Supplied by platform design

[nkolev92]

WIP: Not ready to be reviewed by anyone beyond an immediate group.

Prototype in https://github.com/NuGet/NuGet.Client/tree/dev-nkolev92-suppliedByPlatform
Related: NuGet/NuGet.Client#5919

To get dummy values from prototype, set AddDummyPrunedPackageReferences to true.

[dsplaisted]

It doesn't look like the spec explicitly states whether pruned packages will be downloaded at all. It would be good to explicitly never download pruned packages. Some vulnerability scanners look at the global packages folder, so this would ensure that those scanners wouldn't have false positives for pruned packages.

[nkolev92]

It doesn't look like the spec explicitly states whether pruned packages will be downloaded at all. It would be good to explicitly never download pruned packages. Some vulnerability scanners look at the global packages folder, so this would ensure that those scanners wouldn't have false positives for pruned packages.

Apparently I only had that in the summary.

This helps avoid downloading unnecessary reference and implementation packages

I'll add that explicitly in the rest of the spec as well.

[nkolev92]

Pushed some more changes to the spec based on the feedback.
There is a limitation with transitive shared frameworks. Not sure if we have an automatic solution for that.