syndicate-2017/racket/syndicate/examples/actor/example-filesystem.rkt

29 lines
1.2 KiB
Racket

#lang syndicate
(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))
(let ((e (read-bytes-line-evt (current-input-port) 'any)))
(spawn #:name 'monitor-shell
(stop-when (message (inbound (external-event e (list (? eof-object? _)))))
(send! (list "close" ?)))
(on (message (inbound (external-event e (list (? bytes? $command-bytes)))))
(send! (string-split (string-trim (bytes->string/utf-8 command-bytes)))))))
(spawn #:name 'monitor-opener
(on (message (list "open" $name))
(spawn #:name (list 'monitor name)
(stop-when (message (list "close" name)))
(on (asserted (file-content name file->bytes $bs))
(log-info "~a: ~v" name bs))))
;; The driver can track directory "contents" just as well as files.
(on (message (list "opendir" $name))
(spawn #:name (list 'monitor name)
(stop-when (message (list "close" name)))
(on (asserted (file-content name directory-list $files))
(log-info "~a: ~v" name files)))))