My build script for Dart natives

build.sh

#!/usr/bin/env bash

set -e

cd $(dirname $0)
SCRIPT_DIR=$(pwd)

DART_BIN=$(which dart)
DART_SDK_DIR=$(dirname ${DART_BIN})/..
PLATFORM="$(uname -s)"
DART_VERSION=$(dart --version 2>&1)

case "$DART_VERSION" in
  (*32*)
    MACOS_ARCH="i386"
    LINUX_ARCH="32"
    ;;
  (*64*)
    MACOS_ARCH="x86_64"
    LINUX_ARCH="64"
    ;;
  (*)
    echo Unsupported dart architecture ${DART_VERSION}.  Exiting ... >&2
    exit 3
    ;;
esac

# see https://www.dartlang.org/articles/native-extensions-for-standalone-dart-vm/
cd ${SCRIPT_DIR}/..

cp -r ${X_DIR} X11

CURRENT_DIR=$(pwd)
FILENAME=$1
FILE_PATH=$(locate ${FILENAME})
FILE_DIR=$(dirname ${FILE_PATH})
FILE=$(basename ${FILENAME} .cc)

pub install
echo Building natives for platform ${PLATFORM}/${MACOS_ARCH}
case "$PLATFORM" in
  (Darwin)
    g++ -fPIC -I ${DART_SDK_DIR}/include -c ${FILE_PATH} -arch ${MACOS_ARCH} -o ${FILE_DIR}/${FILE}.o
    gcc -shared -Wl,-install_name,${FILE_DIR}/lib${FILE}.dylib,-undefined,dynamic_lookup,-arch,${MACOS_ARCH} -o \
      ${FILE_DIR}/lib${FILE}.dylib ${FILE_DIR}/${FILE}.o
    ;;
  (Linux)
    g++ -fPIC -I ${DART_SDK_DIR}/include -c ${FILE_PATH} -m${LINUX_ARCH} -o ${FILE_DIR}/${FILE}.o
    gcc -shared -Wl,-soname,${FILE_DIR}/lib${FILE}.so -o \
      ${FILE_DIR}/lib${FILE}.so ${FILE_DIR}/${FILE}.o
    ;;
  (*)
    echo Unsupported platform ${PLATFORM}.  Exiting ... >&2
    exit 3
    ;;
esac

rm ${FILE_DIR}/${FILE}.o

echo Successfully built natives