share/guile/1.6.0/scripts/snarf-guile-m4-docs

   1 #!/bin/sh
   2 # aside from this initial boilerplate, this is actually -*- scheme -*- code
   3 main='(module-ref (resolve-module '\''(scripts snarf-guile-m4-docs)) '\'main')'
   4 exec ${GUILE-guile} -l $0 -c "(apply $main (cdr (command-line)))" "$@"
   5 !#
   6 ;;; snarf-guile-m4-docs --- Parse guile.m4 comments for texi documentation
   7
   8 ;;      Copyright (C) 2002 Free Software Foundation, Inc.
   9 ;;
  10 ;; This program is free software; you can redistribute it and/or
  11 ;; modify it under the terms of the GNU General Public License as
  12 ;; published by the Free Software Foundation; either version 2, or
  13 ;; (at your option) any later version.
  14 ;;
  15 ;; This program is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 ;; General Public License for more details.
  19 ;;
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with this software; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  23 ;; Boston, MA 02111-1307 USA
  24
  25 ;;; Author: Thien-Thi Nguyen <ttn@gnu.org>
  26
  27 ;;; Commentary:
  28
  29 ;; Usage: snarf-guile-m4-docs FILE
  30 ;;
  31 ;; Grep FILE for comments preceding macro definitions, massage
  32 ;; them into valid texi, and display to stdout.  For each comment,
  33 ;; lines preceding "^# Usage:" are discarded.
  34 ;;
  35 ;; TODO: Generalize.
  36
  37 ;;; Code:
  38
  39 (define-module (scripts snarf-guile-m4-docs)
  40   :use-module (ice-9 rdelim)
  41   :export (snarf-guile-m4-docs))
  42
  43 (define (display-texi lines)
  44   (display "@deffn {Autoconf Macro}")
  45   (for-each (lambda (line)
  46               (display (cond ((and (>= (string-length line) 2)
  47                                    (string=? "# " (substring line 0 2)))
  48                               (substring line 2))
  49                              ((string=? "#" (substring line 0 1))
  50                               (substring line 1))
  51                              (else line)))
  52               (newline))
  53             lines)
  54   (display "@end deffn")
  55   (newline) (newline))
  56
  57 (define (prefix? line sub)
  58   (false-if-exception
  59    (string=? sub (substring line 0 (string-length sub)))))
  60
  61 (define (massage-usage line)
  62   (let loop ((line (string->list line)) (acc '()))
  63     (if (null? line)
  64         (list (list->string (reverse acc)))
  65         (loop (cdr line)
  66               (cons (case (car line)
  67                       ((#\( #\) #\,) #\space)
  68                       (else (car line)))
  69                     acc)))))
  70
  71 (define (snarf-guile-m4-docs . args)
  72   (let* ((p (open-file (car args) "r"))
  73          (next (lambda () (read-line p))))
  74     (let loop ((line (next)) (acc #f))
  75       (or (eof-object? line)
  76           (cond ((prefix? line "# Usage:")
  77                  (loop (next) (massage-usage (substring line 8))))
  78                 ((prefix? line "AC_DEFUN")
  79                  (display-texi (reverse acc))
  80                  (loop (next) #f))
  81                 ((and acc (prefix? line "#"))
  82                  (loop (next) (cons line acc)))
  83                 (else
  84                  (loop (next) #f)))))))
  85
  86 (define main snarf-guile-m4-docs)
  87
  88 ;;; snarf-guile-m4-docs ends here