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Pipeline Performance Optimization

https://github.com/microsoft/coe-alm-accelerator-templates/tree/jeschro-1540

Branch includes performance optimizations by leveraging the Cache DevOps task.

Caching of Install-PowerShell-Modules.yml

The Install-PowerShell-Modules.yml template downloads and installs PowerShell modules required in subsequent pipeline templates. This branch include changes to the install-powershell-module.yml that implements the same logic as PP_BT Tools Installer to save PS Modules to a AA4PP specific folder on the agent. By caching this folder the downloaded PS modules can be restored directly from cache rather than have to download them. The Install-PowerShell-Module.yml has also been modified to download the Microsoft.Xrm.Tooling.ConfigurationMigration which is used by the import-configuration-migration-data.yml.

Cache task for install-powershell-modules.yml

- task: Cache@2
  displayName: Cache Powershell Modules
  inputs:
    key:  restoremodules | "$(powerPlatformToolsSubPath)" | $(Pipeline.Workspace)/PipelineUtils/Pipelines/Templates/install-powershell-modules.yml
    path: $(powerPlatformToolsPath)
    cacheHitVar: powerPlatformToolsPath_IsCached
  • $(powerPlatformToolsSubPath) see Introducing set-tools-paths.yml
  • $(Pipeline.Workspace)/PipelineUtils/Pipelines/Templates/install-powershell-modules.yml - this is reference to the template file. The cache task will calculate a dynamic cache key based on the hash of the template file
  • $(powerPlatformToolsPath) see Introducting set-tools-paths.yml

Invalidating the install-powershell-module.yml cache

To invalidate the cache for install-powershell-modules.yml users can update the content of the install-powershell-modules.yml file. I.e. if the required version for a powershell module is updated in the template the cache will be invalid and all the ps modules will be downloaded.

Introducing set-tools-paths.yml

This new template file will set Pipeline Variables to be used in the cache tasks and the install-powershell-modules.yml template

Following pipeline vars are set

  • powerPlatformToolsSubPath: _coe\ALM_ACC
  • powerPlatformToolsPath: will map depending on pipeline agent (usually maps to the pipeline workspace)
    • Example: C:\agent_work\1$powerPlatformToolsSubPath