Greetings,
In one of my playbooks, I prompt for a value that, if specified as a
string, will later be used in another play. However, I can't seem to find a
consistent way to evaluate the truthiness/falsiness of the var. Here's a
sample playbook:
---
- name: Test playbook.
hosts: localhost
gather_facts: False
vars_prompt:
- name: "test_var"
prompt: "set a test var string"
private: no
default: ""
tasks:
# prints when test_var == ""
# doesn't print when test_var == "a string"
- debug: msg="I work as expected"
when: not test_var
# Doesn't run as expected per
http://docs.ansible.com/playbooks_variables.html
- debug: msg="I will never run"
when: test_var | bool
- debug: msg="I will never run either"
when: "{{ test_var | bool }}"
# I will fail if you don't enter a string
- debug: msg="test_var is Truthy (no bool)"
when: test_var
I think I understand the last task is failing because I'm not explicitly
testing "test_var". However, I don't understand why the two bool tests
consistently get skipped. My understanding is that the Jinja "when" syntax
should pretty much follow Python logic, yes? e.g.:
>>> bool("")
False
>>> bool("a string")
True
Is there something I'm missing with regard to testing the
truthiness/falsiness of a string? This is Ansible 1.8.2.
Many thanks,
-Aaron
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