From: Lea Wiemann <lewiemann@gmail.com>
Date: Wed, 18 Jun 2008 01:25:20 GMT
Subject: Re: [PATCH] gitweb: return correct HTTP status codes
Message-ID: <48586400.4000504@gmail.com>
In-Reply-To: <200806180212.15392.jnareb@gmail.com>

Jakub Narebski wrote:
> Lea Wiemann wrote:
>> $hash = get_hash($symbol, 'commit'); # 'commit' to resolve tags
> 
> Errr... is there equivalent to ^{}, i.e. resolve to non-tag?

Yup.  Haven't quite decided whether to simply use "$symbol^{type}" or 
make type a separate parameter.

> Note that you would have to examine gitweb sources to check if it
> uses href(..., -replay=>1) when it should,

Good point, will do.

> BTW. one of earliest idea was to fully resolve hashes, add missing
> parameters if possible (like 'h', 'hp', 'f') and convert hashes to
> sha-1.  One of intended uses was (weak) ETag for simple HTTP caching.

Interesting.  Something to keep in mind is that using name-rev still can 
wreck with this since it has the unique property of taking hashes but 
still depending on the current refs.  Gitweb isn't using name-rev a lot 
right now, but that might change of course (e.g. I think that it would 
be convenient to always display names along with any commit hashes).

> All the time I think that caching _everything_ is a bad solution.

So?  We can easily add an option to the cache; e.g. no_cache => 
['get_blob', 'ls_tree'].  I doubt that it will be needed, but if it 
does, it's easy to add it.  Don't worry about it, really.

> CHI (or other in recommended thread) for inobtrusive data caching

Thanks for the pointer!  On the one hand CHI is very recent and not even 
in Debian, on the other hand it provides things like busy_lock on top of 
Memcached (AFAICS), at fairly little cost.  I'll look into it.

-- Lea