Why does LilyPond delete the PDF first?

[Wilbert Berendsen]

Hi, in scm/backend-library there is (line 114-115):

    (if (access? pdf-name W_OK)
        (delete-file pdf-name))

Why is the PDF deleted (instead of just truncated on write)? It breaks the PDF 
watching feature of KDE, because KDE looses the watch on the file because it 
is deleted. When the file is recreated, it has a different inode number, and 
other attributes on the former PDF are lost as well.

Commenting or deleting the two lines does not seem to do any harm on my 
system, and it fixes greatly the behaviour of KPDF and Okular.

best regards,
Wilbert Berendsen

-- 
LilyKDE, LilyPond for KDE: http://lilykde.googlecode.com/