Automatically close pane after loosing focus

[pianocomposer321]

I have the following mapping for python in vim: au FileType python nnoremap <buffer> <C-b> :wa<cr>:exec "VtrSendCommand! python " . expand('%')<cr>:exec "VtrFocusRunner!"<cr>

How can I make Vtr automatically close the runner pane after it loses focus?

[christoomey]

Unfortunately, I'm not sure this is possible. This plugin runs as vimscript that does it's best to keep in sync with the tmux panes it manages, but there isn't a way that I can think of for this plugin to know about the runner pane losing focus.

That said, I think you could get the workflow you're looking for with just normal tmux functionality. If you pass a command to tmux when running split-window, tmux will wait until that command completes and exit. E.g. tmux split-window htop will split open a new tmux pane with htop running. Once you exit htop, tmux will automatically close the pane.

With that in mind, I think you could use the following:

nnoremap <buffer> <C-b> :wa<cr>:call system("tmux split-window 'python " . expand('%') . "'"<cr>

Note - if the window opens and closes immediately then it means you have an error in your shell command.

---

Hope that helps! Since this isn't functionality for the plugin itself, I'm going to close this issue.

[pianocomposer321]

For some reason, your mapping wasn't working for me (even after I added the missing closing parenthesis for the system function 😁) - the pane closed immediately even for commands like echo hi. Instead, I have the following function in my bashrc:

function pause(){
 read -s -n 1 -p "Press any key to continue . . ."
 echo ""
}

so that I can have the command pause just like in dos/windows cmd. I changed the mapping to

nnoremap <buffer> <C-b> :wa<Cr>:exec "VtrSendCommand! python " . expand('%') . " && pause && exit"<cr>:exec "VtrFocusRunner!"<cr>

and it works...sort of. The problem is that when I try to send a command after running exit in the VTR runner pane, I get an error: VTR: Runner pane setting (n) is invalid. Please reattach.

Any ideas?

[pianocomposer321]

I have gotten something to work. Modified from https://github.com/christoomey/vim-tmux-runner/issues/73#issuecomment-509525771:

function! SendTmuxCommand(text)
  let panes = split(system("tmux list-panes"), '\n')
  let active = filter(copy(panes), 'v:val =~ "\\(active\\)"')
  let vimPane = str2nr(active[0])
  let cmdPane = vimPane + 1
  let panes = filter(panes, 'v:val =~ "^'.cmdPane.':.*"')
  if len(panes) == 0
    call system('tmux split-window -v -l 10')
    call system('tmux select-pane -t '.vimPane)
  endif

  let cmd = "tmux send-keys -t ".cmdPane." ".shellescape(a:text . " && read -s -n 1 -p 'Press any key to continue . . .' && echo && exit") . " C-m"
  call system(cmd)
  call system("tmux select-pane -t " . cmdPane)
endfunction

and in init.vim: au FileType python nnoremap <buffer> <C-b> :wa<cr>:call SendTmuxCommand("python " . expand('%'))<cr>

If you have a pure vim-tmux-runner solution, I might use it but otherwise, this will do for now.