Whenever I open a tmux session in terminal, all of the tabs containing vim sessions are labelled vim.

My question is: How to configure it to label tmux tabs with the name of the edited file or something like vim | test.cpp used as the title of the tabs in question.

  • 1
    can this help : stackoverflow.com/a/15124717/2558252 ? – nobe4 Jul 8 '15 at 19:34
  • thanks for this but can you please elaborate the process in a bit detail? Moreover the answer in not complete. The guy just gave an hint – Mayukh Sarkar Jul 8 '15 at 19:36
  • as the question was answered (and IMHO correctly) could you accept it ? – nobe4 Aug 19 '15 at 9:56

There you go :

autocmd BufReadPost,FileReadPost,BufNewFile,BufEnter * call system("tmux rename-window 'vim | " . expand("%:t") . "'")

Decomposing :

autocmd BufReadPost,FileReadPost,BufNewFile,BufEnter * call

On buffer read, file read or buffer new file event (see :help autocmd-events) execute the next command :

call system()

Call a system function and pass it the text :

"tmux rename-window 'vim | "  

Rename the current window with a string starting with vim |

. expand("%:t") 

Add to the string the filename (see this article for the formatting and this post for the expand insert)

. "'"

Add the final ' to close the command.

After expanding it will look like (while editing the .vimrc file):

system("tmux rename-window 'vim | .vimrc'")

As @erthalion said in the comment, you can clean up when leaving vim with :

autocmd VimLeave * call system("tmux rename-window 'tmux'")
| improve this answer | |
  • 1
    I think it will be nice to include BufEnter event into this list (to change label even when we switch between existing buffers), and something like this autocmd VimLeave * call system("tmux rename-window 'tmux'") for cleanup. – erthalion Jul 16 '15 at 4:02

To restore the default tmux naming scheme when quitting vim you can also do:

autocmd VimLeave * call system("tmux setw automatic-rename")
| improve this answer | |
  • This is used in unison with the other answer provides the best solution. I have seen the tmux rename-window snippet all over, but this is the first time someone pointed out the automatic-rename tmux window option. Thank you. – f3xy Mar 1 '19 at 19:06

This is what I put in my vimrc thanks to the answer by @raphael

I also install the tmux-plugins/vim-tmux-focus-events plugin for the FocusGained and FocusLost events.

augroup tmux                                                                                                                                                                                                                                                                                                                 
  if exists('$TMUX')                                                                                                                                                                                                                                                                                                       
    autocmd BufReadPost,FileReadPost,BufNewFile,FocusGained * call system("tmux rename-window " . expand("%:t"))                                                                                                                                                                                                         
    autocmd VimLeave,FocusLost * call system("tmux set-window-option automatic-rename")                                                                                                                                                                                                                                  
augroup END
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