Ansibleのサンプル。Jnija2には内包表記がない。リストを「引用符でくくって、コンマでつなぐ」例。win_shellとかでよく使う。

join2.yml

- name: jinja2 has not list comprehension.
  hosts: localhost
  become: no
  gather_facts: false
  vars:
    data: [foo, bar, baz]
  tasks:
  -
    debug:
      msg: >
        {% for x in data %}"{{x}}"{% if loop.last %}{% else %},{% endif %}{% endfor %}

TASK [join example 2] ********************************************************************************
ok: [localhost] =>
  msg: |-
    "foo","bar","baz"