Add support to prettify xml with netconf_config before making diff

[33Fraise33]

SUMMARY

We have a vendor where the xml is minified to a 1 line xml. If we run netconf_config with --diff we are getting the full configuration before and after as the config is only one line and there is a change on that line.
It would come in handy to pass an option to the module to prettify the xml before taking the diff. This way we can actually have meaningful use of --diff --check

ISSUE TYPE

• Feature Idea

COMPONENT NAME

ansible.netcommon.netconf_config

ADDITIONAL INFORMATION

see summary

- name: Nc-cli change netconf server config
  ansible.netcommon.netconf_config:
    content: "{{ lookup('template', 'config_swind_vrf_netconf_server.xml.j2') }}"

[33Fraise33]

I was able to implement a workaround with an include_role that has this content, even though it is not perfect:

- name: 6WIND - {{ swind_play_name }}
  ansible.netcommon.netconf_config:
    content: "{{ swind_template_content }}"
  no_log: true  # needed to prevent diff output from module, do nut use diff: false as it will not register output
  register: swind_netconf_output
- name: 6WIND - Set diff facts
  ansible.builtin.set_fact:
    netconf_before: "{{ swind_netconf_output.diff.before | ansible.utils.from_xml }}"
    netconf_after: "{{ swind_netconf_output.diff.after | ansible.utils.from_xml }}"
  when: swind_netconf_output.diff is defined
- name: 6WIND - Show diff
  ansible.utils.fact_diff:
    before: "{{ netconf_before | ansible.utils.to_paths }}"
    after: "{{ netconf_after | ansible.utils.to_paths }}"
  when: swind_netconf_output.diff is defined

This results in:

--- before
+++ after
@@ -465,7 +465,7 @@
     "data.config.vrf[2].interface.physical[0].ipv6.enabled": "false",
     "data.config.vrf[2].interface.physical[0].name": "ens2f0",
     "data.config.vrf[2].interface.physical[0].port": "pci-b0s6",
-    "data.config.vrf[2].interface.physical[1].description": "SW02",
+    "data.config.vrf[2].interface.physical[1].description": "SW02-CHANGED",
     "data.config.vrf[2].interface.physical[1].enabled": "true",
     "data.config.vrf[2].interface.physical[1].ipv4.enabled": "false",
     "data.config.vrf[2].interface.physical[1].ipv6.enabled": "false",