[wix-users] Burn is Unsetting Variable

[Farrukh Waheed]

Someone one StackOverFlow mentioned that it is actually an Open Bug. See
details here:
https://github.com/wixtoolset/issues/issues/5355

On Thu, 30 Aug 2018 at 22:09, Edwin Castro via wix-users <
wix-users at lists.wixtoolset.org> wrote:

> The registry search is updating the variable with the results of the
> search, the empty string, which indicates the target of the search was not
> found.
>
> You need to change your condition to
>
> WiXBundleInstalled OR (NOT Installed_Ver) OR (WixBundleFileVersion >
> Installed_Ver)
>
> That way, if Installed_Ver is empty, then NOT Installed_Ver will be true.
>
> --
> Edwin G. Castro
>
>
> On Thu, Aug 30, 2018 at 1:31 AM Farrukh Waheed via wix-users <
> wix-users at lists.wixtoolset.org> wrote:
>
> > In my Bundle project, I'm searching registry for a version and setting a
> > variable:
> >
> >     <Variable Name="Installed_Ver" bal:Overridable="yes" Type="version"
> > Value="0.0.0.0" Persisted="yes" />
> >
> >     <util:RegistrySearch
> >       Id="Self_Ver"
> >       Root="HKLM"
> >       Key="Software\MyCompany\MyProductName"
> >       Value="Version"
> >       Variable="Installed_Ver"
> >       Format="raw"
> >       Win64="yes"
> >   />
> >
> > And using this in Condition as:
> >
> >     <util:RegistrySearchRef Id="Self_Ver"  />
> >     <bal:Condition Message="A recent or same version of this product is
> > already installed on this machine. Please contact product support for
> more
> > information." >
> >       <![CDATA[WixBundleInstalled OR (WixBundleFileVersion >
> > Installed_Ver)]]>
> >     </bal:Condition>
> >
> > This works fine if HKLM\Software\MyCompany\MyProductName\\Version exists.
> > But if this registry doesn't exist then registry search would fail and it
> > is  Unsetting the variable 'Installed_Ver'. This causes the condition
> > wrongly evaluating to false.
> >
> > By defining <Variable>, I tried to set a default value i.e. "0.0.0.0" so
> it
> > should have some value and condition would be evaluated properly i.e. to
> > True in this case.
> >
> > Here is the log, which shows that it is Unsetting the variable
> > 'Installed_Ver'.
> >
> > > [5898:2AC4][2018-08-30T13:15:08]i000: Setting string variable
> > 'WixBundleName' to value 'RegVersionCheck'
> > [5898:2AC4][2018-08-30T13:15:08]i000: Setting string variable
> > 'WixBundleManufacturer' to value 'Testing'
> > [5898:3354][2018-08-30T13:15:08]i000: Setting numeric variable
> > 'WixStdBALanguageId' to value 1033
> > [5898:3354][2018-08-30T13:15:08]i000: Setting version variable
> > 'WixBundleFileVersion' to value '7.1.2.3'
> > [5898:2AC4][2018-08-30T13:15:08]i100: Detect begin, 1 packages
> > [5898:2AC4][2018-08-30T13:15:08]i000: Registry key not found. Key =
> > 'Software\MyCompany\MyProductName'
> > [5898:2AC4][2018-08-30T13:15:08]i000: ****Unsetting variable
> > 'Installed_Ver'****
> > [5898:2AC4][2018-08-30T13:15:08]i101: Detected package: MainProduct,
> state:
> > Absent, cached: None
> > [5898:2AC4][2018-08-30T13:15:08]i104: Detected package: MainProduct,
> > feature: CalculatorFeature, state: Absent
> > [5898:2AC4][2018-08-30T13:15:08]i052: Condition 'WixBundleInstalled OR
> > (WixBundleFileVersion > Installed_Ver)' evaluates to false.
> > [5898:2AC4][2018-08-30T13:15:08]e000: A recent or same version of this
> > product is already installed on this machine. Please contact product
> > support for more information.
> > [5898:2AC4][2018-08-30T13:15:08]e000: Error 0x81f40001: Bundle condition
> > evaluated to false: WixBundleInstalled OR (WixBundleFileVersion >
> > Installed_Ver)
> > [5898:2AC4][2018-08-30T13:15:08]i199: Detect complete, result: 0x0
> >
> > I tried by hard-coding "0.0.0.0" in the condition and it works fine.
> >
> > ***How should I get a default value for Installed_Ver if registry search
> > fails?***
> >
> > Thanks
> >
> > ____________________________________________________________________
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> > http://www.firegiant.com/
> >
>
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