gistfile1.rb

namespace :svg2js do
  %w(object array).each do |format|
    desc "convert svg files to javascript #{format}, require :from and :to arguments"
    task format do
      unless ENV["from"] && ENV["to"]
        puts "from and to params required"
      else
        Svg2JsConvertor.convert(ENV["from"], ENV["to"], format)

        puts "#{ENV["to"]} generated succesfully"
      end
    end
  end
end

class Svg2JsConvertor
  def self.convert(from_file, to_file, format)
    convertor = self.new
    convertor.load_file(from_file)

    File.open(to_file, 'w+') do |file|
      file.write convertor.__send__(:"to_js_#{format}")
    end
  end

  PATTERN = /\W+d=("[^"]+")/

  def initialize
    @content = []
  end

  def load_file(file_name)
    open(file_name) do |file|
      file.each do |line|
        if match = line.match(PATTERN)
          @content << match[1]
        end
      end
    end
  end

  def to_js_object
    index = 0
    pad   = @content.size.to_s.size
    "{\n    " + @content.map { |line| "\"label#{(index += 1).to_s.rjust(pad, '0')}\": #{line}" }.join("\n  , ") + "\n};"
  end

  def to_js_array
    "[\n  " + @content.join("\n, ") + "\n];"
  end
end