Is it possible to use environment variable on configuration files?

[ariellourenco]

Hi there,

I am trying to use WinGet configuration file to create a new Virtual Hard Disk to store my Dev Drive. However, I am struggling to follow the Microsoft recommendation for VHD Dev Drives which recommend use a per-user directory path location to store your Dev Drive to avoid any unintentional sharing.

So far, I got the configuration file below, which works just fine. However, I would like to update the FilePath: property to use the user profile environment variable.

# ymal-language-server: $schema=https://aka.ms/configuration-dsc-schema/0.2
properties:
  configurationVersion: 0.2.0
  assertions:
    - resource: Microsoft.Windows.Developer/OsVersion
      id: OsVersion
      directives:
        description: Minimum OS version requirement
        allowPrerelease: true
      settings:
        MinVersion: "10.0.22621.2338"
  resources:
    - resource: VirtualHardDrive
      directives:
        description: Create a new Virtual Hard Drive
        module: StorageDsc
        allowPrerelease: true
      settings:
        FilePath: 'C:\DevDrives\Zero.vhdx'
        DiskSize: 50Gb
        DiskFormat: 'Vhdx'
        DiskType: 'Dynamic'
        Ensure: 'Present'

Any idea if that is possible? And if so, how to achieve it? So far, I have tried a few variants such as %USERPROFILE% and $env:UserProfile

[denelon]

I've reached out to one of the developers for the DSC Resource. I'm not sure why using the alias for the path isn't working correctly. In DSC v3, we'll have support for parameters and variables in configuration files. We're working on the experimental support for DSC v3 in WinGet currently, but there are very few packages that support DSC v3 right now. Keep an eye out for the experimental support in the next preview release or two. I'll try to add links when it's available (assuming I remember 😊).

[ariellourenco]

Thanks

[Gijsreyn]

There might be a slight similarity in this one from DSC v3 on configuration: PowerShell/DSC#619