help-cfengine
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: editfiles complexity


From: Mark . Burgess
Subject: Re: editfiles complexity
Date: Sun, 25 Jan 2004 21:16:07 +0100 (MET)

Sorry that I have not come back to this. It will take me a while
to start up this discussion. I am in the middle of a few intensive
weeks of visitors and travelling lectures :) Please let me
come back to this in a couple of weeks.


M

On 20 Jan, Systems Administrator wrote:
> On Mon, 19 Jan 2004 address@hidden wrote:
> 
>> The main constraint on editfiles is that operations should be convergent.
>> This means that one should not split the commands into something looking
>> like "perl" or "C" as you suggest in 
>> 
>>  IF [No(t)] <condition> [Parameters] DO <action> [Parameters]
> 
>       Can you give me an example of something non-convergent that the 
> current structure does a good job of preventing?  Or is it a matter of 
> mindset?  (I assume the second for the rest of this e-mail).  What's the 
> difference between all the current editfiles statements containing the 
> word "If", and my suggestion above?  
> 
>> 
>> But perhaps something equivalent can be done. Like renaming the
>> commands hierarchically.
>> 
>>   <condition>.<action>(parameters)
> 
>       Hmm.  That might work.  From what I can see, you're basically 
> allowing the same thing, but trying to get people to think convergently 
> about it.  Would it be more cfenginely if we had:
> 
>       <condition> = ( <actions> )
> 
>       Or maybe if we didn't call it "IF".  
> 
>       WHERE [No(t)] <condition> [Parameters] DO <action> [Parameters]
> 
>       Or maybe we're not thinking convergently about the whole 
> editfiles thing.  
> 
>       Btw, it might be cool to have an "onlyone" option, so that you can 
> say the comment below.  
> -----
> If x matches y, then z should be true, but there should only be one line 
> where x matches y.  
> -----
> 
>       Of course, that's not a syntax suggestion :).  
> 
>       Eagerly await the next installment,
> 
>       :)
> 



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Work: +47 22453272            Email:  address@hidden
Fax : +47 22453205            WWW  :  http://www.iu.hio.no/~mark
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





reply via email to

[Prev in Thread] Current Thread [Next in Thread]