Add contrib package org-eshell.el

* contrib/lisp/org-eshell.el: New file
* lisp/org.el (org-modules): Add `org-eshell'.

contrib/README

@@ -21,6 +21,7 @@ org-depend.el            --- TODO dependencies for Org-mode
 org-drill.el             --- Self-testing with org-learn
 org-depend.el            --- TODO dependencies for Org-mode
 org-elisp-symbol.el      --- Org links to emacs-lisp symbols
+org-eshell.el            --- Support for links to working directories in eshell
 org-eval.el              --- The <lisp> tag, adapted from Muse
 org-eval-light.el        --- Evaluate in-buffer code on demand
 org-exp-bibtex.el        --- Export citations to LaTeX and HTML

contrib/lisp/org-eshell.el

@@ -0,0 +1,65 @@
+;;; org-eshell.el - Support for links to working directories in eshell
+;; Copyright (C) 2011 Free Software Foundation, Inc.
+;;
+;; Author: Konrad Hinsen <konrad.hinsen AT fastmail.net>
+;; Version: 0.1
+;;
+;; This file is not part of GNU Emacs.
+;;
+;; Emacs 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, or (at your option)
+;; any later version.
+
+;; GNU Emacs 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 Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(require 'org)
+(require 'eshell)
+(require 'esh-mode)
+
+(org-add-link-type "eshell" 'org-eshell-open)
+(add-hook 'org-store-link-functions 'org-eshell-store-link)
+
+(defun org-eshell-open (link)
+  "Switch to am eshell buffer and execute a command line.
+   The link can be just a command line (executed in the default
+   eshell buffer) or a command line prefixed by a buffer name
+   followed by a colon."
+  (let* ((buffer-and-command
+          (if (string-match "\\([A-Za-z0-9-+*]+\\):\\(.*\\)" link)
+            (list (match-string 1 link)
+                  (match-string 2 link))
+            (list eshell-buffer-name link)))
+         (eshell-buffer-name (car buffer-and-command))
+         (command (cadr buffer-and-command)))
+     (if (get-buffer eshell-buffer-name)
+       (switch-to-buffer eshell-buffer-name)
+       (eshell))
+     (end-of-buffer)
+     (eshell-kill-input)
+     (insert command)
+     (eshell-send-input)))
+
+(defun org-eshell-store-link ()
+  "Store a link that, when opened, switches back to the current eshell buffer
+   and the current working directory."
+  (when (eq major-mode 'eshell-mode)
+    (let* ((command (concat "cd " dired-directory))
+           (link  (concat (buffer-name) ":" command)))
+      (org-store-link-props
+       :link (org-make-link "eshell:" link)
+       :description command))))
+  
+
+(provide 'org-eshell)
+
+;;; org-eshell.el ends here

lisp/org.el

@@ -309,6 +309,7 @@ to add the symbol `xyz', and the package must have a call to
 	(const :tag "C  collector:         Collect properties into tables" org-collector)
 	(const :tag "C  depend:            TODO dependencies for Org-mode\n\t\t\t(PARTIALLY OBSOLETE, see built-in dependency support))" org-depend)
 	(const :tag "C  elisp-symbol:      Org-mode links to emacs-lisp symbols" org-elisp-symbol)
+	(const :tag "C  eshell             Support for links to working directories in eshell" org-eshell)
 	(const :tag "C  eval:              Include command output as text" org-eval)
 	(const :tag "C  eval-light:        Evaluate inbuffer-code on demand" org-eval-light)
 	(const :tag "C  expiry:            Expiry mechanism for Org-mode entries" org-expiry)