Ec2api Style Commandments

• Step 1: Read the OpenStack Style Commandments https://github.com/openstack-dev/hacking/blob/master/doc/source/index.rst
• Step 2: Read on

Ec2api Specific Commandments

General

• Do not use locals(). Example:

  LOG.debug("volume %(vol_name)s: creating size %(vol_size)sG" %
            locals()) # BAD
  
  LOG.debug("volume %(vol_name)s: creating size %(vol_size)sG" %
            {'vol_name': vol_name,
             'vol_size': vol_size}) # OKAY
  

• Use ‘raise’ instead of ‘raise e’ to preserve original traceback or exception being reraised:

  except Exception as e:
      ...
      raise e  # BAD
  
  except Exception:
      ...
      raise  # OKAY
  

Creating Unit Tests

For every new feature, unit tests should be created that both test and (implicitly) document the usage of said feature. If submitting a patch for a bug that had no unit test, a new passing unit test should be added. If a submitted bug fix does have a unit test, be sure to add a new one that fails without the patch and passes with the patch.

For more information on creating unit tests and utilizing the testing infrastructure in OpenStack Ec2api, please read ec2api/testing/README.rst.