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;;; user.rkt -- global bindings visible to geiser users
;; Copyright (C) 2010 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Wed Mar 31, 2010 22:24
#lang racket/base
(provide init-geiser-repl run-geiser-repl enter!)
(require (for-syntax racket/base)
geiser/main geiser/enter geiser/eval geiser/modules)
(define top-namespace (current-namespace))
(define (enter! mod stx)
(cond ((not mod) (current-namespace top-namespace))
((module-path? mod)
(enter-module mod)
(current-namespace (module->namespace mod)))
(else (raise-syntax-error
#f
"not a valid module path, and not #f"
stx
mod))))
(define orig-loader (current-load/use-compiled))
(define geiser-loader (module-loader orig-loader))
(define geiser-send-null (make-parameter #f))
(define (geiser-eval)
(define geiser-main (module->namespace 'geiser/main))
(geiser-send-null #t)
(let* ((mod (read))
(lang (read))
(form (read)))
(datum->syntax #f
(list 'quote
(cond ((equal? form '(unquote apply))
(let* ((proc (eval (read) geiser-main))
(args (read)))
((geiser:eval lang) `(,proc ,@args) mod)))
(else ((geiser:eval lang) form mod)))))))
(define (geiser-read)
(if (geiser-send-null)
(begin (geiser-send-null #f)
(write-char #\nul))
(printf "racket@~a> " (namespace->module-name (current-namespace))))
(flush-output)
(let* ([in (current-input-port)]
[form ((current-read-interaction) (object-name in) in)])
(syntax-case form ()
[(uq cmd) (eq? 'unquote (syntax-e #'uq))
(case (syntax-e #'cmd)
((enter) (enter! (read) #'cmd))
((geiser-eval) (geiser-eval))
((geiser-no-values) (datum->syntax #f (void)))
(else form))]
[_ form])))
(define geiser-prompt-read (make-repl-reader geiser-read))
(define (init-geiser-repl)
(compile-enforce-module-constants #f)
(current-load/use-compiled geiser-loader)
(current-prompt-read geiser-prompt-read))
(define (run-geiser-repl in out enforce-module-constants)
(parameterize [(compile-enforce-module-constants enforce-module-constants)
(current-input-port in)
(current-output-port out)
(current-error-port out)
(current-load/use-compiled geiser-loader)
(current-prompt-read geiser-prompt-read)]
(read-eval-print-loop)))
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