ikarus/scheme/ikarus.main.ss

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;;; Ikarus Scheme -- A compiler for R6RS Scheme.
;;; Copyright (C) 2006,2008 Abdulaziz Ghuloum
;;;
;;; This program is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License version 3 as
;;; published by the Free Software Foundation.
;;;
;;; This program is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; this is here to test that we can import things from other
;;; libraries within the compiler itself.
(library (ikarus startup)
(export print-greeting init-library-path)
(import (ikarus))
(include "ikarus.config.ss")
(define (print-greeting)
(printf "Ikarus Scheme version ~a\n"
(if (zero? (string-length ikarus-revision))
ikarus-version
(format "~a+ (revision ~a, build ~a)"
ikarus-version
(+ 1 (string->number ikarus-revision))
(let-syntax ([ds (lambda (x) (date-string))])
ds))))
(display "Copyright (c) 2006-2008 Abdulaziz Ghuloum\n\n"))
(define (init-library-path)
(define (split s)
(define (nodata i s ls)
(cond
[(= i (string-length s)) ls]
[(char=? (string-ref s i) #\:) (nodata (+ i 1) s ls)]
[else (data (+ i 1) s ls (list (string-ref s i)))]))
(define (data i s ls ac)
(cond
[(= i (string-length s))
(cons (list->string (reverse ac)) ls)]
[(char=? (string-ref s i) #\:)
(nodata (+ i 1) s
(cons (list->string (reverse ac)) ls))]
[else (data (+ i 1) s ls (cons (string-ref s i) ac))]))
(reverse (nodata 0 s '())))
(library-path
(cons "."
(append
(split (getenv "IKARUS_LIBRARY_PATH"))
(list ikarus-lib-dir))))
(library-extensions
(append
(map (lambda (x) (string-append ".ikarus" x))
(library-extensions))
(library-extensions)))))
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;;; Finally, we're ready to evaluate the files and enter the cafe.
(library (ikarus main)
(export)
(import (ikarus)
(ikarus startup)
(only (ikarus load) load-r6rs-top-level))
(init-library-path)
(let-values ([(files script script-type args)
(let f ([args (command-line-arguments)])
(cond
[(null? args) (values '() #f #f '())]
[(string=? (car args) "--")
(values '() #f #f (cdr args))]
[(string=? (car args) "--script")
(let ([d (cdr args)])
(cond
[(null? d)
(die 'ikarus "--script requires a script name")]
[else
(values '() (car d) 'script (cdr d))]))]
[(string=? (car args) "--r6rs-script")
(let ([d (cdr args)])
(cond
[(null? d)
(die 'ikarus "--r6rs-script requires a script name")]
[else
(values '() (car d) 'r6rs-script (cdr d))]))]
[else
(let-values ([(f* script script-type a*) (f (cdr args))])
(values (cons (car args) f*) script script-type a*))]))])
(cond
[(eq? script-type 'r6rs-script)
(command-line-arguments (cons script args))
(load-r6rs-top-level script)
(exit 0)]
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[(eq? script-type 'script) ; no greeting, no cafe
(command-line-arguments (cons script args))
(for-each load files)
(load script)
(exit 0)]
[else
(print-greeting)
(command-line-arguments (cons "*interactive*" args))
(for-each load files)
(new-cafe)
(exit 0)])))