#!/usr/bin/env bash

ENABLED=yes
[ "$ENABLED" != "yes" ] && exit 0

SELF_NAME="grub-functions"

PATH_GRUB="/memory/data/from/0/boot/grub/"

exec_get_all_menuentry(){
## Показать все варианты загрузки из grub_*.cfg   grub_*_addon.cfg   grub_*_boothdd.cfg
    FILE_OSRELEASE="/etc/os-release"
    NAME_DISTRIB=$(sed -En "/VARIANT=/{s/VARIANT=\"(.*)\"/\1/p}" ${FILE_OSRELEASE})
    VER_DISTRIB=$(sed -En "/VERSION_ID=/{s/VERSION_ID=(.*)/\1/p}" ${FILE_OSRELEASE})

    FILE_GRUB_MAIN="${PATH_GRUB}/ublinux/grub_${LANG%_*}.cfg"
    sed -En "/menuentry/{
	/(ISO|Install|Установка)/!{
	    s/^[ \t]*//
	    s/\\$\{NAME_DISTRIB\}/${NAME_DISTRIB}/
	    s/\\$\{VER_DISTRIB\}/${VER_DISTRIB}/
	    s/menuentry \"(.*${NAME_DISTRIB}.*${VER_DISTRIB}.*)\" .*/\1/p
	}
    }" ${FILE_GRUB_MAIN}


    FILE_GRUB_ADDON="${PATH_GRUB}/ublinux/grub_${LANG%_*}_addon.cfg"
    NAME_MENU_GRUB_ADDON=$(sed -En "/${FILE_GRUB_ADDON##*/}/{x;{s/menuentry \"(.*)\" .*/\1/p};d;}; x" ${FILE_GRUB_MAIN})
    sed -En "/menuentry/{
	/(ISO|Install|Установка)/!{
	    s/^[ \t]*/${NAME_MENU_GRUB_ADDON}>/
	    s/\\$\{NAME_DISTRIB\}/${NAME_DISTRIB}/
	    s/\\$\{VER_DISTRIB\}/${VER_DISTRIB}/
	    s/menuentry \"(.*${NAME_DISTRIB}.*${VER_DISTRIB}.*)\" .*/\1/p
	}
    }" ${FILE_GRUB_ADDON}
    
    FILE_GRUB_BOOTHDD="${PATH_GRUB}/ublinux/grub_${LANG%_*}_boothdd.cfg"
    NAME_MENU_GRUB_BOOTHDD=$(sed -En "/${FILE_GRUB_BOOTHDD##*/}/{x;{s/menuentry \"(.*)\" .*/\1/p};d;}; x" ${FILE_GRUB_MAIN})
    sed -En "/menuentry/{
	/(Back|Возврат)/!{
	    s/^[ \t]*/${NAME_MENU_GRUB_BOOTHDD}>/
	    s/\\$\{VER_DISTRIB\}/${VER_DISTRIB}/
	    s/menuentry \"(.*)\" .*/\1/p
	}
    }" ${FILE_GRUB_BOOTHDD}
}

exec_get_last_menuentry(){
## Показать последний выбранный вариант загрузки
    FILE_GRUBENV="${PATH_GRUB}/grubenv"
    sed -En "/saved_entry=/{s/saved_entry=(.*)/\1/p}" ${FILE_GRUBENV}
}

################
##### MAIN #####
################

# Возможность подключить как source из любого скрипта и вызов встроенных функций

    if [[ ${0##*/} == ${SELF_NAME} ]]; then
	while [[ $# -gt 0 ]]; do
	    declare -f ${1} &>/dev/null && FUNCTION+="; ${1}" && shift || { FUNCTION+=" ${1}" && shift; }
	done
	eval ${FUNCTION#*; }
    else
	true
    fi