Support for the Ruby 2.1 series ended on March 31 2017. See here for details.
Validator performs various gem file and gem database validation
Checks the gem directory for the following potential inconsistencies/problems:
Checksum gem itself
For each file in each gem, check consistency of installed versions
Check for files that aren't part of the gem but are in the gems directory
1 cache - 1 spec - 1 directory.
returns a hash of ErrorData objects, keyed on the problem gem's name.
# File rubygems/validator.rb, line 84 def alien(gems=[]) errors = Hash.new { |h,k| h[k] = {} } Gem::Specification.each do |spec| next unless gems.include? spec.name unless gems.empty? next if spec.default_gem? gem_name = spec.file_name gem_path = spec.cache_file spec_path = spec.spec_file gem_directory = spec.full_gem_path unless File.directory? gem_directory then errors[gem_name][spec.full_name] = "Gem registered but doesn't exist at #{gem_directory}" next end unless File.exist? spec_path then errors[gem_name][spec_path] = "Spec file missing for installed gem" end begin verify_gem_file(gem_path) good, gone, unreadable = nil, nil, nil, nil open gem_path, Gem.binary_mode do |file| package = Gem::Package.new gem_path good, gone = package.contents.partition { |file_name| File.exist? File.join(gem_directory, file_name) } gone.sort.each do |path| errors[gem_name][path] = "Missing file" end good, unreadable = good.partition { |file_name| File.readable? File.join(gem_directory, file_name) } unreadable.sort.each do |path| errors[gem_name][path] = "Unreadable file" end good.each do |entry, data| begin next unless data # HACK `gem check -a mkrf` source = File.join gem_directory, entry['path'] open source, Gem.binary_mode do |f| unless f.read == data then errors[gem_name][entry['path']] = "Modified from original" end end end end end installed_files = find_files_for_gem(gem_directory) extras = installed_files - good - unreadable extras.each do |extra| errors[gem_name][extra] = "Extra file" end rescue Gem::VerificationError => e errors[gem_name][gem_path] = e.message end end errors.each do |name, subhash| errors[name] = subhash.map do |path, msg| ErrorData.new path, msg end.sort end errors end
Given a gem file's contents, validates against its own MD5 checksum
Contents of the gem file
# File rubygems/validator.rb, line 25 def verify_gem(gem_data) # TODO remove me? The code here only validate an MD5SUM that was # in some old formatted gems, but hasn't been for a long time. end
Given the path to a gem file, validates against its own MD5 checksum
Path to gem file
# File rubygems/validator.rb, line 35 def verify_gem_file(gem_path) open gem_path, Gem.binary_mode do |file| gem_data = file.read verify_gem gem_data end rescue Errno::ENOENT, Errno::EINVAL raise Gem::VerificationError, "missing gem file #{gem_path}" end