templates/windows/installer: Implement /Portable installer flag for CLI users

[Xaymar]

Explain the Pull Request

Implements a /Portable flag which will properly switch the Installer into Portable mode as expected when run from CLI.

Completion Checklist

• I have added myself to the Copyright and License headers and files.
• I will maintain this code in the future and have added myself to CODEOWNERS.
• I have tested this change on the following platforms:
  • MacOS 10.15
  • MacOS 11
  • MacOS 12
  • Ubuntu 20.04
  • Ubuntu 22.04
  • Windows 10
  • Windows 11

[Xaymar]

@ImportTaste Test builds are available in the Checks tab, if you wish to test the new installer.

[Xaymar]

Tested in combination with previous PR.

[God-damnit-all]

It works! One minor nitpick, not something I'm sure can even be avoided without a major rework - the /CURRENTUSER flag is still required to do a CLI install. Looking at the code, I presume /ALLUSERS would work the same way.

But, I don't really care about that, it's not a big deal. I'm mainly mentioning it in case anyone else has issues. (And another thing for them to know is that, while it does create an uninstaller executable, it does not create any install information in "Add or remove programs", i.e. the registry, as intended. It's just there to delete the files specific to StreamFX.)

For reference, this is the command I ran:

streamfx-windows-blahblahblah.exe /VERYSILENT /CURRENTUSER /DIR="DriveLetter:\DirectoryThatDoesntNeedToAlreadyExist" /Portable

Anyhow, thank you for doing this.

[Xaymar]

Yes, you'll still need to specify that you wish to install as the current user. This is a restriction of InnoSetup, and not something I can affect without writing a completely new installer. For obvious reasons, I'm not interested in writing a new installer.

[God-damnit-all]

Yes, you'll still need to specify that you wish to install as the current user. This is a restriction of InnoSetup, and not something I can affect without writing a completely new installer. For obvious reasons, I'm not interested in writing a new installer.

I figured as much. Thanks again for adding the /Portable parameter.