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grd.scm
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#! /usr/bin/env gsi
;;;============================================================================
;;; File: "grd.scm"
;;; Copyright (c) 2011-2012 by Marc Feeley, All Rights Reserved.
;; This program allows remote interaction with the "Gambit REPL dev"
;; app for iOS devices. The "Gambit REPL dev" app must have started a
;; REPL server with the command:
;;
;; (repl-server #f)
;;;============================================================================
(##include "digest.scm")
(##include "genport.scm")
(##include "zlib.scm")
(##include "tar.scm")
;;-----------------------------------------------------------------------------
(##namespace (""))
(##include "~~lib/gambit#.scm")
(##include "digest#.scm")
(##include "genport#.scm")
(##include "zlib#.scm")
(##include "tar#.scm")
(declare
(standard-bindings)
(extended-bindings)
(block)
(generic)
(safe)
)
;;-----------------------------------------------------------------------------
(define REPL-server-port-num 7000)
;;-----------------------------------------------------------------------------
(define usage #<<EOF
This program implements several commands:
grd scan list the Gambit REPL apps on the LAN
grd pwd get current directory
grd cd <remote_dir> change current directory
grd ls [<remote_dir>] list files in directory
grd mkdir <remote_dir> create directory
grd rm <remote_file> remove file or dir
grd mv <rem_file1> <rem_file2> remove file or dir
grd cat <remote_file> show content of file
grd eval <expr> evaluate expression
grd load <remote_file> load file
grd push <local_file> copy local file or dir to iOS device
grd pull <remote_file> copy remote file or dir locally
grd add-script <local_file> add a script to iOS device
A specific "Gambit REPL dev" can be chosen by doing a "scan" or by
using the option "-addr host:port". For example:
% ./grd scan
192.168.0.100:7000 mega.local
192.168.0.101:7000 My-iPhone
% ./grd eval "(host-name)"
"My-iPhone"
% ./grd -addr 192.168.0.100:7000 eval "(host-name)"
"mega.local"
% ./grd eval "(host-name)"
"mega.local"
EOF
)
;;-----------------------------------------------------------------------------
;; Exception related utilities
(define-macro (without-exception expr)
`(with-exception-catcher
(lambda (e) #f)
(lambda () ,expr)))
(define-macro (try-catch expr catch)
`(with-exception-catcher
,catch
(lambda () ,expr)))
(define-macro (try-finally expr final)
(let ((f (gensym)) (r (gensym)))
`(let* ((,f (lambda () ,final))
(,r (with-exception-catcher
(lambda (e) (,f) (raise e))
(lambda () ,expr))))
(,f)
,r)))
;;-----------------------------------------------------------------------------
;; Thread related utilities
(define lock mutex-lock!)
(define unlock mutex-unlock!)
(define signal condition-variable-signal!)
(define-macro (spawn expr)
`(thread-start!
(make-root-thread
(lambda () ,expr))))
(define (halt)
(thread-terminate! (current-thread)))
(define join thread-join!)
(define sleep thread-sleep!)
(define send thread-send)
(define recv thread-receive)
;;-----------------------------------------------------------------------------
;; General purpose utilities
(define (writeln obj #!optional (port (current-output-port)))
(write obj port)
(newline port)
(force-output port))
(define (for lo hi proc)
(if (>= lo hi)
'()
(let ((x (proc lo)))
(cons x (for (+ lo 1) hi proc)))))
(define (pfor lo hi proc)
(if (>= lo hi)
'()
(if (= lo (- hi 1))
(list (proc lo))
(let* ((mid (quotient (+ lo hi) 2))
(a (spawn (pfor lo mid proc)))
(b (pfor mid hi proc)))
(append (join a) b)))))
(define (make-throttle concurrency-limit)
(let ((m (make-mutex))
(cv (make-condition-variable))
(n concurrency-limit))
(lambda (thunk)
(let wait ()
(lock m)
(if (= n 0)
(begin
(unlock m cv) ;; wait on cv
(wait))
(begin
(set! n (- n 1))
(unlock m)
(try-finally
(thunk)
(begin
(lock m)
(set! n (+ n 1))
(signal cv) ;; wake up next waiting thread
(unlock m)))))))))
;;-----------------------------------------------------------------------------
;; Networking related utilities
(define (ip->num ip)
;; (ip->num '#u8(127 0 0 1)) => 2130706433
(do ((i 0 (+ i 1))
(n 0 (+ (* 256 n) (u8vector-ref ip i))))
((= i 4) n)))
(define (num->ip num)
;; (num->ip 2130706433) => #u8(127 0 0 1)
(let ((v (make-u8vector 4)))
(do ((i 3 (- i 1))
(n num (quotient n 256)))
((< i 0) v)
(u8vector-set! v i (modulo n 256)))))
(define (self-local-ip)
;; (self-local-ip) => #u8(192 168 0 100)
(let* ((port (open-tcp-client
(list server-address: '#u8(73 125 226 48) ;; google.com
port-number: 443)))
(ip (socket-info-address
(tcp-client-self-socket-info port))))
(close-port port)
(or ip
'#u8(192 168 0 100)))) ;; sometimes ip=#f on Windows
;;-----------------------------------------------------------------------------
(define (REPL-server-connect addr)
(let ((port
(without-exception
(open-tcp-client
(list server-address: addr
eol-encoding: 'cr-lf)))))
(and port
(try-catch
(begin
(input-port-timeout-set! port 1.0)
(let ((header (read port)))
(input-port-timeout-set! port +inf.0)
(if (equal? header 'Gambit)
(list port addr)
(begin
(close-port port)
#f))))
(lambda (e)
(without-exception (close-port port))
#f)))))
(define (REPL-server-disconnect conn)
(with-exception-catcher
(lambda (e)
#f)
(lambda ()
(let ((port (car conn)))
(display ",qt\n" port)
(force-output port)
(thread-sleep! 0.5)
(close-port port)))))
(define (REPL-server-eval conn expr)
(let ((port (car conn)))
(write `(let ((result (with-exception-catcher (lambda (e) (vector 'exception-was-raised "\n" (with-output-to-string "" (lambda () (display-exception e))))) (lambda () ,expr)))) (display "\n***RESULT***\n") (write result) (newline)) port)
(newline port)
(force-output port)
(let loop ()
(let ((x (read-line port)))
(if (string? x)
(if (string=? x "***RESULT***")
(let ((result (read port)))
(close-port port)
result)
(loop))
(vector 'exception-was-raised "\n" "REPL-server-eval failed"))))))
(define (make-addr ip port-num)
(with-output-to-string
""
(lambda ()
(print (u8vector-ref ip 0)
"."
(u8vector-ref ip 1)
"."
(u8vector-ref ip 2)
"."
(u8vector-ref ip 3)
":"
(number->string port-num)))))
(define (discover-local-REPL-servers ip port-num found)
(let* ((nm #xfffffe00)
(throttle (make-throttle 50)))
(pfor 0
(- #xffffffff nm)
(lambda (i)
(throttle
(lambda ()
(check-for-REPL-server
(make-addr (num->ip (+ i (bitwise-and nm (ip->num ip))))
port-num)
found)))))))
(define (check-for-REPL-server addr found)
(let ((conn (REPL-server-connect addr)))
(if conn
(found conn))
(sleep 1.0)))
(define (scan-local-REPL-servers)
(discover-local-REPL-servers
(self-local-ip)
REPL-server-port-num
(lambda (conn)
(let* ((id (REPL-server-eval conn '(host-name)))
(addr (cadr conn)))
(print addr " " id "\n")
(save-default-addr addr)
(REPL-server-disconnect conn)))))
;;-----------------------------------------------------------------------------
(define (remote-eval addr expr)
(let ((conn (REPL-server-connect addr)))
(if (not conn)
(error "remote-eval could not connect to" addr)
(let ((result (REPL-server-eval conn expr)))
(REPL-server-disconnect conn)
result))))
;;-----------------------------------------------------------------------------
(define (grd-pwd #!key (addr (default-addr)))
(remote-eval addr `(current-directory)))
(define (grd-cd #!optional (path "~") #!key (addr (default-addr)))
(remote-eval addr `(current-directory ,path)))
(define (grd-ls #!optional (path ".") #!key (addr (default-addr)))
(remote-eval addr `(parameterize ((current-directory ,path))
(map (lambda (f)
(if (eq? (file-type f) 'directory)
(string-append f "/")
f))
(directory-files)))))
(define (grd-mkdir path #!key (addr (default-addr)))
(remote-eval addr `(tar#create-dir ,path)))
(define (grd-rm path #!key (addr (default-addr)))
(remote-eval addr `(tar#delete-file-recursive ,path)))
(define (grd-mv path1 path2 #!key (addr (default-addr)))
(remote-eval addr `(rename-file ,path1 ,path2)))
(define (grd-cat path #!key (addr (default-addr)))
(remote-eval addr `(call-with-input-file ,path (lambda (port) (read-line port #f)))))
(define (grd-eval expr #!key (addr (default-addr)))
(remote-eval addr expr))
(define (grd-load filename #!key (addr (default-addr)))
(remote-eval addr `(load ,filename)))
(define (grd-push filename #!key (addr (default-addr)))
(let ((u8vect (tar-pack-u8vector (tar-read filename) #t)))
(pp `(sending ,(u8vector-length u8vect) bytes))
(remote-eval addr `(tar#tar-write-unchecked
(tar#tar-unpack-u8vector ',u8vect #t)))))
(define (grd-pull filename #!key (addr (default-addr)))
(let ((u8vect
(remote-eval addr `(tar#tar-pack-u8vector
(tar#tar-read ,filename)
#t))))
(pp `(received ,(u8vector-length u8vect) bytes))
(tar-write-unchecked
(tar-unpack-u8vector u8vect #t))))
(define (grd-add-script filename #!key (addr (default-addr)))
(let ((script
(call-with-input-file filename (lambda (port) (read-line port #f)))))
(remote-eval addr `(let ((index (script#get-script-index-by-name ,filename)))
(and index (gr#delete-script-event index))
(script#add-script ,filename ,script)
(gr#set-edit-view)))))
;;-----------------------------------------------------------------------------
(define (default-addr)
(with-input-from-file "~/.grd.ini" (lambda () (read-line))))
(define (save-default-addr addr)
(with-output-to-file "~/.grd.ini" (lambda () (println addr))))
(define (main . args)
(define addr #f)
(let loop ((args args))
(if (not (pair? args))
(begin
(print usage)
(exit 1))
(let ((op (car args)))
(cond ((equal? op "-addr")
(if (not (pair? (cdr args)))
(error "address expected"))
(set! addr (cadr args))
(save-default-addr addr)
(loop (cddr args)))
((equal? op "-load")
(if (not (pair? (cdr args)))
(error "filename expected"))
(load (cadr args))
(loop (cddr args)))
((equal? op "-repl")
(##repl-debug-main))
((equal? op "scan")
(scan-local-REPL-servers))
((equal? op "pwd")
(println
(if addr
(grd-pwd addr: addr)
(grd-pwd))))
((equal? op "cd")
(if (not (pair? (cdr args)))
(error "path expected"))
(let ((path (cadr args)))
(println
(if addr
(grd-cd path addr: addr)
(grd-cd path)))))
((equal? op "ls")
(for-each
(lambda (path)
(let ((x (if addr
(grd-ls path addr: addr)
(grd-ls path))))
(if (list? x)
(for-each println x)
(println x))))
(if (pair? (cdr args)) (cdr args) '("."))))
((equal? op "mkdir")
(for-each
(lambda (path)
(println
(if addr
(grd-mkdir path addr: addr)
(grd-mkdir path))))
(cdr args)))
((equal? op "rm")
(for-each
(lambda (path)
(println
(if addr
(grd-rm path addr: addr)
(grd-rm path))))
(cdr args)))
((equal? op "mv")
(if (or (not (pair? (cdr args)))
(not (pair? (cddr args))))
(error "paths expected"))
(let ((path1 (cadr args))
(path2 (caddr args)))
(println
(if addr
(grd-mv path1 path2 addr: addr)
(grd-mv path1 path2)))))
((equal? op "cat")
(for-each
(lambda (path)
(println
(if addr
(grd-cat path addr: addr)
(grd-cat path))))
(cdr args)))
((equal? op "eval")
(for-each
(lambda (str)
(let ((expr (with-input-from-string str read)))
(pretty-print
(if addr
(grd-eval expr addr: addr)
(grd-eval expr)))))
(cdr args)))
((equal? op "load")
(for-each
(lambda (filename)
(pretty-print
(if addr
(grd-load filename addr: addr)
(grd-load filename))))
(cdr args)))
((equal? op "push")
(for-each
(lambda (filename)
(if addr
(grd-push filename addr: addr)
(grd-push filename)))
(cdr args)))
((equal? op "pull")
(for-each
(lambda (filename)
(if addr
(grd-pull filename addr: addr)
(grd-pull filename)))
(cdr args)))
((equal? op "add-script")
(for-each
(lambda (filename)
(if addr
(grd-add-script filename addr: addr)
(grd-add-script filename)))
(cdr args)))
(else
(error "unknown operation" op)))))))
;;;============================================================================