Compass Gzip stats

compass-gzip-stats.rb

def to_human n
  count = 0
  while  n >= 1024 and count < 4
    n /= 1024.0
    count += 1
  end
  format("%.2f",n) + %w(B KB MB GB TB)[count]
end

require 'zlib'
# output size of css after compiling 
on_stylesheet_saved do |filename|
  defl = Zlib::Deflate.new
  defl.deflate(File.read(filename));
  compressed = defl.deflate(nil)
  
  print "\tSize: ", to_human(File.size(filename)), " / ", to_human(compressed.length), " (gzip)\n"
end

compass-selector-stats.rb

require 'css_parser'

# check for IE selector bug (would need bless-css or manual work)

# remember previous selector and property counts per file
previous_selector_count = Hash[]
previous_prop_count = Hash[]

on_stylesheet_saved do |filename|
  parser = parser = CssParser::Parser.new
  parser.load_file!(filename)
  
  selector_count = 0
  prop_count = 0
  parser.each_selector do |selector, declarations, specificity|
    sels = selector.split(/,/).size
    props = declarations.split(/;/).size
    selector_count += sels
    prop_count += props
  end
  
  if not previous_selector_count.key?(filename)
    previous_selector_count[filename] = 0
  end
  psc = previous_selector_count[filename]

  if not previous_prop_count.key?(filename)
    previous_prop_count[filename] = 0
  end
  ppc = previous_prop_count[filename]
  
  selector_increase = ""
  if psc != 0
    selector_diff = selector_count - psc
    if selector_diff < 0
      selector_increase << " \e[32m#{selector_diff}\e[0m"
    elsif selector_diff > 0
      selector_increase << " \e[33m+#{selector_diff}\e[0m"
    end
  end
  previous_selector_count[filename] = selector_count
  
  prop_increase = ""
  if ppc != 0
    prop_diff = prop_count - ppc
    if prop_diff < 0
      prop_increase << " (\e[32m#{prop_diff}\e[0m)"
    elsif prop_diff > 0
      prop_increase << " (\e[33m+#{prop_diff}\e[0m)"
    end
  end
  previous_prop_count[filename] = prop_count
  
  print "\t", selector_count," selectors", selector_increase, ", ", prop_count, " properties", prop_increase, "\n"
  
  if selector_count > 4096
    puts "\t\e[31mwarning \e[0mIE selector limit reached. Consider using blesscss.com\n"
  end
end