Class: Gem::Package
- Inherits:
-
Object
- Object
- Gem::Package
- Includes:
- UserInteraction
- Defined in:
- lib/rubygems/package.rb
Direct Known Subclasses
Defined Under Namespace
Classes: DigestIO, Error, FormatError, NonSeekableIO, Old, PathError, TarHeader, TarInvalidError, TarReader, TarTestCase, TarWriter, TooLongFileName
Instance Attribute Summary collapse
-
#build_time ⇒ Object
:nodoc:.
-
#checksums ⇒ Object
readonly
Checksums for the contents of the package.
-
#files ⇒ Object
readonly
The files in this package.
-
#security_policy ⇒ Object
The security policy used for verifying the contents of this package.
-
#spec ⇒ Object
The spec for this gem.
Class Method Summary collapse
- .build(spec, skip_validation = false) ⇒ Object
-
.new(gem) ⇒ Object
Creates a new Gem::Package for the file at
gem
.
Instance Method Summary collapse
-
#add_checksums(tar) ⇒ Object
Adds a checksum for each entry in the gem to checksums.yaml.gz.
-
#add_contents(tar) ⇒ Object
Adds the files listed in the packages’s Gem::Specification to data.tar.gz and adds this file to the
tar
. -
#add_files(tar) ⇒ Object
Adds files included the package’s Gem::Specification to the
tar
file. -
#add_metadata(tar) ⇒ Object
Adds the package’s Gem::Specification to the
tar
file. -
#build(skip_validation = false) ⇒ Object
Builds this package based on the specification set by #spec=.
-
#contents ⇒ Object
A list of file names contained in this gem.
-
#digest(entry) ⇒ Object
Creates a digest of the TarEntry
entry
from the digest algorithm set by the security policy. -
#extract_files(destination_dir) ⇒ Object
Extracts the files in this package into
destination_dir
. -
#extract_tar_gz(io, destination_dir) ⇒ Object
Extracts all the files in the gzipped tar archive
io
intodestination_dir
. -
#gzip_to(io) ⇒ Object
Gzips content written to
gz_io
toio
. -
#initialize(gem) ⇒ Package
constructor
Creates a new package that will read or write to the file
gem
. -
#install_location(filename, destination_dir) ⇒ Object
Returns the full path for installing
filename
. -
#load_spec(entry) ⇒ Object
Loads a Gem::Specification from the TarEntry
entry
. -
#open_tar_gz(io) ⇒ Object
Opens
io
as a gzipped tar archive. -
#read_checksums(gem) ⇒ Object
Reads and loads checksums.yaml.gz from the tar file
gem
. -
#setup_signer ⇒ Object
Prepares the gem for signing and checksum generation.
-
#verify ⇒ Object
Verifies that this gem:.
-
#verify_checksums(digests, checksums) ⇒ Object
Verifies the
checksums
against thedigests
. -
#verify_files(gem) ⇒ Object
Verifies the files of the
gem
. -
#verify_gz(entry) ⇒ Object
Verifies that
entry
is a valid gzipped file.
Methods included from UserInteraction
#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction
Methods included from DefaultUserInteraction
ui, #ui, ui=, #ui=, use_ui, #use_ui
Constructor Details
#initialize(gem) ⇒ Package
Creates a new package that will read or write to the file gem
.
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# File 'lib/rubygems/package.rb', line 137 def initialize gem # :notnew: @gem = gem @build_time = Time.now @checksums = {} @contents = nil @digests = Hash.new { |h, algorithm| h[algorithm] = {} } @files = nil @security_policy = nil @signatures = {} @signer = nil @spec = nil end |
Instance Attribute Details
#build_time ⇒ Object
:nodoc:
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# File 'lib/rubygems/package.rb', line 83 def build_time @build_time end |
#checksums ⇒ Object (readonly)
Checksums for the contents of the package
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# File 'lib/rubygems/package.rb', line 88 def checksums @checksums end |
#files ⇒ Object (readonly)
The files in this package. This is not the contents of the gem, just the files in the top-level container.
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# File 'lib/rubygems/package.rb', line 94 def files @files end |
#security_policy ⇒ Object
The security policy used for verifying the contents of this package.
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# File 'lib/rubygems/package.rb', line 99 def security_policy @security_policy end |
#spec ⇒ Object
The spec for this gem.
If this is a package for a built gem the spec is loaded from the gem and returned. If this is a package for a gem being built the provided spec is returned.
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# File 'lib/rubygems/package.rb', line 449 def spec verify unless @spec @spec end |
Class Method Details
.build(spec, skip_validation = false) ⇒ Object
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# File 'lib/rubygems/package.rb', line 106 def self.build spec, skip_validation=false gem_file = spec.file_name package = new gem_file package.spec = spec package.build skip_validation gem_file end |
.new(gem) ⇒ Object
Creates a new Gem::Package for the file at gem
.
If gem
is an existing file in the old format a Gem::Package::Old will be returned.
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# File 'lib/rubygems/package.rb', line 122 def self.new gem return super unless Gem::Package == self return super unless File.exist? gem start = File.read gem, 20 return super unless start return super unless start.include? 'MD5SUM =' Gem::Package::Old.new gem end |
Instance Method Details
#add_checksums(tar) ⇒ Object
Adds a checksum for each entry in the gem to checksums.yaml.gz.
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# File 'lib/rubygems/package.rb', line 154 def add_checksums tar Gem.load_yaml checksums_by_algorithm = Hash.new { |h, algorithm| h[algorithm] = {} } @checksums.each do |name, digests| digests.each do |algorithm, digest| checksums_by_algorithm[algorithm][name] = digest.hexdigest end end tar.add_file_signed 'checksums.yaml.gz', 0444, @signer do |io| gzip_to io do |gz_io| YAML.dump checksums_by_algorithm, gz_io end end end |
#add_contents(tar) ⇒ Object
Adds the files listed in the packages’s Gem::Specification to data.tar.gz and adds this file to the tar
.
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# File 'lib/rubygems/package.rb', line 176 def add_contents tar # :nodoc: digests = tar.add_file_signed 'data.tar.gz', 0444, @signer do |io| gzip_to io do |gz_io| Gem::Package::TarWriter.new gz_io do |data_tar| add_files data_tar end end end @checksums['data.tar.gz'] = digests end |
#add_files(tar) ⇒ Object
Adds files included the package’s Gem::Specification to the tar
file
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# File 'lib/rubygems/package.rb', line 191 def add_files tar # :nodoc: @spec.files.each do |file| stat = File.stat file next unless stat.file? tar.add_file_simple file, stat.mode, stat.size do |dst_io| open file, 'rb' do |src_io| dst_io.write src_io.read 16384 until src_io.eof? end end end end |
#add_metadata(tar) ⇒ Object
Adds the package’s Gem::Specification to the tar
file
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# File 'lib/rubygems/package.rb', line 208 def tar # :nodoc: digests = tar.add_file_signed 'metadata.gz', 0444, @signer do |io| gzip_to io do |gz_io| gz_io.write @spec.to_yaml end end @checksums['metadata.gz'] = digests end |
#build(skip_validation = false) ⇒ Object
Builds this package based on the specification set by #spec=
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# File 'lib/rubygems/package.rb', line 221 def build skip_validation = false Gem.load_yaml require 'rubygems/security' @spec.mark_version @spec.validate unless skip_validation setup_signer open @gem, 'wb' do |gem_io| Gem::Package::TarWriter.new gem_io do |gem| gem add_contents gem add_checksums gem end end say "Successfully built RubyGem\nName: \#{@spec.name}\nVersion: \#{@spec.version}\nFile: \#{File.basename @spec.cache_file}\n" ensure @signer = nil end |
#contents ⇒ Object
A list of file names contained in this gem
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# File 'lib/rubygems/package.rb', line 251 def contents return @contents if @contents verify unless @spec @contents = [] open @gem, 'rb' 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 |
#digest(entry) ⇒ Object
Creates a digest of the TarEntry entry
from the digest algorithm set by the security policy.
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# File 'lib/rubygems/package.rb', line 279 def digest entry # :nodoc: algorithms = if @checksums then @checksums.keys else [Gem::Security::DIGEST_NAME] end algorithms.each do |algorithm| digester = OpenSSL::Digest.new algorithm digester << entry.read(16384) until entry.eof? entry.rewind @digests[algorithm][entry.full_name] = digester end @digests end |
#extract_files(destination_dir) ⇒ Object
Extracts the files in this package into destination_dir
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# File 'lib/rubygems/package.rb', line 302 def extract_files destination_dir verify unless @spec FileUtils.mkdir_p destination_dir open @gem, 'rb' 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 return # ignore further entries end end end |
#extract_tar_gz(io, destination_dir) ⇒ Object
Extracts all the files in the gzipped tar archive io
into destination_dir
.
If an entry in the archive contains a relative path above destination_dir
or an absolute path is encountered an exception is raised.
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# File 'lib/rubygems/package.rb', line 328 def extract_tar_gz io, destination_dir # :nodoc: open_tar_gz io do |tar| tar.each do |entry| destination = install_location entry.full_name, destination_dir FileUtils.rm_rf destination FileUtils.mkdir_p File.dirname destination open destination, 'wb', entry.header.mode do |out| out.write entry.read end say destination if Gem.configuration.really_verbose end end end |
#gzip_to(io) ⇒ Object
Gzips content written to gz_io
to io
. – Also sets the gzip modification time to the package build time to ease testing.
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# File 'lib/rubygems/package.rb', line 352 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 |
#install_location(filename, destination_dir) ⇒ Object
Returns the full path for installing filename
.
If filename
is not inside destination_dir
an exception is raised.
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# File 'lib/rubygems/package.rb', line 366 def install_location filename, destination_dir # :nodoc: raise Gem::Package::PathError.new(filename, destination_dir) if filename.start_with? '/' destination_dir = File.realpath destination_dir if File.respond_to? :realpath destination = File.join destination_dir, filename destination = File. destination raise Gem::Package::PathError.new(destination, destination_dir) unless destination.start_with? destination_dir destination.untaint destination end |
#load_spec(entry) ⇒ Object
Loads a Gem::Specification from the TarEntry entry
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# File 'lib/rubygems/package.rb', line 386 def load_spec entry # :nodoc: case entry.full_name when 'metadata' then @spec = Gem::Specification.from_yaml entry.read when 'metadata.gz' then args = [entry] args << { :external_encoding => Encoding::UTF_8 } if Object.const_defined?(:Encoding) && Zlib::GzipReader.method(:wrap).arity != 1 Zlib::GzipReader.wrap(*args) do |gzio| @spec = Gem::Specification.from_yaml gzio.read end end end |
#open_tar_gz(io) ⇒ Object
Opens io
as a gzipped tar archive
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# File 'lib/rubygems/package.rb', line 405 def open_tar_gz io # :nodoc: Zlib::GzipReader.wrap io do |gzio| tar = Gem::Package::TarReader.new gzio yield tar end end |
#read_checksums(gem) ⇒ Object
Reads and loads checksums.yaml.gz from the tar file gem
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# File 'lib/rubygems/package.rb', line 416 def read_checksums gem Gem.load_yaml @checksums = gem.seek 'checksums.yaml.gz' do |entry| Zlib::GzipReader.wrap entry do |gz_io| YAML.load gz_io.read end end end |
#setup_signer ⇒ Object
Prepares the gem for signing and checksum generation. If a signing certificate and key are not present only checksum generation is set up.
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# File 'lib/rubygems/package.rb', line 430 def setup_signer if @spec.signing_key then @signer = Gem::Security::Signer.new @spec.signing_key, @spec.cert_chain @spec.signing_key = nil @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_s } else @signer = Gem::Security::Signer.new nil, nil @spec.cert_chain = @signer.cert_chain.map { |cert| cert.to_pem } if @signer.cert_chain end end |
#verify ⇒ Object
Verifies that this gem:
-
Contains a valid gem specification
-
Contains a contents archive
-
The contents archive is not corrupt
After verification the gem specification from the gem is available from #spec
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# File 'lib/rubygems/package.rb', line 465 def verify @files = [] @spec = nil open @gem, 'rb' 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. rescue Gem::Package::TarInvalidError => e raise Gem::Package::FormatError.new e., @gem end |
#verify_checksums(digests, checksums) ⇒ Object
Verifies the checksums
against the digests
. This check is not cryptographically secure. Missing checksums are ignored.
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# File 'lib/rubygems/package.rb', line 497 def verify_checksums digests, checksums # :nodoc: return unless checksums checksums.sort.each do |algorithm, gem_digests| gem_digests.sort.each do |file_name, gem_hexdigest| computed_digest = digests[algorithm][file_name] unless computed_digest.hexdigest == gem_hexdigest then raise Gem::Package::FormatError.new \ "#{algorithm} checksum mismatch for #{file_name}", @gem end end end end |
#verify_files(gem) ⇒ Object
Verifies the files of the gem
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# File 'lib/rubygems/package.rb', line 515 def verify_files gem gem.each do |entry| file_name = entry.full_name @files << file_name case file_name when /\.sig$/ then @signatures[$`] = entry.read if @security_policy next else digest entry end case file_name when /^metadata(.gz)?$/ then load_spec entry when 'data.tar.gz' then verify_gz entry end 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 end |
#verify_gz(entry) ⇒ Object
Verifies that entry
is a valid gzipped file.
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# File 'lib/rubygems/package.rb', line 549 def verify_gz entry # :nodoc: Zlib::GzipReader.wrap entry do |gzio| gzio.read 16384 until gzio.eof? # gzip checksum verification end rescue Zlib::GzipFile::Error => e raise Gem::Package::FormatError.new(e., entry.full_name) end |