#!/bin/sh

# Copyright 2005-2009  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.


VERSION=1.2.37
ARCH=${ARCH:-i486}
BUILD=${BUILD:-1}

if [ "$ARCH" = "x86_64" ]; then
  LIBDIRSUFFIX="64"
else
  LIBDIRSUFFIX=""
fi

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-libpng
rm -rf $PKG
mkdir -p $TMP $PKG/usr

cd $TMP
rm -rf libpng-$VERSION
tar xjvf $CWD/libpng-$VERSION.tar.bz2 || exit 1
cd libpng-$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 {} \;

# Might as well link to -lz -lm, since the ./configure seems
# to be doing it that way now...  finally.  That'll prevent
# a couple of emails a week.  :-)
zcat $CWD/libpng.libs.diff.gz | patch -p1 --verbose || exit 1

# Need this to substitute macros, but we'll keep using the
# pre-built Makefile for now anyway...
./configure --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX}

# Link the custom makefile:
ln -sf scripts/makefile.linux ./Makefile

make -j4 prefix=/usr LIBPATH=/usr/lib${LIBDIRSUFFIX} || exit 1
make install prefix=/usr LIBPATH=/usr/lib${LIBDIRSUFFIX} DESTDIR=$PKG

# This symlink is needed to keep old applications running:
# I guess the real lib used the major number 3, then 0 for
# a short while, and now .3 again.  Hopefully it will stay
# this way as it was .3 in Slackware 10.2.  One can hope.
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  if [ ! -e libpng.so.0 -a -e libpng.so.3 ]; then
    ln -sf libpng.so.3 libpng.so.0
  fi
)

find $PKG | xargs file | grep -e "executable" -e "shared object" \
  | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

gzip -9 $PKG/usr/man/man?/*

mkdir -p $PKG/usr/doc/libpng-$VERSION
cp -a \
  ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
  libpng*.txt example.c \
  $PKG/usr/doc/libpng-$VERSION

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/libpng-$VERSION-$ARCH-$BUILD.txz