Adding locally installed node.js binaries to $PATH

node-modules-binaries-to-path.sh

#!/bin/bash
# To add locally installed node.js binaries to $PATH 
# Add the following code to your ~/.profile|~/.bash_profile|...

# If npm is available
if hash npm 2>/dev/null; then
	# previously appended string
	_NMB_PREVIOUS=""
	_PREVIOUS_PATH=""
	function addNodeModulesBinariesToPath() {
		CURRENT_PATH=$(pwd);
		# Avoid npm bin when path does not change
		if [ "${CURRENT_PATH}" != "${_PREVIOUS_PATH}" ]; then
			NMB_PATH=$(npm bin)
			# Avoid updating path when node_modules binaries does not change
			if [ "${NMB_PATH}" != "${_NMB_PREVIOUS}" ]; then
				# Remove previously added string if non empty
				if [ -n "${_NMB_PREVIOUS}" ]; then
					PATH=$(echo $PATH | sed -e "s|${_NMB_PREVIOUS}||")
				fi
				# Append current binary path to path
				export PATH="$PATH:${NMB_PATH}"
				export _NMB_PREVIOUS=":${NMB_PATH}"
			fi
		fi
		_PREVIOUS_PATH=${CURRENT_PATH}
	}

	# Run addNodeModulesBinariesToPath after each command
	export PROMPT_COMMAND="${PROMPT_COMMAND};addNodeModulesBinariesToPath"
fi