var-naming[no-role-prefix] false positive on cacheable property of ansible.builtin.set_fact

[infracaninophile]

Summary

ansible.builin.set_fact can take a cacheable property to control longer term retention on facts. ansible-lint doesn't
distinguish this from the name of a fact to be created, and this triggers the var-naming[no-role-prefix] violation improperly.

Issue Type

• Bug Report

OS / ENVIRONMENT

ansible-lint --version
ansible-lint 6.16.2 using ansible-core:2.14.3 ruamel-yaml:0.17.26 ruamel-yaml-clib:0.2.7

• ansible installation method: OS package -- FreeBSD ports
• ansible-lint installation method: OS package -- FreeBSD ports

STEPS TO REPRODUCE

Use ansible.builtin.set_fact with cacheable in a role.

Playbook: foo.yaml

---
- name: Illustrate ansible-lint false positive with set_fact and cacheable
  hosts: localhost
  roles:
    - foo_role

Role foo_role/tasks/main.yaml

---

- name: Using set_fact with cacheable
  ansible.builtin.set_fact:
    foo_role_fact: bar
    cacheable: true

Desired Behavior

Possible security bugs should be reported via email to [email protected]

Actual Behavior

Please give some details of what is happening.
Include a minimum complete verifiable example with:

• minimized playbook to reproduce the error
• the output of running ansible-lint including the command line used

% ansible-lint foo.yml
WARNING  Listing 1 violation(s) that are fatal
var-naming[no-role-prefix]: Variables names from within roles should use role_name_ as a prefix. (set_fact: cacheable)
roles/foo_role/tasks/main.yaml:5 Task/Handler: Using set_fact with cacheable

Read documentation for instructions on how to ignore specific rule violations.

                    Rule Violation Summary
 count tag                        profile rule associated tags
     1 var-naming[no-role-prefix] basic   idiom

Failed after min profile: 1 failure(s), 0 warning(s) on 2 files.

• if you're getting a stack trace, also the output of
  ansible-playbook --syntax-check playbook

% ansible-playbook --syntax-check foo.yml

playbook: foo.yml