What is the proper way to skip a with_items tasks if the with_items variable is undefined ?
I’ll try to explain my use case:
I have some variable defined via the group_vars
And I want to do loop over this variable only if it is defined.
Before ansible 2 it worked without problem
with a playbook like
`
The correct way is to just drop the when statement and rely on the |default filter:
tasks:
when statements are evaluated for every iteration of the loop, not before the loop. So they are evaluated after ansible attempts to start looping.
The other thing you could do is define an empty value in a role default,
if you're in a role. (There doesn't seem to be a way to do that if you're
not in a role, i.e. to define a playbook default that can be overridden by
group or host variables, at least not that I see in the precedence list at
https://docs.ansible.com/ansible/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable .)
-Josh (jbs@care.com)
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