[pacman-dev] [PATCH 2/3] pacsearch with repo-agnostic coloring

[Pierre Neidhardt]

On 14-01-15 17:03:39, Martti Kühne wrote:
> On Wed, Jan 15, 2014 at 9:50 AM, Allan McRae <allan at archlinux.org> wrote:
> [...]
> >
> >> +     # hash function (x*2+1) is completely arbitrary.
> >> +     my $repohash = $v[0];
> >> +     $repohash =~ s/(.)/ord($1)*2+1/ge;
> >
> > I have very little perl knowledge, so I have no idea what that hash is
> > doing.  Can someone explain to me so I can see if that "hash" is reasonable.
> >
> 
> Replace each character with its [0] ascii index times two plus one?
> 'g' is group regexes, 'e' is eval expressions [1], as to utilize the
> result of the calculation.
> 
> cheers!
> mar77i
> 
> [0] http://perldoc.perl.org/functions/ord.html
> [1] http://stackoverflow.com/questions/6082219/perl-regex-e-eval-modifier-with-s


That's right except for 'g' as you stated in you following mail.
This hash function is a bit hackish though, but I do not think this problem has
any better solution.

* We need to color repo according to their name.
* We want repo to have different colors.
* We have only 6 colors...

So my hash functions makes core, multilib, local, extra and community have
different colors. With different repo names, the hash may return the same color
for all of them.

Any better idea?

-- 
Pierre Neidhardt

Sometimes love ain't nothing but a misunderstanding between two fools.