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authorOleg Pykhalov <go.wigust@gmail.com>2018-09-04 02:51:26 +0300
committerOleg Pykhalov <go.wigust@gmail.com>2018-09-26 20:04:53 +0300
commit7c6cb0fbde7c1156fbee91979f5b248f0957a826 (patch)
treeebae29e0b0a7920fb46f0a2ecd91a03f0fb88dc4 /feed/scripts
downloadguile-feed-7c6cb0fbde7c1156fbee91979f5b248f0957a826.tar.gz
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+;;; Guile Feed --- Feed command-line interface.
+;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+;;;
+;;; This file is part of Guile Feed.
+;;;
+;;; Guile Feed 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 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; Guile Feed 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 Feed. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (feed scripts rss)
+ #:use-module (guix scripts)
+ #:use-module (guix ui)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 pretty-print)
+ #:use-module (feed rss)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-26)
+ #:use-module (srfi srfi-37)
+ #:export (feed-rss))
+
+
+;;;
+;;; Command-line options.
+;;;
+
+(define %default-options
+ ;; Alist of default option values.
+ '())
+
+(define %options
+ (list (option '(#\h "help") #f #f
+ (lambda args
+ (show-help)
+ (exit 0)))
+ (option '(#\o "output-file") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'output-file arg result)))
+ (option '(#\s "search") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'search arg result)))
+ (option '("show") #t #t
+ (lambda (opt name arg result)
+ (alist-cons 'show arg result)))))
+
+(define (show-help)
+ (display "Usage: guix rss -o FILE\n")
+ (newline)
+ (display "
+ -h, --help display this help and exit")
+ (display "
+ -V, --version display version information and exit")
+ (display "
+ -o, --output-file=FILE convert rss to LISP FILE")
+ (display "
+ -s, --search=REGEXP search in name and description using REGEXP")
+ (display "
+ --show=RSS show details about RSS")
+ (newline))
+
+
+;;;
+;;; Entry point.
+;;;
+
+(define (feed-rss . args)
+ (define (parse-options)
+ ;; Return the alist of option values.
+ (parse-command-line args %options (list %default-options)
+ #:build-options? #f))
+ (let* ((opts (parse-options))
+ (output (assoc-ref opts 'output-file))
+ (search (assoc-ref opts 'search))
+ (show (assoc-ref opts 'show)))
+ (cond (show
+ (leave-on-EPIPE
+ (for-each (cute feed->recutils <>)
+ (find-feeds-by-name show))))
+ (search
+ (let* ((patterns (filter-map (match-lambda
+ (('search . rx) rx)
+ (_ #f))
+ opts))
+ (regexps (map (cut make-regexp* <> regexp/icase) patterns)))
+ (leave-on-EPIPE
+ (let-values (((rss scores)
+ (find-feeds-by-description regexps)))
+ (for-each (lambda (rss score)
+ (feed->recutils rss
+ #:extra-fields
+ `((relevance . ,score))))
+ rss
+ scores)))
+ #t))
+ (output
+ (with-output-to-file output
+ (lambda _ (pretty-print (feeds->lisp))))))))