Process FileSystem events, directing the paths to their corresponding pipelines (files and folders) depending on the received events.

Folder Events

Folder events are followed by the :isdir flag.

:moved_from

• Folder renamed or moved: source path.
• Folder deleted: no related :moved_to event will be created, only a single :moved_from event.

:moved_to

• Folder renamed or moved: destination path, there's a related :moved_from event.
• Folder moved from an external folder into the watched folder: there's no related :moved_from event, only a single :moved_to event.
  • Even if the folder is not empty, only a single :moved_to is created for the folder, without any event being created for the folder's contents (not even for subfolders).

File Events

:moved_from

• File renamed or moved: source path.
• File deleted: no related :moved_to event will be created, only a single :moved_from event.

:moved_to

• File renamed or moved: destination path, there's a related :moved_from event.
• File moved from an external folder into the watched folder: there's no related :moved_from event, only a single :moved_to event.

:created and :modified

• When a file is created, the event :created is created.
• For each modification, there's an event :modified.
• Finishing the creation and/or modification of a file ends with [:modified, :closed].
• The event :attribute is also created during file creation/modification, but it's currently of no use for the purpose of this application.