1 ;;;; backend-library.scm -- helpers for the backends.
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2005 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
11 (define-public (ly:system command)
14 (string-append command (if (ly:get-option 'verbose)
16 " > /dev/null 2>&1 "))))
18 (if (ly:get-option 'verbose)
19 (format (current-error-port) (_ "Invoking `~a'...") command))
21 (set! status (system silenced))
24 (format (current-error-port) (_ "`~a' failed (~a)") command status)
25 (newline (current-error-port))
27 ;; hmmm. what's the best failure option?
28 (throw 'ly-file-failed)))))
30 (define-public (sanitize-command-option str)
33 (regexp-substitute/global #f "[^- 0-9,.a-zA-Z'\"\\]" str 'pre 'post)
36 (define-public (postscript->pdf papersizename name)
37 (let* ((cmd (string-append "ps2pdf "
40 (sanitize-command-option papersizename)
43 (pdf-name (string-append (basename name ".ps") ".pdf" )))
45 (if (access? pdf-name W_OK)
46 (delete-file pdf-name))
48 (format (current-error-port) (_ "Converting to `~a'...") pdf-name)
51 (define-public (postscript->png resolution papersize name)
52 (let ((cmd (string-append
53 "ps2png --resolution="
54 (if (number? resolution)
55 (number->string resolution)
57 " --papersize=" (if (string? papersize) papersize "a4")
58 (if (ly:get-option 'verbose)
62 ;; Do not try to guess the name of the png file
63 (format (current-error-port) (_ "Converting to `~a'...") "png")
66 (define-public (postprocess-output paper-book module filename formats)
69 ((eval (string->symbol (string-append "convert-to-" f))
75 (define-public (completize-formats formats)
78 (if (member "png" formats)
79 (set! formats (cons "ps" formats)))
80 (if (member "pdf" formats)
81 (set! formats (cons "ps" formats)))
85 (if (member x formats) (set! new-fmts (cons x new-fmts))))
86 '("tex" "dvi" "ps" "pdf" "png"))
90 (define (header-to-file file-name key value)
91 (set! key (symbol->string key))
92 (if (not (equal? "-" file-name))
93 (set! file-name (string-append file-name "." key)))
94 (format (current-error-port)
95 (_ "Writing header field `~a' to `~a'...")
97 (if (equal? "-" file-name) "<stdout>" file-name))
98 (if (equal? file-name "-")
100 (display value (open-file file-name "w")))
101 (newline (current-error-port))
104 (define-public (output-scopes scopes fields basename)
105 (define (output-scope scope)
110 (let ((val (if (variable-bound? var) (variable-ref var) "")))
111 (if (and (memq sym fields) (string? val))
112 (header-to-file basename sym val))
115 (apply string-append (map output-scope scopes)))