Hello, group.  I am still a novice with Ansible, so perhaps my approach is 
flawed, so if there is a better way, I am happy to hear about it.  I have a 
situation where I need to accumulate values into an Ansible list variable 
on a role-by-role basis, and then use the contents of that list in another 
role in order to populate a config file template.  So, suppose I have these 
roles:

- roles:
  - service1
  - service2
  - service3
  - make-config-file

And a variable 'services'.  I would like to end up with services having a 
value of [ service1, service2, service3 ] by the time 'make-config-file' is 
executed so that it can write those values out to the config file.

So, the question is, how do I push a value onto the 'services' list in each 
role?  I understand how to get the values from the list into the config 
file, I am just not sure how to accumulate a list in Ansible.

Thanks,
Kevin

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