Description
in java/packaging.rb:
def from_zip(file)
Zip::ZipFile.open(file.to_s) do |zip|
return Manifest.new unless zip.get_entry('META-INF/MANIFEST.MF')
Manifest.parse zip.read('META-INF/MANIFEST.MF')
end
end
zip.get_entry fails with an exception if the entry doesn't exist, so the whole method fails