#!/bin/sh

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

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

		if is_builtin_module mail "$i" ; then
			log "$i is builtin module, moving to snippets"
			mail_snippets="${mail_snippets}${mail_snippets:+ }$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

	mail_snippets=$(sort_dedup_list "${mail_snippets}")

	set -a
	NGX_MAIL_MODULES="${mail_modules}"
	NGX_MAIL_SNIPPETS="${mail_snippets}"
	set +a

	unset mail_modules mail_snippets
fi