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#!/usr/bin/env bash
GUILE=${GUILE:-guile}
set -x
exec $GUILE -e main -s "$0" "$@"
!#
(add-to-load-path (dirname (current-filename)))
(add-to-load-path (string-append (dirname (current-filename)) "/use2dot"))
(use-modules ((graphviz) :prefix #{gv:}#)
((module-introspection) :select (get-forms unique-symbols))
(srfi srfi-1)
(ice-9 match))
(define peg-primitives
'(and or * + ? followed-by not-followed-by peg-any range
ignore capture peg))
(define graph (gv:digraph "G"))
(define (handle-peg-form form)
(match form
(`(define-peg-pattern ,name ,capture ,body)
(let ((node (gv:node graph (format #f "~a" name))))
(gv:setv node "style"
(case capture
((all) "solid")
((body) "dashed")
((none) "dotted"))))
(for-each (lambda (symbol)
(gv:edge graph
(format #f "~a" name)
(format #f "~a" symbol)))
(remove (lambda (x) (memv x peg-primitives))
(unique-symbols (list body)))))))
(define (main args)
(when (< 2 (length args))
(format #t "Usage: ~a <filename>~%" (car args))
(exit 1))
(let ((input-file (cadr args)))
(for-each handle-peg-form
(filter (lambda (x)
(and (list? x)
(not (null? x))
(eq? 'define-peg-pattern (car x))))
(call-with-input-file input-file get-forms))))
(gv:layout graph "dot")
(gv:render graph "pdf" "lex2.pdf")
(display "done\n"))
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