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;;; -*- coding: iso-2022-7bit; -*-
;;; tramp-efs.el --- Make EFS a foreign method in Tramp
;; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
;; Author: Kai Gro,A_(Bjohann <kai.grossjohann@gmx.net>
;; Keywords: comm, processes
;; This file 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 2, or (at your option)
;; any later version.
;; This file 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
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; This file provides glue between Tramp and EFS. EFS is hooked into
;; Tramp as a foreign method. Most of this file has been snarfed from
;; tramp-ftp.el, which does the same for Tramp and Ange-FTP.
;;; Code:
(require 'tramp)
;; Avoid byte-compiler warnings.
(eval-when-compile
(byte-compiler-options (warnings (- unused-vars))))
(defvar tramp-efs-method "ftp"
"Name of the method invoking EFS.")
;; The EFS name format is somewhat restricted. EFS assumes that the
;; first pair of parentheses is the user and the second is the host.
;; It assumes that there is one character after the host name, and
;; then the localname part follows. See function `efs-ftp-path' for
;; the code. If the first pair of parentheses doesn't match anything,
;; then it assumes that the user is not given. Therefore, we need to
;; be quite careful with the \(...\) constructs we use in our regexes.
(defvar tramp-efs-method-given nil
"Method tag is given in filename.
To be set in `tramp-efs-file-name-handler'.")
(defvar tramp-efs-method-regexp
(concat tramp-prefix-regexp
(regexp-quote tramp-efs-method)
tramp-postfix-single-method-regexp)
"Regexp indicating method tag.")
(defun tramp-efs-path-regexp ()
"Tramp uses this value for `efs-path-regexp'."
(concat tramp-prefix-regexp
(when tramp-efs-method-given
(concat
(regexp-quote tramp-efs-method)
tramp-postfix-single-method-regexp))
"\\(" tramp-user-regexp tramp-postfix-user-regexp "\\)?"
"\\(" tramp-host-with-port-regexp "\\)"
tramp-postfix-host-regexp
"\\(" tramp-localname-regexp "\\)"))
(defun tramp-efs-path-format-string ()
"Tramp uses this value for `efs-path-format-string'."
(concat tramp-prefix-format
(when tramp-efs-method-given
(concat tramp-efs-method tramp-postfix-single-method-format))
"%s" tramp-postfix-user-format
"%s" tramp-postfix-host-format
"%s"))
(defun tramp-efs-path-format-without-user ()
"Tramp uses this value for `efs-path-format-without-user'."
(concat tramp-prefix-format
(when tramp-efs-method-given
(concat tramp-efs-method tramp-postfix-single-method-format))
"%s" tramp-postfix-host-format
"%s"))
(defun tramp-efs-path-user-at-host-format ()
"Tramp uses this value for `efs-path-user-at-host-format'."
(concat "%s" tramp-postfix-user-format
"%s" tramp-postfix-host-format))
(defun tramp-efs-path-host-format ()
"Tramp uses this value for `efs-path-host-format'."
(concat "%s" tramp-postfix-host-format))
(defun tramp-efs-path-root-regexp ()
"Tramp uses this value for `efs-path-root-regexp'."
(concat tramp-prefix-regexp
(when tramp-efs-method-given
(concat
(regexp-quote tramp-efs-method)
tramp-postfix-single-method-regexp))
"\\(" tramp-user-regexp tramp-postfix-user-regexp "\\)?"
"\\(" tramp-host-with-port-regexp "\\)"
tramp-postfix-host-regexp))
;; Still need to do efs-path-root-short-circuit-regexp.
;; Disable EFS from file-name-handler-alist.
;; There is still an entry for efs-sifn-handler-function
;; in file-name-handler-alist that I don't know how to deal with.
(defun tramp-disable-efs ()
"Turn EFS off.
This is useful for unified remoting. See
`tramp-file-name-structure-unified' and
`tramp-file-name-structure-separate' for details. Requests
suitable for EFS will be forwarded to EFS. Also see the
variables `tramp-efs-method', `tramp-default-method', and
`tramp-default-method-alist'.
This function is not needed in Emacsen which include Tramp, but is
present for backward compatibility."
(let ((a1 (rassq 'efs-file-handler-function
file-name-handler-alist))
(a2 (rassq 'efs-root-handler-function
file-name-handler-alist))
(a3 (rassq 'remote-path-file-handler-function
file-name-handler-alist)))
(setq file-name-handler-alist
(delete a1 (delete a2 (delete a3 file-name-handler-alist))))))
(tramp-disable-efs)
(eval-after-load "efs" '(tramp-disable-efs))
(eval-after-load "efs-fnh" '(tramp-disable-efs))
;; Add EFS method to the method list.
(add-to-list 'tramp-methods (cons tramp-efs-method nil))
;; Add some defaults for `tramp-default-method-alist'
(add-to-list 'tramp-default-method-alist
(list "\\`ftp\\." "" tramp-efs-method))
(add-to-list 'tramp-default-method-alist
(list "" "\\`\\(anonymous\\|ftp\\)\\'" tramp-efs-method))
;; Add all XEmacs download sites to `tramp-default-method-alist'. The settings
;; above should be sufficient, but it's better to make it explicitely.
(when (listp package-get-download-sites)
(mapcar (lambda (x)
(when (listp x)
(add-to-list
'tramp-default-method-alist
(list (concat "\\`" (nth 1 x) "\\'")
"\\`anonymous\\'" tramp-efs-method))))
package-get-download-sites))
;; Add completion function for FTP method.
(unless (memq system-type '(windows-nt))
(tramp-set-completion-function
tramp-efs-method
'((tramp-parse-netrc "~/.netrc"))))
(defun tramp-efs-file-name-handler (operation &rest args)
"Invoke the EFS handler for OPERATION .
First arg specifies the OPERATION, second args is a list of arguments to
pass to the OPERATION . "
(save-match-data
(or (boundp 'efs-path-regexp)
(require 'efs-cu))
;; Check whether the method is given in a filename.
(setq tramp-efs-method-given nil)
(mapcar (lambda (x)
(and (stringp x)
(string-match tramp-efs-method-regexp x)
(setq tramp-efs-method-given t)))
args)
(let ((efs-path-regexp (tramp-efs-path-regexp))
(efs-path-format-string (tramp-efs-path-format-string))
(efs-path-format-without-user (tramp-efs-path-format-without-user))
(efs-path-user-at-host-format (tramp-efs-path-user-at-host-format))
(efs-path-host-format (tramp-efs-path-host-format))
(efs-path-root-regexp (tramp-efs-path-root-regexp)))
(cond
;; If argument is a symlink, `file-directory-p' and
;; `file-exists-p' call the traversed file recursively. So we
;; cannot disable the file-name-handler this case.
((memq operation '(file-directory-p file-exists-p))
(apply 'efs-file-handler-function operation args))
;; Normally, the handlers must be discarded
(t (let* ((inhibit-file-name-handlers
(list 'tramp-file-name-handler
'tramp-completion-file-name-handler
(and (eq inhibit-file-name-operation operation)
inhibit-file-name-handlers)))
(inhibit-file-name-operation operation))
(apply 'efs-file-handler-function operation args)))))))
;; This function is called even in case the filename doesn't fit Tramp
;; syntax (see defadvice of `efs-dired-before-readin' and
;; `efs-set-buffer-mode'). So a syntax check must be performed first;
;; otherwise `tramp-dissect-file-name' returns with an error.
(defun tramp-efs-file-name-p (filename)
"Check if it's a filename that should be forwarded to EFS."
(when (string-match (nth 0 tramp-file-name-structure) filename)
(let ((v (tramp-dissect-file-name filename)))
(string=
(tramp-find-method
(tramp-file-name-multi-method v)
(tramp-file-name-method v)
(tramp-file-name-user v)
(tramp-file-name-host v))
tramp-efs-method))))
(add-to-list 'tramp-foreign-file-name-handler-alist
(cons 'tramp-efs-file-name-p 'tramp-efs-file-name-handler))
;; Deal with other EFS hooks.
;; * dired-before-readin-hook contains efs-dired-before-readin
;; * find-file-hooks contains efs-set-buffer-mode
(defadvice efs-dired-before-readin (around tramp-efs activate)
"Do nothing for non-EFS names."
(when (tramp-efs-file-name-p default-directory)
ad-do-it))
(defadvice efs-set-buffer-mode (around tramp-efs activate)
"Do nothing for non-EFS names."
(when (tramp-efs-file-name-p buffer-file-name)
ad-do-it))
(provide 'tramp-efs)
;;; tramp-efs.el ends here
|
