class CliCoverage
  def self.conditionally_activate
    if ENV["COVERAGE"]
      require "simplecov"

      # Collect coverage separately
      SimpleCov.command_name "#{ENV['COVERAGE']} #{ARGV.join(' ')} coverage"

      # Silence output
      SimpleCov.formatter = SimpleCov::Formatter::SimpleFormatter
      SimpleCov.print_error_status = false

      # Ensure SimpleCov doesn't filter out all out code
      project_root = File.expand_path("..", __dir__)
      SimpleCov.root project_root
    end
  end
end