#!/bin/bash
grub_dir_i386_efi=arch/i386/efi/grub
grub_dir_i386_bios=arch/i386/bios/grub
grub_dir_x86_64_efi=arch/x86_64/efi/grub
#编译核心数目
nproc=8

#检测grub是否已经安装
if [ -d ${grub_dir_i386_efi}/bin ] || [ -d ${grub_dir_i386_bios}/bin ] || [ -d ${grub_dir_x86_64_efi}/bin ] ; then
	exit 0
fi
#仅支持Ubuntu/Debain下的自动安装
if ! hash 2>/dev/null apt-get; then
	echo "脚本暂不支持对该系统下grub的安装，请手动完成"
	exit 0
fi
#下载grub2.06
echo "开始下载grub2.06"
wget https://ftp.gnu.org/gnu/grub/grub-2.06.tar.gz
echo "下载完成"
tar -xvzf grub-2.06.tar.gz
#安装对应依赖
sudo apt-get update
sudo apt-get install -y \
	make \
  	binutils \
  	bison \
  	gcc \
  	gettext \
	flex\
	bison\
	automake\
	autoconf\	
	
cd grub-2.06
echo "开始安装grub2.06"
#编译安装三个版本的grub
./configure --target=i386 --prefix=$(dirname $PWD)/${grub_dir_i386_bios}
make -j $(nporc)
make install
make clean 

./configure --target=i386 --with-platform=efi --prefix=$(dirname $PWD)/${grub_dir_i386_efi}
make -j $(nporc)
make install
make clean 

./configure --target=x86_64 --with-platform=efi --prefix=$(dirname $PWD)/${grub_dir_x86_64_efi}
make -j $(nporc)
make install

cd ..
#解除权限限制
sudo chmod -R 777 ${grub_dir_i386_bios}
sudo chmod -R 777 ${grub_dir_i386_efi}
sudo chmod -R 777 ${grub_dir_x86_64_efi}
rm -rf grub-2.06
rm grub-2.06.tar.gz
echo "grub2.06安装完成"