Append {{item}} to existing line

Archives Ansible Project
1

I need to update the grub.conf, for example, with some custom parameters. The kernel line in the grub.conf will vary on each server; therefore, I just wish to append to the line if it doesn’t already contain the parameter. Can this appending be done with lineinfile or some other module? Any examples?

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Turns out someone already did this. You can do it with a monster regexp, which I wont even to pretend to understand.

I found out someone had exactly what I needed on ansible-galaxy. I downloaded it and call the role. WORKS PERFECTLY!
https://galaxy.ansible.com/jtyr/grub_cmdline/

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I should also note that if going the regexp route you need backrefs enabled (for lineinfile)