#!/bin/bash

# Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020  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)

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

if pkg-config --exists libseccomp; then SECCOMP="en"; else SECCOMP="dis"; 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 {} \;

# Upstream switched to distrobuilder but it seems overkill for our needs
# so we patch the builds system to support our old-style templates
# (this is still supported also upstream)
patch -p1 < $CWD/files/add_slackware_templates.patch

# Add the template files:
cat $CWD/files/lxc-slackware.in > templates/lxc-slackware.in
cat $CWD/files/slackware.common.conf.in > config/templates/slackware.common.conf.in
cat $CWD/files/slackware.userns.conf.in > config/templates/slackware.userns.conf.in

NOCONFIGURE=1 ./autogen.sh

# Configure:
# lua is autodetected
CFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --sysconfdir=/etc \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PKGNAM-$VERSION \
  --infodir=/usr/info \
  --with-global-conf=/etc/lxc/lxc.conf \
  --with-rootfs-path=/var/lib/rootfs-lxc \
  --${SECCOMP}able-seccomp \
  --enable-capabilities \
  --disable-werror \
  --disable-apparmor \
  --disable-static \
  --with-distro=slackware \
  --build=$ARCH-slackware-linux || exit 1

# Build and install:
make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# Don't ship .la files:
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/*.la

# Add the modified Slackware startup scripts:
mkdir -p $PKG/usr/share/lxc/scripts/slackware
cp -a $CWD/scripts/*.lxc $PKG/usr/share/lxc/scripts/slackware
chown root:root $PKG/usr/share/lxc/scripts/slackware/*
chmod 644 $PKG/usr/share/lxc/scripts/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

# Create a sample default configuration file:
echo "lxc.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/files/rc.lxc $PKG/etc/rc.d/rc.lxc.new

# Put bash completion file in system directory:
mkdir -p $PKG/usr/share/bash-completion/completions/
mv $PKG/etc/bash_completion.d/lxc \
   $PKG/usr/share/bash-completion/completions/lxc
rmdir --parents $PKG/etc/bash_completion.d 2>/dev/null
# Replace illegal characters in the bash completion file:
sed -i "s/lxc-generic-/lxc_generic_/g" $PKG/usr/share/bash-completion/completions/lxc

# 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 CONTRIBUTING COPYING* INSTALL MAINTAINERS NEWS README* \
  doc/FAQ.txt $CWD/README.SLACKWARE \
  $PKG/usr/doc/${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
  fgrep -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

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

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