InstallerType: Wix vs Burn?

[cgutman]

I see that there are both Wix and Burn installer types present in winget, yet I'm unsure what the difference between the two would be. They seem to be handled identically everywhere in the code.

As far as I'm aware, the WiX tools can either output an exe, which would be a Burn-based bundled installer (aka InstallerType: burn), or a regular MSI (aka InstallerType: msi). I'm not sure what value InstallerType: wix has.

I see you have a test for burn installers but not for Wix. On the flip side, your manifest spec references wix but not burn.

Is one meant to be deprecated in favor of the other? Are they aliases?

[denelon]

I had to do some digging, and here is what I found:
https://heiswayi.nrird.com/installer-bootstrapping-with-burn

We use the knowledge of the installer type to pass the appropriate arguments for silent install. They appear to be used as an alias to one another. The WiX toolset includes burn, so I believe "wix" is the best value to use, and I'm not sure why the test is using "burn". @yao-msft might know more.