nixos/tmux.conf

# Reload tmux conf.
unbind r
bind r source-file ~/.tmux.conf\; display "Reloaded conf."

# Set color enabled
set -g default-terminal "screen-256color"
set -ga terminal-overrides ",*256col*,*kitty,alacritty:Tc"
# set-option -sa terminal-overrides ',*256col*,alacritty:RGB'  # TMUX > 3.2 only

# Set escape time to something sensible
set-option -sg escape-time 10

# Enable focus events
set-option -g focus-events on

# Stop automatic window renaming
# set -g set-titles off
# set-window-option -g automatic-rename off
# set-option -g allow-rename off

# Smart pane switching with awareness of Vim splits.
# See: https://github.com/christoomey/vim-tmux-navigator
is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n 'C-h' if-shell "$is_vim" 'send-keys C-h'  'select-pane -L'
bind-key -n 'C-j' if-shell "$is_vim" 'send-keys C-j'  'select-pane -D'
bind-key -n 'C-k' if-shell "$is_vim" 'send-keys C-k'  'select-pane -U'
bind-key -n 'C-l' if-shell "$is_vim" 'send-keys C-l'  'select-pane -R'
tmux_version='$(tmux -V | sed -En "s/^tmux ([0-9]+(.[0-9]+)?).*/\1/p")'
if-shell -b '[ "$(echo "$tmux_version < 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\'  'select-pane -l'"
if-shell -b '[ "$(echo "$tmux_version >= 3.0" | bc)" = 1 ]' \
    "bind-key -n 'C-\\' if-shell \"$is_vim\" 'send-keys C-\\\\'  'select-pane -l'"

bind-key -T copy-mode-vi 'C-h' select-pane -L
bind-key -T copy-mode-vi 'C-j' select-pane -D
bind-key -T copy-mode-vi 'C-k' select-pane -U
bind-key -T copy-mode-vi 'C-l' select-pane -R
bind-key -T copy-mode-vi 'C-\' select-pane -l

setw -g mode-keys vi

# Status bar styling
set -g status-bg colour238
set -g status-fg colour255
set -g status-left '[#S] '

# set the pane border colors
set -g pane-border-style 'fg=colour235,bg=colour238'
set -g pane-active-border-style 'fg=colour75,bg=colour236'