Grape の routes 出すやつ

Rakefile

namespace :api do
  desc 'API Routes'
  task routes: :environment do
    routes = API.routes
    headers = ['Version', 'Method', 'Path']
    widths = [
      routes.map { |r| r.route_version.size }.max || 0,
      routes.map { |r| r.route_method.size  }.max || 0,
      routes.map { |r| r.route_path.size    }.max || 0
    ]
    version_width, method_width, path_width = widths.zip(headers.map(&:size)).map(&:max)
    puts [
      'Version'.rjust(version_width),
      'Method'.ljust(method_width),
      'Path'.ljust(path_width),
    ].join('  ')
    routes.each do |r|
      puts [
        r.route_version.rjust(version_width),
        r.route_method.ljust(method_width),
        r.route_path.ljust(path_width),
      ].join('  ')
    end
  end
end