How to extend BiosUpdateTemplate package script

Entry point of Install.ps1 is the function Main. There you can see a call of function UpdateBios with manufacturer, model, and BIOS version of the current system as arguments. Within that function other manufacturer can be added as a case for the switch.

switch($systemManufacturer.ToUpper())
    {
        "DELL INC."
        {
            $exitCode = UpdateDellBios $systemModel $biosVersion;
        }
    }

Here you can extend with another manufacturer. You also need a dedicated update function for the new manufacturer. Here we use a new UpdateLenovoBios function.

switch($systemManufacturer.ToUpper())
    {
        "DELL INC."
        {
           $exitCode = UpdateDellBios $systemModel $biosVersion;
        }
        "LENOVO"
        {
           $exitCode = UpdateLenovoBios $systemModel $biosVersion;
        }
    }

Check of exit codes must be extended or modified according to documentation of manufacturer's BIOS update or flash utility.

Our new UpdateLenovoBios function could look like the existing UpdateDellBios function and have models of the manufacturer listed and call a method to update a device with that model. Here UpdateLenovo20BW function, which we call with the BIOS version of current system.

switch($systemModel.ToUpper())
    {
        "20BW"
        {
           $exitCode = UpdateLenovo20BW $biosVersion;
        }
    }

Once we have the UpdateLenovoBios function we create also a new UpdateLenovo20BW function where we cover all required BIOS versions of available clients. And create a function which will flash device with new BIOS executable.

switch($biosVersion.ToUpper())
    {
        "JBET67WW"
        {
           $exitCode = UpdateLenovo20BWToJBET67WW;
        }
        default
        {
           $exitCode = UpdateLenovo20BWToJBET67WW;
        }
    }

In such a function UpdateLenovo20BWToJBET67WW we need a flash function for out new manufacturer which will look like existing FlashDellDevice function. New FlashLenovoDevice function would use the BIOS flash utility from website of this manufacturer with required parameters or execute BIOS update executable directly which can run on WinPE.

$exitCode = FlashLenovoDevice "WINUPTP64.exe";