OnlyPerlWillDo has asked for the wisdom of the Perl Monks concerning the following question:

I'm trying to write a perl module, and cannot export my subs. I'm on Ubuntu 12.04 LTS, using Perl v5.14.2 Here's my module, /home/steve/scripts/lib/STEVE/Test.pm: 
package Test;

use strict;
use warnings;
use Exporter;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);

$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = ();
@EXPORT_OK = qw(test);

sub test
{
 print "This is only a drill\n";
}

1;

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(yes, now the world knows my file structure). I constructed it according to this post:

http://www.perlmonks.org/?node_id=102347

My driver program, /home/steve/scripts/test.pl, looks like: 
#!/usr/bin/perl

use lib '/home/steve/scripts/lib';
use STEVE::Test qw(&test);

test();

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As stated, this fails, with error: Undefined subroutine &main::test called at ./test.pl line 6. Why? I used to write modules all the time (on the same OS, but maybe not the same perl version). Did perl change its export/import/package method? Thanks

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Re: Problem With Exporting subs from Modules
by choroba (Cardinal) on Nov 29, 2014 at 09:11 UTC
    If you want to use STEVE::Test, you have to name your module accordingly: 
    package STEVE::Test;
#       ^^^^^^^

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    لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ
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      Well hell, thank you. I swear this was not the case two years ago, though; was it?
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        Oh yes it was! But, you may not have put Test in a subdirectory two years ago. The STEVE:: bit is a path prefix to the the package file name. Perl searches its library path for ./STEVE/Text.pm. I picked up Perl around 2005 (5.8.8) and its been like that since then at least.

        Perl is the programming world's equivalent of English
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      Hmm, you don't HAVE to, though it is considered good practice to do so

      Adding import Test 'test'; after the use statement will most likely work equally well

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