[wpkg-users] Use regex to get installed version number?

[Nils Thiele]

Am 2015-02-27 00:33, schrieb Stefan Pendl:
> Am 26.02.2015 um 10:51 schrieb Nils Thiele:
>> Hey,
>> we are currently still deploying java 7.
>> i was looking into java 8 but it seems oracle removed the function to 
>> automaticly remove the installed version and replace it with the new 
>> one like in java 7, instead it will install the update additionally.
>> 
>> The easiest solution is of course to keep the previous versionnumber 
>> in the package and remove it before the installation of the new one.
>> But this wont work if a system doesnt have the last release but maybe 
>> a older one because it hasnt connected to the server that often.
>> 
>> Now i was wondering if it is possible to use regex to fix this problem 
>> inside the package file without having to rely on other problems.
>> 
>> If you use regex command like this
>> Java.8.Update.([0-9]*)
>> the result of regex is the sub version number.
>> 
>> Is it possible to integrate the results of a check into a wpkg 
>> variable?
>> 
>> Something like this:
>> <check type="uninstall" condition="exists" path="Java 8 Update 
>> ([0-9]*)" />
>> <variable name="oldsubversion" value="%regexcheckresult%" />
>> <upgrade cmd='msiexec.exe /qn /x 
>> {26A24AE4-039D-4CA4-87B4-2F832180%oldsubversion%F0}' />
>> 
>> This obviously wont work, just wondering if something like this is 
>> possible at all without having to rely on a "outside" wpkg script.
>> 
>> Thanks!
>> 
>> Best regards,
>> Nils
>> 
> 
> The ability for in place updates is still listed in the documentation,
> but it seems that the installer is broken.
> 
> You can use the code below to remove any previous release of the 32-bit 
> JRE 8.
> 
> Use "FOR /?" in a command prompt for further information about the /L
> switch of the FOR DOS command.
> 
> '---code start (watch for line wraps)
> 
> <remove cmd="%ComSpec% /c for /L %N in (10,1,99) do msiexec /passive
> /x {26A24AE4-039D-4CA4-87B4-2F832180%~NF0}">
>     <exit code="1605" />
> </remove>
> 
> '---code end
> 
> --
> Stefan P.
> 
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Ah thank your very much.
Well this is a great solution.
Have used "for" in python scripting quite a lot but never thought about 
using it here!

This should be added to the wpkg wiki!


Nils

-- 
IT-Support - Fachbereich 09 Kulturgeschichte und Kulturkunde
Universität Hamburg