Ctrl-enter for fish shell

Question

I had tried to create some accept completion and execute right away combination in fish on pressing Ctrl+Enter.

function fish_user_key_bindings
    bind \c\n accept-autosuggestion execute
end

Unfortunately this attempt fails. Looks like fish doesn't like two escaped chars:

#bind -a
...
bind \\c\\n accept-autosuggestion execute

Any better ideas?

Answer 1

Binding ctrl+enter doesn't make any sense. The enter key normally sends a carriage-return; \r, aka \cM. In other words, enter is already a control character. So applying the \c modifier does’t make any sense. In fact, this should cause Fish to generate an error so I’ll open an issue to remind the team to fix that.

Also, you were trying to bind \c\n. Binding \n (aka \cJ) works for Fish 2.2.0 or earlier. But as of 2.3.0 you won’t get the expected result because fish now disables the TTY driver’s icrnl mode. So Fish will receive the \r (aka \cM) character normally sent by the enter key. So you really want to bind \r (or \cM). Of course that doesn’t change the fact that that \c\cM doesn’t make any sense.

Answer 2

Probably you missed only the '' in the bind command line.

Indeed the simple bind \c\n accept-autosuggestion execute generates the error:

bind: Expected zero or two parameters, got 3

Adding '' around the command it seems to works

function fish_user_key_bindings
    bind \c\n 'accept-autosuggestion execute'
end

After the bind command execution with bind -a gives me

bind \x1cn 'accept-autosuggestion execute'