My tmux.conf file supporting truecolor terminals and many other hacks.

.tmux.conf

# tmux configuration file.
# Save as $HOME/.tmux.conf
# Marco Paganini <[email protected]>
#
# Useful command:
#   tmux new -D -A -s session_name
#
# This will create a new session if the specified session does not
# exist. If it does, it will detach that session and attach to it.

# C-a FTW!
set-option -g prefix C-a

# Common binds (screen-like)
bind-key C-a last-window
bind-key C-Space next-window
bind-key C-d detach
bind-key Space next-window
bind-key BSpace previous-window
bind-key k confirm-before -p "kill-pane #P? (y/n)" kill-pane

# No mouse support by default.
set -g mouse off

# Ctrl-A H/h turn on/off output logging.
bind-key H pipe-pane "exec cat >>$HOME/'tmux-#H-#S-#P.log'" \; display-message 'Started logging to $HOME/tmux-#H-#S-#P.log'
bind-key h pipe-pane \; display-message 'Ended logging to $HOME/tmux-#H-#S-#P.log'

# Use vi keys in copy and choice modes and improve some bindings.
# Use list-keys -t vi-copy to see all bindings.
# Enter in copy mode uses xclip to copy the selection to the
# cut buffer and primary clipboard.
setw -g mode-keys vi
bind P paste-buffer
bind-key -T copy-mode-vi 'v' send-keys -X begin-selection
bind-key -T copy-mode-vi 'r' send-keys -X rectangle-toggle
bind-key -T copy-mode-vi Home send-keys -X start-of-line
bind-key -T copy-mode-vi End send-keys -X end-of-line
bind-key -T copy-mode-vi C-PPage send-keys -X history-top
bind-key -T copy-mode-vi C-NPage send-keys -X history-bottom
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-pipe-and-cancel "xclip -sel clip -i"
bind-key -T copy-mode-vi Enter send-keys -X copy-pipe-and-cancel "xclip -i -f -selection primary | xclip -i -selection clipboard"

# word separators for automatic word selection
setw -g word-separators ' @"=()[]'
setw -ag word-separators "'"

# Pane navigation: Use Meta-hjkl or Meta-Arrows, directly (no prefix).
bind-key -n M-h select-pane -L
bind-key -n M-j select-pane -D
bind-key -n M-k select-pane -U
bind-key -n M-l select-pane -R

bind-key -n M-Left  select-pane -L
bind-key -n M-Down  select-pane -D
bind-key -n M-Up    select-pane -U
bind-key -n M-Right select-pane -R

# C-a TAB == next pane.
bind-key Tab select-pane -t :.+

# C-a ESC = copy mode
bind-key Escape copy-mode

# Better split commands
bind | split-window -h
bind - split-window -v
unbind '"'
unbind %

# Lock client with C-A,x (needs the vlock command)
set -g lock-command vlock
set -g lock-after-time 0 # Seconds; 0 = never
bind x lock-client
bind o set lock-after-time 300 \; display-message "Auto-lock enabled (5m)"
bind O set lock-after-time 0 \; display-message "Auto-lock disabled"

# Easy config reloads
bind R source-file ~/.tmux.conf \; display-message "Configuration reloaded"

# Start numbering at 1
set -g base-index 1

# Allows for faster key repetition
set -s escape-time 0

# Allows inheriting SSH_AUTH_SOCK and others in case of re-attach.
# Only new sessions will get the new variables from outside tmux.
# For SSH_AUTH_SOCK, 'tm' creates a symlink to a fixed location.
set -g update-environment "DISPLAY SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY"

# Status bar settings

# status line
set -g status-justify left
set -g status-bg colour8
set -g status-fg colour15
set -g status-left ""
set -g status-right "|#[fg=yellow]#S"

# messaging
set -g message-style fg=black,bg=yellow
set -g message-command-style fg=magenta,bg=black

# Rename window numbers after window close.
set -g renumber-windows on

# window status options.
setw -g window-status-format "#F#I #W"

setw -g window-status-current-format "#F#I #W"
setw -g window-status-current-style fg=colour15,bg=colour24
setw -g window-status-style fg=colour15,bg=colour8

# Allow change of window title with escape sequences.
setw -g allow-rename on

# Don't try to change the window title automatically (this is done by PROMPT_COMMAND)
setw -g automatic-rename off

# Rather than constraining window size to the maximum size of any client
# connected to the *session*, constrain window size to the maximum size of any
# client connected to *that window*. Much more reasonable.
setw -g aggressive-resize on

# Allows us to use C-a a <command> to send commands to a TMUX session inside
# another TMUX session
bind-key a send-prefix

# Change the terminal status, if possible.
set -g set-titles on
set -g set-titles-string "[#S] #(whoami)@#h: #W"

# Huge scrollback
set -g history-limit 15000

# Force terminal type.
set -g default-terminal "tmux-256color"

# True color terminal overrides
# This matches a terminal *outside* tmux and enables truecolor support (Tc).
# Use tmux info | grep Tc to verify.
#
# More info at: https://gist.github.com/XVilka/8346728
# Github issue: https://github.com/tmux/tmux/issues/34
# In vim: set tgc=on may be required.
set-option -ga terminal-overrides ",*256col*:Tc"
set-option -ga terminal-overrides ",xterm:Tc"