[wpkg-users] [Bug 149] Specify prerequisites for a package

[Falko Trojahn]

bugzilla-daemon at bugzilla.wpkg.org schrieb:
> http://bugzilla.wpkg.org/show_bug.cgi?id=149
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> --- Comment #8 from Rainer Meier <r.meier at wpkg.org>  2009-03-30 23:18:50 ---
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>>> As I said a custom "execute" check can be configured already now. This check
>>> could verify if the application should be applied on the system. If not, it
>>> just returns exit code 0 to tell WPKG that the package is already installed.
>>>       
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>   
>> Just to be clear, here you are referring to an <install> element running a
>> script command and that script checking the prerequisite status, right?
>>     
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> No. Actually here I was referring to a <check type="execute" .../> statement.
> This allows the specified script to be executed and its exit value to be
> evaluated.
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> e.g.
> <check type="execute" condition="exitcodesmallerthan" value="1"
> path="%SOFTWARE%\somescript.cmd" />
>
> This script might return 0 now to indicate to WPKG that it is successfully
> installed so WPKG will not run any install command and assume everything is
> fine.
>   
Just to understand your statements a bit clearer:

So I would use this script to determine e.g. if the disk space
requirements on
a machine are met. The script should return 0 if the disk space is low,
so that
wpkg "thinks" the package is already installed - and has the package in the
local wpkg.xml - and tries to deinstall it when the package is removed
from profile.

Even when it isn't really installed - and the script returns 0 for
"space too low" -
so wpkg tries to uninstall the package on every run, since the "space
too low"
meens for wpkg "package is installed"??

Best regards,
Falko