Class: Snowball::Roller

Inherits:
Object
  • Object
show all
Defined in:
lib/snowball/roller.rb

Class Method Summary collapse

Class Method Details

.roll(entry, opts) ⇒ Object



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# File 'lib/snowball/roller.rb', line 8

def self.roll(entry, opts)
  args = []

  ignores = opts[:ignores].dup
  ignores.unshift *%w(jsdom xmlhttprequest location navigator)
  ignores.uniq!

  args << ignores.map { |node_module| "--ignore #{node_module}" }.join(" ")
  args << opts[:includes].map { |node_module| "--require #{node_module}" }.join(" ")
  args << "--prelude #{!!opts[:prelude]}"
  args << "--entry #{entry}"
  args << "--raw" if opts[:raw]

  args += (opts[:env] || {}).map do |k,v|
    "--env #{k}=#{v}"
  end

  cmd = "node #{EXECUTABLE} #{args.join(" ")}"

  Open3.popen3(cmd) do |stdin, stdout, stderr, wait_thr|
    source = stdout.read
    unless wait_thr.value.success?
      raise RollError.new "Got error while executing \"#{cmd}\" command: #{stderr.read}"
    end
    return source
  end
end