tmux.conf

# remap prefix to Control + a
set -g prefix C-a
unbind C-b
bind C-a send-prefix

if "test -d /opt/homebrew/bin" \
  "set-environment -g PATH '/opt/homebrew/bin:/bin:/usr/bin'"

# default to fish
run-shell "if command -v fish >/dev/null 2>&1; then tmux set-option -g default-shell $(command -v fish); else true; fi"

setw -g set-clipboard external

# vim
setw -g mode-keys vi

# Select pane when clicked (also passes through)
set-option -g mouse on
setw -g mouse on

# esc to copy mode
bind Escape copy-mode

# remove delay after pressing escape to avoid vim issues when typing quickly after changing modes
set -sg escape-time 0

unbind K
bind K confirm-before "kill-window"

setw -g automatic-rename

# status bar
set -g status-left-length 85
set -g status-left "working on#[fg=colour135] #S"
set -g window-status-current-format "#[fg=black,bold bg=default]│#[fg=white bg=cyan]#W#[fg=black,bold bg=default]│"
set -g window-status-current-format "#[fg=black,bold bg=default]│#[fg=colour135 bg=black]#W#[fg=black,bold bg=default]│"
set -g status-style bg=default
set -g status-right "#[fg=magenta] #[bg=gray] %b %d %Y %l:%M %p"
set -g status-right '#(gitmux "#{pane_current_path}")'
set -g status-justify centre

# pane borders
set-option -g pane-border-style fg=colour240
set-option -g pane-active-border-style fg=colour135,bold
set-option -g pane-border-lines heavy
set-option -g pane-border-indicators colour
set-option -g pane-border-status top
set-option -g pane-border-format " #P: #{pane_current_command} "

# Set window notifications
setw -g monitor-activity on # changes tab color when activity seen
set -g visual-activity off # don't send message when activity seen

# Note to self:
# to monitor for 30s of silence:
# setw monitor-activity off
# setw monitor-silence 30

# Open panes in #{pane_current_path}
unbind-key c
bind-key c new-window -c "#{pane_current_path}"

# splitting panes
unbind %
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# moving between panes
bind h select-pane -L
bind C-h select-pane -L
bind j select-pane -D
bind C-j select-pane -D
bind k select-pane -U
bind C-k select-pane -U
bind l select-pane -R
bind C-l select-pane -R

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"

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

# resizing panes
bind Down resize-pane -D 10
bind Up resize-pane -U 10
bind Left resize-pane -L 10
bind Right resize-pane -R 10

# resource
bind r source-file ~/.tmux.conf

bind-key -Tcopy-mode-vi 'v' send -X begin-selection
bind-key -Tcopy-mode-vi 'C-v' send -X rectangle-toggle

# provided by tmux-yank
bind-key -Tcopy-mode-vi 'y' send -X copy-selection-and-cancel

# Override 256 with true colour
set-option -ga terminal-overrides ",*256col*:Tc"

# List of plugins
setenv -g TMUX_PLUGIN_MANAGER_PATH "~/.tmux/plugins/"
set -g @tpm_plugins '          \
  laktak/extrakto              \
  tmux-plugins/tpm             \
  tmux-plugins/tmux-copycat    \
  tmux-plugins/tmux-open       \
  tmux-plugins/tmux-sensible   \
  tmux-plugins/tmux-yank       \
  NHDaly/tmux-scroll-copy-mode \
'

# extended key mode (Kitty protocol)
set -g extended-keys on
set -g extended-keys-format csi-u

# tmux-open gives 'o' to open in default program, <C-o> to open in editor
# tmux-copycat gives:
#  - prefix-/ for search,
#  - pf-<C-f> for file search,
#  - pf-<C-g> for git status,
#  - pf-<C-u> for url search
# tmux-sensible sets a bunch of sensible defaults
# tmux-yank gives <y> to copy to clipboard, <S-Y> to copy then paste
# tmux-fpp runs Facebook PathPicker on the tty with pf-<f>

# ensure tpm exists
if 'test ! -d ~/.tmux/plugins/tpm' \
   "run 'git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm && ~/.tmux/plugins/tpm/bin/install_plugins'"

run '~/.tmux/plugins/tmux-sensible/sensible.tmux'
run '~/.tmux/plugins/extrakto/extrakto.tmux'

# Initializes TMUX plugin manager.
# Keep this line at the very bottom of tmux.conf.
run '~/.tmux/plugins/tpm/tpm'