Class: Skylight::Core::Probes::Sinatra::Probe Private

Inherits:
Object
  • Object
show all
Defined in:
lib/skylight/core/probes/sinatra.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Method Summary collapse

Instance Method Details

#install ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/skylight/core/probes/sinatra.rb', line 5

def install
  if ::Sinatra::VERSION < "1.4.0"
    # Using $stderr here isn't great, but we don't have a logger accessible
    $stderr.puts "[SKYLIGHT::CORE] [#{Skylight::VERSION}] Sinatra must be version 1.4.0 or greater."
    return
  end

  class << ::Sinatra::Base
    alias_method :compile_without_sk!, :compile!

    def compile!(verb, path, *args, &block)
      compile_without_sk!(verb, path, *args, &block).tap do |_, _, keys_or_wrapper, wrapper|
        wrapper ||= keys_or_wrapper

        # Deal with the situation where the path is a regex, and the default behavior
        # of Ruby stringification produces an unreadable mess
        if path.is_a?(Regexp)
          human_readable = "<sk-regex>%r{#{path.source}}</sk-regex>"
          wrapper.instance_variable_set(:@route_name, "#{verb} #{human_readable}")
        else
          wrapper.instance_variable_set(:@route_name, "#{verb} #{path}")
        end
      end
    end
  end

  ::Sinatra::Base.class_eval do
    alias_method :dispatch_without_sk!, :dispatch!
    alias_method :compile_template_without_sk, :compile_template

    def dispatch!(*args, &block)
      dispatch_without_sk!(*args, &block).tap do
        Skylight::Core::Fanout.each_trace do |trace|
          # Set the endpoint name to the route name
          if (route = env["sinatra.route"])
            # Include the app's mount point (if available)
            script_name = trace.instrumenter.config.sinatra_route_prefixes? && env["SCRIPT_NAME"]

            trace.endpoint =
              if script_name && !script_name.empty?
                verb, path = route.split(" ", 2)
                "#{verb} [#{script_name}]#{path}"
              else
                route
              end
          end
        end
      end
    end

    def compile_template(engine, data, options, *args, &block)
      # Pass along a useful "virtual path" to Tilt. The Tilt probe will handle
      # instrumenting correctly.
      options[:sky_virtual_path] = data.is_a?(Symbol) ? data.to_s : "Inline template (#{engine})"

      compile_template_without_sk(engine, data, options, *args, &block)
    end
  end
end