Use Graphviz to visualize roles dependencies

ansible-roles-dependencies.py

#!/usr/bin/env python3

import sys
import graphviz
from glob import glob
import yaml
import logging

logging.basicConfig(level=logging.DEBUG)

dot = graphviz.Digraph(name='roles')

role_nodes = {}

def add_role(role):
    logging.info("Adding role: %s", role)
    role_id = role.replace('/', '_')
    if role not in role_nodes:
        dot.node(role_id, role)
        role_nodes[role] = role_id

def link_roles(dependent, depended):
    logging.info("Adding dependency: %s -> %s", dependent, depended)
    dot.edge(
        role_nodes[dependent_role],
        role_nodes[depended_role]
    )

for path in glob('roles/*/meta/main.yml'):
    dependent_role = path.split('/')[1]

    add_role(dependent_role)

    with open(path, 'r') as f:
        for dependency in yaml.safe_load(f.read()).get('dependencies', []):
            try:
                if isinstance(dependency, str):
                    depended_role = dependency
                else:
                    depended_role = dependency.get('role')
                if depended_role:
                    add_role(depended_role)
                    link_roles(dependent_role, depended_role)
            except:
                logging.exception("Probleme with %s dependency: %s", dependent_role, dependency)
dot.format = 'png'
dot.render('roles.gv', view=True)

require graphviz package