CSV charset conversion to utf-8

fileutils.rb

require 'fileutils'

module FileUtils
  def self.convert_file_encoding inputfile, encoding='utf-8'

    if File.exists? inputfile
      file_info       = %x{file -ib #{inputfile}}
      file_info       =~ /charset=(.*)/
      file_charset  = $1

      unless file_charset
        # we're relying on file-5.11 that returns the correct charset
        # our DEV environment has an older version of this package
        # that doesn't return the 'charset='', so we're defaulting it to iso-8859-1
        file_charset ||= 'iso-8859-1'

        puts "Current encoding of #{inputfile} defaulted to  #{file_charset}"
      else
        puts "Current encoding of #{inputfile} is #{file_charset}"
      end

      if file_charset != encoding
        %x{ iconv --from-code=#{file_charset} --to-code=#{encoding} #{inputfile} --output=#{inputfile}_conv }

        FileUtils.mv "#{inputfile}_conv", inputfile
        puts "File saved on encoding: #{encoding}"
      end

    else
      puts "#{__CLASS__} :: File '#{file_path}' does not exist"
    end
  end
end