Réf. : Re: Using variables in classes definition

[paguerlais]

It doesn't work because this syntax defines i_am_a_server as soon as the
command ends with a null status. Which is quite always the case with echo.





help-cfengine-bounces+paguerlais=airfrance.fr@gnu.org@zot.com> le
11/02/2003 04:09:59

Envoyé par :      Chris Edillon <jce@zot.com>


Pour : paguerlais@airfrance.fr
cc :   help-cfengine@gnu.org, patrice.guerlais@libertysurf.fr

Objet :     Re: Using variables in classes definition


On Mon, 10 Feb 2003 paguerlais@airfrance.fr wrote:

> I need to define a variable and a class depending on that variable.
> Something like :
>
> <example>
> control:
>       servers = ( host1 host2 )
>
> classes:
>       i_am_a_server = ( ${servers} )
> </example>
> It doesn't work because :
> - ${servers} must be enclosed in quotes for syntax needs
> - if ${servers} is enclose in quotes, it is considered as a command+
> parameters which must be executed and whose result is used to defined
> i_am_a_server.
>
> I need both the variable and the class because somewhere later in my
script
> I give the variable value as a parameter to an external script
> (shellcommands), and some sections of the script are activated only if
the
> running host belongs to the list "servers".
> Of course I can repeat the hosts list on the "i_am_a_server" class
> definition, but each time I modify "servers" I must then think to modify
> also "i_am_a_server" :-(
>
> I couldn't find something in the docs. Does somebody has any idea ?
>
  the following is weird, but it works:

control:
    servers = ( host1 host2 )

classes:
    i_am_a_server = ( "/bin/echo $(servers)" )



chris



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