Native Jinja2 Types

jinja-native.yaml

# Upstream Jinja2 native types docs: http://jinja.pocoo.org/docs/2.10/nativetypes/
# Upstream Jinja2 native types PR: https://github.com/pallets/jinja/pull/708
# Jinja2 native types in Ansible PR: https://github.com/ansible/ansible/pull/32738
# ansible-devel@ announcement: https://groups.google.com/forum/#!topic/ansible-devel/o42OoC0VZ4A

# Preserving types of castings
- hosts: localhost
  gather_facts: no
  vars:
    adict:
      str_value: "42"
  tasks:
    - debug:
        msg: "{{ adict.str_value|int }}"

# $ ansible-playbook ../ansible-repro/jinja-native.yml
# PLAY [localhost] *************************************************************
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "msg": "42"
# }

# $ ANSIBLE_JINJA2_NATIVE=1 ansible-playbook ../ansible-repro/jinja-native.yml
# PLAY [localhost] ************************************************************
#
# TASK [debug] ****************************************************************
# ok: [localhost] => {
#     "msg": 42
# }

# Preserving return types of filters
- hosts: localhost
  gather_facts: no
  vars:
    x: 2
  tasks:
    - debug:
        msg: "{{ x | pow(2) }}"

# ansible-playbook ../ansible-repro/jinja-native.yml
# PLAY [localhost] *************************************************************
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "msg": "4.0"
# }
#

# ANSIBLE_JINJA2_NATIVE=1 ansible-playbook ../ansible-repro/jinja-native.yml
# PLAY [localhost] *************************************************************
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "msg": 4.0
# }

# Preserving return types of operations
- hosts: localhost
  gather_facts: no
  vars:
    adict:
      str_value: "40"
  tasks:
    - set_fact:
        result: "{{ adict.str_value|int + 2 }}"
    - debug:
        var: result
    - debug:
        msg: "{{ result|type_debug }}"

# $ ansible-playbook jinja-native.yml
# PLAY [localhost] *************************************************************
#
# TASK [set_fact] **************************************************************
# ok: [localhost]
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "result": "42"
# }
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "msg": "unicode"
# }

# $ ANSIBLE_JINJA2_NATIVE=1 ansible-playbook jinja-native.yml
# PLAY [localhost] *************************************************************
#
# TASK [set_fact] **************************************************************
# ok: [localhost]
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "result": 42
# }
#
# TASK [debug] *****************************************************************
# ok: [localhost] => {
#     "msg": "int"
# }

- hosts: localhost
  gather_facts: no
  vars:
    my_var: 1
  tasks:
    - copy:
        dest: /tmp/output
        content: |
          {
              "key1": "{{ my_var }}",
              "key2": "2",
              "key3": "3",
              "key4": "4",
              "key5": "5",
          }

# content of /tmp/output without ANSIBLE_JINJA2_NATIVE set
# {"key3": "3", "key2": "2", "key1": "1", "key5": "5", "key4": "4"}
#
# content of /tmp/output with ANSIBLE_JINJA2_NATIVE set
# {
#     "key1": "1",
#     "key2": "2",
#     "key3": "3",
#     "key4": "4",
#     "key5": "5",
# }
#
# The format is preserved.