tmux.conf

# # set fix as default shell
set -g default-command /usr/bin/fish
set -g default-shell /usr/bin/fish

# tmux display things in 256 colors
set -g default-terminal screen-256color

set -g default-path "$PWD"

# automatically renumber tmux windows
set -g renumber-windows on

# unbind default prefix and set it to Ctrl+a
unbind C-b
set -g prefix C-a
bind C-a send-prefix

# for nested tmux sessions
bind-key a send-prefix

# Rather than constraining window size to the maximum size of any client
# connected to the *session*, constrain window size to the maximum size of any
# client connected to *that window*. Much more reasonable.
setw -g aggressive-resize on

# tile all windows
unbind =
bind = select-layout tiled

# make window/pane index start with 1
set -g base-index 1
setw -g pane-base-index 1
set-option -g set-titles on
set-option -g set-titles-string "#T - #W"

# Remove escape delay
set -s escape-time 0

# reload config
bind r source-file ~/.tmux.conf \; display-message "Config reloaded..."

######################
#### Key Bindings ####
######################

# split window and fix path for tmux 1.9
bind n new-window
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# pane movement shortcuts
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

set -g status-bg colour235
set -g status-fg white

# Window switch
# Requires moditications of iTerm 2 key mapping
# See http://unix.stackexchange.com/questions/96884/using-ctrl0-9-to-cycle-between-windows-using-tmux
bind-key -n C-0 select-window -t :0
bind-key -n C-1 select-window -t :1
bind-key -n C-2 select-window -t :2
bind-key -n C-3 select-window -t :3
bind-key -n C-4 select-window -t :4
bind-key -n C-5 select-window -t :5
bind-key -n C-6 select-window -t :6
bind-key -n C-7 select-window -t :7
bind-key -n C-8 select-window -t :8
bind-key -n C-9 select-window -t :9

###########################################################################
# MOUSE MANAGEMENT
# Mouse mode is on by default.
# <prefix> M -- to turn it off
# <prefix> m -- to turn it on
#
# As of tmux 2.1, a backward-incompatible change was introduced.
# mode-mouse and mouse-* no longer exist, replaced by simply
# mouse <on|off>. Which is great, and easier, but unfortunately I use
# tmux on systems which I don't foresee going to 2.1+ anytime soon.
# So, time to test versions... this is kind of cheap and hacky, and it
# won't work for 2.2 and beyond, but will work for now. I tried to make
# this more generalized but have not been successful so far.
#
if-shell '[[ $(echo "$(tmux -V | cut -d" " -f2) >= 2.1" | bc) -eq 1 ]]' \
    'set -g mouse on; bind m set -g mouse on \; display "Mouse ON"; bind M set -g mouse off \; display "Mouse OFF"' \
    'set -g mode-mouse on; set -g mouse-resize-pane on; set -g mouse-select-pane on; set -g mouse-select-window on; bind m set -g mode-mouse on \; set -g mouse-resize-pane on \; set -g mouse-select-pane on \; set -g mouse-select-window on \; display "Mouse ON"; bind M set -g mode-mouse off \; set -g mouse-resize-pane off \; set -g mouse-select-pane off \; set -g mouse-select-window off \; display "Mouse OFF"'
###########################################################################

# window status bar
set -g status-position bottom
set -g status-bg colour234
set -g status-fg colour137
set -g status-attr dim
set -g status-left ''
set -g status-right-length 50
set -g status-left-length 20

setw -g window-status-current-fg colour81
setw -g window-status-current-bg colour238
setw -g window-status-current-attr bold
setw -g window-status-current-format ' #I#[fg=colour250]:#[fg=colour255]#W#[fg=colour50]#F '

setw -g window-status-fg colour138
setw -g window-status-bg colour235
setw -g window-status-attr none
setw -g window-status-format ' #I#[fg=colour237]:#[fg=colour250]#W#[fg=colour244]#F '

setw -g window-status-bell-attr bold
setw -g window-status-bell-fg colour255
setw -g window-status-bell-bg colour1