gem_metadata_exporter.rb

require 'csv'
require 'gems'

CSV.open("#{ENV['HOME']}/Documents/gems_and_metadata.csv", 'wb') do |csv|
  gems = CSV.foreach("#{ENV['HOME']}/Documents/gems.csv") do |row|
    new_row = row.concat([nil, nil])
    begin
      info = Gems.info(row.first)
      new_row[new_row.size - 2] = info['authors']
      new_row[new_row.size - 1] = info['homepage_uri']
    rescue
    ensure
      puts new_row.join(',')
      csv << new_row
    end
  end
end