A perlbrew question

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

O enlightened Perl masters, I lay my humble question at your feet:

Okay, so I have this module, and I have a bug report that says it doesn't install properly if module X isn't installed. Unfortunately, I have module X installed ... in fact, I have several Perls running under perlbrew, and it's installed in every one of them.

So, it occurs to me that all I need to test this is a new Perl, wherein I will install absolutely nothing. Except, it now occurs to me to wonder ... since I already have one or more Perls in my perlbrew, and since all I really want is a Perl with no modules installed, and since it takes forever-and-a-day to build a new Perl, shouldn't there be some sort of way to copy one of my perlbrew Perls without copying all the modules? That's bound to be quicker than building from scratch ... right? (FTM, is it even possible to have two Perls in a perlbrew with the same version?)

The perlbrew docs don't seem to be any help. Is it possible to do what I'm thinking? Or is there a better way to achieve what I want to achieve?

(PS: Yes, I know I will probably spend more time waiting for an answer here than it would take to just build a new Perl, but it's the principle, dammit!)

Comment on A perlbrew question

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Re: A perlbrew question by kcott (Archbishop) on May 30, 2012 at 01:20 UTC
I have 2 Perlbrew installations of v5.14.2 - one with threads; one without. I gave them different names with the `--as` option to the `install` command (see perlbrew). I haven't tried installing exactly identical versions under different names. -- Ken	[reply] [d/l] [select]
Re^2: A perlbrew question by Oberon (Monk) on May 31, 2012 at 22:03 UTC
I gave them different names with the `--as` option to the `install` command ... Ah, the `--as` option ... that's what I was missing. Thx, good tip.	[reply] [d/l] [select]
Re^3: A perlbrew question by kcott (Archbishop) on Jun 01, 2012 at 09:13 UTC
Glad that helped. I just remembered ikegami's perlbrew install wrapper script which you might also find useful. -- Ken	[reply]
Re^4: A perlbrew question by Oberon (Monk) on Jun 02, 2012 at 09:32 UTC
Re: A perlbrew question by ikegami (Patriarch) on May 30, 2012 at 04:24 UTC
Copying an installed Perl won't work. It'll keep looking in the original location. What really takes long is the testing. You can skip it using `-n` aka `--notest`.	[reply] [d/l] [select]
Re^2: A perlbrew question by Oberon (Monk) on May 31, 2012 at 22:05 UTC
What really takes long is the testing. You can skip it using `-n` Aha, another good tip! So, if I really do need to create a parallel perl with the same version, I can just do `perlbrew install -n --as secondperl` or somesuch, and I should be all set. Thanx a bunch everyone!	[reply] [d/l] [select]
Re: A perlbrew question by Anonymous Monk on May 30, 2012 at 01:19 UTC
Uninstall the module cpanp -u Module	[reply]
Re^2: A perlbrew question by Oberon (Monk) on May 31, 2012 at 22:00 UTC
Uninstall the module cpanp -u Module You know, that didn't occur to me, because I've never really used CPANPlus. I looked for an uninstall switch in CPANMinus and didn't find one, so I sort of gave up at that point. But you're absolutely right: `cpanp -u` does the trick neatly, and that totally solves my problem. Thanx!	[reply] [d/l]
Re: A perlbrew question by stuckdownawell (Initiate) on May 30, 2012 at 07:45 UTC
Hi I'm pretty new to perlbrew, so I might be doing something wrong, but here is how I use it. I install a version of Perl with `perlbrew install`, use that version with `perlbrew use`, then for each project / application I am going to use it with, I create a separate library with `perlbrew lib create`. If you `perlbrew list`, then you will see both `perl-version` and `perl-version@project` in the list. To use the library use `perlbrew use perl-version@project`. Now anything you cpan / install, will go into this library rather than the base perlbrew version, keeping things separate. The one gotcha I found is that I now need to do `perlbrew use perlversion`, then `perlbrew use perl-version@project`, to use both the perlbrew version and library combination, but that is not a big issue Again, I am new to perlbrew, so there may well be a better way than this	[reply] [d/l] [select]
Re^2: A perlbrew question by Oberon (Monk) on May 31, 2012 at 22:08 UTC
I install a version of Perl with `perlbrew install`, use that version with `perlbrew use`, then for each project / application I am going to use it with, I create a separate library with `perlbrew lib create` . Hmmm ... I haven't played around with the `lib` command yet. Seems like overkill for what I'm doing here, but I'll check it out. Probably a good thing to know in general.	[reply] [d/l] [select]


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