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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
;;;
;;; Validate 'etc/news.scm'.
;;;
(use-modules (git)
(guix git)
(guix ui)
(guix channels)
(srfi srfi-26)
(ice-9 match))
;; XXX: These two things are currently private.
(define read-channel-news (@@ (guix channels) read-channel-news))
(define channel-news-entries (cut struct-ref <> 0))
(define (all-the-news directory)
"Return the <channel-news> read from DIRECTORY, a checkout of the 'guix'
channel."
(call-with-input-file (string-append directory "/etc/news.scm")
read-channel-news))
(define (validate-texinfo str type language)
"Parse STR as a Texinfo fragment and raise an error if that fails."
(catch #t
(lambda ()
(texi->plain-text str))
(lambda (key . args)
(print-exception (current-error-port) #f key args)
(report-error (G_ "the Texinfo snippet below is invalid (~a, ~a):~%")
type language)
(display str (current-error-port))
(exit 1))))
(define (validate-news-entry repository entry)
"Validate ENTRY, a <channel-news-entry>, making sure it refers to an
existent commit of REPOSITORY and contains only valid Texinfo."
(catch 'git-error
(lambda ()
(let ((commit (commit-lookup repository
(string->oid
(channel-news-entry-commit entry)))))
(for-each (match-lambda
((language . title)
(validate-texinfo title 'title language)))
(channel-news-entry-title entry))
(for-each (match-lambda
((language . body)
(validate-texinfo body 'body language)))
(channel-news-entry-body entry))))
(lambda (key error . rest)
(if (= GIT_ENOTFOUND (git-error-code error))
(leave (G_ "commit '~a' of entry '~a' does not exist~%")
(channel-news-entry-commit entry)
(channel-news-entry-title entry))
(apply throw key error rest)))))
(let* ((this-directory (dirname (current-filename)))
(top-directory (string-append this-directory "/.."))
(entries (channel-news-entries (all-the-news top-directory))))
(with-repository top-directory repository
(for-each (cut validate-news-entry repository <>)
entries)
(info (G_ "All ~a channel news entries are valid.~%")
(length entries))))
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