Ultimate way to escape braces? (strange corner case inside)

[Andrew Pashkin]

With Ansible 1.9.2 and this playbook:

---
- name: test
  hosts: localhost
  connection: local
  tasks:
    - name: register variable
      shell: >
        echo {% raw %} '{{ .Suddenly.Go.Template.String }}' {% endraw %}
      register: var
    - debug:
        var: var

After invoking like it: ansible-playbook test.yml
You will get this:

fatal: [localhost] => Failed to template {{var}}: Failed to template echo '{{ .Suddenly.Go.Template.String }}': template error while templating string: unexpected '.'

I actually barely understand, why it may happen. Seems like Ansible renders var twicely, and in a second pass it cannot parse Go template string. Or I'm doing something wrong?

-- 
With kind regards, Andrew Pashkin.
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[Borys Borysenko]

The .Suddenly.Go.Template.String is not valid Ansible variable name. Take a look on "What Makes A Valid Variable Name" section of Ansible documentation.

it cannot parse Go template string

I suppose it just typo, but to be clear Ansible support only jinja2 template language.

[Andrew Pashkin]

The Go template part is not expected to be parsed by Ansible's template engine at all, and it's enclosed in {% raw %}...{% endraw %} tag because of that.

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[Borys Borysenko]

Hi Andrew, now it's more clear. I did not realize what you want to achieve at first. According to the Jinja docs it should work:

shell: >

        echo {% raw %} {{ '{{.Suddenly.Go.Template.String }}' }} {% endraw %} > /tmp/test