#!/usr/bin/env bash
# bin/compile <build-dir> <cache-dir>

# fail fast
set -e

mktmpdir() {
  dir=$(mktemp -t node-$1-XXXX)
  rm -rf $dir
  mkdir -p $dir
  echo $dir
}

# config
NODE_VERSION="0.4.7"
NPM_VERSION="1.0.27"
SCONS_VERSION="1.2.0"

# parse and derive params
BUILD_DIR=$1
CACHE_DIR=$2
LP_DIR=`cd $(dirname $0); cd ..; pwd`
CACHE_STORE_DIR=$CACHE_DIR"/node_modules/$NPM_VERSION"
CACHE_TARGET_DIR=$BUILD_DIR"/node_modules"

# s3 packages
NODE_PACKAGE="http://language-pack-nodejs.s3.amazonaws.com/nodejs-${NODE_VERSION}.tgz"
NPM_PACKAGE="http://language-pack-nodejs.s3.amazonaws.com/npm-${NPM_VERSION}.tgz"
SCONS_PACKAGE="http://language-pack-nodejs.s3.amazonaws.com/scons-${SCONS_VERSION}.tgz"

# vendor directories
VENDORED_NODE="$(mktmpdir node)"
VENDORED_NPM="$(mktmpdir npm)"
VENDORED_SCONS="$(mktmpdir scons)"

# download and unpack packages
echo "-----> Fetching Node.js binaries"
mkdir -p $VENDORED_NODE  && curl $NODE_PACKAGE -s -o -  | tar xzf - -C $VENDORED_NODE
mkdir -p $VENDORED_NPM   && curl $NPM_PACKAGE -s -o -   | tar xzf - -C $VENDORED_NPM
mkdir -p $VENDORED_SCONS && curl $SCONS_PACKAGE -s -o - | tar xzf - -C $VENDORED_SCONS

# vendor node into the slug
PATH="$BUILD_DIR/bin:$PATH"
echo "-----> Vendoring node $NODE_VERSION"
mkdir -p "$BUILD_DIR/bin"
cp "$VENDORED_NODE/bin/node" "$BUILD_DIR/bin/node"

# setting up paths for building
PATH="$VENDORED_SCONS:$VENDORED_NODE/bin:$PATH"
INCLUDE_PATH="$VENDORED_NODE/include"
export CPATH="$INCLUDE_PATH"
export CPPPATH="$INCLUDE_PATH"

# unpack existing cache
rm -rf $CACHE_TARGET_DIR
if [ -d $CACHE_STORE_DIR ]; then
  cp -a $CACHE_STORE_DIR $CACHE_TARGET_DIR
fi

# install dependencies with npm
echo "-----> Installing dependencies with npm $NPM_VERSION"
cd $BUILD_DIR
HOME="$BUILD_DIR" $VENDORED_NODE/bin/node $VENDORED_NPM/cli.js install 2>&1 | sed -u 's/^/       /'
if [ "${PIPESTATUS[*]}" != "0 0" ]; then
  echo " !     Failed to install dependencies with npm"
  exit 1
else
  echo "       Dependencies installed"
fi

# repack cache with new assets
if [ -d $CACHE_TARGET_DIR ]; then
  rm -rf $CACHE_STORE_DIR
  mkdir -p $(dirname $CACHE_STORE_DIR)
  cp -a $CACHE_TARGET_DIR $CACHE_STORE_DIR
fi
