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#+title: Tmux
#+setupfile: headers
#+options: unique-id:t
#+html_head: <meta name="description" content="Phundrak’s Tmux Configuration" />
#+html_head: <meta property="og:title" content="Phundrak’s Tmux Configuration" />
#+html_head: <meta property="og:description" content="Phundrak’s Tmux Configuration Detailed" />
#+property: header-args:tmux :mkdirp yes :lexical t :exports code
#+property: header-args:tmux+ :tangle ~/.config/tmux/tmux.conf
#+property: header-args:tmux+ :mkdirp yes :noweb yes
* Introduction
:PROPERTIES:
:CUSTOM_ID: Introduction-elnbk9c1huj0
:END:
Tmux is one of the widest known terminal multiplexers along with
=screen=. I find it useful when I don’t want to bother with panes in my
[[https://sw.kovidgoyal.net/kitty/][kitty]] terminal.
Be aware this configuration is mostly keybinds.
* Setting sane configurations
:PROPERTIES:
:CUSTOM_ID: Settingsaneconfigurations-7mrbk9c1huj0
:END:
By default, Tmux does not support all the colours your terminal may
support, so we need to tell it to set true colours..
#+begin_src tmux
set-option -sa terminal-overrides ",xterm*:Tc"
#+end_src
We can also tell it to enable mouse support. That way, we will be able
to click on Tmux elements and scroll in its panes!
#+begin_src tmux
set -g mouse on
#+end_src
Finally, I’ll set ~vi-mode~ for some sane movements.
#+begin_src tmux
set-window-option -g mode-keys vi
#+end_src
* Windows and panes configuration
:PROPERTIES:
:CUSTOM_ID: Windowsandpanesconfiguration-nnelqdd1huj0
:END:
Although I agree in computer science most things should begin with
zero, I find it quite weird to see my first window and my first pane
to be labeled with it rather than one. So, let’s pull a Lua on Tmux
and force it to begin with 1 instead of 0.
#+begin_src tmux
set -g base-index 1
set -g pane-base-index 1
set-window-option -g pane-base-index 1
set-option -g renumber-windows on
#+end_src
* Plugins!
:PROPERTIES:
:CUSTOM_ID: Plugins-0550rdd1huj0
:END:
Using [[https://github.com/tmux-plugins/tpm][TPM]], we can use plugins in Tmux! The way I installed it is very simple:
#+begin_src bash
mkdir -p ~/.config/tmux/
git clone https://github.com/tmux-plugins/tpm.git ~/.config/tmux/tpm
#+end_src
Here’s a list of the plugins that I use.
#+name: plugins
| Plugin | Why |
|-----------------------+------------------------------------------------------|
| tpm | TPM itself |
| tmux-sensible | Better defaults I can’t be bothered to change myself |
| tmux-yank | Better copy/pasting |
| tmux-prefix-highlight | Tell me which prefix I’m using |
| nordtheme/tmux | Nord theme for Tmux! |
#+begin_src emacs-lisp :var plugins=plugins[,0] :exports code :wrap src tmux
(mapconcat (lambda (plugin)
(format "set -g @plugin '%s'"
(if (string-match-p (quote "/") plugin)
plugin
(concat "tmux-plugins/" plugin))))
plugins
"\n")
#+end_src
#+RESULTS:
#+begin_src tmux
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-sensible'
set -g @plugin 'tmux-plugins/tmux-yank'
set -g @plugin 'tmux-plugins/tmux-prefix-highlight'
set -g @plugin 'nordtheme/tmux'
#+end_src
Let’s run TPM right after that.
#+begin_src tmux
run '~/.config/tmux/tpm/tpm'
#+end_src
* Keybindings
:PROPERTIES:
:CUSTOM_ID: Keybindings-tx80rdd1huj0
:END:
First of all, I don’t like prefixing all of my keybindings with ~C-b~,
that’s what I use in ~insert-mode~ in Emacs to make the cursor go back.
So instead, let’s set meta with space as my prefix.
#+begin_src tmux
unbind C-b
set -g prefix M-Space
bind M-Space send-prefix
#+end_src
Now, I will only add few keybindings on the root prefix that actually
do something immediately, I will mostly add keybindings that will lead
to other prefixes; I prefer by far to have keychords that are a bit
lengthy and mnemonic than some obscure “ ~C-M-&~ is for doing this and
that”.
#+name: std-prefix
| Keybinding | Command | Prefix to go to |
|------------+------------------+-----------------|
| =«= | select-window -p | |
| =»= | select-window -n | |
| =p= | | pane |
| =y= | | copy-mode |
#+name: gen-keybinds
#+begin_src emacs-lisp :var keybinds=std-prefix :var prefix="prefix" :exports none
(mapconcat (lambda (keybind)
(format "bind-key -T %s %s %s"
prefix
(string-replace "=" "" (car keybind))
(let* ((command (nth 1 keybind))
(command (if (string= "" command) nil command))
(goto-prefix (nth 2 keybind))
(goto-prefix (if (string= "" goto-prefix) nil (concat "switch-client -T " goto-prefix))))
(if (and command goto-prefix)
(concat command "\\; " goto-prefix)
(or command goto-prefix)))))
keybinds
"\n")
#+end_src
#+RESULTS: gen-keybinds
: bind-key -T prefix « select-window -p
: bind-key -T prefix » select-window -n
: bind-key -T prefix p switch-client -T pane
: bind-key -T prefix y switch-client -T copy-mode
#+begin_src tmux
<<gen-keybinds()>>
#+end_src
** Panes
:PROPERTIES:
:CUSTOM_ID: KeybindingsPanes-7z99hld1huj0
:END:
As you will see not only here but also lower, I am not using the usual
=hjkl= to navigate around since I am using the [[https://bepo.fr][bépo]] layout. I use
instead the =ctsr= keys.
Below are the keybindings living in the =pane= prefix. Note that calls to
=split-window= have a =-c "#{pane_current_path}"= argument so new panes
open in the same directory as the directory I am currently in.
#+name: pane-prefix
| Keybinding | Command | Prefix to go to |
|------------+-------------------------------------------+-----------------|
| =/= | split-window -h -c "#{pane-current_path}" | |
| =-= | split-window -v -c "#{pane-current_path}" | |
| =c= | select-panel -L | |
| =t= | select-panel -D | |
| =s= | select-panel -U | |
| =r= | select-panel -R | |
| =.= | | pane-resize |
#+begin_src tmux
<<gen-keybinds(keybinds=pane-prefix, prefix="pane")>>
#+end_src
When it comes to resizing the panes, the keybindings are in their own
prefix referenced above: =pane-resize=. All keybindings will lead to the
same prefix again, which enables the user to type for instance =M-Space
w . r r r r r= in order to call repetitively =resize-pane -R 5=. Hitting
any key that is not part of the current prefix will get us out of it.
#+name: pane-resize-prefix
| Keybinding | Command | Prefix to go to |
|------------+------------------+-----------------|
| c | resize-pane -L 5 | pane-resize |
| t | resize-pane -D 5 | pane-resize |
| s | resize-pane -U 5 | pane-resize |
| r | resize-pane -R 5 | pane-resize |
| C | resize-pane -L | pane-resize |
| T | resize-pane -D | pane-resize |
| S | resize-pane -U | pane-resize |
| R | resize-pane -R | pane-resize |
#+begin_src tmux
<<gen-keybinds(keybinds=pane-resize-prefix, prefix="pane-resize")>>
#+end_src
** Copy in vi mode
:PROPERTIES:
:CUSTOM_ID: KeybindingsCopyinvimode-2mjfpie1huj0
:END:
Tmux has a nice mode for vim keybindings users: =copy-mode-vi= which
allows to move the cursor around in the pane, select some stuff, and
copy it. But first, I need to unbind some keys:
#+begin_src tmux
unbind -T copy-mode-vi H
unbind -T copy-mode-vi J
unbind -T copy-mode-vi K
unbind -T copy-mode-vi L
unbind -T copy-mode-vi h
unbind -T copy-mode-vi j
unbind -T copy-mode-vi k
unbind -T copy-mode-vi l
#+end_src
#+name: copy-mode-vi-prefix
| Keybinding | Command |
|------------+----------------------------------------|
| v | send-keys -X begin-selection |
| C-v | send-keys -X rectangle-toggle |
| y | send-keys -X copy-selection-and-cancel |
| C | send-keys -X top-line |
| J | send-keys -X jump-to-backward |
| S | send-keys -X scroll-up |
| R | send-keys -X bottom-line |
| T | send-keys -X scroll-down |
| c | send-keys -X cursor-left |
| t | send-keys -X cursor-down |
| s | send-keys -X cursor-up |
| r | send-keys -X cursor-right |
#+begin_src tmux
<<gen-keybinds(keybinds=copy-mode-vi-prefix, prefix="copy-mode-vi")>>
#+end_src
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