class Bundler::ParallelInstaller

Attributes

size[R]

Public Class Methods

call(*args) click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 75
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 80
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 86
def initialize(installer, all_specs, size, standalone, force)
  @installer = installer
  @size = size
  @standalone = standalone
  @force = force
  @specs = all_specs.map {|s| SpecInstallation.new(s) }
  @spec_set = all_specs
end

Public Instance Methods

call() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 95
def call
  # Since `autoload` has the potential for threading issues on 1.8.7
  # TODO:  remove in bundler 2.0
  require "bundler/gem_remote_fetcher" if RUBY_VERSION < "1.9"

  check_for_corrupt_lockfile
  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
check_for_corrupt_lockfile() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 144
def check_for_corrupt_lockfile
  missing_dependencies = @specs.map do |s|
    [
      s,
      s.missing_lockfile_dependencies(@specs.map(&:name)),
    ]
  end.reject { |a| a.last.empty? }
  return if missing_dependencies.empty?

  warning = []
  warning << "Your lockfile was created by an old Bundler that left some things out."
  if @size != 1
    warning << "Because of the missing DEPENDENCIES, we can only install gems one at a time, instead of installing #{@size} at a time."
    @size = 1
  end
  warning << "You can fix this by adding the missing gems to your Gemfile, running bundle install, and then removing the gems from your Gemfile."
  warning << "The missing gems are:"

  missing_dependencies.each do |spec, missing|
    warning << "* #{missing.map(&:name).join(", ")} depended upon by #{spec.name}"
  end

  Bundler.ui.warn(warning.join("\n"))
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 187
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 136
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 130
def process_specs
  spec = worker_pool.deq
  spec.state = :installed unless spec.failed?
  enqueue_specs
end
require_tree_for_spec(spec) click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 169
def require_tree_for_spec(spec)
  tree = @spec_set.what_required(spec)
  t = String.new("In #{File.basename(SharedHelpers.default_gemfile)}:\n")
  tree.each_with_index do |s, depth|
    t << "  " * depth.succ << s.name
    unless tree.last == s
      t << %Q( was resolved to #{s.version}, which depends on)
    end
    t << %Q(\n)
  end
  t
end
worker_pool() click to toggle source
# File lib/bundler/installer/parallel_installer.rb, line 109
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}\n\n#{require_tree_for_spec(spec_install.spec)}"
    end
    spec_install
  }
end