forked from lix-project/lix
22afa8fb4d
Rework the `Store` hierarchy so that there's now one hierarchy for the
store configs and one for the implementations (where each implementation
extends the corresponding config). So a class hierarchy like
```
StoreConfig-------->Store
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v v
SubStoreConfig----->SubStore
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v v
SubSubStoreConfig-->SubSubStore
```
(with virtual inheritance to prevent DDD).
The advantage of this architecture is that we can now introspect the configuration of a store without having to instantiate the store itself
115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
#pragma once
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#include "crypto.hh"
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#include "store-api.hh"
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#include "pool.hh"
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#include <atomic>
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namespace nix {
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struct NarInfo;
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struct BinaryCacheStoreConfig : virtual StoreConfig
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{
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using StoreConfig::StoreConfig;
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const Setting<std::string> compression{this, "xz", "compression", "NAR compression method ('xz', 'bzip2', or 'none')"};
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const Setting<bool> writeNARListing{this, false, "write-nar-listing", "whether to write a JSON file listing the files in each NAR"};
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const Setting<bool> writeDebugInfo{this, false, "index-debug-info", "whether to index DWARF debug info files by build ID"};
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const Setting<Path> secretKeyFile{this, "", "secret-key", "path to secret key used to sign the binary cache"};
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const Setting<Path> localNarCache{this, "", "local-nar-cache", "path to a local cache of NARs"};
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const Setting<bool> parallelCompression{this, false, "parallel-compression",
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"enable multi-threading compression, available for xz only currently"};
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};
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class BinaryCacheStore : public Store, public virtual BinaryCacheStoreConfig
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{
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private:
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std::unique_ptr<SecretKey> secretKey;
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protected:
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BinaryCacheStore(const Params & params);
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public:
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virtual bool fileExists(const std::string & path) = 0;
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virtual void upsertFile(const std::string & path,
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std::shared_ptr<std::basic_iostream<char>> istream,
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const std::string & mimeType) = 0;
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void upsertFile(const std::string & path,
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std::string && data,
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const std::string & mimeType);
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/* Note: subclasses must implement at least one of the two
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following getFile() methods. */
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/* Dump the contents of the specified file to a sink. */
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virtual void getFile(const std::string & path, Sink & sink);
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/* Fetch the specified file and call the specified callback with
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the result. A subclass may implement this asynchronously. */
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virtual void getFile(const std::string & path,
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Callback<std::shared_ptr<std::string>> callback) noexcept;
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std::shared_ptr<std::string> getFile(const std::string & path);
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public:
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virtual void init() override;
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private:
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std::string narMagic;
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std::string narInfoFileFor(const StorePath & storePath);
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void writeNarInfo(ref<NarInfo> narInfo);
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public:
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bool isValidPathUncached(const StorePath & path) override;
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void queryPathInfoUncached(const StorePath & path,
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Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept override;
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std::optional<StorePath> queryPathFromHashPart(const std::string & hashPart) override
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{ unsupported("queryPathFromHashPart"); }
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void addToStore(const ValidPathInfo & info, Source & narSource,
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RepairFlag repair, CheckSigsFlag checkSigs) override;
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StorePath addToStore(const string & name, const Path & srcPath,
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FileIngestionMethod method, HashType hashAlgo,
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PathFilter & filter, RepairFlag repair) override;
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StorePath addTextToStore(const string & name, const string & s,
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const StorePathSet & references, RepairFlag repair) override;
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void narFromPath(const StorePath & path, Sink & sink) override;
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BuildResult buildDerivation(const StorePath & drvPath, const BasicDerivation & drv,
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BuildMode buildMode) override
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{ unsupported("buildDerivation"); }
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void ensurePath(const StorePath & path) override
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{ unsupported("ensurePath"); }
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ref<FSAccessor> getFSAccessor() override;
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void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
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std::shared_ptr<std::string> getBuildLog(const StorePath & path) override;
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};
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MakeError(NoSuchBinaryCacheFile, Error);
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}
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