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#pragma once
#include "ref.hh"
#include "nar-info.hh"
namespace nix {
class NarInfoDiskCache
{
public:
typedef enum { oValid, oInvalid, oUnknown } Outcome;
virtual void createCache(const std::string & uri, const Path & storeDir,
bool wantMassQuery, int priority) = 0;
virtual bool cacheExists(const std::string & uri) = 0;
virtual std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
const std::string & uri, const std::string & hashPart) = 0;
virtual void upsertNarInfo(
const std::string & uri, const std::string & hashPart,
std::shared_ptr<ValidPathInfo> info) = 0;
};
/* Return a singleton cache object that can be used concurrently by
multiple threads. */
ref<NarInfoDiskCache> getNarInfoDiskCache();
}
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