Add support for partial clones

[sliekens]

Hello,

I would like to use treeless clones or blobless clones in my GitHub Actions workflow, but Source Link does not support it.

More info https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/

My workflow

steps:
  - name: Checkout
    uses: actions/checkout@v4
    with:
      fetch-depth: 0 # (no history limit)
      filter: tree:0

  - name: Build
    run: dotnet build

My build fails due to Source Link not supporting this configuration.

/github/home/.nuget/packages/microsoft.build.tasks.git/1.1.1/build/Microsoft.Build.Tasks.Git.targets(25,5): error : Error reading git repository information: Unsupported repository version 1. Only versions up to 0 are supported. [/__w/gw2sdk/gw2sdk/GW2SDK/GW2SDK.csproj::TargetFramework=netstandard2.0]
/github/home/.nuget/packages/microsoft.build.tasks.git/1.1.1/build/Microsoft.Build.Tasks.Git.targets(25,5): warning : Unable to locate repository with working directory that contains directory '/__w/gw2sdk/gw2sdk/GW2SDK'. [/__w/gw2sdk/gw2sdk/GW2SDK/GW2SDK.csproj::TargetFramework=netstandard2.0]

[slang25]

This might be resolved now in the version which now ships with the .NET 8 SDK (in rc2 at the moment)

sourcelink/src/Microsoft.Build.Tasks.Git/GitDataReader/GitRepository.cs

Line 16 in ef95e28

private const int SupportedGitRepoFormatVersion = 1;

I've yet to test it

[slang25]

Ok, just testing it and it works 🚀 (treeless cloned a repo from fresh, built, checked sourcelink data)
So this time next month I can switch everything to .NET 8 and use treeless clones 🎉

[sliekens]

@slang25 how do you test it? I can only see v1.1.1 on NuGet which is from 2021?

[slang25]

In .NET 8 they are shipping sourcelink as part of the SDK, see here:
https://devblogs.microsoft.com/dotnet/announcing-dotnet-8-preview-5/#sdk-source-link-is-part-of-the-net-sdk
So I think that's the last package version that will exist on NuGet, it will just be baked in from .NET 8 onward.
To test it I installed the .NET 8 rc2 SDK, and it was able to read the treeless clone info (with the new repo format version) with no issue.

[sliekens]

Okay I suspect I need to uninstall the package, because I tested on net8.0 RC2 and still got the error from the v1.1.1 package. I feel I should raise a separate issue for that somewhere, because that's not very clear.

[slang25]

Yeah, you will need to remove the package. If you remove it does it work for you?

[sliekens]

Yes! Works now that I removed the package reference!