forked from lix-project/lix
0afeb7f51e
This allows various Store implementations to provide different ways to get build logs. For example, BinaryCacheStore can get the build logs from the binary cache. Also, remove the log-servers option since we can use substituters for this.
290 lines
8.4 KiB
C++
290 lines
8.4 KiB
C++
#pragma once
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#include "sqlite.hh"
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#include "pathlocks.hh"
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#include "store-api.hh"
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#include "sync.hh"
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#include "util.hh"
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#include <string>
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#include <unordered_set>
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namespace nix {
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/* Nix store and database schema version. Version 1 (or 0) was Nix <=
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0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
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Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.16. Version 6 is
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Nix 1.0. Version 7 is Nix 1.3. Version 10 is 1.12. */
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const int nixSchemaVersion = 10;
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struct Derivation;
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struct OptimiseStats
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{
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unsigned long filesLinked;
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unsigned long long bytesFreed;
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unsigned long long blocksFreed;
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OptimiseStats()
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{
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filesLinked = 0;
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bytesFreed = blocksFreed = 0;
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}
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};
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class LocalStore : public LocalFSStore
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{
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private:
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/* Lock file used for upgrading. */
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AutoCloseFD globalLock;
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struct State
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{
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/* The SQLite database object. */
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SQLite db;
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/* Some precompiled SQLite statements. */
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SQLiteStmt stmtRegisterValidPath;
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SQLiteStmt stmtUpdatePathInfo;
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SQLiteStmt stmtAddReference;
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SQLiteStmt stmtQueryPathInfo;
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SQLiteStmt stmtQueryReferences;
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SQLiteStmt stmtQueryReferrers;
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SQLiteStmt stmtInvalidatePath;
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SQLiteStmt stmtAddDerivationOutput;
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SQLiteStmt stmtQueryValidDerivers;
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SQLiteStmt stmtQueryDerivationOutputs;
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SQLiteStmt stmtQueryPathFromHashPart;
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SQLiteStmt stmtQueryValidPaths;
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/* The file to which we write our temporary roots. */
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Path fnTempRoots;
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AutoCloseFD fdTempRoots;
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};
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Sync<State, std::recursive_mutex> _state;
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public:
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const Path realStoreDir;
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const Path dbDir;
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const Path linksDir;
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const Path reservedPath;
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const Path schemaPath;
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const Path trashDir;
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private:
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bool requireSigs;
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PublicKeys publicKeys;
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public:
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/* Initialise the local store, upgrading the schema if
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necessary. */
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LocalStore(const Params & params);
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~LocalStore();
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/* Implementations of abstract store API methods. */
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std::string getUri() override;
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bool isValidPathUncached(const Path & path) override;
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PathSet queryValidPaths(const PathSet & paths) override;
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PathSet queryAllValidPaths() override;
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void queryPathInfoUncached(const Path & path,
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std::function<void(std::shared_ptr<ValidPathInfo>)> success,
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std::function<void(std::exception_ptr exc)> failure) override;
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void queryReferrers(const Path & path, PathSet & referrers) override;
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PathSet queryValidDerivers(const Path & path) override;
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PathSet queryDerivationOutputs(const Path & path) override;
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StringSet queryDerivationOutputNames(const Path & path) override;
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Path queryPathFromHashPart(const string & hashPart) override;
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PathSet querySubstitutablePaths(const PathSet & paths) override;
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void querySubstitutablePathInfos(const PathSet & paths,
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SubstitutablePathInfos & infos) override;
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void addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
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bool repair, bool dontCheckSigs,
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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, bool repair) override;
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/* Like addToStore(), but the contents of the path are contained
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in `dump', which is either a NAR serialisation (if recursive ==
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true) or simply the contents of a regular file (if recursive ==
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false). */
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Path addToStoreFromDump(const string & dump, const string & name,
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bool recursive = true, HashType hashAlgo = htSHA256, bool repair = false);
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Path addTextToStore(const string & name, const string & s,
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const PathSet & references, bool repair) override;
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void buildPaths(const PathSet & paths, BuildMode buildMode) override;
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BuildResult buildDerivation(const Path & drvPath, const BasicDerivation & drv,
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BuildMode buildMode) override;
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void ensurePath(const Path & path) override;
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void addTempRoot(const Path & path) override;
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void addIndirectRoot(const Path & path) override;
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void syncWithGC() override;
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private:
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typedef std::shared_ptr<AutoCloseFD> FDPtr;
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typedef list<FDPtr> FDs;
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void readTempRoots(PathSet & tempRoots, FDs & fds);
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public:
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Roots findRoots() override;
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void collectGarbage(const GCOptions & options, GCResults & results) override;
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/* Optimise the disk space usage of the Nix store by hard-linking
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files with the same contents. */
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void optimiseStore(OptimiseStats & stats);
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void optimiseStore() override;
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/* Optimise a single store path. */
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void optimisePath(const Path & path);
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bool verifyStore(bool checkContents, bool repair) override;
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/* Register the validity of a path, i.e., that `path' exists, that
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the paths referenced by it exists, and in the case of an output
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path of a derivation, that it has been produced by a successful
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execution of the derivation (or something equivalent). Also
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register the hash of the file system contents of the path. The
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hash must be a SHA-256 hash. */
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void registerValidPath(const ValidPathInfo & info);
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void registerValidPaths(const ValidPathInfos & infos);
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void vacuumDB();
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/* Repair the contents of the given path by redownloading it using
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a substituter (if available). */
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void repairPath(const Path & path);
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void addSignatures(const Path & storePath, const StringSet & sigs) override;
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private:
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int getSchema();
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void openDB(State & state, bool create);
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void makeStoreWritable();
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uint64_t queryValidPathId(State & state, const Path & path);
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uint64_t addValidPath(State & state, const ValidPathInfo & info, bool checkOutputs = true);
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void invalidatePath(State & state, const Path & path);
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/* Delete a path from the Nix store. */
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void invalidatePathChecked(const Path & path);
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void verifyPath(const Path & path, const PathSet & store,
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PathSet & done, PathSet & validPaths, bool repair, bool & errors);
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void updatePathInfo(State & state, const ValidPathInfo & info);
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void upgradeStore6();
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void upgradeStore7();
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PathSet queryValidPathsOld();
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ValidPathInfo queryPathInfoOld(const Path & path);
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struct GCState;
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void deleteGarbage(GCState & state, const Path & path);
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void tryToDelete(GCState & state, const Path & path);
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bool canReachRoot(GCState & state, PathSet & visited, const Path & path);
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void deletePathRecursive(GCState & state, const Path & path);
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bool isActiveTempFile(const GCState & state,
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const Path & path, const string & suffix);
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int openGCLock(LockType lockType);
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void findRoots(const Path & path, unsigned char type, Roots & roots);
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void findRuntimeRoots(PathSet & roots);
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void removeUnusedLinks(const GCState & state);
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Path createTempDirInStore();
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void checkDerivationOutputs(const Path & drvPath, const Derivation & drv);
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typedef std::unordered_set<ino_t> InodeHash;
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InodeHash loadInodeHash();
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Strings readDirectoryIgnoringInodes(const Path & path, const InodeHash & inodeHash);
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void optimisePath_(OptimiseStats & stats, const Path & path, InodeHash & inodeHash);
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// Internal versions that are not wrapped in retry_sqlite.
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bool isValidPath_(State & state, const Path & path);
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void queryReferrers(State & state, const Path & path, PathSet & referrers);
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/* Add signatures to a ValidPathInfo using the secret keys
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specified by the ‘secret-key-files’ option. */
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void signPathInfo(ValidPathInfo & info);
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Path getRealStoreDir() override { return realStoreDir; }
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friend class DerivationGoal;
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friend class SubstitutionGoal;
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};
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typedef std::pair<dev_t, ino_t> Inode;
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typedef set<Inode> InodesSeen;
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/* "Fix", or canonicalise, the meta-data of the files in a store path
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after it has been built. In particular:
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- the last modification date on each file is set to 1 (i.e.,
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00:00:01 1/1/1970 UTC)
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- the permissions are set of 444 or 555 (i.e., read-only with or
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without execute permission; setuid bits etc. are cleared)
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- the owner and group are set to the Nix user and group, if we're
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running as root. */
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void canonicalisePathMetaData(const Path & path, uid_t fromUid, InodesSeen & inodesSeen);
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void canonicalisePathMetaData(const Path & path, uid_t fromUid);
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void canonicaliseTimestampAndPermissions(const Path & path);
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MakeError(PathInUse, Error);
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}
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