lix/src/libstore/remote-store.hh

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#pragma once
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#include <limits>
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#include <string>
#include "store-api.hh"
namespace nix {
class Pipe;
class Pid;
struct FdSink;
struct FdSource;
template<typename T> class Pool;
struct ConnectionHandle;
/* FIXME: RemoteStore is a misnomer - should be something like
DaemonStore. */
class RemoteStore : public virtual Store
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{
public:
const Setting<int> maxConnections{(Store*) this, 1,
"max-connections", "maximum number of concurrent connections to the Nix daemon"};
const Setting<unsigned int> maxConnectionAge{(Store*) this, std::numeric_limits<unsigned int>::max(),
"max-connection-age", "number of seconds to reuse a connection"};
virtual bool sameMachine() = 0;
RemoteStore(const Params & params);
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/* Implementations of abstract store API methods. */
bool isValidPathUncached(const StorePath & path) override;
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StorePathSet queryValidPaths(const StorePathSet & paths,
SubstituteFlag maybeSubstitute = NoSubstitute) override;
StorePathSet queryAllValidPaths() override;
void queryPathInfoUncached(const StorePath & path,
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept override;
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void queryReferrers(const StorePath & path, StorePathSet & referrers) override;
StorePathSet queryValidDerivers(const StorePath & path) override;
StorePathSet queryDerivationOutputs(const StorePath & path) override;
OutputPathMap queryDerivationOutputMap(const StorePath & path) override;
std::optional<StorePath> queryPathFromHashPart(const std::string & hashPart) override;
StorePathSet querySubstitutablePaths(const StorePathSet & paths) override;
void querySubstitutablePathInfos(const StorePathSet & paths,
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SubstitutablePathInfos & infos) override;
void addToStore(const ValidPathInfo & info, Source & nar,
RepairFlag repair, CheckSigsFlag checkSigs) override;
StorePath addToStore(const string & name, const Path & srcPath,
FileIngestionMethod method = FileIngestionMethod::Recursive, HashType hashAlgo = htSHA256,
PathFilter & filter = defaultPathFilter, RepairFlag repair = NoRepair) override;
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StorePath addTextToStore(const string & name, const string & s,
const StorePathSet & references, RepairFlag repair) override;
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void buildPaths(const std::vector<StorePathWithOutputs> & paths, BuildMode buildMode) override;
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BuildResult buildDerivation(const StorePath & drvPath, const BasicDerivation & drv,
BuildMode buildMode) override;
void ensurePath(const StorePath & path) override;
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void addTempRoot(const StorePath & path) override;
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void addIndirectRoot(const Path & path) override;
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void syncWithGC() override;
Roots findRoots(bool censor) override;
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void collectGarbage(const GCOptions & options, GCResults & results) override;
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void optimiseStore() override;
bool verifyStore(bool checkContents, RepairFlag repair) override;
void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
void queryMissing(const std::vector<StorePathWithOutputs> & targets,
StorePathSet & willBuild, StorePathSet & willSubstitute, StorePathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize) override;
void connect() override;
unsigned int getProtocol() override;
void flushBadConnections();
protected:
struct Connection
{
AutoCloseFD fd;
FdSink to;
FdSource from;
unsigned int daemonVersion;
std::chrono::time_point<std::chrono::steady_clock> startTime;
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virtual ~Connection();
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std::exception_ptr processStderr(Sink * sink = 0, Source * source = 0);
};
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ref<Connection> openConnectionWrapper();
virtual ref<Connection> openConnection() = 0;
void initConnection(Connection & conn);
ref<Pool<Connection>> connections;
virtual void setOptions(Connection & conn);
ConnectionHandle getConnection();
friend struct ConnectionHandle;
private:
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std::atomic_bool failed{false};
};
class UDSRemoteStore : public LocalFSStore, public RemoteStore
{
public:
UDSRemoteStore(const Params & params);
UDSRemoteStore(std::string path, const Params & params);
std::string getUri() override;
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bool sameMachine() override
{ return true; }
private:
ref<RemoteStore::Connection> openConnection() override;
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std::optional<std::string> path;
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};
}