Class: Berkshelf::Downloader

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/berkshelf/downloader.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(berksfile) ⇒ Downloader

Returns a new instance of Downloader.

Parameters:


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# File 'lib/berkshelf/downloader.rb', line 14

def initialize(berksfile)
  @berksfile = berksfile
end

Instance Attribute Details

#berksfileObject (readonly)

Returns the value of attribute berksfile


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# File 'lib/berkshelf/downloader.rb', line 9

def berksfile
  @berksfile
end

Instance Method Details

#download(*args, &block) ⇒ String

Download the given Berkshelf::Dependency. If the optional block is given, the temporary path to the cookbook is yielded and automatically deleted when the block returns. If no block is given, it is the responsibility of the caller to remove the tmpdir.

Parameters:

  • name (String)
  • version (String)
  • options (Hash)

    a customizable set of options

Returns:

Raises:


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# File 'lib/berkshelf/downloader.rb', line 31

def download(*args, &block)
  options = args.last.is_a?(Hash) ? args.pop : Hash.new
  dependency, version = args

  sources.each do |source|
    if result = try_download(source, dependency, version)
      if block_given?
        value = yield result
        FileUtils.rm_rf(result)
        return value
      end

      return result
    end
  end

  raise CookbookNotFound.new(dependency, version, 'in any of the sources')
end

#try_download(source, name, version) ⇒ String

Parameters:

Returns:


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# File 'lib/berkshelf/downloader.rb', line 55

def try_download(source, name, version)
  unless remote_cookbook = source.cookbook(name, version)
    return nil
  end

  case remote_cookbook.location_type
  when :opscode, :supermarket
    CommunityREST.new(remote_cookbook.location_path).download(name, version)
  when :chef_server
    # @todo Dynamically get credentials for remote_cookbook.location_path
    credentials = {
      server_url: remote_cookbook.location_path,
      client_name: Berkshelf::Config.instance.chef.node_name,
      client_key: Berkshelf::Config.instance.chef.client_key,
      ssl: {
        verify: Berkshelf::Config.instance.ssl.verify
      }
    }
    # @todo  Something scary going on here - getting an instance of Kitchen::Logger from test-kitchen
    # https://github.com/opscode/test-kitchen/blob/master/lib/kitchen.rb#L99
    Celluloid.logger = nil unless ENV["DEBUG_CELLULOID"]
    Ridley.open(credentials) { |r| r.cookbook.download(name, version) }
  when :github
    require 'octokit' unless defined?(Octokit)

    tmp_dir      = Dir.mktmpdir
    archive_path = File.join(tmp_dir, "#{name}-#{version}.tar.gz")
    unpack_dir   = File.join(tmp_dir, "#{name}-#{version}")

    # Find the correct github connection options for this specific cookbook.
    cookbook_uri = URI.parse(remote_cookbook.location_path)
    if cookbook_uri.host == "github.com"
      options = Berkshelf::Config.instance.github.detect { |opts| opts["web_endpoint"] == nil }
      options = {} if options == nil
    else
      options = Berkshelf::Config.instance.github.detect { |opts| opts["web_endpoint"] == "#{cookbook_uri.scheme}://#{cookbook_uri.host}" }
      raise ConfigurationError.new "Missing github endpoint configuration for #{cookbook_uri.scheme}://#{cookbook_uri.host}" if options == nil
    end

    github_client = Octokit::Client.new(access_token: options[:access_token],
      api_endpoint: options[:api_endpoint], web_endpoint: options[:web_endpoint],
      connection_options: {ssl: {verify: options[:ssl_verify].nil? ? true : options[:ssl_verify]}})

    begin
      url = URI(github_client.archive_link(cookbook_uri.path.gsub(/^\//, ""), ref: "v#{version}"))
    rescue Octokit::Unauthorized
      return nil
    end

    Net::HTTP.start(url.host, use_ssl: url.scheme == "https",
      verify_mode: (options[:ssl_verify].nil? || options[:ssl_verify]) ? OpenSSL::SSL::VERIFY_PEER : OpenSSL::SSL::VERIFY_NONE) do |http|
      resp = http.get(url.request_uri)
      return nil unless resp.is_a?(Net::HTTPSuccess)
      open(archive_path, "wb") { |file| file.write(resp.body) }
    end

    tgz = Zlib::GzipReader.new(File.open(archive_path, "rb"))
    Archive::Tar::Minitar.unpack(tgz, unpack_dir)

    # we need to figure out where the cookbook is located in the archive. This is because the directory name
    # pattern is not cosistant between private and public github repositories
    cookbook_directory = Dir.entries(unpack_dir).select do |f|
      (! f.start_with?('.')) && (Pathname.new(File.join(unpack_dir, f)).cookbook?)
    end[0]

    File.join(unpack_dir, cookbook_directory)
  when :uri
    require 'open-uri' unless defined?(OpenURI)

    tmp_dir      = Dir.mktmpdir
    archive_path = Pathname.new(tmp_dir) + "#{name}-#{version}.tar.gz"
    unpack_dir   = Pathname.new(tmp_dir) + "#{name}-#{version}"

    url = remote_cookbook.location_path
    open(url, 'rb') do |remote_file|
      archive_path.open('wb') { |local_file| local_file.write remote_file.read }
    end

    archive_path.open('rb') do |file|
      tgz = Zlib::GzipReader.new(file)
      Archive::Tar::Minitar.unpack(tgz, unpack_dir.to_s)
    end

    # The top level directory is inconsistant. So we unpack it and
    # use the only directory created in the unpack_dir.
    cookbook_directory = unpack_dir.entries.select do |filename|
      (! filename.to_s.start_with?('.')) && (unpack_dir + filename).cookbook?
    end.first

    (unpack_dir + cookbook_directory).to_s
  when :file_store
    tmp_dir = Dir.mktmpdir
    FileUtils.cp_r(remote_cookbook.location_path, tmp_dir)
    File.join(tmp_dir, name)
  else
    raise RuntimeError, "unknown location type #{remote_cookbook.location_type}"
  end
rescue CookbookNotFound
  nil
end