Move octopus deploy variables between sets

move-octopus-variables.ps1

# setup octoposh first 
# http://octoposh.net/

$varset = Get-OctopusVariableSet -LibrarySetName "variable set 1" -ResourceOnly
$varset2 = Get-OctopusVariableSet -LibrarySetName "variable set 2" -ResourceOnly
$vars = $varset.Variables | ?{$_.name.StartsWith("AchievementRate")}
foreach ($var in $vars) {$varset2.Variables.Add($var)}
Update-OctopusResource -Resource $varset2

# it's important to use resource only or you'll get an error about fixed collection size
# this doesn't work for secret variables