[rspec-devel] discovering rails version

[Brandon Keepers]

On Apr 22, 2007, at 1:33 AM, David Chelimsky wrote:

> Hi all,
>
> Edge rails has been using new template extensions (.erb instead of
> .rhtml), which means that Spec::Rails' generators need to find out
> what version of rails you are running so it can do the right thing. A
> couple of weeks ago, Rails::VERSION::STRING was returning 1.2.0 in
> edge. Ironically, rspec was able to use that information temporarily
> to distinguish edge from the published versions, since 1.2.0 was
> retracted when 1.2.1 was released.
>
> So I posted a request to rails trac () to change the version number to
> something larger that 1.2.3 so the generator can ask if
> Rails::VERSION::STRING <= 1.2.3 to decide what kind of template to
> generate.
>
> As it turns out, a change to the version was committed in the last few
> days. Unfortunately it was changed to 1.2.3, which means that the real
> 1.2.3 AND edge (the imposter) are both identifying themselves as
> 1.2.3, which means that Spec::Rails' generators can't know to do the
> right thing for edge, which means that rspec:pre_commit fails against
> edge unless you manually change railties/lib/rails/version.rb to say
> 1.2.4. I've done this locally, but since we don't commit rails to
> rspec's svn, if you're doing any work on rspec you'll have to make
> this change locally to get pre_commit to pass edge rails.
>
> So I posted an additional plea (with a patch) to rails trac to make
> the version 1.2.4, but I understand that the rails team is busy and
> don't expect this to be fixed very quickly, if at all.
>
> So - any suggestions as to a different way of determining the rails  
> version?


   ActionView::Base.const_defined? 
('DEFAULT_TEMPLATE_HANDLER_PREFERENCE') &&
     ActionView::Base::DEFAULT_TEMPLATE_HANDLER_PREFERENCE.include? 
('erb')

DEFAULT_TEMPLATE_HANDLER_PREFERENCE was just added a couple weeks  
ago, so it won't help for people on an older version of edge, but it  
at least gives something to go off of.


Brandon