Update Azure DevOps Server App Tiers with Latest Agents

Get-LatestAgents.ps1

param (
    [string] $Path
)
$RootDir = "C:\ProgramData\Microsoft\Azure DevOps\"
$AgentsCacheDirectory = "$RootDir\Agents"
if ($Path) {
    $AgentsCacheDirectory = $Path
}

$LatestRelease = Invoke-RestMethod -Uri "https://api.github.com/repos/microsoft/azure-pipelines-agent/releases/latest"

Write-Output "Latest Release: $($LatestRelease.name)"

$LatestAssets = Invoke-RestMethod -Uri $LatestRelease.assets[0].browser_download_url

if (!(Test-Path $AgentsCacheDirectory)) 
{
    New-Item -Path $RootDir -ItemType "directory" -Name "Agents"
}

if (Test-Path $AgentsCacheDirectory) 
{
    foreach ($ZippedAssetData in $LatestAssets)
    {
        $LocalZipPath = "$AgentsCacheDirectory\$($ZippedAssetData.name)"
        $AlreadyExists = Test-Path -Path $LocalZipPath
        if ($AlreadyExists) 
        {
            Write-Output "$LocalZipPath ... Already Exists"
        } 
        else 
        {
            Write-Output "Starting download to $LocalZipPath ..."
            Invoke-WebRequest -Uri $ZippedAssetData.downloadUrl -OutFile $LocalZipPath
            Write-Output "Downloaded $LocalZipPath successfully"
        }
    }
}
else
{
    Write-Output "[ERROR] Could find or write to $AgentsCacheDirectory."
}