module Bundler

def app_cache
  root.join("vendor/cache")
end

def bin_path
  @bin_path ||= begin
    path = settings[:bin] || "bin"
    path = Pathname.new(path).expand_path(root)
    FileUtils.mkdir_p(path)
    Pathname.new(path).expand_path
  end
end

def bundle_path
  # STDERR.puts settings.path
  @bundle_path ||= Pathname.new(settings.path).expand_path(root)
end

def cache
  bundle_path.join("cache/bundler")
end

def configure
  @configured ||= begin
    configure_gem_home_and_path
    true
  end
end

def configure_gem_home_and_path
  if settings[:disable_shared_gems]
    ENV['GEM_PATH'] = ''
    ENV['GEM_HOME'] = File.expand_path(bundle_path, root)
  else
    paths = [Gem.dir, Gem.path].flatten.compact.uniq.reject{|p| p.empty? }
    ENV["GEM_PATH"] = paths.join(File::PATH_SEPARATOR)
    ENV["GEM_HOME"] = bundle_path.to_s
  end
  Gem.clear_paths
end

def default_gemfile
  SharedHelpers.default_gemfile
end

def definition(unlock = nil)
  @definition = nil if unlock
  @definition ||= begin
    configure
    upgrade_lockfile
    lockfile = root.join("Gemfile.lock")
    Definition.build(default_gemfile, lockfile, unlock)
  end
end

def environment
  Bundler::Environment.new(root, definition)
end

def home
  bundle_path.join("bundler")
end

def install_path
  home.join("gems")
end

def load
  @load ||= Runtime.new(root, definition)
end

def mkdir_p(path)
  if requires_sudo?
    sudo "mkdir -p '#{path}'"
  else
    FileUtils.mkdir_p(path)
  end
end

def require(*groups)
  setup(*groups).require(*groups)
end

def requires_sudo?
  path = bundle_path
  path = path.parent until path.exist?
  case
  when File.writable?(path) ||
       `which sudo 2>#{NULL}`.empty? ||
       File.owned?(path)
    false
  else
    true
  end
end

def root
  default_gemfile.dirname.expand_path
end

def ruby_scope
  "#{Gem.ruby_engine}/#{Gem::ConfigMap[:ruby_version]}"
end

def settings
  @settings ||= Settings.new(root)
end

def setup(*groups)
  return @setup if defined?(@setup) && @setup
  if groups.empty?
    # Load all groups, but only once
    @setup = load.setup
  else
    # Figure out which groups haven't been loaded yet
    unloaded = groups - (@completed_groups || [])
    # Record groups that are now loaded
    @completed_groups = groups | (@completed_groups || [])
    # Load any groups that are not yet loaded
    unloaded.any? ? load.setup(*unloaded) : load
  end
end

def specs_path
  bundle_path.join("specifications")
end

def sudo(str)
  `sudo -p 'Enter your password to install the bundled RubyGems to your system: ' -E #{str}`
end

def tmp
  user_bundle_path.join("tmp")
end

def ui
  @ui ||= UI.new
end

def upgrade_lockfile
  lockfile = root.join("Gemfile.lock")
  if lockfile.exist? && lockfile.read(3) == "---"
    Bundler.ui.warn "Detected Gemfile.lock generated by 0.9, deleting..."
    lockfile.rmtree
    # lock = YAML.load_file(lockfile)
    #
    # source_uris = lock["sources"].map{|s| s["Rubygems"]["uri"] }
    # sources = [Bundler::Source::Rubygems.new({"remotes" => source_uris})]
    #
    # deps = lock["dependencies"].map do |name, opts|
    #   version = opts.delete("version")
    #   Bundler::Dependency.new(name, version, opts)
    # end
    #
    # definition = Bundler::Definition.new(nil, deps, sources, {})
    #
    # File.open(lockfile, 'w') do |f|
    #   f.write definition.to_lock
    # end
  end
end

def user_bundle_path
  Pathname.new(Gem.user_home).join(".bundler")
end

def with_clean_env
  bundled_env = ENV.to_hash
  ENV.replace(ORIGINAL_ENV)
  yield
ensure
  ENV.replace(bundled_env.to_hash)
end