convert .xlsx file to .tsv file

xlsx_to_tsv.rb

#! /usr/bin/ruby -Ku

#usage:
#type to terminal "ruby xlsx_to_tsv.rb hoge.xlsx" and then hoge.tsv will be made in the current folder.
#or you can also use wildcard ex "ruby xlsx_to_tsv.rb *.xlsx"
#YOU SHULD NOTE THAT *.tsv in current folder will be overwritten.
#data is assumed to be only in first sheet. 


require 'rubygems'
require 'roo'
require "uri"
require "tempfile"

while file = ARGV.shift
  tmp_file = Tempfile.new('_tmp.xlsx')
  FileUtils.cp(file, '_tmp.xlsx')
  file_base = File.basename(file,".xlsx")
  fp = open(file_base+".tsv","w")
  book = Roo::Spreadsheet.open('_tmp.xlsx')

  sheet = book.sheet(0)
  sheet.each do |row|
    fp.puts row.join("\t")
  end
  tmp_file.close
    #sheet.to_csv(file_base+'.csv')
end