#!/bin/bash

# Prepare updated Kernel config files & recompress the Kernel source
# for maximum compression:

CWD=$PWD

#xz -vd linux-*tar.xz || exit 1

rm -rf srcunpack
mkdir srcunpack
( cd srcunpack
  # Back these up incase:
  cp -fa $CWD/../configs .
  tar xf $CWD/linux-*.tar
  cd linux-* || exit 1
  # The Kernel archive version doesn't necessarily match the version
  # exported by the Kernel itself:
  echo "Kernel version: $( sed -ne's/^VERSION *= *//p' Makefile).$(sed -ne's/^PATCHLEVEL *= *//p' Makefile).$(sed -ne's/^SUBLEVEL *= *//p' Makefile )"
  read -p "Press ENTER"

  for i in $CWD/../configs/config* ; do 
    echo "***** $i *****"
    cp -fav $i .config
    make ARCH=arm oldconfig || exit 1
    cp -fav .config $i
  done ) || exit 1

# Repack with LZMA and extreme compression (kernel.org doesn't use 
# extreme compression):
cd $CWD
echo "Repacking Linux source - will take some time.."
xz -vvez9 linux*.tar
echo "You can now wipe srcunpack .."