Re: dynamis class creation

[Vilius Puidokas]

what about using cfengine's logic for classes, like:
 RH72 = ( "/bin/grep 7.2 /etc/redhat-release" )
 amd = ( "/bin/grep amd /etc/whatever-amd-file" )
 RH = ( RH1 RH62 RH72 )

 RH::
   do whats common for all RH boxes
 RH.!amd-very-specific::
   except amd-very-specific boxes which conflict with RH standarts and
shouldnt be really called RH :)

 RH.amd-mod::
   do whats common for all amd stuff
 RH.amd-very-specific::
   do something very special

v

On Mon, 15 Jul 2002, Bob Van Cleef wrote:

> 
> On 15 Jul 2002, Jacob Lee wrote:
> 
> > On my systems, redhat_7 and redhat_7_1 (or redhat_7_0, etc.) are both
> > defined as hard classes. Check for that. If it does turn out that you
> > need to define a class based on the output of a shell script,
> > investigate the cfengine module capabilities:
> 
> Sigh... I guess I need to upgrade to 2.x IFF it will report OS level
> on the 6.x systems.  What I have now works, except for this one function,
> which does appear to exist in 2.x either.  I hate upgrading working 
> systems. /sigh.
> 
> > http://www.cfengine.org/modules/
> 
> That seems to be a rather complex way to achieve a simple option.
> 
> I am actually surprised that there appears to be no way to do this.
> 
> I have a couple of other things where being able to define a class
> on the fly would have dramatically cut the number of lines in the
> cfengine configuration script.
> 
> Bob
>  
> > On Mon, 2002-07-15 at 14:02, Bob Van Cleef wrote:
> > > 
> > > This has got to be an FAQ, but I can't find it anywhere.
> > > 
> > > I want to define a custom class based on the level of OS.  So,
> > > I wrote a simple little script that checks /etc/redhat-release
> > > and returns rh60 for red hat 6.0 and rh6.2 for red hat 6.2 
> > > systems, etc.  Now, the question is, "How to use that script to
> > > define a corresponding class?
> > > 
> > > It appears that can create a separate line for each class:
> > >   rh60 = ( "script that returns non-null only on 6.0 system" )
> > >         rh62 = ( "script that returns non-null only on 6.2 system" )
> > > which seems counter intuitive.
> > > 
> > > but there does not appear to be a method for having a script
> > > that returns the name of the class that you want to define.
> > > 
> > >   define = ( "script returns name of class that is defined )
> > > 
> > > There are enough differences between various versions of Red Hat that
> > > this has become critical.  (Three different "amd" configuration files
> > > for one example.)  The standard classes include the kernel level, but
> > > not the OS distribution level.
> > 
> > 
> 
>