[Melbourne-pm] CPAN module
Mathew Robertson
mathew.robertson at netratings.com.au
Tue Mar 14 22:22:07 PST 2006
The short answer is maybe... The module(s) themselves are 100% API
compatible, but the implementation is about 20% different.
The main problem with the existing H::T module, is that you cant
strictly** sub-class it. Some of the changes are specifically there so
that sub-classing works correctly.
** Where the definition of strictly in Perl could mean that I could, at
run-time, patch the symbol table so that I could overcome the lack of
sub-classing support. But I would consider this to be a major hack.
Regards,
Mathew
leif.eriksen at hpa.com.au wrote:
>
> That's a good idea, but I don't know if the powers-that--be at CPAN
> will allow it.
>
>
>
> I don't know your code, but do you just add functions, or are you
> changing functions in H::T ?
>
>
>
> What I am driving at is you release your extension with "use base
> qw(HTML::Template);" -- so your package is only your extensions,
> everything else falls back to "default" H::T
>
>
>
> Can you separate your work cleanly from the default H::T ?
>
>
>
>
>
> L
>
>
>
> ------------------------------------------------------------------------
>
> *From:* mathew.robertson at netratings.com.au
> [mailto:mathew.robertson at netratings.com.au]
> *Sent:* Thursday, 9 March 2006 3:00 PM
> *To:* melbourne-pm at pm.org
> *Subject:* Re: [Melbourne-pm] CPAN module
>
>
>
> Correct - and he has every right to make his own decisions.
>
> That said, if I take a leaf from Linux kernel development or the
> Gentoo package tree, I can easily overlay a snapshot branch of any
> package I like, simply by setting an environmental variable. The
> point being that I can happily release my own version of H::T without
> breaking anyone else's version. And I can do this without forking the
> namespace.
>
> Having looked at CPAN module install semantics, I was under the
> impression that it was possible for two independent people to upload
> their modules. Then using the cpan shell, a user could fetch a
> specific developer's version of a package, as in:
>
> cpan> install M/MA/Mathew/HTML-Template-2.8_01.tar.gz
>
> thoughts?
>
> Mathew
>
> leif.eriksen at hpa.com.au <mailto:leif.eriksen at hpa.com.au> wrote:
>
> The decision to create a new namespace has already been made for you by
> the H::T developer - he doesn't want your extra features in his
> namespace, so you need another.
>
> Did he give a reason - I suspect he felt the new features didn't fit
> with his idea of what H::T should do. The doco and design seem to
> indicate they have refined H::T to be exactly what they want.
>
> L
>
> -----Original Message-----
> From: mathew.robertson at netratings.com.au <mailto:mathew.robertson at netratings.com.au>
> [mailto:mathew.robertson at netratings.com.au]
> Sent: Thursday, 9 March 2006 12:32 PM
> To: melbourne-pm at pm.org <mailto:melbourne-pm at pm.org>
> Subject: Re: [Melbourne-pm] CPAN module
>
> hmm... I was hoping there was something more akin to a 'developer tree'
> which would allow updates to a package, but not be part of an
> "official" package.
>
> Scott Penrose wrote:
>
>> On 09/03/2006, at 10:13, Mathew Robertson wrote:
>>
>>
>>> Hi folks,
>>>
>>> I use a CPAN module called HTML::Template, which is used as a
>>>
> web-page
>
>>> templating engine (in a similar vein to Template-Toolkit).
>>>
>>> I have made some changes to increase its functionality - which
>>>
> amounts
>
>>> to about 20% of the code (ie: not a small patch). I have suggested
>>>
> that
>
>>> some of these changes be added to the real module, but the developer
>>> isn't interested.
>>>
>>> Since I dont really want to do a complete fork of the code, as the
>>> existing community is quite lively... The question is, is there a
>>>
> way
>
>>> to release a modified version into CPAN?
>>>
>> No not really, and that would not be fair either - you can't have two
>> bosses of one bit of code.
>>
>> But you have already touched on the answer - fork it and release as a
>> new module.
>>
>> eg:
>>
>> HTML::TemplateX
>>
>> Or maybe
>>
>> HTML::Template::Extended
>>
>> Once you do that - and that is fair and safe - you can then encourage
>> the use of your changes. If the changes are good and acceptable, then
>> people will use that module instead - eventually it will become the
>> standard, and probably even get incorporated or replace the old one.
>>
>> This is not unprecedented - quite common actually :-)
>>
>> Scott
>> --* - * http://www.osdc.com.au - Open Source Developers Conference *
>>
> - *
>
>> Scott Penrose
>> Open source developer
>> http://linux.dd.com.au/
>> scottp at dd.com.au <mailto:scottp at dd.com.au>
>>
>> Dismaimer: Open sauce usually ends up never coming out (of the
>>
> bottle).
>
>> Please do not send me Word or PowerPoint attachments.
>> See http://www.gnu.org/philosophy/no-word-attachments.html
>>
>> Microsoft is not the answer. It's the question. And the answer is no.
>>
>>
>>
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