[Purdue-pm] Question about Versions

Bradley Andersen bradley.d.andersen at gmail.com
Wed Jul 9 08:39:19 PDT 2014


Pinto??

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On Jul 9, 2014 11:38 AM, "Doug Yatcilla" <yatcilla at purdue.edu> wrote:

> On Wed Jul  9 11:19:31 2014, Dave Jacoby <jacoby.david at gmail.com> wrote:
> > We might go into this deeper on Tuesday (less than a week until the next
> > Perl Mongers meeting! See you at 11:30 in WSLR 116!), but this is an
> issue
> > I'm having.
> >
> > In Javascript, when I include a library I wrote, I put <script
> > src="bulldada_0.1.js"> and if I want to work on the module and make
> > changes, I can do that to bulldada_0.2.js, and I can change the HTML when
> > and if I'm ready to use 0.2. Theoretically, I can have a directory full
> of
> > bulldada_*.*.js.
> >
> > The capabilities are almost there with Perl. I can specify a version in
> my
> > module:
> > package Bull::Dada ;
> > our $VERSION = 0.01 ;
> > 1
> >
> > I can specify a version number in my code;
> > use strict ;
> > use lib '/home/jacoby/lib' ;
> > use Bull::Dada 0.01 ;
> >
> > But, Bull::Dada, as I understand it, has to be
> > /home/jacoby/lib/Bull/Dada.pm. I couldn't have it be
> /home/jacoby/lib/Bull/
> > Dada_0.01.pm alongside Dada_0.02.pm, where I'm changing the subroutines
> > around and such, but I'm not ready to use it in real code, or perhaps it
> > uses OAuth 2.0 while 0.01 uses OAuth 1.0 or whatever.
> >
> > To my knowledge, I cannot do this in Perl, as much as I may desire it.
> Am I
> > wrong?
>
> I, too, would be interested in knowing how to manage multiple versions
> of perl modules in a single Perl installation.  I don't think it is
> easily done though.
>
> Here is an old but probably abandoned attempt:
> http://search.cpan.org/~ingy/only/
>
> The above idea might be feasible for you, though.  Keep different
> module versions in different directories and adjust $PERL5LIB or
> "use lib" path to correspond to the version you want.
>
> I hear some use http://perlbrew.pl/ to keep multiple versions of perl
> (and associated modules) around.  But it seems designed more as a
> single-user solution rather than a system-wide one.
>
> Perl 6 might address this issue:
> http://perl6advent.wordpress.com/2013/12/11/day-11-installing-modules/
>
> -Doug
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