#!/bin/bash

if [ -z "$1" ]; then
   echo ''
   echo " Usage: $0 <ver> [<arch>]"
   echo ''
   echo " Example: $0 17.0.6"
   echo ''
   echo ' Expects openmp-<ver>.tar.xz and cmake-<ver>.tar.xz'
   echo ' If not present the version is assumed to be a release tag and I will try to downoad them.'
   echo ''
   exit 1
fi 

set -e

ARCH="$2"
VER="$1"

if [ ! -e openmp-${VER}.src.tar.xz ]; then
    echo NOTE: cannot find openmp-${VER}.src.tar.xz - trying to download
    curl -sSfLO https://github.com/llvm/llvm-project/releases/download/llvmorg-${VER}/openmp-${VER}.src.tar.xz
fi

TAR="openmp-${VER}.src.tar.xz"
BASE="`echo $TAR | sed 's:\.tar.*::'`"
echo $TAR '->' $BASE
if [ -z "$BASE" ]; then
    echo "ERROR: can't figure out the base"
    exit 1
fi

if [ ! -e "$BASE" -a -e "$TAR" ]; then
    tar fxz "$TAR"
fi
if [ ! -e "$BASE" ]; then
    echo "ERROR: extract expected at $BASE but it's not ..."
    exit 1
fi

if [ ! -e "$BASE/cmake/ExtendPath.cmake" ]; then
    echo "INFO: copying missing cmake files"
    ## annoying as hell, but we have no choice but to add the missing cmake files
    if [ ! -e cmake-${VER}.src.tar.xz ]; then
	echo NOTE: cannot find cmake-${VER}.src.tar.xz - trying to download
	curl -sSfLO https://github.com/llvm/llvm-project/releases/download/llvmorg-${VER}/cmake-${VER}.src.tar.xz
    fi
    if [ ! -d cmake-${VER}.src ]; then
	tar fxz cmake-${VER}.src.tar.xz
    fi
    cp cmake-${VER}.src/Modules/* $BASE/cmake/
fi

if [ -n "$ARCH" ]; then
    CMAKEARCH=-DCMAKE_OSX_ARCHITECTURES=$ARCH
else
    for arch in x86_64 arm64; do
	if [ ! -e dst-Release-$arch -o ! -e dst-Debug-$arch ]; then
	    sh bld $VER $arch
	fi
    done
    for i in Release Debug; do
	rm -rf dst-$i
	rsync -a dst-$i-arm64/ dst-$i/
	rm dst-$i/usr/local/lib/*
	lipo -create -arch arm64 dst-$i-arm64/usr/local/lib/libomp.dylib \
	     -arch x86_64 dst-$i-x86_64/usr/local/lib/libomp.dylib \
	     -output dst-$i/usr/local/lib/libomp.dylib
	codesign -s Dev -f --timestamp dst-$i/usr/local/lib/libomp.dylib
	( cd dst-$i && tar fcz ../openmp-${VER}-darwin20-$i.tar.gz --uid 0 --gid 80 usr/local/include/* usr/local/lib/* )
	tar fvtz openmp-${VER}-darwin20-$i.tar.gz
    done
    file dst-Release/usr/local/lib/* dst-Debug/usr/local/lib/*
    exit 0
fi

set -v

export MACOSX_DEPLOYMENT_TARGET=11.0
export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk

cmakedir=/Applications/CMake.app

rm -rf "${BASE}/build"
mkdir -p "${BASE}/build"
(cd "${BASE}/build" && $cmakedir/Contents/bin/cmake $CMAKEARCH -DLLVM_INCLUDE_BENCHMARKS=OFF -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ .. && make -j8 install DESTDIR=dst-Release-$ARCH && \
 make clean && \
 /Applications/CMake.app/Contents/bin/cmake $CMAKEARCH -DLLVM_INCLUDE_BENCHMARKS=OFF -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Debug .. &&  make -j8 install DESTDIR=dst-Debug-$ARCH )

for lib in `ls $BASE/build/dst-*$ARCH/usr/local/lib/libomp.dylib`; do
    install_name_tool -id /usr/local/lib/libomp.dylib $lib
done

for i in Release Debug; do
    DST="dst-$i-$ARCH"
    rm -rf "$DST"
    mkdir -p $DST/usr/local/include $DST/usr/local/lib
    cp -p $BASE/build/dst-$i-$ARCH/usr/local/include/* $DST/usr/local/include/
    cp -p $BASE/build/dst-$i-$ARCH/usr/local/lib/libomp.dylib $DST/usr/local/lib/
done

otool -L dst-*$ARCH/usr/local/lib/libomp.dylib