PortValhalla/scripts/Windows/OS/Setup.ps1

#!/bin/pwsh
$Global:InformationPreference = "Continue";
$Global:ErrorActionPreference = "Inquire";
$null = $env:WIN_COMPUTER_NAME;
$null = $env:SETUP_SCRIPT_NAME;

[xml]$unattendedConfig = [xml]::new();
$unattendedConfig.PreserveWhitespace = $true;

$readerSettings = [System.Xml.XmlReaderSettings]::new();
$readerSettings.IgnoreComments = $true;
$reader = [System.Xml.XmlReader]::Create("$PSScriptRoot/../Resources/Autounattend.template.xml", $readerSettings);

$unattendedConfig.Load($reader);
$namespace = New-Object -TypeName "Xml.XmlNamespaceManager" -ArgumentList $unattendedConfig.NameTable;
$namespace.AddNamespace("ua", $unattendedConfig.DocumentElement.NamespaceURI);

function Get-PassSettings {
    [OutputType([xml])]
    param(
        [string] $passName
    )

    return $unattendedConfig.SelectSingleNode("/ua:unattend/ua:settings[@pass='$passName']", $namespace);
}

# Adjust unattended settings
$specializeSettings = Get-PassSettings "specialize";
$specializeSettings.SelectSingleNode("./ua:component[@name='Microsoft-Windows-Shell-Setup']/ua:ComputerName", $namespace).InnerText = "$env:WIN_COMPUTER_NAME";

# Execute corresponding installer script after startup
$oobeSystemSettings = Get-PassSettings "oobeSystem";
$installationCommand = $oobeSystemSettings.SelectSingleNode("./ua:component/ua:FirstLogonCommands/ua:SynchronousCommand[last()]", $namespace);
$newCommand = $installationCommand.ParentNode.AppendChild($installationCommand.CloneNode($true));

function Get-RemoteScriptPath($path) {
    $relativePath = [System.IO.Path]::GetRelativePath("$PSScriptRoot/../../..", $path);
    Join-Path $env:REMOTE_PROJECT_PATH $relativePath;
}

function Get-Injection($value) {
    "([System.Text.Encoding]::Default.GetString([System.Convert]::FromBase64String('$(
        [System.Convert]::ToBase64String([System.Text.Encoding]::Default.GetBytes($value))
    )')))"
}

function Get-ScriptPathInjection($path) {
    "(Join-Path `$env:SystemDrive $(Get-Injection (Get-RemoteScriptPath $path)))"
}

$newCommand.SelectSingleNode("./ua:CommandLine", $namespace).InnerText = `
    "powershell -Command " + `
    "`$env:INSTALLER_SCRIPT = $(Get-ScriptPathInjection $env:SETUP_SCRIPT_NAME);" + `
    "Invoke-Expression $(Get-ScriptPathInjection "$PSScriptRoot/InitialBoot.ps1");";

$orderElement = $newCommand.SelectSingleNode("./ua:Order", $namespace);
$orderElement.InnerText = ([int]($orderElement.InnerText) + 1);
$newCommand.SelectSingleNode("./ua:Description", $namespace).InnerText = "Install PowerShell Core and git and run setup script";

if (Get-Command Initialize-SetupConfig -ErrorAction SilentlyContinue) {
    Initialize-SetupConfig $unattendedConfig $namespace;
}

$unattendedConfigFile = "X:\unattend.xml";
$unattendedConfig.PreserveWhitespace = $true;
$unattendedConfig.Save($unattendedConfigFile);

Write-Warning "Attention: This program will completely wipe your current disk #1 and install Windows on it. Are you sure you want to do this?"
Read-Host -Prompt "Hit enter to continue or CTRL+C to abort"
& "$SETUP_DRIVE\setup.exe" /Unattend:$unattendedConfigFile;