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$ cat 1.list.cpan |perl -lpe "s{^}{requires '};s{$}{', 'undef';};" >cp
+anfile
$ cat cpanfile
requires 'App::cpanminus', 'undef';
...
requires 'Perl::Tidy', 'undef';
requires 'YAML', 'undef';
$

$ ./3.cpan_dir.sh 
mkdir: cannot create directory ‘logs’: File exists
...
duration=298
Tue Feb 11 12:37:58 PST 2020
$

#!/usr/bin/perl -w
use 5.016;
use ExtUtils::Installed;
...
      print $module . "\n";
}
__END__