mirror of
https://github.com/NixOS/nix
synced 2024-09-20 11:11:03 -04:00
1aa19b24b2
The flag ‘--check’ to ‘nix-store -r’ or ‘nix-build’ will cause Nix to redo the build of a derivation whose output paths are already valid. If the new output differs from the original output, an error is printed. This makes it easier to test if a build is deterministic. (Obviously this cannot catch all sources of non-determinism, but it catches the most common one, namely the current time.) For example: $ nix-build '<nixpkgs>' -A patchelf ... $ nix-build '<nixpkgs>' -A patchelf --check error: derivation `/nix/store/1ipvxsdnbhl1rw6siz6x92s7sc8nwkkb-patchelf-0.6' may not be deterministic: hash mismatch in output `/nix/store/4pc1dmw5xkwmc6q3gdc9i5nbjl4dkjpp-patchelf-0.6.drv' The --check build fails if not all outputs are valid. Thus the first call to nix-build is necessary to ensure that all outputs are valid. The current outputs are left untouched: the new outputs are either put in a chroot or diverted to a different location in the store using hash rewriting.
105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
#pragma once
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#include <string>
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#include "store-api.hh"
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namespace nix {
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class Pipe;
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class Pid;
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struct FdSink;
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struct FdSource;
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class RemoteStore : public StoreAPI
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{
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public:
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RemoteStore();
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~RemoteStore();
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/* Implementations of abstract store API methods. */
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bool isValidPath(const Path & path);
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PathSet queryValidPaths(const PathSet & paths);
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PathSet queryAllValidPaths();
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ValidPathInfo queryPathInfo(const Path & path);
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Hash queryPathHash(const Path & path);
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void queryReferences(const Path & path, PathSet & references);
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void queryReferrers(const Path & path, PathSet & referrers);
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Path queryDeriver(const Path & path);
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PathSet queryValidDerivers(const Path & path);
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PathSet queryDerivationOutputs(const Path & path);
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StringSet queryDerivationOutputNames(const Path & path);
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Path queryPathFromHashPart(const string & hashPart);
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PathSet querySubstitutablePaths(const PathSet & paths);
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void querySubstitutablePathInfos(const PathSet & paths,
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SubstitutablePathInfos & infos);
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Path addToStore(const Path & srcPath,
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bool recursive = true, HashType hashAlgo = htSHA256,
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PathFilter & filter = defaultPathFilter, bool repair = false);
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Path addTextToStore(const string & name, const string & s,
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const PathSet & references, bool repair = false);
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void exportPath(const Path & path, bool sign,
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Sink & sink);
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Paths importPaths(bool requireSignature, Source & source);
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void buildPaths(const PathSet & paths, BuildMode buildMode);
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void ensurePath(const Path & path);
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void addTempRoot(const Path & path);
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void addIndirectRoot(const Path & path);
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void syncWithGC();
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Roots findRoots();
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void collectGarbage(const GCOptions & options, GCResults & results);
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PathSet queryFailedPaths();
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void clearFailedPaths(const PathSet & paths);
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private:
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AutoCloseFD fdSocket;
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FdSink to;
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FdSource from;
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Pid child;
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unsigned int daemonVersion;
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bool initialised;
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void openConnection(bool reserveSpace = true);
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void processStderr(Sink * sink = 0, Source * source = 0);
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void connectToDaemon();
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void setOptions();
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};
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}
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