f186000367
This is to assert that callback functions should never throw (since the context in which they're called may not be able to handle the exception).
116 lines
3.3 KiB
C++
116 lines
3.3 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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class BinaryCacheStore : public Store
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{
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public:
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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<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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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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const std::string & data,
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const std::string & mimeType) = 0;
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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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protected:
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bool wantMassQuery_ = false;
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int priority = 50;
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public:
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virtual void init();
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private:
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std::string narMagic;
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std::string narInfoFileFor(const Path & storePath);
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void writeNarInfo(ref<NarInfo> narInfo);
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public:
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bool isValidPathUncached(const Path & path) override;
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void queryPathInfoUncached(const Path & path,
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Callback<std::shared_ptr<ValidPathInfo>> callback) noexcept override;
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Path queryPathFromHashPart(const string & hashPart) override
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{ unsupported("queryPathFromHashPart"); }
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bool wantMassQuery() override { return wantMassQuery_; }
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void addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
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RepairFlag repair, CheckSigsFlag checkSigs,
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std::shared_ptr<FSAccessor> accessor) override;
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Path addToStore(const string & name, const Path & srcPath,
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bool recursive, HashType hashAlgo,
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PathFilter & filter, RepairFlag repair) override;
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Path addTextToStore(const string & name, const string & s,
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const PathSet & references, RepairFlag repair) override;
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void narFromPath(const Path & path, Sink & sink) override;
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BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
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BuildMode buildMode) override
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{ unsupported("buildDerivation"); }
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void ensurePath(const Path & path) override
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{ unsupported("ensurePath"); }
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ref<FSAccessor> getFSAccessor() override;
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void addSignatures(const Path & storePath, const StringSet & sigs) override;
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std::shared_ptr<std::string> getBuildLog(const Path & path) override;
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int getPriority() override { return priority; }
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};
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MakeError(NoSuchBinaryCacheFile, Error);
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}
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