regex_search in validation

[mvanholsteijn]

In Issue #398, it is suggested that you can use jinja2 ansible filters to use a regex expression in a validation, but no example is given.

The request in the issue thread was to ask a question here on the forum. So here it is: can you given an example of using a regex in a validation?

[mvanholsteijn]

So, I figured it out. Here is an example:

resource_name:
  type: str
  help: The name of your custom resource?
  validator: >-
    {% if not (resource_name | regex_search('^Custom::[A-Z][a-zA-Z0-9]+$')) %}
    Must be a CloudFormation custom type name, eg Custom::Custom.
    {% endif %}

[yajo]

This seems like a nice improvement for docs, in case you feel like opening the PR. 😀

[mvanholsteijn]

#895