lix/src/libstore/remote-store.hh
Eelco Dolstra ccc52adfb2 Add function queryPathFromHashPart()
To implement binary caches efficiently, Hydra needs to be able to map
the hash part of a store path (e.g. "gbg...zr7") to the full store
path (e.g. "/nix/store/gbg...kzr7-subversion-1.7.5").  (The binary
cache mechanism uses hash parts as a key for looking up store paths to
ensure privacy.)  However, doing a search in the Nix store for
/nix/store/<hash>* is expensive since it requires reading the entire
directory.  queryPathFromHashPart() prevents this by doing a cheap
database lookup.
2012-07-17 18:55:39 -04:00

107 lines
2.1 KiB
C++

#ifndef __REMOTE_STORE_H
#define __REMOTE_STORE_H
#include <string>
#include "store-api.hh"
namespace nix {
class Pipe;
class Pid;
struct FdSink;
struct FdSource;
class RemoteStore : public StoreAPI
{
public:
RemoteStore();
~RemoteStore();
/* Implementations of abstract store API methods. */
bool isValidPath(const Path & path);
PathSet queryValidPaths();
ValidPathInfo queryPathInfo(const Path & path);
Hash queryPathHash(const Path & path);
void queryReferences(const Path & path, PathSet & references);
void queryReferrers(const Path & path, PathSet & referrers);
Path queryDeriver(const Path & path);
PathSet queryDerivationOutputs(const Path & path);
StringSet queryDerivationOutputNames(const Path & path);
Path queryPathFromHashPart(const string & hashPart);
bool hasSubstitutes(const Path & path);
bool querySubstitutablePathInfo(const Path & path,
SubstitutablePathInfo & info);
Path addToStore(const Path & srcPath,
bool recursive = true, HashType hashAlgo = htSHA256,
PathFilter & filter = defaultPathFilter);
Path addTextToStore(const string & name, const string & s,
const PathSet & references);
void exportPath(const Path & path, bool sign,
Sink & sink);
Paths importPaths(bool requireSignature, Source & source);
void buildPaths(const PathSet & paths);
void ensurePath(const Path & path);
void addTempRoot(const Path & path);
void addIndirectRoot(const Path & path);
void syncWithGC();
Roots findRoots();
void collectGarbage(const GCOptions & options, GCResults & results);
PathSet queryFailedPaths();
void clearFailedPaths(const PathSet & paths);
private:
AutoCloseFD fdSocket;
FdSink to;
FdSource from;
Pid child;
unsigned int daemonVersion;
bool initialised;
void openConnection(bool reserveSpace = true);
void processStderr(Sink * sink = 0, Source * source = 0);
void forkSlave();
void connectToDaemon();
void setOptions();
};
}
#endif /* !__REMOTE_STORE_H */