class Sprockets::ERBProcessor

def self.call(input)
  instance.call(input)
end

def self.instance
  @instance ||= new
end

def call(input)
  match = ERB.version.match(/\Aerb\.rb \[(?<version>[^ ]+) /)
  if match && match[:version] >= "2.2.0" # Ruby 2.6+
    engine = ::ERB.new(input[:data], trim_mode: '<>')
  else
    engine = ::ERB.new(input[:data], nil, '<>')
  end
  engine.filename = input[:filename]
  context = input[:environment].context_class.new(input)
  klass = (class << context; self; end)
  klass.const_set(:ENV, context.env_proxy)
  klass.class_eval(&@block) if @block
  data = engine.result(context.instance_eval('binding'))
  context.metadata.merge(data: data)
end

def initialize(&block)
  @block = block
end