lisp/gnus/nndir.el

   1 ;;; nndir.el --- single directory newsgroup access for Gnus
   2
   3 ;; Copyright (C) 1995-2018 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Keywords: news
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (require 'nnheader)
  28 (require 'nnmh)
  29 (require 'nnml)
  30 (require 'nnoo)
  31 (eval-when-compile (require 'cl))
  32
  33 (nnoo-declare nndir
  34   nnml nnmh)
  35
  36 (defvoo nndir-directory nil
  37   "Where nndir will look for groups."
  38   nnml-current-directory nnmh-current-directory)
  39
  40 (defvoo nndir-nov-is-evil nil
  41   "*Non-nil means that nndir will never retrieve NOV headers."
  42   nnml-nov-is-evil)
  43
  44 \f
  45
  46 (defvoo nndir-current-group "" nil nnml-current-group nnmh-current-group)
  47 (defvoo nndir-top-directory nil nil nnml-directory nnmh-directory)
  48 (defvoo nndir-get-new-mail nil nil nnml-get-new-mail nnmh-get-new-mail)
  49
  50 (defvoo nndir-status-string "" nil nnmh-status-string)
  51 (defconst nndir-version "nndir 1.0")
  52
  53 \f
  54
  55 ;;; Interface functions.
  56
  57 (nnoo-define-basics nndir)
  58
  59 (deffoo nndir-open-server (server &optional defs)
  60   (setq nndir-directory
  61         (or (cadr (assq 'nndir-directory defs))
  62             server))
  63   (unless (assq 'nndir-directory defs)
  64     (push `(nndir-directory ,server) defs))
  65   (push `(nndir-current-group
  66           ,(file-name-nondirectory (directory-file-name nndir-directory)))
  67         defs)
  68   (push `(nndir-top-directory
  69           ,(file-name-directory (directory-file-name nndir-directory)))
  70         defs)
  71   (nnoo-change-server 'nndir server defs)
  72   (let (err)
  73     (cond
  74      ((not (condition-case arg
  75                (file-exists-p nndir-directory)
  76              (ftp-error (setq err (format "%s" arg)))))
  77       (nndir-close-server)
  78       (nnheader-report
  79        'nndir (or err "No such file or directory: %s" nndir-directory)))
  80      ((not (file-directory-p (file-truename nndir-directory)))
  81       (nndir-close-server)
  82       (nnheader-report 'nndir "Not a directory: %s" nndir-directory))
  83      (t
  84       (nnheader-report 'nndir "Opened server %s using directory %s"
  85                        server nndir-directory)
  86       t))))
  87
  88 (nnoo-map-functions nndir
  89   (nnml-retrieve-headers 0 nndir-current-group 0 0)
  90   (nnml-request-article 0 nndir-current-group 0 0)
  91   (nnmh-request-group nndir-current-group 0 0)
  92   (nnml-close-group nndir-current-group 0)
  93   (nnml-request-list (nnoo-current-server 'nndir)))
  94
  95 (provide 'nndir)
  96
  97 ;;; nndir.el ends here