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#include "goal.hh"
#include "async-collect.hh"
#include "worker.hh"
#include <boost/outcome/try.hpp>
#include <kj/time.h>
namespace nix {
void Goal::trace(std::string_view s)
{
debug("%1%: %2%", name, s);
}
kj::Promise<void> Goal::waitForAWhile()
{
trace("wait for a while");
/* If we are polling goals that are waiting for a lock, then wake
up after a few seconds at most. */
return worker.aio.provider->getTimer().afterDelay(settings.pollInterval.get() * kj::SECONDS);
}
kj::Promise<Result<Goal::WorkResult>> Goal::work() noexcept
try {
// always clear the slot token, no matter what happens. not doing this
// can cause builds to get stuck on exceptions (or other early exist).
// ideally we'd use scoped slot tokens instead of keeping them in some
// goal member variable, but we cannot do this yet for legacy reasons.
KJ_DEFER({ slotToken = {}; });
BOOST_OUTCOME_CO_TRY(auto result, co_await workImpl());
trace("done");
cleanup();
co_return std::move(result);
} catch (...) {
co_return result::failure(std::current_exception());
}
kj::Promise<Result<void>>
Goal::waitForGoals(kj::Array<std::pair<GoalPtr, kj::Promise<Result<WorkResult>>>> dependencies) noexcept
try {
auto left = dependencies.size();
for (auto & [dep, p] : dependencies) {
p = p.then([this, dep, &left](auto _result) -> Result<WorkResult> {
BOOST_OUTCOME_TRY(auto result, _result);
left--;
trace(fmt("waitee '%s' done; %d left", dep->name, left));
if (result.exitCode != Goal::ecSuccess) ++nrFailed;
if (result.exitCode == Goal::ecNoSubstituters) ++nrNoSubstituters;
if (result.exitCode == Goal::ecIncompleteClosure) ++nrIncompleteClosure;
return std::move(result);
}).eagerlyEvaluate(nullptr);
}
auto collectDeps = asyncCollect(std::move(dependencies));
while (auto item = co_await collectDeps.next()) {
auto & [dep, _result] = *item;
BOOST_OUTCOME_CO_TRY(auto result, _result);
waiteeDone(dep);
if (result.exitCode == ecFailed && !settings.keepGoing) {
co_return result::success();
}
}
co_return result::success();
} catch (...) {
co_return result::failure(std::current_exception());
}
}
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