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# 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/modules:proto_lang_toolchain_info.bzl", "ProtoLangToolchainInfo")
load("//proto/private:native.bzl", "native_proto_common")
proto_common = native_proto_common
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,
)
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