Pass own endpoint to a project as environment variable

[Kralizek]

I need to set two environment variables for a project to be able to run correctly: one is the address of another service, the other is the address of the same service.

var auth = builder.AddProject<AuthService>("auth")
    .WithReference(db)
    .WithReference(legacyDb);

var admin = builder.AddProject<Admin>("admin")
    .WithEnvironment("AdminUi__AuthorityUrl", auth.GetEndpoint("http"))
    .WithEnvironment("AdminUi__UiUrl", "http://localhost:5278") // Copied from launchSettings.json
    .WithReference(db);

Is there a better way than this? Something that doesn't create a magic string coupling?

Ideally I'd love the possibility to do something like

var admin = builder.AddProject<Admin>("admin")
    .WithEnvironment("AdminUi__AuthorityUrl", auth.GetEndpoint("http"))
    .WithEnvironment("AdminUi__UiUrl", t => t.GetEndpoint("http"))
    .WithReference(db);

[davidfowl]

We might need a new API to make this pleasant. Right now you would need to do something wacky like:

EndpointReference adminHttp = default!;

var admin = builder.AddProject<Admin>("admin")
    .WithEnvironment("AdminUi__AuthorityUrl", auth.GetEndpoint("http"))
    .WithEnvironment(context => context.EnvironmentVariables["AdminUi__UiUrl"] = adminHttp)
    .WithReference(db);

adminHttp = admind.GetEndpoint("http");

[Kralizek]

Thanks for your help. I'd love to have a more pleasant way in the future although I understand it's not a common scenario :D