Versioning Azure Devops Pipline with Powershell

Hello, I would like to add a pre-script to our Azure pipeline, where versioning is death with: Creating a variable that can be used in the Azure pipeline. Today we use a variable directly into the pipeline: 9.3.$(Rev:r).$(Date:ddMMyyyy) And as of today we are not yet interested in converting to YAML. So a power shell first step is requested: For the versioning: 9.3 - Major fixed, does not change auto. .20 Minor this is the tricky one. The version increases if: - 2 deliverers are made on the same day - A new month has started. And the third part of the versioning : date So for example today it would be: 9.3.20.15072020 Tomorrow: 9.3.20.16072020 If tomorrow two publications would be made 9.3.20.16072020 9.3.21.16072020 And at the start of each new month the revision also increases so: 9.3.20.31072020 9.3.21.01082020