twitch-0.1.3.0: A high level file watcher DSL

Twitch is a monadic DSL and library for file watching. It conveniently utilizes 'do' notation in the style of Shake and clay to expose the functionality of the fsnotify cross-platform file system watcher.

Here is an example that converts Markdown files to HTML and reloads Safari whenever the input files change.

import Twitch
import Filesystem.Path.CurrentOS

main = defaultMain $ do
"*.md"   |> \filePath -> system $ "pandoc -t html " ++ encodeString filePath
"*.html" |> \_ -> system $ "osascript refreshSafari.AppleScript"