#-----------------------------------------------------------------------------
#	Copyright 2019 Baho Utot
#-----------------------------------------------------------------------------
#	This program is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
#	(at your option) any later version.

#	This program is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.

#	You should have received a copy of the GNU General Public License
#	along with this program.  If not, see <https://www.gnu.org/licenses/>.
#-----------------------------------------------------------------------------
OVERVIEW:
	This build tracks linux from scratch version 8.4
#-----------------------------------------------------------------------------
REQUIREMENTS:
	1. git installed on the host
	2. wget on host system
	3. Directory for build, mounted at /mnt/lfs

		There will need to be partition mounted there.
		You will be responsible for that.
		This build system uses whatever filesystem
		that is at ${LFS}
	
	4. run version-check.sh and install required packages if needed
#-----------------------------------------------------------------------------
WARNING:
	This build system is designed in such a way to not be
	able to trash your host system.  Mistakes can happen.
	Not responsible for trashed host system.  You
	bear all responsibilities for any failures.
#-----------------------------------------------------------------------------
GENERAL NOTES:
	This system was designed and debugged on an AMD64 {x86_64} system
	and I have not tested it on a i686 system as I no longer have or
	use such systems.

	The build system installs/work directory:
	/mnt/lfs/usr/src/LFS-RPM

	This build has a mkinitramfs step ( which requires cpio ) this step
	creates an initrd so cpu updates and firmware is loaded.
	Your lfs kernel should be configured to use this.

	This build has Microcode updates for AMD CPUs.
	To use it make a link to the proper cpu family.
	See BLFS book for more information.

	I have installed rpm macro files in:
	/home/lfs/.rpmmacros
	This makes the rpm environment correct so it builds
	the base system correctly.
#-----------------------------------------------------------------------------
ADDITIONS:
	cpio			# needed for mkinitramfs
	mkinitramfs		# to create initrd
	popt			# needed for rpm
	python2		# needed for rpm
	rpm			# package manager
	wget			# needed to fetch packages
	firmware-radeon	# firmware for radeon graphics
	firmware-realtek	# firmware for realtek network
	firmware-amd-ucode	# microcode updates for AMD CPUs
#-----------------------------------------------------------------------------
BUILD PROCEDURE:
	login as root user
	fdisk /dev/sdx			partition drive, you need to do this
	mkfs.ext4 /dev/sdxx			create ext4 filesystem
	
	install -vdm 755 /mnt/lfs		create lfs directory
	mount /dev/sdxx /mnt/lfs		mount partition to work directory
	install -vdm 755 /mnt/lfs/usr/src	create build directory
	cd /mnt/lfs/usr/src			goto build directory
	
	Now fetch the build system it will go into /mnt/lfs/usr/src/LFS-RPM by default
	git clone https://github.com/baho-utot/LFS-RPM.git
	
	cd LFS-RPM				Lets do this
	./setup.sh				setup environment and fetches source tarballs
	./lfs.sh				build it
	./cleanup.sh				cleanup host
	
	Build at this point is complete.
	All that is needed is to install grub and/or add a menu item in the
	the grub configuration file /boot/grub.cfg
This completes the build.
#-----------------------------------------------------------------------------
GRUB:

	GPT partitioned drive
	menuentry 'Linux From Scratch (8.4) (on /dev/sdxx)' {
		insmod part_gpt
		insmod ext2
		set root='hdx,gptx'
		linux /boot/vmlinuz-4.20.12 root=/dev/sdxx
		initrd /boot/initrd.img-4.20.12
	}

	MSDOS/BIOS partitioned drive
		menuentry 'Linux From Scratch (8.4) (on /dev/sdxx)' {
		insmod part_msdos
		insmod ext2
		set root='hdx,msdosx'
		linux /boot/vmlinuz-4.20.12 root=/dev/sdxx
		initrd /boot/initrd.img-4.20.12
	}
	Change the x's to the proper drives and partition
#-----------------------------------------------------------------------------
INSTALLER SCRIPT:
	The installer.sh script will take the binary rpms ( chapter 6 ) and
	install them into a partition that YOU mounted on /mnt.  If you want
	to install else where then change ROOTPATH="/mnt" to the installation
	partition mounted by YOU.
#-----------------------------------------------------------------------------
SCRIPTS:
	base.sh*		builds chapter 6
	cleanup.sh*		cleanup host system after build
	installer.sh*		install rpm binaries to mounted partition
	lfs.sh*		builds the whole thing
	setup.sh*		configure for build
	tools.sh*		builds chapter 5
	version-check.sh*	checks host system for requirements