.tmux.conf

# remap prefix from 'C-b' to 'C-a'
unbind C-b
set -g prefix C-a
bind C-a send-prefix

# split panes with | and -
bind | split-window -h
bind - split-window -v
unbind '"'
unbind %

# window resize
bind-key -r -T prefix C-h resize-pane -L
bind-key -r -T prefix C-j resize-pane -D
bind-key -r -T prefix C-k resize-pane -U
bind-key -r -T prefix C-l resize-pane -R

# smart pane-switching (Alt + HJKL)
is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
    | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
bind-key -n 'M-h' if-shell "$is_vim" 'send-keys M-h'  'select-pane -L'
bind-key -n 'M-j' if-shell "$is_vim" 'send-keys M-j'  'select-pane -D'
bind-key -n 'M-k' if-shell "$is_vim" 'send-keys M-k'  'select-pane -U'
bind-key -n 'M-l' if-shell "$is_vim" 'send-keys M-l'  'select-pane -R'

# disable escape key as meta key
set -s escape-time 0

# customize appearance
set -g default-terminal "screen-256color"

# vim compatibility
set-window-option -q -g utf8 on
set-window-option -g mode-keys vi

# reload config file with prefix + r
bind r source-file ~/.tmux.conf

# disable automatic window renaming
set-option -g allow-rename off

# scroll back size
set -g history-limit 50000

# local settings
if "test -f ~/.tmux.conf.local" \
    "source-file ~/.tmux.conf.local"

# tmux plugin manager settings
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-resurrect'
set -g @plugin 'jimeh/tmux-themepack'

# Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
run '~/.tmux/plugins/tpm/tpm'