Logging From Builtin Function

[abdullahalrifat]

I have created a custom built in function following this adding-built-in, and create a OPA runtime. Now I want to log any error happening in the built in function written in go to come as log inside OPA container.
can anyone help me how to do that?

[charlieegan3]

Hi Abdullah, might the BuiltinContext PrintHook be suitable for your needs?

	rego.RegisterBuiltin2(
		&rego.Function{
			Name:    "github.repo",
			Decl:    types.NewFunction(types.Args(types.S, types.S), types.A),
			Memoize: true,
		},
		func(bctx rego.BuiltinContext, a, b *ast.Term) (*ast.Term, error) {
			err := bctx.PrintHook.Print(print.Context{}, "github.repo called")
			if err != nil {
				return nil, err
			}
...