Pass OSC52 from nested tmux session

[moetayuko]

Disclaimer: I'm not sure if this is relevant to #242 or ever under the scope of this project

A common scenario for nested tmux is the outer one on local machine and the inner one on remote machine over ssh:
Terminal emulator -> Local tmux (outer) -> SSH -> Remote tmux (inner) -> Remote CLI applications

However, OSC52 sequence from remote CLI applications cannot reach the terminal emulator. I tested the following:

Workflow	Working?
Terminal emulator -> Local CLI applications	✔️
Terminal emulator -> Local tmux -> Local CLI applications	✔️
Terminal emulator -> SSH -> Remote CLI applications	✔️
Terminal emulator -> SSH -> Remote tmux -> Remote CLI applications	✔️
Terminal emulator -> Local tmux -> SSH -> Remote tmux -> Remote CLI applications	❌

Is it possible to make OSC52 sequence from remote CLI applications "passthrough" remote tmux and reach local machine?

[broander]

You can do this with vanilla tmux and a carefully-crafted .tmux.conf file. Here's the relevant documentation on how you can set up your tmux.conf file to allow this: https://github.com/tmux/tmux/wiki/Clipboard#terminal-support---tmux-inside-tmux

[moetayuko]

You can do this with vanilla tmux and a carefully-crafted .tmux.conf file. Here's the relevant documentation on how you can set up your tmux.conf file to allow this: https://github.com/tmux/tmux/wiki/Clipboard#terminal-support---tmux-inside-tmux

Thanks for the info. It's as simple as adding set -s set-clipboard on to .tmux.conf.local

[gpakosz]

Keeping this open as I want to come up with a solution that works for tmux 2.4+