re-install-node.sh

## NODE-REINSTALL

#!/bin/bash
	# node-reinstall
	# credit: http://stackoverflow.com/a/11178106/2083544


	## program version
	VERSION="0.0.17"


	## path prefix
	PREFIX="${PREFIX:-/usr/local}"


	## version control systems
	USE_NAVE=0
	USE_NVM=1


	# use --force to bypass user confirmation
	FORCE=0


	## default node version
	NODE_VERSION=“8.1.4”


	usage () {
	  printf "%s\n" "node-reinstall"
	  printf "\t%s\n" "completely re-installs Node & NPM and any global node modules."
	  printf "\t%s\n" "It re-installs Node using NVM or Nave"
	  printf "\n"
	  printf "%s\t%s\n" "Usage:" "node-reinstall [--nave|--nvm|--nvm-latest] [-h|--help] [-v|--version] [NODE_VERSION]"
	  printf "\n"
	  printf "%s\n" "Commands:"
	  printf "\n"
	  printf "\t%s\t\t\t%s\n" "node-reinstall" "re-install node and npm using nvm"
	  printf "\t%s %s\t%s\n" "node-reinstall" "[-h|--help]" "show help"
	  printf "\t%s %s\t%s\n" "node-reinstall" "[-v|--version]" "show the node-reinstall version number"
	  printf "\t%s %s\t%s\n" "node-reinstall" "[-f|--force]" "installs defaults without user confirmation"
	  printf "\t%s %s\t\t%s\n" "node-reinstall" "--nave" "re-install using nave"
	  printf "\t%s %s\t\t%s\n" "node-reinstall" "--nvm" "re-install using stable nvm - the default"
	  printf "\t%s %s\t%s\n" "node-reinstall" "--nvm-latest" "re-install using latest nvm - creationix/nvm:master"
	  printf "\t%s %s\t\t%s\n" "node-reinstall" "0.12" "specify a default node version - currently ${NODE_VERSION}"
	  printf "\n"
	}


	## parse opts
	{


	  for opt in ${@}; do
	    case $opt in
	      --help|-h)
	        usage
	        exit
	        ;;


	      --version|-v)
	        echo ${VERSION}
	        exit
	        ;;


	      --force|-f)
	        FORCE=1
	        ;;


	      --nave)
	        USE_NAVE=1
	        USE_NVM=0
	        ;;


	      --nvm)
	        USE_NVM=1
	        USE_NAVE=0
	        ;;


	      --nvm-latest)
	        USE_NVM=1
	        USE_NAVE=0
	        STABLE=master
	        ;;


	      *)
	        if [ "-" == "${opt:0:1}" ]; then
	          echo >&2 "error: Unknown option \`$opt'"
	          usage >&2
	          exit 1
	        fi


	        NODE_VERSION="${opt}"
	    esac
	  done


	}


	confirm ()
	{
	  if [[ $FORCE == 0 ]]; then
	    echo ""
	    echo "Would you like to continue running node-reinstall?"
	    echo ""
	    select yn in "Yes" "No"; do
	          case $yn in
	              Yes ) break;;
	              No ) exit;;
	          esac
	    done
	  fi
	}


	# get sudo
	sudo -v


	# if node is installed, get the installed version
	INSTALLED_NODE_VERSION=$(node --version 2> /dev/null)
	if [[ ! -z $INSTALLED_NODE_VERSION ]]; then
	  echo "Found a version of Node.js that is already installed."
	  echo "If you continue now, we will re-install Node.js version $INSTALLED_NODE_VERSION"
	  NODE_VERSION=$INSTALLED_NODE_VERSION
	  echo $NODE_VERSION
	  confirm
	fi


	# check to see if npm is installed
	IS_NPM_MISSING=$(which npm)
	if [[ -z $IS_NPM_MISSING ]]; then
	  echo "Installing Node, npm."
	else
	  echo "Completely reinstalling Node, npm."
	  # get list of global npm modules to reinstall
	  # omit the lib directory listing
	  GLOBAL_MODULES=`npm -g list --depth 0 --parseable | xargs basename | sed -E 's/^(lib|npm)$//g'`
	  if [[ -n $GLOBAL_MODULES ]]; then
	    echo "Will reinstall these global npm modules:"
	    echo $GLOBAL_MODULES
	  else
	    echo "===== ALERT! ====="
	    echo "The script did not find any global node modules (npm -g list)"
	    echo "If you are sure you installed global node modules"
	    echo "(by running npm install -g some-module), you might want to stop "
	    echo "here and locate those, because they won't be re-installed,"
	    echo "and since we'll be deleting all the possible install paths "
	    echo "that most people could use, you probably won't find them."
	    echo ""
	    echo "This can sometimes happen if you've installed global node modules"
	    echo "under a different node environment (for example, using nvm or nave)."
	    echo "It might help to run: "
	    echo "history | grep 'npm install' and look for either -g or --global"
	    echo ""
	    echo "If you aren't really sure, or you are sure and don't care, "
	    echo "you can continue; we'll re-install things the proper way, and"
	    echo "the next time you run this script you'll see a list of "
	    echo "any global node modules you've installed since now."
	  fi
	  confirm
	fi


	if (( $USE_NVM )); then
	  # NVM will think it is still installed if NVM_DIR is still set
	  unset NVM_DIR
	  sudo rm -rf $HOME/.nvm
	elif (( $USE_NAVE )); then
	  sudo rm -rf $HOME/.nave
	else
	  echo >&2 "error: Unsupported version control system"
	  exit 1
	fi


	# erase all local install paths
	DIRECTORIES=("local" "lib" "include" "node*" "npm" ".npm" ".node-gyp")
	for i in "${DIRECTORIES[@]}"
	do
	   if [ -d $HOME/$i ]; then
	     LEN=$(ls -A $HOME/$i | wc -l 2> /dev/null)
	     if [[ $LEN -gt 1 ]]; then
	       echo "${HOME}/${i} has files or directories in it. You should check to see if you need the files in ${HOME}/${i} before proceeding!"
	       confirm
	     fi
	   fi
	   # do whatever on $i
	done


	rm -rf $HOME/{local,lib,include,node*,npm,.npm*,.node-gyp}


	# erase globally installed node paths
	sudo rm -rf $PREFIX/lib/node*
	sudo rm -rf $PREFIX/include/node*
	sudo rm -rf $PREFIX/bin/{node,npm}
	sudo rm -rf $PREFIX/share/man/man1/node.1
	sudo rm -rf $PREFIX/lib/dtrace/node.d


	if (( $USE_NVM )); then
	  # go home and install NVM just because I feel safe there
	  cd $HOME
	  # get the latest stable version number of nvm from the repo's homepage
	  [ "$STABLE" == "" ] && STABLE=$(curl -s -k https://github.com/creationix/nvm/ | grep "curl https://raw.githubusercontent.com/creationix/nvm/" | grep -oE "v\d+\.\d+\.\d+")
	  [[ $STABLE =~ ^v[0-9]+.[0-9]+.[0-9]+$ ]] || STABLE="v0.25.1"
	  curl -sL https://raw.githubusercontent.com/creationix/nvm/$STABLE/install.sh | bash
	  source $HOME/.nvm/nvm.sh
	elif (( $USE_NAVE )); then
	  curl -sL https://raw.githubusercontent.com/isaacs/nave/master/nave.sh -o $PREFIX/bin/nave
	fi




	if (( $USE_NVM )); then
	  # install the specified version of node then set it as the default
	  nvm install $NODE_VERSION
	  nvm alias default $NODE_VERSION
	elif (( $USE_NAVE )); then
	  nave usemain $NODE_VERSION
	fi


	if [[ ! -z ${GLOBAL_MODULES// } ]]; then
	  echo "Reinstalling your global npm modules:"
	  echo $GLOBAL_MODULES
	  if [[ $FORCE == 0 ]]; then
	    echo "Continue?"
	    select yn in "Yes" "No"; do
	      case $yn in
	        Yes ) npm install --global $GLOBAL_MODULES; break;;
	        No ) exit;;
	      esac
	    done
	  else
	    npm install --global $GLOBAL_MODULES
	  fi


	fi


	if [[ $OSTYPE =~ "darwin" ]]; then
	  echo "node-reinstall is done. 👍"
	else
	  echo "node-reinstall is done."
	fi


	echo "You must restart your terminal for changes to take effect."