tmux+vim: zoom into pane and resize windows to equal size in vim with CTRL-W =

tmux-zoom-out-vim

#!/usr/bin/env bash
set -e

cmd="$(tmux display -p '#{pane_current_command}')"
cmd="$(basename "${cmd,,*}")"

tmux resize-pane -Z

if [ "${cmd%m}" = "vi" ]; then
  sleep 0.1
  tmux send-keys C-w =
fi

tmux.conf

bind-key z run-shell 'tmux-zoom-out-vim'

It should be noted that line 5 requires Bash 4. If you don't have Bash 4 you'll get an error like

tmux-zoom-out-vim: line 5: ${cmd^^*}: bad substitution

@raine what is the %m in your comparison that you are doing with the cmd variable interpolation. Haven't seen that before and having trouble finding documentation on it.