jinja2 conditional help

[Dimitri Yioulos]

Good day, all.

I've created a simple package update playbook, which also creates a report of updated packages:

- hosts: mytesthosts
  gather_facts: false
  become: yes

  tasks:
    - name: install all updates
      yum:
        name: '*'
        update_cache: yes
        state: latest
    - name: List updated packages
      shell: rpm -qa --last | grep "$(date +%a\ %d\ %b\ %Y)" |cut -f 1 -d " "|sort -n
      register: result
      tags:
        - lsupdates
    - debug:
        msg: "{{ result.stdout_lines }}"
      tags:
        - prupdates

    - local_action:
        module: copy
        content: |
          {% set t1 = now().strftime("%m/%d/%Y") %}
          {% for host in ansible_play_hosts %}
          {{ host }}:

          The following packages were updated on {{ t1 }}

          {{ hostvars[host]['result']['stdout'] }}

          {% endfor -%}
        dest: "/home/dyioulos/updates.txt"
      run_once: yes
      tags:
        - report

This does almost exactly what I want it to. The report looks like this:

test1:

The following packages were updated on 11/27/2023

alternatives-1.24-1.el9.x86_64
apr-util-1.6.1-23.el9.x86_64
apr-util-bdb-1.6.1-23.el9.x86_64
~

test2:

The following packages were updated on 11/27/2023

Note that there were no updates applied to test2. I'd like that to be reflected in the report, so that after "The following packages ...", it says "None". I would guess this requires if-then language in the inline jinja2. My searche for, and attempts at, a solution have been unsuccessful.

Your help, as always, would be appreciated.

[Will McDonald]

I haven't tested this but does something like:

          {{ hostvars[host]['result']['stdout']|default("None", true) }}

Give the output you need?

cf:

- https://support.sendwithus.com/jinja/default/

- https://jinja.palletsprojects.com/en/3.1.x/templates/#jinja-filters.default

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[Dimitri Yioulos]

Will, worked perfectly - thanks!