misc/scripts/detect_cycle.py
author Julien Cristau <julien.cristau@logilab.fr>
Mon, 06 Jul 2015 14:34:41 +0200
changeset 10549 5fc21bf2684f
parent 6198 f8dea560703f
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[hooks] base64-encode extid before inserting it into moved_entities If we insert the wrong value we're never going to find these entities again... Closes #5741105.


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)