Class: Gem::Package

# File 'lib/rubygems/package.rb', line 148

def initialize gem, security_policy # :notnew:
  @gem = gem

  @build_time      = Time.now
  @checksums       = {}
  @contents        = nil
  @digests         = Hash.new { |h, algorithm| h[algorithm] = {} }
  @files           = nil
  @security_policy = security_policy
  @signatures      = {}
  @signer          = nil
  @spec            = nil
end

# File 'lib/rubygems/package.rb', line 98

attr_reader :files

# File 'lib/rubygems/package.rb', line 103

attr_accessor :security_policy

# File 'lib/rubygems/package.rb', line 533

def spec
  verify unless @spec

  @spec
end

# File 'lib/rubygems/package.rb', line 108

attr_writer :spec

# File 'lib/rubygems/package.rb', line 245

def build skip_validation = false
  Gem.load_yaml
  require 'rubygems/security'

  @spec.mark_version
  @spec.validate unless skip_validation

  setup_signer

  @gem.with_write_io do |gem_io|
    Gem::Package::TarWriter.new gem_io do |gem|
      add_metadata gem
      add_contents gem
      add_checksums gem
    end
  end

  say <<-EOM
Successfully built RubyGem
Name: #{@spec.name}
Version: #{@spec.version}
File: #{File.basename @spec.cache_file}
EOM
ensure
  @signer = nil
end

# File 'lib/rubygems/package.rb', line 275

def contents
  return @contents if @contents

  verify unless @spec

  @contents = []

  @gem.with_read_io do |io|
    gem_tar = Gem::Package::TarReader.new io

    gem_tar.each do |entry|
      next unless entry.full_name == 'data.tar.gz'

      open_tar_gz entry do |pkg_tar|
        pkg_tar.each do |contents_entry|
          @contents << contents_entry.full_name
        end
      end

      return @contents
    end
  end
end

# File 'lib/rubygems/package.rb', line 165

def copy_to path
  FileUtils.cp @gem.path, path unless File.exist? path
end

# File 'lib/rubygems/package.rb', line 334

def extract_files destination_dir, pattern = "*"
  verify unless @spec

  FileUtils.mkdir_p destination_dir

  @gem.with_read_io do |io|
    reader = Gem::Package::TarReader.new io

    reader.each do |entry|
      next unless entry.full_name == 'data.tar.gz'

      extract_tar_gz entry, destination_dir, pattern

      return # ignore further entries
    end
  end
end

# File 'lib/rubygems/package.rb', line 401

def gzip_to io # :yields: gz_io
  gz_io = Zlib::GzipWriter.new io, Zlib::BEST_COMPRESSION
  gz_io.mtime = @build_time

  yield gz_io
ensure
  gz_io.close
end

# File 'lib/rubygems/package.rb', line 450

def mkdir_p_safe mkdir, mkdir_options, destination_dir, file_name
  destination_dir = realpath File.expand_path(destination_dir)
  parts = mkdir.split(File::SEPARATOR)
  parts.reduce do |path, basename|
    path = realpath path  unless path == ""
    path = File.expand_path(path + File::SEPARATOR + basename)
    lstat = File.lstat path rescue nil
    if !lstat || !lstat.directory?
      unless normalize_path(path).start_with? normalize_path(destination_dir) and (FileUtils.mkdir path, mkdir_options rescue false)
        raise Gem::Package::PathError.new(file_name, destination_dir)
      end
    end
    path
  end
end

# File 'lib/rubygems/package.rb', line 442

def normalize_path(pathname)
  if Gem.win_platform?
    pathname.downcase
  else
    pathname
  end
end

# File 'lib/rubygems/package.rb', line 499

def read_checksums gem
  Gem.load_yaml

  @checksums = gem.seek 'checksums.yaml.gz' do |entry|
    Zlib::GzipReader.wrap entry do |gz_io|
      Gem::SafeYAML.safe_load gz_io.read
    end
  end
end

# File 'lib/rubygems/package.rb', line 661

def realpath file
  File.realpath file
end

# File 'lib/rubygems/package.rb', line 513

def setup_signer
  passphrase = ENV['GEM_PRIVATE_KEY_PASSPHRASE']
  if @spec.signing_key then
    @signer = Gem::Security::Signer.new @spec.signing_key, @spec.cert_chain, passphrase
    @spec.signing_key = nil
    @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_s }
  else
    @signer = Gem::Security::Signer.new nil, nil, passphrase
    @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_pem } if
      @signer.cert_chain
  end
end

# File 'lib/rubygems/package.rb', line 549

def verify
  @files     = []
  @spec      = nil

  @gem.with_read_io do |io|
    Gem::Package::TarReader.new io do |reader|
      read_checksums reader

      verify_files reader
    end
  end

  verify_checksums @digests, @checksums

  @security_policy.verify_signatures @spec, @digests, @signatures if
    @security_policy

  true
rescue Gem::Security::Exception
  @spec = nil
  @files = []
  raise
rescue Errno::ENOENT => e
  raise Gem::Package::FormatError.new e.message
rescue Gem::Package::TarInvalidError => e
  raise Gem::Package::FormatError.new e.message, @gem
end

# File 'lib/rubygems/package.rb', line 599

def verify_entry entry
  file_name = entry.full_name
  @files << file_name

  case file_name
  when /\.sig$/ then
    @signatures[$`] = entry.read if @security_policy
    return
  else
    digest entry
  end

  case file_name
  when /^metadata(.gz)?$/ then
    load_spec entry
  when 'data.tar.gz' then
    verify_gz entry
  end
rescue => e
  message = "package is corrupt, exception while verifying: " +
            "#{e.message} (#{e.class})"
  raise Gem::Package::FormatError.new message, @gem
end

# File 'lib/rubygems/package.rb', line 626

def verify_files gem
  gem.each do |entry|
    verify_entry entry
  end

  unless @spec then
    raise Gem::Package::FormatError.new 'package metadata is missing', @gem
  end

  unless @files.include? 'data.tar.gz' then
    raise Gem::Package::FormatError.new \
            'package content (data.tar.gz) is missing', @gem
  end

  if duplicates = @files.group_by {|f| f }.select {|k,v| v.size > 1 }.map(&:first) and duplicates.any?
    raise Gem::Security::Exception, "duplicate files in the package: (#{duplicates.map(&:inspect).join(', ')})"
  end
end