#!/bin/bash

# Slackware build script for vulkan-sdk

# Copyright 2016, 2017, 2018, 2020, 2021  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=glslang
# The ./VERSION file is created by ./fetch-sources.sh:
VERSION=${VERSION:-$(cat VERSION)}
BUILD=${BUILD:-2_slack14.2}

# 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 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-$VERSION-$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 [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "armv7hl" ]; then
  SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "arm" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "mips" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "mipsel" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "ppc" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "sh4" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "or1k" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
elif [ "$ARCH" = "sparc" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
  CMAKE_EXTRA=" -DCMAKE_EXE_LINKER_FLAGS=-latomic"
else
  SLKCFLAGS=${SLKCFLAGS:-"-O2"}
  LIBDIRSUFFIX=${LIBDIRSUFFIX:-""}
  CMAKE_EXTRA=${CMAKE_EXTRA:-""}
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-vulkan-sdk

GLSLANG_VERSION=$(echo glslang-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
SPIRV_HEADERS_VERSION=$(echo SPIRV-Headers-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
SPIRV_TOOLS_VERSION=$(echo SPIRV-Tools-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKAN_HEADERS_VERSION=$(echo Vulkan-Headers-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKAN_LOADER_VERSION=$(echo Vulkan-Loader-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKAN_VALIDATIONLAYERS_VERSION=$(echo Vulkan-ValidationLayers-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
ROBIN_HOOD_VERSION=$(echo robin-hood-hashing-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKAN_EXTENSIONLAYER_VERSION=$(echo Vulkan-ExtensionLayer-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKAN_TOOLS_VERSION=$(echo Vulkan-Tools-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
VULKANTOOLS_VERSION=$(echo VulkanTools-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
SHADERC_VERSION=$(echo shaderc-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
SPIRV_CROSS_VERSION=$(echo SPIRV-Cross-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
GFXRECONSTRUCT_VERSION=$(echo gfxreconstruct-sdk-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
DXC_VERSION=$(echo DirectXShaderCompiler-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)
SPIRV_REFLECT_VERSION=$(echo SPIRV-Reflect-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d - | rev)

# upstream builder order:
# - SPIRV-Headers
# - glslang
# - Vulkan-Headers
# - Vulkan-Loader
# - Vulkan-ValidationLayers
# - Vulkan-ExtensionLayer
# - Vulkan-Tools
# - VulkanTools
# - shaderc
# - SPIRV-Cross
# - gfxreconstruct
# - DirectXShaderCompiler
# - SPIRV-Reflect

rm -rf $PKG
mkdir -p $TMP $PKG

cd $TMP
# Clear existing tmp sources:
rm -rf SPIRV-Headers-$SPIRV_HEADERS_VERSION \
  glslang-${GLSLANG_VERSION} \
  Vulkan-Headers-sdk-$VULKAN_HEADERS_VERSION \
  Vulkan-Loader-sdk-$VULKAN_LOADER_VERSION \
  Vulkan-ValidationLayers-sdk-$VULKAN_VALIDATIONLAYERS_VERSION \
  Vulkan-ExtensionLayer-sdk-$VULKAN_EXTENSIONLAYER_VERSION \
  Vulkan-Tools-sdk-$VULKAN_TOOLS_VERSION \
  VulkanTools-sdk-$VULKANTOOLS_VERSION \
  shaderc-$SHADERC_VERSION \
  SPIRV-Cross-$SPIRV_CROSS_VERSION \
  gfxreconstruct-sdk-$GFXRECONSTRUCT_VERSION \
  DirectXShaderCompiler-$DXC_VERSION \
  SPIRV-Reflect-$SPIRV_REFLECT_VERSION

cd $TMP
tar xvf $CWD/glslang-${GLSLANG_VERSION}.tar.?z || exit 1
cd glslang-$GLSLANG_VERSION/External
tar xvf $CWD/SPIRV-Tools-$SPIRV_TOOLS_VERSION.tar.?z || exit 1
mv SPIRV-Tools-$SPIRV_TOOLS_VERSION spirv-tools
cd spirv-tools/external
tar xvf $CWD/SPIRV-Headers-$SPIRV_HEADERS_VERSION.tar.?z || exit 1
mv SPIRV-Headers-$SPIRV_HEADERS_VERSION spirv-headers


cd $TMP/glslang-${GLSLANG_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 {} \+

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

mkdir -p build
cd build
cmake \
  -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
  -DCMAKE_INSTALL_PREFIX=/usr \
  -DCMAKE_INSTALL_LIBDIR=lib$LIBDIRSUFFIX \
  -DCMAKE_BUILD_TYPE=Release \
  -DBUILD_SHARED_LIBS=On \
  -DSPIRV_TOOLS_BUILD_STATIC=Off \
  ..
make $NUMJOBS || make || exit 1
make install DESTDIR=$PKG || exit 1

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

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