System.Delta.Class

Documentation

class FileWatcher a where

A class for watching a directory based on functional reactive programming At the core of this class are three event streams:

• changedFiles is a stream of FileInfos on changed files
• newFiles is a stream of canonicalized FilePaths of newly created files
• deletedFiles is a stream of canonicalized FilePaths of deleted files

Minimal complete definition

defaultWatcher, changedFiles, newFiles, deletedFiles, cleanUpAndClose, mergeWatchers

Methods

defaultWatcher :: FilePath -> IO a

Each type provides a default watcher for a pass

changedFiles :: a -> Event FileInfo

An event that gives some info on changed files (disjunct from deleted and new files)

newFiles :: a -> Event FilePath

An event that fires for each new file

deletedFiles :: a -> Event FilePath

An event that fires for each deleted path

cleanUpAndClose :: a -> IO ()

Free all possibly used resources. No event will fire after this.

mergeWatchers :: a -> a -> a

Merge two watchers that are watching different directories

watchPaths :: FileWatcher a => [FilePath] -> Maybe (IO a)

Create a watcher on all of the given paths

Instances

FileWatcher PollWatcher