#!/bin/bash

# Slackware build script for embree

# Copyright 2006-2014  Robby Workman, Northport, AL, 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.

PRGNAM=embree
VERSION=${VERSION:-3.12.1}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.?z*
cd $PRGNAM-$VERSION

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

#EMBREE_API_NAMESPACE:STRING=
#EMBREE_BACKFACE_CULLING:BOOL=OFF
#EMBREE_COMPACT_POLYS:BOOL=OFF
#EMBREE_CURVE_SELF_INTERSECTION_AVOIDANCE_FACTOR:STRING=2.0
#EMBREE_FILTER_FUNCTION:BOOL=ON
#EMBREE_GEOMETRY_CURVE:BOOL=ON
#EMBREE_GEOMETRY_GRID:BOOL=ON
#EMBREE_GEOMETRY_INSTANCE:BOOL=ON
#EMBREE_GEOMETRY_POINT:BOOL=ON
#EMBREE_GEOMETRY_QUAD:BOOL=ON
#EMBREE_GEOMETRY_SUBDIVISION:BOOL=ON
#EMBREE_GEOMETRY_TRIANGLE:BOOL=ON
#EMBREE_GEOMETRY_USER:BOOL=ON
#EMBREE_IGNORE_CMAKE_CXX_FLAGS:BOOL=ON
#EMBREE_IGNORE_INVALID_RAYS:BOOL=OFF
#EMBREE_INSTALL_DEPENDENCIES:BOOL=OFF
#EMBREE_ISA_AVX:BOOL=ON
#EMBREE_ISA_AVX2:BOOL=ON
#EMBREE_ISA_AVX512KNL:BOOL=OFF
#EMBREE_ISA_AVX512SKX:BOOL=ON
#EMBREE_ISA_SSE2:BOOL=ON
#EMBREE_ISA_SSE42:BOOL=ON
#EMBREE_ISPC_EXECUTABLE:FILEPATH=EMBREE_ISPC_EXECUTABLE-NOTFOUND
#EMBREE_ISPC_SUPPORT:BOOL=ON
#EMBREE_LIBRARY_NAME:STRING=embree3
#EMBREE_MAX_INSTANCE_LEVEL_COUNT:STRING=1
#EMBREE_MAX_ISA:STRING=NONE
#EMBREE_MIN_WIDTH:BOOL=OFF
#EMBREE_RAY_MASK:BOOL=OFF
#EMBREE_RAY_PACKETS:BOOL=ON
#EMBREE_STACK_PROTECTOR:BOOL=OFF
#EMBREE_STATIC_LIB:BOOL=OFF
#EMBREE_STAT_COUNTERS:BOOL=OFF
#EMBREE_TASKING_SYSTEM:STRING=TBB
#EMBREE_TUTORIALS:BOOL=ON
#EMBREE_ZIP_MODE:BOOL=OFF

mkdir -p build
cd build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_MANDIR=/usr/man \
    -DCMAKE_INSTALL_DOCDIR=/usr/doc \
    -DEMBREE_ISPC_SUPPORT=OFF \
    -DEMBREE_TASKING_SYSTEM=OFF \
    -DEMBREE_TUTORIALS=OFF \
    -DCMAKE_BUILD_TYPE=Release ..
  make VERBOSE=1
  make install DESTDIR=$PKG
cd ..

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

find $PKG/usr/man -type f -exec gzip -9 {} \;
for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  third-party-programs-TBB.txt third-party-programs.txt readme.pdf README.md LICENSE.txt CHANGELOG.md doc/* \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
find $PKG/usr/doc -name "Makefile*" -exec rm {} \;
find $PKG/usr/doc -type f -exec chmod 644 {} \;

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

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}