How to use the tern.report.errors function in tern

origin_layer = 'Layer: ' + image_layer.fs_hash[:10]
    if image_layer.created_by:
        instruction = created_to_instruction(image_layer.created_by)
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            formats.dockerfile_line.format(dockerfile_instruction=instruction),
            'info'))
    else:
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            formats.no_created_by, 'warning'))
    command_line = instruction.split(' ', 1)[1]
    # Image layers are created with the directives RUN, ADD and COPY
    # For ADD and COPY instructions, there is no information about the
    # packages added
    if 'ADD' in instruction or 'COPY' in instruction:
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            errors.unknown_content.format(files=command_line), 'warning'))
        # return an empty list as we cannot find any commands
        return []
    # for RUN instructions we can return a list of commands
    command_list, msg = common.filter_install_commands(command_line)
    if msg:
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            msg, 'warning'))
    return command_list

def setup(dockerfile=None, image_tag_string=None):
    '''Any initial setup'''
    # generate random names for image, container, and tag
    general.initialize_names()
    # load the cache
    cache.load()
    # load dockerfile if present
    if dockerfile:
        dhelper.load_docker_commands(dockerfile)
    # check if the docker image is present
    if image_tag_string:
        if not container.check_image(image_tag_string):
            # if no docker image is present, try to pull it
            if not container.pull_image(image_tag_string):
                logger.fatal("%s", errors.cannot_find_image.format(
                    imagetag=image_tag_string))
                sys.exit()
    # create temporary working directory
    if not os.path.exists(constants.temp_folder):
        os.mkdir(constants.temp_folder)
    # set up folders for rootfs operations
    rootfs.set_up()

master_list = []
    # find the binary by mounting the base layer
    target = rootfs.mount_base_layer(image_obj.layers[0].tar_file)
    binary = common.get_base_bin()
    # set up a notice origin referring to the base command library listing
    origin_command_lib = formats.invoking_base_commands
    # set up a notice origin for the first layer
    origin_first_layer = 'Layer: ' + image_obj.layers[0].fs_hash[:10]
    # find the shell to invoke commands in
    shell, _ = command_lib.get_image_shell(
        command_lib.get_base_listing(binary))
    if not shell:
        # add a warning notice for no shell in the command library
        logger.warning('No shell listing in command library. '
                       'Using default shell')
        no_shell_message = errors.no_shell_listing.format(
            binary=binary, default_shell=constants.shell)
        image_obj.layers[0].origins.add_notice_to_origins(
            origin_command_lib, Notice(no_shell_message, 'warning'))
        # add a hint notice to add the shell to the command library
        add_shell_message = errors.no_listing_for_base_key.format(
            listing_key='shell')
        image_obj.layers[0].origins.add_notice_to_origins(
            origin_command_lib, Notice(add_shell_message, 'hint'))
        shell = constants.shell
    # only extract packages if there is a known binary and the layer is not
    # cached
    if binary:
        if not common.load_from_cache(image_obj.layers[0], redo):
            # Determine pacakge/os style from binary in the image layer
            common.get_os_style(image_obj.layers[0], binary)
            # get the packages of the first layer

create_top_dir()
    if args.log_stream:
        # set up console logs
        global logger
        global console
        logger.addHandler(console)
    logger.debug('Starting...')
    if args.clear_cache:
        logger.debug('Clearing cache...')
        cache.clear()
    if hasattr(args, 'name') and args.name == 'report':
        if args.dockerfile:
            run.execute_dockerfile(args)
        if args.docker_image:
            if common.check_tar(args.docker_image):
                logger.error("%s", errors.incorrect_raw_option)
            else:
                run.execute_docker_image(args)
                logger.debug('Report completed.')
        if args.raw_image:
            if not common.check_tar(args.raw_image):
                logger.error("%s", errors.invalid_raw_image.format(
                    image=args.raw_image))
            else:
                run.execute_docker_image(args)
                logger.debug('Report completed.')
    logger.debug('Finished')

common.get_os_style(image_obj.layers[0], binary)
            # get the packages of the first layer
            try:
                rootfs.prep_rootfs(target)
                common.add_base_packages(image_obj.layers[0], binary, shell)
            except KeyboardInterrupt:
                logger.critical(errors.keyboard_interrupt)
                abort_analysis()
            # unmount proc, sys and dev
            rootfs.undo_mount()
    else:
        logger.warning(errors.no_package_manager)
        # /etc/os-release may still be present even if binary is not
        common.get_os_style(image_obj.layers[0], None)
        image_obj.layers[0].origins.add_notice_to_origins(
            origin_first_layer, Notice(errors.no_package_manager, 'warning'))
        # no binary means there is no shell so set to default shell
        logger.warning('Unknown filesystem. Using default shell')
        shell = constants.shell
    # unmount the first layer
    rootfs.unmount_rootfs()
    # populate the master list with all packages found in the first layer
    for p in image_obj.layers[0].packages:
        master_list.append(p)
    return shell

os_guess = command_lib.check_os_guess(binary)
    if get_os_release():
        # We know with high degree of certainty what the OS is
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            formats.os_release.format(os_style=get_os_release()), 'info'))
    elif binary is None:
        # No binary and no os-release means we have no idea about base OS
        image_layer.origins.add_notice_to_origins(origin_layer, Notice(
            errors.no_etc_release, 'warning'))
    else:
        # We make a guess about the OS based on pkg_format + binary
        # First check that binary exists in base.yml
        if not pkg_format or not os_guess:
            image_layer.origins.add_notice_to_origins(
                origin_command_lib, Notice(
                    errors.no_listing_for_base_key.format(listing_key=binary),
                    'warning'))
        else:
            # Assign image layer attributes and guess OS
            image_layer.pkg_format = pkg_format
            image_layer.os_guess = os_guess
            image_layer.origins.add_notice_to_origins(origin_layer, Notice(
                formats.os_style_guess.format(
                    package_manager=binary,
                    package_format=image_layer.pkg_format,
                    os_list=image_layer.os_guess), 'info'))

# cached
    if binary:
        if not common.load_from_cache(image_obj.layers[0], redo):
            # Determine pacakge/os style from binary in the image layer
            common.get_os_style(image_obj.layers[0], binary)
            # get the packages of the first layer
            rootfs.prep_rootfs(target)
            common.add_base_packages(image_obj.layers[0], binary, shell)
            # unmount proc, sys and dev
            rootfs.undo_mount()
    else:
        logger.warning(errors.no_package_manager)
        # /etc/os-release may still be present even if binary is not
        common.get_os_style(image_obj.layers[0], None)
        image_obj.layers[0].origins.add_notice_to_origins(
            origin_first_layer, Notice(errors.no_package_manager, 'warning'))
        # no binary means there is no shell so set to default shell
        logger.warning('Unknown filesystem. Using default shell')
        shell = constants.shell
    # unmount the first layer
    rootfs.unmount_rootfs()
    # populate the master list with all packages found in the first layer
    for p in image_obj.layers[0].packages:
        master_list.append(p)
    # get packages for subsequent layers
    curr_layer = 1
    while curr_layer < len(image_obj.layers):
        if not common.load_from_cache(image_obj.layers[curr_layer], redo):
            # get commands that created the layer
            # for docker images this is retrieved from the image history
            command_list = dhelper.get_commands_from_history(
                image_obj.layers[curr_layer])