Is there any way to split a window in tmux without changing the current focus?
I'm running a script inside one of my tmux panes that occasionally runs "tmux split-window ..." with some command that takes a minute to complete and MAY request input.
I can end up trying to type input into one of the tmux panes but in the middle of my typing, the original pane executes "tmux split-window ..." and (mid word) my cursor shifts to the new pane, and I end up typing part of the input into the wrong pane.
Note: this answer is correct, but obsolete. The right way is to use -d flag for split-window command. I'm leaving this answer as a demonstration how to do some yak shaving with tmux.
A split-window command flag provided by tmux would be the right solution for this. Unfortunately tmux does not provide such command flag. Update: there is a -d split-window flag that does this.
The simple solution is to immediately switch to previous pane after split-window:
tmux split-window
tmux last-pane
This can be also written as a one liner:
tmux split-window\; last-pane
The downside of this solution is that *theoretically* you might end up writing a character in the wrong window if you type it in time interval between split-window and last-pane command execution.
Here another approach with the downside that it's more complex.
Create a new window in the background and get the pane_id of this window (note how this command is wrapped in $(...) because we want it executed in a subprocess:
pane_id=$(tmux new-window -d -P -F "#{pane_id}")
Now join the window we just created with the window where your cursor is located (will not change cursor focus):
tmux join-pane -b -t "$pane_id"
Add -h to the join-pane above if you want a horizontal split.
I recommend taking the first approach for it's simplicity. It's highly unlikely you'll have any practical issues with it.
Related
I often use ^Z to make sleep a process, possibly open a new one, make this one sleep too, and so on, also moving between different Tmux windows.
So what I would like, is that the Tmux status bar update relevantly to indicate me how many processes are sleeping in the currently focused window.
Is that possible?
This is a common question - how to pass information from a shell inside tmux to tmux. The easiest way to do this is to have your shell do it as part of PS1 or some other variable that is evaluated when the prompt is printed.
There are two things you can do:
1) Set a user option with tmux set -w #myoption xyz, then you can use it in the status line with #{#myoption}. This has the disadvantage that it cannot work over ssh.
2) Set the pane title using the escape sequence, for example: printf "\033]2;xyz\033\\". It is then available in #{pane_title}. This works over ssh but had the disadvantage that there is no way to prevent applications also changing the title if they want.
In either case you will only want to run this when TMUX is set, so something like:
[ -n "$TMUX" ] && tmux set -w #myoption $(jobs|wc -l)
Suppose have 3 panes in a tmux window: vim, vom, and vam
I want to access the pane title of the first pane as part of a keyboard mapping (forward command to vim if vim's in pane 1). It wasn't working as expected and I've narrowed it down to the following...
If I run:
tmux display-message "`tmux list-panes -F '#{pane_title}'`"
the result is:
vim
vom
vam
This is what I'd expect. If I try to run the same from a key mapping:
bind -n C-h run "tmux display-message \"`tmux list-panes -F '#{pane_title}'`\""
I get the title of the current pane repeated three times:
vom
vom
vom
Does run-shell execute in a different context or something?
Thanks for your help
Run tmux list-keys in the terminal and see what C-h gets mapped to. I get something like this:
bind-key C-t run-shell "tmux display-message "name1
name2
name3""
From the above, you can see the backtick interpolation happens at the moment when the key is bound, not later when the binding is executed.
I don't know how to get around this and you must be having a lot of pain because of so many nested commands.
Personally, when hacking tmux I always apply the rule of "get to the shell as soon as possible".
For your example that would mean:
keep the key binding simple: bind -n C-h run "/path/to/script.sh"
create a script, make it executable and put the rest of what you want to do in it. This would be its content:
tmux display-message "`tmux list-panes -F '#{pane_title}'\`"
I just did it and it worked for me locally. Hope that helps!
I've been a happy tmux user for a while now but there's one behaviour that's bugging me. When I switch panes using ^b-arrow, and then immediately press arrow-up (to get a command from history, for example), the window pane switches again. I understand this can be useful if you want to move through multiple panes quickly, but for me it's a pain in the backside since I keep ending up in panes I never meant to be in.
So, is there a way to set tmux so that the ^b-arrow command only switches pane once and ignores any following arrow key presses?
That happens because the default bindings for the arrow keys are setup with bind-key -r, specifying that they may be repeated. There are two ways that you can disable this.
First, you can use set-option repeat-time 0 to disable repeating entirely. This will affect all bindings. I find that to be very annoying when resizing panes.
Secondly, you can change the bindings for the arrow keys to use bind-key without the -r option:
bind-key Up select-pane -U
bind-key Down select-pane -D
bind-key Left select-pane -L
bind-key Right select-pane -R
If you spend a lot of times navigating panes, why not set up global mappings so you don't have to use prefixes at all, e.g. bind -n C-h select-pane -L to map ctrl-h to switching left, same as Vim.
See http://robots.thoughtbot.com/seamlessly-navigate-vim-and-tmux-splits for an even better solution that also navigates across Vim windows.
Another option is to make a binding to jump to the previous pane, if you are flicking back and forth between the same two panes.
bind-key C-a last-pane
description of what's happening:
when minimizing a maximized pane, this message appears at bottom of terminal window: "Session not found: tmp"
pane appears to return to same place as initial/previous session
but the new tmp window (that was opened when the pane was first maximized) fails to close and appears in the list of windows (in the status bar at the bottom of tmux)
my hunch is kill-window -t tmp (in the below .tmux.conf code) is where things break. since executing a command in the tmp window appears to rename the window, kill-window -t tmp won't work.
so my question is: how could i alter .tmux.conf to prevent this from happening?
steps to recreate bug:
(note: you would need to have modified .tmux.conf for these commands to work)
start tmux and create session w/ at least two panes
maximize one pane using [prefix] + [up]
execute a shell command in maximized pane (*)
minimize pane using [prefix] + [down]
(*) if pane is maximized and minimized w/out executing a command in the shell this problem does not appear to occur. i.e. if you're editing a file in a pane, then maximize that pane, and only edit/save the file (w/out exiting and then executing another command), then minimize -- the bug doesn't occur.
30s youtube clip showing what happens: http://youtu.be/WMdOeJdOYuU
code that might be causing the error (from ~/.tmux.conf):
unbind Up
bind Up new-window -d -n tmp \; swap-pane -s tmp.0 \; select-window -t tmp
unbind Down
bind Down last-window \; swap-pane -s tmp.0 \; kill-window -t tmp
[edit: HERE IS THE SOLUTION]
thanks to a helpful #tmux irc'er (who has this link and whom i will happily give credit) this question is solved. i don't yet have enough cred to answer this question so i'm posting the solution here.
the solution is to add set-window-option -g allow-rename off to ~/.tmux.conf
this works b/c tmp doesn't get renamed so kill-window -t tmp can properly execute.
(thx for the help and feel free to answer this so i can give you credit!)
You want allow-rename set to off, at least for that one window:
set-window-option -g allow-rename off
Annoying question to have to ask! In bash (or anywhere.. like when editing this question) I can do CTRL + left|right to move left left or right to different bits of whitespace. With tmux running.. this does work.. it doesn't do anything. How do you do the same thing but with tmux?
Thank you.
You can do it by binding C-Left and C-Right to "send-keys M-b" and "send-keys M-f" in your ~/.tmux.conf file like this:
bind-key -n C-Left send-keys M-b
bind-key -n C-Right send-keys M-f
You don't. bash, respectively readline, has an idea of what you typed and can therefore jump as many characters until the next "word boundary". tmux does not have this information. Also, in tmux and the ANSI code space, I would interpret "end of line" in fact as \r\e[xB (with x being the size of the window), though that did not match up with your expectation.