Source Generator: information about referencing project?

Question

I started playing with the C# source generators.

What I want is to kick off a git describe --tags --long process and populate a static GitVersion class with the current tag and hash code as properties.

The problem is, that I have no information about the directory of the referencing project so I cannot know where to run the git process. I cannot find any useful information in the GeneratorExecutionContext argument of the Execute function.

AppDomain.CurrentDomain points to the csc.exe process so I guess there is no way to know it's there?

Answer 1

Currently, you could not get the reference project directory from GeneratorExecutionContext, but you can pass the path information by manually specifying the meta of .csproj, then retrieve the path meta in generating time.

Answer 2

I ended up using:

public void Execute(GeneratorExecutionContext context) {
     var mainSyntaxTree = context.Compilation.SyntaxTrees
                          .First(x => x.HasCompilationUnitRoot);

     var directory = Path.GetDirectoryName(mainSyntaxTree.FilePath);