definir des variables à la volée

fox.yml

---
- hosts: localhost

  tasks:
    - name: definissons une variable
      command: echo Fox
      register: mimi

    - name: premiere variable
      debug: msg="premiere variable {{ mimi.stdout }}"
      when: mimi

    - name: definissons une autre variable
      command: echo MaSk
      register: rara

    - name: seconde variable
      debug: msg="seconde variable {{ rara.stdout }}"
      when: rara

    - name: Tout le monde ensemble
      command: echo {{ mimi.stdout }}{{ rara.stdout }}
      when: mimi and rara
      register: mimirara

    - name: Tout le monde ensemble autrement
      command: echo {{ mimirara.stdout }}
      when: mimirara

    - name: la totale
      debug: msg="la totale en 2 bouts {{ mimi.stdout }}{{ rara.stdout }}"
      when: mimi and rara

    - name: la totale
      debug: msg="la totale {{ mimirara.stdout }}"
      when: mimirara

GATHERING FACTS *************************************************************** 
ok: [localhost]

TASK: [definissons une variable] ********************************************** 
changed: [localhost]

TASK: [premiere variable] ***************************************************** 
ok: [localhost] => {
    "msg": "premiere variable Fox"
}

TASK: [definissons une autre variable] **************************************** 
changed: [localhost]

TASK: [seconde variable] ****************************************************** 
ok: [localhost] => {
    "msg": "seconde variable MaSk"
}

TASK: [Tout le monde ensemble] ************************************************ 
changed: [localhost]

TASK: [Tout le monde ensemble autrement] ************************************** 
changed: [localhost]

TASK: [la totale] ************************************************************* 
ok: [localhost] => {
    "msg": "la totale en 2 bouts FoxMaSk"
}

TASK: [la totale] ************************************************************* 
ok: [localhost] => {
    "msg": "la totale FoxMaSk"
}

PLAY RECAP ******************************************************************** 
localhost                  : ok=9    changed=4    unreachable=0    failed=0