Fixed the height of panes even when the window resizes

tmux-fixh.sh

#!/bin/bash
#
# example:
# ./tmux-fixh.sh -g top-right 7

if [ "$#" -lt 2 ] && [  "$1" != "-u" ]
then
    echo "usage: $0 [-gu] <pane> <height>"
    exit 1
fi

if [ "$1" == "-g" ]
then
    echo "tmux set-hook -g window-layout-changed \"run-shell '$0 $2 $3'\""
    tmux set-hook -g window-layout-changed "run-shell '$0 $2 $3'"
elif [ "$1" == "-u" ]
then
    echo "tmux set-hook -gu window-layout-changed"
    tmux set-hook -gu window-layout-changed
else
    # zoomed?
    z=$(tmux list-panes -F '#F' | grep -o -m1 'Z')
    # height changed?
    h=$(tmux display-message -p -t "$1" '#{pane_height}')

    if [ "$z" != 'Z' ] && [ "$h" != "$2" ]
    then
        tmux resize-pane -t "$1" -y "$2"
    fi
fi