tmux.conf

setw -g mode-keys vi

# Shorten escape time
set -s escape-time 0

set -g default-terminal "screen-256color"
# Set the default terminal and copy-paste behavior
set -g default-shell $SHELL

# Be explicit about the reattaching of user namespace
set -g default-command "reattach-to-user-namespace -l ${SHELL}"

set -g base-index 1
setw -g pane-base-index 1

unbind C-b
set -g prefix C-a

bind a send-keys C-a
bind C-a last-window

bind | split-window -h
bind - split-window -v

bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R
bind ` select-window -t 0

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

# reload shell configuration
bind-key z send-keys '. ~/.zshrc' Enter \; display-message "~/.zshrc reloaded"

# clear pane
bind C-l send-keys C-l

# Smart pane switching with awareness of vim splits
is_vim='echo "#{pane_current_command}" | grep -iqE "(^|\/)g?(view|n?vim?x?)(diff)?$"'
bind -n C-h if-shell "$is_vim" "send-keys C-h" "select-pane -L"
bind -n C-j if-shell "$is_vim" "send-keys C-j" "select-pane -D"
bind -n C-k if-shell "$is_vim" "send-keys C-k" "select-pane -U"
bind -n C-l if-shell "$is_vim" "send-keys C-l" "select-pane -R"
bind -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"

set-option -g terminal-overrides 'xterm*:XT:Ms=\E]52;%p1%s;%p2%s\007:Cc=\E]12;%p1%s\007:Cr=\E]112\007:Cs=\E]50;CursorShape=%?%p1%{3}%<%t%{0}%e%p1%{2}%-%;%d\007'

# Move between windows
bind -r C-h select-window -t :-
bind -r C-l select-window -t :+

# Search for previous error
bind-key e copy-mode \; send-keys "?Error" C-m

set -sg escape-time 0

# scrollback buffer size increase
set -g history-limit 100000

# Use up and down arrows for temporary "maximize"
unbind Up; bind Up resize-pane -Z; unbind Down; bind Down resize-pane -Z

# Copy/paste interop
bind C-c run "tmux show-buffer | reattach-to-user-namespace pbcopy"
bind C-v run "reattach-to-user-namespace pbpaste | tmux load-buffer - && tmux paste-buffer"

bind -T copy-mode-vi y send-keys -X copy-pipe-and-cancel 'reattach-to-user-namespace pbcopy'
bind -T copy-mode-vi v send-keys -X begin-selection
bind -T copy-mode-vi V send-keys -X rectangle-toggle

# Mouse options for tmux >= 2.1
set-option -g -q mouse on
set-option -g -q mouse on
bind-key -T root WheelUpPane if-shell -F -t = "#{alternate_on}" "send-keys -M" "select-pane -t =; copy-mode -e; send-keys -M"
bind-key -T root WheelDownPane if-shell -F -t = "#{alternate_on}" "send-keys -M" "select-pane -t =; send-keys -M"
bind-key -T copy-mode-vi WheelUpPane send-keys -X halfpage-up
bind-key -T copy-mode-vi WheelDownPane send-keys -X halfpage-down

# Better project name in status bar
set -g status-left-length 18
set -g status-left '#[fg=colour235,bg=colour76,bold] #S '

# Easily resize tmux panes
bind -r H resize-pane -L 10
bind -r J resize-pane -D 10
bind -r K resize-pane -U 10
bind -r L resize-pane -R 10

# ——— Cosmetics ————————————————————————————————————————————————————

set -g status-justify centre
set -g status-bg black

set -g status-left "#[fg=green]#S #[fg=yellow]#I #[fg=cyan]#P"
set -g status-right "#[fg=cyan]%b %d #[fg=yellow]|#[fg=cyan]%l:%M %p"

setw -g window-status-bell-attr default
setw -g window-status-bell-fg red
setw -g window-status-activity-attr bold

setw -g window-status-format "#[fg=cyan]• #[fg=white]#I#[fg=cyan] #[fg=white]#W"
setw -g window-status-current-format "#[fg=red]▶ #[fg=white]#I#[fg=red,bold] #[fg=white]#W"

set -g pane-border-fg colour238
set -g pane-border-bg black
set -g pane-active-border-fg white
set -g pane-active-border-bg black

set -g message-fg white
set -g message-bg black
set -g message-attr bright
# ——— Cosmetics ————————————————————————————————————————————————————

if-shell '[[ -e ~/.tmux.conf.local ]]' 'source-file ~/.tmux.conf.local'