delta: A library for detecting file changes

Delta is a library for detecting file changes in any given directory. The package is written using the sodium FRP library but it also provides a callback based API.

The project also contains an executable, delta-run, which allows you to run arbitrary shell commands when a file in a directory (recursively) changes.

$> delta-run --help
Usage: delta-run [-i|--interval INTERVAL] [-v|--verbose] FILE CMD
Available options:
-h,--help                Show this help text
-i,--interval INTERVAL   Run at most every n seconds
-v,--verbose             Print extra output
FILE                     The directory that is watched
CMD                      The command to run

For example you could use delta-run to rebuild your project everytime the source changes like this: delta-run src "cabal build"

• System
  • System.Delta
    • System.Delta.Base
    • System.Delta.Callback
    • System.Delta.Class
    • System.Delta.FRPUtils
    • System.Delta.FSEvents
    • System.Delta.Poll