Jinja2 filter list using string contains test

Question

I\'m trying to filter a list in ansible in Jinja2 when the elements contain a string, but the Jinja documentation doesn\'t seem clear enough for me to figure it out.

Thi

Answer 1

You can build a new list with set_fact and print the elements of a new list.

- hosts: localhost
  gather_facts: false
  vars:
    script_stdout_lines:
      - apples
      - running script one
      - oranges
      - running script two
  tasks:
    - set_fact:
        new_list: "{{ new_list | default([]) + [item] }}"
      with_items: "{{ script_stdout_lines }}"
      when: '"running script" in item'
    - debug: var=new_list

Result:

TASK [set_fact] *********************************************************************************************************************
skipping: [localhost] => (item=apples) 
ok: [localhost] => (item=running script one)
skipping: [localhost] => (item=oranges) 
ok: [localhost] => (item=running script two)

TASK [debug] ************************************************************************************************************************
ok: [localhost] => {
    "new_list": [
        "running script one",
        "running script two"
    ]
}

It prints skipping during set_fact operation but at the end it provides a new list with the only matching items.