Thomas,
I'm not sure if there is an easier way, but as you (presumably) know the GUID of your application, you could try the following. I haven't tried it myself, but I think it should work:
Add a search to your script to check the registry for HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\<your app guid>\UninstallString
If you find a value here, you can run a Custom Action (type 50) to excecute the uininstall for the existing installation. You will need to set the the Sequence on the action really low so it happens before the rest of the install.
HTH,
Bill
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From "Thomas Schroedter" <[EMAIL PROTECTED]>@lists.sourceforge.net Sent by: [EMAIL PROTECTED] 04/05/2006 03:28 |
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Hi,
I need a bit of help with the msi task. I've no problem to create a setup, it's working fine. Now, I've got a problem with updating the installation. What I want to do is install V1.0.0, create a new V1.0.1 and when the user runs the setup for V1.0.1 on a machine, which already got V1.0.0 installed, uninstall the old version and then install the new one. How can I do it inside the NAnt <msi> task?
Thanks,
Thomas
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