Port the existing functionality from hats to this gem

.github/workflows/main.yml

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+name: Ruby
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Ruby ${{ matrix.ruby }}
+    strategy:
+      matrix:
+        ruby:
+          - '3.0.5'
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - name: Run the default task
+      run: bundle exec rake

.gitignore

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+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+
+# rspec failure tracking
+.rspec_status

.rspec

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+--format documentation
+--color
+--require spec_helper

.rubocop.yml

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+AllCops:
+  TargetRubyVersion: 2.6
+
+Style/StringLiterals:
+  Enabled: true
+  EnforcedStyle: double_quotes
+
+Style/StringLiteralsInInterpolation:
+  Enabled: true
+  EnforcedStyle: double_quotes
+
+Layout/LineLength:
+  Max: 120

Gemfile

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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# Specify your gem's dependencies in degica_datadog.gemspec
+gemspec
+
+gem "rake", "~> 13.0"
+
+gem "rspec", "~> 3.0"
+
+gem "rubocop", "~> 1.21"

Gemfile.lock

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+PATH
+  remote: .
+  specs:
+    degica_datadog (0.1.0)
+      ddtrace (~> 1.0)
+      dogstatsd-ruby (~> 5)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.2)
+    datadog-ci (0.5.1)
+      msgpack
+    ddtrace (1.18.0)
+      datadog-ci (~> 0.5.0)
+      debase-ruby_core_source (= 3.2.3)
+      libdatadog (~> 5.0.0.1.0)
+      libddwaf (~> 1.14.0.0.0)
+      msgpack
+    debase-ruby_core_source (3.2.3)
+    diff-lcs (1.5.0)
+    dogstatsd-ruby (5.6.1)
+    ffi (1.16.3)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
+    libdatadog (5.0.0.1.0)
+    libddwaf (1.14.0.0.0-arm64-darwin)
+      ffi (~> 1.0)
+    msgpack (1.7.2)
+    parallel (1.23.0)
+    parser (3.2.2.4)
+      ast (~> 2.4.1)
+      racc
+    racc (1.7.3)
+    rainbow (3.1.1)
+    rake (13.1.0)
+    regexp_parser (2.8.3)
+    rexml (3.2.6)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rubocop (1.59.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.2.2.4)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.30.0)
+      parser (>= 3.2.1.0)
+    ruby-progressbar (1.13.0)
+    unicode-display_width (2.5.0)
+
+PLATFORMS
+  arm64-darwin-22
+
+DEPENDENCIES
+  degica_datadog!
+  rake (~> 13.0)
+  rspec (~> 3.0)
+  rubocop (~> 1.21)
+
+BUNDLED WITH
+   2.2.33

README.md

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+# DegicaDatadog
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/degica_datadog`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'degica_datadog'
+```
+
+And then execute:
+
+    $ bundle install
+
+Or install it yourself as:
+
+    $ gem install degica_datadog
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+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 the created tag, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/sulami/degica_datadog.

Rakefile

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+# frozen_string_literal: true
+
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+require "rubocop/rake_task"
+
+RuboCop::RakeTask.new
+
+task default: %i[spec rubocop]

bin/console

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+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "degica_datadog"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start(__FILE__)

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

degica_datadog.gemspec

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+# frozen_string_literal: true
+
+require_relative "lib/degica_datadog/version"
+
+Gem::Specification.new do |spec|
+  spec.name = "degica_datadog"
+  spec.version = DegicaDatadog::VERSION
+  spec.authors = ["Robin Schroer"]
+  spec.email = ["[email protected]"]
+
+  spec.summary = "Datadog statsd & tracing utitlities for Degica services"
+  spec.homepage = "https://github.com/degica/degica_datadog"
+  spec.required_ruby_version = ">= 2.6.0"
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = spec.homepage
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
+    `git ls-files -z`.split("\x0").reject do |f|
+      (f == __FILE__) || f.match(%r{\A(?:(?:test|spec|features)/|\.(?:git|travis|circleci)|appveyor)})
+    end
+  end
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "ddtrace", "~> 1.0"
+  spec.add_dependency "dogstatsd-ruby", "~> 5"
+end

lib/degica_datadog.rb

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+# frozen_string_literal: true
+
+require_relative "degica_datadog/config"
+require_relative "degica_datadog/statsd"
+require_relative "degica_datadog/tracing"
+require_relative "degica_datadog/version"
+
+# Standardised interactions with Datadog.
+module DegicaDatadog
+end

lib/degica_datadog/config.rb

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+# frozen_string_literal: true
+
+require "datadog/statsd"
+require "json"
+require "uri"
+
+module DegicaDatadog
+  # Configuration for the Datadog agent.
+  module Config
+    class << self
+      def enabled?
+        %w[production staging].include?(environment) || ENV.fetch("DD_AGENT_URI", nil)
+      end
+
+      def statsd_client
+        @statsd_client ||= Datadog::Statsd.new(datadog_agent_host, statsd_port)
+      end
+
+      def service
+        ENV.fetch("SERVICE_NAME", nil)
+      end
+
+      def version
+        ENV.fetch("_GIT_REVISION", nil)
+      end
+
+      def environment
+        ENV.fetch("RAILS_ENV", nil)
+      end
+
+      # URI including http:// prefix & port for the tracing endpoint, or nil.
+      def datadog_agent_uri
+        return unless enabled?
+
+        ecs_meta_file = ENV.fetch("ECS_CONTAINER_METADATA_FILE", nil)
+        if ecs_meta_file
+          host_ip = JSON.parse(File.read(ecs_meta_file))&.dig("HostPrivateIPv4Address")
+          return URI.parse(format("http://%s:9126", host_ip)) if host_ip
+        end
+
+        env_uri = ENV.fetch("DD_AGENT_URI", nil)
+        URI.parse(env_uri) unless env_uri.nil?
+      end
+
+      def datadog_agent_host
+        datadog_agent_uri&.host || "localhost"
+      end
+
+      def statsd_port
+        tracing_port - 1
+      end
+
+      def tracing_port
+        datadog_agent_uri&.port || 8126
+      end
+    end
+  end
+end