;;; 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))))
an class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-10-30 10:00:35 -0500'>2020-10-30</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=4184998c70f9c4af101feb28cc19c5550abffcec'>guix: pack: Only wrap executable files.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-09-28 21:06:36 -0500'>2020-09-28</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=d8934360d2453a403b5433e71d09188e4ed23b57'>tests: Simplify shell exit status negation;</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-07-28 14:41:05 +0200'>2020-07-28</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=c088aa2988ef82289c87ebfd6d07d8f1464dd8f0'>pack: "fakechroot" engine always creates its store.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-07-28 14:41:04 +0200'>2020-07-28</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=c6c0d5a22c2ee3d7164dab0129b2e4852a4ae76c'>pack: "fakechroot" execution engine can load its audit module.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-07-24 14:21:30 +0200'>2020-07-24</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=a553892215157090ff892dc5cbbe85a25e837260'>pack: '-R' applies to propagated inputs too.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-14 17:21:27 +0200'>2020-05-14</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=6456232164890dbf5aa20394ee24637feb4b7b9e'>pack: Add relocation via ld.so and fakechroot.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-14 17:21:27 +0200'>2020-05-14</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=fde2aec3f498d5ec6db2121d72068e2b203e86cd'>pack: Wrapper honors 'GUIX_EXECUTION_ENGINE' environment variable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-04-24 16:21:13 +0200'>2020-04-24</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=2520059bdb43fa1663ce102f3f4c442d4918c32b'>pack: 'guix pack -R' wrapper correctly reports exit code.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-08-23 18:41:49 +0200'>2019-08-23</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=b908fcd8c02c26b1e6cdc636b63306a01a21b994'>pack: '-R' honors the requested output.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-18 12:23:31 +0200'>2019-05-18</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=baab87ac49e3f0f873e17eb16db9781189b1f2d1'>pack: '--localstatedir' and '-R' tests gracefully handle missing /gnu/store.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-09 17:42:31 +0200'>2019-05-09</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=8deb65c37850bfca36429f3fe5239bd9236f969c'>tests: Ensure 'unshare' works before relying on it.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-15 23:27:59 +0100'>2019-03-15</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=99aec37a78e7be6a591d0e5b7439896d669a75d1'>pack: "-RR" produces PRoot-enabled relocatable binaries.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-06 23:21:24 +0100'>2018-11-06</span></td><td><a href='/guix/commit/tests/guix-pack-relocatable.sh?id=b07014f55ae083f589ea286fca30890a9d705153'>pack: Add test for '--relocatable'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>