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
  32 (nnoo-declare nndir
  33   nnml nnmh)
  34
  35 (defvoo nndir-directory nil
  36   "Where nndir will look for groups."
  37   nnml-current-directory nnmh-current-directory)
  38
  39 (defvoo nndir-nov-is-evil nil
  40   "Non-nil means that nndir will never retrieve NOV headers."
  41   nnml-nov-is-evil)
  42
  43 \f
  44
  45 (defvoo nndir-current-group "" nil nnml-current-group nnmh-current-group)
  46 (defvoo nndir-top-directory nil nil nnml-directory nnmh-directory)
  47 (defvoo nndir-get-new-mail nil nil nnml-get-new-mail nnmh-get-new-mail)
  48
  49 (defvoo nndir-status-string "" nil nnmh-status-string)
  50 (defconst nndir-version "nndir 1.0")
  51
  52 \f
  53
  54 ;;; Interface functions.
  55
  56 (nnoo-define-basics nndir)
  57
  58 (deffoo nndir-open-server (server &optional defs)
  59   (setq nndir-directory
  60         (or (cadr (assq 'nndir-directory defs))
  61             server))
  62   (unless (assq 'nndir-directory defs)
  63     (push `(nndir-directory ,server) defs))
  64   (push `(nndir-current-group
  65           ,(file-name-nondirectory (directory-file-name nndir-directory)))
  66         defs)
  67   (push `(nndir-top-directory
  68           ,(file-name-directory (directory-file-name nndir-directory)))
  69         defs)
  70   (nnoo-change-server 'nndir server defs)
  71   (let (err)
  72     (cond
  73      ((not (condition-case arg
  74                (file-exists-p nndir-directory)
  75              (ftp-error (setq err (format "%s" arg)))))
  76       (nndir-close-server)
  77       (nnheader-report
  78        'nndir (or err "No such file or directory: %s" nndir-directory)))
  79      ((not (file-directory-p (file-truename nndir-directory)))
  80       (nndir-close-server)
  81       (nnheader-report 'nndir "Not a directory: %s" nndir-directory))
  82      (t
  83       (nnheader-report 'nndir "Opened server %s using directory %s"
  84                        server nndir-directory)
  85       t))))
  86
  87 (nnoo-map-functions nndir
  88   (nnml-retrieve-headers 0 nndir-current-group 0 0)
  89   (nnml-request-article 0 nndir-current-group 0 0)
  90   (nnmh-request-group nndir-current-group 0 0)
  91   (nnml-close-group nndir-current-group 0)
  92   (nnml-request-list (nnoo-current-server 'nndir)))
  93
  94 (provide 'nndir)
  95
  96 ;;; nndir.el ends here