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Revert "Revert "Use template structs instead of phantoms""

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This is the more typically way to do [Argument-dependent
lookup](https://en.cppreference.com/w/cpp/language/adl)-leveraging
generic serializers in C++. It makes the relationship between the `read`
and `write` methods more clear and rigorous, and also looks more
familiar to users coming from other languages that do not have C++'s
libertine ad-hoc overloading.

I am returning to this because during the review in
https://github.com/NixOS/nix/pull/6223, it came up as something that
would make the code easier to read --- easier today hopefully already,
but definitely easier if we were have multiple codified protocols with
code sharing between them as that PR seeks to accomplish.

If I recall correctly, the main criticism of this the first time around
(in 2020) was that having to specify the type when writing, e.g.
`WorkerProto<MyType>::write`, was too verbose and cumbersome. This is
now addressed with the `workerProtoWrite` wrapper function.

This method is also the way `nlohmann::json`, which we have used for a
number of years now, does its serializers, for what its worth.

This reverts commit 45a0ed82f0. That
commit in turn reverted 9ab07e99f5.
This commit is contained in:
John Ericson 2023-05-17 22:04:59 -04:00
parent 684e9be8b9
commit cb5052d98f
10 changed files with 182 additions and 151 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/libstore/build/derivation-goal.cc
View file

@ -1152,7 +1152,7 @@ HookReply DerivationGoal::tryBuildHook()
/* Tell the hook all the inputs that have to be copied to the /* Tell the hook all the inputs that have to be copied to the
remote system. */ remote system. */
worker_proto::write(worker.store, hook->sink, inputPaths); workerProtoWrite(worker.store, hook->sink, inputPaths);
/* Tell the hooks the missing outputs that have to be copied back /* Tell the hooks the missing outputs that have to be copied back
from the remote system. */ from the remote system. */
@ -1163,7 +1163,7 @@ HookReply DerivationGoal::tryBuildHook()
if (buildMode != bmCheck && status.known && status.known->isValid()) continue; if (buildMode != bmCheck && status.known && status.known->isValid()) continue;
missingOutputs.insert(outputName); missingOutputs.insert(outputName);
} }
worker_proto::write(worker.store, hook->sink, missingOutputs); workerProtoWrite(worker.store, hook->sink, missingOutputs);
} }
hook->sink = FdSink(); hook->sink = FdSink();

50
src/libstore/daemon.cc
View file

@ -263,7 +263,7 @@ static std::vector<DerivedPath> readDerivedPaths(Store & store, unsigned int cli
{ {
std::vector<DerivedPath> reqs; std::vector<DerivedPath> reqs;
if (GET_PROTOCOL_MINOR(clientVersion) >= 30) { if (GET_PROTOCOL_MINOR(clientVersion) >= 30) {
reqs = worker_proto::read(store, from, Phantom<std::vector<DerivedPath>> {}); reqs = WorkerProto<std::vector<DerivedPath>>::read(store, from);
} else { } else {
for (auto & s : readStrings<Strings>(from)) for (auto & s : readStrings<Strings>(from))
reqs.push_back(parsePathWithOutputs(store, s).toDerivedPath()); reqs.push_back(parsePathWithOutputs(store, s).toDerivedPath());
@ -287,7 +287,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
} }
case wopQueryValidPaths: { case wopQueryValidPaths: {
auto paths = worker_proto::read(*store, from, Phantom<StorePathSet> {}); auto paths = WorkerProto<StorePathSet>::read(*store, from);
SubstituteFlag substitute = NoSubstitute; SubstituteFlag substitute = NoSubstitute;
if (GET_PROTOCOL_MINOR(clientVersion) >= 27) { if (GET_PROTOCOL_MINOR(clientVersion) >= 27) {
@ -300,7 +300,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
} }
auto res = store->queryValidPaths(paths, substitute); auto res = store->queryValidPaths(paths, substitute);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, res); workerProtoWrite(*store, to, res);
break; break;
} }
@ -316,11 +316,11 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
} }
case wopQuerySubstitutablePaths: { case wopQuerySubstitutablePaths: {
auto paths = worker_proto::read(*store, from, Phantom<StorePathSet> {}); auto paths = WorkerProto<StorePathSet>::read(*store, from);
logger->startWork(); logger->startWork();
auto res = store->querySubstitutablePaths(paths); auto res = store->querySubstitutablePaths(paths);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, res); workerProtoWrite(*store, to, res);
break; break;
} }
@ -349,7 +349,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
paths = store->queryValidDerivers(path); paths = store->queryValidDerivers(path);
else paths = store->queryDerivationOutputs(path); else paths = store->queryDerivationOutputs(path);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, paths); workerProtoWrite(*store, to, paths);
break; break;
} }
@ -367,7 +367,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork(); logger->startWork();
auto outputs = store->queryPartialDerivationOutputMap(path); auto outputs = store->queryPartialDerivationOutputMap(path);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, outputs); workerProtoWrite(*store, to, outputs);
break; break;
} }
@ -393,7 +393,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
if (GET_PROTOCOL_MINOR(clientVersion) >= 25) { if (GET_PROTOCOL_MINOR(clientVersion) >= 25) {
auto name = readString(from); auto name = readString(from);
auto camStr = readString(from); auto camStr = readString(from);
auto refs = worker_proto::read(*store, from, Phantom<StorePathSet> {}); auto refs = WorkerProto<StorePathSet>::read(*store, from);
bool repairBool; bool repairBool;
from >> repairBool; from >> repairBool;
auto repair = RepairFlag{repairBool}; auto repair = RepairFlag{repairBool};
@ -495,7 +495,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopAddTextToStore: { case wopAddTextToStore: {
std::string suffix = readString(from); std::string suffix = readString(from);
std::string s = readString(from); std::string s = readString(from);
auto refs = worker_proto::read(*store, from, Phantom<StorePathSet> {}); auto refs = WorkerProto<StorePathSet>::read(*store, from);
logger->startWork(); logger->startWork();
auto path = store->addTextToStore(suffix, s, refs, NoRepair); auto path = store->addTextToStore(suffix, s, refs, NoRepair);
logger->stopWork(); logger->stopWork();
@ -567,7 +567,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
auto results = store->buildPathsWithResults(drvs, mode); auto results = store->buildPathsWithResults(drvs, mode);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, results); workerProtoWrite(*store, to, results);
break; break;
} }
@ -644,7 +644,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
DrvOutputs builtOutputs; DrvOutputs builtOutputs;
for (auto & [output, realisation] : res.builtOutputs) for (auto & [output, realisation] : res.builtOutputs)
builtOutputs.insert_or_assign(realisation.id, realisation); builtOutputs.insert_or_assign(realisation.id, realisation);
worker_proto::write(*store, to, builtOutputs); workerProtoWrite(*store, to, builtOutputs);
} }
break; break;
} }
@ -709,7 +709,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
case wopCollectGarbage: { case wopCollectGarbage: {
GCOptions options; GCOptions options;
options.action = (GCOptions::GCAction) readInt(from); options.action = (GCOptions::GCAction) readInt(from);
options.pathsToDelete = worker_proto::read(*store, from, Phantom<StorePathSet> {}); options.pathsToDelete = WorkerProto<StorePathSet>::read(*store, from);
from >> options.ignoreLiveness >> options.maxFreed; from >> options.ignoreLiveness >> options.maxFreed;
// obsolete fields // obsolete fields
readInt(from); readInt(from);
@ -779,7 +779,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
else { else {
to << 1 to << 1
<< (i->second.deriver ? store->printStorePath(*i->second.deriver) : ""); << (i->second.deriver ? store->printStorePath(*i->second.deriver) : "");
worker_proto::write(*store, to, i->second.references); workerProtoWrite(*store, to, i->second.references);
to << i->second.downloadSize to << i->second.downloadSize
<< i->second.narSize; << i->second.narSize;
} }
@ -790,11 +790,11 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
SubstitutablePathInfos infos; SubstitutablePathInfos infos;
StorePathCAMap pathsMap = {}; StorePathCAMap pathsMap = {};
if (GET_PROTOCOL_MINOR(clientVersion) < 22) { if (GET_PROTOCOL_MINOR(clientVersion) < 22) {
auto paths = worker_proto::read(*store, from, Phantom<StorePathSet> {}); auto paths = WorkerProto<StorePathSet>::read(*store, from);
for (auto & path : paths) for (auto & path : paths)
pathsMap.emplace(path, std::nullopt); pathsMap.emplace(path, std::nullopt);
} else } else
pathsMap = worker_proto::read(*store, from, Phantom<StorePathCAMap> {}); pathsMap = WorkerProto<StorePathCAMap>::read(*store, from);
logger->startWork(); logger->startWork();
store->querySubstitutablePathInfos(pathsMap, infos); store->querySubstitutablePathInfos(pathsMap, infos);
logger->stopWork(); logger->stopWork();
@ -802,7 +802,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
for (auto & i : infos) { for (auto & i : infos) {
to << store->printStorePath(i.first) to << store->printStorePath(i.first)
<< (i.second.deriver ? store->printStorePath(*i.second.deriver) : ""); << (i.second.deriver ? store->printStorePath(*i.second.deriver) : "");
worker_proto::write(*store, to, i.second.references); workerProtoWrite(*store, to, i.second.references);
to << i.second.downloadSize << i.second.narSize; to << i.second.downloadSize << i.second.narSize;
} }
break; break;
@ -812,7 +812,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork(); logger->startWork();
auto paths = store->queryAllValidPaths(); auto paths = store->queryAllValidPaths();
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, paths); workerProtoWrite(*store, to, paths);
break; break;
} }
@ -884,7 +884,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
ValidPathInfo info { path, narHash }; ValidPathInfo info { path, narHash };
if (deriver != "") if (deriver != "")
info.deriver = store->parseStorePath(deriver); info.deriver = store->parseStorePath(deriver);
info.references = worker_proto::read(*store, from, Phantom<StorePathSet> {}); info.references = WorkerProto<StorePathSet>::read(*store, from);
from >> info.registrationTime >> info.narSize >> info.ultimate; from >> info.registrationTime >> info.narSize >> info.ultimate;
info.sigs = readStrings<StringSet>(from); info.sigs = readStrings<StringSet>(from);
info.ca = ContentAddress::parseOpt(readString(from)); info.ca = ContentAddress::parseOpt(readString(from));
@ -935,9 +935,9 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
uint64_t downloadSize, narSize; uint64_t downloadSize, narSize;
store->queryMissing(targets, willBuild, willSubstitute, unknown, downloadSize, narSize); store->queryMissing(targets, willBuild, willSubstitute, unknown, downloadSize, narSize);
logger->stopWork(); logger->stopWork();
worker_proto::write(*store, to, willBuild); workerProtoWrite(*store, to, willBuild);
worker_proto::write(*store, to, willSubstitute); workerProtoWrite(*store, to, willSubstitute);
worker_proto::write(*store, to, unknown); workerProtoWrite(*store, to, unknown);
to << downloadSize << narSize; to << downloadSize << narSize;
break; break;
} }
@ -950,7 +950,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
store->registerDrvOutput(Realisation{ store->registerDrvOutput(Realisation{
.id = outputId, .outPath = outputPath}); .id = outputId, .outPath = outputPath});
} else { } else {
auto realisation = worker_proto::read(*store, from, Phantom<Realisation>()); auto realisation = WorkerProto<Realisation>::read(*store, from);
store->registerDrvOutput(realisation); store->registerDrvOutput(realisation);
} }
logger->stopWork(); logger->stopWork();
@ -965,11 +965,11 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
if (GET_PROTOCOL_MINOR(clientVersion) < 31) { if (GET_PROTOCOL_MINOR(clientVersion) < 31) {
std::set<StorePath> outPaths; std::set<StorePath> outPaths;
if (info) outPaths.insert(info->outPath); if (info) outPaths.insert(info->outPath);
worker_proto::write(*store, to, outPaths); workerProtoWrite(*store, to, outPaths);
} else { } else {
std::set<Realisation> realisations; std::set<Realisation> realisations;
if (info) realisations.insert(*info); if (info) realisations.insert(*info);
worker_proto::write(*store, to, realisations); workerProtoWrite(*store, to, realisations);
} }
break; break;
} }
@ -1045,7 +1045,7 @@ void processConnection(
auto temp = trusted auto temp = trusted
? store->isTrustedClient() ? store->isTrustedClient()
: std::optional { NotTrusted }; : std::optional { NotTrusted };
worker_proto::write(*store, to, temp); workerProtoWrite(*store, to, temp);
} }
/* Send startup error messages to the client. */ /* Send startup error messages to the client. */

4
src/libstore/derivations.cc
View file

@ -748,7 +748,7 @@ Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv,
drv.outputs.emplace(std::move(name), std::move(output)); drv.outputs.emplace(std::move(name), std::move(output));
} }
drv.inputSrcs = worker_proto::read(store, in, Phantom<StorePathSet> {}); drv.inputSrcs = WorkerProto<StorePathSet>::read(store, in);
in >> drv.platform >> drv.builder; in >> drv.platform >> drv.builder;
drv.args = readStrings<Strings>(in); drv.args = readStrings<Strings>(in);
@ -796,7 +796,7 @@ void writeDerivation(Sink & out, const Store & store, const BasicDerivation & dr
}, },
}, i.second.raw()); }, i.second.raw());
} }
worker_proto::write(store, out, drv.inputSrcs); workerProtoWrite(store, out, drv.inputSrcs);
out << drv.platform << drv.builder << drv.args; out << drv.platform << drv.builder << drv.args;
out << drv.env.size(); out << drv.env.size();
for (auto & i : drv.env) for (auto & i : drv.env)

4
src/libstore/export-import.cc
View file

@ -45,7 +45,7 @@ void Store::exportPath(const StorePath & path, Sink & sink)
teeSink teeSink
<< exportMagic << exportMagic
<< printStorePath(path); << printStorePath(path);
worker_proto::write(*this, teeSink, info->references); workerProtoWrite(*this, teeSink, info->references);
teeSink teeSink
<< (info->deriver ? printStorePath(*info->deriver) : "") << (info->deriver ? printStorePath(*info->deriver) : "")
<< 0; << 0;
@ -73,7 +73,7 @@ StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
//Activity act(*logger, lvlInfo, "importing path '%s'", info.path); //Activity act(*logger, lvlInfo, "importing path '%s'", info.path);
auto references = worker_proto::read(*this, source, Phantom<StorePathSet> {}); auto references = WorkerProto<StorePathSet>::read(*this, source);
auto deriver = readString(source); auto deriver = readString(source);
auto narHash = hashString(htSHA256, saved.s); auto narHash = hashString(htSHA256, saved.s);

16
src/libstore/legacy-ssh-store.cc
View file

@ -146,7 +146,7 @@ struct LegacySSHStore : public virtual LegacySSHStoreConfig, public virtual Stor
auto deriver = readString(conn->from); auto deriver = readString(conn->from);
if (deriver != "") if (deriver != "")
info->deriver = parseStorePath(deriver); info->deriver = parseStorePath(deriver);
info->references = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); info->references = WorkerProto<StorePathSet>::read(*this, conn->from);
readLongLong(conn->from); // download size readLongLong(conn->from); // download size
info->narSize = readLongLong(conn->from); info->narSize = readLongLong(conn->from);
@ -180,7 +180,7 @@ struct LegacySSHStore : public virtual LegacySSHStoreConfig, public virtual Stor
<< printStorePath(info.path) << printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "") << (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false); << info.narHash.to_string(Base16, false);
worker_proto::write(*this, conn->to, info.references); workerProtoWrite(*this, conn->to, info.references);
conn->to conn->to
<< info.registrationTime << info.registrationTime
<< info.narSize << info.narSize
@ -209,7 +209,7 @@ struct LegacySSHStore : public virtual LegacySSHStoreConfig, public virtual Stor
conn->to conn->to
<< exportMagic << exportMagic
<< printStorePath(info.path); << printStorePath(info.path);
worker_proto::write(*this, conn->to, info.references); workerProtoWrite(*this, conn->to, info.references);
conn->to conn->to
<< (info.deriver ? printStorePath(*info.deriver) : "") << (info.deriver ? printStorePath(*info.deriver) : "")
<< 0 << 0
@ -294,7 +294,7 @@ public:
if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 3) if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 3)
conn->from >> status.timesBuilt >> status.isNonDeterministic >> status.startTime >> status.stopTime; conn->from >> status.timesBuilt >> status.isNonDeterministic >> status.startTime >> status.stopTime;
if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 6) { if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 6) {
auto builtOutputs = worker_proto::read(*this, conn->from, Phantom<DrvOutputs> {}); auto builtOutputs = WorkerProto<DrvOutputs>::read(*this, conn->from);
for (auto && [output, realisation] : builtOutputs) for (auto && [output, realisation] : builtOutputs)
status.builtOutputs.insert_or_assign( status.builtOutputs.insert_or_assign(
std::move(output.outputName), std::move(output.outputName),
@ -358,10 +358,10 @@ public:
conn->to conn->to
<< cmdQueryClosure << cmdQueryClosure
<< includeOutputs; << includeOutputs;
worker_proto::write(*this, conn->to, paths); workerProtoWrite(*this, conn->to, paths);
conn->to.flush(); conn->to.flush();
for (auto & i : worker_proto::read(*this, conn->from, Phantom<StorePathSet> {})) for (auto & i : WorkerProto<StorePathSet>::read(*this, conn->from))
out.insert(i); out.insert(i);
} }
@ -374,10 +374,10 @@ public:
<< cmdQueryValidPaths << cmdQueryValidPaths
<< false // lock << false // lock
<< maybeSubstitute; << maybeSubstitute;
worker_proto::write(*this, conn->to, paths); workerProtoWrite(*this, conn->to, paths);
conn->to.flush(); conn->to.flush();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
void connect() override void connect() override

4
src/libstore/path-info.cc
View file

@ -131,7 +131,7 @@ ValidPathInfo ValidPathInfo::read(Source & source, const Store & store, unsigned
auto narHash = Hash::parseAny(readString(source), htSHA256); auto narHash = Hash::parseAny(readString(source), htSHA256);
ValidPathInfo info(path, narHash); ValidPathInfo info(path, narHash);
if (deriver != "") info.deriver = store.parseStorePath(deriver); if (deriver != "") info.deriver = store.parseStorePath(deriver);
info.references = worker_proto::read(store, source, Phantom<StorePathSet> {}); info.references = WorkerProto<StorePathSet>::read(store, source);
source >> info.registrationTime >> info.narSize; source >> info.registrationTime >> info.narSize;
if (format >= 16) { if (format >= 16) {
source >> info.ultimate; source >> info.ultimate;
@ -152,7 +152,7 @@ void ValidPathInfo::write(
sink << store.printStorePath(path); sink << store.printStorePath(path);
sink << (deriver ? store.printStorePath(*deriver) : "") sink << (deriver ? store.printStorePath(*deriver) : "")
<< narHash.to_string(Base16, false); << narHash.to_string(Base16, false);
worker_proto::write(store, sink, references); workerProtoWrite(store, sink, references);
sink << registrationTime << narSize; sink << registrationTime << narSize;
if (format >= 16) { if (format >= 16) {
sink << ultimate sink << ultimate

62
src/libstore/remote-store.cc
View file

@ -100,7 +100,7 @@ void RemoteStore::initConnection(Connection & conn)
} }
if (GET_PROTOCOL_MINOR(conn.daemonVersion) >= 35) { if (GET_PROTOCOL_MINOR(conn.daemonVersion) >= 35) {
conn.remoteTrustsUs = worker_proto::read(*this, conn.from, Phantom<std::optional<TrustedFlag>> {}); conn.remoteTrustsUs = WorkerProto<std::optional<TrustedFlag>>::read(*this, conn.from);
} else { } else {
// We don't know the answer; protocol to old. // We don't know the answer; protocol to old.
conn.remoteTrustsUs = std::nullopt; conn.remoteTrustsUs = std::nullopt;
@ -227,12 +227,12 @@ StorePathSet RemoteStore::queryValidPaths(const StorePathSet & paths, Substitute
return res; return res;
} else { } else {
conn->to << wopQueryValidPaths; conn->to << wopQueryValidPaths;
worker_proto::write(*this, conn->to, paths); workerProtoWrite(*this, conn->to, paths);
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 27) { if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 27) {
conn->to << (settings.buildersUseSubstitutes ? 1 : 0); conn->to << (settings.buildersUseSubstitutes ? 1 : 0);
} }
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
} }
@ -242,7 +242,7 @@ StorePathSet RemoteStore::queryAllValidPaths()
auto conn(getConnection()); auto conn(getConnection());
conn->to << wopQueryAllValidPaths; conn->to << wopQueryAllValidPaths;
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
@ -259,9 +259,9 @@ StorePathSet RemoteStore::querySubstitutablePaths(const StorePathSet & paths)
return res; return res;
} else { } else {
conn->to << wopQuerySubstitutablePaths; conn->to << wopQuerySubstitutablePaths;
worker_proto::write(*this, conn->to, paths); workerProtoWrite(*this, conn->to, paths);
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
} }
@ -283,7 +283,7 @@ void RemoteStore::querySubstitutablePathInfos(const StorePathCAMap & pathsMap, S
auto deriver = readString(conn->from); auto deriver = readString(conn->from);
if (deriver != "") if (deriver != "")
info.deriver = parseStorePath(deriver); info.deriver = parseStorePath(deriver);
info.references = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); info.references = WorkerProto<StorePathSet>::read(*this, conn->from);
info.downloadSize = readLongLong(conn->from); info.downloadSize = readLongLong(conn->from);
info.narSize = readLongLong(conn->from); info.narSize = readLongLong(conn->from);
infos.insert_or_assign(i.first, std::move(info)); infos.insert_or_assign(i.first, std::move(info));
@ -296,9 +296,9 @@ void RemoteStore::querySubstitutablePathInfos(const StorePathCAMap & pathsMap, S
StorePathSet paths; StorePathSet paths;
for (auto & path : pathsMap) for (auto & path : pathsMap)
paths.insert(path.first); paths.insert(path.first);
worker_proto::write(*this, conn->to, paths); workerProtoWrite(*this, conn->to, paths);
} else } else
worker_proto::write(*this, conn->to, pathsMap); workerProtoWrite(*this, conn->to, pathsMap);
conn.processStderr(); conn.processStderr();
size_t count = readNum<size_t>(conn->from); size_t count = readNum<size_t>(conn->from);
for (size_t n = 0; n < count; n++) { for (size_t n = 0; n < count; n++) {
@ -306,7 +306,7 @@ void RemoteStore::querySubstitutablePathInfos(const StorePathCAMap & pathsMap, S
auto deriver = readString(conn->from); auto deriver = readString(conn->from);
if (deriver != "") if (deriver != "")
info.deriver = parseStorePath(deriver); info.deriver = parseStorePath(deriver);
info.references = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); info.references = WorkerProto<StorePathSet>::read(*this, conn->from);
info.downloadSize = readLongLong(conn->from); info.downloadSize = readLongLong(conn->from);
info.narSize = readLongLong(conn->from); info.narSize = readLongLong(conn->from);
} }
@ -349,7 +349,7 @@ void RemoteStore::queryReferrers(const StorePath & path,
auto conn(getConnection()); auto conn(getConnection());
conn->to << wopQueryReferrers << printStorePath(path); conn->to << wopQueryReferrers << printStorePath(path);
conn.processStderr(); conn.processStderr();
for (auto & i : worker_proto::read(*this, conn->from, Phantom<StorePathSet> {})) for (auto & i : WorkerProto<StorePathSet>::read(*this, conn->from))
referrers.insert(i); referrers.insert(i);
} }
@ -359,7 +359,7 @@ StorePathSet RemoteStore::queryValidDerivers(const StorePath & path)
auto conn(getConnection()); auto conn(getConnection());
conn->to << wopQueryValidDerivers << printStorePath(path); conn->to << wopQueryValidDerivers << printStorePath(path);
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
@ -371,7 +371,7 @@ StorePathSet RemoteStore::queryDerivationOutputs(const StorePath & path)
auto conn(getConnection()); auto conn(getConnection());
conn->to << wopQueryDerivationOutputs << printStorePath(path); conn->to << wopQueryDerivationOutputs << printStorePath(path);
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); return WorkerProto<StorePathSet>::read(*this, conn->from);
} }
@ -381,7 +381,7 @@ std::map<std::string, std::optional<StorePath>> RemoteStore::queryPartialDerivat
auto conn(getConnection()); auto conn(getConnection());
conn->to << wopQueryDerivationOutputMap << printStorePath(path); conn->to << wopQueryDerivationOutputMap << printStorePath(path);
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<std::map<std::string, std::optional<StorePath>>> {}); return WorkerProto<std::map<std::string, std::optional<StorePath>>>::read(*this, conn->from);
} else { } else {
// Fallback for old daemon versions. // Fallback for old daemon versions.
// For floating-CA derivations (and their co-dependencies) this is an // For floating-CA derivations (and their co-dependencies) this is an
@ -427,7 +427,7 @@ ref<const ValidPathInfo> RemoteStore::addCAToStore(
<< wopAddToStore << wopAddToStore
<< name << name
<< caMethod.render(hashType); << caMethod.render(hashType);
worker_proto::write(*this, conn->to, references); workerProtoWrite(*this, conn->to, references);
conn->to << repair; conn->to << repair;
// The dump source may invoke the store, so we need to make some room. // The dump source may invoke the store, so we need to make some room.
@ -452,7 +452,7 @@ ref<const ValidPathInfo> RemoteStore::addCAToStore(
name, printHashType(hashType)); name, printHashType(hashType));
std::string s = dump.drain(); std::string s = dump.drain();
conn->to << wopAddTextToStore << name << s; conn->to << wopAddTextToStore << name << s;
worker_proto::write(*this, conn->to, references); workerProtoWrite(*this, conn->to, references);
conn.processStderr(); conn.processStderr();
}, },
[&](const FileIngestionMethod & fim) -> void { [&](const FileIngestionMethod & fim) -> void {
@ -518,7 +518,7 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
sink sink
<< exportMagic << exportMagic
<< printStorePath(info.path); << printStorePath(info.path);
worker_proto::write(*this, sink, info.references); workerProtoWrite(*this, sink, info.references);
sink sink
<< (info.deriver ? printStorePath(*info.deriver) : "") << (info.deriver ? printStorePath(*info.deriver) : "")
<< 0 // == no legacy signature << 0 // == no legacy signature
@ -528,7 +528,7 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
conn.processStderr(0, source2.get()); conn.processStderr(0, source2.get());
auto importedPaths = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); auto importedPaths = WorkerProto<StorePathSet>::read(*this, conn->from);
assert(importedPaths.size() <= 1); assert(importedPaths.size() <= 1);
} }
@ -537,7 +537,7 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
<< printStorePath(info.path) << printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "") << (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false); << info.narHash.to_string(Base16, false);
worker_proto::write(*this, conn->to, info.references); workerProtoWrite(*this, conn->to, info.references);
conn->to << info.registrationTime << info.narSize conn->to << info.registrationTime << info.narSize
<< info.ultimate << info.sigs << renderContentAddress(info.ca) << info.ultimate << info.sigs << renderContentAddress(info.ca)
<< repair << !checkSigs; << repair << !checkSigs;
@ -610,7 +610,7 @@ void RemoteStore::registerDrvOutput(const Realisation & info)
conn->to << info.id.to_string(); conn->to << info.id.to_string();
conn->to << std::string(info.outPath.to_string()); conn->to << std::string(info.outPath.to_string());
} else { } else {
worker_proto::write(*this, conn->to, info); workerProtoWrite(*this, conn->to, info);
} }
conn.processStderr(); conn.processStderr();
} }
@ -632,14 +632,14 @@ void RemoteStore::queryRealisationUncached(const DrvOutput & id,
auto real = [&]() -> std::shared_ptr<const Realisation> { auto real = [&]() -> std::shared_ptr<const Realisation> {
if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) { if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) {
auto outPaths = worker_proto::read( auto outPaths = WorkerProto<std::set<StorePath>>::read(
*this, conn->from, Phantom<std::set<StorePath>> {}); *this, conn->from);
if (outPaths.empty()) if (outPaths.empty())
return nullptr; return nullptr;
return std::make_shared<const Realisation>(Realisation { .id = id, .outPath = *outPaths.begin() }); return std::make_shared<const Realisation>(Realisation { .id = id, .outPath = *outPaths.begin() });
} else { } else {
auto realisations = worker_proto::read( auto realisations = WorkerProto<std::set<Realisation>>::read(
*this, conn->from, Phantom<std::set<Realisation>> {}); *this, conn->from);
if (realisations.empty()) if (realisations.empty())
return nullptr; return nullptr;
return std::make_shared<const Realisation>(*realisations.begin()); return std::make_shared<const Realisation>(*realisations.begin());
@ -653,7 +653,7 @@ void RemoteStore::queryRealisationUncached(const DrvOutput & id,
static void writeDerivedPaths(RemoteStore & store, ConnectionHandle & conn, const std::vector<DerivedPath> & reqs) static void writeDerivedPaths(RemoteStore & store, ConnectionHandle & conn, const std::vector<DerivedPath> & reqs)
{ {
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 30) { if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 30) {
worker_proto::write(store, conn->to, reqs); workerProtoWrite(store, conn->to, reqs);
} else { } else {
Strings ss; Strings ss;
for (auto & p : reqs) { for (auto & p : reqs) {
@ -723,7 +723,7 @@ std::vector<KeyedBuildResult> RemoteStore::buildPathsWithResults(
writeDerivedPaths(*this, conn, paths); writeDerivedPaths(*this, conn, paths);
conn->to << buildMode; conn->to << buildMode;
conn.processStderr(); conn.processStderr();
return worker_proto::read(*this, conn->from, Phantom<std::vector<KeyedBuildResult>> {}); return WorkerProto<std::vector<KeyedBuildResult>>::read(*this, conn->from);
} else { } else {
// Avoid deadlock. // Avoid deadlock.
conn_.reset(); conn_.reset();
@ -806,7 +806,7 @@ BuildResult RemoteStore::buildDerivation(const StorePath & drvPath, const BasicD
conn->from >> res.timesBuilt >> res.isNonDeterministic >> res.startTime >> res.stopTime; conn->from >> res.timesBuilt >> res.isNonDeterministic >> res.startTime >> res.stopTime;
} }
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 28) { if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 28) {
auto builtOutputs = worker_proto::read(*this, conn->from, Phantom<DrvOutputs> {}); auto builtOutputs = WorkerProto<DrvOutputs>::read(*this, conn->from);
for (auto && [output, realisation] : builtOutputs) for (auto && [output, realisation] : builtOutputs)
res.builtOutputs.insert_or_assign( res.builtOutputs.insert_or_assign(
std::move(output.outputName), std::move(output.outputName),
@ -865,7 +865,7 @@ void RemoteStore::collectGarbage(const GCOptions & options, GCResults & results)
conn->to conn->to
<< wopCollectGarbage << options.action; << wopCollectGarbage << options.action;
worker_proto::write(*this, conn->to, options.pathsToDelete); workerProtoWrite(*this, conn->to, options.pathsToDelete);
conn->to << options.ignoreLiveness conn->to << options.ignoreLiveness
<< options.maxFreed << options.maxFreed
/* removed options */ /* removed options */
@ -924,9 +924,9 @@ void RemoteStore::queryMissing(const std::vector<DerivedPath> & targets,
conn->to << wopQueryMissing; conn->to << wopQueryMissing;
writeDerivedPaths(*this, conn, targets); writeDerivedPaths(*this, conn, targets);
conn.processStderr(); conn.processStderr();
willBuild = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); willBuild = WorkerProto<StorePathSet>::read(*this, conn->from);
willSubstitute = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); willSubstitute = WorkerProto<StorePathSet>::read(*this, conn->from);
unknown = worker_proto::read(*this, conn->from, Phantom<StorePathSet> {}); unknown = WorkerProto<StorePathSet>::read(*this, conn->from);
conn->from >> downloadSize >> narSize; conn->from >> downloadSize >> narSize;
return; return;
} }

58
src/libstore/worker-protocol.cc
View file

@ -9,31 +9,31 @@
#include <nlohmann/json.hpp> #include <nlohmann/json.hpp>
namespace nix::worker_proto { namespace nix {
std::string read(const Store & store, Source & from, Phantom<std::string> _) std::string WorkerProto<std::string>::read(const Store & store, Source & from)
{ {
return readString(from); return readString(from);
} }
void write(const Store & store, Sink & out, const std::string & str) void WorkerProto<std::string>::write(const Store & store, Sink & out, const std::string & str)
{ {
out << str; out << str;
} }
StorePath read(const Store & store, Source & from, Phantom<StorePath> _) StorePath WorkerProto<StorePath>::read(const Store & store, Source & from)
{ {
return store.parseStorePath(readString(from)); return store.parseStorePath(readString(from));
} }
void write(const Store & store, Sink & out, const StorePath & storePath) void WorkerProto<StorePath>::write(const Store & store, Sink & out, const StorePath & storePath)
{ {
out << store.printStorePath(storePath); out << store.printStorePath(storePath);
} }
std::optional<TrustedFlag> read(const Store & store, Source & from, Phantom<std::optional<TrustedFlag>> _) std::optional<TrustedFlag> WorkerProto<std::optional<TrustedFlag>>::read(const Store & store, Source & from)
{ {
auto temp = readNum<uint8_t>(from); auto temp = readNum<uint8_t>(from);
switch (temp) { switch (temp) {
@ -48,7 +48,7 @@ std::optional<TrustedFlag> read(const Store & store, Source & from, Phantom<std:
} }
} }
void write(const Store & store, Sink & out, const std::optional<TrustedFlag> & optTrusted) void WorkerProto<std::optional<TrustedFlag>>::write(const Store & store, Sink & out, const std::optional<TrustedFlag> & optTrusted)
{ {
if (!optTrusted) if (!optTrusted)
out << (uint8_t)0; out << (uint8_t)0;
@ -67,30 +67,30 @@ void write(const Store & store, Sink & out, const std::optional<TrustedFlag> & o
} }
ContentAddress read(const Store & store, Source & from, Phantom<ContentAddress> _) ContentAddress WorkerProto<ContentAddress>::read(const Store & store, Source & from)
{ {
return ContentAddress::parse(readString(from)); return ContentAddress::parse(readString(from));
} }
void write(const Store & store, Sink & out, const ContentAddress & ca) void WorkerProto<ContentAddress>::write(const Store & store, Sink & out, const ContentAddress & ca)
{ {
out << renderContentAddress(ca); out << renderContentAddress(ca);
} }
DerivedPath read(const Store & store, Source & from, Phantom<DerivedPath> _) DerivedPath WorkerProto<DerivedPath>::read(const Store & store, Source & from)
{ {
auto s = readString(from); auto s = readString(from);
return DerivedPath::parseLegacy(store, s); return DerivedPath::parseLegacy(store, s);
} }
void write(const Store & store, Sink & out, const DerivedPath & req) void WorkerProto<DerivedPath>::write(const Store & store, Sink & out, const DerivedPath & req)
{ {
out << req.to_string_legacy(store); out << req.to_string_legacy(store);
} }
Realisation read(const Store & store, Source & from, Phantom<Realisation> _) Realisation WorkerProto<Realisation>::read(const Store & store, Source & from)
{ {
std::string rawInput = readString(from); std::string rawInput = readString(from);
return Realisation::fromJSON( return Realisation::fromJSON(
@ -99,41 +99,41 @@ Realisation read(const Store & store, Source & from, Phantom<Realisation> _)
); );
} }
void write(const Store & store, Sink & out, const Realisation & realisation) void WorkerProto<Realisation>::write(const Store & store, Sink & out, const Realisation & realisation)
{ {
out << realisation.toJSON().dump(); out << realisation.toJSON().dump();
} }
DrvOutput read(const Store & store, Source & from, Phantom<DrvOutput> _) DrvOutput WorkerProto<DrvOutput>::read(const Store & store, Source & from)
{ {
return DrvOutput::parse(readString(from)); return DrvOutput::parse(readString(from));
} }
void write(const Store & store, Sink & out, const DrvOutput & drvOutput) void WorkerProto<DrvOutput>::write(const Store & store, Sink & out, const DrvOutput & drvOutput)
{ {
out << drvOutput.to_string(); out << drvOutput.to_string();
} }
KeyedBuildResult read(const Store & store, Source & from, Phantom<KeyedBuildResult> _) KeyedBuildResult WorkerProto<KeyedBuildResult>::read(const Store & store, Source & from)
{ {
auto path = read(store, from, Phantom<DerivedPath> {}); auto path = WorkerProto<DerivedPath>::read(store, from);
auto br = read(store, from, Phantom<BuildResult> {}); auto br = WorkerProto<BuildResult>::read(store, from);
return KeyedBuildResult { return KeyedBuildResult {
std::move(br), std::move(br),
/* .path = */ std::move(path), /* .path = */ std::move(path),
}; };
} }
void write(const Store & store, Sink & to, const KeyedBuildResult & res) void WorkerProto<KeyedBuildResult>::write(const Store & store, Sink & to, const KeyedBuildResult & res)
{ {
write(store, to, res.path); workerProtoWrite(store, to, res.path);
write(store, to, static_cast<const BuildResult &>(res)); workerProtoWrite(store, to, static_cast<const BuildResult &>(res));
} }
BuildResult read(const Store & store, Source & from, Phantom<BuildResult> _) BuildResult WorkerProto<BuildResult>::read(const Store & store, Source & from)
{ {
BuildResult res; BuildResult res;
res.status = (BuildResult::Status) readInt(from); res.status = (BuildResult::Status) readInt(from);
@ -143,7 +143,7 @@ BuildResult read(const Store & store, Source & from, Phantom<BuildResult> _)
>> res.isNonDeterministic >> res.isNonDeterministic
>> res.startTime >> res.startTime
>> res.stopTime; >> res.stopTime;
auto builtOutputs = read(store, from, Phantom<DrvOutputs> {}); auto builtOutputs = WorkerProto<DrvOutputs>::read(store, from);
for (auto && [output, realisation] : builtOutputs) for (auto && [output, realisation] : builtOutputs)
res.builtOutputs.insert_or_assign( res.builtOutputs.insert_or_assign(
std::move(output.outputName), std::move(output.outputName),
@ -151,7 +151,7 @@ BuildResult read(const Store & store, Source & from, Phantom<BuildResult> _)
return res; return res;
} }
void write(const Store & store, Sink & to, const BuildResult & res) void WorkerProto<BuildResult>::write(const Store & store, Sink & to, const BuildResult & res)
{ {
to to
<< res.status << res.status
@ -163,28 +163,28 @@ void write(const Store & store, Sink & to, const BuildResult & res)
DrvOutputs builtOutputs; DrvOutputs builtOutputs;
for (auto & [output, realisation] : res.builtOutputs) for (auto & [output, realisation] : res.builtOutputs)
builtOutputs.insert_or_assign(realisation.id, realisation); builtOutputs.insert_or_assign(realisation.id, realisation);
write(store, to, builtOutputs); workerProtoWrite(store, to, builtOutputs);
} }
std::optional<StorePath> read(const Store & store, Source & from, Phantom<std::optional<StorePath>> _) std::optional<StorePath> WorkerProto<std::optional<StorePath>>::read(const Store & store, Source & from)
{ {
auto s = readString(from); auto s = readString(from);
return s == "" ? std::optional<StorePath> {} : store.parseStorePath(s); return s == "" ? std::optional<StorePath> {} : store.parseStorePath(s);
} }
void write(const Store & store, Sink & out, const std::optional<StorePath> & storePathOpt) void WorkerProto<std::optional<StorePath>>::write(const Store & store, Sink & out, const std::optional<StorePath> & storePathOpt)
{ {
out << (storePathOpt ? store.printStorePath(*storePathOpt) : ""); out << (storePathOpt ? store.printStorePath(*storePathOpt) : "");
} }
std::optional<ContentAddress> read(const Store & store, Source & from, Phantom<std::optional<ContentAddress>> _) std::optional<ContentAddress> WorkerProto<std::optional<ContentAddress>>::read(const Store & store, Source & from)
{ {
return ContentAddress::parseOpt(readString(from)); return ContentAddress::parseOpt(readString(from));
} }
void write(const Store & store, Sink & out, const std::optional<ContentAddress> & caOpt) void WorkerProto<std::optional<ContentAddress>>::write(const Store & store, Sink & out, const std::optional<ContentAddress> & caOpt)
{ {
out << (caOpt ? renderContentAddress(*caOpt) : ""); out << (caOpt ? renderContentAddress(*caOpt) : "");
} }

113
src/libstore/worker-protocol.hh
View file

@ -80,40 +80,71 @@ class Store;
struct Source; struct Source;
/** /**
* Used to guide overloading * Data type for canonical pairs of serializers for the worker protocol.
* *
* See https://en.cppreference.com/w/cpp/language/adl for the broader * See https://en.cppreference.com/w/cpp/language/adl for the broader
* concept of what is going on here. * concept of what is going on here.
*/ */
template<typename T> template<typename T>
struct Phantom {}; struct WorkerProto {
static T read(const Store & store, Source & from);
static void write(const Store & store, Sink & out, const T & t);
};
/**
* Wrapper function around `WorkerProto<T>::write` that allows us to
* infer the type instead of having to write it down explicitly.
*/
template<typename T>
void workerProtoWrite(const Store & store, Sink & out, const T & t)
{
WorkerProto<T>::write(store, out, t);
}
namespace worker_proto { /**
/* FIXME maybe move more stuff inside here */ * Declare a canonical serializer pair for the worker protocol.
*
* We specialize the struct merely to indicate that we are implementing
* the function for the given type.
*
* Some sort of `template<...>` must be used with the caller for this to
* be legal specialization syntax. See below for what that looks like in
* practice.
*/
#define MAKE_WORKER_PROTO(T) \
struct WorkerProto< T > { \
static T read(const Store & store, Source & from); \
static void write(const Store & store, Sink & out, const T & t); \
};
#define MAKE_WORKER_PROTO(TEMPLATE, T) \ template<>
TEMPLATE T read(const Store & store, Source & from, Phantom< T > _); \ MAKE_WORKER_PROTO(std::string);
TEMPLATE void write(const Store & store, Sink & out, const T & str) template<>
MAKE_WORKER_PROTO(StorePath);
template<>
MAKE_WORKER_PROTO(ContentAddress);
template<>
MAKE_WORKER_PROTO(DerivedPath);
template<>
MAKE_WORKER_PROTO(Realisation);
template<>
MAKE_WORKER_PROTO(DrvOutput);
template<>
MAKE_WORKER_PROTO(BuildResult);
template<>
MAKE_WORKER_PROTO(KeyedBuildResult);
template<>
MAKE_WORKER_PROTO(std::optional<TrustedFlag>);
MAKE_WORKER_PROTO(, std::string); template<typename T>
MAKE_WORKER_PROTO(, StorePath); MAKE_WORKER_PROTO(std::vector<T>);
MAKE_WORKER_PROTO(, ContentAddress); template<typename T>
MAKE_WORKER_PROTO(, DerivedPath); MAKE_WORKER_PROTO(std::set<T>);
MAKE_WORKER_PROTO(, Realisation);
MAKE_WORKER_PROTO(, DrvOutput);
MAKE_WORKER_PROTO(, BuildResult);
MAKE_WORKER_PROTO(, KeyedBuildResult);
MAKE_WORKER_PROTO(, std::optional<TrustedFlag>);
MAKE_WORKER_PROTO(template<typename T>, std::vector<T>); template<typename K, typename V>
MAKE_WORKER_PROTO(template<typename T>, std::set<T>); #define X_ std::map<K, V>
MAKE_WORKER_PROTO(X_);
#define X_ template<typename K, typename V>
#define Y_ std::map<K, V>
MAKE_WORKER_PROTO(X_, Y_);
#undef X_ #undef X_
#undef Y_
/** /**
* These use the empty string for the null case, relying on the fact * These use the empty string for the null case, relying on the fact
@ -129,72 +160,72 @@ MAKE_WORKER_PROTO(X_, Y_);
* worker protocol harder to implement in other languages where such * worker protocol harder to implement in other languages where such
* specializations may not be allowed. * specializations may not be allowed.
*/ */
MAKE_WORKER_PROTO(, std::optional<StorePath>); template<>
MAKE_WORKER_PROTO(, std::optional<ContentAddress>); MAKE_WORKER_PROTO(std::optional<StorePath>);
template<>
MAKE_WORKER_PROTO(std::optional<ContentAddress>);
template<typename T> template<typename T>
std::vector<T> read(const Store & store, Source & from, Phantom<std::vector<T>> _) std::vector<T> WorkerProto<std::vector<T>>::read(const Store & store, Source & from)
{ {
std::vector<T> resSet; std::vector<T> resSet;
auto size = readNum<size_t>(from); auto size = readNum<size_t>(from);
while (size--) { while (size--) {
resSet.push_back(read(store, from, Phantom<T> {})); resSet.push_back(WorkerProto<T>::read(store, from));
} }
return resSet; return resSet;
} }
template<typename T> template<typename T>
void write(const Store & store, Sink & out, const std::vector<T> & resSet) void WorkerProto<std::vector<T>>::write(const Store & store, Sink & out, const std::vector<T> & resSet)
{ {
out << resSet.size(); out << resSet.size();
for (auto & key : resSet) { for (auto & key : resSet) {
write(store, out, key); WorkerProto<T>::write(store, out, key);
} }
} }
template<typename T> template<typename T>
std::set<T> read(const Store & store, Source & from, Phantom<std::set<T>> _) std::set<T> WorkerProto<std::set<T>>::read(const Store & store, Source & from)
{ {
std::set<T> resSet; std::set<T> resSet;
auto size = readNum<size_t>(from); auto size = readNum<size_t>(from);
while (size--) { while (size--) {
resSet.insert(read(store, from, Phantom<T> {})); resSet.insert(WorkerProto<T>::read(store, from));
} }
return resSet; return resSet;
} }
template<typename T> template<typename T>
void write(const Store & store, Sink & out, const std::set<T> & resSet) void WorkerProto<std::set<T>>::write(const Store & store, Sink & out, const std::set<T> & resSet)
{ {
out << resSet.size(); out << resSet.size();
for (auto & key : resSet) { for (auto & key : resSet) {
write(store, out, key); WorkerProto<T>::write(store, out, key);
} }
} }
template<typename K, typename V> template<typename K, typename V>
std::map<K, V> read(const Store & store, Source & from, Phantom<std::map<K, V>> _) std::map<K, V> WorkerProto<std::map<K, V>>::read(const Store & store, Source & from)
{ {
std::map<K, V> resMap; std::map<K, V> resMap;
auto size = readNum<size_t>(from); auto size = readNum<size_t>(from);
while (size--) { while (size--) {
auto k = read(store, from, Phantom<K> {}); auto k = WorkerProto<K>::read(store, from);
auto v = read(store, from, Phantom<V> {}); auto v = WorkerProto<V>::read(store, from);
resMap.insert_or_assign(std::move(k), std::move(v)); resMap.insert_or_assign(std::move(k), std::move(v));
} }
return resMap; return resMap;
} }
template<typename K, typename V> template<typename K, typename V>
void write(const Store & store, Sink & out, const std::map<K, V> & resMap) void WorkerProto<std::map<K, V>>::write(const Store & store, Sink & out, const std::map<K, V> & resMap)
{ {
out << resMap.size(); out << resMap.size();
for (auto & i : resMap) { for (auto & i : resMap) {
write(store, out, i.first); WorkerProto<K>::write(store, out, i.first);
write(store, out, i.second); WorkerProto<V>::write(store, out, i.second);
} }
} }
} }
}

18
src/nix-store/nix-store.cc
View file

@ -849,7 +849,7 @@ static void opServe(Strings opFlags, Strings opArgs)
case cmdQueryValidPaths: { case cmdQueryValidPaths: {
bool lock = readInt(in); bool lock = readInt(in);
bool substitute = readInt(in); bool substitute = readInt(in);
auto paths = worker_proto::read(*store, in, Phantom<StorePathSet> {}); auto paths = WorkerProto<StorePathSet>::read(*store, in);
if (lock && writeAllowed) if (lock && writeAllowed)
for (auto & path : paths) for (auto & path : paths)
store->addTempRoot(path); store->addTempRoot(path);
@ -858,19 +858,19 @@ static void opServe(Strings opFlags, Strings opArgs)
store->substitutePaths(paths); store->substitutePaths(paths);
} }
worker_proto::write(*store, out, store->queryValidPaths(paths)); workerProtoWrite(*store, out, store->queryValidPaths(paths));
break; break;
} }
case cmdQueryPathInfos: { case cmdQueryPathInfos: {
auto paths = worker_proto::read(*store, in, Phantom<StorePathSet> {}); auto paths = WorkerProto<StorePathSet>::read(*store, in);
// !!! Maybe we want a queryPathInfos? // !!! Maybe we want a queryPathInfos?
for (auto & i : paths) { for (auto & i : paths) {
try { try {
auto info = store->queryPathInfo(i); auto info = store->queryPathInfo(i);
out << store->printStorePath(info->path) out << store->printStorePath(info->path)
<< (info->deriver ? store->printStorePath(*info->deriver) : ""); << (info->deriver ? store->printStorePath(*info->deriver) : "");
worker_proto::write(*store, out, info->references); workerProtoWrite(*store, out, info->references);
// !!! Maybe we want compression? // !!! Maybe we want compression?
out << info->narSize // downloadSize out << info->narSize // downloadSize
<< info->narSize; << info->narSize;
@ -898,7 +898,7 @@ static void opServe(Strings opFlags, Strings opArgs)
case cmdExportPaths: { case cmdExportPaths: {
readInt(in); // obsolete readInt(in); // obsolete
store->exportPaths(worker_proto::read(*store, in, Phantom<StorePathSet> {}), out); store->exportPaths(WorkerProto<StorePathSet>::read(*store, in), out);
break; break;
} }
@ -944,7 +944,7 @@ static void opServe(Strings opFlags, Strings opArgs)
DrvOutputs builtOutputs; DrvOutputs builtOutputs;
for (auto & [output, realisation] : status.builtOutputs) for (auto & [output, realisation] : status.builtOutputs)
builtOutputs.insert_or_assign(realisation.id, realisation); builtOutputs.insert_or_assign(realisation.id, realisation);
worker_proto::write(*store, out, builtOutputs); workerProtoWrite(*store, out, builtOutputs);
} }
break; break;
@ -953,9 +953,9 @@ static void opServe(Strings opFlags, Strings opArgs)
case cmdQueryClosure: { case cmdQueryClosure: {
bool includeOutputs = readInt(in); bool includeOutputs = readInt(in);
StorePathSet closure; StorePathSet closure;
store->computeFSClosure(worker_proto::read(*store, in, Phantom<StorePathSet> {}), store->computeFSClosure(WorkerProto<StorePathSet>::read(*store, in),
closure, false, includeOutputs); closure, false, includeOutputs);
worker_proto::write(*store, out, closure); workerProtoWrite(*store, out, closure);
break; break;
} }
@ -970,7 +970,7 @@ static void opServe(Strings opFlags, Strings opArgs)
}; };
if (deriver != "") if (deriver != "")
info.deriver = store->parseStorePath(deriver); info.deriver = store->parseStorePath(deriver);
info.references = worker_proto::read(*store, in, Phantom<StorePathSet> {}); info.references = WorkerProto<StorePathSet>::read(*store, in);
in >> info.registrationTime >> info.narSize >> info.ultimate; in >> info.registrationTime >> info.narSize >> info.ultimate;
info.sigs = readStrings<StringSet>(in); info.sigs = readStrings<StringSet>(in);
info.ca = ContentAddress::parseOpt(readString(in)); info.ca = ContentAddress::parseOpt(readString(in));