Rakefile

require 'bundler'
Bundler::GemHelper.install_tasks

require 'rspec/core/rake_task'

RSpec::Core::RakeTask.new(:spec)

require 'rubocop/rake_task'

RuboCop::RakeTask.new(:rubocop)

task default: %i(spec proof_readme)

task :proof_readme do
  require 'html-proofer'
  require 'redcarpet'

  renderer = Redcarpet::Render::HTML.new \
    with_toc_data: true
  redcarpet = Redcarpet::Markdown.new(renderer)
  html = redcarpet.render File.read('README.md')

  mkdir_p 'out'
  File.write('out/README.html', html)

  opts = {
    url_ignore: [/badge.fury.io/, /codecov.io/]
  }
  HTMLProofer.check_directory('./out', opts).run
end