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libstore: turn DrvOutputSubstitutionGoal::work into *one* promise

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Change-Id: I2d4dcedff0a278d2d8f3d264a9186dfb399275e2
This commit is contained in:
eldritch horrors 2024-09-30 01:31:30 +02:00
parent 9b05636937
commit 3edc272341
2 changed files with 22 additions and 38 deletions
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50
src/libstore/build/drv-output-substitution-goal.cc
View file

@ -19,36 +19,32 @@ DrvOutputSubstitutionGoal::DrvOutputSubstitutionGoal(
: Goal(worker, isDependency) : Goal(worker, isDependency)
, id(id) , id(id)
{ {
state = &DrvOutputSubstitutionGoal::init;
name = fmt("substitution of '%s'", id.to_string()); name = fmt("substitution of '%s'", id.to_string());
trace("created"); trace("created");
} }
kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::init(bool inBuildSlot) noexcept kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::work() noexcept
try { try {
trace("init"); trace("init");
/* If the derivation already exists, we’re done */ /* If the derivation already exists, we’re done */
if (worker.store.queryRealisation(id)) { if (worker.store.queryRealisation(id)) {
return {Finished{ecSuccess, std::move(buildResult)}}; co_return Finished{ecSuccess, std::move(buildResult)};
} }
subs = settings.useSubstitutes ? getDefaultSubstituters() : std::list<ref<Store>>(); subs = settings.useSubstitutes ? getDefaultSubstituters() : std::list<ref<Store>>();
return tryNext(inBuildSlot); co_return co_await tryNext();
} catch (...) { } catch (...) {
return {std::current_exception()}; co_return result::failure(std::current_exception());
} }
kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::tryNext(bool inBuildSlot) noexcept kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::tryNext() noexcept
try { try {
trace("trying next substituter"); trace("trying next substituter");
if (!inBuildSlot) { if (!slotToken.valid()) {
return worker.substitutions.acquire().then([this](auto token) { slotToken = co_await worker.substitutions.acquire();
slotToken = std::move(token);
return work();
});
} }
maintainRunningSubstitutions = worker.runningSubstitutions.addTemporarily(1); maintainRunningSubstitutions = worker.runningSubstitutions.addTemporarily(1);
@ -65,7 +61,7 @@ try {
/* Hack: don't indicate failure if there were no substituters. /* Hack: don't indicate failure if there were no substituters.
In that case the calling derivation should just do a In that case the calling derivation should just do a
build. */ build. */
return {Finished{substituterFailed ? ecFailed : ecNoSubstituters, std::move(buildResult)}}; co_return Finished{substituterFailed ? ecFailed : ecNoSubstituters, std::move(buildResult)};
} }
sub = subs.front(); sub = subs.front();
@ -85,13 +81,13 @@ try {
return sub->queryRealisation(id); return sub->queryRealisation(id);
}); });
state = &DrvOutputSubstitutionGoal::realisationFetched; co_await pipe.promise;
return pipe.promise.then([]() -> Result<WorkResult> { return StillAlive{}; }); co_return co_await realisationFetched();
} catch (...) { } catch (...) {
return {std::current_exception()}; co_return result::failure(std::current_exception());
} }
kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::realisationFetched(bool inBuildSlot) noexcept kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::realisationFetched() noexcept
try { try {
maintainRunningSubstitutions.reset(); maintainRunningSubstitutions.reset();
slotToken = {}; slotToken = {};
@ -104,7 +100,7 @@ try {
} }
if (!outputInfo) { if (!outputInfo) {
return tryNext(inBuildSlot); co_return co_await tryNext();
} }
kj::Vector<std::pair<GoalPtr, kj::Promise<void>>> dependencies; kj::Vector<std::pair<GoalPtr, kj::Promise<void>>> dependencies;
@ -121,7 +117,7 @@ try {
worker.store.printStorePath(localOutputInfo->outPath), worker.store.printStorePath(localOutputInfo->outPath),
worker.store.printStorePath(depPath) worker.store.printStorePath(depPath)
); );
return tryNext(inBuildSlot); co_return co_await tryNext();
} }
dependencies.add(worker.goalFactory().makeDrvOutputSubstitutionGoal(depId)); dependencies.add(worker.goalFactory().makeDrvOutputSubstitutionGoal(depId));
} }
@ -129,17 +125,15 @@ try {
dependencies.add(worker.goalFactory().makePathSubstitutionGoal(outputInfo->outPath)); dependencies.add(worker.goalFactory().makePathSubstitutionGoal(outputInfo->outPath));
if (dependencies.empty()) { if (!dependencies.empty()) {
return outPathValid(inBuildSlot); (co_await waitForGoals(dependencies.releaseAsArray())).value();
} else {
state = &DrvOutputSubstitutionGoal::outPathValid;
return waitForGoals(dependencies.releaseAsArray());
} }
co_return co_await outPathValid();
} catch (...) { } catch (...) {
return {std::current_exception()}; co_return result::failure(std::current_exception());
} }
kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::outPathValid(bool inBuildSlot) noexcept kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::outPathValid() noexcept
try { try {
assert(outputInfo); assert(outputInfo);
trace("output path substituted"); trace("output path substituted");
@ -166,10 +160,4 @@ try {
return {std::current_exception()}; return {std::current_exception()};
} }
kj::Promise<Result<Goal::WorkResult>> DrvOutputSubstitutionGoal::work() noexcept
{
return (this->*state)(slotToken.valid());
}
} }

10
src/libstore/build/drv-output-substitution-goal.hh
View file

@ -65,13 +65,9 @@ public:
std::optional<ContentAddress> ca = std::nullopt std::optional<ContentAddress> ca = std::nullopt
); );
typedef kj::Promise<Result<WorkResult>> (DrvOutputSubstitutionGoal::*GoalState)(bool inBuildSlot) noexcept; kj::Promise<Result<WorkResult>> tryNext() noexcept;
GoalState state; kj::Promise<Result<WorkResult>> realisationFetched() noexcept;
kj::Promise<Result<WorkResult>> outPathValid() noexcept;
kj::Promise<Result<WorkResult>> init(bool inBuildSlot) noexcept;
kj::Promise<Result<WorkResult>> tryNext(bool inBuildSlot) noexcept;
kj::Promise<Result<WorkResult>> realisationFetched(bool inBuildSlot) noexcept;
kj::Promise<Result<WorkResult>> outPathValid(bool inBuildSlot) noexcept;
kj::Promise<Result<WorkResult>> finished() noexcept; kj::Promise<Result<WorkResult>> finished() noexcept;
kj::Promise<Result<WorkResult>> work() noexcept override; kj::Promise<Result<WorkResult>> work() noexcept override;