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 (format #f "ps2pdf -sPAPERSIZE=~a '~a'"
38 (sanitize-command-option papersizename) name))
39 (pdf-name (string-append (basename name ".ps") ".pdf" )))
41 (if (access? pdf-name W_OK)
42 (delete-file pdf-name))
44 (format (current-error-port) (_ "Converting to `~a'...") pdf-name)
47 (define-public (postscript->png resolution papersizename name)
49 "ps2png --resolution=~S --papersize=~a~a '~a'"
51 (sanitize-command-option papersizename)
52 (if (ly:get-option 'verbose) " --verbose " "")
54 ;; Do not try to guess the name of the png file
55 (format (current-error-port) (_ "Converting to `~a'...") "png")
58 (define-public (postprocess-output paper-book module filename formats)
61 ((eval (string->symbol (string-append "convert-to-" f))
67 (define-public (completize-formats formats)
70 (if (member "png" formats)
71 (set! formats (cons "ps" formats)))
72 (if (member "pdf" formats)
73 (set! formats (cons "ps" formats)))
77 (if (member x formats) (set! new-fmts (cons x new-fmts))))
78 '("tex" "dvi" "ps" "pdf" "png"))
82 (define (header-to-file file-name key value)
83 (set! key (symbol->string key))
84 (if (not (equal? "-" file-name))
85 (set! file-name (string-append file-name "." key)))
86 (format (current-error-port)
87 (_ "Writing header field `~a' to `~a'...")
89 (if (equal? "-" file-name) "<stdout>" file-name))
90 (if (equal? file-name "-")
92 (display value (open-file file-name "w")))
93 (newline (current-error-port))
96 (define-public (output-scopes scopes fields basename)
97 (define (output-scope scope)
102 (let ((val (if (variable-bound? var) (variable-ref var) "")))
103 (if (and (memq sym fields) (string? val))
104 (header-to-file basename sym val))
107 (apply string-append (map output-scope scopes)))