#!/bin/sh

# Slackware build script for vulkan-sdk

# Copyright 2016  Heinz Wiesinger, Amsterdam, The Netherlands
# Copyright 2016  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.

PKGNAM=vulkan-sdk
VERSION=${VERSION:-$(echo Vulkan-LoaderAndValidationLayers-sdk-*.tar.?z* | rev | cut -f 3- -d . | cut -f 1 -d - | rev)}
BUILD=${BUILD:-1}

NUMJOBS=${NUMJOBS:--j17}

# Automatically determine the architecture we're building on:
MARCH=$( uname -m )
if [ -z "$ARCH" ]; then
  case "$MARCH" in
    i?86)    export ARCH=i586 ;;
    armv7hl) export ARCH=$MARCH ;;
    arm*)    export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
    *)       export ARCH=$MARCH ;;
  esac
fi

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O3 -march=znver1 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

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

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf Vulkan-LoaderAndValidationLayers-sdk-$VERSION
tar xvf $CWD/Vulkan-LoaderAndValidationLayers-sdk-$VERSION.tar.?z* || exit 1
cd Vulkan-LoaderAndValidationLayers-sdk-$VERSION || exit 1

GLSLANG_VERSION=$(cat glslang_revision | head -n 1)
SPIRV_HEADERS_VERSION=$(cat spirv-headers_revision | head -n 1)
SPIRV_TOOLS_VERSION=$(cat spirv-tools_revision | head -n 1)

mkdir external

cd external
  tar xvf $CWD/glslang-${GLSLANG_VERSION}.tar.?z*
  mv glslang-${GLSLANG_VERSION} glslang
  tar xvf $CWD/SPIRV-Tools-${SPIRV_TOOLS_VERSION}.tar.?z*
  mv SPIRV-Tools-${SPIRV_TOOLS_VERSION} spirv-tools
cd -

cd external/spirv-tools/external
  tar xvf $CWD/SPIRV-Headers-${SPIRV_HEADERS_VERSION}.tar.?z*
  mv SPIRV-Headers-${SPIRV_HEADERS_VERSION} spirv-headers
cd -

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 {} \;

mkdir -p external/{glslang,spirv-tools}/build
mkdir -p build
mkdir -p demos/build

# Fix LIBDIRSUFFIX
for i in $(find external -name CMakeLists.txt); do
  sed -i "s|DESTINATION lib|DESTINATION lib\${LIB_SUFFIX}|" "$i"
done

cd external/glslang/build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DCMAKE_BUILD_TYPE=Release \
    ..

  make $NUMJOBS VERBOSE=1 || make || exit 1
  make install DESTDIR=$PKG || exit 1
cd -

cd external/spirv-tools/build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DLIB_SUFFIX=${LIBDIRSUFFIX} \
    -DCMAKE_BUILD_TYPE=Release \
    ..

  make $NUMJOBS VERBOSE=1 || make || exit 1
  make install DESTDIR=$PKG || exit 1
cd -

# python 2.7 is fine, unless we want to build the demos
sed -i "s|\<python3\>|python|" *.py */*.py CMakeLists.txt
sed -i "s|PythonInterp 3|PythonInterp 2|" CMakeLists.txt

cd build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_SYSCONFDIR=/etc \
    -DCMAKE_INSTALL_DATADIR=/share \
    -DCMAKE_SKIP_RPATH=True \
    -DBUILD_TESTS=Off \
    -DBUILD_DEMOS=Off \
    -DBUILD_WSI_XLIB_SUPPORT=On \
    -DCMAKE_BUILD_TYPE=Release \
    -DGLSLANG_LIB=../external/glslang/build/glslang/libglslang.a \
    -DGLSLANG_VALIDATOR=../external/glslang/build/StandAlone/glslangValidator \
    -DHLSL_LIB=../external/glslang/build/hlsl/libHLSL.a \
    -DOGLCompiler_LIB=../external/glslang/build/OGLCompilersDLL/libOGLCompiler.a \
    -DOSDependent_LIB=../external/glslang/build/glslang/OSDependent/Unix/libOSDependent.a \
    -DSPIRV_LIB=../external/glslang/build/SPIRV/libSPIRV.a \
    -DSPIRV_REMAPPER_LIB=../external/glslang/build/SPIRV/libSPVRemapper.a \
    ..

  make $NUMJOBS VERBOSE=1 || make || exit 1
cd -

cd demos/build
  cmake \
    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS -I../../include/" \
    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS -I../../include/" \
    -DCMAKE_EXE_LINKER_FLAGS="-L../../build/loader/" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_SYSCONFDIR=/etc \
    -DCMAKE_INSTALL_DATADIR=/share \
    ..

  make $NUMJOBS VERBOSE=1 vulkaninfo || make vulkaninfo || exit 1
cd -

# Manual install...

mkdir -p $PKG/usr/{bin,lib$LIBDIRSUFFIX,include/vulkan,include/spirv}
mkdir -p $PKG/usr/share/vulkan/{explicit,implicit}_layer.d
mkdir -p $PKG/etc/vulkan/icd.d/

install -m 0644 include/vulkan/* $PKG/usr/include/vulkan/
for i in spirv.h spirv.hpp spirv.hpp11; do
  install -m 0644 external/spirv-tools/external/spirv-headers/include/spirv/1.1/$i \
    $PKG/usr/include/spirv/
done

cp -rv  build/loader/libvulkan.so* $PKG/usr/lib$LIBDIRSUFFIX/
install -m 0644 build/layers/*.so $PKG/usr/lib$LIBDIRSUFFIX/

install -m 0755 demos/build/vulkaninfo $PKG/usr/bin/

# fix library paths
for i in layers/linux/*.json ; do
  sed 's@./@@' $i > $PKG/usr/share/vulkan/explicit_layer.d/$(basename $i)
done

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a *.md LICENSE.txt loader/LoaderAndLayerInterface.md \
  $PKG/usr/doc/$PKGNAM-$VERSION

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

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