TypeFusion

Installation

Install the gem and add to the application’s Gemfile by executing:

bundle add type_fusion

If bundler is not being used to manage dependencies, install the gem by executing:

gem install type_fusion

Rack

require "type_fusion/rack/middleware"

use TypeFusion::Middleware

Rails

Adding the gem to your applications Gemfile will automatically setup type_fusion.

Minitest

If you only want to run TypeFusion in your test environment you can require type_fusion/minitest in your test_helper.rb:

# test/test_helper.rb

ENV["RAILS_ENV"] ||= "test"
require_relative "../config/environment"
require "rails/test_help"

+require "type_fusion/minitest"

class ActiveSupport::TestCase
  # ...
end

Configuration

Setup TypeFusion in an initializer

# config/initializers/type_fusion.rb

require "type_fusion"

TypeFusion.config do |config|

  # === application_name
  #
  # Set application_name to a string which is used to know where the samples
  # came from. Set application_name to an empty string if you wish to not
  # send the application name alongside the samples.
  #
  # Default: "TypeFusion"
  # Default when using Rails: Rails.application.class.module_parent_name
  #
  # config.application_name = "YourApplication"


  # === endpoint
  #
  # Set endpoint to an URL where TypeFusion should send the samples to.
  #
  # Default: "https://gem.sh/api/v1/types/samples"
  #
  # config.endpoint = "https://your-domain.com/api/v1/types/samples"


  # === type_sample_request
  #
  # Set type_sample_request to a lambda which resolves to true/false
  # to set if type sampling should be enabled for the whole rack request.
  #
  # Default: ->(rack_env) { [true, false, false, false].sample }
  #
  # config.type_sample_request = ->(rack_env) { [true, false, false, false].sample }


  # === type_sample_tracepoint_path
  #
  # Set type_sample_tracepoint_path to a lambda which resolves
  # to true/false to check if a tracepoint_path should be sampled
  # or not.
  #
  # This can be useful when you want to only sample method calls for
  # certain gems or want to exclude a gem from being sampled.
  #
  # Example:
  # config.type_sample_tracepoint_path = ->(tracepoint_path) {
  #   return false if tracepoint_path.include?("activerecord")
  #   return false if tracepoint_path.include?("sprockets")
  #   return false if tracepoint_path.include?("some-private-gem")
  #
  #   true
  # }
  #
  # Default: ->(tracepoint_path) { true }
  #
  # config.type_sample_tracepoint_path = ->(tracepoint_path) { true }


  # === type_sample_call_rate
  #
  # Set type_sample_call_rate to 1.0 to capture 100% of method calls
  # within a rack request.
  #
  # Default: 0.001
  #
  # config.type_sample_call_rate = 0.001
end

Usage

Type sample inside a block

TypeFusion.with_sampling do
  # run code you want to type sample here
end

Type sample globally

TypeFusion.start

# run code you want to type sample here

TypeFusion.stop

Retrieve the samples

TypeFusion::Sampler.instance.samples
# => [...]

TypeFusion::Sampler.instance.samples.first

# => #

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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 the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/marcoroth/type_fusion. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

Code of Conduct

Everyone interacting in the TypeFusion project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.