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;;; guile-xapian --- Guile bindings for Xapian
;;; Copyright © 2020 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of guile-xapian.
;;;
;;; guile-xapian is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU General Public License as
;;; published by the Free Software Foundation, either version 2 of the
;;; License, or (at your option) any later version.
;;;
;;; guile-xapian is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with guile-xapian. If not, see
;;; <https://www.gnu.org/licenses/>.
(use-modules (ice-9 match)
(srfi srfi-26)
(xapian xapian))
(define (index datapath dbpath)
;; Open database for writing. call-with-writable-database
;; automatically closes the database once we're done.
(call-with-writable-database dbpath
(lambda (db)
(for-each
(lambda (record)
(match record
((description title identifier)
(let* (;; Make a document and tell the term generator to
;; use it. The data of the document is stored for
;; display purposes. Storing data is optional and
;; can be skipped to cut down on database size. The
;; unique idterm ensures each document ends up in
;; the database only once no matter how many times
;; we run the database.
(idterm (string-append "Q" identifier))
(doc (make-document #:data (call-with-output-string (cut write record <>))
#:terms `((,idterm . 0))))
(term-generator (make-term-generator #:stem (make-stem "en")
#:document doc)))
;; Index title and description with a suitable
;; prefix. This is used to allow for searching separate
;; fields as in title:sunwatch, description:leather,
;; etc.
(index-text! term-generator title #:prefix "S")
(index-text! term-generator description #:prefix "XD")
;; Index title and description without prefixes for
;; general search.
(index-text! term-generator title)
(increase-termpos! term-generator)
(index-text! term-generator description)
;; Add the document to the database. The unique idterm
;; ensures each object ends up in the database only once
;; no matter how many times we run the indexer.
(replace-document! db idterm doc)))))
(call-with-input-file datapath read)))))
;; Handle command line arguments
(match (command-line)
((_ datapath dbpath)
(index datapath dbpath))
((program . _)
(format (current-error-port) "Usage: ~a DATAPATH DBPATH~%" program)))
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