Forum: Cfengine Help
Subject: Re: ex_list and purge conflict?
Author: hartikka
Link to topic: https://cfengine.com/forum/read.php?3,20878,20961#msg-20961
Hi Niel,
Thanks for your time.
I think I have what I want...
Here is the end goal:
1) I want cfengine controlling a directory 'zzz'.
I think I have that.
2) Next, I want cfengine to remove any file in zzz that is not in the
corresponding zzz in the masterfiles.
In general, the user is not allowed to add files to zzz.
I think I use 'purge' for that - and I think I have it working.
3) Finally, I want to allow the file zzz/free to change.
This is an exception - the user is allowed to change this file.
I thought I should I use 'ex_list'() for this sort of thing.
I tried this...
bundle agent maintainMe
{
...
vars:
"setup_excludes" slist => { "\.pv", "\.pt", "\.eq",
"PRES\.cq"};
...
files:
"/home/me/setup/"
copy_from => mycopy("$(masters)/setup","localhost"),
file_select => ex_list("@(setup_excludes)"),
...
}
body copy_from mycopy(from, server)
{
...
purge => "true"; # remove extra files
...
}
It seems to me now that I have to use 'anchored' RE's.
"setup_excludes" slist => { ".*\.pv", ".*\.pt", ".*\.eq",
".*PRES.cq"};
End of end goal.
And it seems to be attained.
Does that make sense?
Regarding my last:
It occurred to me that if I omitted the ex_list() and instead did this:
host> ln -s zzz/free masterfiles/zzz/free
... then I could change zzz/free and cfengine could only give me the changed
one whatever it thought.
This looks kind of loopy. Scary even. I don't like it.
I would like it even less if my masterfiles were on a remote machine - which,
in the end, they will be.
I very much prefer to learn how to properly express my end goal in native
cfengine language.
End of about my last.
I wonder now:
Can ex_list() can be told to exclude files that match in one directory and not
in another directory?
Thank you again.
Best,
Ron
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