watch_for_path

Wait recursively for a path to exist.

For instance, say you're creating an environment that is going to get deployed to by Capistrano, and you want to monitor current/tmp/restart.txt to know when a deployment is completed. You can't just do an fs.watch, since current/tmp doesn't exist. watch_for_path will find the closest path of the path that does exist, and will watch for your file from there.

Usage:

    Watch = require "watch-for-path"

    new Watch "./current/tmp/restart.txt", (err) ->
      if !err
        # File has shown up!

Arguments are the path to watch and a callback to fire when the path shows up.