def alien
errors = {}
Gem::SourceIndex.from_installed_gems.each do |gem_name, gem_spec|
errors[gem_name] ||= []
gem_path = File.join(Gem.dir, "cache", gem_spec.full_name) + ".gem"
spec_path = File.join(Gem.dir, "specifications", gem_spec.full_name) + ".gemspec"
gem_directory = File.join(Gem.dir, "gems", gem_spec.full_name)
installed_files = find_files_for_gem(gem_directory)
if(!File.exist?(spec_path)) then
errors[gem_name] << ErrorData.new(spec_path, "Spec file doesn't exist for installed gem")
end
begin
verify_gem_file(gem_path)
open gem_path, Gem.binary_mode do |file|
format = Gem::Format.from_file_by_path(gem_path)
format.file_entries.each do |entry, data|
installed_files.delete remove_leading_dot_dir(entry['path'])
next unless data
open File.join(gem_directory, entry['path']), Gem.binary_mode do |f|
unless Gem::MD5.hexdigest(f.read).to_s ==
Gem::MD5.hexdigest(data).to_s then
errors[gem_name] << ErrorData.new(entry['path'], "installed file doesn't match original from gem")
end
end
end
end
rescue VerificationError => e
errors[gem_name] << ErrorData.new(gem_path, e.message)
end
installed_files.delete_if {|potential_directory|
File.directory?(File.join(gem_directory, potential_directory))
}
if(installed_files.size > 0) then
errors[gem_name] << ErrorData.new(gem_path, "Unmanaged files in gem: #{installed_files.inspect}")
end
end
errors
end