Class: Sprockets::Manifest

Inherits:
Object
  • Object
show all
Defined in:
lib/sprockets-derailleur/manifest.rb

Instance Method Summary collapse

Instance Method Details

#compile(*args) ⇒ Object 



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# File 'lib/sprockets-derailleur/manifest.rb', line 6

def compile(*args)
  worker_count = SprocketsDerailleur::worker_count
  paths_with_errors = {}

  time = Benchmark.measure do
    paths = environment.each_logical_path(*args).to_a +
      args.flatten.select { |fn| Pathname.new(fn).absolute? if fn.is_a?(String)}

    # Skip all files without extensions, see
    # https://github.com/sstephenson/sprockets/issues/347 for more info
    paths = paths.select do |path|

      if File.extname(path) == ""
        logger.info "Skipping #{path} since it has no extension"
        false
      else
        true
      end
    end

    logger.warn "Initializing #{worker_count} workers"

    workers = []
    worker_count.times do
      workers << worker(paths)
    end

    reads = workers.map{|worker| worker[:read]}
    writes = workers.map{|worker| worker[:write]}

    index = 0
    finished = 0

    loop do
      break if finished >= paths.size

      ready = IO.select(reads, writes)

      ready[0].each do |readable|
        data = Marshal.load(readable)
        assets.merge! data["assets"]
        files.merge! data["files"]
        paths_with_errors.merge! data["errors"]

        finished += 1
      end

      ready[1].each do |write|
        break if index >= paths.size

        Marshal.dump(index, write)
        index += 1
      end
    end

    logger.debug "Cleaning up workers"

    workers.each do |worker|
      worker[:read].close
      worker[:write].close
    end

    workers.each do |worker|
      Process.wait worker[:pid]
    end

    save
  end

  logger.warn "Completed compiling assets (#{(time.real * 100).round / 100.0}s)"

  unless paths_with_errors.empty?
    logger.warn "Asset paths with errors:"

    paths_with_errors.each do |path, message|
      logger.warn "\t#{path}: #{message}"
    end
  end
end

#compile_with_workers ⇒ Object 



5
 
# File 'lib/sprockets-derailleur/manifest.rb', line 5

alias_method :compile_with_workers, :compile

#worker(paths) ⇒ Object 



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# File 'lib/sprockets-derailleur/manifest.rb', line 86

def worker(paths)
  child_read, parent_write = IO.pipe
  parent_read, child_write = IO.pipe

  pid = fork do
    begin
      parent_write.close
      parent_read.close

      while !child_read.eof?
        path = paths[Marshal.load(child_read)]

        time = Benchmark.measure do
          data = {'assets' => {}, 'files' => {}, 'errors' => {}}

          if asset = find_asset(path)

            data['files'][asset.digest_path] = {
              'logical_path' => asset.logical_path,
              'mtime'        => asset.mtime.iso8601,
              'size'         => asset.length,
              'digest'       => asset.digest
            }
            data['assets'][asset.logical_path] = asset.digest_path

            target = File.join(dir, asset.digest_path)

            if File.exist?(target)
              logger.debug "Skipping #{target}, already exists"
            else
              logger.debug "Writing #{target}"
              asset.write_to target
              asset.write_to "#{target}.gz" if asset.is_a?(BundledAsset)
            end

            Marshal.dump(data, child_write)
          else
            data['errors'][path] = "Not found"
            Marshal.dump(data, child_write)
          end
        end

        logger.debug "Compiled #{path} (#{(time.real * 1000).round}ms, pid #{Process.pid})"
      end
    ensure
      child_read.close
      child_write.close
    end
  end

  child_read.close
  child_write.close

  {:read => parent_read, :write => parent_write, :pid => pid}
end