Modulehackage-security-0.6.4.0Haskell2010

Hackage.Security.Client.Repository.Cache

The files we cache from the repository

Both the Local and the Remote repositories make use of this module.

Synopsis

datadata Cache

Location and layout of the local cache

valuegetCached :: Cache -> CachedFile -> IO (Maybe (Path Absolute))

Get a cached file (if available)

valuegetCachedRoot :: Cache -> IO (Path Absolute)

Get the cached root

Calling getCachedRoot without root info available is a programmer error and will result in an unchecked exception. See requiresBootstrap.

valuegetCachedIndex :: Cache -> Format f -> IO (Maybe (Path Absolute))

Get the cached index (if available)

valueclearCache :: Cache -> IO ()

Delete a previously downloaded remote file

valuewithIndex :: Cache -> (Handle -> IO a) -> IO a

valuegetIndexIdx :: Cache -> IO TarIndex

valuecacheRemoteFile

Cache a previously downloaded remote file

valuelockCache :: Cache -> IO () -> IO ()

Lock the cache

This avoids two concurrent processes updating the cache at the same time, provided they both take the lock.

valuelockCacheWithLogger :: (LogMessage -> IO ()) -> Cache -> IO () -> IO ()

Variant of lockCache which emits LogMessages before and after a possibly blocking file-locking system call