lisp/eshell/esh-module.el

   1 ;;; esh-module.el --- Eshell modules  -*- lexical-binding:t -*-
   2
   3 ;; Copyright (C) 1999-2000, 2002-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: John Wiegley <johnw@gnu.org>
   6 ;; Keywords: processes
   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 <http://www.gnu.org/licenses/>.
  22
  23 ;;; Code:
  24
  25 (provide 'esh-module)
  26
  27 (require 'eshell)
  28 (require 'esh-util)
  29
  30 (defgroup eshell-module nil
  31   "The `eshell-module' group is for Eshell extension modules, which
  32 provide optional behavior which the user can enable or disable by
  33 customizing the variable `eshell-modules-list'."
  34   :tag "Extension modules"
  35   :group 'eshell)
  36
  37 ;; load the defgroup's for the standard extension modules, so that
  38 ;; documentation can be provided when the user customize's
  39 ;; `eshell-modules-list'.  We use "(progn (defgroup ..." in each file
  40 ;; to force the autoloader into including the entire defgroup, rather
  41 ;; than an abbreviated version.
  42 (load "esh-groups" nil 'nomessage)
  43
  44 ;;; User Variables:
  45
  46 (defcustom eshell-module-unload-hook
  47   '(eshell-unload-extension-modules)
  48   "A hook run when `eshell-module' is unloaded."
  49   :type 'hook
  50   :group 'eshell-module)
  51
  52 (defcustom eshell-modules-list
  53   '(eshell-alias
  54     eshell-banner
  55     eshell-basic
  56     eshell-cmpl
  57     eshell-dirs
  58     eshell-glob
  59     eshell-hist
  60     eshell-ls
  61     eshell-pred
  62     eshell-prompt
  63     eshell-script
  64     eshell-term
  65     eshell-unix)
  66   "A list of optional add-on modules to be loaded by Eshell.
  67 Changes will only take effect in future Eshell buffers."
  68   :type (append
  69          (list 'set ':tag "Supported modules")
  70          (mapcar
  71           (function
  72            (lambda (modname)
  73              (let ((modsym (intern modname)))
  74                (list 'const
  75                      ':tag (format "%s -- %s" modname
  76                                    (get modsym 'custom-tag))
  77                      ':link (caar (get modsym 'custom-links))
  78                      ':doc (concat "\n" (get modsym 'group-documentation)
  79                                    "\n ")
  80                      modsym))))
  81           (sort (mapcar 'symbol-name
  82                         (eshell-subgroups 'eshell-module))
  83                 'string-lessp))
  84          '((repeat :inline t :tag "Other modules" symbol)))
  85   :group 'eshell-module)
  86
  87 ;;; Code:
  88
  89 (defsubst eshell-using-module (module)
  90   "Return non-nil if a certain Eshell MODULE is in use.
  91 The MODULE should be a symbol corresponding to that module's
  92 customization group.  Example: `eshell-cmpl' for that module."
  93   (memq module eshell-modules-list))
  94
  95 (defun eshell-unload-extension-modules ()
  96   "Unload any memory resident extension modules."
  97   (dolist (module (eshell-subgroups 'eshell-module))
  98     (if (featurep module)
  99         (ignore-errors
 100           (message "Unloading %s..." (symbol-name module))
 101           (unload-feature module)
 102           (message "Unloading %s...done" (symbol-name module))))))
 103
 104 ;;; esh-module.el ends here