Script to compare apps. ( Used when creating a engine to avoid duplicate code on two projects. )

comparer.rb

class Comparer

  DEFAULT_CONFIG = {
    folders: [:app, :lib],
    formats: [:erb, :rb, :js, :css, :coffee]
  }

end

class Application

  def initialize app_path
    Comparer::DEFAULT_CONFIG[:folders].each do |folder|
      add_files_from "#{app_path}/#{folder}"
    end
  end

  def add_files_from dir
    entries = Dir.entries dir
    entries.each do |entry|
      if entry != "." and entry != ".."
        file_path = "#{dir}/#{entry}"
        if File.directory? file_path
          add_files_from file_path
        elsif Comparer::DEFAULT_CONFIG[:formats].any? { |format| file_path.end_with? ".#{format}" }
          add_single_file file_path
        end
      end
    end
  end

  def add_single_file file_path
    files[file_path] = File.read(file_path).chomp.gsub(" ", "").gsub("\n", "").gsub("\t", "")
  end

  def files
    @files ||= {}
  end

end

app_one = Application.new("path to app 1")
app_two = Application.new("path to app 2")

app_one.files.each do |path, content|
  app_two.files.each do |tpath, tcontent|
    if content == tcontent
      puts "Match: #{path} && #{tpath}"
    end
  end
end