#!/bin/sh

# Copyright 2007, 2008, 2009, 2010  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


VERSION=${VERSION:-1.4.5}
BB=1.15.3
NUMJOBS=${NUMJOBS:--j7}
BUILD=${BUILD:-2}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-mkinitrd

# Write a warning to stdout if the mkinitrd script has a different version:
eval $( grep "^MKINITRD_VERSION=" $CWD/mkinitrd )
if [ "$VERSION" != "$MKINITRD_VERSION" ]; then
  echo "The version of this package ($VERSION) is not equal to the version of the mkinitrd script ($MKINITRD_VERSION)."
  sleep 5
fi

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf busybox-$BB
tar xvf $CWD/busybox-$BB.tar.bz2 || exit 1
cd busybox-$BB

#zcat $CWD/busybox-${BB}.remove_warning.diff.gz | patch -p1 --verbose || exit 1
#zcat $CWD/busybox-${BB}.no-gc-sections.diff.gz | patch -p1 --verbose || exit 1
# Needed with 2.6.27 kernel:
#zcat $CWD/busybox-1.12.1_inotify.diff.gz | patch -p1 --verbose || exit 1

chown -R root:root .
sed -e \
  's#^CONFIG_PREFIX=.*#CONFIG_PREFIX="'$PKG'/usr/share/mkinitrd/initrd-tree"#' \
  $CWD/busybox-dot-config > .config
make oldconfig
make $NUMJOBS || make || exit 1

mkdir -p $PKG/usr/share/mkinitrd/initrd-tree/{bin,sbin}
make install || exit 1
rm -f $PKG/usr/share/mkinitrd/initrd-tree/linuxrc

# Copying additional files:
cp $CWD/mkinitrd_command_generator.sh $PKG/usr/share/mkinitrd
chmod 755 $PKG/usr/share/mkinitrd/mkinitrd_command_generator.sh
cp $CWD/keymaps.tar.gz $PKG/usr/share/mkinitrd

# Zip up the initrd-tree:
( cd $PKG/usr/share/mkinitrd/initrd-tree
  tar xf $CWD/_initrd-tree.tar.gz
  cat $CWD/init > init
  tar czf ../initrd-tree.tar.gz .
)
rm -rf $PKG/usr/share/mkinitrd/initrd-tree

# Add busybox docs:
mkdir -p $PKG/usr/doc/busybox-$BB
cp -a AUTHORS INSTALL LICENSE README \
  $PKG/usr/doc/busybox-$BB

mkdir -p $PKG/sbin
cat $CWD/mkinitrd > $PKG/sbin/mkinitrd
chmod 755 $PKG/sbin/mkinitrd

mkdir -p $PKG/usr/man/man{5,8}
cat $CWD/mkinitrd.8 | gzip -9c > $PKG/usr/man/man8/mkinitrd.8.gz
cat $CWD/mkinitrd.conf.5 | gzip -9c > $PKG/usr/man/man5/mkinitrd.conf.5.gz

mkdir -p $PKG/etc
cat $CWD/mkinitrd.conf.sample > $PKG/etc/mkinitrd.conf.sample

mkdir -p $PKG/usr/doc/mkinitrd-$VERSION
cp -a $CWD/README.initrd $PKG/usr/doc/mkinitrd-$VERSION

( cd $PKG/usr/doc/mkinitrd-$VERSION
  DATE="$(date)"
  KERNEL_VERSION="$(uname -r)"
  PACKAGE_VERSION="$(uname -r | tr - _)"
  LILO_KERNEL_NAME="$(echo $(uname -r) | tr -d . | tr -d - )"
  cat README.initrd | sed -e s/@DATE@/"$DATE"/ > README.initrd1
  cat README.initrd1 | sed -e s/@KERNEL_VERSION@/"$KERNEL_VERSION"/ > README.initrd2
  cat README.initrd2 | sed -e s/@PACKAGE_VERSION@/"$PACKAGE_VERSION"/ > README.initrd3
  cat README.initrd3 | sed -e s/@LILO_KERNEL_NAME@/"$LILO_KERNEL_NAME"/ > README.initrd4
  cat README.initrd4 | sed -e s/@MKINITRD_VERSION@/"$VERSION"/ > README.initrd5
  cat README.initrd5 | sed -e s/@ARCH@/"$ARCH"/ > README.initrd6
  cat README.initrd6 | sed -e s/@BUILD@/"$BUILD"/ > README.initrd
  rm -f README.initrd{1,2,3,4,5,6}
)
chmod 644 $PKG/usr/doc/mkinitrd-$VERSION/*
chown root:root $PKG/usr/doc/mkinitrd-$VERSION/*

mkdir $PKG/boot
( cd $PKG/boot
  ln -sf /usr/doc/mkinitrd-$VERSION/README.initrd .
)

find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $TMP/mkinitrd-$VERSION-$ARCH-$BUILD.txz