def build_graph(self):
"""Generates a DOT representation of the template"""
g = Graph(self)
path = self.filename + '.dot'
try:
g.to_dot(path)
LOGGER.info('DOT representation of the graph written to %s', path)
except ImportError:
LOGGER.error(
'Could not write the graph in DOT format. Please install either `pygraphviz` or `pydot` modules.')
def match(self, cfn):
matches = []
graph = Graph(cfn)
for cycle in graph.get_cycles(cfn):
source, target = cycle[:2]
message = 'Circular Dependencies for resource {0}. Circular dependency with [{1}]'.format(
source, target)
path = ['Resources', source]
matches.append(RuleMatch(path, message))
return matches