class Gem::Package::Old
The format class knows the guts of the ancient .gem file format and provides the capability to read such ancient gems.
Please pretend this doesn’t exist.
Public Class Methods
Source
# File lib/rubygems/package/old.rb, line 22 def initialize(gem, security_policy) require "fileutils" require "zlib" Gem.load_yaml @contents = nil @gem = gem @security_policy = security_policy @spec = nil end
Creates a new old-format package reader for gem
. Old-format packages cannot be written.
Public Instance Methods
Source
# File lib/rubygems/package/old.rb, line 36 def contents verify return @contents if @contents @gem.with_read_io do |io| read_until_dashes io # spec header = file_list io @contents = header.map {|file| file["path"] } end end
A list of file names contained in this gem
Source
# File lib/rubygems/package/old.rb, line 52 def extract_files(destination_dir) verify errstr = "Error reading files from gem" @gem.with_read_io do |io| read_until_dashes io # spec header = file_list io raise Gem::Exception, errstr unless header header.each do |entry| full_name = entry["path"] destination = install_location full_name, destination_dir file_data = String.new read_until_dashes io do |line| file_data << line end file_data = file_data.strip.unpack1("m") file_data = Zlib::Inflate.inflate file_data raise Gem::Package::FormatError, "#{full_name} in #{@gem} is corrupt" if file_data.length != entry["size"].to_i FileUtils.rm_rf destination FileUtils.mkdir_p File.dirname(destination), mode: dir_mode && 0o755 File.open destination, "wb", file_mode(entry["mode"]) do |out| out.write file_data end verbose destination end end rescue Zlib::DataError raise Gem::Exception, errstr end
Extracts the files in this package into destination_dir
Source
# File lib/rubygems/package/old.rb, line 133 def spec verify return @spec if @spec yaml = String.new @gem.with_read_io do |io| skip_ruby io read_until_dashes io do |line| yaml << line end end begin @spec = Gem::Specification.from_yaml yaml rescue Psych::SyntaxError raise Gem::Exception, "Failed to parse gem specification out of gem file" end rescue ArgumentError raise Gem::Exception, "Failed to parse gem specification out of gem file" end
The specification for this gem
Source
# File lib/rubygems/package/old.rb, line 160 def verify return true unless @security_policy raise Gem::Security::Exception, "old format gems do not contain signatures and cannot be verified" if @security_policy.verify_data true end
Raises an exception if a security policy that verifies data is active. Old
format gems cannot be verified as signed.