Enable direct invocation of PS resource

[SteveL-MSFT]

Summary of the new feature / enhancement

Enable dsc resource get -r <psresource> to invoke get, set, and test to a PS resource

Proposed technical implementation details (optional)

No response

[mgreenegit]

This is parity with invoke-dscresource, correct? In native command, what is the best option for input of property:value pairs? Do we still input a hashtable?

[michaeltlombardi]

@mgreenegit I would expect this to work like dsc resource (get|set|test) -r <command_resource> - you pass a JSON blob over stdin with the property bag.

In a super fancy ideal world that I think is explicitly out of scope for now, it would be very neat if DSC could lookup the resource specified by -r <name> and dynamically provide CLI flags for the properties. But for now, I think JSON over stdin is the sensible option and doesn't require any new engineering.

This would also mean you could do something like:

@{
  Scope = 'Machine'
  Ensure = 'Present'
  UpdateAutomatically = $true
  UpdateFrequency     = 45
} | ConvertTo-Json | dsc resource get -r TSToy.Example/PSTSToy

With is arguably as or more convenient than:

$Params = @{
  Module     = 'TSToy.Example'
  Name       = 'PSTSToy'
  Method     = 'Get'
  Properties = @{
    Scope               = 'Machine'
    Ensure              = 'Present'
    UpdateAutomatically = $true
    UpdateFrequency     = 45
  }
}
Invoke-DscResource @Params

[anmenaga]

This is implemented in #82.