Can ternary() be used with vars or static strings only?

[nusenu]

Hi,

to avoid copying many tasks I was trying to use the ternary() filter as
seen in
https://groups.google.com/forum/#!msg/ansible-project/4bhkNQvrbhc/Vs3u8QQVCAAJ

goal:
If I'm on debian based systems I'd like the owner to be
_tor-{{ item[0] }}_{{ item.1.orport }}

on other systems it should just be
{{ tor_user }}

this is one example of a currently working tasks which I would like to
condense into one by using the ternary() filter:


- name: Ensure directory exists and is owned by tor_user
file: path={{ tor_DataDir }}/{{ item[0] }}_{{ item.1.orport }}
state=directory
owner={{ tor_user }}
with_nested:
- "{{ tor_ips }}"
- "{{ tor_ports }}"
when: ansible_pkg_mgr != 'apt'


- name: Ensure directory exists and is owned by tor_user
file: path={{ tor_DataDir }}/{{ item[0] }}_{{ item.1.orport }}
state=directory
owner=_tor-{{ item[0] }}_{{ item.1.orport }}
with_nested:
- "{{ tor_ips }}"
- "{{ tor_ports }}"
when: ansible_pkg_mgr == 'apt'

==========================================

attempt to use ternary:

- name: Ensure Tor "keys" directory exists and is owned by tor_user
file: path={{ tor_DataDir }}/{{ item[0] }}_{{ item.1.orport }}/keys
state=directory
owner="{{ (ansible_pkg_mgr != 'apt')| ternary('{{ tor_user }}',
'_tor-{{ item[0] }}_{{ item.1.orport }}') }}"
with_nested:
- "{{ tor_ips }}"
- "{{ tor_ports }}"


Fails with:

msg: chown failed: failed to look up user _tor-{# item[0] #}_{#
item.1.orport #}

so it tries to use it as a literal string.

Is what I'm trying to achieve possible or should I simply stick with the
duplicate tasks?

thanks!

[Matt Martz]

You cannot nest {{ }}. You can think of anything inside of {{ }} as a code block, so you just use bare variable names.

I think this should work:

owner="{{ (ansible_pkg_mgr != 'apt')| ternary(tor_user,
'_tor-' ~ item[0] ~ '_' ~ item.1.orport) }}"

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Matt Martz
@sivel
sivel.net

[nusenu]

Matt Martz:

> (ansible_pkg_mgr != 'apt')| ternary(tor_user,
> '_tor-' ~ item[0] ~ '_' ~ item.1.orport)

thanks, works!