Avoid passing TargetFramework as a global property when packing for projects that aren't multi-targeted

[dsplaisted]

In dotnet/designs#281, we are proposing that the TargetFramework will be included in the output path if it was set as a global property or if the project was multi-targeted. Otherwise, it will not be part of the output path.

This causes an issue when doing a NuGet pack command, as the _WalkEachTargetPerFramework target runs the _GetBuildOutputFilesWithTfm target for each TargetFramework. This means in this inner build the TargetFramework will be a global property, even if there is only one.

To fix this, the NuGet pack logic would need to change so that if there is only one target framework, it does not pass the TargetFramework global property in this case.

Issue is missing Type label, remember to add a Type label

[aortiz-msft]

@dsplaisted - Could you please add us to the discussion for the design referenced above?

[dsplaisted]

@aortiz-msft I think your team has been part of the discussion. This was the topic in two partner sync meetings so far, and I believe @nkolev92 was in and contributed to both.

EDIT: Note that this specific change to NuGet wasn't discussed in those meetings, I discovered the issue afterwards when working on the implementation.

[jeffkl]

Team Triage: Per offline discussion, this change might not be needed. Feel free to re-activate if you feel otherwise.