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)
49 ;; must be sure that we don't catch stuff from old GUBs.
50 (search-executable '("gs")))
52 (define-public (postscript->pdf paper-width paper-height name)
53 (let* ((pdf-name (string-append (basename name ".ps") ".pdf"))
58 -dCompatibilityLevel=1.4 \
59 -dDEVICEWIDTHPOINTS=~,2f -dDEVICEHEIGHTPOINTS=~,2f\
69 (if (ly:get-option 'verbose) "" "-q")
70 (if (ly:get-option 'gs-font-load)
77 ;; The wrapper on windows cannot handle `=' signs,
78 ;; gs has a workaround with #.
79 (if (eq? PLATFORM 'windows)
81 (set! cmd (string-regexp-substitute "=" "#" cmd))
82 (set! cmd (string-regexp-substitute "-dSAFER " "" cmd))))
84 (if (access? pdf-name W_OK)
85 (delete-file pdf-name))
87 (ly:message (_ "Converting to `~a'...") pdf-name)
92 (use-modules (scm ps-to-png))
94 (define-public (postscript->png resolution paper-width paper-height name)
95 ;; Do not try to guess the name of the png file,
96 ;; GS produces PNG files like BASE-page%d.png.
97 ;;(ly:message (_ "Converting to `~a'...")
98 ;; (string-append (basename name ".ps") "-page1.png" )))
99 (let ((verbose (ly:get-option 'verbose))
102 (ly:message (_ "Converting to ~a...") "PNG")
103 (make-ps-images name resolution paper-width paper-height rename-page-1 verbose
104 (ly:get-option 'anti-alias-factor))
107 (define-public (postprocess-output paper-book module filename formats)
109 ((completed (completize-formats formats))
110 (base (string-regexp-substitute "\\.[a-z]+$" "" filename))
111 (intermediate (remove
117 ((eval (string->symbol (string-append "convert-to-" f)) module)
118 paper-book filename))
121 (if (ly:get-option 'delete-intermediate-files)
124 (delete-file (string-append base "." f)))
128 (define-public (completize-formats formats)
129 (define new-fmts '())
131 (if (member "png" formats)
132 (set! formats (cons "ps" formats)))
133 (if (member "pdf" formats)
134 (set! formats (cons "ps" formats)))
138 (if (member x formats) (set! new-fmts (cons x new-fmts))))
139 '("tex" "dvi" "ps" "pdf" "png"))
141 (uniq-list (reverse new-fmts)))
143 (define (header-to-file file-name key value)
144 (set! key (symbol->string key))
145 (if (not (equal? "-" file-name))
146 (set! file-name (string-append file-name "." key)))
147 (ly:message (_ "Writing header field `~a' to `~a'...")
149 (if (equal? "-" file-name) "<stdout>" file-name))
150 (if (equal? file-name "-")
152 (display value (open-file file-name "w")))
156 (define-public (output-scopes scopes fields basename)
157 (define (output-scope scope)
162 (let ((val (if (variable-bound? var) (variable-ref var) "")))
163 (if (and (memq sym fields) (string? val))
164 (header-to-file basename sym val))
167 (apply string-append (map output-scope scopes)))