#!/bin/bash

# mkinitd.SlackBuild
# Heavily based on the original Slackware build scripts,
# Modified by Stuart Winter <mozes@slackware.com>
# 21-Nov-2004
#
# Copyright 2007, 2008, 2009  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.

# Record toolchain & other info for the build log:
slackbuildinfo

# Busy box version (will need updating):
BB=1.15.3

# Paths to skeleton port's source & real Slackware source tree:
export CWD=$SLACKSOURCE/$PKGSERIES/$PKGNAM
export PORTCWD=$PWD

# Temporary build locations:
export TMPBUILD=$TMP/build-$PKGNAM
export PKG=$TMP/package-$PKGNAM
mkpkgdirs # Delete & re-create temporary directories then cd into $TMPBUILD

# Determine the CFLAGS for the known architectures:
case $ARCH in
   arm)     export SLKCFLAGS="-march=armv4t" ;;
   *)       export SLKCFLAGS="" ;;
esac

# 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

##### Build busybox #############################################

# Extract source:
tar xvvf $CWD/busybox-$BB.tar.bz2
cd busybox-* || exit 1
slackhousekeeping

# Fix ARM build problem:
# http://osdir.com/ml/linux-kernel/2009-06/msg09557.html
patch -p0 --verbose < $PORTCWD/sources/armfix.diff || exit 1

# Configure:
sed -e \
  's#^CONFIG_PREFIX=.*#CONFIG_PREFIX="'$PKG'/usr/share/mkinitrd/initrd-tree"#' \
  $CWD/busybox-dot-config > .config
make oldconfig

# Build:
make $NUMJOBS || failmake

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

# Add a poor-man's reboot into the initrd.
# This is because if there is a problem and your initrd can't mount
# the filesystems, then 'reboot' won't work; and most terminal emulators
# disconnect when you power cycle the device, which may cause you to miss
# being able to interrupt the boot sequence.
mkdir -vpm755 $PKG/sbin
echo 'echo b > /proc/sysrq-trigger' > $PKG/sbin/freboot
chmod 755 $PKG/sbin/freboot

# 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

  # Add Slackware ARM stuff:
  mknod -m 644 dev/random c 1 8
  mknod -m 644 dev/urandom c 1 9

  # Archive it:
  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}
install -vpm644 $CWD/mkinitrd.8 $PKG/usr/man/man8/
install -vpm644 $CWD/mkinitrd.conf.5 $PKG/usr/man/man5/

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}
)

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

# Replace the readme with the ARM version:
install -vpm644 $PORTCWD/README.initrd.arm $PKG/usr/doc/mkinitrd-$VERSION/README.initrd

###################################################################

# If necessary, start the fakeroot server so we can set file/dir ownerships:
start_fakeroot

# Apply generic Slackware packaging policies:
cd $PKG
slackstripall   # strip all .a archives and all ELFs
slackgzpages -i # compress man & info pages and delete usr/info/dir
slackslack      # chown -R root:root, chmod -R og-w, slackchown, slack644docs
slackdesc       # install slack-desc and doinst.sh
slackmp         # run makepkg -l y -c n

# Perform any final checks on the package:
cd $PKG
slackhlinks     # search for any hard links