Headless update for Visual Studio

Update-VisualStudio2017.ps1

Write-Host "Update Visual Studio Installer" -ForegroundColor Cyan

# [Microsoft Developer community](https://developercommunity.visualstudio.com/content/problem/307261/unattend-self-update-of-vs-installer.html)
$vsCommunityDownloadUrl = "https://download.visualstudio.microsoft.com/download/pr/8a973d5d-2ccb-428c-8204-290a15d30e2c/be8c694b12879a8f47f34369d55d453c/vs_community.exe";
$vsSetupDirectory = "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Setup"
$vsCommunitySetupPath = "$vsSetupDirectory\vs_community.exe";
if((Test-Path -Path $vsSetupDirectory) -eq $false){
  $r = md $vsSetupDirectory
}
if((Test-Path -Path $vsCommunitySetupPath) -eq $false){
  Write-Host "Downloading VS Setup from $vsCommunityDownloadUrl..." -ForegroundColor Gray
  (New-Object System.Net.WebClient).DownloadFile($vsCommunityDownloadUrl, $vsCommunitySetupPath);
}
Write-Host "Starting the VS setup to update the VS Installer" -ForegroundColor Gray
$installerUpdateProcess = Start-Process `
  -FilePath $vsCommunitySetupPath `
  -Wait `
  -PassThru `
  -ArgumentList @(
    "--update",
    "--quiet",
    "--wait"
  );

$installerUpdateProcess.WaitForExit();

Write-Host "$([IO.Path]::GetFileName($vsCommunitySetupPath)) exited with code: $($installerUpdateProcess.ExitCode)" -ForegroundColor Gray

Write-Host "Update Visual Studio" -ForegroundColor Cyan
# [Microsoft Docs](https://docs.microsoft.com/en-us/visualstudio/install/use-command-line-parameters-to-install-visual-studio)
$vsUpdateProcess= Start-Process `
  -FilePath "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe" `
  -Wait `
  -PassThru `
  -ArgumentList @(
    "update",
    "--installPath `"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community`"",
    "--norestart",
    "--quiet",
    "--force"
  );

$vsUpdateProcess.WaitForExit();

Write-Host "vs_installer.exe exited with code: $($vsUpdateProcess.ExitCode)" -ForegroundColor Gray