configure

#! /usr/bin/env sh

echo "** Running ./configure"

# Check that this is not just ./configure. We need to run this
# from R CMD INSTALL, to have the R env vars set.

if [ -z "$R_HOME" ]; then
  echo >&2 R_HOME is not set, are you running R CMD INSTALL?
  exit 1
fi

# Find the R binary we need to use. This is a bit trickier on
# Windows, because it has two architectures. On windows R_ARCH_BIN
# is set, so this should work everywhere.
export RBIN="${R_HOME}/bin${R_ARCH_BIN}/R"

"$RBIN" --vanilla --slave -f tools/dynamic-help.R

BUILD_PLATFORM=
TARGET_PLATFORM=

while [ -n "$1" ]; do
  case $1 in
    --build)
      if [ -n "$2" ]; then
        BUILD_PLATFORM="$2"
        shift
      else
        printf 'ERROR: "--build" requires a non-empty option argument.\n' >&2
        exit 1
      fi
      ;;
    --build=?*)
      BUILD_PLATFORM="${1#*=}"
      ;;
    --build=)
      printf 'ERROR: "--build" requires a non-empty option argument.\n' >&2
      exit 1
      ;;
    --host)
      if [ -n "$2" ]; then
        TARGET_PLATFORM="$2"
        shift
      else
        printf 'ERROR: "--hosr" requires a non-empty option argument.\n' >&2
        exit 1
      fi
      ;;
    --host=)
      printf 'ERROR: "--host" requires a non-empty option argument.\n' >&2
      exit 1
      ;;
    --host=?*)
      TARGET_PLATFORM=${1#*=}
      ;;
  esac
  shift
done

cat src/Makevars.in | \
  sed "s|@BUILD_PLATFORM@|${BUILD_PLATFORM}|" | \
  sed "s|@TARGET_PLATFORM@|${TARGET_PLATFORM}|" > src/Makevars

cat R/build-data.R.in | \
  sed "s|@BUILD_PLATFORM@|${BUILD_PLATFORM}|" | \
  sed "s|@TARGET_PLATFORM@|${TARGET_PLATFORM}|" > R/build-data.R