Personally, I would look at splitting the script into two scripts and using the standard Perl installation approach, but I understand if you want to make things as easy as possible for the user.

The standard installation approach would be to list all the modules your program needs in Makefile.PL and then just use cpanm --installdeps . to install all the modules your script needs automatically.

This has the drawback that you need a second file with your script, but the huge advantage that your installation process now also works with cpan and almost all other, and future installation processes for Perl stuff.

A very simplicistic Makefile.PL would look like the following:

#!perl -w
use ExtUtils::MakeMaker;

our %module = (
    NAME                => 'myscript,
    AUTHOR              => q{zidi <zidi@example.com>},
    PREREQ_PM => {
        'strict'     => 0,
        ...
    },
);

if(! caller()) {
    WriteMakefile( %module );
};

1;
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