From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
Subject: Re: Re-approaching package tagging
Date: Thu, 20 Dec 2018 08:53:12 +0100
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To: zimoun <zimon.toutoune@gmail.com>
Cc: Guix Devel <guix-devel@gnu.org>

Hello,

zimoun <zimon.toutoune@gmail.com> skribis:

>> And how the regexp works ?
>> I am not able to find some doc... I am diving in the code but it is
>> not easy to find. :-)
>
> If I understand well, basically the code is here, right?
> http://git.savannah.gnu.org/cgit/guix.git/tree/guix/scripts/package.scm#n=
754
>
> And the regexp engine comes from the module (ice-9 regex), right?
> Documented there:
> https://www.gnu.org/software/guile/manual/html_node/Regular-Expressions.h=
tml#Regular-Expressions

Yes, just plain POSIX regexps.

>> For example, how to search package with the name emacs and not the name =
emacs-
>> or how to search package with the name emacs and with the decription GNU?
>> The '-s foo -s bar' is OR. What about the AND?
>> etc.
>
> This needs more than the actual implementation, right?

Having multiple -s flags makes it an =E2=80=9Cor=E2=80=9D but it influences=
 the
relevance score:

  https://www.gnu.org/software/guix/manual/en/html_node/Invoking-guix-packa=
ge.html#index-searching-for-packages

So if you take the results with the highest score, that=E2=80=99ll probably=
 be
those that match all the regexps.

HTH!

Ludo=E2=80=99.