Bill Weiss <bwe...@backstopsolutions.com> writes:
> Sorry if this is a FAQ that I’ve missed. A pointer to TFM would be
> appreciated if so.
>
> I’m looking for a conditional include of sorts. In module X, I’d like to
> frob a file if the httpd package is installed. If it’s not, I want to just
> skip it. Is there a simple way to do this?
Other people pointed you to writing a custom fact. Let me instead tell you
why this isn't the best strategy, and suggest another approach that might work
better in the long run:
Generally speaking, the more decisions you make in your code the harder it is
to understand. For example, module foo might do something or might not based
on module bar being included — in this case, module bar is the HTTPD package
being installed.
A better approach, and one that is simpler, is to specify policy:
Any host that needs a web server has httpd installed and this file
frobbed.
Any host that doesn't need a web server does not have httpd installed.
Then, code that up in your manifests without the decision:
In X, install httpd[1] and frob the file. In Y, don't do either.
Daniel
Footnotes:
[1] Probably best done by include a httpd class rather than directly writing
out the 'package' stanza, so other modules can also add the httpd service.
--
✣ Daniel Pittman ✉ dan...@rimspace.net ☎ +61 401 155 707
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