npm-list

#!/bin/sh

# Copyright (c) 2018 Andrew Steel <copyright@andrewsteel.net>
#
# SPDX-License-Identifier: MIT
#
# The MIT License:
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# npm-list:
# Lists installed NPM packages.

IFS="$(printf ' \t\n!')"; IFS="${IFS%!}"

unset -v \
	COLOR \
	COLOR_BOLD \
	COLOR_DIM \
	COLOR_RESET
if test -t 1; then
	COLOR='always'
	COLOR_BOLD="$(printf '%b' '\033[1m')"
	COLOR_DIM="$(printf '%b' '\033[2m')"
	COLOR_RESET="$(printf '%b' '\033[0m')"
else
	COLOR='never'
fi

unset -v \
	switch_global
while test "${#}" -gt '0'; do
	case "${1}" in
		( '-g' \
		| '--g' \
		| '--gl' \
		| '--glo' \
		| '--glob' \
		| '--globa' \
		| '--global' )
			switch_global='TRUE'
			;;
	esac
	shift
done
GLOBAL="${switch_global:-}"

ERRORS="$(
	npm ls --parseable --depth '0' --global 2>&1 > /dev/null \
	| sed -n 's/^npm ERR!/npm-list:/p'
)"
test "${ERRORS}" \
&& printf '%s\n' "${ERRORS}" \
>&2

PACKAGES="$(
	(
		if test "${GLOBAL}"; then
			npm ls --parseable --long --depth '0' --global 2> /dev/null
		else
			npm ls --parseable --long --depth '0' 2> /dev/null
		fi
	) \
	| tail -n '+2' \
	| cut -s -d ':' -f '2'
)"

IFS="$(printf '\n!')"; IFS="${IFS%!}"
for PACKAGE in ${PACKAGES}; do

	NAME="$(printf '%s' "${PACKAGE}" | cut -s -d '@' -f '1')"
	VERSION="$(printf '%s' "${PACKAGE}" | cut -s -d '@' -f '2')"

	printf '%b%s%b:%b %b%s%b\n' \
		"${COLOR_RESET}${COLOR_BOLD}" \
		"${NAME}" \
		"${COLOR_RESET}${COLOR_DIM}" \
		"${COLOR_RESET}" \
		"${COLOR_RESET}${COLOR_DIM}" \
		"${VERSION}" \
		"${COLOR_RESET}"

done