[libvirt] [BUG, RFC] Python generator: missing error_codes in generated libvirError exceptions

Hello, I just encountered a situation, where a KVM instance was reported as "no state" in virsh. This broke some code of mine, which was using "lookupByUUID()" to lookup several VMs. The Python code did raise a libvirt.libvirtError('virDomainLookupByUUID() failed',), where all get_error_*() functions return None. This is because the generated libvirt.py wrapper just raises libvirtError('%s() failed'), which makes deteting the exact fault harder. My current code explicitly checks for get_error_code() == VIR_ERR_NO_DOMAIN. On further investigation I also noticed that qemudDomainLookupByUUID() uses qemuReportError() to reports the error condition, which doesn't associate that error condition with the connection. What's the most appropriate way to fix this: 1. Assume lookupBy*() only will ever report an invalid lookup key and catch all libvirtErrors? 2. Parse the exception string? 3. Extend the generator to add additional information from annotations? 4. Replace the generated code with hand-extended code. Any ideas? Thanks for your input. Sincerely Philipp -- Philipp Hahn Open Source Software Engineer hahn(a)univention.de Univention GmbH Linux for Your Business fon: +49 421 22 232- 0 Mary-Somerville-Str.1 D-28359 Bremen fax: +49 421 22 232-99 http://www.univention.de/