Enumerates the SASS variables in your Rails app, and searches for places they can be used.

sassify.rb

#!/usr/bin/ruby
#
# Needs work, feel free to contribute.
# Dependencies: ANSI color escapes, spits out vim commands.
#
# USAGE
# ./sassify.rb list
# ./sassify.rb [files...]
#
# list           - Command which lists all loaded SASSY variables.
#                  Of course, pretty prints in color and stuff.
#
# files...       - Files to search for REPLACEMENTS.
#                  If empty, we'll look in all your .scss files
#                  We still look in all your .scss files for variables...
#                  ... because reasons.
#

begin
  puts "Enumerating application stylesheets..."

  @app_scss = Dir['app/**/*.scss']
  @scss_var = Hash.new

  puts "Found #{@app_scss.count} files."
  puts

  puts "Loading variables..."

  @app_scss.each do |f|
    File.readlines(f).each do |l|
      next unless l =~ /\$([\w\-]+):\s*(.*?);/
      next if $2[0] == '$'
      @scss_var[$1] = [%r{[\w\-]+:.*?[\(,\s]#{Regexp.escape($2)}\b}, Regexp.escape($2), $2]
    end
  end

  puts "Found #{@scss_var.count} variables."
  puts

  if ARGV[0].downcase == "list"
    @scss_var.each do |k,v|
      puts "\x1b[36m$%s\x1b[0m:\t\x1b[35m%s\x1b[0m;" % [
        k, v[2]
      ]
    end

    exit 0
  end

# List Search Files

  @search = ARGV.collect { |f| Dir[f] }.flatten
  @search.empty? and @search = @app_scss

  puts "Searching for replacements in #{@search.count} files..."
  puts

  @search.each do |f|
    File.readlines(f).each_with_index do |l, n|
      l.strip!
      print "\x1b[33m%25s [%04d] >\x1b[35m%s\x1b[0m\r" % [
        f, n + 1,
        ("." * (n%25)) + (" " * (25-(n%25)))
      ]

      @scss_var.each do |k, v|
        next if /\$#{k}:/.match(l)
        next unless v[0].match(l)

        puts "\x1b[37;1m%30s\x1b[0m:%04d - \x1b[32m%s\x1b[31m => \x1b[36m$%s\x1b[0m: \x1b[35m%s\x1b[0m" % [
          f, n + 1, l, k, v[2]
        ]

        puts "\tvim %s +:%s +:s/%s/\\$%s/gi +:wq" % [
          f, n + 1, v[1], k
        ]

        puts
      end
    end
  end

  puts "\x1b[K\x1b[0mGood bye, I'm finished."

rescue Interrupt
  puts
  puts "\x1b[K\x1b[0mGood bye, you killed me."
  exit 1
end