Enable unity licensing server for Windows (#638)

* Enable unity licensing server for windows

* Clarify validating logic with explicit variables

dist/platforms/windows/activate.ps1

@@ -50,6 +50,30 @@ if ( ($null -ne ${env:UNITY_SERIAL}) -and ($null -ne ${env:UNITY_EMAIL}) -and ($
       Start-Sleep -Seconds 3
   }
 }
+elseif( ($null -ne ${env:UNITY_LICENSING_SERVER}))
+{
+    #
+    # Custom Unity License Server
+    #
+
+    Write-Output "Adding licensing server config"
+
+    $ACTIVATION_OUTPUT = Start-Process -FilePath "$Env:UNITY_PATH\Editor\Data\Resources\Licensing\Client\Unity.Licensing.Client.exe" `
+                                       -ArgumentList "--acquire-floating" `
+                                       -NoNewWindow `
+                                       -PassThru `
+                                       -Wait `
+                                       -RedirectStandardOutput "license.txt"
+
+    $PARSEDFILE = (Get-Content "license.txt" | Select-String -AllMatches -Pattern '\".*?\"' | ForEach-Object { $_.Matches.Value }) -replace '"'
+
+    $env:FLOATING_LICENSE = $PARSEDFILE[1]
+    $FLOATING_LICENSE_TIMEOUT = $PARSEDFILE[3]
+
+    Write-Output "Acquired floating license: ""$env:FLOATING_LICENSE"" with timeout $FLOATING_LICENSE_TIMEOUT"
+    # Store the exit code from the verify command
+    $ACTIVATION_EXIT_CODE = $ACTIVATION_OUTPUT.ExitCode
+}
 else
 {
     #

dist/platforms/windows/return_license.ps1

@@ -6,7 +6,16 @@ Write-Output "#      Return License     #"
 Write-Output "###########################"
 Write-Output ""
 
-if (($null -ne ${env:UNITY_SERIAL}) -and ($null -ne ${env:UNITY_EMAIL}) -and ($null -ne ${env:UNITY_PASSWORD}))
+if (($null -ne ${env:UNITY_LICENSING_SERVER}))
+{
+  Write-Output "Returning floating license: ""$env:FLOATING_LICENSE"""
+  Start-Process -FilePath "$Env:UNITY_PATH\Editor\Data\Resources\Licensing\Client\Unity.Licensing.Client.exe" `
+                -ArgumentList "--return-floating ""$env:FLOATING_LICENSE"" " `
+                -NoNewWindow `
+                -Wait
+}
+
+elseif (($null -ne ${env:UNITY_SERIAL}) -and ($null -ne ${env:UNITY_EMAIL}) -and ($null -ne ${env:UNITY_PASSWORD}))
 {
   #
   # SERIAL LICENSE MODE