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#include "src/buildtool/build_engine/target_map/export.hpp"
#include <unordered_set>
#include "src/buildtool/build_engine/base_maps/field_reader.hpp"
#include "src/buildtool/build_engine/expression/configuration.hpp"
#include "src/buildtool/build_engine/target_map/target_cache.hpp"
#include "src/buildtool/common/statistics.hpp"
#include "src/buildtool/execution_api/local/local_cas.hpp"
namespace {
auto const kExpectedFields = std::unordered_set<std::string>{"config_doc",
"doc",
"fixed_config",
"flexible_config",
"target",
"type"};
void FinalizeExport(
const std::vector<AnalysedTargetPtr const*>& exported,
const BuildMaps::Base::EntityName& target,
const std::vector<std::string>& vars,
const Configuration& effective_config,
const std::optional<TargetCache::Key>& target_cache_key,
const BuildMaps::Target::TargetMap::LoggerPtr& logger,
const BuildMaps::Target::TargetMap::SetterPtr& setter,
const gsl::not_null<BuildMaps::Target::ResultTargetMap*>& result_map) {
const auto* value = exported[0];
if (not(*value)->Tainted().empty()) {
(*logger)("Only untainted targets can be exported.", true);
return;
}
auto provides = (*value)->Provides();
if (not provides->IsCacheable()) {
(*logger)(fmt::format("Only cacheable values can be exported; but "
"target provides {}",
provides->ToString()),
true);
return;
}
std::unordered_set<std::string> vars_set{};
vars_set.insert(vars.begin(), vars.end());
auto analysis_result = std::make_shared<AnalysedTarget>(
TargetResult{(*value)->Artifacts(), provides, (*value)->RunFiles()},
std::vector<ActionDescription::Ptr>{},
std::vector<std::string>{},
std::vector<Tree::Ptr>{},
std::move(vars_set),
std::set<std::string>{});
analysis_result = result_map->Add(
target, effective_config, std::move(analysis_result), target_cache_key);
(*setter)(std::move(analysis_result));
}
} // namespace
void ExportRule(
const nlohmann::json& desc_json,
const BuildMaps::Target::ConfiguredTarget& key,
const BuildMaps::Target::TargetMap::SubCallerPtr& subcaller,
const BuildMaps::Target::TargetMap::SetterPtr& setter,
const BuildMaps::Target::TargetMap::LoggerPtr& logger,
const gsl::not_null<BuildMaps::Target::ResultTargetMap*> result_map) {
auto desc = BuildMaps::Base::FieldReader::CreatePtr(
desc_json, key.target, "export target", logger);
desc->ExpectFields(kExpectedFields);
auto exported_target_name = desc->ReadExpression("target");
if (not exported_target_name) {
return;
}
auto exported_target = BuildMaps::Base::ParseEntityNameFromExpression(
exported_target_name,
key.target,
[&logger, &exported_target_name](std::string const& parse_err) {
(*logger)(fmt::format("Parsing target name {} failed with:\n{}",
exported_target_name->ToString(),
parse_err),
true);
});
if (not exported_target) {
return;
}
auto flexible_vars = desc->ReadStringList("flexible_config");
if (not flexible_vars) {
return;
}
auto effective_config = key.config.Prune(*flexible_vars);
auto fixed_config =
desc->ReadOptionalExpression("fixed_config", Expression::kEmptyMap);
if (not fixed_config->IsMap()) {
(*logger)(fmt::format("fixed_config has to be a map, but found {}",
fixed_config->ToString()),
true);
return;
}
for (auto const& var : fixed_config->Map().Keys()) {
if (effective_config.VariableFixed(var)) {
(*logger)(
fmt::format("Variable {} is both fixed and flexible.", var),
true);
return;
}
}
auto target_config = effective_config.Update(fixed_config);
auto target_cache_key =
TargetCache::Key::Create(*exported_target, target_config);
if (target_cache_key) {
if (auto target_cache_value =
TargetCache::Instance().Read(*target_cache_key)) {
auto const& [entry, info] = *target_cache_value;
if (auto result = entry.ToResult()) {
auto analysis_result = std::make_shared<AnalysedTarget>(
*result,
std::vector<ActionDescription::Ptr>{},
std::vector<std::string>{},
std::vector<Tree::Ptr>{},
std::unordered_set<std::string>{flexible_vars->begin(),
flexible_vars->end()},
std::set<std::string>{});
analysis_result = result_map->Add(
key.target, effective_config, std::move(analysis_result));
Logger::Log(LogLevel::Performance,
"Export target {} served from cache: {} -> {}",
key.target.ToString(),
target_cache_key->Id().ToString(),
info.ToString());
(*setter)(std::move(analysis_result));
Statistics::Instance().IncrementExportsCachedCounter();
return;
}
(*logger)(fmt::format("Reading target entry for key {} failed",
target_cache_key->Id().ToString()),
false);
}
else {
Statistics::Instance().IncrementExportsUncachedCounter();
Logger::Log(LogLevel::Performance,
"Export target {} registered for caching: {}",
key.target.ToString(),
target_cache_key->Id().ToString());
}
}
else {
Statistics::Instance().IncrementExportsNotEligibleCounter();
Logger::Log(LogLevel::Performance,
"Export target {} is not eligible for target caching",
key.target.ToString());
}
(*subcaller)(
{BuildMaps::Target::ConfiguredTarget{std::move(*exported_target),
std::move(target_config)}},
[setter,
logger,
vars = std::move(*flexible_vars),
result_map,
effective_config = std::move(effective_config),
target_cache_key = std::move(target_cache_key),
target = key.target](auto const& values) {
FinalizeExport(values,
target,
vars,
effective_config,
target_cache_key,
logger,
setter,
result_map);
},
logger);
}
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