#!/bin/bash

function log()
{
    echo "$1" >> /tmp/install_kernel.log
}

function die()
{
	echo " (EE) $1"
	log  " (EE) $1"
	exit 1
}

function info()
{
	echo " (II) $1"
	log  " (II) $1"
}

function silent()
{
	OUTPUT=`$*`
	if [ "$?" != "0" ]; then
	    echo $OUTPUT
	    die "$* failed!"
	else
	    log "$OUTPUT"
	fi
}

# Function to grab var from src
function getvar() {
  old=$(head -5 Makefile | grep "^$1")
  echo $(echo ${old/"$1 ="/} | sed -e "s/[ ]*\(.*\)[ ]*/\1/g")
  return 0
}

if [ ! -f "./.config" ]; then
	CURDIR=`pwd`
	die "No kernel .config exists in $CURDIR!"
fi

if [ ! -f "./Makefile" ]; then
	die "No Makefile present!"
fi

VERSION=`getvar VERSION`
PATCHLEVEL=`getvar PATCHLEVEL`
SUBLEVEL=`getvar SUBLEVEL`
EXTRAVERSION=`getvar EXTRAVERSION`

. ./.config

NAME="$VERSION.$PATCHLEVEL.$SUBLEVEL$EXTRAVERSION$CONFIG_LOCALVERSION"

info "Detected kernel version $NAME"

if [ $UID != "0" ]; then
	die "Must be root to install kernel!"
fi

# (1) copy modules
if [ "$1" != "-m" ]; then
	info "Installing modules..."
	silent make -j32 modules_install
else
	info "Skipping installing modules."
fi

# (2) copy kernel
info "Installing kernel..."
silent cp -v arch/sparc64/boot/image	/boot/vmlinuz-$NAME
silent cp -v System.map             	/boot/System.map-$NAME

# (3) build ramdisk
info "Building module dependencies"
silent depmod -v $NAME

ALREADY_LINKED=`ls /lib/firmware | grep "$NAME" `
if [ ! -z "$ALREADY_LINKED" ]; then
	info "Firmware library files already linked."
else
	info "Creating link to firmware library files..."
	silent ln -s /lib/firmware/2.6.22-14-sparc64-smp /lib/firmware/$NAME
fi

if [ "$1" != "-m" ]; then
	info "Building initial ramdisk..."
	silent update-initramfs -c -k $NAME
else
	info "Skipping updating initial ramdisk..."
fi

# (4) make bootloader entry
ALREADY_PRESENT=`grep "^image=/vmlinuz-${NAME}$" /boot/silo.conf `

if [ ! -z "$ALREADY_PRESENT" ]; then
	info "Bootloader entry appears to be already present."
else
	info "Creating bootloader entry..."
	cat >> /boot/silo.conf <<__EOE__

image=/vmlinuz-$NAME
	label=Kernel-$NAME
	initrd=/initrd.img-$NAME
	root=/dev/disk/by-uuid/4ebd4362-682e-4856-a467-086a3780179c
	partition=4
	append="quiet splash"
__EOE__

fi

info "Kernel $NAME has been installed."