7 years too late I found my way here. I'm sure I won't be the only one
finding this thread in their search engine, so I'll leave the answer. This
works for current tmux as of 2023.
set-option -g automatic-rename-format
'#{?#{==:#{pane_current_command},bash},#{=-20:pane_current_path},#{pane_current_command}}'
If the command is bash (we're at the prompt) then use the last 20
characters of the path (so "window titles too long" isn't a problem),
otherwise use the command we're running.
I decided I'd like to see a little of the path with the command name
(command names tend to be fairly short, so there's room, so I'm actually
using
set-option -g automatic-rename-format
'#{?#{==:#{pane_current_command},bash},#{=-20:pane_current_path},#{=-7:pane_current_path}>
#{pane_current_command}}'
Hope this helps.
On Wednesday, March 16, 2016 at 10:34:00 PM UTC+11 Thomas Sattler wrote:
> To have this working in "current stable" tmux-2.1 use this:
>
> #(test "#{pane_current_command}" == "bash" &&
> echo "#{pane_current_path}" ||
> echo "#{pane_current_command}")
>
> or even
>
> #(test "#{pane_current_command}" == "bash" &&
> echo "#{pane_current_command}:#{pane_current_path}" ||
> echo "#{pane_current_command}")
>
>
> Personally I don't like it as it makes window titles to long.
>
> Thomas
>
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