A command line tool that uses dispatch sources to monitor file system events

Example of monitoring a create and delete:

% watch ~/Desktop Watching: /Users/user/Desktop [2010-11-07 23:31:13 -0800] Added: /Users/user/Desktop/file [2010-11-07 23:31:13 -0800] Changed: /Users/user/Desktop [2010-11-07 23:31:16 -0800] Removed: /Users/user/Desktop/file [2010-11-07 23:31:16 -0800] Changed: /Users/user/Desktop [2010-11-07 23:31:16 -0800] Changed: /Users/user/Desktop/.DS_Store [2010-11-07 23:31:16 -0800] Changed: /Users/user/Desktop/.DS_Store [2010-11-07 23:31:21 -0800] Changed: /Users/user/Desktop/.DS_Store [2010-11-07 23:31:21 -0800] Changed: /Users/user/Desktop/.DS_Store

Example of creating a adding several directories and removing with a maximum watch depth of 10:

% watch -r 10
Watching: /Users/user/src/a [2010-11-07 23:35:02 -0800] Added: /Users/user/src/a/s [2010-11-07 23:35:02 -0800] Changed: /Users/user/src/a [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s/d/f/g/2/r [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s/d/f/g/2 [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s/d/f/g [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s/d/f [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s/d [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s [2010-11-07 23:35:10 -0800] Removed: /Users/user/src/a/s [2010-11-07 23:35:10 -0800] Changed: /Users/user/src/a