diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 1d59ab9cf..5bd4e5545 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -988,8 +988,9 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * * } if (i->name == state.sContentAddressed) { - settings.requireExperimentalFeature(Xp::CaDerivations); contentAddressed = state.forceBool(*i->value, pos); + if (contentAddressed) + settings.requireExperimentalFeature(Xp::CaDerivations); } /* The `args' attribute is special: it supplies the diff --git a/src/libstore/binary-cache-store.cc b/src/libstore/binary-cache-store.cc index 5ca14a372..13c086a46 100644 --- a/src/libstore/binary-cache-store.cc +++ b/src/libstore/binary-cache-store.cc @@ -439,40 +439,29 @@ StorePath BinaryCacheStore::addTextToStore(const string & name, const string & s })->path; } -std::optional<const Realisation> BinaryCacheStore::queryRealisation(const DrvOutput & id) +void BinaryCacheStore::queryRealisationUncached(const DrvOutput & id, + Callback<std::shared_ptr<const Realisation>> callback) noexcept { - if (diskCache) { - auto [cacheOutcome, maybeCachedRealisation] = - diskCache->lookupRealisation(getUri(), id); - switch (cacheOutcome) { - case NarInfoDiskCache::oValid: - debug("Returning a cached realisation for %s", id.to_string()); - return *maybeCachedRealisation; - case NarInfoDiskCache::oInvalid: - debug("Returning a cached missing realisation for %s", id.to_string()); - return {}; - case NarInfoDiskCache::oUnknown: - break; - } - } - auto outputInfoFilePath = realisationsPrefix + "/" + id.to_string() + ".doi"; - auto rawOutputInfo = getFile(outputInfoFilePath); - if (rawOutputInfo) { - auto realisation = Realisation::fromJSON( - nlohmann::json::parse(*rawOutputInfo), outputInfoFilePath); + auto callbackPtr = std::make_shared<decltype(callback)>(std::move(callback)); - if (diskCache) - diskCache->upsertRealisation( - getUri(), realisation); + Callback<std::shared_ptr<std::string>> newCallback = { + [=](std::future<std::shared_ptr<std::string>> fut) { + try { + auto data = fut.get(); + if (!data) return (*callbackPtr)(nullptr); - return {realisation}; - } else { - if (diskCache) - diskCache->upsertAbsentRealisation(getUri(), id); - return std::nullopt; - } + auto realisation = Realisation::fromJSON( + nlohmann::json::parse(*data), outputInfoFilePath); + return (*callbackPtr)(std::make_shared<const Realisation>(realisation)); + } catch (...) { + callbackPtr->rethrow(); + } + } + }; + + getFile(outputInfoFilePath, std::move(newCallback)); } void BinaryCacheStore::registerDrvOutput(const Realisation& info) { diff --git a/src/libstore/binary-cache-store.hh b/src/libstore/binary-cache-store.hh index a703994d3..9815af591 100644 --- a/src/libstore/binary-cache-store.hh +++ b/src/libstore/binary-cache-store.hh @@ -108,7 +108,8 @@ public: void registerDrvOutput(const Realisation & info) override; - std::optional<const Realisation> queryRealisation(const DrvOutput &) override; + void queryRealisationUncached(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override; void narFromPath(const StorePath & path, Sink & sink) override; diff --git a/src/libstore/build/drv-output-substitution-goal.cc b/src/libstore/build/drv-output-substitution-goal.cc index be270d079..b9602e696 100644 --- a/src/libstore/build/drv-output-substitution-goal.cc +++ b/src/libstore/build/drv-output-substitution-goal.cc @@ -1,6 +1,8 @@ #include "drv-output-substitution-goal.hh" +#include "finally.hh" #include "worker.hh" #include "substitution-goal.hh" +#include "callback.hh" namespace nix { @@ -50,14 +52,42 @@ void DrvOutputSubstitutionGoal::tryNext() return; } - auto sub = subs.front(); + sub = subs.front(); subs.pop_front(); // FIXME: Make async - outputInfo = sub->queryRealisation(id); + // outputInfo = sub->queryRealisation(id); + outPipe.create(); + promise = decltype(promise)(); + + sub->queryRealisation( + id, { [&](std::future<std::shared_ptr<const Realisation>> res) { + try { + Finally updateStats([this]() { outPipe.writeSide.close(); }); + promise.set_value(res.get()); + } catch (...) { + promise.set_exception(std::current_exception()); + } + } }); + + worker.childStarted(shared_from_this(), {outPipe.readSide.get()}, true, false); + + state = &DrvOutputSubstitutionGoal::realisationFetched; +} + +void DrvOutputSubstitutionGoal::realisationFetched() +{ + worker.childTerminated(this); + + try { + outputInfo = promise.get_future().get(); + } catch (std::exception & e) { + printError(e.what()); + substituterFailed = true; + } + if (!outputInfo) { - tryNext(); - return; + return tryNext(); } for (const auto & [depId, depPath] : outputInfo->dependentRealisations) { @@ -119,4 +149,10 @@ void DrvOutputSubstitutionGoal::work() (this->*state)(); } +void DrvOutputSubstitutionGoal::handleEOF(int fd) +{ + if (fd == outPipe.readSide.get()) worker.wakeUp(shared_from_this()); +} + + } diff --git a/src/libstore/build/drv-output-substitution-goal.hh b/src/libstore/build/drv-output-substitution-goal.hh index 63ab53d89..67ae2624a 100644 --- a/src/libstore/build/drv-output-substitution-goal.hh +++ b/src/libstore/build/drv-output-substitution-goal.hh @@ -3,6 +3,8 @@ #include "store-api.hh" #include "goal.hh" #include "realisation.hh" +#include <thread> +#include <future> namespace nix { @@ -20,11 +22,18 @@ private: // The realisation corresponding to the given output id. // Will be filled once we can get it. - std::optional<Realisation> outputInfo; + std::shared_ptr<const Realisation> outputInfo; /* The remaining substituters. */ std::list<ref<Store>> subs; + /* The current substituter. */ + std::shared_ptr<Store> sub; + + Pipe outPipe; + std::thread thr; + std::promise<std::shared_ptr<const Realisation>> promise; + /* Whether a substituter failed. */ bool substituterFailed = false; @@ -36,6 +45,7 @@ public: void init(); void tryNext(); + void realisationFetched(); void outPathValid(); void finished(); @@ -44,7 +54,7 @@ public: string key() override; void work() override; - + void handleEOF(int fd) override; }; } diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc index 589b449d0..3c7bd695e 100644 --- a/src/libstore/build/local-derivation-goal.cc +++ b/src/libstore/build/local-derivation-goal.cc @@ -1226,13 +1226,14 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo // corresponds to an allowed derivation { throw Error("registerDrvOutput"); } - std::optional<const Realisation> queryRealisation(const DrvOutput & id) override + void queryRealisationUncached(const DrvOutput & id, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override // XXX: This should probably be allowed if the realisation corresponds to // an allowed derivation { if (!goal.isAllowed(id)) - throw InvalidPath("cannot query an unknown output id '%s' in recursive Nix", id.to_string()); - return next->queryRealisation(id); + callback(nullptr); + next->queryRealisation(id, std::move(callback)); } void buildPaths(const std::vector<DerivedPath> & paths, BuildMode buildMode, std::shared_ptr<Store> evalStore) override diff --git a/src/libstore/dummy-store.cc b/src/libstore/dummy-store.cc index 36c6e725c..62dc21c59 100644 --- a/src/libstore/dummy-store.cc +++ b/src/libstore/dummy-store.cc @@ -50,8 +50,9 @@ struct DummyStore : public virtual DummyStoreConfig, public virtual Store void narFromPath(const StorePath & path, Sink & sink) override { unsupported("narFromPath"); } - std::optional<const Realisation> queryRealisation(const DrvOutput&) override - { unsupported("queryRealisation"); } + void queryRealisationUncached(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override + { callback(nullptr); } }; static RegisterStoreImplementation<DummyStore, DummyStoreConfig> regDummyStore; diff --git a/src/libstore/legacy-ssh-store.cc b/src/libstore/legacy-ssh-store.cc index c4fb91364..4861d185e 100644 --- a/src/libstore/legacy-ssh-store.cc +++ b/src/libstore/legacy-ssh-store.cc @@ -367,7 +367,8 @@ public: return conn->remoteVersion; } - std::optional<const Realisation> queryRealisation(const DrvOutput&) override + void queryRealisationUncached(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override // TODO: Implement { unsupported("queryRealisation"); } }; diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc index eecd407f5..64019314f 100644 --- a/src/libstore/local-store.cc +++ b/src/libstore/local-store.cc @@ -1836,13 +1836,24 @@ std::optional<const Realisation> LocalStore::queryRealisation_( return { res }; } -std::optional<const Realisation> -LocalStore::queryRealisation(const DrvOutput & id) +void LocalStore::queryRealisationUncached(const DrvOutput & id, + Callback<std::shared_ptr<const Realisation>> callback) noexcept { - return retrySQLite<std::optional<const Realisation>>([&]() { - auto state(_state.lock()); - return queryRealisation_(*state, id); - }); + try { + auto maybeRealisation + = retrySQLite<std::optional<const Realisation>>([&]() { + auto state(_state.lock()); + return queryRealisation_(*state, id); + }); + if (maybeRealisation) + callback( + std::make_shared<const Realisation>(maybeRealisation.value())); + else + callback(nullptr); + + } catch (...) { + callback.rethrow(); + } } FixedOutputHash LocalStore::hashCAPath( diff --git a/src/libstore/local-store.hh b/src/libstore/local-store.hh index 7ddb1490f..115ea046a 100644 --- a/src/libstore/local-store.hh +++ b/src/libstore/local-store.hh @@ -207,7 +207,8 @@ public: std::optional<const Realisation> queryRealisation_(State & state, const DrvOutput & id); std::optional<std::pair<int64_t, Realisation>> queryRealisationCore_(State & state, const DrvOutput & id); - std::optional<const Realisation> queryRealisation(const DrvOutput&) override; + void queryRealisationUncached(const DrvOutput&, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override; private: diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc index 0e3ef6be4..a627e9cf1 100644 --- a/src/libstore/remote-store.cc +++ b/src/libstore/remote-store.cc @@ -680,23 +680,33 @@ void RemoteStore::registerDrvOutput(const Realisation & info) conn.processStderr(); } -std::optional<const Realisation> RemoteStore::queryRealisation(const DrvOutput & id) +void RemoteStore::queryRealisationUncached(const DrvOutput & id, + Callback<std::shared_ptr<const Realisation>> callback) noexcept { auto conn(getConnection()); conn->to << wopQueryRealisation; conn->to << id.to_string(); conn.processStderr(); - if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) { - auto outPaths = worker_proto::read(*this, conn->from, Phantom<std::set<StorePath>>{}); - if (outPaths.empty()) - return std::nullopt; - return {Realisation{.id = id, .outPath = *outPaths.begin()}}; - } else { - auto realisations = worker_proto::read(*this, conn->from, Phantom<std::set<Realisation>>{}); - if (realisations.empty()) - return std::nullopt; - return *realisations.begin(); - } + + auto real = [&]() -> std::shared_ptr<const Realisation> { + if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) { + auto outPaths = worker_proto::read( + *this, conn->from, Phantom<std::set<StorePath>> {}); + if (outPaths.empty()) + return nullptr; + return std::make_shared<const Realisation>(Realisation { .id = id, .outPath = *outPaths.begin() }); + } else { + auto realisations = worker_proto::read( + *this, conn->from, Phantom<std::set<Realisation>> {}); + if (realisations.empty()) + return nullptr; + return std::make_shared<const Realisation>(*realisations.begin()); + } + }(); + + try { + callback(std::shared_ptr<const Realisation>(real)); + } catch (...) { return callback.rethrow(); } } static void writeDerivedPaths(RemoteStore & store, ConnectionHandle & conn, const std::vector<DerivedPath> & reqs) diff --git a/src/libstore/remote-store.hh b/src/libstore/remote-store.hh index 6c0496b28..0fd67f371 100644 --- a/src/libstore/remote-store.hh +++ b/src/libstore/remote-store.hh @@ -88,7 +88,8 @@ public: void registerDrvOutput(const Realisation & info) override; - std::optional<const Realisation> queryRealisation(const DrvOutput &) override; + void queryRealisationUncached(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept override; void buildPaths(const std::vector<DerivedPath> & paths, BuildMode buildMode, std::shared_ptr<Store> evalStore) override; diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc index ba13026f3..c88dfe179 100644 --- a/src/libstore/store-api.cc +++ b/src/libstore/store-api.cc @@ -542,6 +542,74 @@ void Store::queryPathInfo(const StorePath & storePath, }}); } +void Store::queryRealisation(const DrvOutput & id, + Callback<std::shared_ptr<const Realisation>> callback) noexcept +{ + + try { + if (diskCache) { + auto [cacheOutcome, maybeCachedRealisation] + = diskCache->lookupRealisation(getUri(), id); + switch (cacheOutcome) { + case NarInfoDiskCache::oValid: + debug("Returning a cached realisation for %s", id.to_string()); + callback(maybeCachedRealisation); + return; + case NarInfoDiskCache::oInvalid: + debug( + "Returning a cached missing realisation for %s", + id.to_string()); + callback(nullptr); + return; + case NarInfoDiskCache::oUnknown: + break; + } + } + } catch (...) { + return callback.rethrow(); + } + + auto callbackPtr + = std::make_shared<decltype(callback)>(std::move(callback)); + + queryRealisationUncached( + id, + { [this, id, callbackPtr]( + std::future<std::shared_ptr<const Realisation>> fut) { + try { + auto info = fut.get(); + + if (diskCache) { + if (info) + diskCache->upsertRealisation(getUri(), *info); + else + diskCache->upsertAbsentRealisation(getUri(), id); + } + + (*callbackPtr)(std::shared_ptr<const Realisation>(info)); + + } catch (...) { + callbackPtr->rethrow(); + } + } }); +} + +std::shared_ptr<const Realisation> Store::queryRealisation(const DrvOutput & id) +{ + using RealPtr = std::shared_ptr<const Realisation>; + std::promise<RealPtr> promise; + + queryRealisation(id, + {[&](std::future<RealPtr> result) { + try { + promise.set_value(result.get()); + } catch (...) { + promise.set_exception(std::current_exception()); + } + }}); + + return promise.get_future().get(); +} void Store::substitutePaths(const StorePathSet & paths) { diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh index b7899dd44..aa44651d4 100644 --- a/src/libstore/store-api.hh +++ b/src/libstore/store-api.hh @@ -369,6 +369,14 @@ public: void queryPathInfo(const StorePath & path, Callback<ref<const ValidPathInfo>> callback) noexcept; + /* Query the information about a realisation. */ + std::shared_ptr<const Realisation> queryRealisation(const DrvOutput &); + + /* Asynchronous version of queryRealisation(). */ + void queryRealisation(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept; + + /* Check whether the given valid path info is sufficiently attested, by either being signed by a trusted public key or content-addressed, in order to be included in the given store. @@ -393,11 +401,11 @@ protected: virtual void queryPathInfoUncached(const StorePath & path, Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept = 0; + virtual void queryRealisationUncached(const DrvOutput &, + Callback<std::shared_ptr<const Realisation>> callback) noexcept = 0; public: - virtual std::optional<const Realisation> queryRealisation(const DrvOutput &) = 0; - /* Queries the set of incoming FS references for a store path. The result is not cleared. */ virtual void queryReferrers(const StorePath & path, StorePathSet & referrers)