function precmd() {
  if command git rev-parse --git-dir > /dev/null 2>&1; then
    window_label=$(git rev-parse --show-toplevel)
    tab_label=$(echo $window_label | awk -F\/ '{print "[git] " $NF}')
  else
    window_label=${PWD/${HOME}/\~}
    tab_label=$window_label
  fi
  echo -ne "\e]2;${window_label}\a"
  echo -ne "\e]1;${tab_label: -24}\a"
}