#!/bin/sh

if [ "${NGX_MAIL}" = 1 ] ; then
	unset mail_modules mail_confload
	mail_modules=
	mail_confload="${NGX_MAIL_CONFLOAD:-}"

	## filter out builtin mail modules
	unset i
	for i in ${NGX_MAIL_MODULES:-} ; do
		[ -n "$i" ] || continue

		case "$i" in
		*/* | *\** | *\?* )
			log_always "module '$i' is not legal, skipping"
			continue
		;;
		esac

		if is_builtin_module mail "$i" ; then
			log "$i is builtin module, moving to NGX_MAIL_CONFLOAD"
			mail_confload="${mail_confload} $i"
			continue
		fi

		## naive deduplication
		case " ${mail_modules} " in
		*" $i "* )
			log "$i is already specified"
			continue
		;;
		esac

		mail_modules="${mail_modules}${mail_modules:+ }$i"
	done
	unset i

	set -a
	NGX_MAIL_MODULES="${mail_modules}"
	NGX_MAIL_CONFLOAD=$(sort_dedup_list "${mail_confload}")
	set +a

	unset mail_modules mail_confload
fi