Set-LicenseEnvironmentVariable.ps1

param(
    [Parameter(Mandatory = $true)]
    [ValidateScript( { Test-Path $_ -PathType "Leaf" })]
    [string]$Path
    ,
    [Parameter(Mandatory = $false)]
    [switch]$PersistForCurrentUser
)

$licenseFileBytes = [System.IO.File]::ReadAllBytes($Path)
$licenseString = $null

try
{
    $memory = [System.IO.MemoryStream]::new()

    # gzip license file content
    $gzip = [System.IO.Compression.GZipStream]::new($memory, [System.IO.Compression.CompressionLevel]::Optimal, $true)
    $gzip.Write($licenseFileBytes, 0, $licenseFileBytes.Length);
    $gzip.Close()

    # base64 encode the gzipped content
    $licenseString = [System.Convert]::ToBase64String($memory.ToArray())
}
finally
{
    # cleanup
    if ($null -ne $gzip)
    {
        $gzip.Dispose()
        $gzip = $null
    }

    if ($null -ne $memory)
    {
        $memory.Dispose()
        $memory = $null
    }

    $licenseFileBytes = $null
}

# sanity check
if ($licenseString.Length -le 100)
{
    throw "Unknown error, the gzipped and base64 encoded string '$licenseString' is too short."
}

# persist in current session
$env:SITECORE_LICENSE = $licenseString

if ($PersistForCurrentUser)
{
    # persist on machine for future sessions
    [Environment]::SetEnvironmentVariable("SITECORE_LICENSE", $licenseString, "Machine")
}