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#!/bin/bash

# Copyright 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2015, 2016, 2017, 2018  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.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=mkinitrd
VERSION=${VERSION:-1.4.11}
BB=1.30.1
BUILD=${BUILD:-15}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i586 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}
TMP=${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 || tar xvf $CWD/busybox-$BB.tar.?z || exit 1
cd busybox-$BB || exit 1

if [ -d $CWD/fixes-$BB ]; then
  for pfile in $CWD/fixes-$BB/*.patch ; do 
    patch -p1 < $pfile || exit 1 
  done
fi

chown -R root:root .
sed -e \
  's#^CONFIG_PREFIX=.*#CONFIG_PREFIX="'$PKG'/usr/share/mkinitrd/initrd-tree"#' \
  $CWD/busybox-dot-config > .config
make oldconfig || exit 1
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 -a $CWD/mkinitrd_command_generator.sh $PKG/usr/share/mkinitrd
chown root:root $PKG/usr/share/mkinitrd/mkinitrd_command_generator.sh
chmod 755 $PKG/usr/share/mkinitrd/mkinitrd_command_generator.sh
cp -a $CWD/keymaps.tar.gz $PKG/usr/share/mkinitrd
chown root:root $PKG/usr/share/mkinitrd/keymaps.tar.gz
chmod 644 $PKG/usr/share/mkinitrd/keymaps.tar.gz

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

  # Patch init:
  zcat $CWD/0001-Fix-LUKSTRIM-with-C-T-and-UUID.patch.gz | patch -p1 --verbose || exit 1

  # These are useful for ARM:
  mknod -m 644 dev/random c 1 8
  mknod -m 644 dev/urandom c 1 9

  tar czf ../initrd-tree.tar.gz .
) || exit 1
rm -rf $PKG/usr/share/mkinitrd/initrd-tree

# Add busybox docs:
mkdir -p $PKG/usr/doc/busybox-$BB
cp -a AUTHORS COPYING* INSTALL LICENSE README* TODO* \
  $PKG/usr/doc/busybox-$BB
cp -a e2fsprogs/README $PKG/usr/doc/busybox-$BB/README.e2fsprogs
cp -a libbb/README $PKG/usr/doc/busybox-$BB/README.libbb
cp -a shell/README $PKG/usr/doc/busybox-$BB/README.shell
cp -a testsuite/README $PKG/usr/doc/busybox-$BB/README.testsuite

mkdir -p $PKG/sbin
cp -a $CWD/mkinitrd $PKG/sbin/mkinitrd
chown root:root $PKG/sbin/mkinitrd
chmod 755 $PKG/sbin/mkinitrd

# Patch to switch to mktemp:
( cd $PKG/sbin ; zcat $CWD/mkinitrd.tempfile.to.mktemp.patch.gz | patch --verbose || exit 1) || exit 1

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

mkdir -p $PKG/var/lib/pkgtools/setup
cp -a $CWD/setup.01.mkinitrd $PKG/var/lib/pkgtools/setup
chown root:root $PKG/var/lib/pkgtools/setup/setup.01.mkinitrd
chmod 755 $PKG/var/lib/pkgtools/setup/setup.01.mkinitrd

mkdir -p $PKG/usr/sbin
cp -a $CWD/geninitrd $PKG/usr/sbin
chown root:root $PKG/usr/sbin/geninitrd
chmod 755 $PKG/usr/sbin/geninitrd

mkdir -p $PKG/etc
cp -a $CWD/mkinitrd.conf.sample $PKG/etc/mkinitrd.conf.sample
# ARM systems often need more time to find devices:
case "$( uname -m )" in
  arm*) sed -e 's@#WAIT="1"@#WAIT="4"@g' \
    -i $PKG/etc/mkinitrd.conf.sample;;
esac
chown root:root $PKG/etc/mkinitrd.conf.sample
chmod 644 $PKG/etc/mkinitrd.conf.sample

mkdir -p $PKG/usr/doc/mkinitrd-$VERSION
sed $CWD/README.initrd \
  -e "s,@DATE@,$(date),g" \
  -e "s,@KERNEL_VERSION@,$(uname -r),g" \
  -e "s,@PACKAGE_VERSION@,$(uname -r | tr - _),g" \
  -e "s,@LILO_KERNEL_NAME@,$(echo $(uname -r) | tr -d . | tr -d - ),g" \
  -e "s,@MKINITRD_VERSION@,$VERSION,g" \
  -e "s,@ARCH@,$ARCH,g" \
  -e "s,@BUILD@,$BUILD,g" \
  > $PKG/usr/doc/mkinitrd-$VERSION/README.initrd

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