#!/bin/bash

set -e

function download() {

url=$1

name=$2

if [ -f "`pwd`/${name}" ]; then

ctx logger info "`pwd`/${name} already exists, No need to download"

else

# download to given directory

ctx logger info "Downloading ${url} to `pwd`/${name}"

set +e

curl_cmd=$(which curl)

wget_cmd=$(which wget)

set -e

if [[ ! -z ${curl_cmd} ]]; then

curl -L -o ${name} ${url}

elif [[ ! -z ${wget_cmd} ]]; then

wget -O ${name} ${url}

else

ctx logger error "Failed to download ${url}: Neither 'cURL' nor 'wget' were found on the system"

exit 1;

fi

fi

}

function untar() {

tar_archive=$1

destination=$2

inner_name=$(tar -tf "${tar_archive}" | grep -o '^[^/]\+' | sort -u)

if [ ! -d ${destination} ]; then

ctx logger info "Untaring ${tar_archive}"

tar -xf ${tar_archive}

ctx logger info "Moving ${inner_name} to ${destination}"

mv ${inner_name} ${destination}

fi

}

TEMP_DIR='/tmp'

NODEJS_TARBALL_NAME='node-v6.9.1-linux-x64.tar.xz'

################################

# Directory that will contain:

# - NodeJS binaries

################################

NODEJS_ROOT=${TEMP_DIR}/$(ctx execution-id)/nodejs

NODEJS_BINARIES_PATH=${NODEJS_ROOT}/nodejs-binaries

mkdir -p ${NODEJS_ROOT}

cd ${TEMP_DIR}

download https://nodejs.org/dist/v6.9.1/${NODEJS_TARBALL_NAME} ${NODEJS_TARBALL_NAME}

untar ${NODEJS_TARBALL_NAME} ${NODEJS_BINARIES_PATH}

# this runtime property is used by the start-nodecellar-app.sh

ctx instance runtime_properties nodejs_binaries_path ${NODEJS_BINARIES_PATH}

ctx logger info "Fixing node path in npm-cli.js..."

NPM_CLI_PATH=${NODEJS_BINARIES_PATH}/lib/node_modules/npm/bin/npm-cli.js

NPM_CLI_FIRST_LINE="\#\!${NODEJS_BINARIES_PATH}/bin/node"

sed -i "1s/.*/${NPM_CLI_FIRST_LINE//\//\\/}/" ${NPM_CLI_PATH}

ctx logger info "Sucessfully installed NodeJS"