Conditionally import a playbook based on vars_prompt in Ansible - ansible

Question

I am using the following ansible script to import a playbook based on the user input,
---
- hosts: localhost
vars_prompt:
- name: "cleanup"
prompt: "Do you want to run cleanup? Enter [yes/no]"
private: no
- name: run the cleanup yaml file
import_playbook: cleanup.yml
when: cleanup == "yes"
Execution log:
bash-$ ansible-playbook -i hosts cleanup.yml
Do you want to run cleanup? Enter [yes/no]: no
PLAY [localhost] *********************************************************************************************************************
TASK [Gathering Facts] ***************************************************************************************************************
ok: [127.0.0.1]
PLAY [master] ********************************************************************************************************************
TASK [Gathering Facts] ***************************************************************************************************************
fatal: [192.168.56.128]: FAILED! => {"msg": "The conditional check 'cleanup == \"yes\"' failed. The error was: error while evaluating conditional (cleanup == \"yes\"): 'cleanup' is undefined"}
to retry, use: --limit #/home/admin/playbook/cleanup.retry
PLAY RECAP ***************************************************************************************************************************
127.0.0.1 : ok=1 changed=0 unreachable=0 failed=0
192.168.56.128 : ok=0 changed=0 unreachable=0 failed=1
It throws error in the imported playbook not in the mail playbook.
Please help me to import a playbook based on user input.

Answer 1

vars_prompt variables are only defined in the play in which they were called. In order to use them in other plays, a workaround is to use set_fact to bind the variable to a host, then use hostvars to access that value from the second play.
For instance:
---
- hosts: localhost
vars_prompt:
- name: "cleanup"
prompt: "Do you want to run cleanup? Enter [yes/no]"
private: no
tasks:
- set_fact:
cleanup: "{{cleanup}}"
- debug:
msg: 'cleanup is available in the play using: {{cleanup}}'
- debug:
msg: 'cleanup is also available globally using: {{hostvars["localhost"]["cleanup"]}}'
- name: run the cleanup yaml file
import_playbook: cleanup.yml
when: hostvars["localhost"]["cleanup"] == True