Managing Perl Modules

doug-x07 · Posted: Fri Jan 17, 2003 9:31 pm Post subject: Managing Perl Modules

Here's the situation. I need to have recent versions of perl modules (including certain core ones) installed on my system to be in sync with those I use at work. I've been trying to use the ebuilds to do this but is has finally got on my nerves and I'm trying to find an easier way for managing all my modules with cpan.

My question is how are other people managing this and have they come across any issues? It seems wise to me to recompile all my modules after a version bump. For example on a non gentoo box to upgrade perl I would just make an autobundle or run cpan -r to recompile everything. I don't know how wise an idea it is to do that when running cpan alongside the core perl ebuild. I tried and got freaked when it proposed to install perl-5.7.3 (where did that come from??) It also recompiles all of perl 5.8. I suppose I could trim the bundle somewhat to get round this.

I can't figure out the best way to handle this, if anyone has any thoughts please voice them. Are there any potential issues that I ought to take into account?
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slartibartfasz · Posted: Fri Jan 17, 2003 10:57 pm Post subject:

i use:

doug-x07 · Posted: Fri Jan 17, 2003 11:20 pm Post subject:

rac · Posted: Sat Jan 18, 2003 6:58 am Post subject:

Have you had a look at /usr/bin/g-cpan.pl, included in recent portages? I haven't tried it yet, but it looks like a Portage front-end to CPAN.pm, and it might be of service.
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doug-x07 · Posted: Sat Jan 18, 2003 4:43 pm Post subject:

Rac, I thought you would have something to say on the subject :wink:

I've taken a quick look at /usr/bin/g-cpan.pl. Nice bit of programming to get round the cpan hooks problem. You feed it a perl module name, it then checks your cpan metadata to see if you already have it installed, checks whether an ebuild exists for it already, makes an ebuild if not, then gets it with cpan, does the md5 and runs the generated ebuild.

The big advantage is that this then gets recorded into /var/db/pkg/dev-perl/ so portage becomes aware of what you have installed. However whilst playing around with it I came across several problems. Tried emerging Spread with it and it warns of an unitialised value whilst creating the ebuild and then it can't find the ebuild to be run. Ran Net::Google and it finds the dependencies on Soap::Lite, Test::More and tells me ebuilds already exist (both are installed already though). It then hits Carp which is part of core perl and refuses to run make without the force option and crashes. Tried a few more straightforward modules and did not have any problems and could access them after through portage.

I like the idea of this front-end on cpan as the virtual ebuilds make a great hook between portage and cpan and frees dev-perl for ebuilds that are depended on by other programs. However it does not seem from my quick look to resolve two problems. If I want to upgrade a module version it will seemingly stop as it finds the module already installed. The second potential problem is with recompiling modules, just like modules I install through cpan, libperl_rebuilder does not seem to find the ones installed with g-cpan.

I'll take a longer look at this and see what else can be done. Is anyone else trying this? If you want more details on the subject check out bug 3450. Not too sure what the current status of integration into the emerge command is at the moment. Many thanks to J Robert Ray and Michael Cummings for managing to get so far with this

_________________
#! /usr/bin/perl
if( @first != $succeed ) {
post { $question->forum && eval '$answers' };
try { $again } catch { $problem && $resolve };
bless $posters; }

abhishek · Posted: Thu Feb 20, 2003 12:56 am Post subject:

I'm having trouble using g-cpan.pl. I want to write an ebuild for a perl program, and it depends on some modules not in portage. But when I try and make ebilds for them(sudo g-cpan.pl IO::Socket) it says the package is alreaady installed, which is true, as I indtalled it myself using CPAN. But now how do I get ebuilds for the module?

flickerfly · l33t Joined: 08 Nov 2002 Posts: 677 Location: Lanham, MD

Anyone have a usage or help dialog for this? I keep getting errors and I'm figuring it's related to the fact that I don't know what arguments to give.
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