| # Copyright 2023 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| # Utilities for protocol buffers. |
| # |
| # https://docs.bazel.build/versions/master/skylark/lib/proto_common.html |
| """proto_common module""" |
| |
| load("//proto/private:native.bzl", "native_proto_common") |
| |
| proto_common = native_proto_common |
| |
| ProtoLangToolchainInfo = proto_common.ProtoLangToolchainInfo |
| |
| def _incompatible_toolchains_enabled(): |
| return getattr(proto_common, "INCOMPATIBLE_ENABLE_PROTO_TOOLCHAIN_RESOLUTION", False) |
| |
| def _find_toolchain(ctx, legacy_attr, toolchain_type): |
| if _incompatible_toolchains_enabled(): |
| toolchain = ctx.toolchains[toolchain_type] |
| if not toolchain: |
| fail("No toolchains registered for '%s'." % toolchain_type) |
| return toolchain.proto |
| else: |
| return getattr(ctx.attr, legacy_attr)[ProtoLangToolchainInfo] |
| |
| def _use_toolchain(toolchain_type): |
| if _incompatible_toolchains_enabled(): |
| return [config_common.toolchain_type(toolchain_type, mandatory = False)] |
| else: |
| return [] |
| |
| def _if_legacy_toolchain(legacy_attr_dict): |
| if _incompatible_toolchains_enabled(): |
| return {} |
| else: |
| return legacy_attr_dict |
| |
| toolchains = struct( |
| use_toolchain = _use_toolchain, |
| find_toolchain = _find_toolchain, |
| if_legacy_toolchain = _if_legacy_toolchain, |
| ) |