/usr/share/lilypond/2.14.2/scm/graphviz.scm is in lilypond-data 2.14.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | ;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 2007--2011 Joe Neeman <joeneeman@gmail.com>
;;;;
;;;; LilyPond 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 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
(define-module (scm graphviz)
#:use-module (lily)
#:export
(make-empty-graph add-node add-edge add-cluster
graph-write
))
(define graph-type (make-record-type "graph" '(nodes edges clusters name)))
(define make-graph (record-constructor graph-type))
(define (make-empty-graph name) (make-graph '() '() '() name))
(define nodes (record-accessor graph-type 'nodes))
(define edges (record-accessor graph-type 'edges))
(define clusters (record-accessor graph-type 'clusters))
(define set-nodes! (record-modifier graph-type 'nodes))
(define set-edges! (record-modifier graph-type 'edges))
(define set-clusters! (record-modifier graph-type 'clusters))
(define (add-cluster graph node-id cluster-name)
(let* ((cs (clusters graph))
(cluster (assq cluster-name cs))
(already-in-cluster (if cluster
(cdr cluster)
'())))
(set-clusters! graph (assq-set! cs
cluster-name
(cons node-id already-in-cluster)))))
(define (add-node graph label . cluster-name)
(let* ((ns (nodes graph))
(id (length ns)))
(set-nodes! graph (assq-set! ns id label))
(if (and (not (null? cluster-name))
(string? (car cluster-name)))
(add-cluster graph id (car cluster-name)))
id))
(define (add-edge graph node1 node2)
(set-edges! graph (cons `(,node1 . ,node2) (edges graph))))
(define (graph-write graph out)
(let ((ns (nodes graph))
(es (edges graph))
(cs (clusters graph)))
(ly:message (format (_ "Writing graph `~a'...") (port-filename out)))
(display "digraph G {\nrankdir=\"LR\"\nnode [shape=rectangle]\n" out)
(map (lambda (n) (display (format "~a [label=\"~a\"]\n" (car n) (cdr n)) out))
ns)
(map (lambda (e) (display (format "~a -> ~a\n" (car e) (cdr e)) out))
es)
(map (lambda (c)
(display (format "subgraph cluster_~a {\nlabel= \"~a\"\ncolor=blue\n"
(string-filter (car c) char-alphabetic?)
(car c))
out)
(map (lambda (n) (display (format "~a\n" n) out)) (cdr c))
(display "}\n" out))
cs)
(display "}" out)))
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