYNC.equalsIgnoreCase(arg)
                || COMMANDS.CHANGELOG_SYNC_SQL.equalsIgnoreCase(arg)
                || COMMANDS.MARK_NEXT_CHANGESET_RAN.equalsIgnoreCase(arg)
                || COMMANDS.MARK_NEXT_CHANGESET_RAN_SQL.equalsIgnoreCase(arg);
    }
Returns true if the given main command arg needs no special parameters.

@param arg the main command to test
@return true if arg is a valid main command and needs no special parameters, false in all other cases