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completion.sh
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			#!/bin/bash
			###-begin-npm-completion-###
			#
			# npm command completion script
			#
			# Installation: npm completion >> ~/.bashrc (or ~/.zshrc)
			# Or, maybe: npm completion > /usr/local/etc/bash_completion.d/npm
			#

			if type complete &>/dev/null; then
			_npm_completion () {
			local words cword
			if type _get_comp_words_by_ref &>/dev/null; then
			_get_comp_words_by_ref -n = -n @ -w words -i cword
			else
			cword="$COMP_CWORD"
			words=("${COMP_WORDS[@]}")
			fi

			local si="$IFS"
			IFS=$'\n' COMPREPLY=($(COMP_CWORD="$cword" \
			COMP_LINE="$COMP_LINE" \
			COMP_POINT="$COMP_POINT" \
			npm completion -- "${words[@]}" \
			2>/dev/null)) \|\| return $?
			IFS="$si"
			}
			complete -o default -F _npm_completion npm
			elif type compdef &>/dev/null; then
			_npm_completion() {
			local si=$IFS
			compadd -- $(COMP_CWORD=$((CURRENT-1)) \
			COMP_LINE=$BUFFER \
			COMP_POINT=0 \
			npm completion -- "${words[@]}" \
			2>/dev/null)
			IFS=$si
			}
			compdef _npm_completion npm
			elif type compctl &>/dev/null; then
			_npm_completion () {
			local cword line point words si
			read -Ac words
			read -cn cword
			let cword-=1
			read -l line
			read -ln point
			si="$IFS"
			IFS=$'\n' reply=($(COMP_CWORD="$cword" \
			COMP_LINE="$line" \
			COMP_POINT="$point" \
			npm completion -- "${words[@]}" \
			2>/dev/null)) \|\| return $?
			IFS="$si"
			}
			compctl -K _npm_completion npm
			fi
			###-end-npm-completion-###