#!/bin/sh

unset core_modules core_snippets
core_modules=
core_snippets="${NGX_CORE_SNIPPETS:-}"

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

	if is_builtin_module core "$i" ; then
		log "$i is builtin module, moving to snippets"
		core_snippets="${core_snippets}${core_snippets:+ }$i"
		continue
	fi

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

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

## sort and remove duplicates
core_snippets=$(sort_dedup_list "${core_snippets}")

set -a
NGX_CORE_MODULES="${core_modules}"
NGX_CORE_SNIPPETS="${core_snippets}"
set +a

unset core_modules core_snippets