For a custom action I need the location of the installers bootstrapper path.
session["SourceDir"]
gives me:
C:\ProgramData\Package Cache\{67668D1E-88B7-4D10-B1B5-98D42AA088E5}\...
but my setup during my test is located in C:\Temp
which is what I would expect.
You need to pass bootstrapper variable into MSI.
The variables you can pass: http://wixtoolset.org/documentation/manual/v3/bundle/bundle_built_in_variables.html
This seems what you want: WixBundleOriginalSource - gets the source path from where the bundle originally ran.
How can you pass it from the bootstrapper:
<MsiPackage SourceFile='ProductSetup.msi' DisplayInternalUI='yes'>
<MsiProperty Name='CONFIGFILELOCATION' Value='[WixBundleOriginalSource]' />
</MsiPackage>
This will make CONFIGFILELOCATION
property available in your ProductSetup.msi
file, which you then can access.