Add .NET Core 3 to Cake.Tool update to .NET Core 3 SDK

[devlead]

• Add netcoreapp3.0 moniker to Cake.Tool
• Execute unit tests under netcoreapp3.0
• Update SDK to .NET Core 3

[myloveCc]

Please update nuget package to .NET Core 3.0, Thanks!

[devlead]

Please update nuget package to .NET Core 3.0, Thanks!
We've got an open PR ( #2604 ) which is under going final review.

Meanwhile you can use the .NET Core 2.1 tool in a pure 3.0 SDK environment by setting the environment key DOTNET_ROLL_FORWARD_ON_NO_CANDIDATE_FX to 2, 2 indicates you opting in to allow rolling forward to next major release.

[RehanSaeed]

I'm having trouble running dotnet cake CLI commands on Azure Pipelines. I'm manually installing. NET Core 3.0 but getting this error when I run 'dotnet cake':

It was not possible to find any compatible framework version
The specified framework 'Microsoft.NETCore.App', version '2.1.0' was not found.

• The following frameworks were found:
  3.0.0 at [/opt/hostedtoolcache/dotnet/shared/Microsoft.NETCore.App]
  You can resolve the problem by installing the specified framework and/or SDK.

What I don't understand is that AppVeyor still works. Do I need to wait for this upgrade to be released or is something else going on? Links to my repo and Build output.

[devlead]

@RehanSaeed have you set environment variable DOTNET_ROLL_FORWARD_ON_NO_CANDIDATE_FX to 2 to allow major roll forward?
(it works on AppVeyor because they've got 2.0, 2.1 and 2.2 installed already on agent)

[RehanSaeed]

No. Azure Pipelines already has older versions of. NET Core installed on their hosted build machines, so in theory I shouldn't need to right? I guess it wouldn't hurt to try.

[devlead]

Could be that the UseDotNet@2task installs in a non standard folder and sets path to that, because I've needed to install all SDKs I want to support something like this (if 2.0 and 2.1 needed i.e.)

steps:
- task: UseDotNet@2
  displayName: 'Use .Net Core sdk 2.1.202'
  inputs:
    version: 2.1.202

- task: UseDotNet@2
  displayName: 'Use .Net Core sdk 2.1.701'
  inputs:
    version: 2.1.701

- task: UseDotNet@2
  displayName: 'Use .Net Core sdk 3.0.100'
  inputs:
    version: 3.0.100

Setting DOTNET_ROLL_FORWARD_ON_NO_CANDIDATE_FX to 2 would allow you to have a pure 3.0 env though until Cake.Tool is released with netcoreapp3.0 moniker.

[RehanSaeed]

According to the docs:

$(Agent.ToolsDirectory): This makes the version to be cached on the agent since this directory is not cleanup up across pipelines. All pipelines running on the agent, would have access to the versions installed previously using the agent.

It says previous versions should still work.

[RehanSaeed]

Adding DOTNET_ROLL_FORWARD_ON_NO_CANDIDATE_FX: 2 worked by the way. Long live Cake Build!

[RehanSaeed]

@patriksvensson What is the ETA for a release of Cake.Tool? Does it get release separetely from the rest of cake?

[gep13]

@RehanSaeed it gets released at the same time as Cake, not separately.

It is on the Azure Artifacts feed though:

https://dev.azure.com/cake-build/Cake/_packaging?_a=package&feed=cake%40Local&package=Cake.Tool&protocolType=NuGet&version=0.35.0-alpha0031