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tmux.conf
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# ==========================
# === General Settings ===
# ==========================
### Global Options ###
set-option -sg default-terminal "screen-256color" # default terminal for new windows; must be 'screen', 'tmux' or derivative
set-option -sa terminal-features[0] ":RGB" # add support for RGB-colour w/ SGR escape-sequences to 'xterm*' (index 0)
set-option -g focus-events on # pass-through requested focus-events to applications running inside tmux (e.g. autoread option in Vim)
set-option -g mouse on # captures & allows mouse events to be bound as key bindings
set-option -g base-index 1 # index to start numbering new windows; matches numbers layout on keyboards
set-option -g history-limit 50000 # maximum number of lines held in window history
set-option -g display-time 1500 # time in ms status line messages are displayed
set-option -g repeat-time 500 # time in ms multiple commands can be entered w/o the prefix-key
set-option -sg escape-time 100 # time in ms tmux waits after an escape is input
set-option -g set-titles on # sets client terminal title using 'tsl' & 'fsl' terminfo(5)
set-option -g status on # show status w/ height of 1 row (default); see own section
set-option -g status-interval 5 # time in sec that status line gets updated
# set-option -g status-keys vi # vi or emacs (default) style key bindings in the status line
# set-option -g renumber-windows on # auto-renumber other windows in numerical order when a window closes
### Window Options ###
set-option -wg clock-mode-colour "colour166" # same as color_main / color_orange
set-option -wg automatic-rename off # when 'on', sets window name using automatic-rename-format
# set-option -wg automatic-rename-format # FORMAT used for automatic-rename when enabled
# ==========================
# === Key Bindings ===
# ==========================
### Prefix Adjustment ###
set-option -g prefix2 C-a # use C-a as a secondary prefix
bind-key C-a send-prefix -2 # sends secondary prefix to window
### Unbind Defaults ###
unbind-key '$' # rename-session
unbind-key , # rename-window
unbind-key "#" # list-buffer
unbind-key = # choose-buffer
unbind-key & # kill-window
unbind-key % # split-window -h
unbind-key '"' # split-window
unbind-key [ # copy-mode
unbind-key ] # paste-buffer
unbind-key '{' # swap-pane -U
unbind-key '}' # swap-pane -D
unbind-key n # next-window
unbind-key p # previous-window
unbind-key r # refresh-client
unbind-key : # command-prompt
unbind-key ';' # last-pane
unbind-key C-o # rotate-window
# unbind-key -a # remove all key bindings
### General Conveniences ###
bind-key C-e new-window -n "tmux.conf" \
"sh -c '\${EDITOR:-nvim} ~/.tmux.conf && tmux source-file ~/.tmux.conf && tmux display \"Edited config reloaded\"'" # Edit config & reload
bind-key C-r source-file ~/.tmux.conf \; display-message "Config reloaded" # Reload tmux config
bind-key ? list-keys # List all key bindings; not just from the default prefix & root keytables (-N option)
bind-key / customize-mode # Browse (& modify) options & key-bindings from a list interactively
bind-key ";" command-prompt -p "β" # Activate command-prompt using ";" instead of ":", just like in Neovim config
bind-key -T root C-c if-shell -F "#{m/r:(buffer|client|tree|options)-mode,#{pane_mode}}" "send-keys q" "send-keys C-c" # Also allow C-c to exit choose & options modes; copy, view & clock modes already exits on C-c
### Session Management ###
bind-key S command-prompt -p "New session w/ name:" "new-session -c $HOME -s '%%'" # Create a new named session
bind-key R command-prompt -p "Rename current session:" "rename-session '%%'" # Manually rename session
### Window Management ###
bind-key c new-window -c "#{pane_current_path}" # Create new window w/ CWD of current pane
bind-key C new-window -c "#{pane_current_path}" -a # Same as prefix-c, but new window will have index of (curr_win_index + 1)
bind-key n new-window -c "#{pane_current_path}" \; command-prompt -I "#{window_name}"\
-p "New window w/ name:" "rename-window '%%'" # Same as prefix-c, then immediately prompt for new name
bind-key X new-window -c "#{pane_current_path}" "/opt/homebrew/bin/xonsh" # Same as prefix-c, but using the Xonsh shell
bind-key N move-window -r # Renumber windows starting w/ base-index
bind-key r command-prompt -I "#{window_name}"\
-p "Rename current window:" "rename-window '%%'" # Manually rename window
bind-key % command-prompt -p "Swap w/ window:" "swap-window -d -t '%%'" # Swap 2 windows while keeping the current view
bind-key $ command-prompt -p "Move current window to:" "move-window -b -t '%%'" # Move active window to new index # TODO: when moving window to new index, conditionally apply -a/-b flag, based on whether the target index already exists
# bind-key ^ command-prompt -p "Link window from (session:window):" \
# "link-window -s %% -a" # Link current window after destination-window # TODO: find use cases for link-window; see https://samm81.github.io/tmux-link-window/
bind-key -r a last-window # TODO: create last-N-windows plugin & use for that
bind-key -r [ previous-window
bind-key -r ] next-window
bind-key -r "{" swap-window -d -t -1 # Moves current window one position to the left
bind-key -r "}" swap-window -d -t +1 # Moves current window one position to the right
### Copy Mode (see own section) ###
bind-key C-c copy-mode # Enter copy mode
bind-key p paste-buffer -p # Insert contents of paste buffer into current pane
bind-key '"' choose-buffer -Z # Interactively choose buffer from list
bind-key = list-buffers # List paste buffers
# ==========================
# === Copy Mode ===
# ==========================
### Options ###
set-option -wg mode-keys vi # Use vi style key bindings in copy mode
### Key (Un)Binds ###
unbind-key -T copy-mode-vi Space # begin-selection
unbind-key -T copy-mode-vi v # toggle-rectangle
bind-key -T copy-mode-vi v send-keys -X begin-selection
bind-key -T copy-mode-vi y send-keys -X copy-selection-and-cancel
bind-key -T copy-mode-vi Y send-keys -X copy-end-of-line-and-cancel
bind-key -T copy-mode-vi C-y send-keys -X copy-line-and-cancel
bind-key -T copy-mode-vi Space send-keys -X rectangle-toggle
# ==========================
# === Theme Definition ===
# ==========================
### Color Variables ###
color_orange="colour166" # 208, 166
color_purple="colour134" # 135, 134
color_green="colour076" # 070
color_blue="colour33"
color_yellow="colour220"
color_red="colour160"
color_black="colour232"
color_white="white" # 015
### Color Components ###
color_dark="$color_black"
color_light="$color_white"
color_session_text="$color_blue"
color_status_text="colour245"
color_main="$color_orange" # NOTE: consider switching-up color_main, e.g. $color_green
color_secondary="$color_purple"
color_level_ok="$color_green"
color_level_warn="$color_yellow"
color_level_stress="$color_red"
color_window_off_status_bg="colour238"
color_window_off_status_current_bg="colour242"
### Special Symbols ###
separator_powerline_left="ξ²"
separator_powerline_right="ξ°"
# ==========================
# === Status Line ===
# ==========================
### Toggling Keybind ###
bind-key -T root -r S-F11 if-shell -F "#{s/off//:status}" "set-option -g status off" "set-option -g status on" # allow status line toggling when local client keybinds are disabled (see Nesting Sessions section)
bind-key -T disabled -r S-F11 if-shell -F "#{s/off//:status}" "set-option -g status off" "set-option -g status on" # NOTE: the 's/foo/bar/:' format conditional (-F) performs substitution, similar to sed's syntax
### General Appearance ###
set-option -g mode-style "fg=$color_light,bg=$color_main" # window modes style (copy, view, choose)
set-option -g status-position top # top or bottom (default)
set-option -g status-justify left # sets position of windows list in status line
set-option -g status-left-length 12 # max length of left component of status line: 10 for the session_name text, 2 for the separator-string ' β±' (default: 10)
set-option -g status-right-length 100 # max length of right component of status line (default: 40)
set-option -g message-style "fg=$color_main,bg=$color_dark" # command-prompt & status line message
set-option -g status-style "fg=$color_status_text,bg=$color_dark" # status line style
### Session Name Truncation ###
session_name_max_len="#{e|-:#{status-left-length},2}" # NOTE: subtract 2 b/c the separator ' β±' has length 2; TODO: dynamically determine the subtracted length given the sep-str
session_name_truncated="#{s/^(.#{a:123}$session_name_max_len#{a:125}).*/#{a:92}1/:session_name}" # ASCII replacements: #{a:92} == \, #{a:123} == {, #{a:125} == }
session_name_ellipsis="#{s/^(.#{a:123}#{e|-:$session_name_max_len,1}#{a:125}).*/#{a:92}1/:session_name}β¦" # subtract 1 for the length of the 'β¦' symbol, and append it to the end of the expanded name-str
session_name_displayed="#{?#{==:#{session_name},$session_name_truncated},#{session_name},${session_name_ellipsis}}"
### Windows List ###
set-option -g window-status-separator "" # separator b/w windows in status line; default is " "
set-option -wg window-status-style "fg=$color_status_text,bg=$color_dark" # inactive windows status style
set-option -wg window-status-current-style "fg=$color_light,bold,bg=$color_main" # like window-status-style, but for active window
set-option -wg window-status-format " #I:#W " # display format of windows on status line; #I=window_index, #W=window_name
set-option -wg window-status-current-format \
"#[fg=$color_dark,bg=$color_main]$separator_powerline_right#[default] #I:#W β #[fg=$color_main,bg=$color_dark]$separator_powerline_right#[default]"
### Config tmux-plugin-sysstat Opts ###
set-option -g @sysstat_cpu_color_low "$color_level_ok"
set-option -g @sysstat_cpu_color_medium "$color_level_warn"
set-option -g @sysstat_cpu_color_stress "$color_level_stress"
set-option -g @sysstat_mem_view_tmpl "Mem:#[fg=#{mem.color}]#{mem.pused}#[default]"
set-option -g @sysstat_mem_color_low "$color_level_ok"
set-option -g @sysstat_mem_color_medium "$color_level_warn"
set-option -g @sysstat_mem_color_stress "$color_level_stress"
set-option -g @sysstat_swap_view_tmpl "Swp:#[fg=#{swap.color}]#{swap.pused}#[default]"
set-option -g @sysstat_swap_color_low "$color_level_ok"
set-option -g @sysstat_swap_color_medium "$color_level_warn"
set-option -g @sysstat_swap_color_stress "$color_level_stress"
load_avg_1min='#(dc -e "2 k [0n]sa $(uptime | rev | cut -d" " -f3 | rev) $(nproc) / d 1 >a p")' # NOTE: see https://en.wikipedia.org/wiki/Load_(computing)
# the same metric as above can be computed using `bc` with: `$ echo "scale=2; l_avg_1min = $(uptime | rev | cut -d' ' -f3 | rev) / $(nproc); if (l_avg_1min < 1) print 0; l_avg_1min" | bc -l`
load_avg_color_heavy="#{?#{e|<:$load_avg_1min,2},$color_level_warn,$color_level_stress}" # colors for when job queue is >=1 and >=2 per core respectively
load_avg_color="#{?#{e|<:$load_avg_1min,1},$color_level_ok,$load_avg_color_heavy}" # text color of the 1min load average stat; TODO: make PR to add colors to sysstat_loadavg in samoshkin/tmux-plugin-sysstat
### Config tmux-battery πOpts ###
set-option -g @batt_icon_status_charged "π"
set-option -g @batt_icon_status_charging "β‘"
set-option -g @batt_icon_status_unknown "β οΈ" # unknown-status only seems to occur when battery is still charging at 99%, before reaching 100%
set-option -g @batt_icon_charge_tier8 "ββ"
set-option -g @batt_icon_charge_tier7 "ββ"
set-option -g @batt_icon_charge_tier6 "ββ"
set-option -g @batt_icon_charge_tier5 "β
β
"
set-option -g @batt_icon_charge_tier4 "ββ"
set-option -g @batt_icon_charge_tier3 "ββ"
set-option -g @batt_icon_charge_tier2 "ββ"
set-option -g @batt_icon_charge_tier1 "ββ"
set-option -g @batt_color_status_primary_charged "$color_green" # same color as color_level_ok
set-option -g @batt_color_status_primary_charging "$color_yellow" # same color as color_level_warn
set-option -g @batt_color_status_primary_unknown "$color_yellow" # same color as color_level_warn
set-option -g @batt_color_charge_primary_tier8 "$color_level_ok" # [95%-100%]
set-option -g @batt_color_charge_primary_tier7 "$color_level_ok" # [80%-95%)
set-option -g @batt_color_charge_primary_tier6 "$color_level_ok" # [65%-80%)
set-option -g @batt_color_charge_primary_tier5 "$color_level_warn" # [50%-65%)
set-option -g @batt_color_charge_primary_tier4 "$color_level_warn" # [35%-50%)
set-option -g @batt_color_charge_primary_tier3 "$color_level_warn" # [20%-35%)
set-option -g @batt_color_charge_primary_tier2 "$color_level_stress" # (5%-20%)
set-option -g @batt_color_charge_primary_tier1 "$color_level_stress" # [0%-5%]
battery_color_bg="#{?#{==:#{client_key_table},disabled},$color_window_off_status_bg,$color_dark}" # set background color for the battery widget based on current key-table
bp="#{battery_percentage}"
battery_pct_lt_100p_format="#{?#{m/r:^[0-9]#{a:37},$bp}, $bp, $bp}" # NOTE: #{a:XYZ} performs decimal ASCII replacement; #{a:37} == %
battery_pct_justified="#{?#{==:$bp,100#{a:37}},$bp,$battery_pct_lt_100p_format}"
### Config tmux-prefix-highlight Opts ###
set-option -g @prefix_highlight_prefix_prompt "Pend"
set-option -g @prefix_highlight_fg "$color_light,bold"
set-option -g @prefix_highlight_bg "$color_main"
set-option -g @prefix_highlight_show_copy_mode "on"
set-option -g @prefix_highlight_copy_prompt "Copy"
set-option -g @prefix_highlight_copy_mode_attr "fg=$color_light,bold,bg=$color_main"
# set-option -g @prefix_highlight_empty_prompt "tmux" # placeholder text when not in any modes; good for permanently aligned widgets
# set-option -g @prefix_highlight_empty_attr "fg=$color_dark,bg=$color_secondary"
# set-option -g @prefix_highlight_empty_has_affixes "on"
### Widget Definitions ###
widget_bracket_L="#[fg=$color_secondary]β±#[default]" # status-right starting separator/delimiter
widget_bracket_R="#[fg=$color_secondary] β°#[default]" # status-right starting separator/delimiter
widget_session="#[fg=$color_session_text]$session_name_displayed#[default]" # formatted & max-length-constrained session-name
widget_bar_sep="#[fg=$color_secondary]|#[default]" # status-right widget components separator/delimiter
widget_dot_sep="#[fg=$color_secondary]β’#[default]" # status-right sysstat widget subcomponents separator/delimiter
widget_date="#[fg=$color_session_text]%a %b %d#[default]" # day-of-week, mon (3-char abbreviation) day-of-month [01-31]
widget_time="#[fg=$color_session_text]%H:%M#[default]" # hr:min (in 24-hr format); NOTE: see `$ man -3 strftime`
# widget_user="#[fg=$color_secondary]#(id -un)#[default]" # user id
# widget_user_host="#[fg=$color_secondary]#(whoami)#[default]@#h" # #h=host_short (no domain)
widget_load_avg_1min="1m:#[fg=$load_avg_color]$load_avg_1min#[default]" # load average over 1min only; instead of 1,5,15 mins as in #{sysstat_loadavg}
widget_sysstat="#{sysstat_cpu} $widget_dot_sep #{sysstat_mem} $widget_dot_sep #{sysstat_swap} $widget_dot_sep $widget_load_avg_1min" # TODO: review calcs (esp. for Apple Silicon CPU) & check issues & review lapsed PRs on GitHub
widget_battery="#{battery_color_fg}#[bg=$battery_color_bg]#{battery_icon}$battery_pct_justified#[default]" # provided by tmux-plugins/tmux-battery
widget_prefix_hl="#{prefix_highlight}" # provided by tmux-plugins/tmux-prefix-highlight
### Status Composition ###
set-option -g status-left "$widget_session $widget_bracket_L" # display string to left of status line
status_R_shared="$widget_bracket_R $widget_sysstat $widget_bar_sep $widget_battery $widget_bar_sep $widget_date" # static segments of the right status line
status_R_dynamic="#{?#{||:#{client_prefix},#{pane_in_mode}},$widget_prefix_hl, $widget_time}" # conditionally swap the end of the right status text, to produce the illusion that the highlighting is overlayed on top of the time
set-option -g status-right "$status_R_shared$status_R_dynamic#[default]" # display string to right of status line
# ==========================
# === Nesting Sessions ===
# ==========================
# Turn off all key-bindings & prefix handling on local session, so all keys are passed to inner/remote
# session. See - https://github.com/tmux/tmux/issues/237 (toggle on/off all keybindings #237)
# Also change status line/windows visual styles to indicate local Tmux handling has been disabled.
### Toggle Local Tmux Off ###
bind-key -T root S-F12 \
set-option prefix None \;\
set-option prefix2 None \;\
set-option key-table disabled \;\
set-option status-style "fg=$color_status_text,bg=$color_window_off_status_bg" \;\
set-option window-status-current-style "fg=$color_dark,bold,bg=$color_window_off_status_current_bg" \;\
set-option window-status-current-format "#[fg=$color_window_off_status_bg,bg=$color_window_off_status_current_bg]$separator_powerline_right#[default] #I:#W β #[fg=$color_window_off_status_current_bg,bg=$color_window_off_status_bg]$separator_powerline_right#[default]" \;\
set-option -g window-status-style "fg=$color_dark,bg=$color_window_off_status_bg" \;\
if-shell -F "#{pane_in_mode}" "send-keys -X cancel" \;\
refresh-client -S
### Toggle Local Tmux On ###
bind-key -T disabled S-F12 \
set-option -u prefix \;\
set-option -u prefix2 \;\
set-option -u key-table \;\
set-option -u status-style \;\
set-option -u window-status-current-style \;\
set-option -u window-status-current-format \;\
set-option -ug window-status-style \;\
refresh-client -S
# ==========================
# === Plugins ===
# ==========================
# NOTE: plugins live in ~/.tmux/plugins/ ;see list of plugins: https://github.com/tmux-plugins/list
set-option -g @plugin "tmux-plugins/tpm" # Tmux Plugin Manager
### Session Persistence ###
set-option -g @plugin "tmux-plugins/tmux-resurrect" # persists tmux environment across system restarts
set-option -g @plugin "tmux-plugins/tmux-continuum" # continuous saving of tmux environment; depends on tmux-resurrect
set-option -g @resurrect-restore "C-o" # default keybind is C-r, which is already used to reload the tmux config
set-option -g @continuum-save-interval "720" # set the save interval to every 12 hours
### Status Indicators ###
set-option -g @plugin "tmux-plugins/tmux-prefix-highlight" # highlights when you press tmux prefix key
set-option -g @plugin "tmux-plugins/tmux-battery" # battery percentage indicator
# set-option -g @plugin "tmux-plugins/tmux-online-status"
set-option -g @plugin "samoshkin/tmux-plugin-sysstat" # prints CPU usage, memory & swap, load average, net I/O metrics
### Internal Enhancements ###
# set-option -g @plugin "tmux-plugins/tmux-copycat" # enhances tmux search
# set-option -g @plugin "jaclu/tmux-menus" # popup menus to help with environment management
# set-option -g @plugin "whame/tmux-modal" # adds modes (like in Vim) for window navigation, management & resize
# set-option -g @plugin "tmux-plugins/tmux-sidebar" # sidebar w/ the directory tree for the current path
# set-option -g @plugin "kiyoon/treemux" # fork of tmux-sidebar
# set-option -g @plugin "ofirgall/tmux-window-name" # smartly names tmux windows; requires Python dependency: libtmux; TODO/FIXME: makes cursor flicker briefly when switching windows
### External Integrations ###
# set-option -g @plugin "christoomey/vim-tmux-navigator" # seamless navigation b/w tmux panes & vim splits
set-option -g @plugin "tmux-plugins/tmux-open" # quickly opens highlighted file or URL
# set-option -g @plugin "trevarj/tmux-open-nvim" # open files in a Neovim pane
# set-option -g @plugin "sainnhe/tmux-fzf" # use fzf to manage tmux work environment
# set-option -g @plugin "laktak/extrakto" # quickly select, copy/insert/complete text w/o a mouse
# set-option -g @plugin "27medkamal/tmux-session-wizard" # control session creation, naming, switching, etc. using fzf & zoxide
# set-option -g @plugin "gcla/tmux-wormhole" # download files & directories with tmux
# set-option -g @plugin "abhinav/tmux-fastcopy" # easymotion-style text copying for tmux; requires Golang compiler
# set-option -g @plugin "CrispyConductor/tmux-copy-toolkit" # various copy-mode tools inspired by several other tmux plugins
run-shell "~/.tmux/plugins/tpm/tpm" # Initialize TPM & run all plugins' scripts