keybind = (blank) should restore default keybinds

[mitchellh]

Discussed in #5816

^{Originally posted by levito February 16, 2025}
According to https://ghostty.org/docs/config#syntax, options with empty values should set them to the default. But with keybind =, all keybinds are removed, including the default ones.

Also, according to https://ghostty.org/docs/config#file-location, multiple config files are applied after one another, with the macOS config in ~/Library overwriting the ~/.config one.

With this behavior, I wanted to create two config files to have dotfiles working on both Linux and macOS:

1. ~/.config/ghostty/config with options for both systems and keybinds for Linux
2. ~/Library/Application\ Support/com.mitchellh.ghostty/config should then unset the Linux keybinds with keybinds = and set different ones for macOS

Did I miss anything, or is the current behavior that keybind = removes all keybinds including the default ones a bug?

[mitchellh]

As an implementation note, I think the best way to do this is to pull out all our default keybind setting into a function (if it isn't already, I can't remember) and call that directly from the Keybind parse CLI flags when empty instead of clearing.