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// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
//
// 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.
#include "src/other_tools/just_mr/rc_merge.hpp"
#include <algorithm>
#include <iterator>
#include <string>
#include <vector>
#include "src/buildtool/build_engine/expression/expression.hpp"
#include "src/buildtool/build_engine/expression/expression_ptr.hpp"
namespace {
auto const kAccumulating = std::vector<std::string>{"distdirs"};
auto const kLocalMerge =
std::vector<std::string>{"just args", "just files", "invocation log"};
} // namespace
[[nodiscard]] auto MergeMRRC(const Configuration& base,
const Configuration& delta) noexcept
-> Configuration {
// For most fields, just let the delta entry override
auto result = base.Update(delta.Expr());
// Accumulating fields
for (auto const& f : kAccumulating) {
auto joined = Expression::list_t{};
auto const& deltaf = delta[f];
if (deltaf->IsList()) {
std::copy(deltaf->List().begin(),
deltaf->List().end(),
std::back_inserter(joined));
}
auto const& basef = base[f];
if (basef->IsList()) {
std::copy(basef->List().begin(),
basef->List().end(),
std::back_inserter(joined));
}
result = result.Update(
ExpressionPtr{Expression::map_t{f, ExpressionPtr{joined}}});
}
// Locally-merging fields
for (auto const& f : kLocalMerge) {
auto joined = Configuration{Expression::kEmptyMap};
auto const& basef = base[f];
if (basef->IsMap()) {
joined = joined.Update(basef);
}
auto const& deltaf = delta[f];
if (deltaf->IsMap()) {
joined = joined.Update(deltaf);
}
result =
result.Update(ExpressionPtr{Expression::map_t{f, joined.Expr()}});
}
return result;
}
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