Deploy Verifier Example

gistfile1.rb

require 'typhoeus'

class DeployVerifier
  def self.verify(asset_paths)
    urls = asset_urls(asset_paths)

    return 'No assets found' if urls.empty?
    verify_urls(urls.uniq, &blk)
  end

  private

  def self.verify_urls(urls)
    hydra = Typhoeus::Hydra.hydra
    errors = []

    urls.each do |link|
      request = Typhoeus::Request.new(link, method: "HEAD")
      request.on_complete do |response|
        if response.success?
          yield response.request.url, response.success?, nil if block_given?
        else
          error = interpret_failure(response)
          yield response.request.url, response.success?, error if block_given?
          errors << {link: link, error: error}
        end
      end
      hydra.queue request
    end

    hydra.run #blocks
    errors
  end
end

errors = DeployVerifier.verify(['assets/script-abc123.js','assets/styles-def987.css'])

if errors.any?
  puts "Assets unavailable:"
  puts errors.join("\n")
  abort "Assets not available. Stopping deploy"
end