configure

# Anticonf (tm) script by Jeroen Ooms (2023)
# This script will query 'pkg-config' for the required cflags and ldflags.
# If pkg-config is unavailable or does not find the library, try setting
# INCLUDE_DIR and LIB_DIR manually via e.g:
# R CMD INSTALL --configure-vars='INCLUDE_DIR=/.../include LIB_DIR=/.../lib'

# Library settings
PKG_CONFIG_NAME="protobuf grpc++"
PKG_DEB_NAME="libgrpc++-dev libprotobuf-dev protobuf-compiler-grpc pkg-config"
PKG_RPM_NAME="grpc-devel pkgconf"
PKG_BREW_NAME="grpc pkg-config"
PKG_TEST_HEADER="<grpc/grpc.h>"
PKG_LIBS="-lgrpc++ -lgrpc -lprotobuf"
PKG_CFLAGS=""
#CI=1

# Hardcode some targets
PROTO_FILES="google/api/field_behavior.proto google/api/http.proto google/api/launch_stage.proto google/api/resource.proto google/cloud/bigquery/storage/v1/arrow.proto google/cloud/bigquery/storage/v1/avro.proto google/cloud/bigquery/storage/v1/table.proto google/api/annotations.proto google/api/client.proto google/cloud/bigquery/storage/v1/protobuf.proto google/cloud/bigquery/storage/v1/stream.proto google/rpc/status.proto google/cloud/bigquery/storage/v1/storage.proto"
GRPC_FILES="google/cloud/bigquery/storage/v1/storage.proto"

# Use pkg-config if available
if [ `command -v pkg-config` ]; then
  PKGCONFIG_CFLAGS=`pkg-config --cflags --silence-errors ${PKG_CONFIG_NAME}`
  PKGCONFIG_LIBS=`pkg-config --libs ${PKG_CONFIG_NAME}`
  PKGCONFIG_PROTOBUF_VERSION=`pkg-config --modversion --silence-errors protobuf`
fi

# Note that cflags may be empty in case of success
if [ "$INCLUDE_DIR" ] || [ "$LIB_DIR" ]; then
  echo "Found INCLUDE_DIR and/or LIB_DIR!"
  PKG_CFLAGS="-I$INCLUDE_DIR $PKG_CFLAGS"
  PKG_LIBS="-L$LIB_DIR $PKG_LIBS"
elif [ "$PKGCONFIG_CFLAGS" ] || [ "$PKGCONFIG_LIBS" ]; then
  echo "Found pkg-config cflags and libs!"
  PKG_CFLAGS=`echo $PKGCONFIG_CFLAGS | sed 's/-Wno[a-z-]*//g' |  tr ' ' '\n' | sort -u | xargs`
  PKG_LIBS=${PKGCONFIG_LIBS}
elif [ `uname` = "Darwin" ]; then
  test ! "$CI" && brew --version 2>/dev/null
  if [ $? -eq 0 ]; then
    BREWDIR=`brew --prefix`
    PATH="$BREWDIR/bin:$PATH"
    PKG_CFLAGS="-I$BREWDIR/include"
    PKG_LIBS="-L$BREWDIR/lib $PKG_LIBS"
  else
    curl -sfL "https://autobrew.github.io/scripts/grpc" > autobrew
    . ./autobrew
  fi
fi

# For debugging
echo "Using PKG_CFLAGS=$PKG_CFLAGS"
echo "Using PKG_LIBS=$PKG_LIBS"

# Use CXX17 if available (preferred for recent libprotobuf)
CXX17=`${R_HOME}/bin/R CMD config CXX17` || unset CXX17

if [ "$CXX17" ]; then
CXX="$CXX17 `${R_HOME}/bin/R CMD config CXX17STD`"
CXXFLAGS=`${R_HOME}/bin/R CMD config CXX17FLAGS`
echo "Found C++17 compiler: $CXX $CXXFLAGS"
else
CXX=`${R_HOME}/bin/R CMD config CXX`
CXXFLAGS=`${R_HOME}/bin/R CMD config CXXFLAGS`
echo "Using default C++ compiler: $CXX $CXXFLAGS"
fi

# Test configuration
CPPFLAGS=`${R_HOME}/bin/R CMD config CPPFLAGS`
echo "#include $PKG_TEST_HEADER" | ${CXX} -E ${CPPFLAGS} ${PKG_CFLAGS} ${CXXFLAGS} -xc++ - >/dev/null 2>configure.log

# Customize the error
if [ $? -ne 0 ]; then
  echo "------------------------------[ ANTICONF ]-----------------------------"
  echo "Configuration failed to find $PKG_CONFIG_NAME. Try installing:"
  echo " * deb: $PKG_DEB_NAME (Debian, Ubuntu, etc)"
  echo " * rpm: $PKG_RPM_NAME (Fedora, EPEL)"
  echo " * brew: $PKG_BREW_NAME (OSX)"
  echo "If $PKG_CONFIG_NAME is already installed, check that 'pkg-config' is in your"
  echo "PATH and PKG_CONFIG_PATH contains a $PKG_CONFIG_NAME.pc file. If pkg-config"
  echo "is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:"
  echo "R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'"
  echo "----------------------------[ ERROR MESSAGE ]----------------------------"
  cat configure.log
  echo "------------------------------------------------------------------------"
  exit 1
fi

# Write to Makevars
sed -e "s|@cflags@|$PKG_CFLAGS|" -e "s|@libs@|$PKG_LIBS|" src/Makevars.in > src/Makevars

# Look for 'protoc' compiler
if [ `command -v protoc` ]; then
  PROTOC_VERSION=`protoc --version`
  echo "Using ${PROTOC_VERSION} from `command -v protoc`"
else
  echo "Failed to run protoc."
  echo "Please install the 'protobuf-compiler' package for your system."
  exit 1
fi

# Look for grpc plugin
if [ `command -v grpc_cpp_plugin` ]; then
  echo "Using `command -v grpc_cpp_plugin`"
else
  echo "Failed to locate grpc_cpp_plugin. Please install the grpc protoc plugin:"
  echo "Debian/Ubuntu: apt-get install protobuf-compiler-grpc"
  echo "Fedora/RHEL: yum install grpc-plugins"
  exit 1
fi

# Try to check if protoc version matches libproto
case $PROTOC_VERSION in
  *"$PKGCONFIG_PROTOBUF_VERSION"*)
    ;;
  *)
    echo "Heads up: protoc version $PROTOC_VERSION might not match libproto version $PKGCONFIG_PROTOBUF_VERSION.";
    ;;
esac

# Compile proto files
srcdir="$PWD/src"
cd ./src/protos
protoc --experimental_allow_proto3_optional --cpp_out=${srcdir} ${PROTO_FILES}
protoc --experimental_allow_proto3_optional --plugin=protoc-gen-grpc=$(which grpc_cpp_plugin) --grpc_out=${srcdir} google/cloud/bigquery/storage/v1/storage.proto
if [ $? -ne 0 ]; then
  echo "Error: failed to compile proto files."
  exit 1
fi
cd ../..

# Suppress warnings about pragmas and deprecations in autogenerated code
find ./src/google -type f  -name '*.pb.*' -exec sed -i.bak 's/PROTOBUF_DEPRECATED//g' {} \;
find ./src/google -type f  -name '*.pb.h' -exec sed -i.bak 's/#pragma/# pragma/g' {} \;

# Fix a conflicting name with some macro
sed -i.bak "s/OPTION/OPTIONFIX/g" src/google/api/field_behavior.pb.h

# Success
exit 0