#!/bin/sh

# Copyright 2005-2011, 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.


VERSION_NEW=1.4.22
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 [ "$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

build_source() {

cd $TMP
rm -rf libpng-$VERSION
tar xvf $CWD/libpng-$VERSION.tar.?z* || 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 {} \;

# Look like using ./configure is the only way that works now...
./configure --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man

make -j4 prefix=/usr LIBPATH=/usr/lib${LIBDIRSUFFIX} ZLIBLIB="-L/usr/lib${LIBDIRSUFFIX} -lm -lz" || exit 1
make install prefix=/usr LIBPATH=/usr/lib${LIBDIRSUFFIX} ZLIBLIB="-L/usr/lib${LIBDIRSUFFIX} -lm -lz" DESTDIR=$PKG

# Don't package these:
rm $PKG/usr/lib${LIBDIRSUFFIX}/*.{a,la}

# I'm ditching this to see if anyone cares.
#
## 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
#)

# Well, glad I got rid of the above, but <someone> upstream still does not
# grok shared libraries on Linux it seems -- libpng-1.4.0 caused all the
# newly compiled binaries to want libpng.so.14, and now libpng-1.4.1
# wants to change that to libpng14.so.14.  Searching online finds that
# we are not the only ones with binaries that want libpng.so.14, so we
# are forced to provide a compatibility symlink again...  :-/
#
# We'll try to remove this in 5 to 10 years, just like before.
( cd $PKG/usr/lib${LIBDIRSUFFIX}
  if [ ! -e libpng.so.14 -a -e libpng14.so.14 ]; then
    ln -sf libpng14.so.14 libpng.so.14
  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 --force $PKG/usr/man/man?/*.?
rm -rf $PKG/usr/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

# 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 $PKG/usr/doc/libpng-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

}

# Build the 1.4 version:
VERSION=$VERSION_NEW
build_source

# Default the includes to version 1.4.x:
#( cd $PKG/usr/include ; ln -sf libpng14 libpng )

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

cd $PKG
/sbin/makepkg -l y -c n $TMP/libpng14-$VERSION-$ARCH-$BUILD.txz