Rakefile

require 'http'
require 'json'
require 'bundler/gem_tasks'
require 'rspec/core/rake_task'
require 'rubocop/rake_task'

RSpec::Core::RakeTask.new :spec
RuboCop::RakeTask.new

task default: %i[spec rubocop]

desc 'Update VERSIONS file from GitHub releases'
task :versions do
  puts 'Fetching releases from GitHub...'

  versions = []
  page = 1

  loop do
    response = HTTP.get "https://api.github.com/repos/twbs/bootstrap/releases?per_page=100&page=#{page}"
    releases = JSON.parse response.body.to_s

    break if releases.empty?

    releases.each do |release|
      tag     = release['tag_name'].delete_prefix 'v'
      version = Gem::Version.new tag

      next if version.prerelease?

      versions << tag
    end

    page += 1
  end

  versions.sort_by! { Gem::Version.new it }

  versions_path = File.expand_path 'VERSIONS.txt', __dir__
  current       = File.readlines(versions_path, chomp: true).reject(&:empty?)
  new_versions  = versions - current

  if new_versions.empty?
    puts 'VERSIONS is up to date.'
  else
    File.write versions_path, "#{versions.join "\n"}\n"

    puts "Added #{new_versions.length} new version(s): #{new_versions.join ', '}"
  end
end