From c37c6f39d18274ccac28ed42559681ea271cc496 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Thu, 23 Feb 2012 19:19:37 +0100
Subject: [PATCH] Issue 2343: Faulty file-naming when outputting multiple
 \books

---
 lily/parser.yy             |  2 --
 ly/init.ly                 |  2 --
 ly/music-functions-init.ly |  4 ++--
 scm/lily-library.scm       | 34 ++++++++++++++++++++++++++--------
 4 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/lily/parser.yy b/lily/parser.yy
index 29f4f2a1e0..c26f2aae63 100644
--- a/lily/parser.yy
+++ b/lily/parser.yy
@@ -864,8 +864,6 @@ book_body:
 		push_paper (parser, $$->paper_);
 		$$->header_ = parser->lexer_->lookup_identifier ("$defaultheader");
 		parser->lexer_->set_identifier (ly_symbol2scm ("$current-book"), $$->self_scm ());
-		parser->lexer_->set_identifier (ly_symbol2scm ("book-output-suffix"), SCM_BOOL_F);
-		parser->lexer_->set_identifier (ly_symbol2scm ("book-filename"), SCM_BOOL_F);
 	}
 	| BOOK_IDENTIFIER {
 		$$ = unsmob_book ($1);
diff --git a/ly/init.ly b/ly/init.ly
index 25c2ba0afb..6546ed422a 100644
--- a/ly/init.ly
+++ b/ly/init.ly
@@ -19,8 +19,6 @@
 #(define expect-error #f)
 #(define output-empty-score-list #f)
 #(define output-suffix #f)
-#(define book-filename #f)
-#(define book-output-suffix #f)
 #(use-modules (scm clip-region))
 
 $(if (ly:get-option 'include-settings)
diff --git a/ly/music-functions-init.ly b/ly/music-functions-init.ly
index 4082ea9aec..3c8539e152 100644
--- a/ly/music-functions-init.ly
+++ b/ly/music-functions-init.ly
@@ -186,13 +186,13 @@ bendAfter =
 bookOutputName =
 #(define-void-function (parser location newfilename) (string?)
    (_i "Direct output for the current book block to @var{newfilename}.")
-   (set! book-filename newfilename))
+   (set! (paper-variable parser #f 'output-filename) newfilename))
 
 bookOutputSuffix =
 #(define-void-function (parser location newsuffix) (string?)
    (_i "Set the output filename suffix for the current book block to
 @var{newsuffix}.")
-   (set! book-output-suffix newsuffix))
+   (set! (paper-variable parser #f 'output-suffix) newsuffix))
 
 %% \breathe is defined as a music function rather than an event identifier to
 %% ensure it gets useful input location information: as an event identifier,
diff --git a/scm/lily-library.scm b/scm/lily-library.scm
index 9673c7b3e4..eb537a8e71 100644
--- a/scm/lily-library.scm
+++ b/scm/lily-library.scm
@@ -157,31 +157,31 @@
   (ly:make-score music))
 
 
-(define (get-current-filename parser)
+(define (get-current-filename parser book)
   "return any suffix value for output filename allowing for settings by
 calls to bookOutputName function"
-  (let ((book-filename (ly:parser-lookup parser 'book-filename)))
+  (let ((book-filename (paper-variable parser book 'output-filename)))
     (if (not book-filename)
 	(ly:parser-output-name parser)
 	book-filename)))
 
-(define (get-current-suffix parser)
+(define (get-current-suffix parser book)
   "return any suffix value for output filename allowing for settings by calls to
 bookoutput function"
-  (let ((book-output-suffix (ly:parser-lookup parser 'book-output-suffix)))
+  (let ((book-output-suffix (paper-variable parser book 'output-suffix)))
     (if (not (string? book-output-suffix))
 	(ly:parser-lookup parser 'output-suffix)
 	book-output-suffix)))
 
 (define-public current-outfile-name #f)  ; for use by regression tests
 
-(define (get-outfile-name parser)
+(define (get-outfile-name parser book)
   "return current filename for generating backend output files"
   ;; user can now override the base file name, so we have to use
   ;; the file-name concatenated with any potential output-suffix value
   ;; as the key to out internal a-list
-  (let* ((base-name (get-current-filename parser))
-	 (output-suffix (get-current-suffix parser))
+  (let* ((base-name (get-current-filename parser book))
+	 (output-suffix (get-current-suffix parser book))
 	 (alist-key (format #f "~a~a" base-name output-suffix))
 	 (counter-alist (ly:parser-lookup parser 'counter-alist))
 	 (output-count (assoc-get alist-key counter-alist 0))
@@ -209,7 +209,7 @@ bookoutput function"
 (define (print-book-with parser book process-procedure)
   (let* ((paper (ly:parser-lookup parser '$defaultpaper))
 	 (layout (ly:parser-lookup parser '$defaultlayout))
-	 (outfile-name (get-outfile-name parser)))
+	 (outfile-name (get-outfile-name parser book)))
     (process-procedure book paper layout outfile-name)))
 
 (define-public (print-book-with-defaults parser book)
@@ -230,6 +230,24 @@ bookoutput function"
       (else
           ((ly:parser-lookup parser 'toplevel-score-handler) parser score))))
 
+(define-public paper-variable
+  (let
+      ((get-papers
+	(lambda (parser book)
+	  (append (if (and book (ly:output-def? (ly:book-paper book)))
+		      (list (ly:book-paper book))
+		      '())
+	          (ly:parser-lookup parser '$papers)
+		  (list (ly:parser-lookup parser '$defaultpaper))))))
+    (make-procedure-with-setter
+     (lambda (parser book symbol)
+       (any (lambda (p) (ly:output-def-lookup p symbol #f))
+	    (get-papers parser book)))
+     (lambda (parser book symbol value)
+       (ly:output-def-set-variable!
+	(car (get-papers parser book))
+	symbol value)))))
+
 (define-public (add-text parser text)
   (add-score parser (list text)))
 
-- 
2.39.2