Subject: Re: [PATCHv7.1 3/4] gitweb: File based caching layer (from git.kernel.org)

From: Jakub Narebski <[email-masked]>
Date: Tue, 30 Nov 2010 00:54:45 +0100

On Tue, 30 Nov 2010, demerphq wrote:
> On 30 November 2010 00:07, demerphq <[email-masked]> wrote:
> > 2010/11/13 Jakub Narebski <[email-masked]>:

> 
> Also in this code:
> 
> 2010/11/28 Jakub Narebski <[email-masked]>:
> > +#
> > +# Includes
> > +#
> > +if (!exists $INC{'cache.pl'}) {
> > +       my $return = do 'cache.pl';
> > +       die $@ if $@;
> > +       die "Couldn't read 'cache.pl': $!" if (!defined $return);
> > +}
> 
> Why is that preferred to:
> 
>    require 'cache.pl';
> 
> And why is this thing even a .pl file? Why isnt it called
> lib/GitWeb/Cache.pm or something like that?

Because it is not a Perl module; in particular 'cache.pl' uses global 
variables from gitweb.perl (like $my_url, or $cachedir, or %action)
and subroutines from gitweb.perl (like change_output() and 
reset_output()).  That is why it needs to be injected via do, rather
than included in its owne namespace with package/require.

P.S. This is not my code, this is patch by J.H. (John Hawley); I did
only *minimal* fixups.

P.P.S. My rewrite can be found in 'gitweb/cache-kernel-pu' branch in
my repository (links are to web interface)
  http://repo.or.cz/w/git/jnareb-git.git
  https://github.com/jnareb/git
Sent in http://thread.gmane.org/gmane.comp.version-control.git/158313

-- 
Jakub Narebski
Poland