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#!/bin/sh

# lh_binary_silo(1) - installs silo into binary
# Copyright (C) 2006-2008 Daniel Baumann <daniel@debian.org>
#
# live-helper comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
# This is free software, and you are welcome to redistribute it
# under certain conditions; see COPYING for details.

set -e

# Including common functions
LH_BASE="${LH_BASE:-/usr/share/live-helper}"

for FUNCTION in "${LH_BASE}"/functions/*.sh
do
	. "${FUNCTION}"
done

# Setting static variables
DESCRIPTION="installs silo into binary"
HELP=""
USAGE="${PROGRAM} [--force]"

Arguments "${@}"

# Reading configuration files
Read_conffile config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

if [ "${LH_BOOTLOADER}" != "silo" ]
then
	exit 0
fi

Echo_message "Begin installing silo..."

# Requiring stage file
Require_stagefile .stage/bootstrap

# Checking stage file
Check_stagefile .stage/binary_silo

# Checking silo templates
Check_templates silo 

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

# Check architecture
Check_architecture sparc

# Checking depends
Check_package chroot/usr/sbin/silo silo

# Restoring cache
Restore_cache cache/packages_binary

# Installing depends
Install_package

# Local functions
Silo_live_entry ()
{
	LABEL="${1}"
	KERNEL="${2}"
	INITRD="${3}"
	APPEND="${4}"

	DIRECTORY="/$(basename ${DESTDIR_LIVE})"

	LINUX_LIVE="${LINUX_LIVE}\nimage=${DIRECTORY}/${KERNEL}\n"
	LINUX_LIVE="${LINUX_LIVE}\t  label=${LABEL}\n"
	LINUX_LIVE="${LINUX_LIVE}\t  initrd=${DIRECTORY}/${INITRD}\n"
	LINUX_LIVE="${LINUX_LIVE}\t  append=\"boot=${INITFS} LH_BOOTAPPEND_LIVE ${APPEND}\"\n"
}


Silo_install_entry ()
{
	LABEL="${1}"
	KERNEL="${2}"
	INITRD="${3}"
	APPEND="${4}"

	DIRECTORY="/$(basename ${DESTDIR_INSTALL})"

	if [ "${LH_DISTRIBUTION}" != "etch" ] && [ "${LABEL}" != "rescue" ] && [ "${LABEL}" != "rescuegui" ]
	then
		APPEND="${APPEND} quiet"
	fi

	LINUX_INSTALL="${LINUX_INSTALL}\nimage=${DIRECTORY}/${KERNEL}\n"
	LINUX_INSTALL="${LINUX_INSTALL}\t  label=${LABEL}\n"
	LINUX_INSTALL="${LINUX_INSTALL}\t  initrd=${DIRECTORY}/${INITRD}\n"
	LINUX_INSTALL="${LINUX_INSTALL}\t  append=\"LH_BOOTAPPEND_LIVE ${APPEND} LH_BOOTAPPEND_INSTALL\"\n"
}

case "${LH_INITRAMFS}" in
	casper)
		INITFS="casper"
		;;

	live-initramfs)
		INITFS="live"
		;;
esac

# Setting destination directory
case "${LH_BINARY_IMAGES}" in
	iso|usb-hdd)
		case "${LH_INITRAMFS}" in
			casper)
				DESTDIR_LIVE="binary/casper"
				;;

			live-initramfs)
				DESTDIR_LIVE="binary/live"
				;;
		esac

		DESTDIR_INSTALL="binary/install"
		;;

	net|tar)
		Echo_error "not yet supported, aborting (FIXME)."
		exit 1
	;;
esac

# Creating directory
mkdir -p "${DESTDIR_LIVE}"

# Setting boot parameters
case "${LH_ENCRYPTION}" in
	""|disabled)
		;;
	*)
		LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} encryption=${LH_ENCRYPTION}"
		;;
esac

if [ -n "${LH_USERNAME}" ]
then
	case "${LH_INITRAMFS}" in
		casper)
			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} username=${LH_USERNAME}"
			;;

		live-initramfs)
			if [ "${LH_USERNAME}" != "user" ]
			then
				LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} username=${LH_USERNAME}"
			fi
			;;
	esac
fi

if [ -n "${LH_HOSTNAME}" ]
then
	case "${LH_INITRAMFS}" in
		casper)
			LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} hostname=${LH_HOSTNAME}"
			;;

		live-initramfs)
			if [ "${LH_HOSTNAME}" != "debian" ]
			then
				LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} hostname=${LH_HOSTNAME}"
			fi
			;;
	esac
fi

if [ "${LH_UNION_FILESYSTEM}" != "unionfs" ]
then
	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} union=${LH_UNION_FILESYSTEM}"
fi

if [ -n "${LH_NET_COW_PATH}" ]
then
	Echo_error "Net cow not supported on silo"
	exit 1
fi

if [ "${LH_EXPOSED_ROOT}" != "disabled" ]
then
	LH_BOOTAPPEND_LIVE="${LH_BOOTAPPEND_LIVE} exposedroot"
fi

LH_BOOTAPPEND_LIVE="$(echo ${LH_BOOTAPPEND_LIVE} | sed -e 's|  ||')"

# Parameters are listed at: linux/Documentation/kernel-parameters.txt
FAILSAFE="noapic noapm nodma nomce nolapic nosmp vga=ofonly"

# Assembling kernel configuration

# Default entries
DEFAULT_FLAVOUR="$(echo ${LH_LINUX_FLAVOURS} | awk '{ print $1 }')"
DEFAULT_KERNEL="$(basename chroot/boot/vmlinuz-*${DEFAULT_FLAVOUR})"
DEFAULT_INITRD="initrd.img-$(echo ${DEFAULT_KERNEL} | sed -e 's|vmlinuz-||')"

Silo_live_entry "live" "${DEFAULT_KERNEL}" "${DEFAULT_INITRD}"
Silo_live_entry "live-failsafe" "${DEFAULT_KERNEL}" "${DEFAULT_INITRD}" "${FAILSAFE}"

if [ "$(echo ${LH_LINUX_FLAVOURS} | wc -w)" -gt "1" ]
then
	for KERNEL in chroot/boot/vmlinuz-*
	do
		KERNEL_IMAGE="$(basename ${KERNEL})"
		KERNEL_VERSION="$(echo ${KERNEL_IMAGE} | sed -e 's|vmlinuz-||')"
		INITRD="initrd.img-${KERNEL_VERSION}"

		Silo_live_entry "live-${KERNEL_VERSION}" "${KERNEL_IMAGE}" "${INITRD}"
		Silo_live_entry "live-${KERNEL_VERSION}-failsafe" "${KERNEL_IMAGE}" "${INITRD}" "${FAILSAFE}"
	done
fi

LINUX_LIVE="$(/bin/echo ${LINUX_LIVE} | sed -e 's|binary||g' -e 's|//|/|g')"

# Assembling debian-installer configuration
if [ "${LH_DEBIAN_INSTALLER}" != "disabled" ]
then
	VMLINUZ_DI="vmlinuz"
	INITRD_DI="initrd.gz"
	APPEND_DI="vga=normal"

	Silo_install_entry "linux" "${VMLINUZ_DI}" "${INITRD_DI}" "${APPEND_DI}"
	Silo_install_entry "install" "${VMLINUZ_DI}" "${INITRD_DI}" "${APPEND_DI}"
	Silo_install_entry "expert" "${VMLINUZ_DI}" "${INITRD_DI}" "priority=low ${APPEND_DI}"
	Silo_install_entry "rescue" "${VMLINUZ_DI}" "${INITRD_DI}" "rescue/enable=true ${APPEND_DI}"
	Silo_install_entry "auto" "${VMLINUZ_DI}" "${INITRD_DI}" "auto=true priority=critical ${APPEND_DI}"
fi

LINUX_INSTALL="$(/bin/echo ${LINUX_INSTALL} | sed -e 's|binary||g' -e 's|//|/|g')"

case "${LH_BINARY_IMAGES}" in
	iso|usb-hdd)
		# Copying silo
		mkdir -p binary/boot

		case "${LH_CHROOT_BUILD}" in
			enabled)
				cp chroot/boot/second.b binary/boot
				;;

			disabled)
				cp /boot/second.b binary/boot
				;;
		esac

		cp -r "${TEMPLATES}"/* binary/boot

		if [ "${LH_DEBIAN_INSTALLER}" = "disabled" ]
		then
			rm -f binary/boot/debian.txt.install
		else
			mv binary/boot/debian.txt.install binary/boot/debian.txt
		fi

		# Configure silo templates
		sed -i -e "s|LINUX_LIVE|${LINUX_LIVE}|" \
		       -e "s|LINUX_INSTALL|${LINUX_INSTALL}|" \
		       binary/boot/silo.conf
		sed -i -e "s|LH_BOOTAPPEND_INSTALL|${LH_BOOTAPPEND_INSTALL}|" \
		       -e "s|LH_BOOTAPPEND_LIVE|${LH_BOOTAPPEND_LIVE}|" \
		       binary/boot/silo.conf
		sed -i -e "s|LH_DATE|$(date +%Y%m%d)|" \
		       -e "s|LH_VERSION|${VERSION}|" \
		       -e "s|LH_DISTRIBUTION|${LH_DISTRIBUTION}|" \
		       binary/boot/debian.txt
		;;
esac

# Saving cache
Save_cache cache/packages_binary

# Removing depends
Remove_package

# Creating stage file
Create_stagefile .stage/binary_silo