Failed to bindkey in tmux 3.0 `tmux 3.0: bindkey c-\`

[l-qing]

Hello, great plugin, love it.

REFERENCE: tmux/tmux#1827

The following is a configuration line that is working well on tmux <= 2.9:

bind -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"

In 3.0, it fails to parse near :

.tmux.conf:250: unknown key: C- if-shell

Try this:

bind -n 'C-\' if-shell "$is_vim" "send-keys 'C-\\'" "select-pane -l"

solution:

is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
bind-key -n 'C-\' if-shell "$is_vim" 'send-keys C-\\' 'select-pane -l'
bind-key -T copy-mode-vi 'C-h' select-pane -L
bind-key -T copy-mode-vi 'C-j' select-pane -D
bind-key -T copy-mode-vi 'C-k' select-pane -U
bind-key -T copy-mode-vi 'C-l' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

Can you update the README.md?

[christoomey]

Cutting edge! Thanks for sharing the update. I'm wondering, is the new version that you shared backward compatible?

[l-qing]

Cutting edge! Thanks for sharing the update. I'm wondering, is the new version that you shared backward compatible?

Thanks for your reminder.

I tried it in tmux 2.6, most of them are compatible.
But, only one issue: in vim, Ctrl-\ not work, it insert the -\\

So, I modified it.
Now, it's backward compatible.

The latest script is as follows

is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
if-shell '[ $(echo "$(tmux -V | cut -d" " -f2 | tr -d "[:alpha:]") < 3.0" | bc) -eq 1  ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell '[ $(echo "$(tmux -V | cut -d" " -f2 | tr -d "[:alpha:]") >= 3.0" | bc) -eq 1  ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\' 'select-pane -l'"
bind-key -T copy-mode-vi 'C-h' select-pane -L
bind-key -T copy-mode-vi 'C-j' select-pane -D
bind-key -T copy-mode-vi 'C-k' select-pane -U
bind-key -T copy-mode-vi 'C-l' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

[willfindlay]

Maybe the config in the README should be updated to this backward compatible version

[mikepqr]

I'm having trouble getting ctrl-\ working on tmux 3.0a.

This snippet works on 3.0a (where "works" means ctrl-\ toggles between panes in both vim panes and regular panes)

bind -n 'C-\' if-shell "$is_vim" "send-keys C-\\\\" "select-pane -l"

This works on 2.4

bind -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"

But this snippet (taken from the README) doesn't work on 2.4, in the sense that ctrl-\ doesn't do anything. No error messages either on loading the conf file or when you press ctrl-, but nothing happens either.

tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

Any ideas?

[l-qing]

I'm having trouble getting ctrl-\ working on tmux 3.0a.

This snippet works on 3.0a (where "works" means ctrl-\ toggles between panes in both vim panes and regular panes)

bind -n 'C-\' if-shell "$is_vim" "send-keys C-\\\\" "select-pane -l"

This works on 2.4

bind -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"

But this snippet (taken from the README) doesn't work on 2.4, in the sense that ctrl-\ doesn't do anything. No error messages either on loading the conf file or when you press ctrl-, but nothing happens either.

tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

Any ideas?

This can work for me.
You can try it.

if-shell '[ $(echo "$(tmux -V | cut -d" " -f2 | tr -d "[:alpha:]") < 3.0" | bc) -eq 1  ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell '[ $(echo "$(tmux -V | cut -d" " -f2 | tr -d "[:alpha:]") >= 3.0" | bc) -eq 1  ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\' 'select-pane -l'"

[mikepqr]

Thanks. Same problem: ctrl-\ works inside vim, but not in a regular pane.

[l-qing]

Thanks. Same problem: ctrl-\ works inside vim, but not in a regular pane.

Can you see the key mapping by Ctrl-b + ?
It can show the key Ctrl-\ mapping.
It’s has two mapping for each mode.
You can try to see the different by the each config of tmux.

If possible, update your tmux version .😂

[mikepqr]

I'm trying to construct a config that works for the multiple versions of tmux I see on various servers, so upgrading doesn't help unfortunately.

The leader (ctrl-s in my case) doesn't help (presumably because all these bind-key commands are issued with -n.

I think at this point I've run into a tmux issue (rather than vim-tmux-navigator), so I'll try and get help over there.

Thank you!

[mattolenik]

ctrl-\ is also not working for me when in vim in tmux 3.0a. It works fine in another pane, but it will not work from within a vim pane. I always see Syntax error in the tmux status bar.

If I manually insert send-keys C-\ into tmux, it also prints Syntax error. If I escape the slash and do send-keys C-\\, it works fine.

My config is this:
bind-key -n C-\\ if-shell "$is_vim" 'send-keys C-\\\\' "select-pane -l"

I have tried various combinations for escaping the backslashes in the send-keys bit, but nothing works. I've tried "send-keys C-\\", 'send-keys C-\', 'send-keys C-\\', "send-keys C-\\\\", 'send-keys C-\\\\', nothing seems to work.

EDIT: I updated all my tmux plugins and it seems to work now when using 'send-keys C-\'