[wix-users] Always do major upgrades

[Wolfgang Haupt]

Thx for your fast answer.
Would it be an option to always harvest my files with heat in a
create_setup.bat and generate new GUID's for every component?
Reading the MSI-Log it seems, the windows installer takes the GUID of my
component to lookup if it's already installed, or does it take the keypath
into account and I really have to change the filedate or version, to get
this right.
Basically this setup is a migration of a very old InstallShield-Setup that
uses "always overwrite" utterly often.


Skildum, Mat <Mathew.Skildum at aspect.com> schrieb am Mi., 7. Dez. 2016 um
15:56 Uhr:

> MSI does not truly support this type of functionality without some hacks
> to the MSI.  Basically you have create a pseudo "always overwrite"
> situation by setting false version numbers on the version components.  I do
> this with a post build step where I call a small VBScript that updates the
> file version in the Files table to 99.99.99 or some other high value you
> will never reach for a version.  You can do this for all files if you want
> a global over write, or just for the versioned files if they are all you
> are worried about.
>
> If this has been done, you should be able to upgrade or downgrade if no
> issue as long as your upgrade table id handled correctly.
>
> Mat Skildum
>
>
>
> -----Original Message-----
> From: wix-users [mailto:wix-users-bounces at lists.wixtoolset.org] On Behalf
> Of Wolfgang Haupt
> Sent: Wednesday, December 7, 2016 8:22 AM
> To: wix-users at lists.wixtoolset.org
> Subject: [wix-users] Always do major upgrades
>
> Hello,
>
> I think I stumbled across following problem:
>
>
> http://stackoverflow.com/questions/15138731/wix-major-upgrade-not-installing-all-files
>
>
> https://blogs.msdn.microsoft.com/astebner/2015/11/16/why-windows-installer-removes-files-during-a-major-upgrade-if-they-go-backwards-in-version-numbers/
>
>
> http://stackoverflow.com/questions/4227456/windows-installer-deletes-versioned-file-during-product-upgrade-instead-of-down?rq=1
>
>
> I basically want to be able to up and downgrade my application from
> whatever versions.
> It's no problem for me that it cannot track files and save some
> installation time, I just want to remove the existing installation and then
> install the "new" (or older) version.
>
> When I read the docs it seems to me if I can use the MajorUpgrade-Tag with
> "AllowDowngrades=yes", but still the installer is checking the version of
> my Components after CostInitialize and keeps saying:
> MSI (s) (9C:34) [15:02:05:904]: Disallowing installation of component:
> {GUID} since the same component with higher versioned keyfile exists
>
> After that it removes my current version and does not install the
> mentioned components anymore.
> This keeps puzzling me since days.
>
> Does anyone have an answer/opinion on this topic?
>
>
> Best Regards,
> Wolfgang
>
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