May 2006
Beginner
298 pages
6h 51m
English
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Hack #32. Manage Module Installations
Bundle up required modules to make installations easier.
Embracing the Perl way means taking advantage of the CPAN when possible. There are thousands of reusable, easily installable modules that do almost anything you can imagine—including making your coding life much easier and simpler.
Some day you'll have to distribute your software, upgrade Perl, or do something else that means that you can't rely on having all of your existing modules available. Never fear; just create a bundle that the CPAN module can use to install all of the necessary modules for you!
The Hack
The CPAN module doesn't only download and install modules. It can also give you a catalog of what you have installed on your system. The autobundle command takes this list and writes it to a bundle file—a very simple, mostly POD module that CPAN can use later (or elsewhere) to install necessary modules.
Tip
If you only support one application, you can use a technique such as in "Trace All Used Modules" [Hack #74] to figure out everything you need to install.
All you have to do is launch the shell, issue the autobundle command, and note where it creates the bundle file:
$cpancpan shell -- CPAN exploration and modules installation (v1.7601) ReadLine support enabled cpan>autobundle# time passes... Wrote bundle file /usr/src/.cpan/Bundle/Snapshot_2005_11_13_00.pm
Running the Hack
Copy or move the bundle file from its current location. Then when you upgrade or reinstall Perl, or when ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.