How to create cpanfile by “perl Makefile.PL”?

# Makefile.PL
use ExtUtils::MakeMaker::CPANfile;

WriteMakefile(
  NAME => 'Foo::Bar',
  AUTHOR => 'A.U.Thor <author@cpan.org>',
);

# cpanfile
requires 'ExtUtils::MakeMaker' => '6.17';
on test => sub {
  requires 'Test::More' => '0.88';
};