misc/scripts/detect_cycle.py
author Rémi Cardona <remi.cardona@logilab.fr>
Mon, 22 Jun 2015 12:23:50 +0200
changeset 10403 fe614ec1688c
parent 6198 f8dea560703f
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[server/test] fix broken test The first bad revision is: changeset: 10396:82071f767cb8 user: Sylvain Thénault <sylvain.thenault@logilab.fr> date: Thu Jun 11 17:35:11 2015 +0200 summary: [schemas] cwuri should be read-only This changed the number of RQLExpressions to be more than the number of CWRelations in the test's schema. Related to #5457566.


try:
    rtype, = __args__
except ValueError:
    print 'USAGE: cubicweb-ctl shell <instance> detect_cycle.py -- <relation type>'
    print

graph = {}
for fromeid, toeid in rql('Any X,Y WHERE X %s Y' % rtype):
    graph.setdefault(fromeid, []).append(toeid)

from logilab.common.graph import get_cycles

for cycle in get_cycles(graph):
    print 'cycle', '->'.join(str(n) for n in cycle)