[BUG] SSH_TTY is wrong with Tramp

[whhone]

Describe the bug

To Reproduce
Steps to reproduce the behavior:

0. Over SSH, inside a tmux session, open Emacs
1. Open a buffer with Tramp e.g. (find-file "/sudo:root@localhost:/tmp/testing.txt")
2. Copy some text from the Tramp buffer
3. No text is copied to the system clipboard.

Expected behavior
The text is copied to the system clipboard.

** System Info (please complete the following information):**

• OS: Linux
• Emacs Version: 29
• Any terminal multiplexers in play: Tmux
• Local or remote (over SSH): Remote over SSH

Analysis
While under tramp, tmux show-environment is executed as a different user.

I can fix it by setting the default-directory to a non-tramp one to get it works.

Here is my fix:

(defun my/with-default-directory-local (orig-fun &rest args)
  (let ((default-directory user-emacs-directory))
    (apply orig-fun args)))

(advice-add 'clipetty--get-tmux-ssh-tty :around #'my/with-default-directory-local)