#!/bin/sh

__set="$-"
set +e
if [ "${IEP_TRACE}" = 1 ] ; then
	log_always "NOT going to unset following variables:"
	sed -E '/^./s,^,- ,' >&2
else
	unset __env
	while read -r __env ; do
		[ -n "${__env}" ] || continue

		case "${__env}" in
		*\'* )
			log "skipping variable (malformed): ${__env}" >&2
			continue
		;;
		esac

		log "unsetting variable: ${__env}"
		unset "${__env}"
	done
	unset __env
fi <<-EOF
$(
	cat /proc/self/environ \
	| sed -zEn '/^([^=]+).*$/s//\1/p' \
	| xargs -0r printf '%q\n' \
	| {
		f="${target_root}/j2cfg/core-preserve-environment.txt"
		[ -s "$f" ] || exec cat
		grep -Fxv -f "$f"
	} \
	| grep -E \
	  -e '^(NGX|PYTHON)' \
	| sort -uV
)
EOF

[ -z "${__set}" ] || set -"${__set}"
unset __set