fixed2fluid.rb

#!/usr/bin/env ruby

if ARGV.length < 1
	puts "Usage: ruby fixed2fluid.rb FIXED_CSS_FILE [NEW_FLUID_CSS_FILE]"
else
	if File.file?(ARGV[0])
		if ARGV.length == 1
			fixed = File.open(ARGV[0], "r")
		else
			fixed = File.open(ARGV[0], "r")
			fluid = File.open(ARGV[1], "w+")
		end
	
		contents = ''
		
		fixed.each_line do |line|
			contents += line
		end

		new_contents = contents.gsub(/(\d+)px/i) do |match|
			(match.to_f/16).to_s+'em'
		end
				
		if ARGV.length != 1
			fluid.write(new_contents)
		else
			fluid = File.open(ARGV[0], "w+")
			fluid.write(new_contents)
		end
		
		fixed.close
		fluid.close
				
	else
		puts "Fixed CSS File doesn't exist."
	end
end