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# Copyright 2019 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.
"""Example showing how to create a rule that rules_cc can depend on."""
load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain", "use_cpp_toolchain")
load("@rules_cc//cc:action_names.bzl", "CPP_LINK_STATIC_LIBRARY_ACTION_NAME")
load("//examples/my_c_compile:my_c_compile.bzl", "MyCCompileInfo")
def _my_c_archive_impl(ctx):
cc_toolchain = find_cpp_toolchain(ctx)
object_file = ctx.attr.object[MyCCompileInfo].object
output_file = ctx.actions.declare_file(ctx.label.name + ".a")
feature_configuration = cc_common.configure_features(
ctx = ctx,
cc_toolchain = cc_toolchain,
requested_features = ctx.features,
unsupported_features = ctx.disabled_features,
)
linker_input = cc_common.create_linker_input(
owner = ctx.label,
libraries = depset(direct = [
cc_common.create_library_to_link(
actions = ctx.actions,
feature_configuration = feature_configuration,
cc_toolchain = cc_toolchain,
static_library = output_file,
),
]),
)
compilation_context = cc_common.create_compilation_context()
linking_context = cc_common.create_linking_context(linker_inputs = depset(direct = [linker_input]))
archiver_path = cc_common.get_tool_for_action(
feature_configuration = feature_configuration,
action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
)
archiver_variables = cc_common.create_link_variables(
feature_configuration = feature_configuration,
cc_toolchain = cc_toolchain,
output_file = output_file.path,
is_using_linker = False,
)
command_line = cc_common.get_memory_inefficient_command_line(
feature_configuration = feature_configuration,
action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
variables = archiver_variables,
)
args = ctx.actions.args()
args.add_all(command_line)
args.add(object_file)
env = cc_common.get_environment_variables(
feature_configuration = feature_configuration,
action_name = CPP_LINK_STATIC_LIBRARY_ACTION_NAME,
variables = archiver_variables,
)
ctx.actions.run(
executable = archiver_path,
arguments = [args],
env = env,
inputs = depset(
direct = [object_file],
transitive = [
cc_toolchain.all_files,
],
),
outputs = [output_file],
)
cc_info = cc_common.merge_cc_infos(cc_infos = [
CcInfo(compilation_context = compilation_context, linking_context = linking_context),
] + [dep[CcInfo] for dep in ctx.attr.deps])
return [cc_info]
my_c_archive = rule(
implementation = _my_c_archive_impl,
attrs = {
"deps": attr.label_list(providers = [CcInfo]),
"object": attr.label(mandatory = True, providers = [MyCCompileInfo]),
"_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")),
},
fragments = ["cpp"],
toolchains = use_cpp_toolchain(),
)
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