#!/bin/bash

find . -type f | while read -r file; do
  filename=${file#./}

  if [[ -f ~/.config/$filename ]]; then
    diff $file ~/.config/$filename > /dev/null
    if [[ $? -ne 0 ]]; then
      cp -u ~/.config/$filename ./$filename
      echo "File '$filename' has changed."
    fi
  fi
done