Jekyll permalink fix for pages without trailing slash

permalink_fix.rb

Dir["**/*.html"].each do |file|

  next if file.include?("index.html") || file.start_with?("_")

  data = File.read(file)
  next if data.include?("permalink:")

  permalink = "/" + file.sub(".html", "/")

  puts "#{file} => #{permalink}"

  File.open(file, 'w') do |f|
    f.write(data.sub("---\n", "---\npermalink: #{permalink}\n"))
  end

end