I think there is a feature request open to allow WiX to updated the
UpgradeCode for each instance transform. It just hasn't been implemented.
Same could be done for the ProductCode but I'd have to investigate to see if
there are reasons why "*" isn't allowed right now.
InstanceTransforms always require me to go back and re-read the
documentation.
On Fri, Sep 2, 2011 at 11:18 AM, Daniel Pratt <colorblind...@gmail.com>wrote:
> I've authored an installation package (with WIX) that uses instance
> transforms to allow multiple installations of the package. Although setting
> up the initial package was pretty easy, I found out too late that there
> seems to be very little guidance on how to *upgrade* existing instances
> when
> a new version comes along.
>
> Previous to dealing with multiple instances, I would've configured the
> installation package to perform a 'major upgrade' and not worried about it
> further. Alas, it seems that major upgrades do not play nice with multiple
> instances. Because all instances share the same upgrade code (so WIX seems
> to enforce), installing a new version of the package results in *all* of
> the
> installed instances get uninstalled (rather than just the one I'm trying to
> upgrade).
>
> What scant advice I could find on the matter led me to doing the following:
> For new instances, I use a command line like this:
>
> msiexec.exe /i "Setup.msi" TRANSFORMS=:INSTANCE.10 MSINEWINSTANCE=1 *...*
>
> When upgrading an instance to a new version, I use a command line like
> this:
>
> msiexec.exe /i "Setup.msi" /n {58cabe0e-f0f7-494c-a9e9-2fe101419b10}
> REINSTALL=ALL REINSTALLMODE=vamus ...
>
> The above seems to work perfectly *most of the time*. Occasionally,
> however,
> certain files do not get updated as expected.
>
> I suspect the cause might be that I am breaking some upgrade rules when
> updating the installation package (that I wouldn't have had to worry about
> when doing a major upgrade). One possible broken rule might be how I'm
> managing the product code. As I have done with other installation packages,
> I set Product Id = "*" so the base product code changes for every new
> version. Of course, each instance transform specifies it's own product
> code,
> which is static (if it's possible to make it dynamic, the WIX docs don't
> say
> as much). Should I be manually changing the product code of each instance
> every time? Or should the base product code be static also? Or ought it not
> matter?
>
> In summary, my question is how should I author the installation package and
> how should I run it in order to upgrade only a single installation instance
> (when there are multiple installed instances)?
>
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