Module: Rack::MiniProfilerRails

Defined in:
lib/mini_profiler_rails/railtie.rb

Defined Under Namespace

Classes: Railtie

Class Method Summary collapse

Class Method Details

.initialize!(app) ⇒ Object

call direct if needed to do a defer init



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# File 'lib/mini_profiler_rails/railtie.rb', line 6

def self.initialize!(app)
  
  raise "MiniProfilerRails initialized twice. Set `require: false' for rack-mini-profiler in your Gemfile" if @already_initialized
    
  c = Rack::MiniProfiler.config

  # By default, only show the MiniProfiler in development mode, in production allow profiling if post_authorize_cb is set
  #
  # NOTE: this must be set here with = and not ||=
  #  The out of the box default is "true"
  c.pre_authorize_cb = lambda { |env|
    !Rails.env.test?
  }

  c.skip_paths ||= []

  if Rails.env.development?
    c.skip_paths << app.config.assets.prefix if app.respond_to? :assets
    c.skip_schema_queries = true
  end

  unless Rails.env.development? || Rails.env.test?
    c.authorization_mode = :whitelist
  end

  if Rails.logger
    c.logger = Rails.logger
  end

  # The file store is just so much less flaky
  base_path = Rails.application.config.paths['tmp'].first rescue "#{Rails.root}/tmp"
  tmp       = base_path + '/miniprofiler'
  FileUtils.mkdir_p(tmp) unless File.exists?(tmp)

  c.storage_options = {:path => tmp}
  c.storage = Rack::MiniProfiler::FileStore

  # Quiet the SQL stack traces
  c.backtrace_remove = Rails.root.to_s + "/"
  c.backtrace_includes =  [/^\/?(app|config|lib|test)/]
  c.skip_schema_queries = (Rails.env.development? || Rails.env.test?)

  # Install the Middleware
  app.middleware.insert(0, Rack::MiniProfiler)

  # Attach to various Rails methods
  ActiveSupport.on_load(:action_controller) do
    ::Rack::MiniProfiler.profile_method(ActionController::Base, :process) {|action| "Executing action: #{action}"}
  end
  ActiveSupport.on_load(:action_view) do
    ::Rack::MiniProfiler.profile_method(ActionView::Template, :render) {|x,y| "Rendering: #{@virtual_path}"}
  end
  
  @already_initialized = true
end