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Subject: [bug#39258] [PATCH 3/4] gnu: Generate xapian package search index.
Resent-Message-ID: <handler.39258.B39258.158287708921186@debbugs.gnu.org>
From: Pierre Neidhardt <mail@ambrevar.xyz>
References: <20200227204150.30985-1-arunisaac@systemreboot.net>
 <20200227204150.30985-4-arunisaac@systemreboot.net>
Date: Fri, 28 Feb 2020 09:04:39 +0100
In-Reply-To: <20200227204150.30985-4-arunisaac@systemreboot.net> (Arun Isaac's
 message of "Fri, 28 Feb 2020 02:11:49 +0530")
Message-ID: <87k1475e94.fsf@ambrevar.xyz>
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To: Arun Isaac <arunisaac@systemreboot.net>
Cc: ludo@gnu.org, 39258@debbugs.gnu.org, zimon.toutoune@gmail.com

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Arun Isaac <arunisaac@systemreboot.net> writes:

> +(define (generate-package-search-index directory)
> +  "Generate under DIRECTORY a xapian index of all the available packages=
."
> +  (define db-path
> +    (string-append directory %package-search-index))
> +
> +  (mkdir-p (dirname db-path))
> +  (call-with-writable-database db-path
> +    (lambda (db)
> +      (fold-packages (lambda (package _)
> +                       (let* ((idterm (string-append "Q" (package-name p=
ackage)))
> +                              (doc (make-document #:data (package-name p=
ackage)
> +                                                  #:terms `((,idterm . 0=
))))
> +                              (term-generator (make-term-generator #:ste=
m (make-stem "en")
> +                                                                   #:doc=
ument doc)))
> +                         (index-text! term-generator (package-descriptio=
n package))
> +                         (replace-document! db idterm doc)))

I guess these non-functional functions (index-text!, replace-document!)
represent how Xapian works at the C++ level.  Would it be possible to
make more functional bindings nonetheless?

=2D-=20
Pierre Neidhardt
https://ambrevar.xyz/

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