Allows navigating between macOS windows (using hammerspoon) and tmux

navigate

if [ "$#" -ne 1 ]; then
  echo "Usage: $0 left|right|top|bottom|previous"
  echo ""
  echo "e.g.: $0 left"
  exit 99
fi

DIRECTION=$1

if [ "$DIRECTION" == "left" ]; then
  HS_DIRECTION="West"
  TMUX_DIRECTION="L"
elif [ "$DIRECTION" == "right" ]; then
  HS_DIRECTION="East"
  TMUX_DIRECTION="R"
elif [ "$DIRECTION" == "top" ]; then
  HS_DIRECTION="North"
  TMUX_DIRECTION="U"
elif [ "$DIRECTION" == "bottom" ]; then
  HS_DIRECTION="South"
  TMUX_DIRECTION="D"
elif [ "$DIRECTION" == "previous" ]; then
  TMUX_DIRECTION="l"
else
  echo "Direction $DIRECTION is invalid."
  exit 1
fi

if [[ -n $TMUX && ("$DIRECTION" == "previous" || $(tmux display -p "#{pane_at_$DIRECTION}") -eq '0') ]]; then
  tmux select-pane -$TMUX_DIRECTION
elif [[ ! -z "$HS_DIRECTION" ]]; then
  hs -c "hs.window.focusedWindow():focusWindow$HS_DIRECTION(nil, true, true);"
fi