Use npm global without sudo on OSX

node_mac.sh

#!/bin/bash

#
# Install or Update Homebrew as needed
#
which -s brew
if [[ $? != 0 ]] ; then
    # Install Homebrew
    # https://github.com/mxcl/homebrew/wiki/installation
    ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
else
    brew update
fi

#
# Install Node/NPM globally without sudo.
# http://www.johnpapa.net/how-to-use-npm-global-without-sudo-on-osx/
#

# This adds node, sans npm
brew install node --without-npm

# Create a directory for your global packages.
mkdir "${HOME}/.npm-packages"

# Reference this directory for future usage in your .bashrc file.
echo NPM_PACKAGES="${HOME}/.npm-packages" >> ${HOME}/.bashrc

# Indicate to npm where to store your globally installed package, in your ~/.npmrc file.
echo prefix=${HOME}/.npm-packages >> ${HOME}/.npmrc

# This gets and installs the latest npm, which is 2.1.16 at the time of this writing.
curl -L https://www.npmjs.org/install.sh | sh

# Ensure node will find the packages by adding the path to your .bashrc.
echo NODE_PATH=\"\$NPM_PACKAGES/lib/node_modules:\$NODE_PATH\" >> ${HOME}/.bashrc

# Ensure you’ll find installed binaries by adding the following to your .bashrc.
echo PATH=\"\$NPM_PACKAGES/bin:\$PATH\" >> ${HOME}/.bashrc

# Ensure that you source your .bashrc file by adding the following to your .bash_profile.
echo source "~/.bashrc" >> ${HOME}/.bash_profile

# Source your .bashrc file once. Previous step did this for the future, but this does it right away.
source ~/.bashrc