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+# Strip out a lot of machine and X11 dependent crap from the initial
+# environment
+set-environment -gru COLORFGBG
+set-environment -gru COLORTERM
+set-environment -gru DISPLAY
+set-environment -gru SSH_CLIENT
+set-environment -gru SSH_CONNECTION
+set-environment -gru SSH_TTY
+set-environment -gru WINDOWID
+# Otherwise, use the environment we had when we started; don't touch it during
+# a session unless I specifically ask
+set-option -g update-environment ''
+# Setting this makes each new pane a non-login shell, which suits me better
+set-option -g default-command "$SHELL"
+# Expect a 256-color terminal
+set-option -g default-terminal 'screen-256color'
+# Change the prefix to ^A rather than the default of ^B, because I'm a godless
+# GNU Screen refugee, and also I like using ^B in my shell and in Vim more
+unbind-key C-b
+set-option -g prefix C-a
+bind-key a send-prefix
+# Repeating the prefix switches to the last window and back, a GNU Screen
+# feature that's hardwired into my brain now
+bind-key C-a last-window
+# Quick ways to kill single windows and the whole server
+bind-key '/' confirm-before 'kill-window'
+bind-key '\' confirm-before 'kill-server'
+# Slightly more intuitive way to split windows
+bind-key '_' split-window -v
+bind-key '|' split-window -h
+# Switch to the last active pane
+bind-key Tab last-pane
+# Use the vi mode for tmux interaction behaviour in copy and choice modes
+set-window-option -g mode-keys vi
+bind-key -T copy-mode-vi v send -X begin-selection
+bind-key -T copy-mode-vi y send -X copy-selection-and-cancel
+# Detach with Alt-M, no prefix required
+bind-key -n M-m detach
+# Vim-like pane resizing
+bind-key -r '+' resize-pane -U 5
+bind-key -r '-' resize-pane -D 5
+bind-key -r '<' resize-pane -L 5
+bind-key -r '>' resize-pane -R 5
+# Vim-like pane switching
+bind-key h select-pane -L
+bind-key j select-pane -D
+bind-key k select-pane -U
+bind-key l select-pane -R
+# Join and break panes
+bind-key J choose-window "join-pane -h -s '%%'"
+bind-key B break-pane -d
+# Select only sessions in the choose-tree menu, not the whole tree of sessions
+# and windows, I prefer to drill down
+bind-key s choose-session
+# Session title on the left side of the status bar
+set-option -g status-left '[#S] '
+# Username, hostname, and the current date on the right side of the status bar
+set-option -g status-right ' [#H] %F %T'
+# Update the status bar every second
+set-option -g status-interval 1
+# The first window in a session has index 1, rather than 0
+set-option -g base-index 1
+# Don't worry about timeouts for key combinations, as I don't use Escape as
+# meta and prefer things to be snappier
+set-option -g escape-time 0
+# Keep plenty of history
+set-option -g history-limit 100000
+# Don't interfere with my system clipboard
+set-option -g set-clipboard off
+# Only force individual windows to the smallest attached terminal size, not
+# whole sessions
+set-window-option -g aggressive-resize on
+# If I don't set a title on a window, use the program name for the window title
+set-window-option -g automatic-rename on
+# However, don't let terminal escape sequences rename my windows
+set-window-option -g allow-rename off
+# Window titles are the window index, a colon, the window or command name, and
+# any activity or alert indicators
+set-window-option -g window-status-format "#I:#W#F"
+# Message dialogs are white on blue
+set-option -g message-style "bg=colour18,fg=colour231"
+# Window choosers are white on blue
+set-window-option -g mode-style "bg=colour18,fg=colour231"
+# Pane borders are always in the background color
+set-option -g pane-border-style "fg=colour237"
+set-option -g pane-active-border-style "fg=colour237"
+# Inactive windows have slightly washed-out system colours
+set-option -g window-style "bg=colour232,fg=colour248"
+set-option -g window-active-style "bg=colour0,fg=colour15"
+# The status bar has the defined background and foreground colours
+set-option -g status-style "bg=colour237,fg=colour248"
+# Titles of windows default to black text with no embellishment
+set-window-option -g window-status-style "fg=colour16"
+# The title of the active window is in white rather than black
+set-window-option -g window-status-current-style "fg=colour231"
+# A window with a bell has a title with a red background until cleared
+set-window-option -g window-status-bell-style "bg=colour9"
+# Source any configuration in the subdir if there is any
+if-shell 'set -- "$HOME"/.tmux.conf.d/*;test -e "$1"' \
+ 'source-file ~/.tmux.conf.d/*.conf'