#!/bin/sh

# Copyright 2008, 2009, 2013  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=${VERSION:-6b}
BUILD=${BUILD:-6_slack13.0}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$(uname -m)" in
    i?86) ARCH=i486 ;;
    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7lh ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *) ARCH=$(uname -m) ;;
  esac
  export ARCH
fi

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

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
fi

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

# Explode the package framework:
cd $PKG
explodepkg $CWD/_libjpeg.tar.gz
if [ "$ARCH" = "x86_64" ]; then
  mv usr/lib usr/lib${LIBDIRSUFFIX}
  sed -i -e "s#usr/lib#usr/lib${LIBDIRSUFFIX}#g" install/doinst.sh
fi

cd $TMP
rm -rf jpeg-6b
tar xzvf $CWD/jpegsrc.v6b.tar.gz
cd jpeg-6b
chown -R root:root .
zcat $CWD/jpeg-6b.diff.gz | patch -p0 -E
zcat $CWD/jpeg.CVE-2013-6629.diff.gz | patch -p1 --verbose || exit 1
export CFLAGS="$SLKCFLAGS"
./configure \
  --libdir=/usr/lib${LIBDIRSUFFIX}
make -j3 || exit 1
strip cjpeg djpeg rdjpgcom wrjpgcom jpegtran
cat cjpeg > $PKG/usr/bin/cjpeg
cat djpeg > $PKG/usr/bin/djpeg
cat jpegtran > $PKG/usr/bin/jpegtran
cat rdjpgcom > $PKG/usr/bin/rdjpgcom
cat wrjpgcom > $PKG/usr/bin/wrjpgcom
for page in cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 wrjpgcom.1 ; do
  cat $page | gzip -9c > $PKG/usr/man/man1/$page.gz
done
strip --strip-unneeded libjpeg.so.62.0.0
cat libjpeg.so.62.0.0 > $PKG/usr/lib${LIBDIRSUFFIX}/libjpeg.so.62.0.0
cat libjpeg.a > $PKG/usr/lib${LIBDIRSUFFIX}/libjpeg.a
cp -a jconfig.h jpeglib.h jmorecfg.h jerror.h $PKG/usr/include
# KDE includes this complete header list, but the libjpeg source doesn't
# suggest it, and we trust them. :)
#for file in jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h \
#  jmorecfg.h jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h jconfig.h ; do
#  cp -a $file $PKG/usr/include
#done
mkdir -p $PKG/usr/doc/libjpeg-$VERSION
cp -a README *.doc $PKG/usr/doc/libjpeg-$VERSION
chmod 644 $PKG/usr/doc/libjpeg-$VERSION/*
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

# Build the package:
cd $PKG
makepkg -c y -l y $TMP/libjpeg-$VERSION-$ARCH-$BUILD.txz