#!/bin/bash
set -x -e -v

# This script is for building the DirectX Shader Compiler (DXC).
# It takes the target CPU architecture as parameter ("x86_64" or "aarch64").

export MOZ_DXC_TARGET_ARCH=$1

# Detect a windows SDK version by looking at the directory names in
# "Windows Kits/10/Include/". At the time of writing this comment, there
# is one, but we pick the first result in alphabetical order in to reduce
# the risk of breakage if the vs-toolchain job changes.
export MOZ_DXC_WIN10_SDK_VERSION=`ls fetches/vs/Windows\ Kits/10/Include/ | sort | head -n 1`

export VSINSTALLDIR="$MOZ_FETCHES_DIR/vs"

artifact=$(basename "$TOOLCHAIN_ARTIFACT")
dxc_folder=${artifact%.tar.*}


cd "$HOME/fetches/DirectXShaderCompiler"

# Configure and build.
mkdir build
cd build

# Note: it is important that LLVM_ENABLE_ASSERTIONS remains enabled.

cmake .. \
  -C ../cmake/caches/PredefinedParams.cmake \
  -DCMAKE_TOOLCHAIN_FILE=../cmake/platforms/WinMsvc.cmake \
  -DHOST_ARCH="$MOZ_DXC_TARGET_ARCH" \
  -DCMAKE_BUILD_TYPE=Release \
  -DLLVM_DISABLE_ASSEMBLY_FILES=ON \
  -DLLVM_NATIVE_TOOLCHAIN="$MOZ_FETCHES_DIR/clang" \
  -DLLVM_WINSYSROOT="$VSINSTALLDIR" \
  -DDIASDK_INCLUDE_DIR="$VSINSTALLDIR/DIA SDK/include" \
  -DWIN10_SDK_PATH="$VSINSTALLDIR/Windows Kits/10" -DWIN10_SDK_VERSION="$MOZ_DXC_WIN10_SDK_VERSION" \
  -DCMAKE_RC_COMPILER="$MOZ_FETCHES_DIR/clang/bin/llvm-rc" \
  -DHLSL_INCLUDE_TESTS=OFF -DCLANG_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_TESTS=OFF \
  -DHLSL_BUILD_DXILCONV=OFF -DSPIRV_WERROR=OFF \
  -DENABLE_SPIRV_CODEGEN=OFF \
  -DLLVM_ENABLE_ASSERTIONS=ON \
  -DLLVM_ASSERTIONS_NO_STRINGS=ON \
  -DLLVM_ASSERTIONS_TRAP=ON \
  -DDXC_CODEGEN_EXCEPTIONS_TRAP=ON \
  -DDXC_DISABLE_ALLOCATOR_OVERRIDES=ON \
  -G Ninja


# Only build the required target.
ninja dxcompiler.dll

# Pack the result and upload.
mkdir $dxc_folder
mv bin/dxcompiler.dll $dxc_folder

mkdir -p $UPLOAD_DIR
tar cavf $UPLOAD_DIR/$artifact $dxc_folder