I thought 

- name: Clone repo
  git: repo="{{ git_repo }}"
       dest="{{ git_dest }}"
       version="{{ git_version | lookup('env','git_version') | 
default('master') }}"
  notify: reload apache

would work to use the git_version group_var, ENV if it was set and master 
otherwise.

I think I was thinking of | as or rather than a filter when I first wrote 
it but still can't figure out how to do what I want, weirdly the error is 
stderr: fatal: '{{git_repo}}' does not appear to be a git repository
so I think the whole Jinja templating fails.

If I do 
 lookup('env','git_version') | default('master')
It gets '' if the env var is not set, rather then taking the default as I 
hoped

Thanks, 
Tom

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