I also just passed up reading all the links you posted, and failed to realize that what I said, was basically the topic of the Simple Module Tutorial, but in far less words. . Mea Culpa, Mea Culpa, Mea Maxima Culpa!. :-)

...Mea Culpa, Mea Culpa, Mea Maxima Culpa!. :-)

I quite liked you description :)

So here is the

zentara package/module tutorial

a package (ZenTara) is inlined with the main source code

zen-pack.pl

#!/usr/bin/perl --
use strict; use warnings;
ZenTara::hello();
ZenTara::goodbye();
exit( 0 );

package ZenTara;
sub hello { print "\nHello\n"; }
sub ZenTara::goodbye  { print "\nGoodbye\n" }
[download]

a module is when you put the package into a separate file

ZenTara.pm , save in current directory or in ... site/lib/ZenTara.pm

package ZenTara;
use strict; use warnings;
sub hello { print "\nHello\n"; }
sub ZenTara::goodbye  { print "\nGoodbye\n" }
1; ## return true
[download]

zen-mod.pl is the perl program that does not inline but instead uses ZenTara

#!/usr/bin/perl --
use strict; use warnings;
use ZenTara;

ZenTara::hello();
ZenTara::goodbye();
exit( 0 );
[download]

less typing by importing functions from ZenTaraE; also making objects

zen-mod-exp.pl imports hello/goodbye from ZenTaraE, also creates an object

#!/usr/bin/perl --
use strict; use warnings;
use ZenTaraE;
hello();
ZenTaraE->new( name => "Bob" )->goodbye();
exit( 0 );
[download]

ZenTaraE.pm uses Exporter to export hello/goodbye by default, and has object constructor "new"

package ZenTaraE;
use strict; use warnings;
require Exporter;
our @ISA = qw/ Exporter /;
our @EXPORT = qw/ hello goodbye /;  # exported by default
sub new {
    my $class = shift;
    return bless { @_ }, $class;
}
sub hello { print "\nHello\n"; }
sub goodbye {
    my( $self ) = @_;
    my $name = eval { $self->{name} }  || '';
    print "\nGoodbye $name\n"
}
1; ## return true
[download]

rip modules apart and insert them directly into your script

zen-mod-exp-inlined.pl inlining comes first before main program with %INC trick to make ZenTaraEI useable

#!/usr/bin/perl --

BEGIN {
    $INC{'ZenTaraEI.pm'} = __FILE__;

package ZenTaraEI;
use strict; use warnings;
require Exporter;
our @ISA = qw/ Exporter /;
our @EXPORT = qw/ hello goodbye /;  # exported by default
sub new {
    my $class = shift;
    return bless { @_ }, $class;
}
sub hello { print "\nHello\n"; }
sub goodbye {
    my( $self ) = @_;
    my $name = eval { $self->{name} }  || '';
    print "\nGoodbye $name\n"
}
1; ## return true


}##########

use strict; use warnings;
use ZenTaraEI;

hello();
ZenTaraEI->new( name => "Bob" )->goodbye();
exit( 0 );
exit( 0 );
[download]

See how they run

$ perl zen-pack.pl

Hello

Goodbye

$ perl zen-mod.pl

Hello

Goodbye

$ perl zen-mod-exp.pl

Hello

Goodbye Bob

$ perl zen-mod-exp-inlined.pl

Hello

Goodbye Bob

$
[download]

For more info see Simple Module Tutorial and perlmod