[ -n "$GROOT" ] && GROOTCMD="--groot $GROOT" || GROOTCMD=''
[ -n "$RELEASE" ] && RELEASECMD="--release $RELEASE" || RELEASECMD=''
[ -n "$MIRROR" ] && MIRRORCMD="--mirror $MIRROR" || MIRRORCMD=''
[ -n "$GROOT" ] && GROOTCMD="--groot $GROOT" || GROOTCMD=''
[ -n "$RELEASE" ] && RELEASECMD="--release $RELEASE" || RELEASECMD=''
[ -n "$MIRROR" ] && MIRRORCMD="--mirror $MIRROR" || MIRRORCMD=''