Run a task only if a variable is defined

[Simón Muñoz]

Hi all,

I'm trying to run a task only if a variable is defined (for example, I have some groups where it's defined and some others where it's not). I got to this (adding when: nginx_sites), that seems to work, but just asking in case there is a better way. 

- name: Enabling nginx sites according to group and host_vars
  file: >
    src=/etc/nginx/sites-available/{{ item }}
    dest=/etc/nginx/sites-enabled/{{ item }}
    state=link
  with_items: random_var
  when: random_var
  notify:
    - reload nginx

Thanks in advance!

[Michael DeHaan]

You can do this:

when: foo is defined

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[rek...@voodoowarez.com]

`when: foo is defined` is what i used to do.

these days though, i've found that more often i want to still be able to signal a falsity.

unless extremely carefully considered, i try to use:

`when: foo|default(False)`

HH, -r

[Simón Muñoz]

Thanks a lot guys ;)!