Ruby script that finds all TODO comments in a file or multiple files and outputs to out.txt

todo_generator.rb

#! /usr/bin/env ruby
if ARGV.empty?
  puts "Please enter a file name"
  exit
end

out_file = File.new("out.txt", "w+")

puts "Appending to output file..."

ARGV.each do |file|

  line_num = 1
  out_file.puts("File: " + file + ":\n" )
  out_file.puts("-----------------------" + "\n" )

  File.readlines(file).each do |line|

    if line.downcase.include? "todo"

      out_file.puts("Line " +  line_num.to_s + ": " + line.chomp + "\n")

    end
    line_num += 1
  end #end of loop for each line in the file

  out_file.puts("-----------------------" + "\n" )

end #end of loop for each arg
puts "Done! The results can be found in the out.txt file"
out_file.close