Replace static command list by generated.

It requires version 2.1 of tmux

completion/available/tmux.completion.bash

@@ -5,90 +5,6 @@
 # Usage: Put "source bash_completion_tmux.sh" into your .bashrc
 # Based upon the example at http://paste-it.appspot.com/Pj4mLycDE
 
-    _tmux_cmds=" \
-attach-session \
-bind-key \
-break-pane \
-capture-pane \
-choose-client \
-choose-session \
-choose-window \
-clear-history \
-clock-mode \
-command-prompt \
-confirm-before \
-copy-buffer \
-copy-mode \
-delete-buffer \
-detach-client \
-display-message \
-display-panes \
-down-pane \
-find-window \
-has-session \
-if-shell \
-join-pane \
-kill-pane \
-kill-server \
-kill-session \
-kill-window \
-last-window \
-link-window \
-list-buffers \
-list-clients \
-list-commands \
-list-keys \
-list-panes \
-list-sessions \
-list-windows \
-load-buffer \
-lock-client \
-lock-server \
-lock-session \
-move-window \
-new-session \
-new-window \
-next-layout \
-next-window \
-paste-buffer \
-pipe-pane \
-previous-layout \
-previous-window \
-refresh-client \
-rename-session \
-rename-window \
-resize-pane \
-respawn-window \
-rotate-window \
-run-shell \
-save-buffer \
-select-layout \
-select-pane \
-select-prompt \
-select-window \
-send-keys \
-send-prefix \
-server-info \
-set-buffer \
-set-environment \
-set-option \
-set-window-option \
-show-buffer \
-show-environment \
-show-messages \
-show-options \
-show-window-options \
-source-file \
-split-window \
-start-server \
-suspend-client \
-swap-pane \
-swap-window \
-switch-client \
-unbind-key \
-unlink-window \
-up-pane"
-
 _tmux_expand ()
 {
     [ "$cur" != "${cur%\\}" ] && cur="$cur"'\';
@@ -186,7 +102,7 @@ _tmux() {
 
     if [[ $COMP_CWORD -le $cmd_index ]]; then
         # The user has not specified a command yet
-        COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -W "${_tmux_cmds}" -- "${cur}") )
+        COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -W "$(tmux list-commands | cut -d' ' -f1)" -- "${cur}") )
     else
         case ${cmd} in
             attach-session|attach)