PowerShell: Update Azure DevOps Release Variables

AzdUpdateRealeseVars.ps1

# Retrieve the current release
$releaseUrl = ('{0}{1}/_apis/release/releases/{2}?api-version=5.0' -f $($env:SYSTEM_TEAMFOUNDATIONSERVERURI), $($env:SYSTEM_TEAMPROJECTID), $($env:RELEASE_RELEASEID)  )
$release = Invoke-RestMethod -Uri $releaseUrl -Headers @{
    Authorization = "Bearer $env:SYSTEM_ACCESSTOKEN"
}

# Set the relevant variables on the release
$release.variables."My.Test.Vari".value = "just a test"
$release.variables | Add-Member NoteProperty "My.Other.Test" ([PSCustomObject]@{value='test AGAIN'})
$release.variables | Add-Member NoteProperty "Agent.BakFileToRestoreFrom" ([PSCustomObject]@{value='$(Agent.Output.DatabaseBakFileLocation)'})

# Update the release to persist the changes made.
$json = @($release) | ConvertTo-Json -Depth 99
Invoke-RestMethod -Uri $releaseUrl -Method Put -Body $json -ContentType "application/json" -Headers @{
    Authorization = "Bearer $env:SYSTEM_ACCESSTOKEN"
}