feat(windows): cover server 2012 r2 with the win7 offline installer

.github/scripts/assert-server2012-installer-smoke.ps1

@@ -0,0 +1,75 @@
+[CmdletBinding()]
+param(
+  [Parameter(Mandatory = $true)]
+  [string]$InstallerPath,
+  [int]$StartupSeconds = 20
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$os = [System.Environment]::OSVersion.Version
+if ($os.Major -ne 6 -or ($os.Minor -ne 1 -and $os.Minor -ne 3)) {
+  throw "The installer smoke test requires Windows 7 or Server 2012 R2 (kernel 6.1/6.3), detected $($os.ToString())."
+}
+
+$installerPath = (Resolve-Path -LiteralPath $InstallerPath).Path
+$testRoot = Join-Path ([System.IO.Path]::GetTempPath()) "dbx-server2012-installer-smoke"
+$resolvedTemp = (Resolve-Path -LiteralPath ([System.IO.Path]::GetTempPath())).Path.TrimEnd('\')
+$resolvedTestRoot = [System.IO.Path]::GetFullPath($testRoot).TrimEnd('\')
+if (!$resolvedTestRoot.StartsWith("$resolvedTemp\", [System.StringComparison]::OrdinalIgnoreCase)) {
+  throw "Refusing to use a smoke-test directory outside the system temporary directory: $resolvedTestRoot"
+}
+
+if (Test-Path -LiteralPath $resolvedTestRoot) {
+  Remove-Item -LiteralPath $resolvedTestRoot -Recurse -Force
+}
+
+$appProcess = $null
+try {
+  $installer = Start-Process -FilePath $installerPath -ArgumentList @("/S", "/D=$resolvedTestRoot") -Wait -PassThru
+  if ($installer.ExitCode -ne 0) {
+    throw "Server 2012 R2 test installer failed with exit code $($installer.ExitCode)."
+  }
+
+  $appPath = Join-Path $resolvedTestRoot "dbx.exe"
+  $runtimePath = Join-Path $resolvedTestRoot "webview2-fixed-runtime\msedgewebview2.exe"
+  foreach ($requiredPath in @($appPath, $runtimePath)) {
+    if (!(Test-Path -LiteralPath $requiredPath -PathType Leaf)) {
+      throw "Server 2012 R2 installer omitted required file: $requiredPath"
+    }
+  }
+
+  $env:WEBVIEW2_BROWSER_EXECUTABLE_FOLDER = Join-Path $resolvedTestRoot "webview2-fixed-runtime"
+  $env:WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS = "--no-sandbox --disable-gpu"
+  $env:DBX_STARTUP_LOG_DIR = Join-Path $resolvedTestRoot "smoke-logs"
+  New-Item -ItemType Directory -Path $env:DBX_STARTUP_LOG_DIR -Force | Out-Null
+
+  $appProcess = Start-Process -FilePath $appPath -PassThru
+  Start-Sleep -Seconds $StartupSeconds
+  $appProcess.Refresh()
+  if ($appProcess.HasExited) {
+    $startupLog = Join-Path $env:DBX_STARTUP_LOG_DIR "startup.log"
+    $logText = if (Test-Path -LiteralPath $startupLog) {
+      Get-Content -LiteralPath $startupLog -Raw
+    } else {
+      "<startup.log was not created>"
+    }
+    throw "DBX exited during the Server 2012 R2 startup smoke test with code $($appProcess.ExitCode).`n$logText"
+  }
+
+  Write-Host "Server 2012 R2 installer smoke test passed after $StartupSeconds seconds: $installerPath"
+}
+finally {
+  if ($null -ne $appProcess -and !$appProcess.HasExited) {
+    Stop-Process -Id $appProcess.Id -Force -ErrorAction SilentlyContinue
+  }
+
+  $uninstallerPath = Join-Path $resolvedTestRoot "uninstall.exe"
+  if (Test-Path -LiteralPath $uninstallerPath -PathType Leaf) {
+    $uninstaller = Start-Process -FilePath $uninstallerPath -ArgumentList @("/S", "_?=$resolvedTestRoot") -Wait -PassThru
+    if ($uninstaller.ExitCode -ne 0) {
+      Write-Warning "Server 2012 R2 test uninstaller returned exit code $($uninstaller.ExitCode)."
+    }
+  }
+}