[various BUILD] "license" target and "default_applicable_licenses"

BUILD

@@ -1,4 +1,16 @@
 load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+load("@rules_license//rules:license.bzl", "license")
+
+package(
+    default_applicable_licenses = [":license"],
+    default_visibility = ["//visibility:private"],
+)
+
+license(
+    name = "license",
+    package_name = "dmlab2d",
+    license_kinds = [],
+)
 
 licenses(["notice"])
 

bazel/BUILD

@@ -1,3 +1,6 @@
-package(default_visibility = ["//visibility:public"])
+package(
+    default_applicable_licenses = ["//:license"],
+    default_visibility = ["//visibility:public"],
+)
 
 licenses(["notice"])

dmlab2d/lib/BUILD

@@ -4,6 +4,11 @@
 
 load("//dmlab2d/lib/testing:lua_testing.bzl", "dmlab2d_lua_level_test", "dmlab2d_lua_test")
 
+package(
+    default_applicable_licenses = ["//:license"],
+    default_visibility = ["//visibility:private"],
+)
+
 licenses(["notice"])
 
 exports_files(["LICENSE"])

third_party/rl_api/BUILD

@@ -1,6 +1,16 @@
 # Description:
 #   DeepMind reinforcement learning APIs.
 
+load("@rules_license//rules:license.bzl", "license")
+
+package(default_applicable_licenses = ["//third_party/rl_api:license"])
+
+license(
+    name = "license",
+    package_name = "rl_api",
+    license_kinds = [],
+)
+
 licenses(["notice"])
 
 exports_files(["LICENSE"])