Bash completion for Yeoman generators

yo-completion.sh

# Bash completion for Yeoman generators - tested in Ubuntu, OS X and Windows (using Git bash)
function _yo_generator_complete_() {
	# local node_modules if present
	local local_modules=$(if [ -d node_modules ]; then echo "node_modules:"; fi)
	# node_modules in /usr/local/lib if present
	local usr_local_modules=$(if [ -d /usr/local/lib/node_modules ]; then echo "/usr/local/lib/node_modules:"; fi)
	# node_modules in user's Roaming/npm (Windows) if present
	local win_roam_modules=$(if [ -d $(which yo)/../node_modules ]; then echo "$(which yo)/../node_modules:"; fi)
	# concat and also add $NODE_PATH
	local node_dirs="${local_modules}${usr_local_modules}${win_roam_modules}${NODE_PATH}"
	# split $node_dirs and return anything starting with 'generator-', minus that prefix
	local generators_all=$(for dir in $(echo $node_dirs | tr ":" "\n"); do command ls -1 $dir | grep ^generator- | cut -c11-; done)
	# get the word fragment
	local word=${COMP_WORDS[COMP_CWORD]}
	# don't attempt to filter w/`grep` if `$word` is empty
	local generators_filtered=$(if [ -z "$word" ]; then echo "$generators_all"; else echo "$generators_all" | grep $word; fi)

	COMPREPLY=($generators_filtered)
}
complete -F _yo_generator_complete_ yo

cc @sindresorhus @passy