Class: Brakeman::Rescanner

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# File 'lib/brakeman/rescanner.rb', line 21

def recheck
  rescan if @changes.nil?

  tracker.run_checks if @changes

  Brakeman::RescanReport.new @old_results, tracker.checks
end

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# File 'lib/brakeman/rescanner.rb', line 30

def rescan
  tracker.template_cache.clear

  paths_by_type = {}

  SCAN_ORDER.each do |type|
    paths_by_type[type] = []
  end

  @paths.each do |path|
    paths_by_type[file_type path] << path
  end

  @changes = false

  SCAN_ORDER.each do |type|
    paths_by_type[type].each do |path|
      if rescan_file path, type
        @changes = true
      end
    end
  end

  if @changes and not @reindex.empty?
    tracker.reindex_call_sites @reindex
  end

  self
end

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# File 'lib/brakeman/rescanner.rb', line 97

def rescan_controller path
  #Process source
  process_controller path

  #Process data flow and template rendering
  #from the controller
  tracker.controllers.each do |name, controller|
    if controller[:file] == path
      tracker.templates.keys.each do |template_name|
        if template_name.to_s.match /(.+)\.#{name}#/
          tracker.templates.delete template_name
        end
      end

      @processor.process_controller_alias controller[:src]
    end
  end
end

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# File 'lib/brakeman/rescanner.rb', line 61

def rescan_file path, type = nil
  type ||= file_type path

  case type
  when :controller
    rescan_controller path
    @reindex << :controllers << :templates
  when :template
    rescan_template path
    @reindex << :templates
  when :model
    rescan_model path
  when :lib
    process_library path
  when :config
    process_config
  when :initializer
    process_initializer path
  when :routes
    # Routes affect which controller methods are treated as actions
    # which affects which templates are rendered, so routes, controllers,
    # and templates rendered from controllers must be rescanned
    tracker.reset_routes
    tracker.reset_templates :only_rendered => true
    process_routes
    process_controllers
    @reindex << :controllers << :templates
  when :gemfile
    process_gems
  else
    return false #Nothing to do, file hopefully does not need to be rescanned
  end

  true
end

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# File 'lib/brakeman/rescanner.rb', line 162

def rescan_model path
  num_models = tracker.models.length
  tracker.reset_model path
  process_model path if File.exists? path

  #Only need to rescan other things if a model is added or removed
  if num_models != tracker.models.length
    process_templates
    process_controllers
    @reindex << :templates << :controllers
  end

  @reindex << :models
end

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# File 'lib/brakeman/rescanner.rb', line 116

def rescan_template path
  template_name = template_path_to_name(path)

  tracker.reset_template template_name
  process_template path

  @processor.process_template_alias tracker.templates[template_name]

  rescan = Set.new

  rendered_from_controller = /^#{template_name}\.(.+Controller)#(.+)/
  rendered_from_view = /^#{template_name}\.Template:(.+)/

  #Search for processed template and process it.
  #Search for rendered versions of template and re-render (if necessary)
  tracker.templates.each do |name, template|
    if template[:file] == path or template[:file].nil?
     name = name.to_s

     if name.match(rendered_from_controller)
       #Rendered from controller, so reprocess controller

       rescan << [:controller, $1.to_sym, $2.to_sym]
     elsif name.match(rendered_from_view)
       #Rendered from another template, so reprocess that template

       rescan << [:template, $1.to_sym]
     end
    end
  end

  rescan.each do |r|
    if r[0] == :controller
      controller = tracker.controllers[r[1]]

      unless @paths.include? controller[:file]
        @processor.process_controller_alias controller[:src], r[2]
      end
    elsif r[0] == :template
      template = tracker.templates[r[1]]

      rescan_template template[:file]
    end
  end
end