define events for a project

It would be great to have the possibility to define event for a project. If a file is saved or created, a command or a build will be started.

For example:

{
  "event_systems":
  [
    {
      "event": "onSaved",
      "cmd": [
        "sh build.sh"
      ]
    },
    {
      "event": "onCreateFile",
      "build": "MyBuild"
    }
  ],
  "build_systems":
  [
    {
      "name": "MyBuild",
      "cmd": [
        "mvn", "build"
      ],
      "shell": "true"
    }
  ],
  "folders":
  [
    {
      "name": "My project",
      "path": "/path/to/my/project"
    },
  ],
  "settings":
  {
  }
}