* scripts/lilypond-book.py (do_file): search chunks for

[lilypond.git] / scripts / lilypond-book.py

diff --git a/scripts/lilypond-book.py b/scripts/lilypond-book.py
index d349c29bc3e46fd1497ba820f2ee27ac2810c60c..673afa8d3363e1bcbe374ad5eeb732d530578307 100644 (file)
--- a/scripts/lilypond-book.py
+++ b/scripts/lilypond-book.py
@@ -710,6 +710,9 @@ class Chunk:
        def png_is_outdated (self):
                return 0
 
+       def is_plain (self):
+               return false
+       
 class Substring (Chunk):
        def __init__ (self, source, start, end, line_number):
                self.source = source
@@ -717,6 +720,9 @@ class Substring (Chunk):
                self.end = end
                self.line_number = line_number
                self.override_text = None
+               
+       def is_plain (self):
+               return true
 
        def replacement_text (self):
                if self.override_text:
@@ -1521,10 +1527,12 @@ def do_file (input_filename):
                ly.progress (_ ("Dissecting..."))
                chunks = find_toplevel_snippets (source, snippet_types)
 
-               if format == LATEX: 
-                       modify_preamble (chunks[0])
-                       
-               
+               if format == LATEX:
+                       for c in chunks:
+                               if (c.is_plain () and
+                                   re.search (r"\\begin{document}", c.replacement_text())):
+                                       modify_preamble (chunks[0])
+                                       break
                ly.progress ('\n')
 
                if filter_cmd: