Rake task to concatenate CSS files

Rakefile

destination = 'public'
source = 'source'

desc "Concatenate CSS files"
task :concatenate_css do
  files = FileList["#{source}/**/*.css"]
  concatenated_filename = "#{destination}/stylesheets/styles.css"

  File.open(concatenated_filename, "w") do |output|
    files.each do |input|
      puts "Reading #{input}"
      output.write(File.read(input))
      output.write("\n")
    end
  end

end

Just a guess here, but I wonder if you need to use write near line 12? Something like:

output.write(input)

or maybe output.write(File.read(input))

Neither of these work… it appears as if files are being read, but their content is ignored. Hmmm.

      puts "Reading #{input}"
      output.write(File.read(input))
      output.write("\n")

And file assignment is unnecessary.

Have updated code with what I believe are the suggested changes, but this still doesn’t work! Output of the file is still a series of line breaks.

It works fine on my laptop. Delete the destination file and try again? Make sure you are not opening another file instead of the destination file.

Okay, sounds like I may be doing something stupid my end…!

I can confirm, I was doing something stupid! At some point during implementing these suggestions, the content in each of the source files was deleted. All working now, thanks!