class Bundler::ParallelInstaller

Public Class Methods

call(*args) click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 73
def self.call(*args)
  new(*args).call
end
max_threads() click to toggle source

Returns max number of threads machine can handle with a min of 1

# File lib/bundler/installer/parallel_installer.rb, line 78
def self.max_threads
  [Bundler.settings[:jobs].to_i - 1, 1].max
end
new(installer, all_specs, size, standalone, force) click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 82
def initialize(installer, all_specs, size, standalone, force)
  @installer = installer
  @size = size
  @standalone = standalone
  @force = force
  @specs = all_specs.map {|s| SpecInstallation.new(s) }
end

Public Instance Methods

call() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 90
def call
  enqueue_specs
  process_specs until @specs.all?(&:installed?) || @specs.any?(&:failed?)
  handle_error if @specs.any?(&:failed?)
  @specs
ensure
  worker_pool && worker_pool.stop
end
enqueue_specs() click to toggle source

Keys in the remains hash represent uninstalled gems specs. We enqueue all gem specs that do not have any dependencies. Later we call this lambda again to install specs that depended on previously installed specifications. We continue until all specs are installed.

# File lib/bundler/installer/parallel_installer.rb, line 139
def enqueue_specs
  @specs.select(&:ready_to_enqueue?).each do |spec|
    if spec.dependencies_installed? @specs
      spec.state = :enqueued
      worker_pool.enq spec
    end
  end
end
handle_error() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 126
def handle_error
  errors = @specs.select(&:failed?).map(&:error)
  if exception = errors.find {|e| e.is_a?(Bundler::BundlerError) }
    raise exception
  end
  raise Bundler::InstallError, errors.map(&:to_s).join("\n\n")
end
process_specs() click to toggle source

Dequeue a spec and save its post-install message and then enqueue the remaining specs. Some specs might've had to wait til this spec was installed to be processed so the call to `enqueue_specs` is important after every dequeue.

# File lib/bundler/installer/parallel_installer.rb, line 120
def process_specs
  spec = worker_pool.deq
  spec.state = :installed unless spec.failed?
  enqueue_specs
end
worker_pool() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 99
def worker_pool
  @worker_pool ||= Bundler::Worker.new @size, "Parallel Installer", lambda { |spec_install, worker_num|
    gem_installer = Bundler::GemInstaller.new(
      spec_install.spec, @installer, @standalone, worker_num, @force
    )
    success, message = gem_installer.install_from_spec
    if success && !message.nil?
      spec_install.post_install_message = message
    elsif !success
      spec_install.state = :failed
      spec_install.error = message
    end
    spec_install
  }
end