Log callsite information for a given class.

gem install gun_dog -v 0.0.3



GunDog is a Tracepoint tool for finding the interface of particular classes within a given context.

Often times you'd like to refactor a class, but are not sure about what sort of calls the class may receive. GunDog sets up special Tracepoint listeners to log and record code execution metrics on a given class.


Add this line to your application's Gemfile:

ruby gem 'gun_dog'

And then execute:

$ bundle

Or install it yourself as:

$ gem install gun_dog


To use GunDog find the general area were you'd like to refactor a class.

trace = GunDog.trace(MyClassName) do

Trace is a GunDog::TraceReport object that can be saved to JSON (and loaded from JSON) for analysis.

GunDog is still a pup - here are some upcoming features.

  • TraceReport introspect methods from CallRecords
  • TraceReport pretty reports
  • Trace Multiple Classes with one Dog
  • Inhibit: Generate warnings when methods in a TraceReport are called.


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at