install node.js

install-node.sh

#!/usr/bin/env bash


get_os() {
  local UNAME
  UNAME="$(command uname -a)"
  local OS
  case "$UNAME" in
    Linux\ *) OS=linux ;;
    Darwin\ *) OS=darwin ;;
    SunOS\ *) OS=sunos ;;
    FreeBSD\ *) OS=freebsd ;;
    AIX\ *) OS=aix ;;
  esac

  echo "${OS-}"
}

get_arch() {
  local HOST_ARCH
  local OS
  local EXIT_CODE

  OS="$(get_os)"
  # If the OS is SunOS, first try to use pkgsrc to guess
  # the most appropriate arch. If it's not available, use
  # isainfo to get the instruction set supported by the
  # kernel.
  if [ "_$OS" = "_sunos" ]; then
    if HOST_ARCH=$(pkg_info -Q MACHINE_ARCH pkg_install); then
      HOST_ARCH=$(echo "${HOST_ARCH}" | command tail -1)
    else
      HOST_ARCH=$(isainfo -n)
    fi
  elif [ "_$OS" = "_aix" ]; then
     HOST_ARCH=ppc64
  else
     HOST_ARCH="$(command uname -m)"
  fi

  local ARCH
  case "$HOST_ARCH" in
    x86_64 | amd64) ARCH="x64" ;;
    i*86) ARCH="x86" ;;
    aarch64) ARCH="arm64" ;;
    *) ARCH="$HOST_ARCH" ;;
  esac

  echo "${ARCH}"
}


NODE_VERSION=$1
OS=$(get_os)
ARCH=$(get_arch)

if [ -z ${NODE_VERSION} ]; then
  echo "Please specify node version as an argument to install"
  exit 1;
fi

DIR=node-v${NODE_VERSION}-${OS}-${ARCH}
TAR=${DIR}.tar.xz
URL=https://nodejs.org/dist/v${NODE_VERSION}/${TAR}

echo "Downloading ${DIR}"
curl -k -s -O $URL
echo "Extracting..."
tar -xf ${TAR}
rm ${TAR}
cd $DIR
ln -sf $PWD/bin/node /usr/local/bin/node
ln -sf $PWD/bin/npm /usr/local/bin/npm

INSTALLED_VERSION=$(node --version)

if [ -z $INSTALLED_VERSION ]; then
  echo "Node.js could not be installed"
  exit 1
fi;

echo "Installed ${INSTALLED_VERSION}"