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#pragma once
#include "libstore/nar-info.hh"
#include "libutil/ref.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, bool& wantMassQuery,
int& priority) = 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();
} // namespace nix
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