1 ;;;; backend-library.scm -- helpers for the backends.
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 2005--2006 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
11 (define-public (ly:system command)
13 (dev-null "/dev/null")
14 (silenced (if (or (ly:get-option 'verbose)
15 (not (access? dev-null W_OK)))
17 (format #f "~a > ~a 2>&1 " command dev-null))))
18 (if (ly:get-option 'verbose)
19 (ly:message (_ "Invoking `~a'...") command))
21 (set! status (system silenced))
24 (ly:message (_ "`~a' failed (~a)") command status)
26 ;; hmmm. what's the best failure option?
27 (throw 'ly-file-failed)))))
29 (define-public (sanitize-command-option str)
30 "Kill dubious shell quoting"
34 (regexp-substitute/global #f "[^-_ 0-9,.a-zA-Z'\"\\]" str 'pre 'post)
37 (define-public (search-executable names)
38 (define (helper path lst)
41 (if (search-path path (car lst)) (car lst)
42 (helper path (cdr lst)))))
44 (let ((path (parse-path (getenv "PATH"))))
47 (define-public (search-gs)
48 (search-executable '("gs-nox" "gs-8.15" "gs")))
50 (define-public (postscript->pdf papersizename name)
51 (let* ((pdf-name (string-append (basename name ".ps") ".pdf"))
56 -dCompatibilityLevel=1.4 \
67 (if (ly:get-option 'verbose) "" "-q")
68 (if (ly:get-option 'gs-font-load)
71 (sanitize-command-option papersizename)
74 ;; The wrapper on windows cannot handle `=' signs,
75 ;; gs has a workaround with #.
76 (if (eq? PLATFORM 'windows)
78 (set! cmd (string-regexp-substitute "=" "#" cmd))
79 (set! cmd (string-regexp-substitute "-dSAFER " "" cmd))))
81 (if (access? pdf-name W_OK)
82 (delete-file pdf-name))
84 (ly:message (_ "Converting to `~a'...") pdf-name)
89 (use-modules (scm ps-to-png))
91 (define-public (postscript->png resolution paper-size-name name)
92 ;; Do not try to guess the name of the png file,
93 ;; GS produces PNG files like BASE-page%d.png.
94 ;;(ly:message (_ "Converting to `~a'...")
95 ;; (string-append (basename name ".ps") "-page1.png" )))
96 (let ((paper-size (sanitize-command-option paper-size-name))
97 (verbose (ly:get-option 'verbose))
100 (ly:message (_ "Converting to ~a...") "PNG")
101 (make-ps-images name resolution paper-size rename-page-1 verbose
102 (ly:get-option 'anti-alias-factor))
105 (define-public (postprocess-output paper-book module filename formats)
107 ((completed (completize-formats formats))
108 (base (string-regexp-substitute "\\.[a-z]+$" "" filename))
109 (intermediate (remove
115 ((eval (string->symbol (string-append "convert-to-" f)) module)
116 paper-book filename))
119 (if (ly:get-option 'delete-intermediate-files)
122 (delete-file (string-append base "." f)))
126 (define-public (completize-formats formats)
127 (define new-fmts '())
129 (if (member "png" formats)
130 (set! formats (cons "ps" formats)))
131 (if (member "pdf" formats)
132 (set! formats (cons "ps" formats)))
136 (if (member x formats) (set! new-fmts (cons x new-fmts))))
137 '("tex" "dvi" "ps" "pdf" "png"))
139 (uniq-list (reverse new-fmts)))
141 (define (header-to-file file-name key value)
142 (set! key (symbol->string key))
143 (if (not (equal? "-" file-name))
144 (set! file-name (string-append file-name "." key)))
145 (ly:message (_ "Writing header field `~a' to `~a'...")
147 (if (equal? "-" file-name) "<stdout>" file-name))
148 (if (equal? file-name "-")
150 (display value (open-file file-name "w")))
154 (define-public (output-scopes scopes fields basename)
155 (define (output-scope scope)
160 (let ((val (if (variable-bound? var) (variable-ref var) "")))
161 (if (and (memq sym fields) (string? val))
162 (header-to-file basename sym val))
165 (apply string-append (map output-scope scopes)))