angie-conv-image/image-entry.d/99-cleanup-env.envsh

#!/bin/sh

## Angie: unset core variable
unset ANGIE ANGIE_BPF_MAPS

if [ "${IEP_RETAIN_ENV}" = 1 ] ; then
	log_always "NOT removing following variables:"
	sed -E '/^./s,^,  ,' >&2
	echo >&2
else
	__set="$-"
	set +e

	unset __env __env_print
	while read -r __env ; do
		[ -n "${__env}" ] || continue

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

		if [ "${IEP_DEBUG}" = 1 ] ; then
			__env_print="${__env}="$(printenv "${__env}")
			__env_print=$(env printf '%q' "${__env_print}")
			log_always "unsetting variable: ${__env_print}"
		else
			log "unsetting variable: ${__env}"
		fi

		unset "${__env}"
	done
	unset __env __env_print

	[ -z "${__set}" ] || set -"${__set}"
	unset __set
fi <<-EOF
$(
	set +e
	cat /proc/self/environ \
	| sed -zEn '/^([^=]+).*$/s//\1/p' \
	| xargs -0r printf '%q\n' \
	| {
		## retain variables defined in ".core_worker_env" configuration key
		## (if it was specified somewhere in dictionaries - either yaml or json)
		f="${target_root}/j2cfg/core-worker-env.txt"
		[ -s "$f" ] || exec cat
		grep -Fxv -f "$f"
	} \
	| {
		## remove environment variables:
		## 1. variables starting with "NGX" as they are used by configuration templates
		## 2. variables containing "_SERVICE" or "_PORT" as they are came from
		##    container orchestration
		grep -E \
		  -e '^NGX' \
		  -e '_(SERVICE|PORT)' \

	} \
	| sort -uV
)
EOF