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#pragma once
#include <limits>
#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
{
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"};
RemoteStore(const Params & params);
/* Implementations of abstract store API methods. */
bool isValidPathUncached(const Path & path) override;
PathSet queryValidPaths(const PathSet & paths,
SubstituteFlag maybeSubstitute = NoSubstitute) override;
PathSet queryAllValidPaths() override;
void queryPathInfoUncached(const Path & path,
Callback<std::shared_ptr<ValidPathInfo>> callback) override;
void queryReferrers(const Path & path, PathSet & referrers) override;
PathSet queryValidDerivers(const Path & path) override;
PathSet queryDerivationOutputs(const Path & path) override;
StringSet queryDerivationOutputNames(const Path & path) override;
Path queryPathFromHashPart(const string & hashPart) override;
PathSet querySubstitutablePaths(const PathSet & paths) override;
void querySubstitutablePathInfos(const PathSet & paths,
SubstitutablePathInfos & infos) override;
void addToStore(const ValidPathInfo & info, Source & nar,
RepairFlag repair, CheckSigsFlag checkSigs,
std::shared_ptr<FSAccessor> accessor) override;
Path addToStore(const string & name, const Path & srcPath,
bool recursive = true, HashType hashAlgo = htSHA256,
PathFilter & filter = defaultPathFilter, RepairFlag repair = NoRepair) override;
Path addTextToStore(const string & name, const string & s,
const PathSet & references, RepairFlag repair) override;
void buildPaths(const PathSet & paths, BuildMode buildMode) override;
BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
BuildMode buildMode) override;
void ensurePath(const Path & path) override;
void addTempRoot(const Path & path) override;
void addIndirectRoot(const Path & path) override;
void syncWithGC() override;
Roots findRoots() override;
void collectGarbage(const GCOptions & options, GCResults & results) override;
void optimiseStore() override;
bool verifyStore(bool checkContents, RepairFlag repair) override;
void addSignatures(const Path & storePath, const StringSet & sigs) override;
void queryMissing(const PathSet & targets,
PathSet & willBuild, PathSet & willSubstitute, PathSet & unknown,
unsigned long long & downloadSize, unsigned long long & narSize) override;
void connect() override;
void flushBadConnections();
protected:
struct Connection
{
AutoCloseFD fd;
FdSink to;
FdSource from;
unsigned int daemonVersion;
std::chrono::time_point<std::chrono::steady_clock> startTime;
virtual ~Connection();
std::exception_ptr processStderr(Sink * sink = 0, Source * source = 0);
};
ref<Connection> openConnectionWrapper();
virtual ref<Connection> openConnection() = 0;
void initConnection(Connection & conn);
ref<Pool<Connection>> connections;
virtual void setOptions(Connection & conn);
ConnectionHandle getConnection();
friend class ConnectionHandle;
private:
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;
private:
ref<RemoteStore::Connection> openConnection() override;
std::experimental::optional<std::string> path;
};
}
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