Currently, the way you replace a rule with another rule is by using the
'deprecated_rule' parameter of '(Documented)RuleDefault'. For example:
deprecated_rule = policy.DeprecatedRule(
name='foo:bar',
check_str='role:bazz'
)
policy.RuleDefault(
name='foo:create_bar',
check_str='role:bang',
description='Create a bar.',
deprecated_rule=deprecated_rule,
deprecated_reason='foo:bar has been replaced by foo:create_bar',
deprecated_since='N',
)
In this instance, we're stating that the 'foo:create_bar' policy
replaces the 'foo:bar' policy and we've used (and indeed have to use, to
avoid a 'ValueError') the 'deprecated_reason' and 'deprecated_since'
parameters on the **new** rule to illustrate why. This is confusing. The
new rule clearly isn't the one that's deprecated, so why are we stating
the 'deprecated_reason' and 'deprecated_since' there? We can clarify
this by instead specifying the reason and timeline on the deprecated
rule, like so:
deprecated_rule = policy.DeprecatedRule(
name='foo:bar',
check_str='role:bazz'
deprecated_reason='foo:bar has been replaced by foo:create_bar',
deprecated_since='N',
)
policy.RuleDefault(
name='foo:create_bar',
check_str='role:bang',
description='Create a bar.',
deprecated_rule=deprecated_rule,
)
Add support for this, with appropriate warnings to nudge people over to
the new, improved way of doing things eventually.
Change-Id: Ie4809c7749242bd092a2677b7545ef281735d984
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
16840b6a3f