diff options
| author | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-07-17T22·55-0400 |
|---|---|---|
| committer | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-07-17T22·55-0400 |
| commit | ccc52adfb2121ade510d35dc9b91193af9fa731e (patch) | |
| tree | c6314b5198cdfbe9a21633e515203965ee431382 /src/libstore/remote-store.hh | |
| parent | 220818f758d2facc194f567f35ca677ef79393bd (diff) | |
Add function queryPathFromHashPart()
To implement binary caches efficiently, Hydra needs to be able to map the hash part of a store path (e.g. "gbg...zr7") to the full store path (e.g. "/nix/store/gbg...kzr7-subversion-1.7.5"). (The binary cache mechanism uses hash parts as a key for looking up store paths to ensure privacy.) However, doing a search in the Nix store for /nix/store/<hash>* is expensive since it requires reading the entire directory. queryPathFromHashPart() prevents this by doing a cheap database lookup.
Diffstat (limited to 'src/libstore/remote-store.hh')
| -rw-r--r-- | src/libstore/remote-store.hh | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstore/remote-store.hh b/src/libstore/remote-store.hh index e9f40da6dbf4..f0e5dbf7695a 100644 --- a/src/libstore/remote-store.hh +++ b/src/libstore/remote-store.hh @@ -43,6 +43,8 @@ public: StringSet queryDerivationOutputNames(const Path & path); + Path queryPathFromHashPart(const string & hashPart); + bool hasSubstitutes(const Path & path); bool querySubstitutablePathInfo(const Path & path, |