Mark,
Those are great to know about, but I'm not sure they apply to my
problem. The example I gave was a simplification where the actual files
promises are actually interations over an slist variable that contains a
bunch of log files that independently may or may not exist, e.g.
"optional_logs" slist => { "auth", "cron", "daemon", "ftp", "kern",
... };
Then I'd have two files promises:
"/var/adm/$(optional_logs)"
...
"/var/adm/$(optional_logs).info"
...
Does that make it clearer or am I missing a way I might use the new
features you mentioned?
Thanks,
Justin
-----Original Message-----
From: Mark Burgess [mailto:mark.burg...@iu.hio.no]
Sent: Thursday, May 13, 2010 11:23 AM
To: Justin Lloyd
Cc: help-cfengine@cfengine.org
Subject: Re: Optional files?
Justin, what you are looking for is probably a new feature
"ignore_missing_inputs"
and "ignore missing bundles". See the "bleeding edge" reference manual
on the community site.
Justin Lloyd wrote:
> If a system may or may not have a specific file and you only want to
> evaluate the promise if the file exists, this is an example of the
only
> way I can see to do that:
>
> classes:
>
> "file_exists" expression => fileexists("/var/adm/kern.info");
>
> files:
>
> file_exists::
>
> "/var/adm/kern.info"
>
> rename => rotate("5");
>
> I was thinking that it might be nice to have something like an
> "optional" attribute that would ignore the promise if the file doesn't
> exist (maybe defaulting to "false"), simplifying such promises:
>
> files:
>
> "/var/adm/kern.info"
>
> optional => "true",
> rename => rotate("5");
>
> Has anyone else thought about this or know of something that I might
be
> missing? I'm setting up some log rotation (hence this particular
> example) and currently we have a number of such "optional" log files
on
> many systems (but we're working on cleaning that up).
>
> Thanks,
> Justin
>
--
Mark Burgess
-------------------------------------------------
Professor of Network and System Administration
Oslo University College, Norway
Personal Web: http://www.iu.hio.no/~mark
Office Telf : +47 22453272
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