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// Copyright 2018 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.
package com.google.devtools.build.lib.rules.cpp;
import com.google.devtools.build.lib.analysis.util.AnalysisMock;
import com.google.devtools.build.lib.testutil.Scratch;
/** Methods useful for tests testing the C++ Skylark API. */
public final class SkylarkCcCommonTestHelper {
public static final String CC_SKYLARK_WHITELIST_FLAG =
"--experimental_cc_skylark_api_enabled_packages=tools/build_defs,experimental";
public static void createFilesForTestingCompilation(
Scratch scratch, String bzlFilePath, String compileProviderLines) throws Exception {
createFiles(scratch, bzlFilePath, compileProviderLines, "");
}
public static void createFilesForTestingLinking(
Scratch scratch, String bzlFilePath, String linkProviderLines) throws Exception {
createFiles(scratch, bzlFilePath, "", linkProviderLines);
}
public static void createFiles(Scratch scratch, String bzlFilePath) throws Exception {
createFiles(scratch, bzlFilePath, "", "");
}
public static void createFiles(
Scratch scratch, String bzlFilePath, String compileProviderLines, String linkProviderLines)
throws Exception {
String fragments = " fragments = ['google_cpp', 'cpp'],";
if (AnalysisMock.get().isThisBazel()) {
fragments = " fragments = ['cpp'],";
}
scratch.file(bzlFilePath + "/BUILD");
scratch.file(
bzlFilePath + "/extension.bzl",
"def _cc_skylark_library_impl(ctx):",
" dep_cc_linking_infos = []",
" for dep in ctx.attr._deps:",
" dep_cc_linking_infos.append(dep[CcLinkingInfo])",
" toolchain = ctx.attr._cc_toolchain[cc_common.CcToolchainInfo]",
" feature_configuration = cc_common.configure_features(",
" cc_toolchain=toolchain,",
" requested_features = ctx.features,",
" unsupported_features = ctx.disabled_features)",
" compilation_info = cc_common.compile(",
" ctx=ctx,",
" feature_configuration=feature_configuration,",
" cc_toolchain=toolchain,",
" srcs=ctx.files.srcs,",
" hdrs=ctx.files.hdrs" + (compileProviderLines.isEmpty() ? "" : ","),
" " + compileProviderLines,
" )",
" linking_info = cc_common.link(",
" ctx=ctx,",
" feature_configuration=feature_configuration,",
" cc_compilation_outputs=compilation_info.cc_compilation_outputs(),",
" cc_toolchain=toolchain" + (linkProviderLines.isEmpty() ? "" : ","),
" " + linkProviderLines,
" )",
" files_to_build = []",
" files_to_build.extend(compilation_info.cc_compilation_outputs()",
" .object_files(use_pic=True))",
" files_to_build.extend(compilation_info.cc_compilation_outputs()",
" .object_files(use_pic=False))",
" static_libs = linking_info.cc_linking_outputs().pic_static_libraries()",
" for static_lib in static_libs:",
" files_to_build.append(static_lib.original_artifact())",
" dynamic_libs = linking_info.cc_linking_outputs().dynamic_libraries_for_linking()",
" for dynamic_lib in dynamic_libs:",
" files_to_build.append(dynamic_lib.original_artifact())",
" return struct(",
" libraries=dynamic_libs,",
" providers=[DefaultInfo(files=depset(files_to_build)),",
" cc_common.create_cc_skylark_info(ctx=ctx),",
" compilation_info.cc_compilation_info(),",
" linking_info.cc_linking_info()])",
"cc_skylark_library = rule(",
" implementation = _cc_skylark_library_impl,",
" attrs = {",
" 'srcs': attr.label_list(allow_files=True),",
" 'hdrs': attr.label_list(allow_files=True),",
" '_deps': attr.label_list(default=['//foo:dep1', '//foo:dep2']),",
" '_cc_toolchain': attr.label(default =",
" configuration_field(fragment = 'cpp', name = 'cc_toolchain'))",
" },",
fragments,
")");
scratch.file(
"foo/BUILD",
"load('//" + bzlFilePath + ":extension.bzl', 'cc_skylark_library')",
"cc_library(",
" name = 'dep1',",
" srcs = ['dep1.cc'],",
" hdrs = ['dep1.h'],",
" linkopts = ['-DEP1_LINKOPT'],",
")",
"cc_library(",
" name = 'dep2',",
" srcs = ['dep2.cc'],",
" hdrs = ['dep2.h'],",
" linkopts = ['-DEP2_LINKOPT'],",
")",
"cc_skylark_library(",
" name = 'skylark_lib',",
" srcs = ['skylark_lib.cc'],",
" hdrs = ['skylark_lib.h'],",
")",
"cc_binary(",
" name = 'bin',",
" deps = ['skylark_lib'],",
")");
}
}
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