provide a simple version helper script to interact with ES (#929)

Author: mtfriesen

tools/version-helper.ps1

@@ -0,0 +1,22 @@
+# This file returns the version information to internal ES systems.
+
+param (
+    [ValidateSet("Major", "Minor", "Patch")]
+    [Parameter(Mandatory=$true)]
+    [string]$Version = ""
+)
+
+Set-StrictMode -Version 'Latest'
+$ErrorActionPreference = 'Stop'
+
+# Important paths.
+$RootDir = Split-Path $PSScriptRoot -Parent
+. $RootDir\tools\common.ps1
+
+$XdpVersion = Get-XdpBuildVersion
+
+switch ($Version) {
+    "Major" { return $XdpVersion.Major }
+    "Minor" { return $XdpVersion.Minor }
+    "Patch" { return $XdpVersion.Patch }
+}