mirror of
https://github.com/bazelbuild/rules_cc
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100 lines
3.7 KiB
Python
100 lines
3.7 KiB
Python
# Copyright 2019 The Bazel Authors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Example showing how to create a rule that rules_cc can depend on."""
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load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain", "use_cpp_toolchain")
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load("@rules_cc//cc:action_names.bzl", "CPP_LINK_STATIC_LIBRARY_ACTION_NAME")
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load("//examples/my_c_compile:my_c_compile.bzl", "MyCCompileInfo")
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def _my_c_archive_impl(ctx):
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cc_toolchain = find_cpp_toolchain(ctx)
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object_file = ctx.attr.object[MyCCompileInfo].object
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output_file = ctx.actions.declare_file(ctx.label.name + ".a")
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feature_configuration = cc_common.configure_features(
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ctx = ctx,
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cc_toolchain = cc_toolchain,
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requested_features = ctx.features,
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unsupported_features = ctx.disabled_features,
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)
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linker_input = cc_common.create_linker_input(
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owner = ctx.label,
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libraries = depset(direct = [
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cc_common.create_library_to_link(
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actions = ctx.actions,
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feature_configuration = feature_configuration,
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cc_toolchain = cc_toolchain,
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static_library = output_file,
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),
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]),
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)
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compilation_context = cc_common.create_compilation_context()
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linking_context = cc_common.create_linking_context(linker_inputs = depset(direct = [linker_input]))
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archiver_path = cc_common.get_tool_for_action(
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feature_configuration = feature_configuration,
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action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
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)
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archiver_variables = cc_common.create_link_variables(
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feature_configuration = feature_configuration,
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cc_toolchain = cc_toolchain,
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output_file = output_file.path,
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is_using_linker = False,
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)
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command_line = cc_common.get_memory_inefficient_command_line(
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feature_configuration = feature_configuration,
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action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
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variables = archiver_variables,
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)
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args = ctx.actions.args()
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args.add_all(command_line)
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args.add(object_file)
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env = cc_common.get_environment_variables(
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feature_configuration = feature_configuration,
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action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
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variables = archiver_variables,
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)
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ctx.actions.run(
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executable = archiver_path,
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arguments = [args],
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env = env,
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inputs = depset(
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direct = [object_file],
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transitive = [
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cc_toolchain.all_files,
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],
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),
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outputs = [output_file],
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)
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cc_info = cc_common.merge_cc_infos(cc_infos = [
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CcInfo(compilation_context = compilation_context, linking_context = linking_context),
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] + [dep[CcInfo] for dep in ctx.attr.deps])
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return [cc_info]
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my_c_archive = rule(
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implementation = _my_c_archive_impl,
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attrs = {
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"deps": attr.label_list(providers = [CcInfo]),
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"object": attr.label(mandatory = True, providers = [MyCCompileInfo]),
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"_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")),
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},
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fragments = ["cpp"],
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toolchains = use_cpp_toolchain(), # copybara-use-repo-external-label
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)
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