99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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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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*/
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#include "host/libs/config/feature.h"
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#include <unordered_set>
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#include "common/libs/utils/result.h"
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namespace cuttlefish {
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SetupFeature::~SetupFeature() {}
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Result<void> SetupFeature::ResultSetup() {
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CF_EXPECT(Setup());
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return {};
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}
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bool SetupFeature::Setup() {
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LOG(ERROR) << "Missing ResultSetup implementation";
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return false;
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}
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/* static */ Result<void> SetupFeature::RunSetup(
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const std::vector<SetupFeature*>& features) {
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std::unordered_set<SetupFeature*> enabled;
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for (const auto& feature : features) {
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CF_EXPECT(feature != nullptr, "Received null feature");
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if (feature->Enabled()) {
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enabled.insert(feature);
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}
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}
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// Collect these in a vector first to trigger any obvious dependency issues.
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std::vector<SetupFeature*> ordered_features;
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auto add_feature = [&ordered_features](SetupFeature* feature) -> bool {
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ordered_features.push_back(feature);
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return true;
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};
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CF_EXPECT(Feature<SetupFeature>::TopologicalVisit(enabled, add_feature),
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"Dependency issue detected, not performing any setup.");
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// TODO(b/189153501): This can potentially be parallelized.
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for (auto& feature : ordered_features) {
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LOG(DEBUG) << "Running setup for " << feature->Name();
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CF_EXPECT(feature->ResultSetup(), "Setup failed for " << feature->Name());
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}
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return {};
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}
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Result<void> FlagFeature::ProcessFlags(
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const std::vector<FlagFeature*>& features,
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std::vector<std::string>& flags) {
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std::unordered_set<FlagFeature*> features_set(features.begin(),
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features.end());
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CF_EXPECT(features_set.count(nullptr) == 0, "Received null feature");
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auto handle = [&flags](FlagFeature* feature) -> bool {
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return feature->Process(flags);
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};
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CF_EXPECT(
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Feature<FlagFeature>::TopologicalVisit(features_set, handle),
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"Unable to parse flags.");
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return {};
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}
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bool FlagFeature::WriteGflagsHelpXml(const std::vector<FlagFeature*>& features,
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std::ostream& out) {
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// Lifted from external/gflags/src/gflags_reporting.cc:ShowXMLOfFlags
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out << "<?xml version=\"1.0\"?>\n";
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out << "<AllFlags>\n";
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out << " <program>program</program>\n";
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out << " <usage>usage</usage>\n";
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for (const auto& feature : features) {
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if (!feature) {
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LOG(ERROR) << "Received null feature";
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return false;
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}
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if (!feature->WriteGflagsCompatHelpXml(out)) {
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LOG(ERROR) << "Failure to write xml";
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return false;
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}
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}
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out << "</AllFlags>";
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return true;
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}
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} // namespace cuttlefish
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