regex expression in jinja2 - regex

Question

I have a jinja2 script with a for loop, I just want to see if there is any way I can use regex checks in an if statement.
So the script looks like:
{% for key, value in notes.items() -%}
if {{ value }} starts with http or https
then ~*^/{{ key }}(\?.*)?$ {{ value }};
otherwise
~*^/{{ key }}(\?.*)?$ /{{ value }};
{% endfor %}
Is that somewhow writable???

Answer 1

For example,
- hosts: localhost
gather_facts: false
vars:
_dict:
k1: v1
k2: https://example.com
k3: http://example.com
tasks:
- debug:
msg: |
{% for key, value in _dict.items() -%}
{% if value is regex('^(http|https).*$') %}
~*^/{{ key }}(\?.*)?$ {{ value }};
{% else %}
~*^/{{ key }}(\?.*)?$ /{{ value }};
{% endif %}
{% endfor %}
gives
msg: |-
~*^/k1(\?.*)?$ /v1;
~*^/k2(\?.*)?$ https://example.com;
~*^/k3(\?.*)?$ http://example.com;
Notes
Q: "No test named 'regex' found."
See Testing strings. The test match gives the same result
- debug:
msg: |
{% for key, value in _dict.items() -%}
{% if value is match('(http|https)') %}
~*^/{{ key }}(\?.*)?$ {{ value }};
{% else %}
~*^/{{ key }}(\?.*)?$ /{{ value }};
{% endif %}
{% endfor %}
Q: "The same result with 'match' and 'search'."
A: Test the first 4 characters of the value
{% if value[:4] == 'http' %}