syndicate-rkt/syndicate-examples/filesystem.rkt

35 lines
1.4 KiB
Racket

;;; SPDX-License-Identifier: LGPL-3.0-or-later
;;; SPDX-FileCopyrightText: Copyright © 2010-2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
#lang syndicate
(require/activate syndicate/drivers/external-event)
(require/activate syndicate/drivers/filesystem)
(require racket/file)
(require (only-in racket/port read-bytes-line-evt))
(require (only-in racket/string string-trim string-split))
(spawn #:name 'monitor-shell
(define e (read-bytes-line-evt (current-input-port) 'any))
(on (message (inbound (external-event e (list $line))))
(match line
[(? eof-object?)
(stop-current-facet (send! (list "close" 'all)))]
[(? bytes? command-bytes)
(send! (string-split (string-trim (bytes->string/utf-8 command-bytes))))])))
(spawn #:name 'monitor-opener
(define (monitor name reader-proc)
(spawn #:name (list 'monitor name)
(stop-when (message (list "close" 'all))) ;; old-syndicate version used wildcard
(stop-when (message (list "close" name)))
(on (asserted (file-content name reader-proc $data))
(log-info "~a: ~v" name data))))
(on (message (list "open" $name)) (monitor name file->bytes))
;; The driver can track directory "contents" just as well as files.
(on (message (list "opendir" $name)) (monitor name directory-list)))