GNU bug report logs - #39258
Faster guix search using an sqlite cache

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Message #149 received at 39258 <at> debbugs.gnu.org (full text, mbox):

From: Pierre Neidhardt <mail <at> ambrevar.xyz>
To: Arun Isaac <arunisaac <at> systemreboot.net>, Ludovic Courtès <ludo <at> gnu.org>
Cc: 39258 <at> debbugs.gnu.org, zimon.toutoune <at> gmail.com
Subject: Re: [PATCH v2 0/3] Xapian for Guix package search
Date: Mon, 09 Mar 2020 08:42:17 +0100

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Arun Isaac <arunisaac <at> systemreboot.net> writes:

>> I’m not sufficiently familiar with Xapian’s query language.  The
>> examples I had in mind were:
>> It’s not so much about regexps than it is about selecting individual
>> fields.
>
> I have totally not tested this, but I imagine that equivalent Xapian
> queries might look something like:
>
>>   guix search | recsel -p name -e 'license ~ "LGPL 3"'
>
> guix search license:LGPL3
>
>>   guix search crypto library | \
>>     recsel -e '! (name ~ "^(ghc|perl|python|ruby)")' -p name,synopsis
>
> guix search crypto library AND (NOT ghc) AND (NOT perl) AND (NOT python)
> AND (NOT ruby)

Indeed, if you look at the notmuch-search-terms man page, you'll see
that you can select fields.
In my opinion, the recsel format is fully superseded by Xapian.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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