diff --git a/lisp/tramp-hack.el b/lisp/tramp-hack.el new file mode 100644 index 0000000..8805235 --- /dev/null +++ b/lisp/tramp-hack.el @@ -0,0 +1,76 @@ +;;; tramp-hack.el --- -*- lexical-binding: t -*- + +;; Copyright (C) 2023 Benson Chu + +;; Author: Benson Chu +;; Created: [2023-07-20 10:01] + +;; This file is not part of GNU Emacs + +;; This program 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. + +;; This program 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 this program. If not, see . + +;;; Commentary: + +;;; Code: + +(advice-add tramp-ssh-controlmaster-options + :override + #'my/tramp-ssh-controlmaster-options) + +(defun my/tramp-ssh-controlmaster-options (vec) + "Return the Control* arguments of the local ssh." + (cond + ;; No options to be computed. + ((or (null tramp-use-connection-share) + (null (assoc "%c" (tramp-get-method-parameter vec 'tramp-login-args)))) + "") + + ;; Use plink option. + ((string-match-p + (rx "plink" (? ".exe") eol) + (tramp-get-method-parameter vec 'tramp-login-program)) + (if (eq tramp-use-connection-share 'suppress) + "-noshare" "-share")) + + ;; There is already a value to be used. + ((and (eq tramp-use-connection-share t) + (stringp tramp-ssh-controlmaster-options)) + tramp-ssh-controlmaster-options) + + ;; We can't auto-compute the options + ((ignore-errors + (not (tramp-ssh-option-exists-p vec "ControlMaster=auto"))) + "") + + ;; Determine the options. + (t (ignore-errors + ;; ControlMaster and ControlPath options are introduced in OpenSSH 3.9. + (concat + "-o ControlMaster=" + (if (eq tramp-use-connection-share 'suppress) + "no" "auto") + + " -o ControlPath=" + (if (eq tramp-use-connection-share 'suppress) + "none" + ;; Hashed tokens are introduced in OpenSSH 6.7. + (if (tramp-ssh-option-exists-p vec "ControlPath=tramp.%C") + "tramp.%%C" "tramp.%%r@%%h:%%p")) + + ;; ControlPersist option is introduced in OpenSSH 5.6. + (when (and (not (eq tramp-use-connection-share 'suppress)) + (tramp-ssh-option-exists-p vec "ControlPersist=no")) + " -o ControlPersist=no")))))) +(provide 'tramp-hack) +;;; tramp-hack.el ends here