Label global

Summary: Can be used as type.

Reviewed By: ndmitchell

Differential Revision: D47163560

fbshipit-source-id: 73562cd6107af679cdbefca19bc818495c4baa1b

app/buck2_interpreter/src/types/label.rs

@@ -22,10 +22,12 @@ use starlark::any::ProvidesStaticType;
 use starlark::coerce::Coerce;
 use starlark::collections::StarlarkHasher;
 use starlark::docs::StarlarkDocs;
+use starlark::environment::GlobalsBuilder;
 use starlark::environment::Methods;
 use starlark::environment::MethodsBuilder;
 use starlark::environment::MethodsStatic;
 use starlark::values::starlark_value;
+use starlark::values::starlark_value_as_type::StarlarkValueAsType;
 use starlark::values::AllocValue;
 use starlark::values::Freeze;
 use starlark::values::Heap;
@@ -269,6 +271,11 @@ fn label_methods(builder: &mut MethodsBuilder) {
     }
 }
 
+#[starlark_module]
+pub fn register_label(globals: &mut GlobalsBuilder) {
+    const Label: StarlarkValueAsType<Label> = StarlarkValueAsType::new();
+}
+
 #[cfg(test)]
 mod tests {
     // Tests live in `buck2_build_api` crate because tests depend on `Tester` type

app/buck2_interpreter_for_build/src/interpreter/globals.rs

@@ -10,6 +10,7 @@
 use buck2_interpreter::bxl::BXL_FUNCTIONS;
 use buck2_interpreter::functions::more::MORE_FUNCTIONS;
 use buck2_interpreter::functions::transition::REGISTER_TRANSITION;
+use buck2_interpreter::types::label::register_label;
 use starlark::environment::GlobalsBuilder;
 
 use crate::attrs::attrs_global::register_attrs;
@@ -88,4 +89,5 @@ pub fn configure_extension_file_globals(globals_builder: &mut GlobalsBuilder) {
         .unwrap()
         .register_command_executor_config)(globals_builder);
     register_package_natives(globals_builder);
+    register_label(globals_builder);
 }