Use bash functions in tmux run-shell command

Question

I am trying to implement a feature of opening files in vim using ranger in separate tmux pane. It works if define commands directly in .tmux.conf. But having much code there doesn't look good, so I am trying to move it into functions and source them in .bashrc, but this yelds 'tmux__ranger_to_vim' returned 127. Why tmux run-shell doesn't see functions defined in .bashrc and is it possible to make them available for it?

.bashrc

    function tmux__current_pane_has_process {
      test -n "$1" || { echo "No process name" >&2; return 1; }
      pattern='^[^TXZ ]+ +'"${1}"'$'
      ps -o state= -o comm= | grep -iqE "$pattern"
    }
    
    function tmux__ranger_to_vim {
      tmux__current_pane_has_process 'ranger' || return 0
      tmux send-keys 'y'
      sleep .01
      tmux send-keys 'p'
      tmux select-pane -L
      tmux__current_pane_has_process 'n?vim' || return 0
      tmux send-keys ':tabe ' C-r * C-m
    }

.tmux.conf

bind-key t run-shell "tmux__ranger_to_vim"

Answer 1

tmux run-shell runs command as sh -c which doesn't source .bashrc. Also on some systems sh is not a bash at all but dash. So one have to explicitly source the file where required function defined before calling it:

bind-key t run-shell 'bash -c "source ~/.tmux.bash ; tmux__ranger_to_vim"'