Switch to rules_license

Apparently Bazel has deprecated the built-in licenses() command and now
expects you to pull in an external package. I think I've gotten this
right?

Since our new BUILD.bazel file is actually referenced by the old
-with-bazel branch, this new dependency also needs to work there. That
is still using the legacy WORKSPACE system, but I got that working there
too, I think. However, as the legacy WORKSPACE system does not consider
recursive dependencies, anyone using it and updating BoringSSL will need
to, in turn, update their WORKSPACE file on update.

Fixed: 365824757
Change-Id: I7b49f33d628cec2ec07a47f0e31f16765d0f532a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/71147
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Ben Lawson <benlawson@google.com>
Reviewed-by: Adam Langley <agl@google.com>

BUILD.bazel

@@ -43,14 +43,31 @@ load(
     "urandom_test_sources",
 )
 load(":util/util.bzl", "bssl_cc_binary", "bssl_cc_library", "bssl_cc_test")
+load("@rules_license//rules:license.bzl", "license")
 
-# Disable the parse_headers feature. It does not work well in C right now. See
-# https://github.com/bazelbuild/bazel/issues/23460 for details. When that is
-# fixed, if enabled, we likely also need to rename some headers to .inc per
-# https://google.github.io/styleguide/cppguide.html#Self_contained_Headers
-package(features = ["-parse_headers"])
+package(
+    default_applicable_licenses = [":license"],
+    # Disable the parse_headers feature. It does not work well in C right now.
+    # See https://github.com/bazelbuild/bazel/issues/23460 for details. When
+    # that is fixed, if enabled, we likely also need to rename some headers to
+    # .inc per
+    # https://google.github.io/styleguide/cppguide.html#Self_contained_Headers
+    features = ["-parse_headers"],
+)
 
-licenses(["notice"])
+license(
+    name = "license",
+    package_name = "BoringSSL",
+    # TODO(crbug.com/364634028): Update this once we've aligned with OpenSSL's
+    # new license.
+    license_kinds = [
+        "@rules_license//licenses/spdx:ISC",
+        "@rules_license//licenses/spdx:OpenSSL",
+        "@rules_license//licenses/spdx:MIT",
+        "@rules_license//licenses/spdx:SSLeay-standalone",
+    ],
+    license_text = "LICENSE",
+)
 
 exports_files(["LICENSE"])
 

MODULE.bazel

@@ -34,3 +34,4 @@ bazel_dep(name = "googletest", version = "1.15.2")
 
 bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "rules_cc", version = "0.0.9")
+bazel_dep(name = "rules_license", version = "1.0.0")

util/WORKSPACE.toplevel

@@ -1 +1,11 @@
 workspace(name = "boringssl")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "rules_license",
+    sha256 = "26d4021f6898e23b82ef953078389dd49ac2b5618ac564ade4ef87cced147b38",
+    urls = [
+        "https://github.com/bazelbuild/rules_license/releases/download/1.0.0/rules_license-1.0.0.tar.gz",
+    ],
+)