Rename a model named Micropost to one named MicroPost for our INFO 2310 class

rename_micro_post.rb

def replace_in_file(path, str, replacement)
  puts "replacing #{str} with #{replacement} in #{path}"
  contents = File.read(path)
  File.write(path, contents.gsub(str, replacement))
end

def do_cmd(cmd)
  puts cmd
  `#{cmd}`
end

if File.exist? "app/models/micropost.rb"
  
  ["app/**/*", "spec/**/*"].each do |root|
    
    Dir.glob(root).each do |f|
      if (f.index "microp") && !File.directory?(f)
        replace_in_file f, "Micropost", "MicroPost"
        replace_in_file f, "micropost", "micro_post"
      end
    end

    Dir.glob(root).each do |f|
      if (f.index "microp") && File.directory?(f)
        do_cmd "git mv #{f} #{f.sub("microp", "micro_p")}"
      end
    end

    Dir.glob(root).each do |f|
      if (f.index "microp") && !File.directory?(f)
        do_cmd "git mv #{f} #{f.sub("microp", "micro_p")}"
      end
    end
  end

  replace_in_file "config/routes.rb", "microp", "micro_p"
  
  # create migration file
  timestamp = Time.now.to_s.split(" ")[0..1].join(" ").gsub!(/\D/, "")
  file_name = "db/migrate/#{timestamp}_rename_microposts_to_micro_posts.rb"
  File.write(file_name,
<<-ruby
class RenameMicropostsToMicroPosts < ActiveRecord::Migration
  def change
    rename_table :microposts, :micro_posts
  end
end
ruby
  )
  do_cmd "bundle exec rake db:migrate"
  do_cmd "bundle exec rake db:test:prepare"
end