#!/bin/bash

# Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2015, 2016, 2017, 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.

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

PKGNAM=imagemagick
BUILD=${BUILD:-1}

# NOTE:  This is to cope with ImageMagick version numbers such as 5.4.7-4,
# which occur fairly often (but not always).  If these numbers are all the same,
# then this is not one of those versions.

# This is a bit messy, so we'll explain it well.  :-)

# This is the version number used in the source tarball filename
FILEVER=$(echo ImageMagick-*.tar.?z | cut -f 2- -d - | rev | cut -f 3- -d . | rev)

# This is the base version number, which is needed to cd into the source tree.
# Normally this is the same as $FILEVER, but allow setting it here if needed.
BASEVER=$FILEVER

# This is the version number used in the package, where a version number cannot
# contain a '-'.  We'll try to autogenerate this one.
PKGVER=$(echo $FILEVER | tr - _)

# 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-$PKGVER-$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-imagemagick
rm -rf $PKG
mkdir -p $TMP $PKG

# --with-x or not --with-x, that is the question.  It seems many other
# distributions don't compile with X support, but it's been traditional
# here.  I am moving the prefix to /usr (instead of /usr/X11R6) though,
# because many X-linked things are put into /usr now (like GNOME), and
# I've heard a few reports of compile failures when this isn't in /usr.
# Everyone else does it -- time to follow the path of least resistance.

cd $TMP
rm -rf ImageMagick-$BASEVER
tar xvf $CWD/ImageMagick-$FILEVER.tar.?z || exit 1
cd ImageMagick-$BASEVER || exit 1

# Harden the default settings in policy.xml to prevent security issues:
zcat $CWD/policy.xml.diff.gz | patch -p1 --verbose || exit 1

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 {} \;

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --sysconfdir=/etc \
  --program-prefix= \
  --with-x \
  --with-frozenpaths=no \
  --with-modules \
  --disable-opencl \
  --enable-hdri \
  --enable-static=no \
  --enable-shared \
  --with-gcc-arch=$ARCH \
  --with-perl \
  --with-perl-options="INSTALLDIRS=vendor" \
  --with-rsvg \
  --build=$ARCH-slackware-linux || exit 1

make $NUMJOBS || make || exit 1
# First, spam the running development system, as ImageMagick is unable to
# properly link the utilities against a new shared library major version
# otherwise which has led to several broken packages over the years:
make install || exit 1
rm -f /usr/lib${LIBDIRSUFFIX}/libMagick*.la
/sbin/ldconfig

# Now build again against the new libraries and headers:
make clean
make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

# This should certainly not be included.
# It stomps on the libtool package.
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/libltdl.*

# .la files in /usr/lib${LIBDIRSUFFIX}/ should be removed.
# Other .la files should be left alone, as ImageMagick uses them internally
# to locate modules.
rm -f $PKG/usr/lib${LIBDIRSUFFIX}/*.la

( cd $PKG
  # Nothing but a perl upgrade should replace this (and maybe not even that)
  find . -name perllocal.pod | xargs rm -f
)

# DESTDIR is still broken about this, but works well enough otherwise:
chmod 644 $PKG/usr/share/man/man3/*
mv $PKG/usr/share/man/man3 $PKG/usr/man
rmdir $PKG/usr/share/man

( cd $PKG/usr/lib${LIBDIRSUFFIX}/perl5
  # Ditch empty dirs:
  rmdir */* 2> /dev/null
  rmdir * 2> /dev/null
)

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

# Remove rpaths:
for file in $(find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF | cut -f 1 -d : 2> /dev/null) ; do
  if [ ! "$(patchelf --print-rpath $file 2> /dev/null)" = "" ]; then
    patchelf --remove-rpath $file
  fi
done

# Compress and link manpages, if any:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1 | grep -v '\.gz$') ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Move config files to .new:
( cd $PKG/etc/ImageMagick*
  for file in * ; do
    mv ${file} ${file}.new
  done
)

mkdir -p $PKG/usr
mv $PKG/usr/share/doc $PKG/usr
cp -a \
  AUTHORS LICENSE NEWS NOTICE Platforms.txt QuickStart.txt README.txt \
  $PKG/usr/doc/Imag*

# 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/ImageMagick-*)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

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

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