Option to Copy on select

[kallioaleksi]

Problem or motivation

In iTerm2, I can copy text just by selecting it in the terminal, without pressing cmd+c. I'd like this to be an option in cmux as well, since I've gotten used to it.

Proposed solution

Add an option to toggle "Copy on selection" in the settings

Alternatives considered

No response

Additional context

It should work with double- and triple-clicking as well to select words or paragraphs.

[liusining]

cmux's embedded Ghostty reads ~/.config/ghostty/config, so enabling Ghostty's own copy-on-select is enough — cmux picks it up.

1. Create ~/.config/ghostty/config with:

   copy-on-select = clipboard
   

2. (Optional) verify the bundled binary parsed it:

   /Applications/cmux.app/Contents/Resources/bin/ghostty +show-config | grep copy-on-select
   

3. Reload cmux config (⌘+⇧+,).

After that, mouse selection (including double/triple-click) auto-copies to the system clipboard — matches the iTerm2 behavior described in the OP.

[jinchenma94]

cmux's embedded Ghostty reads ~/.config/ghostty/config, so enabling Ghostty's own copy-on-select is enough — cmux picks it up.

1. Create ~/.config/ghostty/config with:

   copy-on-select = clipboard
   

2. (Optional) verify the bundled binary parsed it:

   /Applications/cmux.app/Contents/Resources/bin/ghostty +show-config | grep copy-on-select
   

3. Reload cmux config (⌘+⇧+,).

After that, mouse selection (including double/triple-click) auto-copies to the system clipboard — matches the iTerm2 behavior described in the OP.

It worked, thanks!

[drakulavich]

@liusining thank you for sharing!