tmux configuration

tmux-named

#!/bin/bash

# I alias this script to `mux`:
#   $ alias mux=tmux-named
# Then I tell terminal to automatically attach new windows to my session named "main",
# by setting the preference named "Shells open with" to this command:
#   /path/to/tmux-named main
#
# When working on a particular project, I can jump a session for that project
# by running "mux project-name".

# Set up paths and whatnot
test -e ~/.bashrc && source ~/.bashrc

# We need tmux. Obvs.
if [[ -z `which tmux` ]]; then echo "You need tmux first!"; exit 1; fi

# Named variables are much more flexible
name="$1"

# Make sure we got a session name to create or join
[[ -n "$name" ]] || { echo "Usage: tmux-named [SESSION_NAME]"; exit; }

# Make sure we can run homebrewed tmux
if [[ $PATH != */usr/local/bin* ]]; then export PATH=$PATH:/usr/local/bin; fi


# Make sure there is a 'name' session
tmux has -t "$name" 2> /dev/null || TMUX= tmux new -d -s "$name"

# Calculate the number of the next session
session_number=$(tmux ls -F "#S" | grep "^$name" | wc -l | sed "s/^[ ]*//")
session_name="${name} $session_number"

#echo $session_name

# If this session already exists, a lower number must be missing
while tmux has -t "$session_name" 2> /dev/null; do
  let session_number--
  session_name="${name} $session_number"
done

# Create the new session
TMUX= tmux new-session -d -t "$name" -s "$session_name"

# Tell this session to die when the window containing it is closed
die="set-option -q -t $session_name destroy-unattached on"

if [ -z $TMUX ]; then
  # Join the new and configured session
  tmux $die \; attach-session -t "$session_name"
else
  # Switch this tmux client to the new session
  tmux $die \; switch-client -t "$session_name"
fi

tmux.conf

# change tmux prefix from ⌃b to ⌃t
unbind C-b
set -g prefix C-t

# tell tmux that terminal has 256 colors
set -g default-terminal "screen-256color"

# re-enable pbcopy and pbpaste inside tmux shells
set-option -g default-command "reattach-to-user-namespace -l bash"

# Use vim keybindings in copy mode
setw -g mode-keys vi

# Setup 'v' to begin selection as in Vim
bind-key -t vi-copy v begin-selection
bind-key -t vi-copy y copy-pipe "reattach-to-user-namespace pbcopy"

# Update default binding of `Enter` to also use copy-pipe
unbind -t vi-copy Enter
bind-key -t vi-copy Enter copy-pipe "reattach-to-user-namespace pbcopy"

# keep 10k lines of scrollback
set -g history-limit 100000

# refresh tmux config with ⌃t R
bind R source-file ~/.tmux.conf \; display-message "Config reloaded..."

# window titles
set -g set-titles on
set-window-option -g automatic-rename on

# disable escape sequence delay
set -sg escape-time 0

# start window numbering at 1
set -g base-index 1

# resize whenever possible
setw -g aggressive-resize on

# act like vim
setw -g mode-keys vi
bind-key | split-window -h
bind-key - split-window
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R
bind-key -r C-h select-window -t :-
bind-key -r C-l select-window -t :+

# allow scrollback in Terminal
set -g terminal-overrides 'xterm*:smcup@:rmcup@'

# enter scrollback mode and scroll up on shift-pageup
bind-key -n M-PPage copy-mode -u

set-window-option -g xterm-keys on # to make ctrl-arrow, etc. work

# status line inspired by wemux from https://gist.github.com/2305333
set -g status-left-length 32
set -g status-right-length 150
set -g status-fg white
set -g status-bg colour234
set -g window-status-activity-attr bold
set -g pane-border-fg colour245
set -g pane-active-border-fg colour39
set -g message-fg colour16
set -g message-bg colour221
set -g message-attr bold
set -g status-left "#[fg=colour235,bg=colour252,bold] ⧉ #S #[fg=colour252,bg=colour235,nobold]⮀"
set -g window-status-format "#[fg=white,bg=colour234] #I #W"
set -g window-status-current-format "#[fg=colour234,bg=colour39]⮀#[fg=colour18,bg=colour39,noreverse,bold] #I ⮁ #W #[fg=colour39,bg=colour234,nobold]⮀"
set -g status-right " #[fg=colour238,bg=colour234]⮂#[fg=colour245,bg=colour238,bold,noreverse] #(hostname -s) "

For the record, my terminal windows look like this when newly opened:

For anyone else who tries to do this, the unicode characters don't seem to have made it through. After installing the tmux config and the powerline modified font, my tmux still looked like this:

To fix it, I looked up the font glyphs for the shapes that are supposed to be there:

1. solid right pointing arrow: U+E0B0
2. thin right pointing arrow: U+E0B1
3. solid left pointing arrow: U+E0B2

and then I used those characters to replace the broken characters in the tmux.conf file using the following order:

1, 1, 2, 1, 3

All fixed:

#(hostname -s) is better-written as #h