#!/bin/bash

# Changed to deal with the demise of bitkeeper
base=`findlatestkernel | sed -e 's/^.*\/linux-//' -e 's/.tar.gz//'`

echo "Checking for linux-$base (kernel.org)"
if [ ! -d linux-$base ]
then
  wget -c http://www.kernel.org/pub/linux/kernel/v2.6/linux-$base.tar.bz2
  tar --bzip2 -xf linux-$base.tar.bz2
fi

echo "Checking for linux-$base (kernel.org release candidates)"
if [ ! -d linux-$base ]
then
  wget -c http://www.kernel.org/pub/linux/kernel/v2.6/testing/linux-$base.tar.bz2
  tar --bzip2 -xf linux-$base.tar.bz2
fi

echo "Checking for linux-$base (final check)"
if [ ! -d linux-$base ]
then
  echo "Failed to get the base"
  exit 2
fi

echo linux-$base > latest

# And now the mm cset
mmpatch=`wget http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/$base/ -O - | grep mm | tail -1 | sed -e 's/^.*<a href=".*">//' -e 's/\/<\/a>.*$//'`
rm $mmpatch
wget http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/$base/$mmpatch/$mmpatch.bz2
bunzip2 $mmpatch.bz2

if [ -d linux-$mmpatch ]
then
  echo "We already have the latest mm cset"
else
  echo "Building latest mm cset"
  cp -R linux-$base linux-$mmpatch
  pwd=`pwd`
  cd linux-$mmpatch
  patch -p 1 < $pwd/$mmpatch
  cd $pwd

  echo linux-$mmpatch > latestmm
fi