what s the use of % set with ansible

[gomz arvind]

Hi team,

can i know the actual usage of % set with ansible

[Abhijeet Kasurde]

Could you please provide more context, examples, error logs, or use case? The amount of information you provided is too little to answer anything.

On Wed, Jul 6, 2022 at 2:39 PM gomz arvind <gomska...@gmail.com> wrote:

Hi team,

can i know the actual usage of % set with ansible

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Thanks,

Abhijeet Kasurde

[gomz arvind]

---
 - name: Cisco NXOS
   hosts: all
   connection: network_cli
   gather_facts: false

   vars:

     - cmdlist: sh clock
     - ansible_python_interpreter: /usr/bin/python3
     - ansible_network_os: nxos
     - project:

   tasks:

     - name: Execute command
       nxos_command:
        commands: "{{ cmdlist }}"
       register: output

     - set_fact:
         arr: "{{ output.stdout_lines[0][1].split() }}"

     - debug:
          msg: "{{ arr[0] }}"

     - name: print variable
       set_fact:
         my_string_var: "{{ arr[0].split(':') | default('') }}"

     - debug:
       #  msg: "{{my_string_var.pop(2)}}"
         msg: |
              {% set project = my_string_var.pop(2) %}
plz find the above example

[Abhijeet Kasurde]

I am assuming you want to split a string and set the value of that to a variable, then no need to use jinja templates

```

---
- hosts: localhost
  gather_facts: no
  vars:
    name: "ab:hi:je:ee"
  tasks:
    - name: Print variable
      set_fact:
         my_var: "{{ (name.split(':') | default(''))[2] }}"

    - debug:

         msg: "{{ my_var }}"

```

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/0e9d4455-17f9-494e-96ae-b8344b18681an%40googlegroups.com.

--

Thanks,

Abhijeet Kasurde

[Brian Coca]

To further explain, {% set var =value %} will only have an effect
within that template, that does not create/update ansible variables.
So while it does 'work' , you should really only use it inside a full
jinja2 template.


--
----------
Brian Coca

[gomz arvind]

@abhijeet and @brian ..thanks for ur responses

@abhijeet- I was trying to remove a nth element from the array..so I have tried with popup

@brian : this is my understanding from ur tips..correct me if I am wrong

 {% set var =value %}

should we consider var is used only once if we use %.?

 if  we use {{ set var = value }} jinja syntax, we can use it through the playbook. 

can u plz give me examples for both ?

[Abhijeet Kasurde]

You can remove nth element like - like in following case I am removing 2nd element

    - name: Print variable
      set_fact:

        my_new_list: |
            {% set result = name.split(':') %}
            {% set _ = result.pop(2) %}
            {{ result }}

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Thanks,

Abhijeet Kasurde

[Abhijeet Kasurde]

Another easy solution - but you need to know value to drop before hand

    - name: Print variable
      set_fact:

        new_name: "{{ name.split(':') | reject('search', 'hi') }}"
      vars:
        name: "ab:hi:je:et"

--

Thanks,

Abhijeet Kasurde