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| author | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-07-17 18:55:39 -0400 |
|---|---|---|
| committer | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-07-17 18:55:39 -0400 |
| commit | ccc52adfb2121ade510d35dc9b91193af9fa731e (patch) | |
| tree | c6314b5198cdfbe9a21633e515203965ee431382 /perl/lib/Nix/Store.pm | |
| 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 'perl/lib/Nix/Store.pm')
| -rw-r--r-- | perl/lib/Nix/Store.pm | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/perl/lib/Nix/Store.pm b/perl/lib/Nix/Store.pm index 8312a732c..2e79c74fe 100644 --- a/perl/lib/Nix/Store.pm +++ b/perl/lib/Nix/Store.pm @@ -14,6 +14,7 @@ our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } ); our @EXPORT = qw( isValidPath queryReferences queryPathInfo queryDeriver queryPathHash + queryPathFromHashPart topoSortPaths computeFSClosure followLinksToStorePath exportPaths hashPath hashFile hashString addToStore makeFixedOutputPath |