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https://github.com/NixOS/nix
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7d14f5c331
This allows commands like "nix verify --all" or "nix path-info --all" to work on S3 caches. Unfortunately, this requires some ugly hackery: when querying the contents of the bucket, we don't want to have to read every .narinfo file. But the S3 bucket keys only include the hash part of each store path, not the name part. So as a special exception queryAllValidPaths() can now return store paths *without* the name part, and queryPathInfo() accepts such store paths (returning a ValidPathInfo object containing the full name).
30 lines
714 B
C++
30 lines
714 B
C++
#pragma once
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#include "ref.hh"
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#include "nar-info.hh"
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namespace nix {
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class NarInfoDiskCache
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{
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public:
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typedef enum { oValid, oInvalid, oUnknown } Outcome;
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virtual void createCache(const std::string & uri) = 0;
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virtual bool cacheExists(const std::string & uri) = 0;
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virtual std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
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const std::string & uri, const std::string & hashPart) = 0;
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virtual void upsertNarInfo(
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const std::string & uri, const std::string & hashPart,
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std::shared_ptr<ValidPathInfo> info) = 0;
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};
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/* Return a singleton cache object that can be used concurrently by
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multiple threads. */
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ref<NarInfoDiskCache> getNarInfoDiskCache();
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}
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