[tox] Use generating environments Drop the "env" option, which is unknown, and set a generative_ "envlist". Then use conditional dependencies based on factors_ to avoid repeating environment sections. The only singular one is the "cubicweb" environment because of its "commands". At some point, it'd be nice to find a way to have python version prefixes (py27-hooks or py34-web) for environment names but I could not find a way to extract the package name from such names. .. _generative: http://tox.readthedocs.org/en/latest/config.html#generative-envlist .. _factors: http://tox.readthedocs.org/en/latest/config.html#factors-and-factor-conditional-settings

from yams.buildobjs import ComputedRelation, EntityType, RelationDefinition
from cubicweb.schema import RRQLExpression

class Subject(EntityType):
    pass

class Object(EntityType):
    pass

class relation(RelationDefinition):
    subject = 'Subject'
    object = 'Object'

class computed(ComputedRelation):
    rule = 'S relation O'
    __permissions__ = {'read': (RRQLExpression('S is ET'),)}