;;; url-nfs.el --- NFS URL interface

;; Copyright (C) 1996-1999, 2004-2017 Free Software Foundation, Inc.

;; Keywords: comm, data, processes

;; This file is part of GNU Emacs.
;;
;; GNU 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 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:

(require 'url-parse)
(require 'url-file)

(defcustom url-nfs-automounter-directory-spec "file:/net/%h%f"
  "How to invoke the NFS automounter.  Certain % sequences are recognized.

%h -- the hostname of the NFS server
%n -- the port # of the NFS server
%u -- the username to use to authenticate
%p -- the password to use to authenticate
%f -- the filename on the remote server
%% -- a literal %

Each can be used any number of times."
  :group 'url
  :type 'string)

(defun url-nfs-unescape (format host port user pass file)
  (with-current-buffer (get-buffer-create " *nfs-parse*")
    (erase-buffer)
    (insert format)
    (goto-char (point-min))
    (while (re-search-forward "%\\(.\\)" nil t)
       (let ((escape (aref (match-string 1) 0)))
	 (replace-match "" t t)
	 (pcase escape
	   (?% (insert "%"))
	   (?h (insert host))
	   (?n (insert (or port "")))
	   (?u (insert (or user "")))
	   (?p (insert (or pass "")))
	   (?f (insert (or file "/"))))))
    (buffer-string)))

(defun url-nfs-build-filename (url)
  (let* ((host (url-host url))
	 (port (url-port url))
	 (pass (url-password url))
	 (user (url-user url))
	 (file (url-filename url)))
    (url-generic-parse-url
     (url-nfs-unescape url-nfs-automounter-directory-spec
		       host port user pass file))))

(defun url-nfs (url callback cbargs)
  (url-file (url-nfs-build-filename url) callback cbargs))

(defmacro url-nfs-create-wrapper (method args)
  `(defun ,(intern (format "url-nfs-%s" method)) ,args
     ,(format "NFS URL wrapper around `%s' call." method)
     (setq url (url-nfs-build-filename url))
     (and url (,(intern (format "url-file-%s" method))
	       ,@(remove '&rest (remove '&optional args))))))

(url-nfs-create-wrapper file-exists-p (url))
(url-nfs-create-wrapper file-attributes (url &optional id-format))
(url-nfs-create-wrapper file-symlink-p (url))
(url-nfs-create-wrapper file-readable-p (url))
(url-nfs-create-wrapper file-writable-p (url))
(url-nfs-create-wrapper file-executable-p (url))
(url-nfs-create-wrapper directory-files (url &optional full match nosort))
(url-nfs-create-wrapper file-truename (url &optional counter prev-dirs))

(provide 'url-nfs)

;;; url-nfs.el ends here