Module: Critical

Defined in:
lib/critical.rb,
lib/critical/version.rb

Overview

Calls the npm package “critical”. See: github.com/addyosmani/critical

Constant Summary collapse

GEM_ROOT = 
File.expand_path('..', File.dirname(__FILE__)).freeze
VERSION = 
'0.1.2'
CRITICAL_VERSION = 
'0.8.4'

Class Method Summary collapse

Class Method Details

.generate(options) ⇒ Object

For more information and available options, see: github.com/addyosmani/critical



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# File 'lib/critical.rb', line 14

def self.generate(options)
  out, err, st = Dir.chdir(GEM_ROOT) do
    Open3.capture3('node', 'lib/critical-wrapper.js', JSON.dump(options))
  end
  if !st.exitstatus.zero? || out.empty? && !err.empty?
    STDOUT.puts out
    STDERR.puts err
    fail "Failed to get critical CSS for:\n" +
         JSON.pretty_generate(options)
  end
  out
end