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;;; eval.scm -- Skribilo evaluator.
;;;
;;; Copyright 2003-2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
;;; Copyright 2005 Ludovic Court�s <ludovic.courtes@laas.fr>
;;;
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2 of the License, or
;;; (at your option) any later version.
;;;
;;; 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, write to the Free Software
;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
;;; USA.
(define-module (skribilo evaluator)
:export (skribe-eval skribe-eval-port skribe-load skribe-load-options
skribe-include)
:autoload (skribilo parameters) (*verbose* *document-path*)
:autoload (skribilo location) (<location>)
:autoload (skribilo ast) (ast? markup?)
:autoload (skribilo engine) (engine? find-engine engine-ident)
:autoload (skribilo reader) (%default-reader)
:autoload (skribilo verify) (verify)
:autoload (skribilo resolve) (resolve!))
(use-modules (skribilo utils syntax)
(skribilo debug)
(skribilo output)
(skribilo lib)
(ice-9 optargs)
(oop goops)
(srfi srfi-13)
(srfi srfi-1))
(fluid-set! current-reader %skribilo-module-reader)
(define *skribe-loaded* '()) ;; List of already loaded files
(define *skribe-load-options* '())
;;;
;;; %EVALUATE
;;;
(define (%evaluate expr)
(let ((result (eval expr (current-module))))
(if (ast? result)
(let ((file (source-property expr 'filename))
(line (source-property expr 'line))
(column (source-property expr 'column)))
(slot-set! result 'loc
(make <location>
:file file :line line :pos column))))
result))
;;;
;;; SKRIBE-EVAL
;;;
(define* (skribe-eval a e :key (env '()))
(with-debug 2 'skribe-eval
(debug-item "a=" a " e=" (engine-ident e))
(let ((a2 (resolve! a e env)))
(debug-item "resolved a=" a)
(let ((a3 (verify a2 e)))
(debug-item "verified a=" a3)
(output a3 e)))))
;;;
;;; SKRIBE-EVAL-PORT
;;;
(define* (skribe-eval-port port engine :key (env '())
(reader %default-reader))
(with-debug 2 'skribe-eval-port
(debug-item "engine=" engine)
(debug-item "reader=" reader)
(let ((e (if (symbol? engine) (find-engine engine) engine)))
(debug-item "e=" e)
(if (not (engine? e))
(skribe-error 'skribe-eval-port "cannot find engine" engine)
(let loop ((exp (reader port)))
(with-debug 10 'skribe-eval-port
(debug-item "exp=" exp))
(unless (eof-object? exp)
(skribe-eval (%evaluate exp) e :env env)
(loop (reader port))))))))
;;;
;;; SKRIBE-LOAD
;;;
;;; FIXME: Use a fluid for that.
(define *skribe-load-options* '())
(define (skribe-load-options)
*skribe-load-options*)
(define* (skribe-load file :key (engine #f) (path #f) :rest opt)
(with-debug 4 'skribe-load
(debug-item " engine=" engine)
(debug-item " path=" path)
(debug-item " opt=" opt)
(let* ((ei (*current-engine*))
(path (append (cond
((not path) (*document-path*))
((string? path) (list path))
((not (and (list? path) (every? string? path)))
(skribe-error 'skribe-load "illegal path" path))
(else path))
%load-path))
(filep (or (search-path path file)
(search-path (append path %load-path) file)
(search-path (append path %load-path)
(let ((dot (string-rindex file #\.)))
(if dot
(string-append
(string-take file dot)
".scm")
file))))))
(set! *skribe-load-options* opt)
(unless (and (string? filep) (file-exists? filep))
(skribe-error 'skribe-load
(string-append "cannot find `" file "' in path")
path))
;; Load this file if not already done
(unless (member filep *skribe-loaded*)
(cond
((> (*verbose*) 1)
(format (current-error-port) " [loading file: ~S ~S]\n" filep opt))
((> (*verbose*) 0)
(format (current-error-port) " [loading file: ~S]\n" filep)))
;; Load it
(with-input-from-file filep
(lambda ()
(skribe-eval-port (current-input-port) ei)))
(set! *skribe-loaded* (cons filep *skribe-loaded*))))))
;;;
;;; SKRIBE-INCLUDE
;;;
(define* (skribe-include file :key (path (*document-path*))
(reader %default-reader))
;; FIXME: We should default to `*skribilo-current-reader*'.
(unless (every string? path)
(skribe-error 'skribe-include "illegal path" path))
(let ((path (search-path path file)))
(unless (and (string? path) (file-exists? path))
(skribe-error 'skribe-load
(format #t "cannot find ~S in path" file)
path))
(when (> (*verbose*) 0)
(format (current-error-port) " [including file: ~S]\n" path))
(with-input-from-file path
(lambda ()
(let Loop ((exp (reader (current-input-port)))
(res '()))
(if (eof-object? exp)
(if (and (pair? res) (null? (cdr res)))
(car res)
(reverse! res))
(Loop (reader (current-input-port))
(cons (%evaluate exp) res))))))))
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