#!/bin/bash
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.

# Download llvm, clang and needed libraries

set -e
set -o pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SHASUM=${SHASUM:-shasum -a 256}

LLVM_VER="11.1.0"
LLVM_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VER}/llvm-project-${LLVM_VER}.src.tar.xz"
LLVM_SHA="74d2529159fd118c3eac6f90107b5611bccc6f647fdea104024183e8d5e25831"
LLVM_FILE="llvm-project.src.tar.xz"

mkdir -p "${SCRIPT_DIR}/download"
pushd "${SCRIPT_DIR}/download" >/dev/null

if [ ! -f "${LLVM_FILE}" ]; then
    curl -L "${LLVM_URL}" --output "${LLVM_FILE}"
fi
echo "${LLVM_SHA}  ${LLVM_FILE}" | $SHASUM -c

rm -rf "llvm-project-${LLVM_VER}.src" "llvm-project"

tar xf "${LLVM_FILE}"
mv "llvm-project-${LLVM_VER}.src" "llvm-project"

popd >/dev/null