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[bug#39258] [PATCH v2 0/3] Xapian for Guix package search

From: Pierre Neidhardt
Subject: [bug#39258] [PATCH v2 0/3] Xapian for Guix package search
Date: Mon, 09 Mar 2020 08:42:17 +0100

Arun Isaac <address@hidden> 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In my opinion, the recsel format is fully superseded by Xapian.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

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