Different nginx configs based on branch/host/tags

[tkgalk]

My case looks like this: in site.yml I run the role as:

- role: jdauphant.nginx
  become: yes
  tags: [provision]

In ansible/group_vars/nginx.yml I have all the configuration for nginx sites. What I wish to do (and can't really wrap my head around) is to have slightly different nginx configuration on one of my hosts to make no-www -> www redirection on production and the other way on develop and staging.

The way I run the script is by a shell script with tags: ./deploy production, etc.

Is it possible to load different sets of variables based on a tag? Something like:

- role: jdauphant.nginx
  become: yes
  tags: [provision, production]

- role: jdauphant.nginx
  become: yes
  tags: [provision, develop, staging]   

With some sort of way to point to the correct set of variables?

[jdauphant]

You can use different inventory to manage staging and production.
My way to do that can be seen here: https://gist.github.com/jdauphant/10023858

People tend to differentiate with inventories or groups, I don't think it's a good way to use tags but you may have a specific reason to do that.