Task is to automate the Azure package generation through TFS build

Hi,

We are doing automation of Azure. Task is to automate the Azure package generation through TFS build.
If any blogs or other materials will be helpful.

FYI.... we have 6 different environments with different configuration files with different inputs. We have created 6 PowerShell scripts to make the necessary changes in respective files.

We want to create six different build definitions for 6 different environments. But in this build definition how can we call our scripts as pre-build event? Every build definition will call different script in order to make environment specific changes.

Is there any way to change the build definition workflow file to incorporate our script execution?

Thanks,
Bhupendra.