| # Copyright 2024 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. |
| """Implementation of the cc_toolchain rule.""" |
| |
| load("@bazel_skylib//rules:common_settings.bzl", "BuildSettingInfo") |
| load( |
| "//cc/toolchains:cc_toolchain_info.bzl", |
| "ActionTypeConfigSetInfo", |
| "ActionTypeSetInfo", |
| "ArgsListInfo", |
| "FeatureSetInfo", |
| "ToolchainConfigInfo", |
| ) |
| load(":collect.bzl", "collect_action_types") |
| load(":toolchain_config_info.bzl", "toolchain_config_info") |
| |
| visibility([ |
| "//cc/toolchains/...", |
| "//tests/rule_based_toolchain/...", |
| ]) |
| |
| def _cc_legacy_file_group_impl(ctx): |
| files = ctx.attr.config[ToolchainConfigInfo].files |
| |
| return [DefaultInfo(files = depset(transitive = [ |
| files[action] |
| for action in collect_action_types(ctx.attr.actions).to_list() |
| if action in files |
| ]))] |
| |
| cc_legacy_file_group = rule( |
| implementation = _cc_legacy_file_group_impl, |
| attrs = { |
| "actions": attr.label_list(providers = [ActionTypeSetInfo], mandatory = True), |
| "config": attr.label(providers = [ToolchainConfigInfo], mandatory = True), |
| }, |
| ) |
| |
| def _cc_toolchain_config_impl(ctx): |
| if ctx.attr.features: |
| fail("Features is a reserved attribute in bazel. Did you mean 'toolchain_features'") |
| |
| if not ctx.attr._enabled[BuildSettingInfo].value and not ctx.attr.skip_experimental_flag_validation_for_test: |
| fail("Rule based toolchains are experimental. To use it, please add --//cc/toolchains:experimental_enable_rule_based_toolchains to your bazelrc") |
| |
| toolchain_config = toolchain_config_info( |
| label = ctx.label, |
| features = ctx.attr.toolchain_features + [ctx.attr._builtin_features], |
| action_type_configs = ctx.attr.action_type_configs, |
| args = ctx.attr.args, |
| ) |
| |
| return [ |
| # TODO: Transform toolchain_config into legacy cc_toolchain_config_info |
| toolchain_config, |
| ] |
| |
| cc_toolchain_config = rule( |
| implementation = _cc_toolchain_config_impl, |
| # @unsorted-dict-items |
| attrs = { |
| "action_type_configs": attr.label_list(providers = [ActionTypeConfigSetInfo]), |
| "args": attr.label_list(providers = [ArgsListInfo]), |
| "toolchain_features": attr.label_list(providers = [FeatureSetInfo]), |
| "skip_experimental_flag_validation_for_test": attr.bool(default = False), |
| "_builtin_features": attr.label(default = "//cc/toolchains/features:all_builtin_features"), |
| "_enabled": attr.label(default = "//cc/toolchains:experimental_enable_rule_based_toolchains"), |
| }, |
| provides = [ToolchainConfigInfo], |
| ) |