Convert Sweetroll entires' file names to new, date-based format

rename_to_timestamp.rb

%w(date json).each { |m| require m }
Dir[File.join ARGV.first, "**/*.json"].each do |path|
  fname = File.basename(path)
  next if (fname =~ /^\d+-.*/).nil?
  pub = (JSON.parse(File.read(path))["properties"] || {})["published"] || []
  next if pub.empty?
  newpath = File.join File.dirname(path), fname.gsub(/^\d+/, DateTime.parse(pub.first).strftime("%s"))
  puts "#{path} => #{newpath}"
  File.rename path, newpath
end