ANSIBLE: Loop on environment variables - loops

Question

I want to play a shell module in Ansible with multiple environment variable.
I want so to loop on a list registered in my vars. The playbook looks like this :
vars:
tcd_environment_variable:
- { abc_variable: "MSG" , abc_value: "HelloWorld" }
- { abc_variable: "REP_USER" , abc_value: "/home/user" }
tasks:
- name: "Test command with environment variables registered"
shell: "echo $MSG >> $REP_USER/test_env.log"
environment:
"{{ item.abc_variable }}": "{{ item.abc_value }}"
loop: "{{ abc_environment_variable }}"
become: yes
become_user: user
I can't make it work, only this works :
tasks:
- name: "Test command with environment variables registered"
shell: "echo $MSG >> $REP_USER/test_env.log"
environment:
REP_USER: /home/user
MSG: "HelloWorld"
become: yes
become_user: user
But I want to loop on Ansible variable.
Thank's for your help

Answer 1

Use items2dict to transform the list to a dictionary, e.g.
- hosts: localhost
vars:
abc_environment_variable:
- {abc_variable: "MSG", abc_value: "HelloWorld"}
- {abc_variable: "REP_USER", abc_value: "/tmp"}
tasks:
- name: "Test command with environment variables registered"
shell: "echo $MSG >> $REP_USER/test_env.log"
environment: "{{ abc_environment_variable|
items2dict(key_name='abc_variable',
value_name='abc_value') }}"
gives
shell> cat /tmp/test_env.log
HelloWorld
See "Setting the remote environment". Fit the parameters and escalation to your needs.