Add new line to template for each item in a list

Question

Given the following example list and Jinja template:

List:

list:
    - foo
    - bar

Jinja template:

{% for key in list %}
results:
      - "{{ key }}"
{% endfor %}

I am able to produce the following output:

results:
    - foo
results:
    - bar

How can I instead append a line, for each item in the list, to the template to produce this result?

results:
    - foo
    - bar

Is this possible with Ansible without using something like lineinfile? I am moreorless trying to replicate the Helm range filter which might look like this:

results:
    {{- range .Values.list }}
    - {{ . }}
    {{- end }}

---

The join filter appears to get me a little closer. For example:

results:
    - "{{ list | join('\n- ') }}"

Produces the following. But it is not syntactically correct yet:

results:
    - "foo
- bar"

Answer 1

Given the list

list:
    - foo
    - bar

---

Q: "Produce this result!"

results:
    - foo
    - bar

A: There are more options:

1. You can iterate the list

    - copy:
        dest: /tmp/test.yml
        content: |
          results:
          {% for key in list %}
              - {{ key }}
          {% endfor %}

gives

shell> cat /tmp/test.yml 
results:
    - foo
    - bar

---

You can put the template into a file

shell> cat templates/test.yml.j2
results:
{% for key in list %}
    - {{ key }}
{% endfor %}

Then, the template module gives the same result

    - template:
        dest: /tmp/test.yml
        src: test.yml.j2

---

2. The next option is Ansible formatting filters and Jinja indent filter. The task below gives the same result

    - copy:
        dest: /tmp/test.yml
        content: |
          results:
              {{ list|to_nice_yaml|indent(4) }}

3. You can use tab if you want to

    - copy:
        dest: /tmp/test.yml
        content: |
          results:
          {% for key in list %}
          {{ '{}- {}'.format(tab, key) }}
          {% endfor %}
      vars:
        tab: "{{ '\t' }}"

The tab spacing will depend on the pager

shell> cat /tmp/test.yml 
results:
    - foo
    - bar