filewatch/add

    cfunction
    src/core/filewatch.c on line 599, column 1

    (filewatch/add watcher path &opt flags)

    Add a path to the watcher. Available flags depend on the current 
    OS, and are as follows:

    Windows/MINGW (flags correspond to FILE_NOTIFY_CHANGE_* flags in 
    win32 documentation):

    * `:all` - trigger an event for all of the below triggers.

    * `:attributes` - FILE_NOTIFY_CHANGE_ATTRIBUTES

    * `:creation` - FILE_NOTIFY_CHANGE_CREATION

    * `:dir-name` - FILE_NOTIFY_CHANGE_DIR_NAME

    * `:last-access` - FILE_NOTIFY_CHANGE_LAST_ACCESS

    * `:last-write` - FILE_NOTIFY_CHANGE_LAST_WRITE

    * `:security` - FILE_NOTIFY_CHANGE_SECURITY

    * `:size` - FILE_NOTIFY_CHANGE_SIZE

    * `:recursive` - watch subdirectories recursively

    Linux (flags correspond to IN_* flags from <sys/inotify.h>):

    * `:access` - IN_ACCESS

    * `:all` - IN_ALL_EVENTS

    * `:attrib` - IN_ATTRIB

    * `:close-nowrite` - IN_CLOSE_NOWRITE

    * `:close-write` - IN_CLOSE_WRITE

    * `:create` - IN_CREATE

    * `:delete` - IN_DELETE

    * `:delete-self` - IN_DELETE_SELF

    * `:ignored` - IN_IGNORED

    * `:modify` - IN_MODIFY

    * `:move-self` - IN_MOVE_SELF

    * `:moved-from` - IN_MOVED_FROM

    * `:moved-to` - IN_MOVED_TO

    * `:open` - IN_OPEN

    * `:q-overflow` - IN_Q_OVERFLOW

    * `:unmount` - IN_UNMOUNT

    On Windows, events will have the following possible types:

    * `:unknown`

    * `:added`

    * `:removed`

    * `:modified`

    * `:renamed-old`

    * `:renamed-new`

    On Linux, events will a `:type` corresponding to the possible 
    flags, excluding `:all`.