From: Jakub Narebski <jnareb@gmail.com>
Date: Wed, 06 Oct 2010 23:06:30 GMT
Subject: Re: [PATCHv5 08/17] gitweb: Add optional output caching
Message-ID: <201010070106.30864.jnareb@gmail.com>
In-Reply-To: <AANLkTi=RFu5PzBfbF0qVjFnSHnf5GGedkgqKAA4v4nVG@mail.gmail.com>

On Thu, 7 Oct 2010, Ævar Arnfjörð Bjarmason wrote:
> On Wed, Oct 6, 2010 at 22:01, Jakub Narebski <jnareb@gmail.com> wrote:
> 
> > +               $cache ||= 'GitwebCache::SimpleFileCache';
> > +               eval "require $cache";
> 
> Just:
> 
>     eval { require $cache };
> 
> Instead?

Wouldn't work correctly.  We want to use 'require BAREWORD' version,
where BAREWORD is name of module, e.g. GitwebCache::SimpleFileCache,
and which makes Perl to search for GitwebCache/SimpleFileCache.pm
in @INC.

The 'require STRING' version loads file given by a *path*, and it
doesn't do library lookup.

From `perldoc -f require`:

   But if you try this:

      $class = 'Foo::Bar';
      require $class;      # $class is not a bareword
      #or
      require "Foo::Bar";  # not a bareword because of the ""

   The require function will look for the "Foo::Bar" file in the @INC array
   and will complain about not finding "Foo::Bar" there.  In this case you
   can do:

      eval "require $class";


Well, we could insert hooks into @INC, but I don't think we want to use
such hack.

-- 
Jakub Narebski
Poland