download.rb

require 'date'

Date.new(2019,10,1).upto(Date.today) do |date|
    d = date.strftime("%y%m%d")
    url = "https://fsapps.fiscal.treasury.gov/dts/files/#{d}00.xlsx"
    unless File.exist? "data/#{d}.xlsx"
        cmd = "curl '#{url}' --output data/#{d}.xlsx"
        p cmd
        `#{cmd}`
    end
end%