impact.rb

#!/usr/bin/ruby

require "optparse"

# Impact v0.1
# @Author: Ryan McGrath
# @Email: ryan [at] venodesigns.net

# Impact is a Ruby script to strip out spaces and useless junk from CSS and Javascript files. It doesn't
# obfuscate the code in any manner, it simply kills all whitespace and newlines. Very simple...

# A String that gets built on, and is eventually tossed into our new file.
finalCode = ""

# Crash if we don't get the arguments we want
unless ARGV.length >= 1
	puts "You realize that you called this without passing any files, right?"
	puts "Usage: ruby impact.rb <filenames>"
	exit
end

# Loop through the files passed in from the command line
ARGV.each do |filename|
	text = File.new(filename, "r")
	text.readlines.each do |textline|
		if textline.index('#') != 0
			temporaryCodeHolder = Array.new

			# This could be horribly intensive - benchmark this at some point
			textline.each_byte do |c|
				# Manually compare and check for tabs (This might grow, .chomp doesn't catch certain things)
				temporaryCodeHolder << c.chr if c != 9 || c == 10 || c == 13
			end

			finalCode += temporaryCodeHolder.join.chomp
		end
	end
end

# Strip out spaces (This could become more intensive once we start parsing JS)
# We use a regular expression, as it seems to be the fastest way to remove spaces
# across various Ruby distributions. String.squeeze and such tend to get slower 
# depending on the environment you're running in, oddly enough.
finalCode.gsub!(/ +/, '')

# Create our new file, which will hold the minified and concatenated code, and toss it in
impactedFile = File.open("impact_minified_javascript.js", "w")
impactedFile.puts finalCode