#!/bin/bash

# Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2021  Patrick J. Volkerding, Sebeka, Minnesota, 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.

# Modified by Matteo Bernardini <ponce@slackbuilds.org> (2014)
# Modified for LXC 4.0.x by Matthew Chamley <mcgchamley@yahoo.co.uk> (2021)

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

PKGNAM=lxc
VERSION=${VERSION:-$(echo $PKGNAM-*.tar.?z* | rev | cut -f 3- -d . | rev | cut -f 2- -d -)}
BUILD=${BUILD:-1}

# 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-$(echo $VERSION | tr - _)-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
rm -rf $PKGNAM-$VERSION
tar xvf $CWD/$PKGNAM-$VERSION.tar.?z* || exit 1
cd $PKGNAM-$VERSION

chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+

# Configure, build, and install:
export CFLAGS="$SLKCFLAGS"
export CXXFLAGS="$SLKCFLAGS"
mkdir meson-build
cd meson-build
meson setup \
  --prefix=/usr \
  --libdir=lib${LIBDIRSUFFIX} \
  --libexecdir=/usr/libexec \
  --bindir=/usr/bin \
  --sbindir=/usr/sbin \
  --includedir=/usr/include \
  --datadir=/usr/share \
  --mandir=/usr/man \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --buildtype=release \
  -Ddoc-path=/usr/doc/$PKGNAM-$VERSION \
  -Dglobal-config-path=/etc/lxc \
  -Drootfs-mount-path=/var/lib/rootfs-lxc \
  -Dapparmor=false \
  -Dpam-cgroup=true \
  -Dinit-script=sysvinit \
  .. || exit 1
  "${NINJA:=ninja}" $NUMJOBS || exit 1
  DESTDIR=$PKG $NINJA install || exit 1
cd ..

# The PAM module gets installed in the wrong location and there's no config
# option to put it in the right place, so we'll do it ourselves:
mkdir -p $PKG/lib${LIBDIRSUFFIX}
mv $PKG/usr/lib${LIBDIRSUFFIX}/security $PKG/lib${LIBDIRSUFFIX}

# Add the template file:
cat $CWD/lxc-slackware.in > $PKG/usr/share/lxc/templates/lxc-slackware
chmod 755 $PKG/usr/share/lxc/templates/lxc-slackware

# Make the default configuration directories and an empty rootfs folder:
mkdir -p $PKG/var/lib/lxc $PKG/etc/lxc $PKG/var/lib/rootfs-lxc $PKG/var/lib/misc

# Create a sample default configuration file:
echo "lxcpath = /var/lib/lxc" > $PKG/etc/lxc/lxc.conf.sample

# Move the other config files to .new:
mv $PKG/etc/lxc/default.conf $PKG/etc/lxc/default.conf.new
mv $PKG/etc/default/lxc $PKG/etc/default/lxc.new

# Install an init script (non executable by default):
install -D -m 0644 $CWD/rc.lxc $PKG/etc/rc.d/rc.lxc.new

# Remove init scripts that we do not use:
rm -r $PKG/etc/init.d

# --disable-static
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/lib*.a

# Strip binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION
cp -a \
  AUTHORS* CODING_STYLE* CONTRIBUTING* COPYING* LICENSE* MAINTAINERS* README* \
  doc/FAQ.txt \
  $PKG/usr/doc/${PKGNAM}-$VERSION

mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION/examples
cp -a doc/examples/*.conf $PKG/usr/doc/${PKGNAM}-$VERSION/examples

# Fix up man pages to stop 'man' from barfing a warning:
( cd $PKG/usr/man
  grep -F -lr -- '-*- coding: us-ascii -*-' . | xargs sed -i '/-*- coding: us-ascii -*-/d' )

# Compress and if needed symlink the man pages:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

# Remove empty documentation files:
find $PKG/usr/doc/${PKGNAM}-${VERSION} -size 0 -exec rm "{}" \;

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$(echo $VERSION | tr - _)-$ARCH-$BUILD.txz