mbfl_declare_action_set HELP
mbfl_declare_action HELP HELP_USAGE NONE                        \
    usage                                                       \
    'Print the help screen and exit.'
mbfl_declare_action HELP HELP_PRINT_COMPLETIONS_SCRIPT NONE     \
    print-completions-script                                    \
    'Print the completions script for this program.'

mbfl_declare_action_set MAIN
mbfl_declare_action MAIN HELP HELP                              \
    help                                                        \
    'Help the user of this script.'

declare -r COMPLETIONS_SCRIPT_NAMESPACE='p-mbfl-examples'

function script_before_parsing_options_HELP () {
    script_USAGE="usage: ${script_PROGNAME} help [action] [options]"
    script_DESCRIPTION='Help the user of this program.'
}
function script_action_HELP () {
    # By faking the  selection of the MAIN action: we  cause "mbfl_main_print_usage_screen_brief" to
    # print the main usage screen.
    mbfl_actions_fake_action_set MAIN
    mbfl_main_print_usage_screen_brief
}

function script_before_parsing_options_HELP_USAGE () {
    script_USAGE="usage: ${script_PROGNAME} help usage [options]"
    script_DESCRIPTION='Print the usage screen and exit.'
}
function script_action_HELP_USAGE () {
    if mbfl_wrong_num_args 0 $ARGC
    then
        # By faking the selection of  the MAIN action: we cause "mbfl_main_print_usage_screen_brief"
        # to print the main usage screen.
        mbfl_actions_fake_action_set MAIN
        mbfl_main_print_usage_screen_brief
    else
        mbfl_main_print_usage_screen_brief
        exit_because_wrong_num_args
    fi
}

function script_before_parsing_options_HELP_PRINT_COMPLETIONS_SCRIPT () {
    script_PRINT_COMPLETIONS="usage: ${script_PROGNAME} help print-completions-script [options]"
    script_DESCRIPTION='Print the command-line completions script and exit.'
}
function script_action_HELP_PRINT_COMPLETIONS_SCRIPT () {
    if mbfl_wrong_num_args 0 $ARGC
    then mbfl_actions_completion_print_script "$COMPLETIONS_SCRIPT_NAMESPACE" "$script_PROGNAME"
    else
        mbfl_main_print_usage_screen_brief
        exit_because_wrong_num_args
    fi
}