98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
# Copyright 2019 Google LLC
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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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# https://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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"""Embeds binary data in cc_*() rules."""
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_FILEWRAPPER = "//sandboxed_api/tools/filewrapper"
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# TODO(cblichmann): Convert this to use a "_cc_toolchain" once Bazel #4370 is
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# fixed.
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def _sapi_cc_embed_data_impl(ctx):
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cc_file_artifact = None
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h_file_artifact = None
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for output in ctx.outputs.outs:
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if output.path.endswith(".h"):
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h_file_artifact = output
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elif output.path.endswith(".cc") or output.path.endswith(".cpp"):
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cc_file_artifact = output
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args = ctx.actions.args()
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args.add(ctx.label.package)
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args.add(ctx.attr.ident)
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args.add(ctx.attr.namespace if ctx.attr.namespace else "")
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args.add(h_file_artifact)
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args.add(cc_file_artifact)
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args.add_all(ctx.files.srcs)
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ctx.actions.run(
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executable = ctx.executable._filewrapper,
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inputs = ctx.files.srcs,
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outputs = [h_file_artifact, cc_file_artifact],
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arguments = [args],
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mnemonic = "CcEmbedData",
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progress_message = (
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"Creating sapi_cc_embed_data file for {}".format(ctx.label)
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),
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)
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_sapi_cc_embed_data = rule(
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implementation = _sapi_cc_embed_data_impl,
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output_to_genfiles = True,
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attrs = {
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"srcs": attr.label_list(
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allow_files = True,
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),
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"namespace": attr.string(),
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"ident": attr.string(),
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"_filewrapper": attr.label(
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executable = True,
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cfg = "host",
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allow_files = True,
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default = Label(_FILEWRAPPER),
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),
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"outs": attr.output_list(),
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},
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)
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def sapi_cc_embed_data(name, srcs = [], namespace = "", **kwargs):
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"""Embeds arbitrary binary data in cc_*() rules.
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Args:
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name: Name for this rule.
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srcs: A list of files to be embedded.
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namespace: C++ namespace to wrap the generated types in.
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**kwargs: extra arguments like testonly, visibility, etc.
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"""
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embed_rule = "_%s_sapi" % name
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_sapi_cc_embed_data(
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name = embed_rule,
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srcs = srcs,
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namespace = namespace,
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ident = name,
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outs = [
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"%s.h" % name,
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"%s.cc" % name,
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],
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)
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native.cc_library(
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name = name,
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hdrs = [":%s.h" % name],
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srcs = [":%s.cc" % name],
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deps = [
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"@com_google_absl//absl/base:core_headers",
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"@com_google_absl//absl/strings",
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],
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**kwargs
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)
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