Coveralls Reborn for Ruby 
An up-to-date fork of lemurheavy/coveralls-ruby
Add to your Gemfile:
gem 'coveralls_reborn', '~> 0.27.0', require: falsePsst... you don't need this gem on GitHub Actions.
For a Rails application, just add
gem 'simplecov-lcov', '~> 0.8.0'to your Gemfile and
require 'simplecov'
SimpleCov.start 'rails' do
if ENV['CI']
require 'simplecov-lcov'
SimpleCov::Formatter::LcovFormatter.config do |c|
c.report_with_single_file = true
c.single_report_path = 'coverage/lcov.info'
end
formatter SimpleCov::Formatter::LcovFormatter
end
add_filter %w[version.rb initializer.rb]
endat the top of spec_helper.rb / rails_helper.rb / test_helper.rb.
Then follow instructions at Coveralls GitHub Action
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