#!/usr/bin/env bash

set -euf -o pipefail

NDK=$1

DEST_CPU_ARCH='arm'
API_LEVEL=26
BUILD_HOST_TAG='linux-x86_64'
TOOLCHAIN_DIR=$NDK/toolchains/llvm/prebuilt/$BUILD_HOST_TAG/

if [[ ! -d "$NDK" ]]; then
  echo "Android NDK directory '$NDK' invalid"
  exit 1
fi

if [[ ! -d "$TOOLCHAIN_DIR" ]]; then
  echo "Toolchain directory '$TOOLCHAIN_DIR' invalid"
  exit 1
fi

# The naming of these isn't very consistent, as some tools start with arm,
# others with arm7a.
export AR=$TOOLCHAIN_DIR/bin/arm-linux-androideabi-ar
export CC=$TOOLCHAIN_DIR/bin/armv7a-linux-androideabi$API_LEVEL-clang
export CXX=$TOOLCHAIN_DIR/bin/armv7a-linux-androideabi$API_LEVEL-clang++
export LD=$TOOLCHAIN_DIR/bin/arm-linux-androideabi-ld
export LINK=$TOOLCHAIN_DIR/bin/armv7a-linux-androideabi$API_LEVEL-clang++
export RANLIB=$TOOLCHAIN_DIR/bin/arm-linux-androideabi-ranlib
export STRIP=$TOOLCHAIN_DIR/bin/arm-linux-androideabi-strip

export LDFLAGS="-static-libstdc++"

cd node

export GYP_DEFINES="OS=android clang=1"

function myconf() {
  ./configure \
      --dest-cpu=$DEST_CPU_ARCH \
      --dest-os=android \
      --without-snapshot \
      --without-intl \
      --openssl-no-asm \
      --without-bundled-v8 \
      --shared
}

if [ -z ${2+x} ]; then
  myconf && make
else
  eval $2
fi