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Top Forums Shell Programming and Scripting How to manage several versions of Perl modules during the install? Post 302324773 by genya01 on Thursday 11th of June 2009 06:15:43 PM
Old 06-11-2009
How to manage several versions of Perl modules during the install?

Hello, I would really appreciate any advice on this issue:


My Perl Module Environment:

/usr/lpp/perl/lib/5.8.7 => has the Perl modules that come with the base Perl installation. Comes first in @INC concatination.

/usr/lpp/perl/lib/site_perl/5.8.7 => has all my installed Perl modules that I downloaded from CPAN. Comes last in @INC concatination.

Installation Method: ExtUtils::MakeMaker

Restrictions:
I cannot touch/modify the original Perl installation. This means that I cannot delete any of the pre-installed Perl modules from the /usr/lpp/perl/lib/5.8.7 directory.

My Problem: This is a generic problem, with this specific example:
  • Test::More 0.54 is installed in /usr/lpp/perl/lib/5.8.7
  • Test::More 0.62 is installed in /usr/lpp/perl/lib/site_perl/5.8.7
  • I want to install Email:Abstract 3.001. When I issue the Makefile.PL command, I get this warning:
"Warning: prerequisite Test::More 0.62 not found. We have 0.54."
  • Test::More 0.54 is found first because its library is concativated first in @INC. MakeMaker does not find Test::More 0.62, because the older version was already found.
Question: Can MakeMaker manage several versions of Perl modules during the install?

This is what I found in MakeMaker documentation (ExtUtils::MakeMaker - Create a module Makefile - search.cpan.org):

"Sometimes older versions of the module you're installing live in other directories in @INC. Because Perl loads the first version of a module it finds, not the newest, you might accidentally get one of these older versions even after installing a brand new version. To delete all other versions of the module you're installing (not simply older ones) set the UNINST variable."

Given my restriction of not deleting anything from /usr/lpp/perl/lib/5.8.7, is there a way to indicate to MakeMaker to search through all @INC directories to find the required versions of a Perl Module?

Any suggestions for a workaround?

Thanks a lot!

Genya
 

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Perl::PrereqScanner::Scanner::Perl5(3pm)		User Contributed Perl Documentation		  Perl::PrereqScanner::Scanner::Perl5(3pm)

NAME
Perl::PrereqScanner::Scanner::Perl5 - scan for core Perl 5 language indicators of required modules VERSION
version 1.012 DESCRIPTION
This scanner will look for the following indicators: o plain lines beginning with "use" or "require" in your perl modules and scripts, including minimum perl version o regular inheritance declared with the "base" and "parent" pragmata Since Perl does not allow you to supply a version requirement with a "require" statement, the scanner will check the statement after the "require Module" to see if it is "Module->VERSION( minimum_version );". In order to provide a minimum version, that method call must meet the following requirements: o it must be the very next statement after "require Module". Nothing can separate them but whitespace and comments (and one semicolon). o "Module" must be a bareword, and match the "require" exactly. o "minimum_version" must be a literal number, v-string, or single-quoted string. Double quotes are not allowed. AUTHORS
o Jerome Quelin o Ricardo Signes <rjbs@cpan.org> COPYRIGHT AND LICENSE
This software is copyright (c) 2009 by Jerome Quelin. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-06-27 Perl::PrereqScanner::Scanner::Perl5(3pm)
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