node-installer.sh/setup-node-ubuntu.bash

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NODEJS_VER=${1}
NODEJS_VERT=$(echo ${NODEJS_VER} | cut -c 2- | cut -d '.' -f1)
NODEJS_NAME="node"
NODEJS_BASE_URL="https://nodejs.org"
if [ $NODEJS_VERT -ge 1 ] && [ $NODEJS_VERT -lt 4 ]
then
echo "Selecting io.js instead of node.js for this version (>= 1.0.0 < 4.0.0)"
NODEJS_BASE_URL="https://iojs.org"
NODEJS_NAME="iojs"
fi
if [ -n "$(arch | grep 64)" ]; then
ARCH="x64"
elif [ -n "$(arch | grep armv7l)" ]; then
ARCH="armv7l"
elif [ -n "$(arch | grep armv6l)" ]; then
ARCH="armv6l"
else
ARCH="x86"
fi
NODEJS_REMOTE="${NODEJS_BASE_URL}/dist/${NODEJS_VER}/${NODEJS_NAME}-${NODEJS_VER}-linux-${ARCH}.tar.gz"
NODEJS_LOCAL="/tmp/${NODEJS_NAME}-${NODEJS_VER}-linux-${ARCH}.tar.gz"
NODEJS_UNTAR="/tmp/${NODEJS_NAME}-${NODEJS_VER}-linux-${ARCH}"
if [ -n "${NODEJS_VER}" ]; then
echo "installing ${NODEJS_NAME} as ${NODEJS_NAME} ${NODEJS_VER}..."
if [ -n "$(which curl 2>/dev/null)" ]; then
curl -fsSL ${NODEJS_REMOTE} -o ${NODEJS_LOCAL} || echo 'error downloading ${NODEJS_NAME}'
elif [ -n "$(which wget 2>/dev/null)" ]; then
wget --quiet ${NODEJS_REMOTE} -O ${NODEJS_LOCAL} || echo 'error downloading ${NODEJS_NAME}'
else
echo "'wget' and 'curl' are missing. Please run the following command and try again"
echo "\tsudo apt-get install --yes curl wget"
exit 1
fi
mkdir -p ${NODEJS_UNTAR}/
tar xf ${NODEJS_LOCAL} -C ${NODEJS_UNTAR}/ --strip-components=1
rm ${NODEJS_UNTAR}/{LICENSE,CHANGELOG.md,README.md}
sudo rsync -a "${NODEJS_UNTAR}/" /usr/local/
sudo chown -R $(whoami) /usr/local/lib/node_modules/
fi