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* More progress.

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This commit is contained in:
Eelco Dolstra 2008-03-04 18:16:31 +00:00
parent 22c225a899
commit 07da660396
10 changed files with 346 additions and 475 deletions
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47
src/libstore/local-store.hh
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@ -9,9 +9,6 @@
namespace nix {
class Transaction;
/* Nix store and database schema version. Version 1 (or 0) was Nix <=
0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
Version 4 is Nix 0.11. Version 5 is Nix 0.12*/
@ -43,15 +40,9 @@ private:
public:
/* Open the database environment. If `reserveSpace' is true, make
sure that a big empty file exists in /nix/var/nix/db/reserved.
If `reserveSpace' is false, delete this file if it exists. The
idea is that on normal operation, the file exists; but when we
run the garbage collector, it is deleted. This is to ensure
that the garbage collector has a small amount of disk space
available, which is required to open the Berkeley DB
environment. */
LocalStore(bool reserveSpace);
/* Initialise the local store, upgrading the schema if
necessary. */
LocalStore();
~LocalStore();
@ -103,12 +94,16 @@ public:
/* Optimise the disk space usage of the Nix store by hard-linking
files with the same contents. */
void optimiseStore(bool dryRun, OptimiseStats & stats);
/* Check the integrity of the Nix store. */
void verifyStore(bool checkContents);
private:
bool queryReferrersInternal(const Path & path, PathSet & referrers);
};
/* Get a transaction object. */
void createStoreTransaction(Transaction & txn);
/* Copy a path recursively. */
void copyPath(const Path & src, const Path & dst);
@ -118,14 +113,12 @@ void copyPath(const Path & src, const Path & dst);
the derivation (or something equivalent). Also register the hash
of the file system contents of the path. The hash must be a
SHA-256 hash. */
void registerValidPath(const Transaction & txn,
const Path & path, const Hash & hash, const PathSet & references,
const Path & deriver);
void registerValidPath(const Path & path,
const Hash & hash, const PathSet & references, const Path & deriver);
typedef list<ValidPathInfo> ValidPathInfos;
void registerValidPaths(const Transaction & txn,
const ValidPathInfos & infos);
void registerValidPaths(const ValidPathInfos & infos);
/* "Fix", or canonicalise, the meta-data of the files in a store path
after it has been built. In particular:
@ -137,25 +130,11 @@ void registerValidPaths(const Transaction & txn,
in a setuid Nix installation. */
void canonicalisePathMetaData(const Path & path);
/* Checks whether a path is valid. */
bool isValidPathTxn(const Transaction & txn, const Path & path);
/* Sets the set of outgoing FS references for a store path. Use with
care! */
void setReferences(const Transaction & txn, const Path & path,
const PathSet & references);
/* Sets the deriver of a store path. Use with care! */
void setDeriver(const Transaction & txn, const Path & path,
const Path & deriver);
/* Delete a value from the nixStore directory. */
void deleteFromStore(const Path & path, unsigned long long & bytesFreed);
MakeError(PathInUse, Error);
void verifyStore(bool checkContents);
/* Whether we are in build users mode. */
bool haveBuildUsers();