configure

#!/usr/bin/env bash

set -e
set -x
set -o pipefail
set -u
# https://github.com/llvm/llvm-project/releases/download/llvmorg-15.0.2/clang+llvm-15.0.2-arm64-apple-darwin21.0.tar.xz

LLVM_VERSION=15.0.2
LLVM_CONFIG=${LLVM_CONFIG:-llvm-config}
ARCH=arm64

command -v "${LLVM_CONFIG}" >/dev/null 2>&1 || {
    PREFIX="deps/clang-${LLVM_VERSION}"
    if [ ! -f "${PREFIX}/bin/llvm-config" ]; then
        mkdir -p "deps"
        FILE="deps/clang-${LLVM_VERSION}.tar.xz"
        if [ ! -f "${FILE}" ]; then
            URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VERSION}/clang+llvm-${LLVM_VERSION}-${ARCH}-apple-darwin21.0.tar.xz"
            echo "Downloading ${URL}..."
            curl --retry 3 -# -S -L "${URL}" -o "${FILE}.tmp" && mv "${FILE}.tmp" "${FILE}"
        fi
        rm -rf "${PREFIX}"
        mkdir -p "${PREFIX}"
        echo -n "Unpacking archive... "
        tar xf "${FILE}" -C "${PREFIX}" --strip-components 1
        echo "done."
    fi
    LLVM_CONFIG="${PREFIX}/bin/llvm-config"
}

PREFIX="$("${LLVM_CONFIG}" --prefix)"
case "${PREFIX}" in
*\ *)
    (echo >&2 "Error: Path to LLVM may not contain spaces: '${PREFIX}'")
    exit 1
    ;;
esac

echo "// Do not modify this file. Instead, rerun ./configure" >config.xcconfig
echo "LLVM_LIBDIR=$(${LLVM_CONFIG} --libdir)" >>config.xcconfig
echo "LLVM_CXXFLAGS=$(${LLVM_CONFIG} --cxxflags)" >>config.xcconfig

echo "Wrote config.xcconfig."

open XcodeClangFormat.xcodeproj